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Merge pull request #17796 from epiclabs-io/mru-feeds 

swarm/storage/feeds: Renamed MRU to Swarm Feeds
This commit is contained in:
Viktor Trón 2018-10-03 14:59:41 +02:00 committed by GitHub
parent 303b99663e de01178c18
commit e5677114dc
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GPG Key ID: 4AEE18F83AFDEB23
44 changed files with 740 additions and 812 deletions
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2
.github/CODEOWNERS vendored
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@ -27,6 +27,6 @@ swarm/services @zelig
swarm/state @justelad
swarm/storage/encryption @gbalint @zelig @nagydani
swarm/storage/mock @janos
swarm/storage/mru @nolash
swarm/storage/feed @nolash @jpeletier
swarm/testutil @lmars
whisper/ @gballet @gluk256

72
cmd/swarm/mru.go → cmd/swarm/feeds.go
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@ -14,7 +14,7 @@
// You should have received a copy of the GNU General Public License
// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
// Command resource allows the user to create and update signed mutable resource updates
// Command feed allows the user to create and update signed Swarm feeds
package main
import (
@ -27,17 +27,17 @@ import (
"github.com/ethereum/go-ethereum/cmd/utils"
swarm "github.com/ethereum/go-ethereum/swarm/api/client"
"github.com/ethereum/go-ethereum/swarm/storage/mru"
"github.com/ethereum/go-ethereum/swarm/storage/feed"
"gopkg.in/urfave/cli.v1"
)
func NewGenericSigner(ctx *cli.Context) mru.Signer {
return mru.NewGenericSigner(getPrivKey(ctx))
func NewGenericSigner(ctx *cli.Context) feed.Signer {
return feed.NewGenericSigner(getPrivKey(ctx))
}
func getTopic(ctx *cli.Context) (topic mru.Topic) {
var name = ctx.String(SwarmResourceNameFlag.Name)
var relatedTopic = ctx.String(SwarmResourceTopicFlag.Name)
func getTopic(ctx *cli.Context) (topic feed.Topic) {
var name = ctx.String(SwarmFeedNameFlag.Name)
var relatedTopic = ctx.String(SwarmFeedTopicFlag.Name)
var relatedTopicBytes []byte
var err error
@ -48,42 +48,42 @@ func getTopic(ctx *cli.Context) (topic mru.Topic) {
}
}
topic, err = mru.NewTopic(name, relatedTopicBytes)
topic, err = feed.NewTopic(name, relatedTopicBytes)
if err != nil {
utils.Fatalf("Error parsing topic: %s", err)
}
return topic
}
// swarm resource create <frequency> [--name <name>] [--data <0x Hexdata> [--multihash=false]]
// swarm resource update <Manifest Address or ENS domain> <0x Hexdata> [--multihash=false]
// swarm resource info <Manifest Address or ENS domain>
// swarm feed create <frequency> [--name <name>] [--data <0x Hexdata> [--multihash=false]]
// swarm feed update <Manifest Address or ENS domain> <0x Hexdata> [--multihash=false]
// swarm feed info <Manifest Address or ENS domain>
func resourceCreate(ctx *cli.Context) {
func feedCreateManifest(ctx *cli.Context) {
var (
bzzapi = strings.TrimRight(ctx.GlobalString(SwarmApiFlag.Name), "/")
client = swarm.NewClient(bzzapi)
)
newResourceRequest := mru.NewFirstRequest(getTopic(ctx))
newResourceRequest.View.User = resourceGetUser(ctx)
newFeedUpdateRequest := feed.NewFirstRequest(getTopic(ctx))
newFeedUpdateRequest.Feed.User = feedGetUser(ctx)
manifestAddress, err := client.CreateResource(newResourceRequest)
manifestAddress, err := client.CreateFeedWithManifest(newFeedUpdateRequest)
if err != nil {
utils.Fatalf("Error creating resource: %s", err.Error())
utils.Fatalf("Error creating feed manifest: %s", err.Error())
return
}
fmt.Println(manifestAddress) // output manifest address to the user in a single line (useful for other commands to pick up)
}
func resourceUpdate(ctx *cli.Context) {
func feedUpdate(ctx *cli.Context) {
args := ctx.Args()
var (
bzzapi = strings.TrimRight(ctx.GlobalString(SwarmApiFlag.Name), "/")
client = swarm.NewClient(bzzapi)
manifestAddressOrDomain = ctx.String(SwarmResourceManifestFlag.Name)
manifestAddressOrDomain = ctx.String(SwarmFeedManifestFlag.Name)
)
if len(args) < 1 {
@ -100,20 +100,20 @@ func resourceUpdate(ctx *cli.Context) {
return
}
var updateRequest *mru.Request
var query *mru.Query
var updateRequest *feed.Request
var query *feed.Query
if manifestAddressOrDomain == "" {
query = new(mru.Query)
query = new(feed.Query)
query.User = signer.Address()
query.Topic = getTopic(ctx)
}
// Retrieve resource status and metadata out of the manifest
updateRequest, err = client.GetResourceMetadata(query, manifestAddressOrDomain)
// Retrieve a feed update request
updateRequest, err = client.GetFeedRequest(query, manifestAddressOrDomain)
if err != nil {
utils.Fatalf("Error retrieving resource status: %s", err.Error())
utils.Fatalf("Error retrieving feed status: %s", err.Error())
}
// set the new data
@ -121,34 +121,34 @@ func resourceUpdate(ctx *cli.Context) {
// sign update
if err = updateRequest.Sign(signer); err != nil {
utils.Fatalf("Error signing resource update: %s", err.Error())
utils.Fatalf("Error signing feed update: %s", err.Error())
}
// post update
err = client.UpdateResource(updateRequest)
err = client.UpdateFeed(updateRequest)
if err != nil {
utils.Fatalf("Error updating resource: %s", err.Error())
utils.Fatalf("Error updating feed: %s", err.Error())
return
}
}
func resourceInfo(ctx *cli.Context) {
func feedInfo(ctx *cli.Context) {
var (
bzzapi = strings.TrimRight(ctx.GlobalString(SwarmApiFlag.Name), "/")
client = swarm.NewClient(bzzapi)
manifestAddressOrDomain = ctx.String(SwarmResourceManifestFlag.Name)
manifestAddressOrDomain = ctx.String(SwarmFeedManifestFlag.Name)
)
var query *mru.Query
var query *feed.Query
if manifestAddressOrDomain == "" {
query = new(mru.Query)
query = new(feed.Query)
query.Topic = getTopic(ctx)
query.User = resourceGetUser(ctx)
query.User = feedGetUser(ctx)
}
metadata, err := client.GetResourceMetadata(query, manifestAddressOrDomain)
metadata, err := client.GetFeedRequest(query, manifestAddressOrDomain)
if err != nil {
utils.Fatalf("Error retrieving resource metadata: %s", err.Error())
utils.Fatalf("Error retrieving feed metadata: %s", err.Error())
return
}
encodedMetadata, err := metadata.MarshalJSON()
@ -158,8 +158,8 @@ func resourceInfo(ctx *cli.Context) {
fmt.Println(string(encodedMetadata))
}
func resourceGetUser(ctx *cli.Context) common.Address {
var user = ctx.String(SwarmResourceUserFlag.Name)
func feedGetUser(ctx *cli.Context) common.Address {
var user = ctx.String(SwarmFeedUserFlag.Name)
if user != "" {
return common.HexToAddress(user)
}

44
cmd/swarm/mru_test.go → cmd/swarm/feeds_test.go
View File

@ -26,11 +26,11 @@ import (
"testing"
"github.com/ethereum/go-ethereum/swarm/api"
"github.com/ethereum/go-ethereum/swarm/storage/mru/lookup"
"github.com/ethereum/go-ethereum/swarm/storage/feed/lookup"
"github.com/ethereum/go-ethereum/swarm/testutil"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/swarm/storage/mru"
"github.com/ethereum/go-ethereum/swarm/storage/feed"
"github.com/ethereum/go-ethereum/common/hexutil"
"github.com/ethereum/go-ethereum/log"
@ -38,12 +38,12 @@ import (
swarmhttp "github.com/ethereum/go-ethereum/swarm/api/http"
)
func TestCLIResourceUpdate(t *testing.T) {
func TestCLIFeedUpdate(t *testing.T) {
srv := testutil.NewTestSwarmServer(t, func(api *api.API) testutil.TestServer {
return swarmhttp.NewServer(api, "")
}, nil)
log.Info("starting 1 node cluster")
log.Info("starting a test swarm server")
defer srv.Close()
// create a private key file for signing
@ -65,7 +65,7 @@ func TestCLIResourceUpdate(t *testing.T) {
}
// compose a topic. We'll be doing quotes about Miguel de Cervantes
var topic mru.Topic
var topic feed.Topic
subject := []byte("Miguel de Cervantes")
copy(topic[:], subject[:])
name := "quotes"
@ -77,13 +77,13 @@ func TestCLIResourceUpdate(t *testing.T) {
flags := []string{
"--bzzapi", srv.URL,
"--bzzaccount", pkfile.Name(),
"resource", "update",
"feed", "update",
"--topic", topic.Hex(),
"--name", name,
hexData}
// create an update and expect an exit without errors
log.Info(fmt.Sprintf("updating a resource with 'swarm resource update'"))
log.Info(fmt.Sprintf("updating a feed with 'swarm feed update'"))
cmd := runSwarm(t, flags...)
cmd.ExpectExit()
@ -95,22 +95,22 @@ func TestCLIResourceUpdate(t *testing.T) {
// build the same topic as before, this time
// we use NewTopic to create a topic automatically.
topic, err = mru.NewTopic(name, subject)
topic, err = feed.NewTopic(name, subject)
if err != nil {
t.Fatal(err)
}
// View configures whose updates we will be looking up.
view := mru.View{
// Feed configures whose updates we will be looking up.
fd := feed.Feed{
Topic: topic,
User: address,
}
// Build a query to get the latest update
query := mru.NewQueryLatest(&view, lookup.NoClue)
query := feed.NewQueryLatest(&fd, lookup.NoClue)
// retrieve content!
reader, err := client.GetResource(query, "")
reader, err := client.QueryFeed(query, "")
if err != nil {
t.Fatal(err)
}
@ -128,45 +128,45 @@ func TestCLIResourceUpdate(t *testing.T) {
// Now retrieve info for the next update
flags = []string{
"--bzzapi", srv.URL,
"resource", "info",
"feed", "info",
"--topic", topic.Hex(),
"--user", address.Hex(),
}
log.Info(fmt.Sprintf("getting resource info with 'swarm resource info'"))
log.Info(fmt.Sprintf("getting feed info with 'swarm feed info'"))
cmd = runSwarm(t, flags...)
_, matches := cmd.ExpectRegexp(`.*`) // regex hack to extract stdout
cmd.ExpectExit()
// verify we can deserialize the result as a valid JSON
var request mru.Request
var request feed.Request
err = json.Unmarshal([]byte(matches[0]), &request)
if err != nil {
t.Fatal(err)
}
// make sure the retrieved view is the same
if request.View != view {
t.Fatalf("Expected view to be: %s, got %s", view, request.View)
// make sure the retrieved feed is the same
if request.Feed != fd {
t.Fatalf("Expected feed to be: %s, got %s", fd, request.Feed)
}
// test publishing a manifest
flags = []string{
"--bzzapi", srv.URL,
"--bzzaccount", pkfile.Name(),
"resource", "create",
"feed", "create",
"--topic", topic.Hex(),
}
log.Info(fmt.Sprintf("Publishing manifest with 'swarm resource create'"))
log.Info(fmt.Sprintf("Publishing manifest with 'swarm feed create'"))
cmd = runSwarm(t, flags...)
_, matches = cmd.ExpectRegexp(`[a-f\d]{64}`) // regex hack to extract stdout
cmd.ExpectExit()
manifestAddress := matches[0] // read the received resource manifest
manifestAddress := matches[0] // read the received feed manifest
// now attempt to lookup the latest update using a manifest instead
reader, err = client.GetResource(nil, manifestAddress)
reader, err = client.QueryFeed(nil, manifestAddress)
if err != nil {
t.Fatal(err)
}

66
cmd/swarm/main.go
View File

@ -207,25 +207,25 @@ var (
Name: "compressed",
Usage: "Prints encryption keys in compressed form",
}
SwarmResourceNameFlag = cli.StringFlag{
SwarmFeedNameFlag = cli.StringFlag{
Name: "name",
Usage: "User-defined name for the new resource, limited to 32 characters. If combined with topic, the resource will be a subtopic with this name",
Usage: "User-defined name for the new feed, limited to 32 characters. If combined with topic, it will refer to a subtopic with this name",
}
SwarmResourceTopicFlag = cli.StringFlag{
SwarmFeedTopicFlag = cli.StringFlag{
Name: "topic",
Usage: "User-defined topic this resource is tracking, hex encoded. Limited to 64 hexadecimal characters",
Usage: "User-defined topic this feed is tracking, hex encoded. Limited to 64 hexadecimal characters",
}
SwarmResourceDataOnCreateFlag = cli.StringFlag{
SwarmFeedDataOnCreateFlag = cli.StringFlag{
Name: "data",
Usage: "Initializes the resource with the given hex-encoded data. Data must be prefixed by 0x",
Usage: "Initializes the feed with the given hex-encoded data. Data must be prefixed by 0x",
}
SwarmResourceManifestFlag = cli.StringFlag{
SwarmFeedManifestFlag = cli.StringFlag{
Name: "manifest",
Usage: "Refers to the resource through a manifest",
Usage: "Refers to the feed through a manifest",
}
SwarmResourceUserFlag = cli.StringFlag{
SwarmFeedUserFlag = cli.StringFlag{
Name: "user",
Usage: "Indicates the user who updates the resource",
Usage: "Indicates the user who updates the feed",
}
)
@ -346,62 +346,62 @@ func init() {
},
{
CustomHelpTemplate: helpTemplate,
Name: "resource",
Usage: "(Advanced) Create and update Mutable Resources",
Name: "feed",
Usage: "(Advanced) Create and update Swarm Feeds",
ArgsUsage: "<create|update|info>",
Description: "Works with Mutable Resource Updates",
Description: "Works with Swarm Feeds",
Subcommands: []cli.Command{
{
Action: resourceCreate,
Action: feedCreateManifest,
CustomHelpTemplate: helpTemplate,
Name: "create",
Usage: "creates and publishes a new Mutable Resource manifest",
Description: `creates and publishes a new Mutable Resource manifest pointing to a specified user's updates about a particular topic.
The resource topic can be built in the following ways:
Usage: "creates and publishes a new feed manifest",
Description: `creates and publishes a new feed manifest pointing to a specified user's updates about a particular topic.
The feed topic can be built in the following ways:
* use --topic to set the topic to an arbitrary binary hex string.
* use --name to set the topic to a human-readable name.
For example --name could be set to "profile-picture", meaning this Mutable Resource allows to get this user's current profile picture.
For example --name could be set to "profile-picture", meaning this feed allows to get this user's current profile picture.
* use both --topic and --name to create named subtopics.
For example, --topic could be set to an Ethereum contract address and --name could be set to "comments", meaning
the Mutable Resource tracks a discussion about that contract.
this feed tracks a discussion about that contract.
The --user flag allows to have this manifest refer to a user other than yourself. If not specified,
it will then default to your local account (--bzzaccount)`,
Flags: []cli.Flag{SwarmResourceNameFlag, SwarmResourceTopicFlag, SwarmResourceUserFlag},
Flags: []cli.Flag{SwarmFeedNameFlag, SwarmFeedTopicFlag, SwarmFeedUserFlag},
},
{
Action: resourceUpdate,
Action: feedUpdate,
CustomHelpTemplate: helpTemplate,
Name: "update",
Usage: "updates the content of an existing Mutable Resource",
Usage: "updates the content of an existing Swarm Feed",
ArgsUsage: "<0x Hex data>",
Description: `publishes a new update on the specified topic
The resource topic can be built in the following ways:
The feed topic can be built in the following ways:
* use --topic to set the topic to an arbitrary binary hex string.
* use --name to set the topic to a human-readable name.
For example --name could be set to "profile-picture", meaning this Mutable Resource allows to get this user's current profile picture.
For example --name could be set to "profile-picture", meaning this feed allows to get this user's current profile picture.
* use both --topic and --name to create named subtopics.
For example, --topic could be set to an Ethereum contract address and --name could be set to "comments", meaning
the Mutable Resource tracks a discussion about that contract.
this feed tracks a discussion about that contract.
If you have a manifest, you can specify it with --manifest to refer to the resource,
If you have a manifest, you can specify it with --manifest to refer to the feed,
instead of using --topic / --name
`,
Flags: []cli.Flag{SwarmResourceManifestFlag, SwarmResourceNameFlag, SwarmResourceTopicFlag},
Flags: []cli.Flag{SwarmFeedManifestFlag, SwarmFeedNameFlag, SwarmFeedTopicFlag},
},
{
Action: resourceInfo,
Action: feedInfo,
CustomHelpTemplate: helpTemplate,
Name: "info",
Usage: "obtains information about an existing Mutable Resource",
Description: `obtains information about an existing Mutable Resource
Usage: "obtains information about an existing Swarm feed",
Description: `obtains information about an existing Swarm feed
The topic can be specified directly with the --topic flag as an hex string
If no topic is specified, the default topic (zero) will be used
The --name flag can be used to specify subtopics with a specific name.
The --user flag allows to refer to a user other than yourself. If not specified,
it will then default to your local account (--bzzaccount)
If you have a manifest, you can specify it with --manifest instead of --topic / --name / ---user
to refer to the resource`,
Flags: []cli.Flag{SwarmResourceManifestFlag, SwarmResourceNameFlag, SwarmResourceTopicFlag, SwarmResourceUserFlag},
to refer to the feed`,
Flags: []cli.Flag{SwarmFeedManifestFlag, SwarmFeedNameFlag, SwarmFeedTopicFlag, SwarmFeedUserFlag},
},
},
},
@ -730,7 +730,7 @@ func getAccount(bzzaccount string, ctx *cli.Context, stack *node.Node) *ecdsa.Pr
}
// getPrivKey returns the private key of the specified bzzaccount
// Used only by client commands, such as `resource`
// Used only by client commands, such as `feed`
func getPrivKey(ctx *cli.Context) *ecdsa.PrivateKey {
// booting up the swarm node just as we do in bzzd action
bzzconfig, err := buildConfig(ctx)

2
swarm/OWNERS
View File

@ -22,5 +22,5 @@ swarm
├── storage ─────────────── ethersphere
│ ├── encryption ──────── @gbalint, @zelig, @nagydani
│ ├── mock ────────────── @janos
│ └── mru ─────────────── @nolash
│ └── feed ────────────── @nolash, @jpeletier
└── testutil ────────────── @lmars

124
swarm/api/api.go
View File

@ -45,9 +45,10 @@ import (
"github.com/ethereum/go-ethereum/swarm/multihash"
"github.com/ethereum/go-ethereum/swarm/spancontext"
"github.com/ethereum/go-ethereum/swarm/storage"
"github.com/ethereum/go-ethereum/swarm/storage/mru"
"github.com/ethereum/go-ethereum/swarm/storage/mru/lookup"
"github.com/opentracing/opentracing-go"
"github.com/ethereum/go-ethereum/swarm/storage/feed"
"github.com/ethereum/go-ethereum/swarm/storage/feed/lookup"
opentracing "github.com/opentracing/opentracing-go"
)
var (
@ -235,18 +236,18 @@ on top of the FileStore
it is the public interface of the FileStore which is included in the ethereum stack
*/
type API struct {
resource *mru.Handler
feed *feed.Handler
fileStore *storage.FileStore
dns Resolver
Decryptor func(context.Context, string) DecryptFunc
}
// NewAPI the api constructor initialises a new API instance.
func NewAPI(fileStore *storage.FileStore, dns Resolver, resourceHandler *mru.Handler, pk *ecdsa.PrivateKey) (self *API) {
func NewAPI(fileStore *storage.FileStore, dns Resolver, feedHandler *feed.Handler, pk *ecdsa.PrivateKey) (self *API) {
self = &API{
fileStore: fileStore,
dns: dns,
resource: resourceHandler,
feed: feedHandler,
Decryptor: func(ctx context.Context, credentials string) DecryptFunc {
return self.doDecrypt(ctx, credentials, pk)
},
@ -403,24 +404,24 @@ func (a *API) Get(ctx context.Context, decrypt DecryptFunc, manifestAddr storage
return a.Get(ctx, decrypt, adr, entry.Path)
}
// we need to do some extra work if this is a mutable resource manifest
if entry.ContentType == ResourceContentType {
if entry.ResourceView == nil {
return reader, mimeType, status, nil, fmt.Errorf("Cannot decode ResourceView in manifest")
// we need to do some extra work if this is a Swarm feed manifest
if entry.ContentType == FeedContentType {
if entry.Feed == nil {
return reader, mimeType, status, nil, fmt.Errorf("Cannot decode Feed in manifest")
}
_, err := a.resource.Lookup(ctx, mru.NewQueryLatest(entry.ResourceView, lookup.NoClue))
_, err := a.feed.Lookup(ctx, feed.NewQueryLatest(entry.Feed, lookup.NoClue))
if err != nil {
apiGetNotFound.Inc(1)
status = http.StatusNotFound
log.Debug(fmt.Sprintf("get resource content error: %v", err))
log.Debug(fmt.Sprintf("get feed update content error: %v", err))
return reader, mimeType, status, nil, err
}
// get the data of the update
_, rsrcData, err := a.resource.GetContent(entry.ResourceView)
_, rsrcData, err := a.feed.GetContent(entry.Feed)
if err != nil {
apiGetNotFound.Inc(1)
status = http.StatusNotFound
log.Warn(fmt.Sprintf("get resource content error: %v", err))
log.Warn(fmt.Sprintf("get feed update content error: %v", err))
return reader, mimeType, status, nil, err
}
@ -429,18 +430,18 @@ func (a *API) Get(ctx context.Context, decrypt DecryptFunc, manifestAddr storage
if err != nil {
apiGetInvalid.Inc(1)
status = http.StatusUnprocessableEntity
log.Warn("invalid resource multihash", "err", err)
log.Warn("invalid multihash in feed update", "err", err)
return reader, mimeType, status, nil, err
}
manifestAddr = storage.Address(decodedMultihash)
log.Trace("resource is multihash", "key", manifestAddr)
log.Trace("feed update contains multihash", "key", manifestAddr)
// get the manifest the multihash digest points to
trie, err := loadManifest(ctx, a.fileStore, manifestAddr, nil, NOOPDecrypt)
if err != nil {
apiGetNotFound.Inc(1)
status = http.StatusNotFound
log.Warn(fmt.Sprintf("loadManifestTrie (resource multihash) error: %v", err))
log.Warn(fmt.Sprintf("loadManifestTrie (feed update multihash) error: %v", err))
return reader, mimeType, status, nil, err
}
@ -450,13 +451,13 @@ func (a *API) Get(ctx context.Context, decrypt DecryptFunc, manifestAddr storage
if entry == nil {
status = http.StatusNotFound
apiGetNotFound.Inc(1)
err = fmt.Errorf("manifest (resource multihash) entry for '%s' not found", path)
log.Trace("manifest (resource multihash) entry not found", "key", manifestAddr, "path", path)
err = fmt.Errorf("manifest (feed update multihash) entry for '%s' not found", path)
log.Trace("manifest (feed update multihash) entry not found", "key", manifestAddr, "path", path)
return reader, mimeType, status, nil, err
}
}
// regardless of resource update manifests or normal manifests we will converge at this point
// regardless of feed update manifests or normal manifests we will converge at this point
// get the key the manifest entry points to and serve it if it's unambiguous
contentAddr = common.Hex2Bytes(entry.Hash)
status = entry.Status
@ -956,68 +957,67 @@ func (a *API) BuildDirectoryTree(ctx context.Context, mhash string, nameresolver
return addr, manifestEntryMap, nil
}
// ResourceLookup finds mutable resource updates at specific periods and versions
func (a *API) ResourceLookup(ctx context.Context, query *mru.Query) ([]byte, error) {
_, err := a.resource.Lookup(ctx, query)
// FeedsLookup finds Swarm feeds updates at specific points in time, or the latest update
func (a *API) FeedsLookup(ctx context.Context, query *feed.Query) ([]byte, error) {
_, err := a.feed.Lookup(ctx, query)
if err != nil {
return nil, err
}
var data []byte
_, data, err = a.resource.GetContent(&query.View)
_, data, err = a.feed.GetContent(&query.Feed)
if err != nil {
return nil, err
}
return data, nil
}
// ResourceNewRequest creates a Request object to update a specific mutable resource
func (a *API) ResourceNewRequest(ctx context.Context, view *mru.View) (*mru.Request, error) {
return a.resource.NewRequest(ctx, view)
// FeedsNewRequest creates a Request object to update a specific feed
func (a *API) FeedsNewRequest(ctx context.Context, feed *feed.Feed) (*feed.Request, error) {
return a.feed.NewRequest(ctx, feed)
}
// ResourceUpdate updates a Mutable Resource with arbitrary data.
// Upon retrieval the update will be retrieved verbatim as bytes.
func (a *API) ResourceUpdate(ctx context.Context, request *mru.Request) (storage.Address, error) {
return a.resource.Update(ctx, request)
// FeedsUpdate publishes a new update on the given feed
func (a *API) FeedsUpdate(ctx context.Context, request *feed.Request) (storage.Address, error) {
return a.feed.Update(ctx, request)
}
// ResourceHashSize returned the size of the digest produced by the Mutable Resource hashing function
func (a *API) ResourceHashSize() int {
return a.resource.HashSize
// FeedsHashSize returned the size of the digest produced by Swarm feeds' hashing function
func (a *API) FeedsHashSize() int {
return a.feed.HashSize
}
// ErrCannotLoadResourceManifest is returned when looking up a resource manifest fails
var ErrCannotLoadResourceManifest = errors.New("Cannot load resource manifest")
// ErrCannotLoadFeedManifest is returned when looking up a feeds manifest fails
var ErrCannotLoadFeedManifest = errors.New("Cannot load feed manifest")
// ErrNotAResourceManifest is returned when the address provided returned something other than a valid manifest
var ErrNotAResourceManifest = errors.New("Not a resource manifest")
// ErrNotAFeedManifest is returned when the address provided returned something other than a valid manifest
var ErrNotAFeedManifest = errors.New("Not a feed manifest")
// ResolveResourceManifest retrieves the Mutable Resource manifest for the given address, and returns the Resource's view ID.
func (a *API) ResolveResourceManifest(ctx context.Context, addr storage.Address) (*mru.View, error) {
// ResolveFeedManifest retrieves the Swarm feed manifest for the given address, and returns the referenced Feed.
func (a *API) ResolveFeedManifest(ctx context.Context, addr storage.Address) (*feed.Feed, error) {
trie, err := loadManifest(ctx, a.fileStore, addr, nil, NOOPDecrypt)
if err != nil {
return nil, ErrCannotLoadResourceManifest
return nil, ErrCannotLoadFeedManifest
}
entry, _ := trie.getEntry("")
if entry.ContentType != ResourceContentType {
return nil, ErrNotAResourceManifest
if entry.ContentType != FeedContentType {
return nil, ErrNotAFeedManifest
}
return entry.ResourceView, nil
return entry.Feed, nil
}
// ErrCannotResolveResourceURI is returned when the ENS resolver is not able to translate a name to a resource
var ErrCannotResolveResourceURI = errors.New("Cannot resolve Resource URI")
// ErrCannotResolveFeedURI is returned when the ENS resolver is not able to translate a name to a Swarm feed
var ErrCannotResolveFeedURI = errors.New("Cannot resolve Feed URI")
// ErrCannotResolveResourceView is returned when values provided are not enough or invalid to recreate a
// resource view out of them.
var ErrCannotResolveResourceView = errors.New("Cannot resolve resource view")
// ErrCannotResolveFeed is returned when values provided are not enough or invalid to recreate a
// feed out of them.
var ErrCannotResolveFeed = errors.New("Cannot resolve Feed")
// ResolveResourceView attempts to extract View information out of the manifest, if provided
// If not, it attempts to extract the View out of a set of key-value pairs
func (a *API) ResolveResourceView(ctx context.Context, uri *URI, values mru.Values) (*mru.View, error) {
var view *mru.View
// ResolveFeed attempts to extract feed information out of the manifest, if provided
// If not, it attempts to extract the feed out of a set of key-value pairs
func (a *API) ResolveFeed(ctx context.Context, uri *URI, values feed.Values) (*feed.Feed, error) {
var fd *feed.Feed
var err error
if uri.Addr != "" {
// resolve the content key.
@ -1025,25 +1025,25 @@ func (a *API) ResolveResourceView(ctx context.Context, uri *URI, values mru.Valu
if manifestAddr == nil {
manifestAddr, err = a.Resolve(ctx, uri.Addr)
if err != nil {
return nil, ErrCannotResolveResourceURI
return nil, ErrCannotResolveFeedURI
}
}
// get the resource view from the manifest
view, err = a.ResolveResourceManifest(ctx, manifestAddr)
// get the Swarm feed from the manifest
fd, err = a.ResolveFeedManifest(ctx, manifestAddr)
if err != nil {
return nil, err
}
log.Debug("handle.get.resource: resolved", "manifestkey", manifestAddr, "view", view.Hex())
log.Debug("handle.get.feed: resolved", "manifestkey", manifestAddr, "feed", fd.Hex())
} else {
var v mru.View
if err := v.FromValues(values); err != nil {
return nil, ErrCannotResolveResourceView
var f feed.Feed
if err := f.FromValues(values); err != nil {
return nil, ErrCannotResolveFeed
}
view = &v
fd = &f
}
return view, nil
return fd, nil
}
// MimeOctetStream default value of http Content-Type header

61
swarm/api/client/client.go
View File

@ -35,7 +35,7 @@ import (
"strings"
"github.com/ethereum/go-ethereum/swarm/api"
"github.com/ethereum/go-ethereum/swarm/storage/mru"
"github.com/ethereum/go-ethereum/swarm/storage/feed"
)
var (
@ -601,16 +601,15 @@ func (c *Client) MultipartUpload(hash string, uploader Uploader) (string, error)
return string(data), nil
}
// ErrNoResourceUpdatesFound is returned when Swarm cannot find updates of the given resource
var ErrNoResourceUpdatesFound = errors.New("No updates found for this resource")
// ErrNoFeedUpdatesFound is returned when Swarm cannot find updates of the given feed
var ErrNoFeedUpdatesFound = errors.New("No updates found for this feed")
// CreateResource creates a Mutable Resource with the given name and frequency, initializing it with the provided
// data. Data is interpreted as multihash or not depending on the multihash parameter.
// startTime=0 means "now"
// Returns the resulting Mutable Resource manifest address that you can use to include in an ENS Resolver (setContent)
// or reference future updates (Client.UpdateResource)
func (c *Client) CreateResource(request *mru.Request) (string, error) {
responseStream, err := c.updateResource(request, true)
// CreateFeedWithManifest creates a feed manifest, initializing it with the provided
// data
// Returns the resulting feed manifest address that you can use to include in an ENS Resolver (setContent)
// or reference future updates (Client.UpdateFeed)
func (c *Client) CreateFeedWithManifest(request *feed.Request) (string, error) {
responseStream, err := c.updateFeed(request, true)
if err != nil {
return "", err
}
@ -628,18 +627,18 @@ func (c *Client) CreateResource(request *mru.Request) (string, error) {
return manifestAddress, nil
}
// UpdateResource allows you to set a new version of your content
func (c *Client) UpdateResource(request *mru.Request) error {
_, err := c.updateResource(request, false)
// UpdateFeed allows you to set a new version of your content
func (c *Client) UpdateFeed(request *feed.Request) error {
_, err := c.updateFeed(request, false)
return err
}
func (c *Client) updateResource(request *mru.Request, createManifest bool) (io.ReadCloser, error) {
func (c *Client) updateFeed(request *feed.Request, createManifest bool) (io.ReadCloser, error) {
URL, err := url.Parse(c.Gateway)
if err != nil {
return nil, err
}
URL.Path = "/bzz-resource:/"
URL.Path = "/bzz-feed:/"
values := URL.Query()
body := request.AppendValues(values)
if createManifest {
@ -660,23 +659,23 @@ func (c *Client) updateResource(request *mru.Request, createManifest bool) (io.R
return res.Body, nil
}
// GetResource returns a byte stream with the raw content of the resource
// manifestAddressOrDomain is the address you obtained in CreateResource or an ENS domain whose Resolver
// QueryFeed returns a byte stream with the raw content of the feed update
// manifestAddressOrDomain is the address you obtained in CreateFeedWithManifest or an ENS domain whose Resolver
// points to that address
func (c *Client) GetResource(query *mru.Query, manifestAddressOrDomain string) (io.ReadCloser, error) {
return c.getResource(query, manifestAddressOrDomain, false)
func (c *Client) QueryFeed(query *feed.Query, manifestAddressOrDomain string) (io.ReadCloser, error) {
return c.queryFeed(query, manifestAddressOrDomain, false)
}
// getResource returns a byte stream with the raw content of the resource
// manifestAddressOrDomain is the address you obtained in CreateResource or an ENS domain whose Resolver
// queryFeed returns a byte stream with the raw content of the feed update
// manifestAddressOrDomain is the address you obtained in CreateFeedWithManifest or an ENS domain whose Resolver
// points to that address
// meta set to true will instruct the node return resource metainformation instead
func (c *Client) getResource(query *mru.Query, manifestAddressOrDomain string, meta bool) (io.ReadCloser, error) {
// meta set to true will instruct the node return feed metainformation instead
func (c *Client) queryFeed(query *feed.Query, manifestAddressOrDomain string, meta bool) (io.ReadCloser, error) {
URL, err := url.Parse(c.Gateway)
if err != nil {
return nil, err
}
URL.Path = "/bzz-resource:/" + manifestAddressOrDomain
URL.Path = "/bzz-feed:/" + manifestAddressOrDomain
values := URL.Query()
if query != nil {
query.AppendValues(values) //adds query parameters
@ -692,7 +691,7 @@ func (c *Client) getResource(query *mru.Query, manifestAddressOrDomain string, m
if res.StatusCode != http.StatusOK {
if res.StatusCode == http.StatusNotFound {
return nil, ErrNoResourceUpdatesFound
return nil, ErrNoFeedUpdatesFound
}
errorMessageBytes, err := ioutil.ReadAll(res.Body)
var errorMessage string
@ -701,18 +700,18 @@ func (c *Client) getResource(query *mru.Query, manifestAddressOrDomain string, m
} else {
errorMessage = string(errorMessageBytes)
}
return nil, fmt.Errorf("Error retrieving resource: %s", errorMessage)
return nil, fmt.Errorf("Error retrieving feed updates: %s", errorMessage)
}
return res.Body, nil
}
// GetResourceMetadata returns a structure that describes the Mutable Resource
// manifestAddressOrDomain is the address you obtained in CreateResource or an ENS domain whose Resolver
// GetFeedRequest returns a structure that describes the referenced feed status
// manifestAddressOrDomain is the address you obtained in CreateFeedWithManifest or an ENS domain whose Resolver
// points to that address
func (c *Client) GetResourceMetadata(query *mru.Query, manifestAddressOrDomain string) (*mru.Request, error) {
func (c *Client) GetFeedRequest(query *feed.Query, manifestAddressOrDomain string) (*feed.Request, error) {
responseStream, err := c.getResource(query, manifestAddressOrDomain, true)
responseStream, err := c.queryFeed(query, manifestAddressOrDomain, true)
if err != nil {
return nil, err
}
@ -723,7 +722,7 @@ func (c *Client) GetResourceMetadata(query *mru.Query, manifestAddressOrDomain s
return nil, err
}
var metadata mru.Request
var metadata feed.Request
if err := metadata.UnmarshalJSON(body); err != nil {
return nil, err
}

86
swarm/api/client/client_test.go
View File

@ -25,14 +25,14 @@ import (
"sort"
"testing"
"github.com/ethereum/go-ethereum/swarm/storage/mru/lookup"
"github.com/ethereum/go-ethereum/swarm/storage/feed/lookup"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/swarm/api"
swarmhttp "github.com/ethereum/go-ethereum/swarm/api/http"
"github.com/ethereum/go-ethereum/swarm/multihash"
"github.com/ethereum/go-ethereum/swarm/storage/mru"
"github.com/ethereum/go-ethereum/swarm/storage/feed"
"github.com/ethereum/go-ethereum/swarm/testutil"
)
@ -361,20 +361,20 @@ func TestClientMultipartUpload(t *testing.T) {
}
}
func newTestSigner() (*mru.GenericSigner, error) {
func newTestSigner() (*feed.GenericSigner, error) {
privKey, err := crypto.HexToECDSA("deadbeefdeadbeefdeadbeefdeadbeefdeadbeefdeadbeefdeadbeefdeadbeef")
if err != nil {
return nil, err
}
return mru.NewGenericSigner(privKey), nil
return feed.NewGenericSigner(privKey), nil
}
// test the transparent resolving of multihash resource types with bzz:// scheme
// test the transparent resolving of multihash feed updates with bzz:// scheme
//
// first upload data, and store the multihash to the resulting manifest in a resource update
// first upload data, and store the multihash to the resulting manifest in a feed update
// retrieving the update with the multihash should return the manifest pointing directly to the data
// and raw retrieve of that hash should return the data
func TestClientCreateResourceMultihash(t *testing.T) {
func TestClientCreateFeedMultihash(t *testing.T) {
signer, _ := newTestSigner()
@ -393,36 +393,36 @@ func TestClientCreateResourceMultihash(t *testing.T) {
s := common.FromHex(swarmHash)
mh := multihash.ToMultihash(s)
// our mutable resource topic
topic, _ := mru.NewTopic("foo.eth", nil)
// our feed topic
topic, _ := feed.NewTopic("foo.eth", nil)
createRequest := mru.NewFirstRequest(topic)
createRequest := feed.NewFirstRequest(topic)
createRequest.SetData(mh)
if err := createRequest.Sign(signer); err != nil {
t.Fatalf("Error signing update: %s", err)
}
resourceManifestHash, err := client.CreateResource(createRequest)
feedManifestHash, err := client.CreateFeedWithManifest(createRequest)
if err != nil {
t.Fatalf("Error creating resource: %s", err)
t.Fatalf("Error creating feed manifest: %s", err)
}
correctManifestAddrHex := "6ef40ba1492cf2a029dc9a8b5896c822cf689d3cd010842f4f1744e6db8824bd"
if resourceManifestHash != correctManifestAddrHex {
t.Fatalf("Response resource manifest mismatch, expected '%s', got '%s'", correctManifestAddrHex, resourceManifestHash)
correctManifestAddrHex := "bb056a5264c295c2b0f613c8409b9c87ce9d71576ace02458160df4cc894210b"
if feedManifestHash != correctManifestAddrHex {
t.Fatalf("Response feed manifest mismatch, expected '%s', got '%s'", correctManifestAddrHex, feedManifestHash)
}
// Check we get a not found error when trying to get the resource with a made-up manifest
_, err = client.GetResource(nil, "bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb")
if err != ErrNoResourceUpdatesFound {
t.Fatalf("Expected to receive ErrNoResourceUpdatesFound error. Got: %s", err)
// Check we get a not found error when trying to get feed updates with a made-up manifest
_, err = client.QueryFeed(nil, "bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb")
if err != ErrNoFeedUpdatesFound {
t.Fatalf("Expected to receive ErrNoFeedUpdatesFound error. Got: %s", err)
}
reader, err := client.GetResource(nil, correctManifestAddrHex)
reader, err := client.QueryFeed(nil, correctManifestAddrHex)
if err != nil {
t.Fatalf("Error retrieving resource: %s", err)
t.Fatalf("Error retrieving feed updates: %s", err)
}
defer reader.Close()
gotData, err := ioutil.ReadAll(reader)
@ -435,8 +435,8 @@ func TestClientCreateResourceMultihash(t *testing.T) {
}
// TestClientCreateUpdateResource will check that mutable resources can be created and updated via the HTTP client.
func TestClientCreateUpdateResource(t *testing.T) {
// TestClientCreateUpdateFeed will check that feeds can be created and updated via the HTTP client.
func TestClientCreateUpdateFeed(t *testing.T) {
signer, _ := newTestSigner()
@ -444,28 +444,28 @@ func TestClientCreateUpdateResource(t *testing.T) {
client := NewClient(srv.URL)
defer srv.Close()
// set raw data for the resource
// set raw data for the feed update
databytes := []byte("En un lugar de La Mancha, de cuyo nombre no quiero acordarme...")
// our mutable resource name
topic, _ := mru.NewTopic("El Quijote", nil)
createRequest := mru.NewFirstRequest(topic)
// our feed topic name
topic, _ := feed.NewTopic("El Quijote", nil)
createRequest := feed.NewFirstRequest(topic)
createRequest.SetData(databytes)
if err := createRequest.Sign(signer); err != nil {
t.Fatalf("Error signing update: %s", err)
}
resourceManifestHash, err := client.CreateResource(createRequest)
feedManifestHash, err := client.CreateFeedWithManifest(createRequest)
correctManifestAddrHex := "fcb8e75f53e480e197c083ad1976d265674d0ce776f2bf359c09c413fb5230b8"
if resourceManifestHash != correctManifestAddrHex {
t.Fatalf("Response resource manifest mismatch, expected '%s', got '%s'", correctManifestAddrHex, resourceManifestHash)
correctManifestAddrHex := "0e9b645ebc3da167b1d56399adc3276f7a08229301b72a03336be0e7d4b71882"
if feedManifestHash != correctManifestAddrHex {
t.Fatalf("Response feed manifest mismatch, expected '%s', got '%s'", correctManifestAddrHex, feedManifestHash)
}
reader, err := client.GetResource(nil, correctManifestAddrHex)
reader, err := client.QueryFeed(nil, correctManifestAddrHex)
if err != nil {
t.Fatalf("Error retrieving resource: %s", err)
t.Fatalf("Error retrieving feed updates: %s", err)
}
defer reader.Close()
gotData, err := ioutil.ReadAll(reader)
@ -479,7 +479,7 @@ func TestClientCreateUpdateResource(t *testing.T) {
// define different data
databytes = []byte("... no ha mucho tiempo que vivía un hidalgo de los de lanza en astillero ...")
updateRequest, err := client.GetResourceMetadata(nil, correctManifestAddrHex)
updateRequest, err := client.GetFeedRequest(nil, correctManifestAddrHex)
if err != nil {
t.Fatalf("Error retrieving update request template: %s", err)
}
@ -489,13 +489,13 @@ func TestClientCreateUpdateResource(t *testing.T) {
t.Fatalf("Error signing update: %s", err)
}
if err = client.UpdateResource(updateRequest); err != nil {
t.Fatalf("Error updating resource: %s", err)
if err = client.UpdateFeed(updateRequest); err != nil {
t.Fatalf("Error updating feed: %s", err)
}
reader, err = client.GetResource(nil, correctManifestAddrHex)
reader, err = client.QueryFeed(nil, correctManifestAddrHex)
if err != nil {
t.Fatalf("Error retrieving resource: %s", err)
t.Fatalf("Error retrieving feed updates: %s", err)
}
defer reader.Close()
gotData, err = ioutil.ReadAll(reader)
@ -506,17 +506,17 @@ func TestClientCreateUpdateResource(t *testing.T) {
t.Fatalf("Expected: %v, got %v", databytes, gotData)
}
// now try retrieving resource without a manifest
// now try retrieving feed updates without a manifest
view := &mru.View{
fd := &feed.Feed{
Topic: topic,
User: signer.Address(),
}
lookupParams := mru.NewQueryLatest(view, lookup.NoClue)
reader, err = client.GetResource(lookupParams, "")
lookupParams := feed.NewQueryLatest(fd, lookup.NoClue)
reader, err = client.QueryFeed(lookupParams, "")
if err != nil {
t.Fatalf("Error retrieving resource: %s", err)
t.Fatalf("Error retrieving feed updates: %s", err)
}
defer reader.Close()
gotData, err = ioutil.ReadAll(reader)

132
swarm/api/http/server.go
View File

@ -31,7 +31,6 @@ import (
"net/http"
"os"
"path"
"regexp"
"strconv"
"strings"
"time"
@ -41,7 +40,7 @@ import (
"github.com/ethereum/go-ethereum/swarm/api"
"github.com/ethereum/go-ethereum/swarm/log"
"github.com/ethereum/go-ethereum/swarm/storage"
"github.com/ethereum/go-ethereum/swarm/storage/mru"
"github.com/ethereum/go-ethereum/swarm/storage/feed"
"github.com/rs/cors"
)
@ -145,13 +144,13 @@ func NewServer(api *api.API, corsString string) *Server {
defaultMiddlewares...,
),
})
mux.Handle("/bzz-resource:/", methodHandler{
mux.Handle("/bzz-feed:/", methodHandler{
"GET": Adapt(
http.HandlerFunc(server.HandleGetResource),
http.HandlerFunc(server.HandleGetFeed),
defaultMiddlewares...,
),
"POST": Adapt(
http.HandlerFunc(server.HandlePostResource),
http.HandlerFunc(server.HandlePostFeed),
defaultMiddlewares...,
),
})
@ -458,66 +457,35 @@ func (s *Server) HandleDelete(w http.ResponseWriter, r *http.Request) {
fmt.Fprint(w, newKey)
}
// Parses a resource update post url to corresponding action
// possible combinations:
// / add multihash update to existing hash
// /raw add raw update to existing hash
// /# create new resource with first update as mulitihash
// /raw/# create new resource with first update raw
func resourcePostMode(path string) (isRaw bool, frequency uint64, err error) {
re, err := regexp.Compile("^(raw)?/?([0-9]+)?$")
if err != nil {
return isRaw, frequency, err
}
m := re.FindAllStringSubmatch(path, 2)
var freqstr = "0"
if len(m) > 0 {
if m[0][1] != "" {
isRaw = true
}
if m[0][2] != "" {
freqstr = m[0][2]
}
} else if len(path) > 0 {
return isRaw, frequency, fmt.Errorf("invalid path")
}
frequency, err = strconv.ParseUint(freqstr, 10, 64)
return isRaw, frequency, err
}
// Handles creation of new mutable resources and adding updates to existing mutable resources
// There are two types of updates available, "raw" and "multihash."
// If the latter is used, a subsequent bzz:// GET call to the manifest of the resource will return
// the page that the multihash is pointing to, as if it held a normal swarm content manifest
//
// The POST request admits a JSON structure as defined in the mru package: `mru.updateRequestJSON`
// The requests can be to a) create a resource, b) update a resource or c) both a+b: create a resource and set the initial content
func (s *Server) HandlePostResource(w http.ResponseWriter, r *http.Request) {
// Handles feed manifest creation and feed updates
// The POST request admits a JSON structure as defined in the feeds package: `feed.updateRequestJSON`
// The requests can be to a) create a feed manifest, b) update a feed or c) both a+b: create a feed manifest and publish a first update
func (s *Server) HandlePostFeed(w http.ResponseWriter, r *http.Request) {
ruid := GetRUID(r.Context())
uri := GetURI(r.Context())
log.Debug("handle.post.resource", "ruid", ruid)
log.Debug("handle.post.feed", "ruid", ruid)
var err error
// Creation and update must send mru.updateRequestJSON JSON structure
// Creation and update must send feed.updateRequestJSON JSON structure
body, err := ioutil.ReadAll(r.Body)
if err != nil {
RespondError(w, r, err.Error(), http.StatusInternalServerError)
return
}
view, err := s.api.ResolveResourceView(r.Context(), uri, r.URL.Query())
fd, err := s.api.ResolveFeed(r.Context(), uri, r.URL.Query())
if err != nil { // couldn't parse query string or retrieve manifest
getFail.Inc(1)
httpStatus := http.StatusBadRequest
if err == api.ErrCannotLoadResourceManifest || err == api.ErrCannotResolveResourceURI {
if err == api.ErrCannotLoadFeedManifest || err == api.ErrCannotResolveFeedURI {
httpStatus = http.StatusNotFound
}
RespondError(w, r, fmt.Sprintf("cannot retrieve resource view: %s", err), httpStatus)
RespondError(w, r, fmt.Sprintf("cannot retrieve feed from manifest: %s", err), httpStatus)
return
}
var updateRequest mru.Request
updateRequest.View = *view
var updateRequest feed.Request
updateRequest.Feed = *fd
query := r.URL.Query()
if err := updateRequest.FromValues(query, body); err != nil { // decodes request from query parameters
@ -527,13 +495,13 @@ func (s *Server) HandlePostResource(w http.ResponseWriter, r *http.Request) {
if updateRequest.IsUpdate() {
// Verify that the signature is intact and that the signer is authorized
// to update this resource
// Check this early, to avoid creating a resource and then not being able to set its first update.
// to update this feed
// Check this early, to avoid creating a feed and then not being able to set its first update.
if err = updateRequest.Verify(); err != nil {
RespondError(w, r, err.Error(), http.StatusForbidden)
return
}
_, err = s.api.ResourceUpdate(r.Context(), &updateRequest)
_, err = s.api.FeedsUpdate(r.Context(), &updateRequest)
if err != nil {
RespondError(w, r, err.Error(), http.StatusInternalServerError)
return
@ -541,16 +509,16 @@ func (s *Server) HandlePostResource(w http.ResponseWriter, r *http.Request) {
}
if query.Get("manifest") == "1" {
// we create a manifest so we can retrieve the resource with bzz:// later
// this manifest has a special "resource type" manifest, and saves the
// resource view ID used to retrieve the resource later
m, err := s.api.NewResourceManifest(r.Context(), &updateRequest.View)
// we create a manifest so we can retrieve feed updates with bzz:// later
// this manifest has a special "feed type" manifest, and saves the
// feed identification used to retrieve feed updates later
m, err := s.api.NewFeedManifest(r.Context(), &updateRequest.Feed)
if err != nil {
RespondError(w, r, fmt.Sprintf("failed to create resource manifest: %v", err), http.StatusInternalServerError)
RespondError(w, r, fmt.Sprintf("failed to create feed manifest: %v", err), http.StatusInternalServerError)
return
}
// the key to the manifest will be passed back to the client
// the client can access the view directly through its resourceView member
// the client can access the feed directly through its Feed member
// the manifest key can be set as content in the resolver of the ENS name
outdata, err := json.Marshal(m)
if err != nil {
@ -563,41 +531,49 @@ func (s *Server) HandlePostResource(w http.ResponseWriter, r *http.Request) {
}
}
// Retrieve mutable resource updates:
// bzz-resource://<id> - get latest update
// bzz-resource://<id>/?period=n - get latest update on period n
// bzz-resource://<id>/?period=n&version=m - get update version m of period n
// bzz-resource://<id>/meta - get metadata and next version information
// <id> = ens name or hash
// TODO: Enable pass maxPeriod parameter
func (s *Server) HandleGetResource(w http.ResponseWriter, r *http.Request) {
// HandleGetFeed retrieves Swarm feeds updates:
// bzz-feed://<manifest address or ENS name> - get latest feed update, given a manifest address
// - or -
// specify user + topic (optional), subtopic name (optional) directly, without manifest:
// bzz-feed://?user=0x...&topic=0x...&name=subtopic name
// topic defaults to 0x000... if not specified.
// name defaults to empty string if not specified.
// thus, empty name and topic refers to the user's default feed.
//
// Optional parameters:
// time=xx - get the latest update before time (in epoch seconds)
// hint.time=xx - hint the lookup algorithm looking for updates at around that time
// hint.level=xx - hint the lookup algorithm looking for updates at around this frequency level
// meta=1 - get feed metadata and status information instead of performing a feed query
// NOTE: meta=1 will be deprecated in the near future
func (s *Server) HandleGetFeed(w http.ResponseWriter, r *http.Request) {
ruid := GetRUID(r.Context())
uri := GetURI(r.Context())
log.Debug("handle.get.resource", "ruid", ruid)
log.Debug("handle.get.feed", "ruid", ruid)
var err error
view, err := s.api.ResolveResourceView(r.Context(), uri, r.URL.Query())
fd, err := s.api.ResolveFeed(r.Context(), uri, r.URL.Query())
if err != nil { // couldn't parse query string or retrieve manifest
getFail.Inc(1)
httpStatus := http.StatusBadRequest
if err == api.ErrCannotLoadResourceManifest || err == api.ErrCannotResolveResourceURI {
if err == api.ErrCannotLoadFeedManifest || err == api.ErrCannotResolveFeedURI {
httpStatus = http.StatusNotFound
}
RespondError(w, r, fmt.Sprintf("cannot retrieve resource view: %s", err), httpStatus)
RespondError(w, r, fmt.Sprintf("cannot retrieve feed information from manifest: %s", err), httpStatus)
return
}
// determine if the query specifies period and version or it is a metadata query
if r.URL.Query().Get("meta") == "1" {
unsignedUpdateRequest, err := s.api.ResourceNewRequest(r.Context(), view)
unsignedUpdateRequest, err := s.api.FeedsNewRequest(r.Context(), fd)
if err != nil {
getFail.Inc(1)
RespondError(w, r, fmt.Sprintf("cannot retrieve resource metadata for view=%s: %s", view.Hex(), err), http.StatusNotFound)
RespondError(w, r, fmt.Sprintf("cannot retrieve feed metadata for feed=%s: %s", fd.Hex(), err), http.StatusNotFound)
return
}
rawResponse, err := unsignedUpdateRequest.MarshalJSON()
if err != nil {
RespondError(w, r, fmt.Sprintf("cannot encode unsigned UpdateRequest: %v", err), http.StatusInternalServerError)
RespondError(w, r, fmt.Sprintf("cannot encode unsigned feed update request: %v", err), http.StatusInternalServerError)
return
}
w.Header().Add("Content-type", "application/json")
@ -606,31 +582,31 @@ func (s *Server) HandleGetResource(w http.ResponseWriter, r *http.Request) {
return
}
lookupParams := &mru.Query{View: *view}
lookupParams := &feed.Query{Feed: *fd}
if err = lookupParams.FromValues(r.URL.Query()); err != nil { // parse period, version
RespondError(w, r, fmt.Sprintf("invalid mutable resource request:%s", err), http.StatusBadRequest)
RespondError(w, r, fmt.Sprintf("invalid feed update request:%s", err), http.StatusBadRequest)
return
}
data, err := s.api.ResourceLookup(r.Context(), lookupParams)
data, err := s.api.FeedsLookup(r.Context(), lookupParams)
// any error from the switch statement will end up here
if err != nil {
code, err2 := s.translateResourceError(w, r, "mutable resource lookup fail", err)
code, err2 := s.translateFeedError(w, r, "feed lookup fail", err)
RespondError(w, r, err2.Error(), code)
return
}
// All ok, serve the retrieved update
log.Debug("Found update", "view", view.Hex(), "ruid", ruid)
log.Debug("Found update", "feed", fd.Hex(), "ruid", ruid)
w.Header().Set("Content-Type", api.MimeOctetStream)
http.ServeContent(w, r, "", time.Now(), bytes.NewReader(data))
}
func (s *Server) translateResourceError(w http.ResponseWriter, r *http.Request, supErr string, err error) (int, error) {
func (s *Server) translateFeedError(w http.ResponseWriter, r *http.Request, supErr string, err error) (int, error) {
code := 0
defaultErr := fmt.Errorf("%s: %v", supErr, err)
rsrcErr, ok := err.(*mru.Error)
rsrcErr, ok := err.(*feed.Error)
if !ok && rsrcErr != nil {
code = rsrcErr.Code()
}

123
swarm/api/http/server_test.go
View File

@ -38,7 +38,7 @@ import (
"testing"
"time"
"github.com/ethereum/go-ethereum/swarm/storage/mru/lookup"
"github.com/ethereum/go-ethereum/swarm/storage/feed/lookup"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/types"
@ -48,7 +48,7 @@ import (
swarm "github.com/ethereum/go-ethereum/swarm/api/client"
"github.com/ethereum/go-ethereum/swarm/multihash"
"github.com/ethereum/go-ethereum/swarm/storage"
"github.com/ethereum/go-ethereum/swarm/storage/mru"
"github.com/ethereum/go-ethereum/swarm/storage/feed"
"github.com/ethereum/go-ethereum/swarm/testutil"
)
@ -58,65 +58,24 @@ func init() {
log.Root().SetHandler(log.CallerFileHandler(log.LvlFilterHandler(log.Lvl(*loglevel), log.StreamHandler(os.Stderr, log.TerminalFormat(true)))))
}
func TestResourcePostMode(t *testing.T) {
path := ""
errstr := "resourcePostMode for '%s' should be raw %v frequency %d, was raw %v, frequency %d"
r, f, err := resourcePostMode(path)
if err != nil {
t.Fatal(err)
} else if r || f != 0 {
t.Fatalf(errstr, path, false, 0, r, f)
}
path = "raw"
r, f, err = resourcePostMode(path)
if err != nil {
t.Fatal(err)
} else if !r || f != 0 {
t.Fatalf(errstr, path, true, 0, r, f)
}
path = "13"
r, f, err = resourcePostMode(path)
if err != nil {
t.Fatal(err)
} else if r || f == 0 {
t.Fatalf(errstr, path, false, 13, r, f)
}
path = "raw/13"
r, f, err = resourcePostMode(path)
if err != nil {
t.Fatal(err)
} else if !r || f == 0 {
t.Fatalf(errstr, path, true, 13, r, f)
}
path = "foo/13"
r, f, err = resourcePostMode(path)
if err == nil {
t.Fatal("resourcePostMode for 'foo/13' should fail, returned error nil")
}
}
func serverFunc(api *api.API) testutil.TestServer {
return NewServer(api, "")
}
func newTestSigner() (*mru.GenericSigner, error) {
func newTestSigner() (*feed.GenericSigner, error) {
privKey, err := crypto.HexToECDSA("deadbeefdeadbeefdeadbeefdeadbeefdeadbeefdeadbeefdeadbeefdeadbeef")
if err != nil {
return nil, err
}
return mru.NewGenericSigner(privKey), nil
return feed.NewGenericSigner(privKey), nil
}
// test the transparent resolving of multihash resource types with bzz:// scheme
// test the transparent resolving of multihash-containing feed updates with bzz:// scheme
//
// first upload data, and store the multihash to the resulting manifest in a resource update
// first upload data, and store the multihash to the resulting manifest in a feed update
// retrieving the update with the multihash should return the manifest pointing directly to the data
// and raw retrieve of that hash should return the data
func TestBzzResourceMultihash(t *testing.T) {
func TestBzzFeedMultihash(t *testing.T) {
signer, _ := newTestSigner()
@ -144,8 +103,8 @@ func TestBzzResourceMultihash(t *testing.T) {
log.Info("added data", "manifest", string(b), "data", common.ToHex(mh))
topic, _ := mru.NewTopic("foo.eth", nil)
updateRequest := mru.NewFirstRequest(topic)
topic, _ := feed.NewTopic("foo.eth", nil)
updateRequest := feed.NewFirstRequest(topic)
updateRequest.SetData(mh)
@ -154,7 +113,7 @@ func TestBzzResourceMultihash(t *testing.T) {
}
log.Info("added data", "manifest", string(b), "data", common.ToHex(mh))
testUrl, err := url.Parse(fmt.Sprintf("%s/bzz-resource:/", srv.URL))
testUrl, err := url.Parse(fmt.Sprintf("%s/bzz-feed:/", srv.URL))
if err != nil {
t.Fatal(err)
}
@ -182,12 +141,12 @@ func TestBzzResourceMultihash(t *testing.T) {
t.Fatalf("data %s could not be unmarshaled: %v", b, err)
}
correctManifestAddrHex := "6ef40ba1492cf2a029dc9a8b5896c822cf689d3cd010842f4f1744e6db8824bd"
correctManifestAddrHex := "bb056a5264c295c2b0f613c8409b9c87ce9d71576ace02458160df4cc894210b"
if rsrcResp.Hex() != correctManifestAddrHex {
t.Fatalf("Response resource key mismatch, expected '%s', got '%s'", correctManifestAddrHex, rsrcResp.Hex())
t.Fatalf("Response feed manifest address mismatch, expected '%s', got '%s'", correctManifestAddrHex, rsrcResp.Hex())
}
// get bzz manifest transparent resource resolve
// get bzz manifest transparent feed update resolve
testBzzUrl = fmt.Sprintf("%s/bzz:/%s", srv.URL, rsrcResp)
resp, err = http.Get(testBzzUrl)
if err != nil {
@ -206,8 +165,8 @@ func TestBzzResourceMultihash(t *testing.T) {
}
}
// Test resource updates using the raw update methods
func TestBzzResource(t *testing.T) {
// Test Swarm feeds using the raw update methods
func TestBzzFeed(t *testing.T) {
srv := testutil.NewTestSwarmServer(t, serverFunc, nil)
signer, _ := newTestSigner()
@ -223,8 +182,8 @@ func TestBzzResource(t *testing.T) {
//data for update 2
update2Data := []byte("foo")
topic, _ := mru.NewTopic("foo.eth", nil)
updateRequest := mru.NewFirstRequest(topic)
topic, _ := feed.NewTopic("foo.eth", nil)
updateRequest := feed.NewFirstRequest(topic)
if err != nil {
t.Fatal(err)
}
@ -234,8 +193,8 @@ func TestBzzResource(t *testing.T) {
t.Fatal(err)
}
// creates resource and sets update 1
testUrl, err := url.Parse(fmt.Sprintf("%s/bzz-resource:/", srv.URL))
// creates feed and sets update 1
testUrl, err := url.Parse(fmt.Sprintf("%s/bzz-feed:/", srv.URL))
if err != nil {
t.Fatal(err)
}
@ -262,9 +221,9 @@ func TestBzzResource(t *testing.T) {
t.Fatalf("data %s could not be unmarshaled: %v", b, err)
}
correctManifestAddrHex := "6ef40ba1492cf2a029dc9a8b5896c822cf689d3cd010842f4f1744e6db8824bd"
correctManifestAddrHex := "bb056a5264c295c2b0f613c8409b9c87ce9d71576ace02458160df4cc894210b"
if rsrcResp.Hex() != correctManifestAddrHex {
t.Fatalf("Response resource manifest mismatch, expected '%s', got '%s'", correctManifestAddrHex, rsrcResp.Hex())
t.Fatalf("Response feed manifest mismatch, expected '%s', got '%s'", correctManifestAddrHex, rsrcResp.Hex())
}
// get the manifest
@ -289,12 +248,12 @@ func TestBzzResource(t *testing.T) {
if len(manifest.Entries) != 1 {
t.Fatalf("Manifest has %d entries", len(manifest.Entries))
}
correctViewHex := "0x666f6f2e65746800000000000000000000000000000000000000000000000000c96aaa54e2d44c299564da76e1cd3184a2386b8d"
if manifest.Entries[0].ResourceView.Hex() != correctViewHex {
t.Fatalf("Expected manifest Resource View '%s', got '%s'", correctViewHex, manifest.Entries[0].ResourceView.Hex())
correctFeedHex := "0x666f6f2e65746800000000000000000000000000000000000000000000000000c96aaa54e2d44c299564da76e1cd3184a2386b8d"
if manifest.Entries[0].Feed.Hex() != correctFeedHex {
t.Fatalf("Expected manifest Feed '%s', got '%s'", correctFeedHex, manifest.Entries[0].Feed.Hex())
}
// get bzz manifest transparent resource resolve
// get bzz manifest transparent feed update resolve
testBzzUrl := fmt.Sprintf("%s/bzz:/%s", srv.URL, rsrcResp)
resp, err = http.Get(testBzzUrl)
if err != nil {
@ -302,7 +261,7 @@ func TestBzzResource(t *testing.T) {
}
defer resp.Body.Close()
if resp.StatusCode == http.StatusOK {
t.Fatal("Expected error status since resource is not multihash. Received 200 OK")
t.Fatal("Expected error status since feed update does not contain multihash. Received 200 OK")
}
b, err = ioutil.ReadAll(resp.Body)
if err != nil {
@ -310,21 +269,21 @@ func TestBzzResource(t *testing.T) {
}
// get non-existent name, should fail
testBzzResUrl := fmt.Sprintf("%s/bzz-resource:/bar", srv.URL)
testBzzResUrl := fmt.Sprintf("%s/bzz-feed:/bar", srv.URL)
resp, err = http.Get(testBzzResUrl)
if err != nil {
t.Fatal(err)
}
if resp.StatusCode != http.StatusNotFound {
t.Fatalf("Expected get non-existent resource to fail with StatusNotFound (404), got %d", resp.StatusCode)
t.Fatalf("Expected get non-existent feed manifest to fail with StatusNotFound (404), got %d", resp.StatusCode)
}
resp.Body.Close()
// get latest update (1.1) through resource directly
// get latest update through bzz-feed directly
log.Info("get update latest = 1.1", "addr", correctManifestAddrHex)
testBzzResUrl = fmt.Sprintf("%s/bzz-resource:/%s", srv.URL, correctManifestAddrHex)
testBzzResUrl = fmt.Sprintf("%s/bzz-feed:/%s", srv.URL, correctManifestAddrHex)
resp, err = http.Get(testBzzResUrl)
if err != nil {
t.Fatal(err)
@ -346,29 +305,29 @@ func TestBzzResource(t *testing.T) {
srv.CurrentTime++
log.Info("update 2")
// 1.- get metadata about this resource
testBzzResUrl = fmt.Sprintf("%s/bzz-resource:/%s/", srv.URL, correctManifestAddrHex)
// 1.- get metadata about this feed
testBzzResUrl = fmt.Sprintf("%s/bzz-feed:/%s/", srv.URL, correctManifestAddrHex)
resp, err = http.Get(testBzzResUrl + "?meta=1")
if err != nil {
t.Fatal(err)
}
defer resp.Body.Close()
if resp.StatusCode != http.StatusOK {
t.Fatalf("Get resource metadata returned %s", resp.Status)
t.Fatalf("Get feed metadata returned %s", resp.Status)
}
b, err = ioutil.ReadAll(resp.Body)
if err != nil {
t.Fatal(err)
}
updateRequest = &mru.Request{}
updateRequest = &feed.Request{}
if err = updateRequest.UnmarshalJSON(b); err != nil {
t.Fatalf("Error decoding resource metadata: %s", err)
t.Fatalf("Error decoding feed metadata: %s", err)
}
updateRequest.SetData(update2Data)
if err = updateRequest.Sign(signer); err != nil {
t.Fatal(err)
}
testUrl, err = url.Parse(fmt.Sprintf("%s/bzz-resource:/", srv.URL))
testUrl, err = url.Parse(fmt.Sprintf("%s/bzz-feed:/", srv.URL))
if err != nil {
t.Fatal(err)
}
@ -385,9 +344,9 @@ func TestBzzResource(t *testing.T) {
t.Fatalf("Update returned %s", resp.Status)
}
// get latest update (1.2) through resource directly
// get latest update through bzz-feed directly
log.Info("get update 1.2")
testBzzResUrl = fmt.Sprintf("%s/bzz-resource:/%s", srv.URL, correctManifestAddrHex)
testBzzResUrl = fmt.Sprintf("%s/bzz-feed:/%s", srv.URL, correctManifestAddrHex)
resp, err = http.Get(testBzzResUrl)
if err != nil {
t.Fatal(err)
@ -406,15 +365,15 @@ func TestBzzResource(t *testing.T) {
// test manifest-less queries
log.Info("get first update in update1Timestamp via direct query")
query := mru.NewQuery(&updateRequest.View, update1Timestamp, lookup.NoClue)
query := feed.NewQuery(&updateRequest.Feed, update1Timestamp, lookup.NoClue)
urlq, err := url.Parse(fmt.Sprintf("%s/bzz-resource:/", srv.URL))
urlq, err := url.Parse(fmt.Sprintf("%s/bzz-feed:/", srv.URL))
if err != nil {
t.Fatal(err)
}
values := urlq.Query()
query.AppendValues(values) // this adds view query parameters
query.AppendValues(values) // this adds feed query parameters
urlq.RawQuery = values.Encode()
resp, err = http.Get(urlq.String())
if err != nil {

32
swarm/api/manifest.go
View File

@ -27,7 +27,7 @@ import (
"strings"
"time"
"github.com/ethereum/go-ethereum/swarm/storage/mru"
"github.com/ethereum/go-ethereum/swarm/storage/feed"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/swarm/log"
@ -35,8 +35,8 @@ import (
)
const (
ManifestType = "application/bzz-manifest+json"
ResourceContentType = "application/bzz-resource"
ManifestType = "application/bzz-manifest+json"
FeedContentType = "application/bzz-feed"
manifestSizeLimit = 5 * 1024 * 1024
)
@ -48,15 +48,15 @@ type Manifest struct {
// ManifestEntry represents an entry in a swarm manifest
type ManifestEntry struct {
Hash string `json:"hash,omitempty"`
Path string `json:"path,omitempty"`
ContentType string `json:"contentType,omitempty"`
Mode int64 `json:"mode,omitempty"`
Size int64 `json:"size,omitempty"`
ModTime time.Time `json:"mod_time,omitempty"`
Status int `json:"status,omitempty"`
Access *AccessEntry `json:"access,omitempty"`
ResourceView *mru.View `json:"resourceView,omitempty"`
Hash string `json:"hash,omitempty"`
Path string `json:"path,omitempty"`
ContentType string `json:"contentType,omitempty"`
Mode int64 `json:"mode,omitempty"`
Size int64 `json:"size,omitempty"`
ModTime time.Time `json:"mod_time,omitempty"`
Status int `json:"status,omitempty"`
Access *AccessEntry `json:"access,omitempty"`
Feed *feed.Feed `json:"feed,omitempty"`
}
// ManifestList represents the result of listing files in a manifest
@ -80,13 +80,13 @@ func (a *API) NewManifest(ctx context.Context, toEncrypt bool) (storage.Address,
return addr, err
}
// Manifest hack for supporting Mutable Resource Updates from the bzz: scheme
// Manifest hack for supporting Swarm feeds from the bzz: scheme
// see swarm/api/api.go:API.Get() for more information
func (a *API) NewResourceManifest(ctx context.Context, view *mru.View) (storage.Address, error) {
func (a *API) NewFeedManifest(ctx context.Context, feed *feed.Feed) (storage.Address, error) {
var manifest Manifest
entry := ManifestEntry{
ResourceView: view,
ContentType: ResourceContentType,
Feed: feed,
ContentType: FeedContentType,
}
manifest.Entries = append(manifest.Entries, entry)
data, err := json.Marshal(&manifest)

6
swarm/api/uri.go
View File

@ -86,7 +86,7 @@ func Parse(rawuri string) (*URI, error) {
// check the scheme is valid
switch uri.Scheme {
case "bzz", "bzz-raw", "bzz-immutable", "bzz-list", "bzz-hash", "bzz-resource":
case "bzz", "bzz-raw", "bzz-immutable", "bzz-list", "bzz-hash", "bzz-feed":
default:
return nil, fmt.Errorf("unknown scheme %q", u.Scheme)
}
@ -108,8 +108,8 @@ func Parse(rawuri string) (*URI, error) {
}
return uri, nil
}
func (u *URI) Resource() bool {
return u.Scheme == "bzz-resource"
func (u *URI) Feed() bool {
return u.Scheme == "bzz-feed"
}
func (u *URI) Raw() bool {

4
swarm/network/README.md
View File

@ -37,7 +37,7 @@ Using the streamer logic, various stream types are easy to implement:
* live session syncing
* historical syncing
* simple retrieve requests and deliveries
* mutable resource updates streams
* swarm feeds streams
* receipting for finger pointing
## Syncing
@ -57,7 +57,7 @@ receipts for a deleted chunk easily to refute their challenge.
- syncing should be resilient to cut connections, metadata should be persisted that
keep track of syncing state across sessions, historical syncing state should survive restart
- extra data structures to support syncing should be kept at minimum
- syncing is organized separately for chunk types (resource update v content chunk)
- syncing is not organized separately for chunk types (Swarm feed updates v regular content chunk)
- various types of streams should have common logic abstracted
Syncing is now entirely mediated by the localstore, ie., no processes or memory leaks due to network contention.

2
swarm/pss/notify/notify.go
View File

@ -317,7 +317,7 @@ func (c *Controller) handleStartMsg(msg *Msg, keyid string) (err error) {
return err
}
// TODO this is set to zero-length byte pending decision on protocol for initial message, whether it should include message or not, and how to trigger the initial message so that current state of MRU is sent upon subscription
// TODO this is set to zero-length byte pending decision on protocol for initial message, whether it should include message or not, and how to trigger the initial message so that current state of Swarm feed is sent upon subscription
notify := []byte{}
replyMsg := NewMsg(MsgCodeNotifyWithKey, msg.namestring, make([]byte, len(notify)+symKeyLength))
copy(replyMsg.Payload, notify)

2
swarm/storage/mru/binaryserializer.go → swarm/storage/feed/binaryserializer.go
View File

@ -14,7 +14,7 @@
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package mru
package feed
import "github.com/ethereum/go-ethereum/common/hexutil"

2
swarm/storage/mru/binaryserializer_test.go → swarm/storage/feed/binaryserializer_test.go
View File

@ -14,7 +14,7 @@
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package mru
package feed
import (
"encoding/json"

14
swarm/storage/mru/cacheentry.go → swarm/storage/feed/cacheentry.go
View File

@ -14,7 +14,7 @@
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package mru
package feed
import (
"bytes"
@ -26,23 +26,23 @@ import (
const (
hasherCount = 8
resourceHashAlgorithm = storage.SHA3Hash
feedsHashAlgorithm = storage.SHA3Hash
defaultRetrieveTimeout = 100 * time.Millisecond
)
// cacheEntry caches resource data and the metadata of its root chunk.
// cacheEntry caches the last known update of a specific Swarm feed.
type cacheEntry struct {
ResourceUpdate
Update
*bytes.Reader
lastKey storage.Address
}
// implements storage.LazySectionReader
func (r *cacheEntry) Size(ctx context.Context, _ chan bool) (int64, error) {
return int64(len(r.ResourceUpdate.data)), nil
return int64(len(r.Update.data)), nil
}
//returns the resource's topic
//returns the feed's topic
func (r *cacheEntry) Topic() Topic {
return r.View.Topic
return r.Feed.Topic
}

43
swarm/storage/feed/doc.go Normal file
View File

@ -0,0 +1,43 @@
/*
Package feeds defines Swarm Feeds.
Swarm Feeds allows a user to build an update feed about a particular topic
without resorting to ENS on each update.
The update scheme is built on swarm chunks with chunk keys following
a predictable, versionable pattern.
A Feed is tied to a unique identifier that is deterministically generated out of
the chosen topic.
A Feed is defined as the series of updates of a specific user about a particular topic
Actual data updates are also made in the form of swarm chunks. The keys
of the updates are the hash of a concatenation of properties as follows:
updateAddr = H(Feed, Epoch ID)
where H is the SHA3 hash function
Feed is the combination of Topic and the user address
Epoch ID is a time slot. See the lookup package for more information.
A user looking up a the latest update in a Feed only needs to know the Topic
and the other user's address.
The Feed Update data is:
updatedata = Feed|Epoch|data
The full update data that goes in the chunk payload is:
updatedata|sign(updatedata)
Structure Summary:
Request: Feed Update with signature
Update: headers + data
Header: Protocol version and reserved for future use placeholders
ID: Information about how to locate a specific update
Feed: Represents a user's series of publications about a specific Topic
Topic: Item that the updates are about
User: User who updates the Feed
Epoch: time slot where the update is stored
*/
package feed

8
swarm/storage/mru/error.go → swarm/storage/feed/error.go
View File

@ -14,7 +14,7 @@
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package mru
package feed
import (
"fmt"
@ -35,7 +35,7 @@ const (
ErrCnt
)
// Error is a the typed error object used for Mutable Resources
// Error is a the typed error object used for Swarm feeds
type Error struct {
code int
err string
@ -47,12 +47,12 @@ func (e *Error) Error() string {
}
// Code returns the error code
// Error codes are enumerated in the error.go file within the mru package
// Error codes are enumerated in the error.go file within the feeds package
func (e *Error) Code() int {
return e.code
}
// NewError creates a new Mutable Resource Error object with the specified code and custom error message
// NewError creates a new Swarm feeds Error object with the specified code and custom error message
func NewError(code int, s string) error {
if code < 0 || code >= ErrCnt {
panic("no such error code!")

66
swarm/storage/mru/view.go → swarm/storage/feed/feed.go
View File

@ -14,7 +14,7 @@
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package mru
package feed
import (
"hash"
@ -25,21 +25,21 @@ import (
"github.com/ethereum/go-ethereum/swarm/storage"
)
// View represents a particular user's view of a resource
type View struct {
// Feed represents a particular user's stream of updates on a topic
type Feed struct {
Topic Topic `json:"topic"`
User common.Address `json:"user"`
}
// View layout:
// Feed layout:
// TopicLength bytes
// userAddr common.AddressLength bytes
const viewLength = TopicLength + common.AddressLength
const feedLength = TopicLength + common.AddressLength
// mapKey calculates a unique id for this view for the cache map in `Handler`
func (u *View) mapKey() uint64 {
serializedData := make([]byte, viewLength)
u.binaryPut(serializedData)
// mapKey calculates a unique id for this feed. Used by the cache map in `Handler`
func (f *Feed) mapKey() uint64 {
serializedData := make([]byte, feedLength)
f.binaryPut(serializedData)
hasher := hashPool.Get().(hash.Hash)
defer hashPool.Put(hasher)
hasher.Reset()
@ -48,55 +48,55 @@ func (u *View) mapKey() uint64 {
return *(*uint64)(unsafe.Pointer(&hash[0]))
}
// binaryPut serializes this View instance into the provided slice
func (u *View) binaryPut(serializedData []byte) error {
if len(serializedData) != viewLength {
return NewErrorf(ErrInvalidValue, "Incorrect slice size to serialize View. Expected %d, got %d", viewLength, len(serializedData))
// binaryPut serializes this feed instance into the provided slice
func (f *Feed) binaryPut(serializedData []byte) error {
if len(serializedData) != feedLength {
return NewErrorf(ErrInvalidValue, "Incorrect slice size to serialize feed. Expected %d, got %d", feedLength, len(serializedData))
}
var cursor int
copy(serializedData[cursor:cursor+TopicLength], u.Topic[:TopicLength])
copy(serializedData[cursor:cursor+TopicLength], f.Topic[:TopicLength])
cursor += TopicLength
copy(serializedData[cursor:cursor+common.AddressLength], u.User[:])
copy(serializedData[cursor:cursor+common.AddressLength], f.User[:])
cursor += common.AddressLength
return nil
}
// binaryLength returns the expected size of this structure when serialized
func (u *View) binaryLength() int {
return viewLength
func (f *Feed) binaryLength() int {
return feedLength
}
// binaryGet restores the current instance from the information contained in the passed slice
func (u *View) binaryGet(serializedData []byte) error {
if len(serializedData) != viewLength {
return NewErrorf(ErrInvalidValue, "Incorrect slice size to read View. Expected %d, got %d", viewLength, len(serializedData))
func (f *Feed) binaryGet(serializedData []byte) error {
if len(serializedData) != feedLength {
return NewErrorf(ErrInvalidValue, "Incorrect slice size to read feed. Expected %d, got %d", feedLength, len(serializedData))
}
var cursor int
copy(u.Topic[:], serializedData[cursor:cursor+TopicLength])
copy(f.Topic[:], serializedData[cursor:cursor+TopicLength])
cursor += TopicLength
copy(u.User[:], serializedData[cursor:cursor+common.AddressLength])
copy(f.User[:], serializedData[cursor:cursor+common.AddressLength])
cursor += common.AddressLength
return nil
}
// Hex serializes the View to a hex string
func (u *View) Hex() string {
serializedData := make([]byte, viewLength)
u.binaryPut(serializedData)
// Hex serializes the feed to a hex string
func (f *Feed) Hex() string {
serializedData := make([]byte, feedLength)
f.binaryPut(serializedData)
return hexutil.Encode(serializedData)
}
// FromValues deserializes this instance from a string key-value store
// useful to parse query strings
func (u *View) FromValues(values Values) (err error) {
func (f *Feed) FromValues(values Values) (err error) {
topic := values.Get("topic")
if topic != "" {
if err := u.Topic.FromHex(values.Get("topic")); err != nil {
if err := f.Topic.FromHex(values.Get("topic")); err != nil {
return err
}
} else { // see if the user set name and relatedcontent
@ -108,18 +108,18 @@ func (u *View) FromValues(values Values) (err error) {
}
relatedContent = relatedContent[:storage.AddressLength]
}
u.Topic, err = NewTopic(name, relatedContent)
f.Topic, err = NewTopic(name, relatedContent)
if err != nil {
return err
}
}
u.User = common.HexToAddress(values.Get("user"))
f.User = common.HexToAddress(values.Get("user"))
return nil
}
// AppendValues serializes this structure into the provided string key-value store
// useful to build query strings
func (u *View) AppendValues(values Values) {
values.Set("topic", u.Topic.Hex())
values.Set("user", u.User.Hex())
func (f *Feed) AppendValues(values Values) {
values.Set("topic", f.Topic.Hex())
values.Set("user", f.User.Hex())
}

14
swarm/storage/mru/view_test.go → swarm/storage/feed/feed_test.go
View File

@ -13,24 +13,24 @@
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package mru
package feed
import (
"testing"
)
func getTestView() *View {
func getTestFeed() *Feed {
topic, _ := NewTopic("world news report, every hour", nil)
return &View{
return &Feed{
Topic: topic,
User: newCharlieSigner().Address(),
}
}
func TestViewSerializerDeserializer(t *testing.T) {
testBinarySerializerRecovery(t, getTestView(), "0x776f726c64206e657773207265706f72742c20657665727920686f7572000000876a8936a7cd0b79ef0735ad0896c1afe278781c")
func TestFeedSerializerDeserializer(t *testing.T) {
testBinarySerializerRecovery(t, getTestFeed(), "0x776f726c64206e657773207265706f72742c20657665727920686f7572000000876a8936a7cd0b79ef0735ad0896c1afe278781c")
}
func TestMetadataSerializerLengthCheck(t *testing.T) {
testBinarySerializerLengthCheck(t, getTestView())
func TestFeedSerializerLengthCheck(t *testing.T) {
testBinarySerializerLengthCheck(t, getTestFeed())
}

175
swarm/storage/mru/handler.go → swarm/storage/feed/handler.go
View File

@ -14,9 +14,9 @@
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
// Handler is the API for Mutable Resources
// It enables creating, updating, syncing and retrieving resources and their update data
package mru
// Handler is the API for feeds
// It enables creating, updating, syncing and retrieving feed updates and their data
package feed
import (
"bytes"
@ -25,7 +25,7 @@ import (
"sync"
"time"
"github.com/ethereum/go-ethereum/swarm/storage/mru/lookup"
"github.com/ethereum/go-ethereum/swarm/storage/feed/lookup"
"github.com/ethereum/go-ethereum/swarm/log"
"github.com/ethereum/go-ethereum/swarm/storage"
@ -34,8 +34,8 @@ import (
type Handler struct {
chunkStore *storage.NetStore
HashSize int
resources map[uint64]*cacheEntry
resourceLock sync.RWMutex
cache map[uint64]*cacheEntry
cacheLock sync.RWMutex
storeTimeout time.Duration
queryMaxPeriods uint32
}
@ -52,35 +52,35 @@ var hashPool sync.Pool
func init() {
hashPool = sync.Pool{
New: func() interface{} {
return storage.MakeHashFunc(resourceHashAlgorithm)()
return storage.MakeHashFunc(feedsHashAlgorithm)()
},
}
}
// NewHandler creates a new Mutable Resource API
// NewHandler creates a new Swarm feeds API
func NewHandler(params *HandlerParams) *Handler {
rh := &Handler{
resources: make(map[uint64]*cacheEntry),
fh := &Handler{
cache: make(map[uint64]*cacheEntry),
}
for i := 0; i < hasherCount; i++ {
hashfunc := storage.MakeHashFunc(resourceHashAlgorithm)()
if rh.HashSize == 0 {
rh.HashSize = hashfunc.Size()
hashfunc := storage.MakeHashFunc(feedsHashAlgorithm)()
if fh.HashSize == 0 {
fh.HashSize = hashfunc.Size()
}
hashPool.Put(hashfunc)
}
return rh
return fh
}
// SetStore sets the store backend for the Mutable Resource API
// SetStore sets the store backend for the Swarm feeds API
func (h *Handler) SetStore(store *storage.NetStore) {
h.chunkStore = store
}
// Validate is a chunk validation method
// If it looks like a resource update, the chunk address is checked against the userAddr of the update's signature
// If it looks like a feed update, the chunk address is checked against the userAddr of the update's signature
// It implements the storage.ChunkValidator interface
func (h *Handler) Validate(chunkAddr storage.Address, data []byte) bool {
dataLength := len(data)
@ -89,67 +89,67 @@ func (h *Handler) Validate(chunkAddr storage.Address, data []byte) bool {
}
// check if it is a properly formatted update chunk with
// valid signature and proof of ownership of the resource it is trying
// valid signature and proof of ownership of the feed it is trying
// to update
// First, deserialize the chunk
var r Request
if err := r.fromChunk(chunkAddr, data); err != nil {
log.Debug("Invalid resource chunk", "addr", chunkAddr.Hex(), "err", err.Error())
log.Debug("Invalid feed update chunk", "addr", chunkAddr.Hex(), "err", err.Error())
return false
}
// Verify signatures and that the signer actually owns the resource
// Verify signatures and that the signer actually owns the feed
// If it fails, it means either the signature is not valid, data is corrupted
// or someone is trying to update someone else's resource.
// or someone is trying to update someone else's feed.
if err := r.Verify(); err != nil {
log.Debug("Invalid signature", "err", err)
log.Debug("Invalid feed update signature", "err", err)
return false
}
return true
}
// GetContent retrieves the data payload of the last synced update of the Mutable Resource
func (h *Handler) GetContent(view *View) (storage.Address, []byte, error) {
if view == nil {
return nil, nil, NewError(ErrInvalidValue, "view is nil")
// GetContent retrieves the data payload of the last synced update of the feed
func (h *Handler) GetContent(feed *Feed) (storage.Address, []byte, error) {
if feed == nil {
return nil, nil, NewError(ErrInvalidValue, "feed is nil")
}
rsrc := h.get(view)
if rsrc == nil {
return nil, nil, NewError(ErrNotFound, "resource does not exist")
feedUpdate := h.get(feed)
if feedUpdate == nil {
return nil, nil, NewError(ErrNotFound, "feed update not cached")
}
return rsrc.lastKey, rsrc.data, nil
return feedUpdate.lastKey, feedUpdate.data, nil
}
// NewRequest prepares a Request structure with all the necessary information to
// just add the desired data and sign it.
// The resulting structure can then be signed and passed to Handler.Update to be verified and sent
func (h *Handler) NewRequest(ctx context.Context, view *View) (request *Request, err error) {
if view == nil {
return nil, NewError(ErrInvalidValue, "view cannot be nil")
func (h *Handler) NewRequest(ctx context.Context, feed *Feed) (request *Request, err error) {
if feed == nil {
return nil, NewError(ErrInvalidValue, "feed cannot be nil")
}
now := TimestampProvider.Now().Time
request = new(Request)
request.Header.Version = ProtocolVersion
query := NewQueryLatest(view, lookup.NoClue)
query := NewQueryLatest(feed, lookup.NoClue)
rsrc, err := h.Lookup(ctx, query)
feedUpdate, err := h.Lookup(ctx, query)
if err != nil {
if err.(*Error).code != ErrNotFound {
return nil, err
}
// not finding updates means that there is a network error
// or that the resource really does not have updates
// or that the feed really does not have updates
}
request.View = *view
request.Feed = *feed
// if we already have an update, then find next epoch
if rsrc != nil {
request.Epoch = lookup.GetNextEpoch(rsrc.Epoch, now)
if feedUpdate != nil {
request.Epoch = lookup.GetNextEpoch(feedUpdate.Epoch, now)
} else {
request.Epoch = lookup.GetFirstEpoch(now)
}
@ -157,13 +157,10 @@ func (h *Handler) NewRequest(ctx context.Context, view *View) (request *Request,
return request, nil
}
// Lookup retrieves a specific or latest version of the resource
// Lookup works differently depending on the configuration of `ID`
// See the `ID` documentation and helper functions:
// `LookupLatest` and `LookupBefore`
// When looking for the latest update, it starts at the next period after the current time.
// upon failure tries the corresponding keys of each previous period until one is found
// (or startTime is reached, in which case there are no updates).
// Lookup retrieves a specific or latest feed update
// Lookup works differently depending on the configuration of `query`
// See the `query` documentation and helper functions:
// `NewQueryLatest` and `NewQuery`
func (h *Handler) Lookup(ctx context.Context, query *Query) (*cacheEntry, error) {
timeLimit := query.TimeLimit
@ -172,7 +169,7 @@ func (h *Handler) Lookup(ctx context.Context, query *Query) (*cacheEntry, error)
}
if query.Hint == lookup.NoClue { // try to use our cache
entry := h.get(&query.View)
entry := h.get(&query.Feed)
if entry != nil && entry.Epoch.Time <= timeLimit { // avoid bad hints
query.Hint = entry.Epoch
}
@ -183,19 +180,19 @@ func (h *Handler) Lookup(ctx context.Context, query *Query) (*cacheEntry, error)
return nil, NewError(ErrInit, "Call Handler.SetStore() before performing lookups")
}
var ul ID
ul.View = query.View
var id ID
id.Feed = query.Feed
var readCount int
// Invoke the lookup engine.
// The callback will be called every time the lookup algorithm needs to guess
requestPtr, err := lookup.Lookup(timeLimit, query.Hint, func(epoch lookup.Epoch, now uint64) (interface{}, error) {
readCount++
ul.Epoch = epoch
id.Epoch = epoch
ctx, cancel := context.WithTimeout(ctx, defaultRetrieveTimeout)
defer cancel()
chunk, err := h.chunkStore.Get(ctx, ul.Addr())
chunk, err := h.chunkStore.Get(ctx, id.Addr())
if err != nil { // TODO: check for catastrophic errors other than chunk not found
return nil, nil
}
@ -213,39 +210,39 @@ func (h *Handler) Lookup(ctx context.Context, query *Query) (*cacheEntry, error)
return nil, err
}
log.Info(fmt.Sprintf("Resource lookup finished in %d lookups", readCount))
log.Info(fmt.Sprintf("Feed lookup finished in %d lookups", readCount))
request, _ := requestPtr.(*Request)
if request == nil {
return nil, NewError(ErrNotFound, "no updates found")
return nil, NewError(ErrNotFound, "no feed updates found")
}
return h.updateCache(request)
}
// update mutable resource cache map with specified content
// update feed updates cache with specified content
func (h *Handler) updateCache(request *Request) (*cacheEntry, error) {
updateAddr := request.Addr()
log.Trace("resource cache update", "topic", request.Topic.Hex(), "updatekey", updateAddr, "epoch time", request.Epoch.Time, "epoch level", request.Epoch.Level)
log.Trace("feed cache update", "topic", request.Topic.Hex(), "updateaddr", updateAddr, "epoch time", request.Epoch.Time, "epoch level", request.Epoch.Level)
rsrc := h.get(&request.View)
if rsrc == nil {
rsrc = &cacheEntry{}
h.set(&request.View, rsrc)
feedUpdate := h.get(&request.Feed)
if feedUpdate == nil {
feedUpdate = &cacheEntry{}
h.set(&request.Feed, feedUpdate)
}
// update our rsrcs entry map
rsrc.lastKey = updateAddr
rsrc.ResourceUpdate = request.ResourceUpdate
rsrc.Reader = bytes.NewReader(rsrc.data)
return rsrc, nil
feedUpdate.lastKey = updateAddr
feedUpdate.Update = request.Update
feedUpdate.Reader = bytes.NewReader(feedUpdate.data)
return feedUpdate, nil
}
// Update adds an actual data update
// Uses the Mutable Resource metadata currently loaded in the resources map entry.
// It is the caller's responsibility to make sure that this data is not stale.
// Note that a Mutable Resource update cannot span chunks, and thus has a MAX NET LENGTH 4096, INCLUDING update header data and signature. An error will be returned if the total length of the chunk payload will exceed this limit.
// Update publishes a feed update
// Note that a feed update cannot span chunks, and thus has a MAX NET LENGTH 4096, INCLUDING update header data and signature.
// This results in a max payload of `maxUpdateDataLength` (check update.go for more details)
// An error will be returned if the total length of the chunk payload will exceed this limit.
// Update can only check if the caller is trying to overwrite the very last known version, otherwise it just puts the update
// on the network.
func (h *Handler) Update(ctx context.Context, r *Request) (updateAddr storage.Address, err error) {
@ -255,8 +252,8 @@ func (h *Handler) Update(ctx context.Context, r *Request) (updateAddr storage.Ad
return nil, NewError(ErrInit, "Call Handler.SetStore() before updating")
}
rsrc := h.get(&r.View)
if rsrc != nil && rsrc.Epoch.Equals(r.Epoch) { // This is the only cheap check we can do for sure
feedUpdate := h.get(&r.Feed)
if feedUpdate != nil && feedUpdate.Epoch.Equals(r.Epoch) { // This is the only cheap check we can do for sure
return nil, NewError(ErrInvalidValue, "A former update in this epoch is already known to exist")
}
@ -267,32 +264,32 @@ func (h *Handler) Update(ctx context.Context, r *Request) (updateAddr storage.Ad
// send the chunk
h.chunkStore.Put(ctx, chunk)
log.Trace("resource update", "updateAddr", r.idAddr, "epoch time", r.Epoch.Time, "epoch level", r.Epoch.Level, "data", chunk.Data())
// update our resources map cache entry if the new update is older than the one we have, if we have it.
if rsrc != nil && r.Epoch.After(rsrc.Epoch) {
rsrc.Epoch = r.Epoch
rsrc.data = make([]byte, len(r.data))
rsrc.lastKey = r.idAddr
copy(rsrc.data, r.data)
rsrc.Reader = bytes.NewReader(rsrc.data)
log.Trace("feed update", "updateAddr", r.idAddr, "epoch time", r.Epoch.Time, "epoch level", r.Epoch.Level, "data", chunk.Data())
// update our feed updates map cache entry if the new update is older than the one we have, if we have it.
if feedUpdate != nil && r.Epoch.After(feedUpdate.Epoch) {
feedUpdate.Epoch = r.Epoch
feedUpdate.data = make([]byte, len(r.data))
feedUpdate.lastKey = r.idAddr
copy(feedUpdate.data, r.data)
feedUpdate.Reader = bytes.NewReader(feedUpdate.data)
}
return r.idAddr, nil
}
// Retrieves the resource cache value for the given nameHash
func (h *Handler) get(view *View) *cacheEntry {
mapKey := view.mapKey()
h.resourceLock.RLock()
defer h.resourceLock.RUnlock()
rsrc := h.resources[mapKey]
return rsrc
// Retrieves the feed update cache value for the given nameHash
func (h *Handler) get(feed *Feed) *cacheEntry {
mapKey := feed.mapKey()
h.cacheLock.RLock()
defer h.cacheLock.RUnlock()
feedUpdate := h.cache[mapKey]
return feedUpdate
}
// Sets the resource cache value for the given View
func (h *Handler) set(view *View, rsrc *cacheEntry) {
mapKey := view.mapKey()
h.resourceLock.Lock()
defer h.resourceLock.Unlock()
h.resources[mapKey] = rsrc
// Sets the feed update cache value for the given feed
func (h *Handler) set(feed *Feed, feedUpdate *cacheEntry) {
mapKey := feed.mapKey()
h.cacheLock.Lock()
defer h.cacheLock.Unlock()
h.cache[mapKey] = feedUpdate
}

130
swarm/storage/mru/handler_test.go → swarm/storage/feed/handler_test.go
View File

@ -14,7 +14,7 @@
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package mru
package feed
import (
"bytes"
@ -31,7 +31,7 @@ import (
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/swarm/chunk"
"github.com/ethereum/go-ethereum/swarm/storage"
"github.com/ethereum/go-ethereum/swarm/storage/mru/lookup"
"github.com/ethereum/go-ethereum/swarm/storage/feed/lookup"
)
var (
@ -40,7 +40,7 @@ var (
Time: uint64(4200),
}
cleanF func()
resourceName = "føø.bar"
subtopicName = "føø.bar"
hashfunc = storage.MakeHashFunc(storage.DefaultHash)
)
@ -73,7 +73,7 @@ func (f *fakeTimeProvider) Now() Timestamp {
}
// make updates and retrieve them based on periods and versions
func TestResourceHandler(t *testing.T) {
func TestFeedsHandler(t *testing.T) {
// make fake timeProvider
clock := &fakeTimeProvider{
@ -83,18 +83,18 @@ func TestResourceHandler(t *testing.T) {
// signer containing private key
signer := newAliceSigner()
rh, datadir, teardownTest, err := setupTest(clock, signer)
feedsHandler, datadir, teardownTest, err := setupTest(clock, signer)
if err != nil {
t.Fatal(err)
}
defer teardownTest()
// create a new resource
// create a new feed
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
topic, _ := NewTopic("Mess with mru code and see what ghost catches you", nil)
view := View{
topic, _ := NewTopic("Mess with Swarm feeds code and see what ghost catches you", nil)
fd := Feed{
Topic: topic,
User: signer.Address(),
}
@ -107,14 +107,14 @@ func TestResourceHandler(t *testing.T) {
"clyde", // t=4285
}
request := NewFirstRequest(view.Topic) // this timestamps the update at t = 4200 (start time)
resourcekey := make(map[string]storage.Address)
request := NewFirstRequest(fd.Topic) // this timestamps the update at t = 4200 (start time)
chunkAddress := make(map[string]storage.Address)
data := []byte(updates[0])
request.SetData(data)
if err := request.Sign(signer); err != nil {
t.Fatal(err)
}
resourcekey[updates[0]], err = rh.Update(ctx, request)
chunkAddress[updates[0]], err = feedsHandler.Update(ctx, request)
if err != nil {
t.Fatal(err)
}
@ -122,7 +122,7 @@ func TestResourceHandler(t *testing.T) {
// move the clock ahead 21 seconds
clock.FastForward(21) // t=4221
request, err = rh.NewRequest(ctx, &request.View) // this timestamps the update at t = 4221
request, err = feedsHandler.NewRequest(ctx, &request.Feed) // this timestamps the update at t = 4221
if err != nil {
t.Fatal(err)
}
@ -136,14 +136,14 @@ func TestResourceHandler(t *testing.T) {
if err := request.Sign(signer); err != nil {
t.Fatal(err)
}
resourcekey[updates[1]], err = rh.Update(ctx, request)
chunkAddress[updates[1]], err = feedsHandler.Update(ctx, request)
if err == nil {
t.Fatal("Expected update to fail since an update in this epoch already exists")
}
// move the clock ahead 21 seconds
clock.FastForward(21) // t=4242
request, err = rh.NewRequest(ctx, &request.View)
request, err = feedsHandler.NewRequest(ctx, &request.Feed)
if err != nil {
t.Fatal(err)
}
@ -151,14 +151,14 @@ func TestResourceHandler(t *testing.T) {
if err := request.Sign(signer); err != nil {
t.Fatal(err)
}
resourcekey[updates[1]], err = rh.Update(ctx, request)
chunkAddress[updates[1]], err = feedsHandler.Update(ctx, request)
if err != nil {
t.Fatal(err)
}
// move the clock ahead 42 seconds
clock.FastForward(42) // t=4284
request, err = rh.NewRequest(ctx, &request.View)
request, err = feedsHandler.NewRequest(ctx, &request.Feed)
if err != nil {
t.Fatal(err)
}
@ -167,14 +167,14 @@ func TestResourceHandler(t *testing.T) {
if err := request.Sign(signer); err != nil {
t.Fatal(err)
}
resourcekey[updates[2]], err = rh.Update(ctx, request)
chunkAddress[updates[2]], err = feedsHandler.Update(ctx, request)
if err != nil {
t.Fatal(err)
}
// move the clock ahead 1 second
clock.FastForward(1) // t=4285
request, err = rh.NewRequest(ctx, &request.View)
request, err = feedsHandler.NewRequest(ctx, &request.Feed)
if err != nil {
t.Fatal(err)
}
@ -187,56 +187,56 @@ func TestResourceHandler(t *testing.T) {
if err := request.Sign(signer); err != nil {
t.Fatal(err)
}
resourcekey[updates[3]], err = rh.Update(ctx, request)
chunkAddress[updates[3]], err = feedsHandler.Update(ctx, request)
if err != nil {
t.Fatal(err)
}
time.Sleep(time.Second)
rh.Close()
feedsHandler.Close()
// check we can retrieve the updates after close
clock.FastForward(2000) // t=6285
rhparams := &HandlerParams{}
feedParams := &HandlerParams{}
rh2, err := NewTestHandler(datadir, rhparams)
feedsHandler2, err := NewTestHandler(datadir, feedParams)
if err != nil {
t.Fatal(err)
}
rsrc2, err := rh2.Lookup(ctx, NewQueryLatest(&request.View, lookup.NoClue))
update2, err := feedsHandler2.Lookup(ctx, NewQueryLatest(&request.Feed, lookup.NoClue))
if err != nil {
t.Fatal(err)
}
// last update should be "clyde"
if !bytes.Equal(rsrc2.data, []byte(updates[len(updates)-1])) {
t.Fatalf("resource data was %v, expected %v", string(rsrc2.data), updates[len(updates)-1])
if !bytes.Equal(update2.data, []byte(updates[len(updates)-1])) {
t.Fatalf("feed update data was %v, expected %v", string(update2.data), updates[len(updates)-1])
}
if rsrc2.Level != 22 {
t.Fatalf("resource epoch level was %d, expected 22", rsrc2.Level)
if update2.Level != 22 {
t.Fatalf("feed update epoch level was %d, expected 22", update2.Level)
}
if rsrc2.Base() != 0 {
t.Fatalf("resource epoch base time was %d, expected 0", rsrc2.Base())
if update2.Base() != 0 {
t.Fatalf("feed update epoch base time was %d, expected 0", update2.Base())
}
log.Debug("Latest lookup", "epoch base time", rsrc2.Base(), "epoch level", rsrc2.Level, "data", rsrc2.data)
log.Debug("Latest lookup", "epoch base time", update2.Base(), "epoch level", update2.Level, "data", update2.data)
// specific point in time
rsrc, err := rh2.Lookup(ctx, NewQuery(&request.View, 4284, lookup.NoClue))
update, err := feedsHandler2.Lookup(ctx, NewQuery(&request.Feed, 4284, lookup.NoClue))
if err != nil {
t.Fatal(err)
}
// check data
if !bytes.Equal(rsrc.data, []byte(updates[2])) {
t.Fatalf("resource data (historical) was %v, expected %v", string(rsrc2.data), updates[2])
if !bytes.Equal(update.data, []byte(updates[2])) {
t.Fatalf("feed update data (historical) was %v, expected %v", string(update2.data), updates[2])
}
log.Debug("Historical lookup", "epoch base time", rsrc2.Base(), "epoch level", rsrc2.Level, "data", rsrc2.data)
log.Debug("Historical lookup", "epoch base time", update2.Base(), "epoch level", update2.Level, "data", update2.data)
// beyond the first should yield an error
rsrc, err = rh2.Lookup(ctx, NewQuery(&request.View, startTime.Time-1, lookup.NoClue))
update, err = feedsHandler2.Lookup(ctx, NewQuery(&request.Feed, startTime.Time-1, lookup.NoClue))
if err == nil {
t.Fatalf("expected previous to fail, returned epoch %s data %v", rsrc.Epoch.String(), rsrc.data)
t.Fatalf("expected previous to fail, returned epoch %s data %v", update.Epoch.String(), update.data)
}
}
@ -266,11 +266,11 @@ func TestSparseUpdates(t *testing.T) {
defer teardownTest()
defer os.RemoveAll(datadir)
// create a new resource
// create a new feed
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
topic, _ := NewTopic("Very slow updates", nil)
view := View{
fd := Feed{
Topic: topic,
User: signer.Address(),
}
@ -280,7 +280,7 @@ func TestSparseUpdates(t *testing.T) {
var epoch lookup.Epoch
var lastUpdateTime uint64
for T := uint64(0); T < today; T += 5 * Year {
request := NewFirstRequest(view.Topic)
request := NewFirstRequest(fd.Topic)
request.Epoch = lookup.GetNextEpoch(epoch, T)
request.data = generateData(T) // this generates some data that depends on T, so we can check later
request.Sign(signer)
@ -295,14 +295,14 @@ func TestSparseUpdates(t *testing.T) {
lastUpdateTime = T
}
query := NewQuery(&view, today, lookup.NoClue)
query := NewQuery(&fd, today, lookup.NoClue)
_, err = rh.Lookup(ctx, query)
if err != nil {
t.Fatal(err)
}
_, content, err := rh.GetContent(&view)
_, content, err := rh.GetContent(&fd)
if err != nil {
t.Fatal(err)
}
@ -321,7 +321,7 @@ func TestSparseUpdates(t *testing.T) {
t.Fatal(err)
}
_, content, err = rh.GetContent(&view)
_, content, err = rh.GetContent(&fd)
if err != nil {
t.Fatal(err)
}
@ -348,13 +348,13 @@ func TestValidator(t *testing.T) {
}
defer teardownTest()
// create new resource
topic, _ := NewTopic(resourceName, nil)
view := View{
// create new feed
topic, _ := NewTopic(subtopicName, nil)
fd := Feed{
Topic: topic,
User: signer.Address(),
}
mr := NewFirstRequest(view.Topic)
mr := NewFirstRequest(fd.Topic)
// chunk with address
data := []byte("foo")
@ -382,7 +382,7 @@ func TestValidator(t *testing.T) {
}
// tests that the content address validator correctly checks the data
// tests that resource update chunks are passed through content address validator
// tests that feed update chunks are passed through content address validator
// there is some redundancy in this test as it also tests content addressed chunks,
// which should be evaluated as invalid chunks by this validator
func TestValidatorInStore(t *testing.T) {
@ -396,7 +396,7 @@ func TestValidatorInStore(t *testing.T) {
signer := newAliceSigner()
// set up localstore
datadir, err := ioutil.TempDir("", "storage-testresourcevalidator")
datadir, err := ioutil.TempDir("", "storage-testfeedsvalidator")
if err != nil {
t.Fatal(err)
}
@ -409,10 +409,10 @@ func TestValidatorInStore(t *testing.T) {
t.Fatal(err)
}
// set up resource handler and add is as a validator to the localstore
rhParams := &HandlerParams{}
rh := NewHandler(rhParams)
store.Validators = append(store.Validators, rh)
// set up Swarm feeds handler and add is as a validator to the localstore
fhParams := &HandlerParams{}
fh := NewHandler(fhParams)
store.Validators = append(store.Validators, fh)
// create content addressed chunks, one good, one faulty
chunks := storage.GenerateRandomChunks(chunk.DefaultSize, 2)
@ -420,17 +420,17 @@ func TestValidatorInStore(t *testing.T) {
badChunk := storage.NewChunk(chunks[1].Address(), goodChunk.Data())
topic, _ := NewTopic("xyzzy", nil)
view := View{
fd := Feed{
Topic: topic,
User: signer.Address(),
}
// create a resource update chunk with correct publickey
// create a feed update chunk with correct publickey
id := ID{
Epoch: lookup.Epoch{Time: 42,
Level: 1,
},
View: view,
Feed: fd,
}
updateAddr := id.Addr()
@ -438,7 +438,7 @@ func TestValidatorInStore(t *testing.T) {
r := new(Request)
r.idAddr = updateAddr
r.ResourceUpdate.ID = id
r.Update.ID = id
r.data = data
r.Sign(signer)
@ -451,20 +451,20 @@ func TestValidatorInStore(t *testing.T) {
// put the chunks in the store and check their error status
err = store.Put(context.Background(), goodChunk)
if err == nil {
t.Fatal("expected error on good content address chunk with resource validator only, but got nil")
t.Fatal("expected error on good content address chunk with feed update validator only, but got nil")
}
err = store.Put(context.Background(), badChunk)
if err == nil {
t.Fatal("expected error on bad content address chunk with resource validator only, but got nil")
t.Fatal("expected error on bad content address chunk with feed update validator only, but got nil")
}
err = store.Put(context.Background(), uglyChunk)
if err != nil {
t.Fatalf("expected no error on resource update chunk with resource validator only, but got: %s", err)
t.Fatalf("expected no error on feed update chunk with feed update validator only, but got: %s", err)
}
}
// create rpc and resourcehandler
func setupTest(timeProvider timestampProvider, signer Signer) (rh *TestHandler, datadir string, teardown func(), err error) {
// create rpc and feeds Handler
func setupTest(timeProvider timestampProvider, signer Signer) (fh *TestHandler, datadir string, teardown func(), err error) {
var fsClean func()
var rpcClean func()
@ -478,7 +478,7 @@ func setupTest(timeProvider timestampProvider, signer Signer) (rh *TestHandler,
}
// temp datadir
datadir, err = ioutil.TempDir("", "rh")
datadir, err = ioutil.TempDir("", "fh")
if err != nil {
return nil, "", nil, err
}
@ -487,9 +487,9 @@ func setupTest(timeProvider timestampProvider, signer Signer) (rh *TestHandler,
}
TimestampProvider = timeProvider
rhparams := &HandlerParams{}
rh, err = NewTestHandler(datadir, rhparams)
return rh, datadir, cleanF, err
fhParams := &HandlerParams{}
fh, err = NewTestHandler(datadir, fhParams)
return fh, datadir, cleanF, err
}
func newAliceSigner() *GenericSigner {

30
swarm/storage/mru/id.go → swarm/storage/feed/id.go
View File

@ -14,7 +14,7 @@
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package mru
package feed
import (
"fmt"
@ -22,28 +22,28 @@ import (
"strconv"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/swarm/storage/mru/lookup"
"github.com/ethereum/go-ethereum/swarm/storage/feed/lookup"
"github.com/ethereum/go-ethereum/swarm/storage"
)
// ID uniquely identifies an update on the network.
type ID struct {
View `json:"view"`
Feed `json:"feed"`
lookup.Epoch `json:"epoch"`
}
// ID layout:
// View viewLength bytes
// Feed feedLength bytes
// Epoch EpochLength
const idLength = viewLength + lookup.EpochLength
const idLength = feedLength + lookup.EpochLength
// Addr calculates the resource update chunk address corresponding to this ID
// Addr calculates the feed update chunk address corresponding to this ID
func (u *ID) Addr() (updateAddr storage.Address) {
serializedData := make([]byte, idLength)
var cursor int
u.View.binaryPut(serializedData[cursor : cursor+viewLength])
cursor += viewLength
u.Feed.binaryPut(serializedData[cursor : cursor+feedLength])
cursor += feedLength
eid := u.Epoch.ID()
copy(serializedData[cursor:cursor+lookup.EpochLength], eid[:])
@ -61,10 +61,10 @@ func (u *ID) binaryPut(serializedData []byte) error {
return NewErrorf(ErrInvalidValue, "Incorrect slice size to serialize ID. Expected %d, got %d", idLength, len(serializedData))
}
var cursor int
if err := u.View.binaryPut(serializedData[cursor : cursor+viewLength]); err != nil {
if err := u.Feed.binaryPut(serializedData[cursor : cursor+feedLength]); err != nil {
return err
}
cursor += viewLength
cursor += feedLength
epochBytes, err := u.Epoch.MarshalBinary()
if err != nil {
@ -88,10 +88,10 @@ func (u *ID) binaryGet(serializedData []byte) error {
}
var cursor int
if err := u.View.binaryGet(serializedData[cursor : cursor+viewLength]); err != nil {
if err := u.Feed.binaryGet(serializedData[cursor : cursor+feedLength]); err != nil {
return err
}
cursor += viewLength
cursor += feedLength
if err := u.Epoch.UnmarshalBinary(serializedData[cursor : cursor+lookup.EpochLength]); err != nil {
return err
@ -108,8 +108,8 @@ func (u *ID) FromValues(values Values) error {
u.Epoch.Level = uint8(level)
u.Epoch.Time, _ = strconv.ParseUint(values.Get("time"), 10, 64)
if u.View.User == (common.Address{}) {
return u.View.FromValues(values)
if u.Feed.User == (common.Address{}) {
return u.Feed.FromValues(values)
}
return nil
}
@ -119,5 +119,5 @@ func (u *ID) FromValues(values Values) error {
func (u *ID) AppendValues(values Values) {
values.Set("level", fmt.Sprintf("%d", u.Epoch.Level))
values.Set("time", fmt.Sprintf("%d", u.Epoch.Time))
u.View.AppendValues(values)
u.Feed.AppendValues(values)
}

10
swarm/storage/mru/id_test.go → swarm/storage/feed/id_test.go
View File

@ -1,21 +1,21 @@
package mru
package feed
import (
"testing"
"github.com/ethereum/go-ethereum/swarm/storage/mru/lookup"
"github.com/ethereum/go-ethereum/swarm/storage/feed/lookup"
)
func getTestID() *ID {
return &ID{
View: *getTestView(),
Feed: *getTestFeed(),
Epoch: lookup.GetFirstEpoch(1000),
}
}
func TestIDAddr(t *testing.T) {
ul := getTestID()
updateAddr := ul.Addr()
id := getTestID()
updateAddr := id.Addr()
compareByteSliceToExpectedHex(t, "updateAddr", updateAddr, "0x8b24583ec293e085f4c78aaee66d1bc5abfb8b4233304d14a349afa57af2a783")
}

0
swarm/storage/mru/lookup/epoch.go → swarm/storage/feed/lookup/epoch.go
View File

2
swarm/storage/mru/lookup/epoch_test.go → swarm/storage/feed/lookup/epoch_test.go
View File

@ -3,7 +3,7 @@ package lookup_test
import (
"testing"
"github.com/ethereum/go-ethereum/swarm/storage/mru/lookup"
"github.com/ethereum/go-ethereum/swarm/storage/feed/lookup"
)
func TestMarshallers(t *testing.T) {

2
swarm/storage/mru/lookup/lookup.go → swarm/storage/feed/lookup/lookup.go
View File

@ -15,7 +15,7 @@
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
/*
Package lookup defines resource lookup algorithms and provides tools to place updates
Package lookup defines feed lookup algorithms and provides tools to place updates
so they can be found
*/
package lookup

2
swarm/storage/mru/lookup/lookup_test.go → swarm/storage/feed/lookup/lookup_test.go
View File

@ -22,7 +22,7 @@ import (
"testing"
"github.com/ethereum/go-ethereum/swarm/log"
"github.com/ethereum/go-ethereum/swarm/storage/mru/lookup"
"github.com/ethereum/go-ethereum/swarm/storage/feed/lookup"
)
type Data struct {

22
swarm/storage/mru/query.go → swarm/storage/feed/query.go
View File

@ -14,20 +14,20 @@
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package mru
package feed
import (
"fmt"
"strconv"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/swarm/storage/mru/lookup"
"github.com/ethereum/go-ethereum/swarm/storage/feed/lookup"
)
// Query is used to specify constraints when performing an update lookup
// TimeLimit indicates an upper bound for the search. Set to 0 for "now"
type Query struct {
View
Feed
Hint lookup.Epoch
TimeLimit uint64
}
@ -41,8 +41,8 @@ func (q *Query) FromValues(values Values) error {
level, _ := strconv.ParseUint(values.Get("hint.level"), 10, 32)
q.Hint.Level = uint8(level)
q.Hint.Time, _ = strconv.ParseUint(values.Get("hint.time"), 10, 64)
if q.View.User == (common.Address{}) {
return q.View.FromValues(values)
if q.Feed.User == (common.Address{}) {
return q.Feed.FromValues(values)
}
return nil
}
@ -59,20 +59,20 @@ func (q *Query) AppendValues(values Values) {
if q.Hint.Time != 0 {
values.Set("hint.time", fmt.Sprintf("%d", q.Hint.Time))
}
q.View.AppendValues(values)
q.Feed.AppendValues(values)
}
// NewQuery constructs an Query structure to find updates on or before `time`
// if time == 0, the latest update will be looked up
func NewQuery(view *View, time uint64, hint lookup.Epoch) *Query {
func NewQuery(feed *Feed, time uint64, hint lookup.Epoch) *Query {
return &Query{
TimeLimit: time,
View: *view,
Feed: *feed,
Hint: hint,
}
}
// NewQueryLatest generates lookup parameters that look for the latest version of a resource
func NewQueryLatest(view *View, hint lookup.Epoch) *Query {
return NewQuery(view, 0, hint)
// NewQueryLatest generates lookup parameters that look for the latest update to a feed
func NewQueryLatest(feed *Feed, hint lookup.Epoch) *Query {
return NewQuery(feed, 0, hint)
}

8
swarm/storage/mru/query_test.go → swarm/storage/feed/query_test.go
View File

@ -14,18 +14,18 @@
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package mru
package feed
import (
"testing"
)
func getTestQuery() *Query {
ul := getTestID()
id := getTestID()
return &Query{
TimeLimit: 5000,
View: ul.View,
Hint: ul.Epoch,
Feed: id.Feed,
Hint: id.Epoch,
}
}

50
swarm/storage/mru/request.go → swarm/storage/feed/request.go
View File

@ -14,7 +14,7 @@
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package mru
package feed
import (
"bytes"
@ -24,15 +24,15 @@ import (
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/hexutil"
"github.com/ethereum/go-ethereum/swarm/storage"
"github.com/ethereum/go-ethereum/swarm/storage/mru/lookup"
"github.com/ethereum/go-ethereum/swarm/storage/feed/lookup"
)
// Request represents an update and/or resource create message
// Request represents a request to sign or signed feed update message
type Request struct {
ResourceUpdate // actual content that will be put on the chunk, less signature
Signature *Signature
idAddr storage.Address // cached chunk address for the update (not serialized, for internal use)
binaryData []byte // cached serialized data (does not get serialized again!, for efficiency/internal use)
Update // actual content that will be put on the chunk, less signature
Signature *Signature
idAddr storage.Address // cached chunk address for the update (not serialized, for internal use)
binaryData []byte // cached serialized data (does not get serialized again!, for efficiency/internal use)
}
// updateRequestJSON represents a JSON-serialized UpdateRequest
@ -44,11 +44,11 @@ type updateRequestJSON struct {
}
// Request layout
// resourceUpdate bytes
// Update bytes
// SignatureLength bytes
const minimumSignedUpdateLength = minimumUpdateDataLength + signatureLength
// NewFirstRequest returns a ready to sign request to publish a first update
// NewFirstRequest returns a ready to sign request to publish a first feed update
func NewFirstRequest(topic Topic) *Request {
request := new(Request)
@ -56,13 +56,13 @@ func NewFirstRequest(topic Topic) *Request {
// get the current time
now := TimestampProvider.Now().Time
request.Epoch = lookup.GetFirstEpoch(now)
request.View.Topic = topic
request.Feed.Topic = topic
request.Header.Version = ProtocolVersion
return request
}
// SetData stores the payload data the resource will be updated with
// SetData stores the payload data the feed update will be updated with
func (r *Request) SetData(data []byte) {
r.data = data
r.Signature = nil
@ -73,7 +73,7 @@ func (r *Request) IsUpdate() bool {
return r.Signature != nil
}
// Verify checks that signatures are valid and that the signer owns the resource to be updated
// Verify checks that signatures are valid
func (r *Request) Verify() (err error) {
if len(r.data) == 0 {
return NewError(ErrInvalidValue, "Update does not contain data")
@ -88,7 +88,7 @@ func (r *Request) Verify() (err error) {
}
// get the address of the signer (which also checks that it's a valid signature)
r.View.User, err = getUserAddr(digest, *r.Signature)
r.Feed.User, err = getUserAddr(digest, *r.Signature)
if err != nil {
return err
}
@ -103,9 +103,9 @@ func (r *Request) Verify() (err error) {
return nil
}
// Sign executes the signature to validate the resource
// Sign executes the signature to validate the update message
func (r *Request) Sign(signer Signer) error {
r.View.User = signer.Address()
r.Feed.User = signer.Address()
r.binaryData = nil //invalidate serialized data
digest, err := r.GetDigest() // computes digest and serializes into .binaryData
if err != nil {
@ -133,16 +133,16 @@ func (r *Request) Sign(signer Signer) error {
return nil
}
// GetDigest creates the resource update digest used in signatures
// GetDigest creates the feed update digest used in signatures
// the serialized payload is cached in .binaryData
func (r *Request) GetDigest() (result common.Hash, err error) {
hasher := hashPool.Get().(hash.Hash)
defer hashPool.Put(hasher)
hasher.Reset()
dataLength := r.ResourceUpdate.binaryLength()
dataLength := r.Update.binaryLength()
if r.binaryData == nil {
r.binaryData = make([]byte, dataLength+signatureLength)
if err := r.ResourceUpdate.binaryPut(r.binaryData[:dataLength]); err != nil {
if err := r.Update.binaryPut(r.binaryData[:dataLength]); err != nil {
return result, err
}
}
@ -161,10 +161,10 @@ func (r *Request) toChunk() (storage.Chunk, error) {
return nil, NewError(ErrInvalidSignature, "toChunk called without a valid signature or payload data. Call .Sign() first.")
}
resourceUpdateLength := r.ResourceUpdate.binaryLength()
updateLength := r.Update.binaryLength()
// signature is the last item in the chunk data
copy(r.binaryData[resourceUpdateLength:], r.Signature[:])
copy(r.binaryData[updateLength:], r.Signature[:])
chunk := storage.NewChunk(r.idAddr, r.binaryData)
return chunk, nil
@ -174,14 +174,14 @@ func (r *Request) toChunk() (storage.Chunk, error) {
func (r *Request) fromChunk(updateAddr storage.Address, chunkdata []byte) error {
// for update chunk layout see Request definition
//deserialize the resource update portion
if err := r.ResourceUpdate.binaryGet(chunkdata[:len(chunkdata)-signatureLength]); err != nil {
//deserialize the feed update portion
if err := r.Update.binaryGet(chunkdata[:len(chunkdata)-signatureLength]); err != nil {
return err
}
// Extract the signature
var signature *Signature
cursor := r.ResourceUpdate.binaryLength()
cursor := r.Update.binaryLength()
sigdata := chunkdata[cursor : cursor+signatureLength]
if len(sigdata) > 0 {
signature = &Signature{}
@ -209,7 +209,7 @@ func (r *Request) FromValues(values Values, data []byte) error {
r.Signature = new(Signature)
copy(r.Signature[:], signatureBytes)
}
err = r.ResourceUpdate.FromValues(values, data)
err = r.Update.FromValues(values, data)
if err != nil {
return err
}
@ -223,7 +223,7 @@ func (r *Request) AppendValues(values Values) []byte {
if r.Signature != nil {
values.Set("signature", hexutil.Encode(r.Signature[:]))
}
return r.ResourceUpdate.AppendValues(values)
return r.Update.AppendValues(values)
}
// fromJSON takes an update request JSON and populates an UpdateRequest

58
swarm/storage/mru/request_test.go → swarm/storage/feed/request_test.go
View File

@ -14,7 +14,7 @@
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package mru
package feed
import (
"bytes"
@ -26,7 +26,7 @@ import (
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/swarm/storage"
"github.com/ethereum/go-ethereum/swarm/storage/mru/lookup"
"github.com/ethereum/go-ethereum/swarm/storage/feed/lookup"
)
func areEqualJSON(s1, s2 string) (bool, error) {
@ -47,51 +47,49 @@ func areEqualJSON(s1, s2 string) (bool, error) {
}
// TestEncodingDecodingUpdateRequests ensures that requests are serialized properly
// while also checking cryptographically that only the owner of a resource can update it.
// while also checking cryptographically that only the owner of a feed can update it.
func TestEncodingDecodingUpdateRequests(t *testing.T) {
charlie := newCharlieSigner() //Charlie
bob := newBobSigner() //Bob
// Create a resource to our good guy Charlie's name
topic, _ := NewTopic("a good resource name", nil)
createRequest := NewFirstRequest(topic)
createRequest.User = charlie.Address()
// Create a feed to our good guy Charlie's name
topic, _ := NewTopic("a good topic name", nil)
firstRequest := NewFirstRequest(topic)
firstRequest.User = charlie.Address()
// We now encode the create message to simulate we send it over the wire
messageRawData, err := createRequest.MarshalJSON()
messageRawData, err := firstRequest.MarshalJSON()
if err != nil {
t.Fatalf("Error encoding create resource request: %s", err)
t.Fatalf("Error encoding first feed update request: %s", err)
}
// ... the message arrives and is decoded...
var recoveredCreateRequest Request
if err := recoveredCreateRequest.UnmarshalJSON(messageRawData); err != nil {
t.Fatalf("Error decoding create resource request: %s", err)
var recoveredFirstRequest Request
if err := recoveredFirstRequest.UnmarshalJSON(messageRawData); err != nil {
t.Fatalf("Error decoding first feed update request: %s", err)
}
// ... but verification should fail because it is not signed!
if err := recoveredCreateRequest.Verify(); err == nil {
if err := recoveredFirstRequest.Verify(); err == nil {
t.Fatal("Expected Verify to fail since the message is not signed")
}
// We now assume that the resource was created and propagated. With rootAddr we can retrieve the resource metadata
// and recover the information above. To sign an update, we need the rootAddr and the metaHash to construct
// proof of ownership
// We now assume that the feed ypdate was created and propagated.
const expectedSignature = "0x32c2d2c7224e24e4d3ae6a10595fc6e945f1b3ecdf548a04d8247c240a50c9240076aa7730abad6c8a46dfea00cfb8f43b6211f02db5c4cc5ed8584cb0212a4d00"
const expectedJSON = `{"view":{"topic":"0x6120676f6f64207265736f75726365206e616d65000000000000000000000000","user":"0x876a8936a7cd0b79ef0735ad0896c1afe278781c"},"epoch":{"time":1000,"level":1},"protocolVersion":0,"data":"0x5468697320686f75722773207570646174653a20537761726d2039392e3020686173206265656e2072656c656173656421"}`
const expectedSignature = "0x7235b27a68372ddebcf78eba48543fa460864b0b0e99cb533fcd3664820e603312d29426dd00fb39628f5299480a69bf6e462838d78de49ce0704c754c9deb2601"
const expectedJSON = `{"feed":{"topic":"0x6120676f6f6420746f706963206e616d65000000000000000000000000000000","user":"0x876a8936a7cd0b79ef0735ad0896c1afe278781c"},"epoch":{"time":1000,"level":1},"protocolVersion":0,"data":"0x5468697320686f75722773207570646174653a20537761726d2039392e3020686173206265656e2072656c656173656421"}`
//Put together an unsigned update request that we will serialize to send it to the signer.
data := []byte("This hour's update: Swarm 99.0 has been released!")
request := &Request{
ResourceUpdate: ResourceUpdate{
Update: Update{
ID: ID{
Epoch: lookup.Epoch{
Time: 1000,
Level: 1,
},
View: createRequest.ResourceUpdate.View,
Feed: firstRequest.Update.Feed,
},
data: data,
},
@ -138,7 +136,7 @@ func TestEncodingDecodingUpdateRequests(t *testing.T) {
t.Fatal("Expected DecodeUpdateRequest to fail when trying to interpret a corrupt message with an invalid signature")
}
// Now imagine Bob wants to create an update of his own about the same resource,
// Now imagine Bob wants to create an update of his own about the same feed,
// signing a message with his private key
if err := request.Sign(bob); err != nil {
t.Fatalf("Error signing: %s", err)
@ -191,7 +189,7 @@ func TestEncodingDecodingUpdateRequests(t *testing.T) {
func getTestRequest() *Request {
return &Request{
ResourceUpdate: *getTestResourceUpdate(),
Update: *getTestFeedUpdate(),
}
}
@ -230,7 +228,7 @@ func TestUpdateChunkSerializationErrorChecking(t *testing.T) {
var recovered Request
recovered.fromChunk(chunk.Address(), chunk.Data())
if !reflect.DeepEqual(recovered, r) {
t.Fatal("Expected recovered SignedResource update to equal the original one")
t.Fatal("Expected recovered feed update request to equal the original one")
}
}
@ -250,7 +248,7 @@ func TestReverse(t *testing.T) {
// signer containing private key
signer := newAliceSigner()
// set up rpc and create resourcehandler
// set up rpc and create feeds handler
_, _, teardownTest, err := setupTest(timeProvider, signer)
if err != nil {
t.Fatal(err)
@ -258,7 +256,7 @@ func TestReverse(t *testing.T) {
defer teardownTest()
topic, _ := NewTopic("Cervantes quotes", nil)
view := View{
fd := Feed{
Topic: topic,
User: signer.Address(),
}
@ -266,7 +264,7 @@ func TestReverse(t *testing.T) {
data := []byte("Donde una puerta se cierra, otra se abre")
request := new(Request)
request.View = view
request.Feed = fd
request.Epoch = epoch
request.data = data
@ -291,15 +289,15 @@ func TestReverse(t *testing.T) {
if err != nil {
t.Fatal(err)
}
recoveredaddress, err := getUserAddr(checkdigest, *checkUpdate.Signature)
recoveredAddr, err := getUserAddr(checkdigest, *checkUpdate.Signature)
if err != nil {
t.Fatalf("Retrieve address from signature fail: %v", err)
}
originaladdress := crypto.PubkeyToAddress(signer.PrivKey.PublicKey)
originalAddr := crypto.PubkeyToAddress(signer.PrivKey.PublicKey)
// check that the metadata retrieved from the chunk matches what we gave it
if recoveredaddress != originaladdress {
t.Fatalf("addresses dont match: %x != %x", originaladdress, recoveredaddress)
if recoveredAddr != originalAddr {
t.Fatalf("addresses dont match: %x != %x", originalAddr, recoveredAddr)
}
if !bytes.Equal(key[:], chunk.Address()[:]) {

6
swarm/storage/mru/resource_sign.go → swarm/storage/feed/sign.go
View File

@ -14,7 +14,7 @@
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package mru
package feed
import (
"crypto/ecdsa"
@ -28,7 +28,7 @@ const signatureLength = 65
// Signature is an alias for a static byte array with the size of a signature
type Signature [signatureLength]byte
// Signer signs Mutable Resource update payloads
// Signer signs feed update payloads
type Signer interface {
Sign(common.Hash) (Signature, error)
Address() common.Address
@ -65,7 +65,7 @@ func (s *GenericSigner) Address() common.Address {
return s.address
}
// getUserAddr extracts the address of the resource update signer
// getUserAddr extracts the address of the feed update signer
func getUserAddr(digest common.Hash, signature Signature) (common.Address, error) {
pub, err := crypto.SigToPub(digest.Bytes(), signature[:])
if err != nil {

14
swarm/storage/mru/testutil.go → swarm/storage/feed/testutil.go
View File

@ -14,7 +14,7 @@
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package mru
package feed
import (
"context"
@ -27,7 +27,7 @@ import (
)
const (
testDbDirName = "mru"
testDbDirName = "feeds"
)
type TestHandler struct {
@ -52,20 +52,20 @@ func newFakeNetFetcher(context.Context, storage.Address, *sync.Map) storage.NetF
// NewTestHandler creates Handler object to be used for testing purposes.
func NewTestHandler(datadir string, params *HandlerParams) (*TestHandler, error) {
path := filepath.Join(datadir, testDbDirName)
rh := NewHandler(params)
fh := NewHandler(params)
localstoreparams := storage.NewDefaultLocalStoreParams()
localstoreparams.Init(path)
localStore, err := storage.NewLocalStore(localstoreparams, nil)
if err != nil {
return nil, fmt.Errorf("localstore create fail, path %s: %v", path, err)
}
localStore.Validators = append(localStore.Validators, storage.NewContentAddressValidator(storage.MakeHashFunc(resourceHashAlgorithm)))
localStore.Validators = append(localStore.Validators, rh)
localStore.Validators = append(localStore.Validators, storage.NewContentAddressValidator(storage.MakeHashFunc(feedsHashAlgorithm)))
localStore.Validators = append(localStore.Validators, fh)
netStore, err := storage.NewNetStore(localStore, nil)
if err != nil {
return nil, err
}
netStore.NewNetFetcherFunc = newFakeNetFetcher
rh.SetStore(netStore)
return &TestHandler{rh}, nil
fh.SetStore(netStore)
return &TestHandler{fh}, nil
}

4
swarm/storage/mru/timestampprovider.go → swarm/storage/feed/timestampprovider.go
View File

@ -14,7 +14,7 @@
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package mru
package feed
import (
"encoding/binary"
@ -22,7 +22,7 @@ import (
"time"
)
// TimestampProvider sets the time source of the mru package
// TimestampProvider sets the time source of the feeds package
var TimestampProvider timestampProvider = NewDefaultTimestampProvider()
// Timestamp encodes a point in time as a Unix epoch

6
swarm/storage/mru/topic.go → swarm/storage/feed/topic.go
View File

@ -14,7 +14,7 @@
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package mru
package feed
import (
"bytes"
@ -29,7 +29,7 @@ import (
// TopicLength establishes the max length of a topic string
const TopicLength = storage.AddressLength
// Topic represents what a resource talks about
// Topic represents what a feed is about
type Topic [TopicLength]byte
// ErrTopicTooLong is returned when creating a topic with a name/related content too long
@ -74,7 +74,7 @@ func (t *Topic) FromHex(hex string) error {
return nil
}
// Name will try to extract the resource name out of the topic
// Name will try to extract the topic name out of the Topic
func (t *Topic) Name(relatedContent []byte) string {
nameBytes := *t
if relatedContent != nil {

2
swarm/storage/mru/topic_test.go → swarm/storage/feed/topic_test.go
View File

@ -1,4 +1,4 @@
package mru
package feed
import (
"testing"

26
swarm/storage/mru/update.go → swarm/storage/feed/update.go
View File

@ -14,7 +14,7 @@
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package mru
package feed
import (
"fmt"
@ -34,25 +34,25 @@ type Header struct {
Padding [headerLength - 1]uint8 // reserved for future use
}
// ResourceUpdate encapsulates the information sent as part of a resource update
type ResourceUpdate struct {
// Update encapsulates the information sent as part of a feed update
type Update struct {
Header Header //
ID // Resource update identifying information
ID // Feed Update identifying information
data []byte // actual data payload
}
const minimumUpdateDataLength = idLength + headerLength + 1
const maxUpdateDataLength = chunk.DefaultSize - signatureLength - idLength - headerLength
// binaryPut serializes the resource update information into the given slice
func (r *ResourceUpdate) binaryPut(serializedData []byte) error {
// binaryPut serializes the feed update information into the given slice
func (r *Update) binaryPut(serializedData []byte) error {
datalength := len(r.data)
if datalength == 0 {
return NewError(ErrInvalidValue, "cannot update a resource with no data")
return NewError(ErrInvalidValue, "a feed update must contain data")
}
if datalength > maxUpdateDataLength {
return NewErrorf(ErrInvalidValue, "data is too big (length=%d). Max length=%d", datalength, maxUpdateDataLength)
return NewErrorf(ErrInvalidValue, "feed update data is too big (length=%d). Max length=%d", datalength, maxUpdateDataLength)
}
if len(serializedData) != r.binaryLength() {
@ -79,14 +79,14 @@ func (r *ResourceUpdate) binaryPut(serializedData []byte) error {
}
// binaryLength returns the expected number of bytes this structure will take to encode
func (r *ResourceUpdate) binaryLength() int {
func (r *Update) binaryLength() int {
return idLength + headerLength + len(r.data)
}
// binaryGet populates this instance from the information contained in the passed byte slice
func (r *ResourceUpdate) binaryGet(serializedData []byte) error {
func (r *Update) binaryGet(serializedData []byte) error {
if len(serializedData) < minimumUpdateDataLength {
return NewErrorf(ErrNothingToReturn, "chunk less than %d bytes cannot be a resource update chunk", minimumUpdateDataLength)
return NewErrorf(ErrNothingToReturn, "chunk less than %d bytes cannot be a feed update chunk", minimumUpdateDataLength)
}
dataLength := len(serializedData) - idLength - headerLength
// at this point we can be satisfied that we have the correct data length to read
@ -116,7 +116,7 @@ func (r *ResourceUpdate) binaryGet(serializedData []byte) error {
// FromValues deserializes this instance from a string key-value store
// useful to parse query strings
func (r *ResourceUpdate) FromValues(values Values, data []byte) error {
func (r *Update) FromValues(values Values, data []byte) error {
r.data = data
version, _ := strconv.ParseUint(values.Get("protocolVersion"), 10, 32)
r.Header.Version = uint8(version)
@ -125,7 +125,7 @@ func (r *ResourceUpdate) FromValues(values Values, data []byte) error {
// AppendValues serializes this structure into the provided string key-value store
// useful to build query strings
func (r *ResourceUpdate) AppendValues(values Values) []byte {
func (r *Update) AppendValues(values Values) []byte {
r.ID.AppendValues(values)
values.Set("protocolVersion", fmt.Sprintf("%d", r.Header.Version))
return r.data

20
swarm/storage/mru/update_test.go → swarm/storage/feed/update_test.go
View File

@ -14,37 +14,37 @@
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package mru
package feed
import (
"testing"
)
func getTestResourceUpdate() *ResourceUpdate {
return &ResourceUpdate{
func getTestFeedUpdate() *Update {
return &Update{
ID: *getTestID(),
data: []byte("El que lee mucho y anda mucho, ve mucho y sabe mucho"),
}
}
func TestResourceUpdateSerializer(t *testing.T) {
testBinarySerializerRecovery(t, getTestResourceUpdate(), "0x0000000000000000776f726c64206e657773207265706f72742c20657665727920686f7572000000876a8936a7cd0b79ef0735ad0896c1afe278781ce803000000000019456c20717565206c6565206d7563686f207920616e6461206d7563686f2c207665206d7563686f20792073616265206d7563686f")
func TestUpdateSerializer(t *testing.T) {
testBinarySerializerRecovery(t, getTestFeedUpdate(), "0x0000000000000000776f726c64206e657773207265706f72742c20657665727920686f7572000000876a8936a7cd0b79ef0735ad0896c1afe278781ce803000000000019456c20717565206c6565206d7563686f207920616e6461206d7563686f2c207665206d7563686f20792073616265206d7563686f")
}
func TestResourceUpdateLengthCheck(t *testing.T) {
testBinarySerializerLengthCheck(t, getTestResourceUpdate())
func TestUpdateLengthCheck(t *testing.T) {
testBinarySerializerLengthCheck(t, getTestFeedUpdate())
// Test fail if update is too big
update := getTestResourceUpdate()
update := getTestFeedUpdate()
update.data = make([]byte, maxUpdateDataLength+100)
serialized := make([]byte, update.binaryLength())
if err := update.binaryPut(serialized); err == nil {
t.Fatal("Expected resourceUpdate.binaryPut to fail since update is too big")
t.Fatal("Expected update.binaryPut to fail since update is too big")
}
// test fail if data is empty or nil
update.data = nil
serialized = make([]byte, update.binaryLength())
if err := update.binaryPut(serialized); err == nil {
t.Fatal("Expected resourceUpdate.binaryPut to fail since data is empty")
t.Fatal("Expected update.binaryPut to fail since data is empty")
}
}

4
swarm/storage/localstore_test.go
View File

@ -30,8 +30,8 @@ var (
)
// tests that the content address validator correctly checks the data
// tests that resource update chunks are passed through content address validator
// the test checking the resouce update validator internal correctness is found in resource_test.go
// tests that feed update chunks are passed through content address validator
// the test checking the resouce update validator internal correctness is found in storage/feeds/handler_test.go
func TestValidator(t *testing.T) {
// set up localstore
datadir, err := ioutil.TempDir("", "storage-testvalidator")

44
swarm/storage/mru/doc.go
View File

@ -1,44 +0,0 @@
/*
Package mru defines Mutable resource updates.
A Mutable Resource is an entity which allows updates to a resource
without resorting to ENS on each update.
The update scheme is built on swarm chunks with chunk keys following
a predictable, versionable pattern.
A Resource is tied to a unique identifier that is deterministically generated out of
the chosen topic.
A Resource View is defined as a specific user's point of view about a particular resource.
Thus, a View is a Topic + the user's address (userAddr)
Actual data updates are also made in the form of swarm chunks. The keys
of the updates are the hash of a concatenation of properties as follows:
updateAddr = H(View, Epoch ID)
where H is the SHA3 hash function
View is the combination of Topic and the user address
Epoch ID is a time slot. See the lookup package for more information.
A user looking up a resource would only need to know the View in order to
another user's updates
The resource update data is:
resourcedata = View|Epoch|data
the full update data that goes in the chunk payload is:
resourcedata|sign(resourcedata)
Structure Summary:
Request: Resource update with signature
ResourceUpdate: headers + data
Header: Protocol version and reserved for future use placeholders
ID: Information about how to locate a specific update
View: Author of the update and what is updating
Topic: Item that the updates are about
User: User who updates the resource
Epoch: time slot where the update is stored
*/
package mru

14
swarm/swarm.go
View File

@ -49,8 +49,8 @@ import (
"github.com/ethereum/go-ethereum/swarm/pss"
"github.com/ethereum/go-ethereum/swarm/state"
"github.com/ethereum/go-ethereum/swarm/storage"
"github.com/ethereum/go-ethereum/swarm/storage/feed"
"github.com/ethereum/go-ethereum/swarm/storage/mock"
"github.com/ethereum/go-ethereum/swarm/storage/mru"
"github.com/ethereum/go-ethereum/swarm/tracing"
)
@ -186,15 +186,15 @@ func NewSwarm(config *api.Config, mockStore *mock.NodeStore) (self *Swarm, err e
// Swarm Hash Merklised Chunking for Arbitrary-length Document/File storage
self.fileStore = storage.NewFileStore(self.netStore, self.config.FileStoreParams)
var resourceHandler *mru.Handler
rhparams := &mru.HandlerParams{}
var feedsHandler *feed.Handler
fhParams := &feed.HandlerParams{}
resourceHandler = mru.NewHandler(rhparams)
resourceHandler.SetStore(self.netStore)
feedsHandler = feed.NewHandler(fhParams)
feedsHandler.SetStore(self.netStore)
lstore.Validators = []storage.ChunkValidator{
storage.NewContentAddressValidator(storage.MakeHashFunc(storage.DefaultHash)),
resourceHandler,
feedsHandler,
}
err = lstore.Migrate()
@ -215,7 +215,7 @@ func NewSwarm(config *api.Config, mockStore *mock.NodeStore) (self *Swarm, err e
pss.SetHandshakeController(self.ps, pss.NewHandshakeParams())
}
self.api = api.NewAPI(self.fileStore, self.dns, resourceHandler, self.privateKey)
self.api = api.NewAPI(self.fileStore, self.dns, feedsHandler, self.privateKey)
self.sfs = fuse.NewSwarmFS(self.api)
log.Debug("Initialized FUSE filesystem")

18
swarm/testutil/http.go
View File

@ -25,7 +25,7 @@ import (
"github.com/ethereum/go-ethereum/swarm/api"
"github.com/ethereum/go-ethereum/swarm/storage"
"github.com/ethereum/go-ethereum/swarm/storage/mru"
"github.com/ethereum/go-ethereum/swarm/storage/feed"
)
type TestServer interface {
@ -48,14 +48,14 @@ func NewTestSwarmServer(t *testing.T, serverFunc func(*api.API) TestServer, reso
}
fileStore := storage.NewFileStore(localStore, storage.NewFileStoreParams())
// mutable resources test setup
resourceDir, err := ioutil.TempDir("", "swarm-resource-test")
// Swarm feeds test setup
feedsDir, err := ioutil.TempDir("", "swarm-feeds-test")
if err != nil {
t.Fatal(err)
}
rhparams := &mru.HandlerParams{}
rh, err := mru.NewTestHandler(resourceDir, rhparams)
rhparams := &feed.HandlerParams{}
rh, err := feed.NewTestHandler(feedsDir, rhparams)
if err != nil {
t.Fatal(err)
}
@ -71,11 +71,11 @@ func NewTestSwarmServer(t *testing.T, serverFunc func(*api.API) TestServer, reso
srv.Close()
rh.Close()
os.RemoveAll(dir)
os.RemoveAll(resourceDir)
os.RemoveAll(feedsDir)
},
CurrentTime: 42,
}
mru.TimestampProvider = tss
feed.TimestampProvider = tss
return tss
}
@ -92,6 +92,6 @@ func (t *TestSwarmServer) Close() {
t.cleanup()
}
func (t *TestSwarmServer) Now() mru.Timestamp {
return mru.Timestamp{Time: t.CurrentTime}
func (t *TestSwarmServer) Now() feed.Timestamp {
return feed.Timestamp{Time: t.CurrentTime}
}