mirror of https://github.com/poanetwork/quorum.git
prevent discarding requests when parsing fails
This commit is contained in:
parent
41de1cb723
commit
c2590af7fd
|
@ -10,64 +10,134 @@ import (
|
|||
)
|
||||
|
||||
const (
|
||||
READ_TIMEOUT = 15 // read timeout in seconds
|
||||
READ_TIMEOUT = 60 // in seconds
|
||||
MAX_REQUEST_SIZE = 1024 * 1024
|
||||
MAX_RESPONSE_SIZE = 1024 * 1024
|
||||
)
|
||||
|
||||
var (
|
||||
// No new requests in buffer
|
||||
EmptyRequestQueueError = fmt.Errorf("No incoming requests")
|
||||
// Next request in buffer isn't yet complete
|
||||
IncompleteRequestError = fmt.Errorf("Request incomplete")
|
||||
)
|
||||
|
||||
// Json serialization support
|
||||
type JsonCodec struct {
|
||||
c net.Conn
|
||||
d *json.Decoder
|
||||
c net.Conn
|
||||
reqBuffer []byte
|
||||
bytesInReqBuffer int
|
||||
reqLastPos int
|
||||
}
|
||||
|
||||
// Create new JSON coder instance
|
||||
func NewJsonCoder(conn net.Conn) ApiCoder {
|
||||
return &JsonCodec{
|
||||
c: conn,
|
||||
d: json.NewDecoder(conn),
|
||||
c: conn,
|
||||
reqBuffer: make([]byte, MAX_REQUEST_SIZE),
|
||||
bytesInReqBuffer: 0,
|
||||
reqLastPos: 0,
|
||||
}
|
||||
}
|
||||
|
||||
// Indication if the next request in the buffer is a batch request
|
||||
func (self *JsonCodec) isNextBatchReq() (bool, error) {
|
||||
for i := 0; i < self.bytesInReqBuffer; i++ {
|
||||
switch self.reqBuffer[i] {
|
||||
case 0x20, 0x09, 0x0a, 0x0d: // allow leading whitespace (JSON whitespace RFC4627)
|
||||
continue
|
||||
case 0x7b: // single req
|
||||
return false, nil
|
||||
case 0x5b: // batch req
|
||||
return true, nil
|
||||
default:
|
||||
return false, &json.InvalidUnmarshalError{}
|
||||
}
|
||||
}
|
||||
|
||||
return false, EmptyRequestQueueError
|
||||
}
|
||||
|
||||
// remove parsed request from buffer
|
||||
func (self *JsonCodec) resetReqbuffer(pos int) {
|
||||
copy(self.reqBuffer, self.reqBuffer[pos:self.bytesInReqBuffer])
|
||||
self.reqLastPos = 0
|
||||
self.bytesInReqBuffer -= pos
|
||||
}
|
||||
|
||||
// parse request in buffer
|
||||
func (self *JsonCodec) nextRequest() (requests []*shared.Request, isBatch bool, err error) {
|
||||
if isBatch, err := self.isNextBatchReq(); err == nil {
|
||||
if isBatch {
|
||||
requests = make([]*shared.Request, 0)
|
||||
for ; self.reqLastPos <= self.bytesInReqBuffer; self.reqLastPos++ {
|
||||
if err = json.Unmarshal(self.reqBuffer[:self.reqLastPos], &requests); err == nil {
|
||||
self.resetReqbuffer(self.reqLastPos)
|
||||
return requests, true, nil
|
||||
}
|
||||
}
|
||||
return nil, true, IncompleteRequestError
|
||||
} else {
|
||||
request := shared.Request{}
|
||||
for ; self.reqLastPos <= self.bytesInReqBuffer; self.reqLastPos++ {
|
||||
if err = json.Unmarshal(self.reqBuffer[:self.reqLastPos], &request); err == nil {
|
||||
requests := make([]*shared.Request, 1)
|
||||
requests[0] = &request
|
||||
self.resetReqbuffer(self.reqLastPos)
|
||||
return requests, false, nil
|
||||
}
|
||||
}
|
||||
return nil, true, IncompleteRequestError
|
||||
}
|
||||
} else {
|
||||
return nil, false, err
|
||||
}
|
||||
}
|
||||
|
||||
// Serialize obj to JSON and write it to conn
|
||||
func (self *JsonCodec) ReadRequest() (requests []*shared.Request, isBatch bool, err error) {
|
||||
if self.bytesInReqBuffer != 0 {
|
||||
req, batch, err := self.nextRequest()
|
||||
if err == nil {
|
||||
return req, batch, err
|
||||
}
|
||||
|
||||
if err != IncompleteRequestError {
|
||||
return nil, false, err
|
||||
}
|
||||
}
|
||||
|
||||
// no/incomplete request in buffer -> read more data first
|
||||
deadline := time.Now().Add(READ_TIMEOUT * time.Second)
|
||||
if err := self.c.SetDeadline(deadline); err != nil {
|
||||
return nil, false, err
|
||||
}
|
||||
|
||||
var retErr error
|
||||
for {
|
||||
var err error
|
||||
singleRequest := shared.Request{}
|
||||
if err = self.d.Decode(&singleRequest); err == nil {
|
||||
requests := make([]*shared.Request, 1)
|
||||
requests[0] = &singleRequest
|
||||
return requests, false, nil
|
||||
n, err := self.c.Read(self.reqBuffer[self.bytesInReqBuffer:])
|
||||
if err != nil {
|
||||
retErr = err
|
||||
break
|
||||
}
|
||||
|
||||
fmt.Printf("err %T %v\n", err)
|
||||
self.bytesInReqBuffer += n
|
||||
|
||||
if opErr, ok := err.(*net.OpError); ok {
|
||||
if opErr.Timeout() {
|
||||
break
|
||||
}
|
||||
requests, isBatch, err := self.nextRequest()
|
||||
if err == nil {
|
||||
return requests, isBatch, nil
|
||||
}
|
||||
|
||||
requests = make([]*shared.Request, 0)
|
||||
if err = self.d.Decode(&requests); err == nil {
|
||||
return requests, true, nil
|
||||
if err == IncompleteRequestError || err == EmptyRequestQueueError {
|
||||
continue // need more data
|
||||
}
|
||||
|
||||
if opErr, ok := err.(*net.OpError); ok {
|
||||
if opErr.Timeout() {
|
||||
break
|
||||
}
|
||||
}
|
||||
retErr = err
|
||||
break
|
||||
}
|
||||
|
||||
self.c.Close() // timeout
|
||||
return nil, false, fmt.Errorf("Timeout reading request")
|
||||
self.c.Close()
|
||||
return nil, false, retErr
|
||||
}
|
||||
|
||||
func (self *JsonCodec) ReadResponse() (interface{}, error) {
|
||||
|
|
|
@ -0,0 +1,177 @@
|
|||
package codec
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
"io"
|
||||
"net"
|
||||
"testing"
|
||||
"time"
|
||||
)
|
||||
|
||||
type jsonTestConn struct {
|
||||
buffer *bytes.Buffer
|
||||
}
|
||||
|
||||
func newJsonTestConn(data []byte) *jsonTestConn {
|
||||
return &jsonTestConn{
|
||||
buffer: bytes.NewBuffer(data),
|
||||
}
|
||||
}
|
||||
|
||||
func (self *jsonTestConn) Read(p []byte) (n int, err error) {
|
||||
return self.buffer.Read(p)
|
||||
}
|
||||
|
||||
func (self *jsonTestConn) Write(p []byte) (n int, err error) {
|
||||
return self.buffer.Write(p)
|
||||
}
|
||||
|
||||
func (self *jsonTestConn) Close() error {
|
||||
// not implemented
|
||||
return nil
|
||||
}
|
||||
|
||||
func (self *jsonTestConn) LocalAddr() net.Addr {
|
||||
// not implemented
|
||||
return nil
|
||||
}
|
||||
|
||||
func (self *jsonTestConn) RemoteAddr() net.Addr {
|
||||
// not implemented
|
||||
return nil
|
||||
}
|
||||
|
||||
func (self *jsonTestConn) SetDeadline(t time.Time) error {
|
||||
return nil
|
||||
}
|
||||
|
||||
func (self *jsonTestConn) SetReadDeadline(t time.Time) error {
|
||||
return nil
|
||||
}
|
||||
|
||||
func (self *jsonTestConn) SetWriteDeadline(t time.Time) error {
|
||||
return nil
|
||||
}
|
||||
|
||||
func TestJsonDecoderWithValidRequest(t *testing.T) {
|
||||
reqdata := []byte(`{"jsonrpc":"2.0","method":"modules","params":[],"id":64}`)
|
||||
decoder := newJsonTestConn(reqdata)
|
||||
|
||||
jsonDecoder := NewJsonCoder(decoder)
|
||||
requests, batch, err := jsonDecoder.ReadRequest()
|
||||
|
||||
if err != nil {
|
||||
t.Errorf("Read valid request failed - %v", err)
|
||||
}
|
||||
|
||||
if len(requests) != 1 {
|
||||
t.Errorf("Expected to get a single request but got %d", len(requests))
|
||||
}
|
||||
|
||||
if batch {
|
||||
t.Errorf("Got batch indication while expecting single request")
|
||||
}
|
||||
|
||||
if requests[0].Id != float64(64) {
|
||||
t.Errorf("Expected req.Id == 64 but got %v", requests[0].Id)
|
||||
}
|
||||
|
||||
if requests[0].Method != "modules" {
|
||||
t.Errorf("Expected req.Method == 'modules' got '%s'", requests[0].Method)
|
||||
}
|
||||
}
|
||||
|
||||
func TestJsonDecoderWithValidBatchRequest(t *testing.T) {
|
||||
reqdata := []byte(`[{"jsonrpc":"2.0","method":"modules","params":[],"id":64},
|
||||
{"jsonrpc":"2.0","method":"modules","params":[],"id":64}]`)
|
||||
decoder := newJsonTestConn(reqdata)
|
||||
|
||||
jsonDecoder := NewJsonCoder(decoder)
|
||||
requests, batch, err := jsonDecoder.ReadRequest()
|
||||
|
||||
if err != nil {
|
||||
t.Errorf("Read valid batch request failed - %v", err)
|
||||
}
|
||||
|
||||
if len(requests) != 2 {
|
||||
t.Errorf("Expected to get two requests but got %d", len(requests))
|
||||
}
|
||||
|
||||
if !batch {
|
||||
t.Errorf("Got no batch indication while expecting batch request")
|
||||
}
|
||||
|
||||
for i := 0; i < len(requests); i++ {
|
||||
if requests[i].Id != float64(64) {
|
||||
t.Errorf("Expected req.Id == 64 but got %v", requests[i].Id)
|
||||
}
|
||||
|
||||
if requests[i].Method != "modules" {
|
||||
t.Errorf("Expected req.Method == 'modules' got '%s'", requests[i].Method)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func TestJsonDecoderWithIncompleteMessage(t *testing.T) {
|
||||
reqdata := []byte(`{"jsonrpc":"2.0","method":"modules","pa`)
|
||||
decoder := newJsonTestConn(reqdata)
|
||||
|
||||
jsonDecoder := NewJsonCoder(decoder)
|
||||
requests, batch, err := jsonDecoder.ReadRequest()
|
||||
|
||||
if err != io.EOF {
|
||||
t.Errorf("Expected to read an incomplete request err but got %v", err)
|
||||
}
|
||||
|
||||
// remaining message
|
||||
decoder.Write([]byte(`rams":[],"id":64}`))
|
||||
requests, batch, err = jsonDecoder.ReadRequest()
|
||||
|
||||
if err != nil {
|
||||
t.Errorf("Read valid request failed - %v", err)
|
||||
}
|
||||
|
||||
if len(requests) != 1 {
|
||||
t.Errorf("Expected to get a single request but got %d", len(requests))
|
||||
}
|
||||
|
||||
if batch {
|
||||
t.Errorf("Got batch indication while expecting single request")
|
||||
}
|
||||
|
||||
if requests[0].Id != float64(64) {
|
||||
t.Errorf("Expected req.Id == 64 but got %v", requests[0].Id)
|
||||
}
|
||||
|
||||
if requests[0].Method != "modules" {
|
||||
t.Errorf("Expected req.Method == 'modules' got '%s'", requests[0].Method)
|
||||
}
|
||||
}
|
||||
|
||||
func TestJsonDecoderWithInvalidIncompleteMessage(t *testing.T) {
|
||||
reqdata := []byte(`{"jsonrpc":"2.0","method":"modules","pa`)
|
||||
decoder := newJsonTestConn(reqdata)
|
||||
|
||||
jsonDecoder := NewJsonCoder(decoder)
|
||||
requests, batch, err := jsonDecoder.ReadRequest()
|
||||
|
||||
if err != io.EOF {
|
||||
t.Errorf("Expected to read an incomplete request err but got %v", err)
|
||||
}
|
||||
|
||||
// remaining message
|
||||
decoder.Write([]byte(`rams":[],"id:64"}`))
|
||||
requests, batch, err = jsonDecoder.ReadRequest()
|
||||
|
||||
if err == nil {
|
||||
t.Errorf("Expected an error but got nil")
|
||||
}
|
||||
|
||||
if len(requests) != 0 {
|
||||
t.Errorf("Expected to get no requests but got %d", len(requests))
|
||||
}
|
||||
|
||||
if batch {
|
||||
t.Errorf("Got batch indication while expecting non batch")
|
||||
}
|
||||
}
|
Loading…
Reference in New Issue