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ESPAsyncWebServer
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ESPAsyncWebServer/src/ESPAsyncWebServer.h

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/*
Asynchronous WebServer library for Espressif MCUs
Copyright (c) 2016 Hristo Gochkov. All rights reserved.
This file is part of the esp8266 core for Arduino environment.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef _ESPAsyncWebServer_H_
#define _ESPAsyncWebServer_H_
#include "Arduino.h"
#include <functional>
#include "FS.h"
#include "StringArray.h"
#ifdef ESP32
#include <WiFi.h>
#include <AsyncTCP.h>
#elif defined(ESP8266)
#include <ESP8266WiFi.h>
#include <ESPAsyncTCP.h>
#else
#error Platform not supported
#endif
#ifdef ASYNCWEBSERVER_REGEX
#define ASYNCWEBSERVER_REGEX_ATTRIBUTE
#else
#define ASYNCWEBSERVER_REGEX_ATTRIBUTE __attribute__((warning("ASYNCWEBSERVER_REGEX not defined")))
#endif
#define DEBUGF(...) //Serial.printf(__VA_ARGS__)
class AsyncWebServer;
class AsyncWebServerRequest;
class AsyncWebServerResponse;
class AsyncWebHeader;
class AsyncWebParameter;
class AsyncWebRewrite;
class AsyncWebHandler;
class AsyncStaticWebHandler;
class AsyncCallbackWebHandler;
class AsyncResponseStream;
#ifndef WEBSERVER_H
typedef enum {
HTTP_GET = 0b00000001,
HTTP_POST = 0b00000010,
HTTP_DELETE = 0b00000100,
HTTP_PUT = 0b00001000,
HTTP_PATCH = 0b00010000,
HTTP_HEAD = 0b00100000,
HTTP_OPTIONS = 0b01000000,
HTTP_ANY = 0b01111111,
} WebRequestMethod;
#endif
//if this value is returned when asked for data, packet will not be sent and you will be asked for data again
#define RESPONSE_TRY_AGAIN 0xFFFFFFFF
typedef uint8_t WebRequestMethodComposite;
typedef std::function<void(void)> ArDisconnectHandler;
/*
* PARAMETER :: Chainable object to hold GET/POST and FILE parameters
* */
class AsyncWebParameter {
private:
String _name;
String _value;
size_t _size;
bool _isForm;
bool _isFile;
public:
AsyncWebParameter(const String& name, const String& value, bool form=false, bool file=false, size_t size=0): _name(name), _value(value), _size(size), _isForm(form), _isFile(file){}
const String& name() const { return _name; }
const String& value() const { return _value; }
size_t size() const { return _size; }
bool isPost() const { return _isForm; }
bool isFile() const { return _isFile; }
};
/*
* HEADER :: Chainable object to hold the headers
* */
class AsyncWebHeader {
private:
String _name;
String _value;
public:
AsyncWebHeader(const String& name, const String& value): _name(name), _value(value){}
AsyncWebHeader(const String& data): _name(), _value(){
if(!data) return;
int index = data.indexOf(':');
if (index < 0) return;
_name = data.substring(0, index);
_value = data.substring(index + 2);
}
~AsyncWebHeader(){}
const String& name() const { return _name; }
const String& value() const { return _value; }
String toString() const { return String(_name+": "+_value+"\r\n"); }
};
/*
* REQUEST :: Each incoming Client is wrapped inside a Request and both live together until disconnect
* */
typedef enum { RCT_NOT_USED = -1, RCT_DEFAULT = 0, RCT_HTTP, RCT_WS, RCT_EVENT, RCT_MAX } RequestedConnectionType;
typedef std::function<size_t(uint8_t*, size_t, size_t)> AwsResponseFiller;
typedef std::function<String(const String&)> AwsTemplateProcessor;
class AsyncWebServerRequest {
using File = fs::File;
using FS = fs::FS;
friend class AsyncWebServer;
friend class AsyncCallbackWebHandler;
private:
AsyncClient* _client;
AsyncWebServer* _server;
AsyncWebHandler* _handler;
AsyncWebServerResponse* _response;
StringArray _interestingHeaders;
ArDisconnectHandler _onDisconnectfn;
String _temp;
uint8_t _parseState;
uint8_t _version;
WebRequestMethodComposite _method;
String _url;
String _host;
String _contentType;
String _boundary;
String _authorization;
RequestedConnectionType _reqconntype;
void _removeNotInterestingHeaders();
bool _isDigest;
bool _isMultipart;
bool _isPlainPost;
bool _expectingContinue;
size_t _contentLength;
size_t _parsedLength;
LinkedList<AsyncWebHeader *> _headers;
LinkedList<AsyncWebParameter *> _params;
LinkedList<String *> _pathParams;
uint8_t _multiParseState;
uint8_t _boundaryPosition;
size_t _itemStartIndex;
size_t _itemSize;
String _itemName;
String _itemFilename;
String _itemType;
String _itemValue;
uint8_t *_itemBuffer;
size_t _itemBufferIndex;
bool _itemIsFile;
void _onPoll();
void _onAck(size_t len, uint32_t time);
void _onError(int8_t error);
void _onTimeout(uint32_t time);
void _onDisconnect();
void _onData(void *buf, size_t len);
void _addParam(AsyncWebParameter*);
void _addPathParam(const char *param);
bool _parseReqHead();
bool _parseReqHeader();
void _parseLine();
void _parsePlainPostChar(uint8_t data);
void _parseMultipartPostByte(uint8_t data, bool last);
void _addGetParams(const String& params);
void _handleUploadStart();
void _handleUploadByte(uint8_t data, bool last);
void _handleUploadEnd();
public:
File _tempFile;
void *_tempObject;
AsyncWebServerRequest(AsyncWebServer*, AsyncClient*);
~AsyncWebServerRequest();
AsyncClient* client(){ return _client; }
uint8_t version() const { return _version; }
WebRequestMethodComposite method() const { return _method; }
const String& url() const { return _url; }
const String& host() const { return _host; }
const String& contentType() const { return _contentType; }
size_t contentLength() const { return _contentLength; }
bool multipart() const { return _isMultipart; }
const char * methodToString() const;
const char * requestedConnTypeToString() const;
RequestedConnectionType requestedConnType() const { return _reqconntype; }
bool isExpectedRequestedConnType(RequestedConnectionType erct1, RequestedConnectionType erct2 = RCT_NOT_USED, RequestedConnectionType erct3 = RCT_NOT_USED);
void onDisconnect (ArDisconnectHandler fn);
//hash is the string representation of:
// base64(user:pass) for basic or
// user:realm:md5(user:realm:pass) for digest
bool authenticate(const char * hash);
bool authenticate(const char * username, const char * password, const char * realm = NULL, bool passwordIsHash = false);
void requestAuthentication(const char * realm = NULL, bool isDigest = true);
void setHandler(AsyncWebHandler *handler){ _handler = handler; }
void addInterestingHeader(const String& name);
void redirect(const String& url);
void send(AsyncWebServerResponse *response);
void send(int code, const String& contentType=String(), const String& content=String());
void send(FS &fs, const String& path, const String& contentType=String(), bool download=false, AwsTemplateProcessor callback=nullptr);
void send(File content, const String& path, const String& contentType=String(), bool download=false, AwsTemplateProcessor callback=nullptr);
void send(Stream &stream, const String& contentType, size_t len, AwsTemplateProcessor callback=nullptr);
void send(const String& contentType, size_t len, AwsResponseFiller callback, AwsTemplateProcessor templateCallback=nullptr);
void sendChunked(const String& contentType, AwsResponseFiller callback, AwsTemplateProcessor templateCallback=nullptr);
void send_P(int code, const String& contentType, const uint8_t * content, size_t len, AwsTemplateProcessor callback=nullptr);
void send_P(int code, const String& contentType, PGM_P content, AwsTemplateProcessor callback=nullptr);
AsyncWebServerResponse *beginResponse(int code, const String& contentType=String(), const String& content=String());
AsyncWebServerResponse *beginResponse(FS &fs, const String& path, const String& contentType=String(), bool download=false, AwsTemplateProcessor callback=nullptr);
AsyncWebServerResponse *beginResponse(File content, const String& path, const String& contentType=String(), bool download=false, AwsTemplateProcessor callback=nullptr);
AsyncWebServerResponse *beginResponse(Stream &stream, const String& contentType, size_t len, AwsTemplateProcessor callback=nullptr);
AsyncWebServerResponse *beginResponse(const String& contentType, size_t len, AwsResponseFiller callback, AwsTemplateProcessor templateCallback=nullptr);
AsyncWebServerResponse *beginChunkedResponse(const String& contentType, AwsResponseFiller callback, AwsTemplateProcessor templateCallback=nullptr);
AsyncResponseStream *beginResponseStream(const String& contentType, size_t bufferSize=1460);
AsyncWebServerResponse *beginResponse_P(int code, const String& contentType, const uint8_t * content, size_t len, AwsTemplateProcessor callback=nullptr);
AsyncWebServerResponse *beginResponse_P(int code, const String& contentType, PGM_P content, AwsTemplateProcessor callback=nullptr);
size_t headers() const; // get header count
bool hasHeader(const String& name) const; // check if header exists
bool hasHeader(const __FlashStringHelper * data) const; // check if header exists
AsyncWebHeader* getHeader(const String& name) const;
AsyncWebHeader* getHeader(const __FlashStringHelper * data) const;
AsyncWebHeader* getHeader(size_t num) const;
size_t params() const; // get arguments count
bool hasParam(const String& name, bool post=false, bool file=false) const;
bool hasParam(const __FlashStringHelper * data, bool post=false, bool file=false) const;
AsyncWebParameter* getParam(const String& name, bool post=false, bool file=false) const;
AsyncWebParameter* getParam(const __FlashStringHelper * data, bool post, bool file) const;
AsyncWebParameter* getParam(size_t num) const;
size_t args() const { return params(); } // get arguments count
const String& arg(const String& name) const; // get request argument value by name
const String& arg(const __FlashStringHelper * data) const; // get request argument value by F(name)
const String& arg(size_t i) const; // get request argument value by number
const String& argName(size_t i) const; // get request argument name by number
bool hasArg(const char* name) const; // check if argument exists
bool hasArg(const __FlashStringHelper * data) const; // check if F(argument) exists
const String& ASYNCWEBSERVER_REGEX_ATTRIBUTE pathArg(size_t i) const;
const String& header(const char* name) const;// get request header value by name
const String& header(const __FlashStringHelper * data) const;// get request header value by F(name)
const String& header(size_t i) const; // get request header value by number
const String& headerName(size_t i) const; // get request header name by number
String urlDecode(const String& text) const;
};
/*
* FILTER :: Callback to filter AsyncWebRewrite and AsyncWebHandler (done by the Server)
* */
typedef std::function<bool(AsyncWebServerRequest *request)> ArRequestFilterFunction;
bool ON_STA_FILTER(AsyncWebServerRequest *request);
bool ON_AP_FILTER(AsyncWebServerRequest *request);
/*
* REWRITE :: One instance can be handle any Request (done by the Server)
* */
class AsyncWebRewrite {
protected:
String _from;
String _toUrl;
String _params;
ArRequestFilterFunction _filter;
public:
AsyncWebRewrite(const char* from, const char* to): _from(from), _toUrl(to), _params(String()), _filter(NULL){
int index = _toUrl.indexOf('?');
if (index > 0) {
_params = _toUrl.substring(index +1);
_toUrl = _toUrl.substring(0, index);
}
}
virtual ~AsyncWebRewrite(){}
AsyncWebRewrite& setFilter(ArRequestFilterFunction fn) { _filter = fn; return *this; }
bool filter(AsyncWebServerRequest *request) const { return _filter == NULL || _filter(request); }
const String& from(void) const { return _from; }
const String& toUrl(void) const { return _toUrl; }
const String& params(void) const { return _params; }
virtual bool match(AsyncWebServerRequest *request) { return from() == request->url() && filter(request); }
};
/*
* HANDLER :: One instance can be attached to any Request (done by the Server)
* */
class AsyncWebHandler {
protected:
ArRequestFilterFunction _filter;
String _username;
String _password;
public:
AsyncWebHandler():_username(""), _password(""){}
AsyncWebHandler& setFilter(ArRequestFilterFunction fn) { _filter = fn; return *this; }
AsyncWebHandler& setAuthentication(const char *username, const char *password){ _username = String(username);_password = String(password); return *this; };
bool filter(AsyncWebServerRequest *request){ return _filter == NULL || _filter(request); }
virtual ~AsyncWebHandler(){}
virtual bool canHandle(AsyncWebServerRequest *request __attribute__((unused))){
return false;
}
virtual void handleRequest(AsyncWebServerRequest *request __attribute__((unused))){}
virtual void handleUpload(AsyncWebServerRequest *request __attribute__((unused)), const String& filename __attribute__((unused)), size_t index __attribute__((unused)), uint8_t *data __attribute__((unused)), size_t len __attribute__((unused)), bool final __attribute__((unused))){}
virtual void handleBody(AsyncWebServerRequest *request __attribute__((unused)), uint8_t *data __attribute__((unused)), size_t len __attribute__((unused)), size_t index __attribute__((unused)), size_t total __attribute__((unused))){}
virtual bool isRequestHandlerTrivial(){return true;}
};
/*
* RESPONSE :: One instance is created for each Request (attached by the Handler)
* */
typedef enum {
RESPONSE_SETUP, RESPONSE_HEADERS, RESPONSE_CONTENT, RESPONSE_WAIT_ACK, RESPONSE_END, RESPONSE_FAILED
} WebResponseState;
class AsyncWebServerResponse {
protected:
int _code;
LinkedList<AsyncWebHeader *> _headers;
String _contentType;
size_t _contentLength;
bool _sendContentLength;
bool _chunked;
size_t _headLength;
size_t _sentLength;
size_t _ackedLength;
size_t _writtenLength;
WebResponseState _state;
const char* _responseCodeToString(int code);
public:
AsyncWebServerResponse();
virtual ~AsyncWebServerResponse();
virtual void setCode(int code);
virtual void setContentLength(size_t len);
virtual void setContentType(const String& type);
virtual void addHeader(const String& name, const String& value);
virtual String _assembleHead(uint8_t version);
virtual bool _started() const;
virtual bool _finished() const;
virtual bool _failed() const;
virtual bool _sourceValid() const;
virtual void _respond(AsyncWebServerRequest *request);
virtual size_t _ack(AsyncWebServerRequest *request, size_t len, uint32_t time);
};
/*
* SERVER :: One instance
* */
typedef std::function<void(AsyncWebServerRequest *request)> ArRequestHandlerFunction;
typedef std::function<void(AsyncWebServerRequest *request, const String& filename, size_t index, uint8_t *data, size_t len, bool final)> ArUploadHandlerFunction;
typedef std::function<void(AsyncWebServerRequest *request, uint8_t *data, size_t len, size_t index, size_t total)> ArBodyHandlerFunction;
class AsyncWebServer {
protected:
AsyncServer _server;
LinkedList<AsyncWebRewrite*> _rewrites;
LinkedList<AsyncWebHandler*> _handlers;
AsyncCallbackWebHandler* _catchAllHandler;
public:
AsyncWebServer(uint16_t port);
~AsyncWebServer();
void begin();
void end();
#if ASYNC_TCP_SSL_ENABLED
void onSslFileRequest(AcSSlFileHandler cb, void* arg);
void beginSecure(const char *cert, const char *private_key_file, const char *password);
#endif
AsyncWebRewrite& addRewrite(AsyncWebRewrite* rewrite);
bool removeRewrite(AsyncWebRewrite* rewrite);
AsyncWebRewrite& rewrite(const char* from, const char* to);
AsyncWebHandler& addHandler(AsyncWebHandler* handler);
bool removeHandler(AsyncWebHandler* handler);
AsyncCallbackWebHandler& on(const char* uri, ArRequestHandlerFunction onRequest);
AsyncCallbackWebHandler& on(const char* uri, WebRequestMethodComposite method, ArRequestHandlerFunction onRequest);
AsyncCallbackWebHandler& on(const char* uri, WebRequestMethodComposite method, ArRequestHandlerFunction onRequest, ArUploadHandlerFunction onUpload);
AsyncCallbackWebHandler& on(const char* uri, WebRequestMethodComposite method, ArRequestHandlerFunction onRequest, ArUploadHandlerFunction onUpload, ArBodyHandlerFunction onBody);
AsyncStaticWebHandler& serveStatic(const char* uri, fs::FS& fs, const char* path, const char* cache_control = NULL);
void onNotFound(ArRequestHandlerFunction fn); //called when handler is not assigned
void onFileUpload(ArUploadHandlerFunction fn); //handle file uploads
void onRequestBody(ArBodyHandlerFunction fn); //handle posts with plain body content (JSON often transmitted this way as a request)
void reset(); //remove all writers and handlers, with onNotFound/onFileUpload/onRequestBody
void _handleDisconnect(AsyncWebServerRequest *request);
void _attachHandler(AsyncWebServerRequest *request);
void _rewriteRequest(AsyncWebServerRequest *request);
};
class DefaultHeaders {
using headers_t = LinkedList<AsyncWebHeader *>;
headers_t _headers;
DefaultHeaders()
:_headers(headers_t([](AsyncWebHeader *h){ delete h; }))
{}
public:
using ConstIterator = headers_t::ConstIterator;
void addHeader(const String& name, const String& value){
_headers.add(new AsyncWebHeader(name, value));
}
ConstIterator begin() const { return _headers.begin(); }
ConstIterator end() const { return _headers.end(); }
DefaultHeaders(DefaultHeaders const &) = delete;
DefaultHeaders &operator=(DefaultHeaders const &) = delete;
static DefaultHeaders &Instance() {
static DefaultHeaders instance;
return instance;
}
};
#include "WebResponseImpl.h"
#include "WebHandlerImpl.h"
#include "AsyncWebSocket.h"
#include "AsyncEventSource.h"
#endif /* _AsyncWebServer_H_ */
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