Add AsyncWebSocket plugin

2016-04-23 15:11:32 +03:00
parent d65e4bd4e5
commit 8d67809acf
8 changed files with 1355 additions and 668 deletions
--- a/src/AsyncWebSocket.cpp
+++ b/src/AsyncWebSocket.cpp
@@ -0,0 +1,860 @@
+/*
+  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
+*/
+#include "Arduino.h"
+#include "AsyncWebSocket.h"
+
+#include <libb64/cencode.h>
+
+#ifndef ESP8266
+extern "C" {
+typedef struct {
+    uint32_t state[5];
+    uint32_t count[2];
+    unsigned char buffer[64];
+} SHA1_CTX;
+
+void SHA1Transform(uint32_t state[5], const unsigned char buffer[64]);
+void SHA1Init(SHA1_CTX* context);
+void SHA1Update(SHA1_CTX* context, const unsigned char* data, uint32_t len);
+void SHA1Final(unsigned char digest[20], SHA1_CTX* context);
+}
+#else
+#include <Hash.h>
+#endif
+
+
+size_t webSocketSendFrameWindow(AsyncClient *client){
+  if(!client->canSend())
+    return 0;
+  size_t space = client->space();
+  if(space < 9)
+    return 0;
+  return space - 8;
+}
+
+size_t webSocketSendFrame(AsyncClient *client, bool final, uint8_t opcode, bool mask, uint8_t *data, size_t len){
+  if(!client->canSend())
+    return 0;
+  size_t space = client->space();
+  if(space < 2)
+    return 0;
+  uint8_t mbuf[4] = {0,0,0,0};
+  uint8_t headLen = 2;
+  if(len && mask){
+    headLen += 4;
+    mbuf[0] = rand() % 0xFF;
+    mbuf[1] = rand() % 0xFF;
+    mbuf[2] = rand() % 0xFF;
+    mbuf[3] = rand() % 0xFF;
+    os_printf("frame mask: 0x%02x 0x%02x 0x%02x 0x%02x\n", mbuf[0], mbuf[1], mbuf[2], mbuf[3]);
+  }
+  if(len > 125)
+    headLen += 2;
+  if(space < headLen)
+    return 0;
+  space -= headLen;
+
+  if(len > space) len = space;
+
+  uint8_t *buf = (uint8_t*)malloc(headLen);
+  if(buf == NULL){
+    os_printf("could not malloc %u bytes for frame header\n", headLen);
+    return 0;
+  }
+
+  buf[0] = opcode & 0x0F;
+  if(final)
+    buf[0] |= 0x80;
+  if(len < 126)
+    buf[1] = len & 0x7F;
+  else {
+    buf[1] = 126;
+    buf[2] = (uint8_t)((len >> 8) & 0xFF);
+    buf[3] = (uint8_t)(len & 0xFF);
+  }
+  if(len && mask){
+    buf[1] |= 0x80;
+    memcpy(buf + (headLen - 4), mbuf, 4);
+  }
+  if(client->add((const char *)buf, headLen) != headLen){
+    os_printf("error adding %lu header bytes\n", headLen);
+    free(buf);
+    return 0;
+  }
+  free(buf);
+
+  if(len){
+    if(len && mask){
+      os_printf("masking the payload: %lu\n", len);
+      size_t i;
+      for(i=0;i<len;i++)
+        data[i] = data[i] ^ mbuf[i%4];
+    }
+    if(client->add((const char *)data, len) != len){
+      os_printf("error adding %lu data bytes\n", len);
+      return 0;
+    }
+  }
+  if(!client->send()){
+    os_printf("error sending frame: %lu\n", headLen+len);
+    return 0;
+  }
+  return len;
+}
+
+
+
+
+/*
+ * Control Frame
+ */
+
+class AsyncWebSocketControl {
+  private:
+    uint8_t _opcode;
+    uint8_t *_data;
+    size_t _len;
+    bool _mask;
+    bool _finished;
+  public:
+    AsyncWebSocketControl * next;
+    AsyncWebSocketControl(uint8_t opcode, uint8_t *data=NULL, size_t len=0, bool mask=false)
+      :_opcode(opcode)
+      ,_len(len)
+      ,_mask(len && mask)
+      ,_finished(false)
+      ,next(NULL){
+      if(data == NULL)
+        _len = 0;
+      if(_len){
+        if(_len > 125)
+          _len = 125;
+        _data = (uint8_t*)malloc(_len);
+        if(_data == NULL)
+          _len = 0;
+        else memcpy(_data, data, len);
+      } else _data = NULL;
+    }
+    ~AsyncWebSocketControl(){
+      if(_data != NULL)
+        free(_data);
+    }
+    bool finished(){ return _finished; }
+    uint8_t opcode(){ return _opcode; }
+    uint8_t len(){ return _len + 2; }
+    size_t send(AsyncClient *client){
+      _finished = true;
+      return webSocketSendFrame(client, true, _opcode & 0x0F, _mask, _data, _len);
+    }
+};
+
+/*
+ * Basic Buffered Message
+ */
+
+class AsyncWebSocketBasicMessage: public AsyncWebSocketMessage {
+  private:
+    uint8_t * _data;
+    size_t _len;
+    size_t _sent;
+    size_t _ack;
+    size_t _acked;
+
+  public:
+    AsyncWebSocketBasicMessage(const char * data, size_t len, uint8_t opcode=WS_TEXT, bool mask=false)
+      :_len(len)
+      ,_sent(0)
+      ,_ack(0)
+      ,_acked(0)
+    {
+      _opcode = opcode & 0x07;
+      _mask = mask;
+      _data = (uint8_t*)malloc(_len+1);
+      if(_data == NULL){
+        _len = 0;
+        _status = WS_MSG_ERROR;
+      } else {
+        _status = WS_MSG_SENDING;
+        memcpy(_data, data, _len);
+        _data[_len] = 0;
+      }
+    }
+    virtual ~AsyncWebSocketBasicMessage(){
+      if(_data != NULL)
+        free(_data);
+    }
+    virtual bool betweenFrames(){ return _acked == _ack; }
+    virtual void ack(size_t len, uint32_t time){
+      _acked += len;
+      if(_sent == _len && _acked == _ack){
+        _status = WS_MSG_SENT;
+      }
+    }
+    virtual size_t send(AsyncClient *client){
+      if(_status != WS_MSG_SENDING)
+        return 0;
+      if(_acked < _ack){
+        return 0;
+      }
+      if(_sent == _len){
+        if(_acked == _ack)
+          _status = WS_MSG_SENT;
+        return 0;
+      }
+      size_t window = webSocketSendFrameWindow(client);
+      size_t toSend = _len - _sent;
+      if(window < toSend) toSend = window;
+      bool final = ((toSend + _sent) == _len);
+      size_t sent = webSocketSendFrame(client, final, (_sent == 0)?_opcode:WS_CONTINUATION, _mask, (uint8_t*)(_data+_sent), toSend);
+      _sent += sent;
+      uint8_t headLen = ((sent < 126)?2:4)+(_mask*4);
+      _ack += sent + headLen;
+      return sent;
+    }
+};
+
+
+
+
+
+/*
+ * Async WebSocket Client
+ */
+
+AsyncWebSocketClient::AsyncWebSocketClient(AsyncWebServerRequest *request, AsyncWebSocket *server){
+  _client = request->client();
+  _server = server;
+  _clientId = _server->_getNextId();
+  _status = WS_CONNECTED;
+  _controlQueue = NULL;
+  _messageQueue = NULL;
+  _pstate = 0;
+  next = NULL;
+  delete request;
+  _client->onError([](void *r, AsyncClient* c, int8_t error){ ((AsyncWebSocketClient*)(r))->_onError(error); }, this);
+  _client->onAck([](void *r, AsyncClient* c, size_t len, uint32_t time){ ((AsyncWebSocketClient*)(r))->_onAck(len, time); }, this);
+  _client->onDisconnect([](void *r, AsyncClient* c){ ((AsyncWebSocketClient*)(r))->_onDisconnect(); }, this);
+  _client->onTimeout([](void *r, AsyncClient* c, uint32_t time){ ((AsyncWebSocketClient*)(r))->_onTimeout(time); }, this);
+  _client->onData([](void *r, AsyncClient* c, void *buf, size_t len){ ((AsyncWebSocketClient*)(r))->_onData(buf, len); }, this);
+  _client->onPoll([](void *r, AsyncClient* c){ ((AsyncWebSocketClient*)(r))->_onPoll(); }, this);
+  _server->_addClient(this);
+  _server->_handleEvent(this, WS_EVT_CONNECT, NULL, NULL, 0);
+}
+
+AsyncWebSocketClient::~AsyncWebSocketClient(){
+  while(_messageQueue != NULL){
+    AsyncWebSocketMessage * m = _messageQueue;
+    _messageQueue = _messageQueue->next;
+    delete(m);
+  }
+  while(_controlQueue != NULL){
+    AsyncWebSocketControl * c = _controlQueue;
+    _controlQueue = _controlQueue->next;
+    delete(c);
+  }
+  _server->_handleEvent(this, WS_EVT_DISCONNECT, NULL, NULL, 0);
+}
+
+void AsyncWebSocketClient::_onAck(size_t len, uint32_t time){
+  if(_controlQueue != NULL){
+    AsyncWebSocketControl *controlMessage = _controlQueue;
+    if(controlMessage->finished()){
+      _controlQueue = _controlQueue->next;
+      len -= controlMessage->len();
+      if(_status == WS_DISCONNECTING && controlMessage->opcode() == WS_DISCONNECT){
+        delete controlMessage;
+        _status = WS_DISCONNECTED;
+        _client->close(true);
+        return;
+      }
+      delete controlMessage;
+    }
+  }
+  if(len && _messageQueue != NULL){
+    _messageQueue->ack(len, time);
+  }
+  _runQueue();
+}
+
+void AsyncWebSocketClient::_onPoll(){
+  if(_client->canSend() && (_controlQueue != NULL || _messageQueue != NULL)){
+    _runQueue();
+  }
+  //ToDo: check for last activity here and maybe ping?
+  //ping();
+}
+
+void AsyncWebSocketClient::_runQueue(){
+  while(_messageQueue != NULL && _messageQueue->finished()){
+    AsyncWebSocketMessage * m = _messageQueue;
+    _messageQueue = _messageQueue->next;
+    delete(m);
+  }
+
+  if(_controlQueue != NULL && (_messageQueue == NULL || _messageQueue->betweenFrames()) && webSocketSendFrameWindow(_client) > (size_t)(_controlQueue->len() - 1)){
+    AsyncWebSocketControl *control = _controlQueue;
+    control->send(_client);
+  } else if(_messageQueue != NULL && _messageQueue->betweenFrames() && webSocketSendFrameWindow(_client)){
+    _messageQueue->send(_client);
+  }
+}
+
+void AsyncWebSocketClient::_queueMessage(AsyncWebSocketMessage *dataMessage){
+  if(dataMessage == NULL)
+    return;
+  if(_status != WS_CONNECTED){
+    delete dataMessage;
+    return;
+  }
+  if(_messageQueue == NULL){
+    _messageQueue = dataMessage;
+  } else {
+    AsyncWebSocketMessage * m = _messageQueue;
+    while(m->next != NULL) m = m->next;
+    m->next = dataMessage;
+  }
+  if(_client->canSend())
+    _runQueue();
+}
+
+void AsyncWebSocketClient::_queueControl(AsyncWebSocketControl *controlMessage){
+  if(controlMessage == NULL)
+    return;
+  if(_controlQueue == NULL){
+    _controlQueue = controlMessage;
+  } else {
+    AsyncWebSocketControl * m = _controlQueue;
+    while(m->next != NULL) m = m->next;
+    m->next = controlMessage;
+  }
+  if(_client->canSend())
+    _runQueue();
+}
+
+void AsyncWebSocketClient::close(uint16_t code, const char * message){
+  if(_status != WS_CONNECTED)
+    return;
+  if(code){
+    uint8_t packetLen = 2;
+    if(message != NULL){
+      size_t mlen = strlen(message);
+      if(mlen > 123) mlen = 123;
+      packetLen += mlen;
+    }
+    char * buf = (char*)malloc(packetLen);
+    if(buf != NULL){
+      buf[0] = (uint8_t)(code >> 8);
+      buf[1] = (uint8_t)(code & 0xFF);
+      if(message != NULL){
+        memcpy(buf+2, message, packetLen -2);
+      }
+      _queueControl(new AsyncWebSocketControl(WS_DISCONNECT,(uint8_t*)buf,packetLen));
+      free(buf);
+      return;
+    }
+  }
+  _queueControl(new AsyncWebSocketControl(WS_DISCONNECT));
+}
+
+void AsyncWebSocketClient::ping(uint8_t *data, size_t len){
+  if(_status == WS_CONNECTED)
+    _queueControl(new AsyncWebSocketControl(WS_PING, data, len));
+}
+
+void AsyncWebSocketClient::_onError(int8_t){
+
+}
+
+void AsyncWebSocketClient::_onTimeout(uint32_t time){
+  os_printf("_onTimeout: %u, state: %s\n", time, _client->stateToString());
+  _client->close();
+}
+
+void AsyncWebSocketClient::_onDisconnect(){
+  _client->free();
+  delete _client;
+  _server->_handleDisconnect(this);
+}
+
+void AsyncWebSocketClient::_onData(void *buf, size_t plen){
+  uint8_t *fdata = (uint8_t*)buf;
+  uint8_t * data = fdata;
+  if(!_pstate){
+    _pinfo.index = 0;
+    _pinfo.final = (fdata[0] & 0x80) != 0;
+    _pinfo.opcode = fdata[0] & 0x0F;
+    _pinfo.masked = (fdata[1] & 0x80) != 0;
+    _pinfo.len = fdata[1] & 0x7F;
+    data += 2;
+    plen = plen - 2;
+    if(_pinfo.len == 126){
+      _pinfo.len = fdata[3] | (uint16_t)(fdata[2]) << 8;
+      data += 2;
+      plen = plen - 2;
+    } else if(_pinfo.len == 127){
+      _pinfo.len = fdata[9] | (uint16_t)(fdata[8]) << 8 | (uint32_t)(fdata[7]) << 16 | (uint32_t)(fdata[6]) << 24 | (uint64_t)(fdata[5]) << 32 | (uint64_t)(fdata[4]) << 40 | (uint64_t)(fdata[3]) << 48 | (uint64_t)(fdata[2]) << 56;
+      data += 8;
+      plen = plen - 8;
+    }
+
+    if(_pinfo.masked){
+      memcpy(_pinfo.mask, data, 4);
+      data += 4;
+      plen = plen - 4;
+      size_t i;
+      for(i=0;i<plen;i++)
+        data[i] = data[i] ^ _pinfo.mask[(_pinfo.index+i)%4];
+    }
+  } else {
+    if(_pinfo.masked){
+      size_t i;
+      for(i=0;i<plen;i++)
+        data[i] = data[i] ^ _pinfo.mask[(_pinfo.index+i)%4];
+    }
+  }
+  if((plen + _pinfo.index) < _pinfo.len){
+    _pstate = 1;
+
+    if(_pinfo.index == 0){
+      if(_pinfo.opcode){
+        _pinfo.message_opcode = _pinfo.opcode;
+        _pinfo.num = 0;
+      } else _pinfo.num += 1;
+    }
+    _server->_handleEvent(this, WS_EVT_DATA, (void *)&_pinfo, (uint8_t*)data, plen);
+
+    _pinfo.index += plen;
+  } else if((plen + _pinfo.index) == _pinfo.len){
+    _pstate = 0;
+    if(_pinfo.opcode == WS_DISCONNECT){
+      if(plen){
+        uint16_t reasonCode = (uint16_t)(data[0] << 8) + data[1];
+        char * reasonString = (char*)(data+2);
+        if(reasonCode > 1001){
+          _server->_handleEvent(this, WS_EVT_ERROR, (void *)&reasonCode, (uint8_t*)reasonString, strlen(reasonString));
+        }
+      }
+      if(_status == WS_DISCONNECTING){
+        _status = WS_DISCONNECTED;
+        _client->close(true);
+      } else {
+        _status = WS_DISCONNECTING;
+        _queueControl(new AsyncWebSocketControl(WS_DISCONNECT, data, plen));
+      }
+    } else if(_pinfo.opcode == WS_PING){
+      _queueControl(new AsyncWebSocketControl(WS_PONG, data, plen));
+    } else if(_pinfo.opcode == WS_PONG){
+      _server->_handleEvent(this, WS_EVT_PONG, NULL, (uint8_t*)data, plen);
+    } else if(_pinfo.opcode < 8){//continuation or text/binary frame
+      _server->_handleEvent(this, WS_EVT_DATA, (void *)&_pinfo, (uint8_t*)data, plen);
+    }
+  } else {
+    os_printf("frame error: len: %u, index: %llu, total: %llu\n", plen, _pinfo.index, _pinfo.len);
+    //what should we do?
+  }
+}
+
+size_t AsyncWebSocketClient::printf(const char *format, ...) {
+  va_list arg;
+  va_start(arg, format);
+#ifdef ESP8266
+  //ToDo: figure out a way around this
+  size_t len = 1440;
+#else
+  size_t len = vsnprintf(NULL, 0, format, arg);
+#endif
+  char * msg = (char*)malloc(len+1);
+  if(msg == NULL){
+    va_end(arg);
+    return 0;
+  }
+  len = vsnprintf(msg, len, format, arg);
+  msg[len] = 0;
+  text(msg);
+  va_end(arg);
+  free(msg);
+  return len;
+}
+
+void AsyncWebSocketClient::text(const char * message, size_t len){
+  _queueMessage(new AsyncWebSocketBasicMessage(message, len));
+}
+void AsyncWebSocketClient::text(const char * message){
+  text(message, strlen(message));
+}
+void AsyncWebSocketClient::text(uint8_t * message, size_t len){
+  text((const char *)message, len);
+}
+void AsyncWebSocketClient::text(char * message){
+  text(message, strlen(message));
+}
+void AsyncWebSocketClient::text(String &message){
+  text(message.c_str(), message.length());
+}
+
+void AsyncWebSocketClient::binary(const char * message, size_t len){
+  _queueMessage(new AsyncWebSocketBasicMessage(message, len, WS_BINARY));
+}
+void AsyncWebSocketClient::binary(const char * message){
+  binary(message, strlen(message));
+}
+void AsyncWebSocketClient::binary(uint8_t * message, size_t len){
+  binary((const char *)message, len);
+}
+void AsyncWebSocketClient::binary(char * message){
+  binary(message, strlen(message));
+}
+void AsyncWebSocketClient::binary(String &message){
+  binary(message.c_str(), message.length());
+}
+
+
+
+
+/*
+ * Async Web Socket - Each separate socket location
+ */
+
+AsyncWebSocket::AsyncWebSocket(String url)
+  :_url(url)
+  ,_clients(NULL)
+  ,_cNextId(0)
+{
+  _eventHandler = NULL;
+}
+
+AsyncWebSocket::~AsyncWebSocket(){}
+
+void AsyncWebSocket::_handleEvent(AsyncWebSocketClient * client, AwsEventType type, void * arg, uint8_t *data, size_t len){
+  if(_eventHandler != NULL){
+    _eventHandler(this, client, type, arg, data, len);
+  }
+}
+
+void AsyncWebSocket::_addClient(AsyncWebSocketClient * client){
+  if(_clients == NULL){
+    _clients = client;
+    return;
+  }
+  AsyncWebSocketClient * c = _clients;
+  while(c->next != NULL) c = c->next;
+  c->next = client;
+}
+
+void AsyncWebSocket::_handleDisconnect(AsyncWebSocketClient * client){
+  if(_clients == NULL){
+    os_printf("we have no clients to disconnect!");
+    return;
+  }
+  if(_clients->id() == client->id()){
+    _clients = client->next;
+    delete client;
+    return;
+  }
+  AsyncWebSocketClient * c = _clients;
+  while(c->next != NULL && c->next->id() != client->id()) c = c->next;
+  if(c->next == NULL){
+    os_printf("we could not find client [%u] to disconnect!", client->id());
+    return;
+  }
+  c->next = client->next;
+  delete client;
+}
+
+size_t AsyncWebSocket::count(){
+  size_t i = 0;
+  AsyncWebSocketClient * c = _clients;
+  while(c != NULL){
+    if(c->status() == WS_CONNECTED)
+      i++;
+    c = c->next;
+  }
+  return i;
+}
+
+AsyncWebSocketClient * AsyncWebSocket::client(uint32_t id){
+  AsyncWebSocketClient * c = _clients;
+  while(c != NULL && c->id() != id)
+    c = c->next;
+  if(c != NULL && c->status() == WS_CONNECTED)
+    return c;
+  return NULL;
+}
+
+
+void AsyncWebSocket::close(uint32_t id, uint16_t code, const char * message){
+  AsyncWebSocketClient * c = client(id);
+  if(c != NULL)
+    c->close(code, message);
+}
+
+void AsyncWebSocket::closeAll(uint16_t code, const char * message){
+  AsyncWebSocketClient * c = _clients;
+  while(c != NULL){
+    if(c->status() == WS_CONNECTED)
+      c->close(code, message);
+    c = c->next;
+  }
+}
+
+void AsyncWebSocket::ping(uint32_t id, uint8_t *data, size_t len){
+  AsyncWebSocketClient * c = client(id);
+  if(c != NULL)
+    c->ping(data, len);
+}
+
+void AsyncWebSocket::pingAll(uint8_t *data, size_t len){
+  AsyncWebSocketClient * c = _clients;
+  while(c != NULL){
+    if(c->status() == WS_CONNECTED)
+      c->ping(data, len);
+    c = c->next;
+  }
+
+}
+
+void AsyncWebSocket::text(uint32_t id, const char * message, size_t len){
+  AsyncWebSocketClient * c = client(id);
+  if(c != NULL)
+    c->text(message, len);
+}
+
+void AsyncWebSocket::textAll(const char * message, size_t len){
+  AsyncWebSocketClient * c = _clients;
+  while(c != NULL){
+    if(c->status() == WS_CONNECTED)
+      c->text(message, len);
+    c = c->next;
+  }
+}
+
+void AsyncWebSocket::binary(uint32_t id, const char * message, size_t len){
+  AsyncWebSocketClient * c = client(id);
+  if(c != NULL)
+    c->binary(message, len);
+}
+
+void AsyncWebSocket::binaryAll(const char * message, size_t len){
+  AsyncWebSocketClient * c = _clients;
+  while(c != NULL){
+    if(c->status() == WS_CONNECTED)
+      c->binary(message, len);
+    c = c->next;
+  }
+}
+
+void AsyncWebSocket::message(uint32_t id, AsyncWebSocketMessage *message){
+  AsyncWebSocketClient * c = client(id);
+  if(c != NULL)
+    c->message(message);
+}
+
+void AsyncWebSocket::messageAll(AsyncWebSocketMessage *message){
+  AsyncWebSocketClient * c = _clients;
+  while(c != NULL){
+    if(c->status() == WS_CONNECTED)
+      c->message(message);
+    c = c->next;
+  }
+}
+
+size_t AsyncWebSocket::printf(uint32_t id, const char *format, ...){
+  AsyncWebSocketClient * c = client(id);
+  if(c != NULL){
+    va_list arg;
+    va_start(arg, format);
+    size_t len = c->printf(format, arg);
+    va_end(arg);
+    return len;
+  }
+  return 0;
+}
+
+size_t AsyncWebSocket::printfAll(const char *format, ...) {
+  va_list arg;
+  va_start(arg, format);
+#ifdef ESP8266
+  //ToDo: figure out a way around this
+  size_t len = 1440;
+#else
+  size_t len = vsnprintf(NULL, 0, format, arg);
+#endif
+  char * msg = (char*)malloc(len+1);
+  if(msg == NULL){
+    va_end(arg);
+    return 0;
+  }
+  len = vsnprintf(msg, len, format, arg);
+  msg[len] = 0;
+  textAll(msg);
+  va_end(arg);
+  free(msg);
+  return len;
+}
+
+void AsyncWebSocket::text(uint32_t id, const char * message){
+  text(id, message, strlen(message));
+}
+void AsyncWebSocket::text(uint32_t id, uint8_t * message, size_t len){
+  text(id, (const char *)message, len);
+}
+void AsyncWebSocket::text(uint32_t id, char * message){
+  text(id, message, strlen(message));
+}
+void AsyncWebSocket::text(uint32_t id, String &message){
+  text(id, message.c_str(), message.length());
+}
+void AsyncWebSocket::textAll(const char * message){
+  textAll(message, strlen(message));
+}
+void AsyncWebSocket::textAll(uint8_t * message, size_t len){
+  textAll((const char *)message, len);
+}
+void AsyncWebSocket::textAll(char * message){
+  textAll(message, strlen(message));
+}
+void AsyncWebSocket::textAll(String &message){
+  textAll(message.c_str(), message.length());
+}
+void AsyncWebSocket::binary(uint32_t id, const char * message){
+  binary(id, message, strlen(message));
+}
+void AsyncWebSocket::binary(uint32_t id, uint8_t * message, size_t len){
+  binary(id, (const char *)message, len);
+}
+void AsyncWebSocket::binary(uint32_t id, char * message){
+  binary(id, message, strlen(message));
+}
+void AsyncWebSocket::binary(uint32_t id, String &message){
+  binary(id, message.c_str(), message.length());
+}
+void AsyncWebSocket::binaryAll(const char * message){
+  binaryAll(message, strlen(message));
+}
+void AsyncWebSocket::binaryAll(uint8_t * message, size_t len){
+  binaryAll((const char *)message, len);
+}
+void AsyncWebSocket::binaryAll(char * message){
+  binaryAll(message, strlen(message));
+}
+void AsyncWebSocket::binaryAll(String &message){
+  binaryAll(message.c_str(), message.length());
+}
+
+const char * WS_STR_CONNECTION = "Connection";
+const char * WS_STR_UPGRADE = "Upgrade";
+const char * WS_STR_ORIGIN = "Origin";
+const char * WS_STR_VERSION = "Sec-WebSocket-Version";
+const char * WS_STR_KEY = "Sec-WebSocket-Key";
+const char * WS_STR_PROTOCOL = "Sec-WebSocket-Protocol";
+const char * WS_STR_ACCEPT = "Sec-WebSocket-Accept";
+const char * WS_STR_UUID = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
+
+bool AsyncWebSocket::canHandle(AsyncWebServerRequest *request){
+  if(request->method() != HTTP_GET || !request->url().equals(_url))
+    return false;
+
+  request->addInterestingHeader(WS_STR_CONNECTION);
+  request->addInterestingHeader(WS_STR_UPGRADE);
+  request->addInterestingHeader(WS_STR_ORIGIN);
+  request->addInterestingHeader(WS_STR_VERSION);
+  request->addInterestingHeader(WS_STR_KEY);
+  request->addInterestingHeader(WS_STR_PROTOCOL);
+  return true;
+}
+
+void AsyncWebSocket::handleRequest(AsyncWebServerRequest *request){
+  if(!request->hasHeader(WS_STR_VERSION) || !request->hasHeader(WS_STR_KEY)){
+    request->send(400);
+    return;
+  }
+  AsyncWebHeader* version = request->getHeader(WS_STR_VERSION);
+  if(version->value().toInt() != 13){
+    AsyncWebServerResponse *response = request->beginResponse(400);
+    response->addHeader(WS_STR_VERSION,"13");
+    request->send(response);
+    return;
+  }
+  AsyncWebHeader* key = request->getHeader(WS_STR_KEY);
+  AsyncWebServerResponse *response = new AsyncWebSocketResponse(key->value(), this);
+  if(request->hasHeader(WS_STR_PROTOCOL)){
+    AsyncWebHeader* protocol = request->getHeader(WS_STR_PROTOCOL);
+    //ToDo: check protocol
+    response->addHeader(WS_STR_PROTOCOL, protocol->value());
+  }
+  request->send(response);
+}
+
+
+/*
+ * Response to Web Socket request - sends the authorization and detaches the TCP Client from the web server
+ */
+
+AsyncWebSocketResponse::AsyncWebSocketResponse(String key, AsyncWebSocket *server){
+  _server = server;
+  _code = 101;
+  uint8_t * hash = (uint8_t*)malloc(20);
+  if(hash == NULL){
+    _state = RESPONSE_FAILED;
+    return;
+  }
+  char * buffer = (char *) malloc(33);
+  if(buffer == NULL){
+    free(hash);
+    _state = RESPONSE_FAILED;
+    return;
+  }
+#ifdef ESP8266
+  sha1(key + WS_STR_UUID, hash);
+#else
+  key += WS_STR_UUID;
+  SHA1_CTX ctx;
+  SHA1Init(&ctx);
+  SHA1Update(&ctx, (const unsigned char*)key.c_str(), key.length());
+  SHA1Final(hash, &ctx);
+#endif
+  base64_encodestate _state;
+  base64_init_encodestate(&_state);
+  int len = base64_encode_block((const char *) hash, 20, buffer, &_state);
+  len = base64_encode_blockend((buffer + len), &_state);
+  addHeader(WS_STR_CONNECTION, WS_STR_UPGRADE);
+  addHeader(WS_STR_UPGRADE, "websocket");
+  addHeader(WS_STR_ACCEPT,buffer);
+  free(buffer);
+  free(hash);
+}
+
+void AsyncWebSocketResponse::_respond(AsyncWebServerRequest *request){
+  if(_state == RESPONSE_FAILED){
+    request->client()->close(true);
+    return;
+  }
+  String out = _assembleHead(request->version());
+  request->client()->write(out.c_str(), _headLength);
+  _state = RESPONSE_WAIT_ACK;
+}
+
+size_t AsyncWebSocketResponse::_ack(AsyncWebServerRequest *request, size_t len, uint32_t time){
+  if(len){
+    new AsyncWebSocketClient(request, _server);
+  }
+  return 0;
+}