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c_ws.h
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c_ws.h
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/***************************************************
Copyright (C) 2018 Steffen Ochs
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
HISTORY: Please refer Github History
LITERATUR:
https://github.com/me-no-dev/ESPAsyncWebServer#async-websocket-plugin
****************************************************/
#ifdef WEBSOCKET
AsyncWebSocket ws("/ws");
void onWsEvent(AsyncWebSocket * server, AsyncWebSocketClient * client, AwsEventType type, void * arg, uint8_t *data, size_t len){
if(type == WS_EVT_CONNECT){
Serial.printf("ws[%s][%u] connect\n", server->url(), client->id());
client->printf("Hello Client %u :)", client->id());
client->ping();
} else if(type == WS_EVT_DISCONNECT){
Serial.printf("ws[%s][%u] disconnect: %u\n", server->url(), client->id());
} else if(type == WS_EVT_ERROR){
Serial.printf("ws[%s][%u] error(%u): %s\n", server->url(), client->id(), *((uint16_t*)arg), (char*)data);
} else if(type == WS_EVT_PONG){
Serial.printf("ws[%s][%u] pong[%u]: %s\n", server->url(), client->id(), len, (len)?(char*)data:"");
} else if(type == WS_EVT_DATA){
AwsFrameInfo * info = (AwsFrameInfo*)arg;
String msg = "";
if(info->final && info->index == 0 && info->len == len){
//the whole message is in a single frame and we got all of it's data
Serial.printf("ws[%s][%u] %s-message[%u]: ", server->url(), client->id(), (info->opcode == WS_TEXT)?"text":"binary", info->len);
if(info->opcode == WS_TEXT){
for(size_t i=0; i < info->len; i++) {
msg += (char) data[i];
}
} else {
char buff[3];
for(size_t i=0; i < info->len; i++) {
sprintf(buff, "%02x ", (uint8_t) data[i]);
msg += buff ;
}
}
Serial.printf("%s\n",msg.c_str());
if(info->opcode == WS_TEXT)
client->text("I got your text message\n");
else
client->binary("I got your binary message\n");
} else {
//message is comprised of multiple frames or the frame is split into multiple packets
if(info->index == 0){
if(info->num == 0)
Serial.printf("ws[%s][%u] %s-message start\n", server->url(), client->id(), (info->message_opcode == WS_TEXT)?"text":"binary");
Serial.printf("ws[%s][%u] frame[%u] start[%llu]\n", server->url(), client->id(), info->num, info->len);
}
Serial.printf("ws[%s][%u] frame[%u] %s[%llu - %llu]: ", server->url(), client->id(), info->num, (info->message_opcode == WS_TEXT)?"text":"binary", info->index, info->index + len);
if(info->opcode == WS_TEXT){
for(size_t i=0; i < info->len; i++) {
msg += (char) data[i];
}
} else {
char buff[3];
for(size_t i=0; i < info->len; i++) {
sprintf(buff, "%02x ", (uint8_t) data[i]);
msg += buff ;
}
}
Serial.printf("%s\n",msg.c_str());
if((info->index + len) == info->len){
Serial.printf("ws[%s][%u] frame[%u] end[%llu]\n", server->url(), client->id(), info->num, info->len);
if(info->final){
Serial.printf("ws[%s][%u] %s-message end\n", server->url(), client->id(), (info->message_opcode == WS_TEXT)?"text":"binary");
if(info->message_opcode == WS_TEXT)
client->text("I got your text message");
else
client->binary("I got your binary message");
}
}
}
}
}
String WebPage = "<!DOCTYPE html><html><style>input[type=\"text\"]{width: 90%; height: 3vh;}input[type=\"button\"]{width: 9%; height: 3.6vh;}.rxd{height: 90vh;}textarea{width: 99%; height: 100%; resize: none;}</style><script>var Socket;function start(){Socket=new WebSocket('ws://' + window.location.hostname + '/ws'); Socket.onmessage=function(evt){document.getElementById(\"rxConsole\").value +=evt.data;}}function enterpressed(){Socket.send(document.getElementById(\"txbuff\").value); document.getElementById(\"txbuff\").value=\"\";}</script><body onload=\"javascript:start();\"> <div><input class=\"txd\" type=\"text\" id=\"txbuff\" onkeydown=\"if(event.keyCode==13) enterpressed();\"><input class=\"txd\" type=\"button\" onclick=\"enterpressed();\" value=\"Send\" > </div><br><div class=\"rxd\"> <textarea id=\"rxConsole\" readonly></textarea> </div></body></html>";
void sendWS(char *buffer) {
ws.textAll((char*)buffer);
}
void setWebSocket() {
ws.onEvent(onWsEvent);
server.addHandler(&ws);
server.on("/serial",[](AsyncWebServerRequest *request) {
request->send(200, "text/html", WebPage);
});
}
#endif