esp8266: share port 80 with regular webserver (#575)

examples/esp8266/WebSocketServerHooked/WebSocketServerHooked.ino

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+/*
+ * WebSocketServerHooked.ino
+ *
+ *  Created on: 22.05.2015
+ *  Hooked on:  28.10.2020
+ *
+ */
+
+#include <Arduino.h>
+
+#include <ESP8266WiFi.h>
+#include <ESP8266WiFiMulti.h>
+#include <WebSockets4WebServer.h>
+#include <Hash.h>
+#include <ESP8266mDNS.h>
+
+ESP8266WiFiMulti WiFiMulti;
+
+ESP8266WebServer server(80);
+WebSockets4WebServer webSocket;
+
+#define USE_SERIAL Serial
+
+void webSocketEvent(uint8_t num, WStype_t type, uint8_t * payload, size_t length) {
+
+    switch(type) {
+        case WStype_DISCONNECTED:
+            USE_SERIAL.printf("[%u] Disconnected!\n", num);
+            break;
+        case WStype_CONNECTED:
+            {
+                IPAddress ip = webSocket.remoteIP(num);
+                USE_SERIAL.printf("[%u] Connected from %d.%d.%d.%d url: %s\n", num, ip[0], ip[1], ip[2], ip[3], payload);
+
+				// send message to client
+				webSocket.sendTXT(num, "Connected");
+            }
+            break;
+        case WStype_TEXT:
+            USE_SERIAL.printf("[%u] get Text: %s\n", num, payload);
+
+            // send message to client
+            // webSocket.sendTXT(num, "message here");
+
+            // send data to all connected clients
+            // webSocket.broadcastTXT("message here");
+            break;
+        case WStype_BIN:
+            USE_SERIAL.printf("[%u] get binary length: %u\n", num, length);
+            hexdump(payload, length);
+
+            // send message to client
+            // webSocket.sendBIN(num, payload, length);
+            break;
+    }
+
+}
+
+void setup() {
+    // USE_SERIAL.begin(921600);
+    USE_SERIAL.begin(115200);
+
+    //Serial.setDebugOutput(true);
+    USE_SERIAL.setDebugOutput(true);
+
+    USE_SERIAL.println();
+    USE_SERIAL.println();
+    USE_SERIAL.println();
+
+    for(uint8_t t = 4; t > 0; t--) {
+        USE_SERIAL.printf("[SETUP] BOOT WAIT %d...\n", t);
+        USE_SERIAL.flush();
+        delay(1000);
+    }
+
+    WiFiMulti.addAP("SSID", "passpasspass");
+
+    while(WiFiMulti.run() != WL_CONNECTED) {
+        delay(100);
+    }
+
+    server.on("/", []() {
+        server.send(200, "text/plain", "I am a regular webserver on port 80!\r\n");
+        server.send(200, "text/plain", "I am also a websocket server on '/ws' on the same port 80\r\n");
+    });
+
+    server.addHook(webSocket.hookForWebserver("/ws", webSocketEvent));
+
+    server.begin();
+    Serial.println("HTTP server started on port 80");
+    Serial.println("WebSocket server started on the same port");
+    Serial.printf("my network address is either 'arduinoWebsockets.local' (mDNS) or '%s'\n", WiFi.localIP().toString().c_str());
+
+    if (!MDNS.begin("arduinoWebsockets")) {
+        Serial.println("Error setting up MDNS responder!");
+    }
+}
+
+void loop() {
+    server.handleClient();
+    webSocket.loop();
+    MDNS.update();
+}

examples/esp8266/WebSocketServerHooked/emu

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+#!/bin/sh
+
+# linux script to compile&run arduinoWebSockets in a mock environment
+
+if [ -z "$ESP8266ARDUINO" ]; then
+    echo "please set ESP8266ARDUINO env-var to where esp8266/arduino sits"
+    exit 1
+fi
+
+set -e
+
+where=$(pwd)
+
+cd $ESP8266ARDUINO/tests/host/
+
+make -j FORCE32=0 \
+    ULIBDIRS=../../libraries/Hash/:~/dev/proj/arduino/libraries/arduinoWebSockets \
+    ${where}/WebSocketServerHooked
+
+valgrind ./bin/WebSocketServerHooked/WebSocketServerHooked -b "$@"

examples/esp8266/WebSocketServerHooked/ws-testclient.py

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+#!/usr/bin/env python3
+
+# python websocket client to test with
+# emulator: server is at ws://127.0.0.1:9080/ws
+# esp8266:  server is at ws:///ws
+# (uncomment the right line below)
+
+#uri = "ws://127.0.0.1:9080/ws"
+uri = "ws://arduinoWebsockets.local/ws"
+
+import websocket
+try:
+    import thread
+except ImportError:
+    import _thread as thread
+import time
+
+def on_message(ws, message):
+    print("message");
+    print(message)
+
+def on_error(ws, error):
+    print("error")
+    print(error)
+
+def on_close(ws):
+    print("### closed ###")
+
+def on_open(ws):
+    print("opened")
+    def run(*args):
+        for i in range(3):
+            time.sleep(1)
+            ws.send("Hello %d" % i)
+        time.sleep(1)
+        ws.close()
+        print("thread terminating...")
+    thread.start_new_thread(run, ())
+
+
+if __name__ == "__main__":
+    websocket.enableTrace(True)
+    ws = websocket.WebSocketApp(uri, on_message = on_message, on_error = on_error, on_close = on_close)
+    ws.on_open = on_open
+    ws.run_forever()