Better ping/pong support

examples/ping_pong/.gitignore

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+venv

examples/ping_pong/CMakeLists.txt

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+#
+# Author: Benjamin Sergeant
+# Copyright (c) 2018 Machine Zone, Inc. All rights reserved.
+#
+
+cmake_minimum_required (VERSION 3.4.1)
+project (ping_pong)
+
+set (CMAKE_CXX_STANDARD 11)
+
+option(USE_TLS "Add TLS support" ON)
+
+add_subdirectory(${PROJECT_SOURCE_DIR}/../.. ixwebsocket)
+
+add_executable(ping_pong ping_pong.cpp)
+
+if (APPLE AND USE_TLS)
+    target_link_libraries(ping_pong "-framework foundation" "-framework security")
+endif()
+
+if (WIN32)
+    target_link_libraries(ping_pong wsock32 ws2_32)
+    add_definitions(-D_CRT_SECURE_NO_WARNINGS)
+endif()
+
+target_link_libraries(ping_pong ixwebsocket)
+install(TARGETS ping_pong DESTINATION bin)

examples/ping_pong/client.py

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+#!/usr/bin/env python
+
+import asyncio
+import websockets
+
+async def hello(uri):
+    async with websockets.connect(uri) as websocket:
+        await websocket.send("Hello world!")
+        response = await websocket.recv()
+        print(response)
+
+        pong_waiter = await websocket.ping('coucou')
+        ret = await pong_waiter   # only if you want to wait for the pong
+        print(ret)
+
+asyncio.get_event_loop().run_until_complete(
+    hello('ws://localhost:5678'))

examples/ping_pong/ping_pong.cpp

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+/*
+ *  ws_connect.cpp
+ *  Author: Benjamin Sergeant
+ *  Copyright (c) 2017-2018 Machine Zone, Inc. All rights reserved.
+ */
+
+#include <iostream>
+#include <sstream>
+#include <ixwebsocket/IXWebSocket.h>
+#include <ixwebsocket/IXSocket.h>
+
+using namespace ix;
+
+namespace
+{
+    void log(const std::string& msg)
+    {
+        std::cout << msg << std::endl;
+    }
+
+    class WebSocketPingPong
+    {
+        public:
+            WebSocketPingPong(const std::string& _url);
+
+            void subscribe(const std::string& channel);
+            void start();
+            void stop();
+
+            void ping(const std::string& text);
+
+        private:
+            std::string _url;
+            ix::WebSocket _webSocket;
+    };
+
+    WebSocketPingPong::WebSocketPingPong(const std::string& url) :
+        _url(url)
+    {
+        ;
+    }
+
+    void WebSocketPingPong::stop()
+    {
+        _webSocket.stop();
+    }
+
+    void WebSocketPingPong::start()
+    {
+        _webSocket.configure(_url);
+
+        std::stringstream ss;
+        log(std::string("Connecting to url: ") + _url);
+
+        _webSocket.setOnMessageCallback(
+            [this](ix::WebSocketMessageType messageType, const std::string& str, ix::WebSocketErrorInfo error)
+            {
+                std::stringstream ss;
+                if (messageType == ix::WebSocket_MessageType_Open)
+                {
+                    log("ws_connect: connected");
+                }
+                else if (messageType == ix::WebSocket_MessageType_Close)
+                {
+                    log("ws_connect: disconnected");
+                }
+                else if (messageType == ix::WebSocket_MessageType_Message)
+                {
+                    ss << "ws_connect: received message: "
+                       << str;
+                    log(ss.str());
+                }
+                else if (messageType == ix::WebSocket_MessageType_Error)
+                {
+                    ss << "Connection error: " << error.reason      << std::endl;
+                    ss << "#retries: "         << error.retries     << std::endl;
+                    ss << "Wait time(ms): "    << error.wait_time   << std::endl;
+                    ss << "HTTP Status: "      << error.http_status << std::endl;
+                    log(ss.str());
+                }
+                else if (messageType == ix::WebSocket_MessageType_Pong)
+                {
+                    ss << "Invalid ix::WebSocketMessageType";
+                    log(ss.str());
+                }
+            });
+
+        _webSocket.start();
+    }
+
+    void WebSocketPingPong::ping(const std::string& text)
+    {
+        _webSocket.ping(text);
+    }
+
+    void interactiveMain(const std::string& url)
+    {
+        std::cout << "Type Ctrl-D to exit prompt..." << std::endl;
+        WebSocketPingPong webSocketPingPong(url);
+        webSocketPingPong.start();
+
+        while (true)
+        {
+            std::string text;
+            std::cout << "> " << std::flush;
+            std::getline(std::cin, text);
+
+            if (!std::cin)
+            {
+                break;
+            }
+
+            webSocketPingPong.ping(text);
+        }
+
+        std::cout << std::endl;
+        webSocketPingPong.stop();
+    }
+}
+
+int main(int argc, char** argv)
+{
+    if (argc != 2)
+    {
+        std::cerr << "Usage: ping_pong <url>" << std::endl;
+        return 1;
+    }
+    std::string url = argv[1];
+
+    Socket::init();
+    interactiveMain(url);
+    return 0;
+}

examples/ping_pong/server.py

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+#!/usr/bin/env python
+
+import asyncio
+import websockets
+
+async def echo(websocket, path):
+    async for message in websocket:
+        print(message)
+        await websocket.send(message)
+
+asyncio.get_event_loop().run_until_complete(
+    websockets.serve(echo, 'localhost', 5678))
+asyncio.get_event_loop().run_forever()

examples/ping_pong/test.sh

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+#!/bin/sh
+
+(cd build ; make)
+./build/ping_pong ws://localhost:5678