websocket c++ example

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//============================================================================ // Name        : websocket.cpp // Author      : // Version     : // Copyright   : Your copyright notice // Description : Hello World in C++, Ansi-style //============================================================================   #include <iostream>   #include <Poco/Net/WebSocket.h> #include <Poco/Net/HTTPClientSession.h> #include <Poco/Net/HTTPRequest.h> #include <Poco/Net/HTTPResponse.h> #include <Poco/Net/ServerSocket.h> #include <Poco/Net/NetException.h> #include <Poco/Exception.h>   using Poco::Net::HTTPClientSession; using Poco::Net::HTTPRequest; using Poco::Net::HTTPResponse; using Poco::Net::HTTPServerRequest; using Poco::Net::HTTPServerResponse; using Poco::Net::WebSocket; using Poco::Net::WebSocketException; using Poco::Exception;   using namespace std;   int ws_main() {     char buffer[1024];     int flags;     int n;     std::string payload;       try {         HTTPClientSession cs("echo.websocket.org", 80);         HTTPRequest request(HTTPRequest::HTTP_GET, "/", "HTTP/1.1");         HTTPResponse response;         std::string cmd;           WebSocket * ws = new WebSocket(cs, request, response); // Causes the timeout           payload = "SGClient: Hello World!";         cout << "Send: SGClient: Hello World!" << endl;         ws->sendFrame(payload.data(), payload.size(), WebSocket::FRAME_TEXT);         n = ws->receiveFrame(buffer, sizeof(buffer), flags);         buffer[n] = '\0';         cout << "Received: " << buffer << endl;           while (cmd != "exit") {             cmd = "";             cout << "Please input[exit]:";             std::cin >> cmd;             ws->sendFrame(cmd.data(), cmd.size(), WebSocket::FRAME_TEXT);             n = ws->receiveFrame(buffer, sizeof(buffer), flags);             buffer[n] = '\0';             if (n > 0) {                 std::cout << "Receive: " << buffer << std::endl;             }         }           ws->shutdown();     } catch (Exception ex) {         cout << ex.displayText() << endl;         cout << ex.what() << endl;         return -1;     } }