mirror of
https://github.com/VCMP-SqMod/SqMod.git
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270 lines
7.4 KiB
C++
270 lines
7.4 KiB
C++
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//
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// WebSocketServer.cpp
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//
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// This sample demonstrates the WebSocket class.
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//
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// Copyright (c) 2012, Applied Informatics Software Engineering GmbH.
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// and Contributors.
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//
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// SPDX-License-Identifier: BSL-1.0
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//
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#include "Poco/Net/HTTPServer.h"
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#include "Poco/Net/HTTPRequestHandler.h"
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#include "Poco/Net/HTTPRequestHandlerFactory.h"
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#include "Poco/Net/HTTPServerParams.h"
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#include "Poco/Net/HTTPServerRequest.h"
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#include "Poco/Net/HTTPServerResponse.h"
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#include "Poco/Net/HTTPServerParams.h"
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#include "Poco/Net/ServerSocket.h"
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#include "Poco/Net/WebSocket.h"
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#include "Poco/Net/NetException.h"
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#include "Poco/Util/ServerApplication.h"
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#include "Poco/Util/Option.h"
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#include "Poco/Util/OptionSet.h"
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#include "Poco/Util/HelpFormatter.h"
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#include "Poco/Format.h"
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#include <iostream>
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using Poco::Net::ServerSocket;
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using Poco::Net::WebSocket;
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using Poco::Net::WebSocketException;
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using Poco::Net::HTTPRequestHandler;
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using Poco::Net::HTTPRequestHandlerFactory;
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using Poco::Net::HTTPServer;
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using Poco::Net::HTTPServerRequest;
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using Poco::Net::HTTPResponse;
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using Poco::Net::HTTPServerResponse;
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using Poco::Net::HTTPServerParams;
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using Poco::Timestamp;
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using Poco::ThreadPool;
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using Poco::Util::ServerApplication;
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using Poco::Util::Application;
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using Poco::Util::Option;
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using Poco::Util::OptionSet;
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using Poco::Util::HelpFormatter;
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class PageRequestHandler: public HTTPRequestHandler
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/// Return a HTML document with some JavaScript creating
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/// a WebSocket connection.
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{
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public:
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void handleRequest(HTTPServerRequest& request, HTTPServerResponse& response)
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{
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response.setChunkedTransferEncoding(true);
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response.setContentType("text/html");
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std::ostream& ostr = response.send();
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ostr << "<html>";
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ostr << "<head>";
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ostr << "<title>WebSocketServer</title>";
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ostr << "<script type=\"text/javascript\">";
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ostr << "function WebSocketTest()";
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ostr << "{";
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ostr << " if (\"WebSocket\" in window)";
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ostr << " {";
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ostr << " var ws = new WebSocket(\"ws://" << request.serverAddress().toString() << "/ws\");";
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ostr << " ws.onopen = function()";
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ostr << " {";
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ostr << " ws.send(\"Hello, world!\");";
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ostr << " };";
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ostr << " ws.onmessage = function(evt)";
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ostr << " { ";
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ostr << " var msg = evt.data;";
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ostr << " alert(\"Message received: \" + msg);";
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ostr << " ws.close();";
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ostr << " };";
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ostr << " ws.onclose = function()";
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ostr << " { ";
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ostr << " alert(\"WebSocket closed.\");";
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ostr << " };";
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ostr << " }";
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ostr << " else";
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ostr << " {";
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ostr << " alert(\"This browser does not support WebSockets.\");";
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ostr << " }";
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ostr << "}";
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ostr << "</script>";
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ostr << "</head>";
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ostr << "<body>";
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ostr << " <h1>WebSocket Server</h1>";
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ostr << " <p><a href=\"javascript:WebSocketTest()\">Run WebSocket Script</a></p>";
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ostr << "</body>";
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ostr << "</html>";
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}
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};
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class WebSocketRequestHandler: public HTTPRequestHandler
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/// Handle a WebSocket connection.
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{
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public:
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void handleRequest(HTTPServerRequest& request, HTTPServerResponse& response)
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{
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Application& app = Application::instance();
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try
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{
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WebSocket ws(request, response);
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app.logger().information("WebSocket connection established.");
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char buffer[1024];
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int flags;
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int n;
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do
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{
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n = ws.receiveFrame(buffer, sizeof(buffer), flags);
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app.logger().information(Poco::format("Frame received (length=%d, flags=0x%x).", n, unsigned(flags)));
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ws.sendFrame(buffer, n, flags);
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}
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while (n > 0 && (flags & WebSocket::FRAME_OP_BITMASK) != WebSocket::FRAME_OP_CLOSE);
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app.logger().information("WebSocket connection closed.");
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}
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catch (WebSocketException& exc)
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{
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app.logger().log(exc);
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switch (exc.code())
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{
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case WebSocket::WS_ERR_HANDSHAKE_UNSUPPORTED_VERSION:
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response.set("Sec-WebSocket-Version", WebSocket::WEBSOCKET_VERSION);
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// fallthrough
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case WebSocket::WS_ERR_NO_HANDSHAKE:
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case WebSocket::WS_ERR_HANDSHAKE_NO_VERSION:
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case WebSocket::WS_ERR_HANDSHAKE_NO_KEY:
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response.setStatusAndReason(HTTPResponse::HTTP_BAD_REQUEST);
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response.setContentLength(0);
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response.send();
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break;
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}
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}
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}
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};
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class RequestHandlerFactory: public HTTPRequestHandlerFactory
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{
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public:
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HTTPRequestHandler* createRequestHandler(const HTTPServerRequest& request)
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{
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Application& app = Application::instance();
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app.logger().information("Request from "
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+ request.clientAddress().toString()
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+ ": "
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+ request.getMethod()
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+ " "
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+ request.getURI()
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+ " "
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+ request.getVersion());
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for (HTTPServerRequest::ConstIterator it = request.begin(); it != request.end(); ++it)
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{
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app.logger().information(it->first + ": " + it->second);
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}
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if(request.find("Upgrade") != request.end() && Poco::icompare(request["Upgrade"], "websocket") == 0)
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return new WebSocketRequestHandler;
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else
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return new PageRequestHandler;
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}
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};
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class WebSocketServer: public Poco::Util::ServerApplication
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/// The main application class.
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///
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/// This class handles command-line arguments and
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/// configuration files.
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/// Start the WebSocketServer executable with the help
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/// option (/help on Windows, --help on Unix) for
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/// the available command line options.
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///
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/// To use the sample configuration file (WebSocketServer.properties),
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/// copy the file to the directory where the WebSocketServer executable
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/// resides. If you start the debug version of the WebSocketServer
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/// (WebSocketServerd[.exe]), you must also create a copy of the configuration
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/// file named WebSocketServerd.properties. In the configuration file, you
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/// can specify the port on which the server is listening (default
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/// 9980) and the format of the date/time string sent back to the client.
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///
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/// To test the WebSocketServer you can use any web browser (http://localhost:9980/).
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{
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public:
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WebSocketServer(): _helpRequested(false)
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{
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}
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~WebSocketServer()
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{
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}
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protected:
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void initialize(Application& self)
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{
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loadConfiguration(); // load default configuration files, if present
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ServerApplication::initialize(self);
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}
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void uninitialize()
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{
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ServerApplication::uninitialize();
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}
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void defineOptions(OptionSet& options)
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{
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ServerApplication::defineOptions(options);
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options.addOption(
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Option("help", "h", "display help information on command line arguments")
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.required(false)
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.repeatable(false));
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}
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void handleOption(const std::string& name, const std::string& value)
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{
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ServerApplication::handleOption(name, value);
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if (name == "help")
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_helpRequested = true;
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}
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void displayHelp()
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{
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HelpFormatter helpFormatter(options());
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helpFormatter.setCommand(commandName());
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helpFormatter.setUsage("OPTIONS");
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helpFormatter.setHeader("A sample HTTP server supporting the WebSocket protocol.");
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helpFormatter.format(std::cout);
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}
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int main(const std::vector<std::string>& args)
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{
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if (_helpRequested)
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{
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displayHelp();
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}
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else
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{
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// get parameters from configuration file
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unsigned short port = (unsigned short) config().getInt("WebSocketServer.port", 9980);
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// set-up a server socket
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ServerSocket svs(port);
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// set-up a HTTPServer instance
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HTTPServer srv(new RequestHandlerFactory, svs, new HTTPServerParams);
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// start the HTTPServer
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srv.start();
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// wait for CTRL-C or kill
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waitForTerminationRequest();
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// Stop the HTTPServer
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srv.stop();
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}
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return Application::EXIT_OK;
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}
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private:
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bool _helpRequested;
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};
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POCO_SERVER_MAIN(WebSocketServer)
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