HTTPTimeServer powered by POCO C++ Libraries

// // HTTPTimeServer.cpp // // This sample demonstrates the HTTPServer and related classes. // // Copyright (c) 2005-2006, Applied Informatics Software Engineering GmbH. // and Contributors. // // SPDX-License-Identifier: BSL-1.0 // #include "Poco/Net/HTTPServer.h" #include "Poco/Net/HTTPRequestHandler.h" #include "Poco/Net/HTTPRequestHandlerFactory.h" #include "Poco/Net/HTTPServerParams.h" #include "Poco/Net/HTTPServerRequest.h" #include "Poco/Net/HTTPServerResponse.h" #include "Poco/Net/HTTPServerParams.h" #include "Poco/Net/ServerSocket.h" #include "Poco/Timestamp.h" #include "Poco/DateTimeFormatter.h" #include "Poco/DateTimeFormat.h" #include "Poco/Exception.h" #include "Poco/ThreadPool.h" #include "Poco/Util/ServerApplication.h" #include "Poco/Util/Option.h" #include "Poco/Util/OptionSet.h" #include "Poco/Util/HelpFormatter.h" #include using Poco::Net::ServerSocket; using Poco::Net::HTTPRequestHandler; using Poco::Net::HTTPRequestHandlerFactory; using Poco::Net::HTTPServer; using Poco::Net::HTTPServerRequest; using Poco::Net::HTTPServerResponse; using Poco::Net::HTTPServerParams; using Poco::Timestamp; using Poco::DateTimeFormatter; using Poco::DateTimeFormat; using Poco::ThreadPool; using Poco::Util::ServerApplication; using Poco::Util::Application; using Poco::Util::Option; using Poco::Util::OptionSet; using Poco::Util::HelpFormatter; class TimeRequestHandler: public HTTPRequestHandler /// Return a HTML document with the current date and time. { public: TimeRequestHandler(const std::string& format): _format(format) { } void handleRequest(HTTPServerRequest& request, HTTPServerResponse& response) { Application& app = Application::instance(); app.logger().information("Request from " + request.clientAddress().toString()); Timestamp now; std::string dt(DateTimeFormatter::format(now, _format)); response.setChunkedTransferEncoding(true); response.setContentType("text/html"); std::ostream& ostr = response.send(); ostr << "HTTPTimeServer powered by POCO C++ Libraries"; ostr << ""; ostr << "

"; ostr << dt; ostr << "

"; } private: std::string _format; }; class TimeRequestHandlerFactory: public HTTPRequestHandlerFactory { public: TimeRequestHandlerFactory(const std::string& format): _format(format) { } HTTPRequestHandler* createRequestHandler(const HTTPServerRequest& request) { if (request.getURI() == "/") return new TimeRequestHandler(_format); else return 0; } private: std::string _format; }; class HTTPTimeServer: public Poco::Util::ServerApplication /// The main application class. /// /// This class handles command-line arguments and /// configuration files. /// Start the HTTPTimeServer executable with the help /// option (/help on Windows, --help on Unix) for /// the available command line options. /// /// To use the sample configuration file (HTTPTimeServer.properties), /// copy the file to the directory where the HTTPTimeServer executable /// resides. If you start the debug version of the HTTPTimeServer /// (HTTPTimeServerd[.exe]), you must also create a copy of the configuration /// file named HTTPTimeServerd.properties. In the configuration file, you /// can specify the port on which the server is listening (default /// 9980) and the format of the date/time string sent back to the client. /// /// To test the TimeServer you can use any web browser (http://localhost:9980/). { public: HTTPTimeServer(): _helpRequested(false) { } ~HTTPTimeServer() { } protected: void initialize(Application& self) { loadConfiguration(); // load default configuration files, if present ServerApplication::initialize(self); } void uninitialize() { ServerApplication::uninitialize(); } void defineOptions(OptionSet& options) { ServerApplication::defineOptions(options); options.addOption( Option("help", "h", "display help information on command line arguments") .required(false) .repeatable(false)); } void handleOption(const std::string& name, const std::string& value) { ServerApplication::handleOption(name, value); if (name == "help") _helpRequested = true; } void displayHelp() { HelpFormatter helpFormatter(options()); helpFormatter.setCommand(commandName()); helpFormatter.setUsage("OPTIONS"); helpFormatter.setHeader("A web server that serves the current date and time."); helpFormatter.format(std::cout); } int main(const std::vector& args) { if (_helpRequested) { displayHelp(); } else { // get parameters from configuration file unsigned short port = (unsigned short) config().getInt("HTTPTimeServer.port", 9980); std::string format(config().getString("HTTPTimeServer.format", DateTimeFormat::SORTABLE_FORMAT)); int maxQueued = config().getInt("HTTPTimeServer.maxQueued", 100); int maxThreads = config().getInt("HTTPTimeServer.maxThreads", 16); ThreadPool::defaultPool().addCapacity(maxThreads); HTTPServerParams* pParams = new HTTPServerParams; pParams->setMaxQueued(maxQueued); pParams->setMaxThreads(maxThreads); // set-up a server socket ServerSocket svs(port); // set-up a HTTPServer instance HTTPServer srv(new TimeRequestHandlerFactory(format), svs, pParams); // start the HTTPServer srv.start(); // wait for CTRL-C or kill waitForTerminationRequest(); // Stop the HTTPServer srv.stop(); } return Application::EXIT_OK; } private: bool _helpRequested; }; int main(int argc, char** argv) { HTTPTimeServer app; return app.run(argc, argv); }