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HTTPFormServer.cpp

//
// HTTPFormServer.cpp
//
// $Id: //poco/Main/Net/samples/HTTPFormServer/src/HTTPFormServer.cpp#5 $
//
// This sample demonstrates the HTTPServer and HTMLForm classes.
//
// Copyright (c) 2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// Permission is hereby granted, free of charge, to any person or organization
// obtaining a copy of the software and accompanying documentation covered by
// this license (the "Software") to use, reproduce, display, distribute,
// execute, and transmit the Software, and to prepare derivative works of the
// Software, and to permit third-parties to whom the Software is furnished to
// do so, all subject to the following:
// 
// The copyright notices in the Software and this entire statement, including
// the above license grant, this restriction and the following disclaimer,
// must be included in all copies of the Software, in whole or in part, and
// all derivative works of the Software, unless such copies or derivative
// works are solely in the form of machine-executable object code generated by
// a source language processor.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//


#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/HTMLForm.h"
#include "Poco/Net/PartHandler.h"
#include "Poco/Net/MessageHeader.h"
#include "Poco/Net/ServerSocket.h"
#include "Poco/CountingStream.h"
#include "Poco/NullStream.h"
#include "Poco/StreamCopier.h"
#include "Poco/Exception.h"
#include "Poco/Util/ServerApplication.h"
#include "Poco/Util/Option.h"
#include "Poco/Util/OptionSet.h"
#include "Poco/Util/HelpFormatter.h"
#include <iostream>


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::Net::MessageHeader;
using Poco::Net::HTMLForm;
using Poco::Net::NameValueCollection;
using Poco::Util::ServerApplication;
using Poco::Util::Application;
using Poco::Util::Option;
using Poco::Util::OptionSet;
using Poco::Util::HelpFormatter;
using Poco::CountingInputStream;
using Poco::NullOutputStream;
using Poco::StreamCopier;


class MyPartHandler: public Poco::Net::PartHandler
{
public:
      MyPartHandler():
            _length(0)
      {
      }
      
      void handlePart(const MessageHeader& header, std::istream& stream)
      {
            _type = header.get("Content-Type", "(unspecified)");
            if (header.has("Content-Disposition"))
            {
                  std::string disp;
                  NameValueCollection params;
                  MessageHeader::splitParameters(header["Content-Disposition"], disp, params);
                  _name = params.get("name", "(unnamed)");
                  _fileName = params.get("filename", "(unnamed)");
            }
            
            CountingInputStream istr(stream);
            NullOutputStream ostr;
            StreamCopier::copyStream(istr, ostr);
            _length = istr.chars();
      }
      
      int length() const
      {
            return _length;
      }
      
      const std::string& name() const
      {
            return _name;
      }

      const std::string& fileName() const
      {
            return _fileName;
      }
      
      const std::string& contentType() const
      {
            return _type;
      }
      
private:
      int _length;
      std::string _type;
      std::string _name;
      std::string _fileName;
};


00131 class FormRequestHandler: public HTTPRequestHandler
      /// Return a HTML document with the current date and time.
{
public:
      FormRequestHandler() 
      {
      }
      
00139       void handleRequest(HTTPServerRequest& request, HTTPServerResponse& response)
      {
            Application& app = Application::instance();
            app.logger().information("Request from " + request.clientAddress().toString());

            MyPartHandler partHandler;
            HTMLForm form(request, request.stream(), partHandler);

            response.setChunkedTransferEncoding(true);
            response.setContentType("text/html");

            std::ostream& ostr = response.send();
            
            ostr <<
                  "<html>\n"
                  "<head>\n"
                  "<title>POCO Form Server Sample</title>\n"
                  "</head>\n"
                  "<body>\n"
                  "<h1>POCO Form Server Sample</h1>\n"
                  "<h2>GET Form</h2>\n"
                  "<form method=\"GET\" action=\"/form\">\n"
                  "<input type=\"text\" name=\"text\" size=\"31\">\n"
                  "<input type=\"submit\" value=\"GET\">\n"
                  "</form>\n"
                  "<h2>POST Form</h2>\n"
                  "<form method=\"POST\" action=\"/form\">\n"
                  "<input type=\"text\" name=\"text\" size=\"31\">\n"
                  "<input type=\"submit\" value=\"POST\">\n"
                  "</form>\n"
                  "<h2>File Upload</h2>\n"
                  "<form method=\"POST\" action=\"/form\" enctype=\"multipart/form-data\">\n"
                  "<input type=\"file\" name=\"file\" size=\"31\"> \n"
                  "<input type=\"submit\" value=\"Upload\">\n"
                  "</form>\n";
                  
            ostr << "<h2>Request</h2><p>\n";
            ostr << "Method: " << request.getMethod() << "<br>\n";
            ostr << "URI: " << request.getURI() << "<br>\n";
            NameValueCollection::ConstIterator it = request.begin();
            NameValueCollection::ConstIterator end = request.end();
            for (; it != end; ++it)
            {
                  ostr << it->first << ": " << it->second << "<br>\n";
            }
            ostr << "</p>";

            if (!form.empty())
            {
                  ostr << "<h2>Form</h2><p>\n";
                  it = form.begin();
                  end = form.end();
                  for (; it != end; ++it)
                  {
                        ostr << it->first << ": " << it->second << "<br>\n";
                  }
                  ostr << "</p>";
            }
            
            if (!partHandler.name().empty())
            {
                  ostr << "<h2>Upload</h2><p>\n";
                  ostr << "Name: " << partHandler.name() << "<br>\n";
                  ostr << "File Name: " << partHandler.fileName() << "<br>\n";
                  ostr << "Type: " << partHandler.contentType() << "<br>\n";
                  ostr << "Size: " << partHandler.length() << "<br>\n";
                  ostr << "</p>";
            }
            ostr << "</body>\n";
      }
};


class FormRequestHandlerFactory: public HTTPRequestHandlerFactory
{
public:
      FormRequestHandlerFactory()
      {
      }

      HTTPRequestHandler* createRequestHandler(const HTTPServerRequest& request)
      {
            return new FormRequestHandler;
      }
};


00226 class HTTPFormServer: public Poco::Util::ServerApplication
      /// The main application class.
      ///
      /// This class handles command-line arguments and
      /// configuration files.
      /// Start the HTTPFormServer executable with the help
      /// option (/help on Windows, --help on Unix) for
      /// the available command line options.
      ///
      /// To use the sample configuration file (HTTPFormServer.properties),
      /// copy the file to the directory where the HTTPFormServer executable
      /// resides. If you start the debug version of the HTTPFormServer
      /// (HTTPFormServerd[.exe]), you must also create a copy of the configuration
      /// file named HTTPFormServerd.properties. In the configuration file, you
      /// can specify the port on which the server is listening (default
      /// 9980) and the format of the date/Form string sent back to the client.
      ///
      /// To test the FormServer you can use any web browser (http://localhost:9980/).
{
public:
      HTTPFormServer(): _helpRequested(false)
      {
      }
      
      ~HTTPFormServer()
      {
      }

protected:
00255       void initialize(Application& self)
      {
            loadConfiguration(); // load default configuration files, if present
            ServerApplication::initialize(self);
      }
            
00261       void uninitialize()
      {
            ServerApplication::uninitialize();
      }

00266       void defineOptions(OptionSet& options)
      {
            ServerApplication::defineOptions(options);
            
            options.addOption(
                  Option("help", "h", "display help information on command line arguments")
                        .required(false)
                        .repeatable(false));
      }

00276       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 shows how to work with HTML forms.");
            helpFormatter.format(std::cout);
      }

00293       int main(const std::vector<std::string>& args)
      {
            if (_helpRequested)
            {
                  displayHelp();
            }
            else
            {
                  unsigned short port = (unsigned short) config().getInt("HTTPFormServer.port", 9980);
                  
                  // set-up a server socket
                  ServerSocket svs(port);
                  // set-up a HTTPServer instance
                  HTTPServer srv(new FormRequestHandlerFactory, svs, new HTTPServerParams);
                  // 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)
{
      HTTPFormServer app;
      return app.run(argc, argv);
}

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