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HTTPStreamFactory.cpp

//
// HTTPStreamFactory.cpp
//
// $Id: //poco/1.2/Net/src/HTTPStreamFactory.cpp#1 $
//
// Library: Net
// Package: HTTP
// Module:  HTTPStreamFactory
//
// Copyright (c) 2005-2006, 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/HTTPStreamFactory.h"
#include "Poco/Net/HTTPClientSession.h"
#include "Poco/Net/HTTPIOStream.h"
#include "Poco/Net/HTTPRequest.h"
#include "Poco/Net/HTTPResponse.h"
#include "Poco/Net/NetException.h"
#include "Poco/URI.h"
#include "Poco/URIStreamOpener.h"
#include "Poco/UnbufferedStreamBuf.h"


using Poco::URIStreamFactory;
using Poco::URI;
using Poco::URIStreamOpener;
using Poco::UnbufferedStreamBuf;


namespace Poco {
namespace Net {


HTTPStreamFactory::HTTPStreamFactory():
      _proxyPort(HTTPSession::HTTP_PORT)
{
}


00064 HTTPStreamFactory::HTTPStreamFactory(const std::string& proxyHost, Poco::UInt16 proxyPort):
      _proxyHost(proxyHost),
      _proxyPort(proxyPort)
{
}


00071 HTTPStreamFactory::~HTTPStreamFactory()
{
}


00076 std::istream* HTTPStreamFactory::open(const URI& uri)
{
      poco_assert (uri.getScheme() == "http");

      URI resolvedURI(uri);
      HTTPClientSession* pSession = 0;
      try
      {
            int redirects = 0;
            do
            {
                  pSession = new HTTPClientSession(resolvedURI.getHost(), resolvedURI.getPort());
                  pSession->setProxy(_proxyHost, _proxyPort);
                  std::string path = resolvedURI.getPathAndQuery();
                  if (path.empty()) path = "/";
                  HTTPRequest req(HTTPRequest::HTTP_GET, path, HTTPMessage::HTTP_1_1);
                  pSession->sendRequest(req);
                  HTTPResponse res;
                  std::istream& rs = pSession->receiveResponse(res);
                  bool moved = (res.getStatus() == HTTPResponse::HTTP_MOVED_PERMANENTLY || 
                                res.getStatus() == HTTPResponse::HTTP_FOUND || 
                                res.getStatus() == HTTPResponse::HTTP_SEE_OTHER);
                  if (moved)
                  {
                        resolvedURI.resolve(res.get("Location"));
                        delete pSession;
                        if (resolvedURI.getScheme() != "http") throw UnsupportedRedirectException(uri.toString());
                        ++redirects;
                  }
                  else if (res.getStatus() == HTTPResponse::HTTP_OK)
                  {
                        return new HTTPResponseStream(rs, pSession);
                  }
                  else throw HTTPException(res.getReason(), uri.toString());
            }
            while (redirects < MAX_REDIRECTS);
            throw HTTPException("Too many redirects", uri.toString());
      }
      catch (...)
      {
            delete pSession;
            throw;
      }
}


00122 void HTTPStreamFactory::registerFactory()
{
      URIStreamOpener::defaultOpener().registerStreamFactory("http", new HTTPStreamFactory);
}


} } // namespace Poco::Net

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