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//
// HTTPStreamFactory.cpp
//
// Library: Net
// Package: HTTP
// Module: HTTPStreamFactory
//
// Copyright (c) 2005-2012, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
//
#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/HTTPCredentials.h"
#include "Poco/Net/NetException.h"
#include "Poco/URI.h"
#include "Poco/URIStreamOpener.h"
#include "Poco/UnbufferedStreamBuf.h"
#include "Poco/NullStream.h"
#include "Poco/StreamCopier.h"
#include "Poco/Format.h"
#include "Poco/Version.h"
using Poco::URIStreamFactory;
using Poco::URI;
using Poco::URIStreamOpener;
using Poco::UnbufferedStreamBuf;
namespace Poco {
namespace Net {
HTTPStreamFactory::HTTPStreamFactory():
_proxyPort(HTTPSession::HTTP_PORT)
{
}
HTTPStreamFactory::HTTPStreamFactory(const std::string& proxyHost, Poco::UInt16 proxyPort):
_proxyHost(proxyHost),
_proxyPort(proxyPort)
{
}
HTTPStreamFactory::HTTPStreamFactory(const std::string& proxyHost, Poco::UInt16 proxyPort, const std::string& proxyUsername, const std::string& proxyPassword):
_proxyHost(proxyHost),
_proxyPort(proxyPort),
_proxyUsername(proxyUsername),
_proxyPassword(proxyPassword)
{
}
HTTPStreamFactory::~HTTPStreamFactory()
{
}
std::istream* HTTPStreamFactory::open(const URI& uri)
{
poco_assert (uri.getScheme() == "http");
URI resolvedURI(uri);
URI proxyUri;
HTTPClientSession* pSession = 0;
HTTPResponse res;
bool retry = false;
bool authorize = false;
std::string username;
std::string password;
try
{
do
{
if (!pSession)
{
pSession = new HTTPClientSession(resolvedURI.getHost(), resolvedURI.getPort());
if (proxyUri.empty())
{
if (!_proxyHost.empty())
{
pSession->setProxy(_proxyHost, _proxyPort);
pSession->setProxyCredentials(_proxyUsername, _proxyPassword);
}
}
else
{
pSession->setProxy(proxyUri.getHost(), proxyUri.getPort());
if (!_proxyUsername.empty())
{
pSession->setProxyCredentials(_proxyUsername, _proxyPassword);
}
}
}
std::string path = resolvedURI.getPathAndQuery();
if (path.empty()) path = "/";
HTTPRequest req(HTTPRequest::HTTP_GET, path, HTTPMessage::HTTP_1_1);
if (authorize)
{
HTTPCredentials::extractCredentials(uri, username, password);
HTTPCredentials cred(username, password);
cred.authenticate(req, res);
}
req.set("User-Agent", Poco::format("poco/%d.%d.%d",
(POCO_VERSION >> 24) & 0xFF,
(POCO_VERSION >> 16) & 0xFF,
(POCO_VERSION >> 8) & 0xFF));
req.set("Accept", "*/*");
pSession->sendRequest(req);
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 ||
res.getStatus() == HTTPResponse::HTTP_TEMPORARY_REDIRECT);
if (moved)
{
resolvedURI.resolve(res.get("Location"));
if (!username.empty())
{
resolvedURI.setUserInfo(username + ":" + password);
}
throw URIRedirection(resolvedURI.toString());
}
else if (res.getStatus() == HTTPResponse::HTTP_OK)
{
return new HTTPResponseStream(rs, pSession);
}
else if (res.getStatus() == HTTPResponse::HTTP_USE_PROXY && !retry)
{
// The requested resource MUST be accessed through the proxy
// given by the Location field. The Location field gives the
// URI of the proxy. The recipient is expected to repeat this
// single request via the proxy. 305 responses MUST only be generated by origin servers.
// only use for one single request!
proxyUri.resolve(res.get("Location"));
delete pSession;
pSession = 0;
retry = true; // only allow useproxy once
}
else if (res.getStatus() == HTTPResponse::HTTP_UNAUTHORIZED && !authorize)
{
authorize = true;
retry = true;
Poco::NullOutputStream null;
Poco::StreamCopier::copyStream(rs, null);
}
else throw HTTPException(res.getReason(), uri.toString());
}
while (retry);
throw HTTPException("Too many redirects", uri.toString());
}
catch (...)
{
delete pSession;
throw;
}
}
void HTTPStreamFactory::registerFactory()
{
URIStreamOpener::defaultOpener().registerStreamFactory("http", new HTTPStreamFactory);
}
void HTTPStreamFactory::unregisterFactory()
{
URIStreamOpener::defaultOpener().unregisterStreamFactory("http");
}
} } // namespace Poco::Net
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