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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/net/chrome_network_delegate.h"
#include "base/logging.h"
#include "chrome/browser/custom_handlers/protocol_handler_registry.h"
#include "chrome/browser/extensions/extension_event_router_forwarder.h"
#include "chrome/browser/extensions/extension_info_map.h"
#include "chrome/browser/extensions/extension_proxy_api.h"
#include "chrome/browser/extensions/extension_webrequest_api.h"
#include "chrome/browser/prefs/pref_member.h"
#include "chrome/browser/task_manager/task_manager.h"
#include "chrome/common/pref_names.h"
#include "content/public/browser/browser_thread.h"
#include "net/base/host_port_pair.h"
#include "net/base/net_errors.h"
#include "net/base/net_log.h"
#include "net/http/http_request_headers.h"
#include "net/http/http_response_headers.h"
#include "net/url_request/url_request.h"
#if defined(ENABLE_CONFIGURATION_POLICY)
#include "chrome/browser/policy/url_blacklist_manager.h"
#endif
namespace {
// If the |request| failed due to problems with a proxy, forward the error to
// the proxy extension API.
void ForwardProxyErrors(net::URLRequest* request,
ExtensionEventRouterForwarder* event_router,
void* profile) {
if (request->status().status() == net::URLRequestStatus::FAILED) {
switch (request->status().error()) {
case net::ERR_PROXY_AUTH_UNSUPPORTED:
case net::ERR_PROXY_CONNECTION_FAILED:
case net::ERR_TUNNEL_CONNECTION_FAILED:
ExtensionProxyEventRouter::GetInstance()->OnProxyError(
event_router, profile, request->status().error());
}
}
}
} // namespace
ChromeNetworkDelegate::ChromeNetworkDelegate(
ExtensionEventRouterForwarder* event_router,
ExtensionInfoMap* extension_info_map,
const policy::URLBlacklistManager* url_blacklist_manager,
void* profile,
BooleanPrefMember* enable_referrers)
: event_router_(event_router),
profile_(profile),
extension_info_map_(extension_info_map),
enable_referrers_(enable_referrers),
url_blacklist_manager_(url_blacklist_manager) {
DCHECK(event_router);
DCHECK(enable_referrers);
}
ChromeNetworkDelegate::~ChromeNetworkDelegate() {}
// static
void ChromeNetworkDelegate::InitializeReferrersEnabled(
BooleanPrefMember* enable_referrers,
PrefService* pref_service) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
enable_referrers->Init(prefs::kEnableReferrers, pref_service, NULL);
enable_referrers->MoveToThread(BrowserThread::IO);
}
int ChromeNetworkDelegate::OnBeforeURLRequest(
net::URLRequest* request,
net::OldCompletionCallback* callback,
GURL* new_url) {
#if defined(ENABLE_CONFIGURATION_POLICY)
// TODO(joaodasilva): This prevents extensions from seeing URLs that are
// blocked. However, an extension might redirect the request to another URL,
// which is not blocked.
if (url_blacklist_manager_ &&
url_blacklist_manager_->IsURLBlocked(request->url())) {
// URL access blocked by policy.
scoped_refptr<net::NetLog::EventParameters> params;
params = new net::NetLogStringParameter("url", request->url().spec());
request->net_log().AddEvent(
net::NetLog::TYPE_CHROME_POLICY_ABORTED_REQUEST, params);
return net::ERR_NETWORK_ACCESS_DENIED;
}
#endif
if (!enable_referrers_->GetValue())
request->set_referrer(std::string());
return ExtensionWebRequestEventRouter::GetInstance()->OnBeforeRequest(
profile_, extension_info_map_.get(), request, callback, new_url);
}
int ChromeNetworkDelegate::OnBeforeSendHeaders(
net::URLRequest* request,
net::OldCompletionCallback* callback,
net::HttpRequestHeaders* headers) {
return ExtensionWebRequestEventRouter::GetInstance()->OnBeforeSendHeaders(
profile_, extension_info_map_.get(), request, callback, headers);
}
void ChromeNetworkDelegate::OnSendHeaders(
net::URLRequest* request,
const net::HttpRequestHeaders& headers) {
ExtensionWebRequestEventRouter::GetInstance()->OnSendHeaders(
profile_, extension_info_map_.get(), request, headers);
}
int ChromeNetworkDelegate::OnHeadersReceived(
net::URLRequest* request,
net::OldCompletionCallback* callback,
net::HttpResponseHeaders* original_response_headers,
scoped_refptr<net::HttpResponseHeaders>* override_response_headers) {
return ExtensionWebRequestEventRouter::GetInstance()->OnHeadersReceived(
profile_, extension_info_map_.get(), request, callback,
original_response_headers, override_response_headers);
}
void ChromeNetworkDelegate::OnBeforeRedirect(net::URLRequest* request,
const GURL& new_location) {
ExtensionWebRequestEventRouter::GetInstance()->OnBeforeRedirect(
profile_, extension_info_map_.get(), request, new_location);
}
void ChromeNetworkDelegate::OnResponseStarted(net::URLRequest* request) {
ExtensionWebRequestEventRouter::GetInstance()->OnResponseStarted(
profile_, extension_info_map_.get(), request);
ForwardProxyErrors(request, event_router_.get(), profile_);
}
void ChromeNetworkDelegate::OnRawBytesRead(const net::URLRequest& request,
int bytes_read) {
TaskManager::GetInstance()->model()->NotifyBytesRead(request, bytes_read);
}
void ChromeNetworkDelegate::OnCompleted(net::URLRequest* request) {
if (request->status().status() == net::URLRequestStatus::SUCCESS ||
request->status().status() == net::URLRequestStatus::HANDLED_EXTERNALLY) {
bool is_redirect = request->response_headers() &&
net::HttpResponseHeaders::IsRedirectResponseCode(
request->response_headers()->response_code());
if (!is_redirect) {
ExtensionWebRequestEventRouter::GetInstance()->OnCompleted(
profile_, extension_info_map_.get(), request);
}
} else if (request->status().status() == net::URLRequestStatus::FAILED ||
request->status().status() == net::URLRequestStatus::CANCELED) {
ExtensionWebRequestEventRouter::GetInstance()->OnErrorOccurred(
profile_, extension_info_map_.get(), request);
} else {
NOTREACHED();
}
ForwardProxyErrors(request, event_router_.get(), profile_);
}
void ChromeNetworkDelegate::OnURLRequestDestroyed(net::URLRequest* request) {
ExtensionWebRequestEventRouter::GetInstance()->OnURLRequestDestroyed(
profile_, request);
}
void ChromeNetworkDelegate::OnPACScriptError(int line_number,
const string16& error) {
ExtensionProxyEventRouter::GetInstance()->OnPACScriptError(
event_router_.get(), profile_, line_number, error);
}
net::NetworkDelegate::AuthRequiredResponse
ChromeNetworkDelegate::OnAuthRequired(
net::URLRequest* request,
const net::AuthChallengeInfo& auth_info,
const AuthCallback& callback,
net::AuthCredentials* credentials) {
return ExtensionWebRequestEventRouter::GetInstance()->OnAuthRequired(
profile_, extension_info_map_.get(), request, auth_info,
callback, credentials);
}
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