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// Copyright (c) 2011 The Chromium Embedded Framework Authors.
// Portions copyright (c) 2006-2008 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.
//
// This file contains an implementation of the ResourceLoaderBridge class.
// The class is implemented using net::URLRequest, meaning it is a "simple"
// version that directly issues requests. The more complicated one used in the
// browser uses IPC.
//
// Because net::URLRequest only provides an asynchronous resource loading API,
// this file makes use of net::URLRequest from a background IO thread. Requests
// for cookies and synchronously loaded resources result in the main thread of
// the application blocking until the IO thread completes the operation. (See
// GetCookies and SyncLoad)
//
// Main thread IO thread
// ----------- ---------
// ResourceLoaderBridge <---o---------> RequestProxy (normal case)
// \ -> net::URLRequest
// o-------> SyncRequestProxy (synchronous case)
// -> net::URLRequest
//
// NOTE: The implementation in this file may be used to have WebKit fetch
// resources in-process. For example, it is handy for building a single-
// process WebKit embedding (e.g., test_shell) that can use net::URLRequest to
// perform URL loads. See renderer/resource_dispatcher.h for details on an
// alternate implementation that defers fetching to another process.
#include "libcef/browser_resource_loader_bridge.h"
#include "libcef/browser_appcache_system.h"
#include "libcef/browser_request_context.h"
#include "libcef/browser_socket_stream_bridge.h"
#include "libcef/browser_webkit_glue.h"
#include "libcef/browser_impl.h"
#include "libcef/cef_context.h"
#include "libcef/cef_process.h"
#include "libcef/cef_process_io_thread.h"
#include "libcef/external_protocol_handler.h"
#include "libcef/request_impl.h"
#include "libcef/response_impl.h"
#include "libcef/http_header_utils.h"
#include "base/bind.h"
#include "base/file_path.h"
#include "base/file_util.h"
#include "base/memory/ref_counted.h"
#include "base/message_loop.h"
#include "base/message_loop_proxy.h"
#include "base/time.h"
#include "base/timer.h"
#include "base/threading/thread.h"
#include "base/utf_string_conversions.h"
#include "net/base/auth.h"
#include "net/base/file_stream.h"
#include "net/base/io_buffer.h"
#include "net/base/load_flags.h"
#include "net/base/net_errors.h"
#include "net/base/net_util.h"
#include "net/base/static_cookie_policy.h"
#include "net/base/upload_data.h"
#include "net/http/http_cache.h"
#include "net/http/http_request_headers.h"
#include "net/http/http_response_headers.h"
#include "net/proxy/proxy_service.h"
#include "net/url_request/url_request.h"
#include "net/url_request/url_request_job_manager.h"
#include "net/url_request/url_request_redirect_job.h"
#include "webkit/appcache/appcache_interfaces.h"
#include "webkit/blob/blob_storage_controller.h"
#include "webkit/blob/shareable_file_reference.h"
#include "webkit/fileapi/file_system_context.h"
#include "webkit/fileapi/file_system_dir_url_request_job.h"
#include "webkit/fileapi/file_system_url_request_job.h"
#include "webkit/glue/resource_loader_bridge.h"
#include "webkit/glue/webkit_glue.h"
#if defined(OS_MACOSX) || defined(OS_WIN)
#include "crypto/nss_util.h"
#endif
using net::HttpResponseHeaders;
using net::StaticCookiePolicy;
using net::URLRequestStatus;
using webkit_blob::ShareableFileReference;
using webkit_glue::ResourceLoaderBridge;
using webkit_glue::ResourceResponseInfo;
namespace {
static const char kCefUserData[] = "cef_userdata";
struct RequestParams {
std::string method;
GURL url;
GURL first_party_for_cookies;
GURL referrer;
WebKit::WebReferrerPolicy referrer_policy;
std::string headers;
int load_flags;
ResourceType::Type request_type;
int appcache_host_id;
bool download_to_file;
scoped_refptr<net::UploadData> upload;
net::RequestPriority priority;
};
// The interval for calls to RequestProxy::MaybeUpdateUploadProgress
static const int kUpdateUploadProgressIntervalMsec = 100;
class ExtraRequestInfo : public net::URLRequest::Data {
public:
ExtraRequestInfo(CefBrowserImpl* browser, ResourceType::Type resource_type)
: browser_(browser),
resource_type_(resource_type),
allow_download_(resource_type == ResourceType::MAIN_FRAME ||
resource_type == ResourceType::SUB_FRAME) {
}
// The browser pointer is guaranteed to be valid for the lifespan of the
// request. The pointer will be NULL in cases where the request was
// initiated via the CefWebURLRequest API instead of by a browser window.
CefBrowserImpl* browser() const { return browser_; }
// Identifies the type of resource, such as subframe, media, etc.
ResourceType::Type resource_type() const { return resource_type_; }
bool allow_download() const { return allow_download_; }
private:
CefBrowserImpl* browser_;
ResourceType::Type resource_type_;
bool allow_download_;
};
// Used to intercept redirect requests.
class RequestInterceptor : public net::URLRequest::Interceptor {
public:
RequestInterceptor() {
REQUIRE_IOT();
net::URLRequestJobManager::GetInstance()->RegisterRequestInterceptor(this);
}
~RequestInterceptor() {
REQUIRE_IOT();
net::URLRequestJobManager::GetInstance()->
UnregisterRequestInterceptor(this);
}
virtual net::URLRequestJob* MaybeIntercept(net::URLRequest* request)
OVERRIDE {
return NULL;
}
virtual net::URLRequestJob* MaybeInterceptRedirect(net::URLRequest* request,
const GURL& location) OVERRIDE {
REQUIRE_IOT();
ExtraRequestInfo* info =
static_cast<ExtraRequestInfo*>(request->GetUserData(kCefUserData));
if (!info)
return NULL;
CefRefPtr<CefBrowser> browser = info->browser();
if (!browser.get())
return NULL;
CefRefPtr<CefClient> client = browser->GetClient();
CefRefPtr<CefRequestHandler> handler;
if (client.get())
handler = client->GetRequestHandler();
if (!handler.get())
return NULL;
CefString newUrlStr = location.spec();
handler->OnResourceRedirect(browser, request->url().spec(), newUrlStr);
if (newUrlStr != location.spec()) {
GURL new_url = GURL(std::string(newUrlStr));
if (!new_url.is_empty() && new_url.is_valid())
return new net::URLRequestRedirectJob(request, new_url);
}
return NULL;
}
DISALLOW_COPY_AND_ASSIGN(RequestInterceptor);
};
// The RequestProxy does most of its work on the IO thread. The Start and
// Cancel methods are proxied over to the IO thread, where an net::URLRequest
// object is instantiated.
class RequestProxy : public net::URLRequest::Delegate,
public base::RefCountedThreadSafe<RequestProxy> {
public:
// Takes ownership of the params.
explicit RequestProxy(CefRefPtr<CefBrowserImpl> browser)
: download_to_file_(false),
file_stream_(NULL),
buf_(new net::IOBuffer(kDataSize)),
browser_(browser),
owner_loop_(NULL),
peer_(NULL),
last_upload_position_(0),
defers_loading_(false),
defers_loading_want_read_(false) {
}
void DropPeer() {
DCHECK(MessageLoop::current() == owner_loop_);
peer_ = NULL;
}
void Start(ResourceLoaderBridge::Peer* peer, RequestParams* params) {
peer_ = peer;
owner_loop_ = MessageLoop::current();
InitializeParams(params);
// proxy over to the io thread
CefThread::PostTask(CefThread::IO, FROM_HERE, base::Bind(
&RequestProxy::AsyncStart, this, params));
}
void Cancel() {
DCHECK(MessageLoop::current() == owner_loop_);
if (download_handler_.get()) {
// WebKit will try to cancel the download but we won't allow it.
return;
}
// proxy over to the io thread
CefThread::PostTask(CefThread::IO, FROM_HERE, base::Bind(
&RequestProxy::AsyncCancel, this));
}
void SetDefersLoading(bool defer) {
DCHECK(MessageLoop::current() == owner_loop_);
CefThread::PostTask(CefThread::IO, FROM_HERE, base::Bind(
&RequestProxy::AsyncSetDefersLoading, this, defer));
}
protected:
friend class base::RefCountedThreadSafe<RequestProxy>;
virtual ~RequestProxy() {
// If we have a request, then we'd better be on the io thread!
DCHECK(!request_.get() || CefThread::CurrentlyOn(CefThread::IO));
}
virtual void InitializeParams(RequestParams* params) {
params->priority = net::MEDIUM;
}
// --------------------------------------------------------------------------
// The following methods are called on the owner's thread in response to
// various net::URLRequest callbacks. The event hooks, defined below, trigger
// these methods asynchronously.
void NotifyReceivedRedirect(const GURL& new_url,
const ResourceResponseInfo& info) {
DCHECK(MessageLoop::current() == owner_loop_);
bool has_new_first_party_for_cookies = false;
GURL new_first_party_for_cookies;
if (peer_ && peer_->OnReceivedRedirect(new_url, info,
&has_new_first_party_for_cookies,
&new_first_party_for_cookies)) {
CefThread::PostTask(CefThread::IO, FROM_HERE, base::Bind(
&RequestProxy::AsyncFollowDeferredRedirect, this,
has_new_first_party_for_cookies, new_first_party_for_cookies));
} else {
Cancel();
}
}
void NotifyReceivedResponse(const ResourceResponseInfo& info,
const GURL& url, bool allow_download) {
DCHECK(MessageLoop::current() == owner_loop_);
if (browser_.get() && info.headers.get()) {
CefRefPtr<CefClient> client = browser_->GetClient();
CefRefPtr<CefRequestHandler> handler;
if (client.get())
handler = client->GetRequestHandler();
if (handler.get()) {
CefRefPtr<CefResponse> response = new CefResponseImpl();
// Transfer response headers
if (info.headers) {
CefResponse::HeaderMap headerMap;
void* header_index = NULL;
std::string name, value;
while (info.headers->EnumerateHeaderLines(&header_index, &name,
&value)) {
if (!name.empty() && !value.empty())
headerMap.insert(std::make_pair(name, value));
}
response->SetHeaderMap(headerMap);
response->SetStatusText(info.headers->GetStatusText());
response->SetStatus(info.headers->response_code());
}
response->SetMimeType(info.mime_type);
handler->OnResourceResponse(browser_.get(), url.spec(), response,
content_filter_);
std::string content_disposition;
info.headers->GetNormalizedHeader("Content-Disposition",
&content_disposition);
if (allow_download &&
webkit_glue::ShouldDownload(content_disposition, info.mime_type)) {
string16 filename = net::GetSuggestedFilename(url,
content_disposition, info.charset, "", info.mime_type,
"download");
CefRefPtr<CefDownloadHandler> dl_handler;
if (handler->GetDownloadHandler(browser_.get(), info.mime_type,
filename, info.content_length,
dl_handler)) {
download_handler_ = dl_handler;
}
}
}
}
if (peer_)
peer_->OnReceivedResponse(info);
}
void NotifyReceivedData(int bytes_read) {
DCHECK(MessageLoop::current() == owner_loop_);
if (!peer_)
return;
// Make a local copy of buf_, since AsyncReadData reuses it.
scoped_array<char> buf_copy(new char[bytes_read]);
memcpy(buf_copy.get(), buf_->data(), bytes_read);
// Continue reading more data into buf_
// Note: Doing this before notifying our peer ensures our load events get
// dispatched in a manner consistent with DumpRenderTree (and also avoids a
// race condition). If the order of the next 2 functions were reversed, the
// peer could generate new requests in response to the received data, which
// when run on the io thread, could race against this function in doing
// another InvokeLater. See bug 769249.
CefThread::PostTask(CefThread::IO, FROM_HERE, base::Bind(
&RequestProxy::AsyncReadData, this));
CefRefPtr<CefStreamReader> resourceStream;
if (content_filter_.get())
content_filter_->ProcessData(buf_copy.get(), bytes_read, resourceStream);
if (resourceStream.get()) {
// The filter made some changes to the data in the buffer.
resourceStream->Seek(0, SEEK_END);
bytes_read = resourceStream->Tell();
resourceStream->Seek(0, SEEK_SET);
buf_copy.reset(new char[bytes_read]);
resourceStream->Read(buf_copy.get(), 1, bytes_read);
}
if (download_handler_.get() &&
!download_handler_->ReceivedData(buf_copy.get(), bytes_read)) {
// Cancel loading by proxying over to the io thread.
CefThread::PostTask(CefThread::IO, FROM_HERE, base::Bind(
&RequestProxy::AsyncCancel, this));
}
peer_->OnReceivedData(buf_copy.get(), bytes_read, -1);
}
void NotifyDownloadedData(int bytes_read) {
DCHECK(MessageLoop::current() == owner_loop_);
if (!peer_)
return;
// Continue reading more data, see the comment in NotifyReceivedData.
CefThread::PostTask(CefThread::IO, FROM_HERE, base::Bind(
&RequestProxy::AsyncReadData, this));
peer_->OnDownloadedData(bytes_read);
}
void NotifyCompletedRequest(const net::URLRequestStatus& status,
const std::string& security_info,
const base::TimeTicks& complete_time) {
DCHECK(MessageLoop::current() == owner_loop_);
// Drain the content filter of all remaining data
if (content_filter_.get()) {
CefRefPtr<CefStreamReader> remainder;
content_filter_->Drain(remainder);
if (remainder.get()) {
remainder->Seek(0, SEEK_END);
int size = static_cast<int>(remainder->Tell());
if (size > 0) {
remainder->Seek(0, SEEK_SET);
scoped_array<char> buf(new char[size]);
remainder->Read(buf.get(), 1, size);
if (download_handler_.get() &&
!download_handler_->ReceivedData(buf.get(), size)) {
// Cancel loading by proxying over to the io thread.
CefThread::PostTask(CefThread::IO, FROM_HERE, base::Bind(
&RequestProxy::AsyncCancel, this));
}
if (peer_)
peer_->OnReceivedData(buf.get(), size, -1);
}
}
content_filter_ = NULL;
}
if (download_handler_.get()) {
download_handler_->Complete();
download_handler_ = NULL;
}
if (peer_) {
peer_->OnCompletedRequest(status, security_info, complete_time);
DropPeer(); // ensure no further notifications
}
}
void NotifyUploadProgress(uint64 position, uint64 size) {
DCHECK(MessageLoop::current() == owner_loop_);
if (peer_)
peer_->OnUploadProgress(position, size);
}
// --------------------------------------------------------------------------
// The following methods are called on the io thread. They correspond to
// actions performed on the owner's thread.
void AsyncStart(RequestParams* params) {
DCHECK(CefThread::CurrentlyOn(CefThread::IO));
bool handled = false;
if (browser_.get()) {
CefRefPtr<CefClient> client = browser_->GetClient();
CefRefPtr<CefRequestHandler> handler;
if (client.get())
handler = client->GetRequestHandler();
if (handler.get()) {
// Build the request object for passing to the handler
CefRefPtr<CefRequest> request(new CefRequestImpl());
CefRequestImpl* requestimpl =
static_cast<CefRequestImpl*>(request.get());
std::string originalUrl(params->url.spec());
requestimpl->SetURL(originalUrl);
requestimpl->SetMethod(params->method);
// Transfer request headers
CefRequest::HeaderMap headerMap;
HttpHeaderUtils::ParseHeaders(params->headers, headerMap);
headerMap.insert(std::make_pair("Referer", params->referrer.spec()));
requestimpl->SetHeaderMap(headerMap);
// Transfer post data, if any
scoped_refptr<net::UploadData> upload = params->upload;
if (upload.get()) {
CefRefPtr<CefPostData> postdata(new CefPostDataImpl());
static_cast<CefPostDataImpl*>(postdata.get())->Set(*upload.get());
requestimpl->SetPostData(postdata);
}
int loadFlags = params->load_flags;
// Handler output will be returned in these variables
CefString redirectUrl;
CefRefPtr<CefStreamReader> resourceStream;
CefRefPtr<CefResponse> response(new CefResponseImpl());
handled = handler->OnBeforeResourceLoad(browser_.get(), request,
redirectUrl, resourceStream, response, loadFlags);
if (!handled) {
// Observe URL from request.
const std::string requestUrl(request->GetURL());
if (requestUrl != originalUrl)
params->url = GURL(requestUrl);
else if (!redirectUrl.empty())
params->url = GURL(std::string(redirectUrl));
// Observe method from request.
params->method = request->GetMethod();
// Observe headers from request.
request->GetHeaderMap(headerMap);
CefString referrerStr;
referrerStr.FromASCII("Referer");
CefRequest::HeaderMap::iterator referrer =
headerMap.find(referrerStr);
if (referrer == headerMap.end()) {
params->referrer = GURL();
} else {
params->referrer = GURL(std::string(referrer->second));
headerMap.erase(referrer);
}
params->headers = HttpHeaderUtils::GenerateHeaders(headerMap);
// Observe post data from request.
CefRefPtr<CefPostData> postData = request->GetPostData();
if (postData.get()) {
params->upload = new net::UploadData();
static_cast<CefPostDataImpl*>(postData.get())->Get(*params->upload);
}
}
if (handled) {
// cancel the resource load
OnCompletedRequest(
URLRequestStatus(URLRequestStatus::CANCELED, net::ERR_ABORTED),
std::string(), base::TimeTicks());
} else if (resourceStream.get()) {
// load from the provided resource stream
handled = true;
resourceStream->Seek(0, SEEK_END);
int64 offset = resourceStream->Tell();
resourceStream->Seek(0, SEEK_SET);
resource_stream_ = resourceStream;
CefResponseImpl* responseImpl =
static_cast<CefResponseImpl*>(response.get());
ResourceResponseInfo info;
info.content_length = offset;
info.mime_type = response->GetMimeType();
info.headers = responseImpl->GetResponseHeaders();
OnReceivedResponse(info, params->url);
AsyncReadData();
} else if (response->GetStatus() != 0) {
// status set, but no resource stream
handled = true;
CefResponseImpl* responseImpl =
static_cast<CefResponseImpl*>(response.get());
ResourceResponseInfo info;
info.content_length = 0;
info.mime_type = response->GetMimeType();
info.headers = responseImpl->GetResponseHeaders();
OnReceivedResponse(info, params->url);
AsyncReadData();
}
if (!handled && ResourceType::IsFrame(params->request_type) &&
!net::URLRequest::IsHandledProtocol(params->url.scheme())) {
bool allow_os_execution = false;
handled = handler->OnProtocolExecution(browser_.get(),
params->url.spec(), allow_os_execution);
if (!handled && allow_os_execution &&
ExternalProtocolHandler::HandleExternalProtocol(params->url)) {
handled = true;
}
if (handled) {
OnCompletedRequest(
URLRequestStatus(URLRequestStatus::HANDLED_EXTERNALLY, net::OK),
std::string(), base::TimeTicks());
}
}
}
}
if (!handled) {
// Might need to resolve the blob references in the upload data.
if (params->upload) {
_Context->request_context()->blob_storage_controller()->
ResolveBlobReferencesInUploadData(params->upload.get());
}
request_.reset(new net::URLRequest(params->url, this));
request_->set_priority(params->priority);
request_->set_method(params->method);
request_->set_first_party_for_cookies(params->first_party_for_cookies);
request_->set_referrer(params->referrer.spec());
webkit_glue::ConfigureURLRequestForReferrerPolicy(
request_.get(), params->referrer_policy);
net::HttpRequestHeaders headers;
headers.AddHeadersFromString(params->headers);
request_->SetExtraRequestHeaders(headers);
request_->set_load_flags(params->load_flags);
request_->set_upload(params->upload.get());
request_->set_context(browser_.get() ? browser_->request_context_proxy() :
_Context->request_context());
request_->SetUserData(kCefUserData,
new ExtraRequestInfo(browser_.get(), params->request_type));
BrowserAppCacheSystem::SetExtraRequestInfo(
request_.get(), params->appcache_host_id, params->request_type);
download_to_file_ = params->download_to_file;
if (download_to_file_) {
FilePath path;
if (file_util::CreateTemporaryFile(&path)) {
downloaded_file_ = ShareableFileReference::GetOrCreate(
path, ShareableFileReference::DELETE_ON_FINAL_RELEASE,
base::MessageLoopProxy::current());
file_stream_.OpenSync(
path, base::PLATFORM_FILE_OPEN | base::PLATFORM_FILE_WRITE);
}
}
request_->Start();
if (request_.get() && request_->has_upload() &&
params->load_flags & net::LOAD_ENABLE_UPLOAD_PROGRESS) {
upload_progress_timer_.Start(FROM_HERE,
base::TimeDelta::FromMilliseconds(
kUpdateUploadProgressIntervalMsec),
this, &RequestProxy::MaybeUpdateUploadProgress);
}
}
delete params;
}
void AsyncCancel() {
DCHECK(CefThread::CurrentlyOn(CefThread::IO));
// This can be null in cases where the request is already done.
if (!resource_stream_.get() && !request_.get())
return;
if (request_.get())
request_->Cancel();
Done();
}
void AsyncFollowDeferredRedirect(bool has_new_first_party_for_cookies,
const GURL& new_first_party_for_cookies) {
DCHECK(CefThread::CurrentlyOn(CefThread::IO));
// This can be null in cases where the request is already done.
if (!request_.get())
return;
if (has_new_first_party_for_cookies)
request_->set_first_party_for_cookies(new_first_party_for_cookies);
request_->FollowDeferredRedirect();
}
void AsyncSetDefersLoading(bool defer) {
DCHECK(CefThread::CurrentlyOn(CefThread::IO));
if (defers_loading_ != defer) {
defers_loading_ = defer;
if (!defers_loading_ && defers_loading_want_read_) {
// Perform the pending AsyncReadData now.
defers_loading_want_read_ = false;
AsyncReadData();
}
}
}
void AsyncReadData() {
DCHECK(CefThread::CurrentlyOn(CefThread::IO));
// Pause downloading if we're in deferred mode.
if (defers_loading_) {
defers_loading_want_read_ = true;
return;
}
if (resource_stream_.get()) {
// Read from the handler-provided resource stream
int bytes_read = resource_stream_->Read(buf_->data(), 1, kDataSize);
if (bytes_read > 0) {
OnReceivedData(bytes_read);
} else {
Done();
}
return;
}
// This can be null in cases where the request is already done.
if (!request_.get())
return;
if (request_->status().is_success()) {
int bytes_read;
if (request_->Read(buf_, kDataSize, &bytes_read) && bytes_read) {
OnReceivedData(bytes_read);
} else if (!request_->status().is_io_pending()) {
Done();
} // else wait for OnReadCompleted
} else {
Done();
}
}
// --------------------------------------------------------------------------
// The following methods are event hooks (corresponding to net::URLRequest
// callbacks) that run on the IO thread. They are designed to be overridden
// by the SyncRequestProxy subclass.
virtual void OnReceivedRedirect(
const GURL& new_url,
const ResourceResponseInfo& info,
bool* defer_redirect) {
DCHECK(CefThread::CurrentlyOn(CefThread::IO));
*defer_redirect = true; // See AsyncFollowDeferredRedirect
owner_loop_->PostTask(FROM_HERE, base::Bind(
&RequestProxy::NotifyReceivedRedirect, this, new_url, info));
}
virtual void OnReceivedResponse(
const ResourceResponseInfo& info,
// only used when loading from a resource stream
const GURL& simulated_url) {
DCHECK(CefThread::CurrentlyOn(CefThread::IO));
GURL url;
bool allow_download(false);
if (request_.get()) {
url = request_->url();
ExtraRequestInfo* info =
static_cast<ExtraRequestInfo*>(request_->GetUserData(kCefUserData));
if (info)
allow_download = info->allow_download();
} else if (!simulated_url.is_empty() && simulated_url.is_valid()) {
url = simulated_url;
}
owner_loop_->PostTask(FROM_HERE, base::Bind(
&RequestProxy::NotifyReceivedResponse, this, info, url,
allow_download));
}
virtual void OnReceivedData(int bytes_read) {
DCHECK(CefThread::CurrentlyOn(CefThread::IO));
if (download_to_file_) {
file_stream_.WriteSync(buf_->data(), bytes_read);
owner_loop_->PostTask(FROM_HERE, base::Bind(
&RequestProxy::NotifyDownloadedData, this, bytes_read));
return;
}
owner_loop_->PostTask(FROM_HERE, base::Bind(
&RequestProxy::NotifyReceivedData, this, bytes_read));
}
virtual void OnCompletedRequest(const net::URLRequestStatus& status,
const std::string& security_info,
const base::TimeTicks& complete_time) {
DCHECK(CefThread::CurrentlyOn(CefThread::IO));
if (download_to_file_)
file_stream_.CloseSync();
owner_loop_->PostTask(FROM_HERE, base::Bind(
&RequestProxy::NotifyCompletedRequest, this, status, security_info,
complete_time));
}
// --------------------------------------------------------------------------
// net::URLRequest::Delegate implementation:
virtual void OnReceivedRedirect(net::URLRequest* request,
const GURL& new_url,
bool* defer_redirect) OVERRIDE {
DCHECK(CefThread::CurrentlyOn(CefThread::IO));
DCHECK(request->status().is_success());
ResourceResponseInfo info;
PopulateResponseInfo(request, &info);
OnReceivedRedirect(new_url, info, defer_redirect);
}
virtual void OnResponseStarted(net::URLRequest* request) OVERRIDE {
DCHECK(CefThread::CurrentlyOn(CefThread::IO));
if (request->status().is_success()) {
ResourceResponseInfo info;
PopulateResponseInfo(request, &info);
OnReceivedResponse(info, GURL::EmptyGURL());
AsyncReadData(); // start reading
} else {
Done();
}
}
virtual void OnAuthRequired(net::URLRequest* request,
net::AuthChallengeInfo* auth_info) OVERRIDE {
DCHECK(CefThread::CurrentlyOn(CefThread::IO));
if (browser_.get()) {
CefRefPtr<CefClient> client = browser_->GetClient();
if (client.get()) {
CefRefPtr<CefRequestHandler> handler = client->GetRequestHandler();
if (handler.get()) {
CefString username, password;
if (handler->GetAuthCredentials(browser_.get(),
auth_info->is_proxy,
auth_info->challenger.host(),
auth_info->challenger.port(),
auth_info->realm,
auth_info->scheme,
username, password)) {
request->SetAuth(net::AuthCredentials(username, password));
return;
}
}
}
}
request->CancelAuth();
}
virtual void OnSSLCertificateError(net::URLRequest* request,
const net::SSLInfo& ssl_info,
bool fatal) OVERRIDE {
DCHECK(CefThread::CurrentlyOn(CefThread::IO));
// Allow all certificate errors.
request->ContinueDespiteLastError();
}
virtual void OnReadCompleted(net::URLRequest* request,
int bytes_read) OVERRIDE {
DCHECK(CefThread::CurrentlyOn(CefThread::IO));
if (request->status().is_success() && bytes_read > 0) {
OnReceivedData(bytes_read);
} else {
Done();
}
}
// --------------------------------------------------------------------------
// Helpers and data:
void Done() {
DCHECK(CefThread::CurrentlyOn(CefThread::IO));
if (resource_stream_.get()) {
// Resource stream reads always complete successfully
OnCompletedRequest(URLRequestStatus(URLRequestStatus::SUCCESS, 0),
std::string(), base::TimeTicks());
resource_stream_ = NULL;
} else if (request_.get()) {
if (upload_progress_timer_.IsRunning()) {
MaybeUpdateUploadProgress();
upload_progress_timer_.Stop();
}
DCHECK(request_.get());
OnCompletedRequest(request_->status(), std::string(), base::TimeTicks());
request_.reset(); // destroy on the io thread
}
}
void MaybeUpdateUploadProgress() {
DCHECK(CefThread::CurrentlyOn(CefThread::IO));
// If a redirect is received upload is cancelled in net::URLRequest, we
// should try to stop the |upload_progress_timer_| timer and return.
if (!request_->has_upload()) {
if (upload_progress_timer_.IsRunning())
upload_progress_timer_.Stop();
return;
}
// GetContentLengthSync() may perform file IO, but it's ok here, as file
// IO is not prohibited in IOThread defined in the file.
uint64 size = request_->get_upload()->GetContentLengthSync();
uint64 position = request_->GetUploadProgress();
if (position == last_upload_position_)
return; // no progress made since last time
const uint64 kHalfPercentIncrements = 200;
const base::TimeDelta kOneSecond = base::TimeDelta::FromMilliseconds(1000);
uint64 amt_since_last = position - last_upload_position_;
base::TimeDelta time_since_last = base::TimeTicks::Now() -
last_upload_ticks_;
bool is_finished = (size == position);
bool enough_new_progress = (amt_since_last > (size /
kHalfPercentIncrements));
bool too_much_time_passed = time_since_last > kOneSecond;
if (is_finished || enough_new_progress || too_much_time_passed) {
owner_loop_->PostTask(FROM_HERE, base::Bind(
&RequestProxy::NotifyUploadProgress, this, position, size));
last_upload_ticks_ = base::TimeTicks::Now();
last_upload_position_ = position;
}
}
void PopulateResponseInfo(net::URLRequest* request,
ResourceResponseInfo* info) const {
DCHECK(CefThread::CurrentlyOn(CefThread::IO));
info->request_time = request->request_time();
info->response_time = request->response_time();
info->headers = request->response_headers();
request->GetMimeType(&info->mime_type);
request->GetCharset(&info->charset);
info->content_length = request->GetExpectedContentSize();
if (downloaded_file_)
info->download_file_path = downloaded_file_->path();
BrowserAppCacheSystem::GetExtraResponseInfo(
request,
&info->appcache_id,
&info->appcache_manifest_url);
}
scoped_ptr<net::URLRequest> request_;
CefRefPtr<CefStreamReader> resource_stream_;
// Support for request.download_to_file behavior.
bool download_to_file_;
net::FileStream file_stream_;
scoped_refptr<ShareableFileReference> downloaded_file_;
// Size of our async IO data buffers. Limited by the sanity check in
// URLRequestJob::Read().
static const int kDataSize = 1000000-1;
// read buffer for async IO
scoped_refptr<net::IOBuffer> buf_;
CefRefPtr<CefBrowserImpl> browser_;
MessageLoop* owner_loop_;
// This is our peer in WebKit (implemented as ResourceHandleInternal). We do
// not manage its lifetime, and we may only access it from the owner's
// message loop (owner_loop_).
ResourceLoaderBridge::Peer* peer_;
// Timer used to pull upload progress info.
base::RepeatingTimer<RequestProxy> upload_progress_timer_;
// Info used to determine whether or not to send an upload progress update.
uint64 last_upload_position_;
base::TimeTicks last_upload_ticks_;
CefRefPtr<CefDownloadHandler> download_handler_;
CefRefPtr<CefContentFilter> content_filter_;
// True if loading of data is currently deferred.
bool defers_loading_;
// True if an AsyncReadData was scheduled while we were deferred.
bool defers_loading_want_read_;
};
//-----------------------------------------------------------------------------
class SyncRequestProxy : public RequestProxy {
public:
explicit SyncRequestProxy(CefRefPtr<CefBrowserImpl> browser,
ResourceLoaderBridge::SyncLoadResponse* result)
: RequestProxy(browser), result_(result), event_(true, false) {
}
void WaitForCompletion() {
event_.Wait();
}
// --------------------------------------------------------------------------
// Event hooks that run on the IO thread:
virtual void OnReceivedRedirect(
const GURL& new_url,
const ResourceResponseInfo& info,
bool* defer_redirect) {
DCHECK(CefThread::CurrentlyOn(CefThread::IO));
// TODO(darin): It would be much better if this could live in WebCore, but
// doing so requires API changes at all levels. Similar code exists in
// WebCore/platform/network/cf/ResourceHandleCFNet.cpp :-(
if (new_url.GetOrigin() != result_->url.GetOrigin()) {
DLOG(WARNING) << "Cross origin redirect denied";
Cancel();
return;
}
result_->url = new_url;
}
virtual void OnReceivedResponse(const ResourceResponseInfo& info,
const GURL&) {
DCHECK(CefThread::CurrentlyOn(CefThread::IO));
*static_cast<ResourceResponseInfo*>(result_) = info;
}
virtual void OnReceivedData(int bytes_read) {
DCHECK(CefThread::CurrentlyOn(CefThread::IO));
if (download_to_file_)
file_stream_.WriteSync(buf_->data(), bytes_read);
else
result_->data.append(buf_->data(), bytes_read);
AsyncReadData(); // read more (may recurse)
}
virtual void OnCompletedRequest(const net::URLRequestStatus& status,
const std::string& security_info,
const base::TimeTicks& complete_time) {
DCHECK(CefThread::CurrentlyOn(CefThread::IO));
if (download_to_file_)
file_stream_.CloseSync();
result_->status = status;
event_.Signal();
}
protected:
virtual void InitializeParams(RequestParams* params) {
// For synchronous requests ignore load limits to avoid a deadlock problem
// in SyncRequestProxy (issue #192).
params->load_flags |= net::LOAD_IGNORE_LIMITS;
params->priority = net::HIGHEST;
}
private:
ResourceLoaderBridge::SyncLoadResponse* result_;
base::WaitableEvent event_;
};
//-----------------------------------------------------------------------------
class ResourceLoaderBridgeImpl : public ResourceLoaderBridge,
public base::NonThreadSafe {
public:
ResourceLoaderBridgeImpl(CefRefPtr<CefBrowserImpl> browser,
const webkit_glue::ResourceLoaderBridge::RequestInfo& request_info)
: browser_(browser),
params_(new RequestParams),
proxy_(NULL) {
params_->method = request_info.method;
params_->url = request_info.url;
params_->first_party_for_cookies = request_info.first_party_for_cookies;
params_->referrer = request_info.referrer;
params_->referrer_policy = request_info.referrer_policy;
params_->headers = request_info.headers;
params_->load_flags = request_info.load_flags;
params_->request_type = request_info.request_type;
params_->appcache_host_id = request_info.appcache_host_id;
params_->download_to_file = request_info.download_to_file;
}
virtual ~ResourceLoaderBridgeImpl() {
if (proxy_) {
proxy_->DropPeer();
// Let the proxy die on the IO thread
CefThread::ReleaseSoon(CefThread::IO, FROM_HERE, proxy_.release());
}
}
// --------------------------------------------------------------------------
// ResourceLoaderBridge implementation:
virtual void AppendDataToUpload(const char* data, int data_len) OVERRIDE {
DCHECK(CalledOnValidThread());
DCHECK(params_.get());
if (!params_->upload)
params_->upload = new net::UploadData();
params_->upload->AppendBytes(data, data_len);
}
virtual void AppendFileRangeToUpload(
const FilePath& file_path,
uint64 offset,
uint64 length,
const base::Time& expected_modification_time) OVERRIDE {
DCHECK(CalledOnValidThread());
DCHECK(params_.get());
if (!params_->upload)
params_->upload = new net::UploadData();
params_->upload->AppendFileRange(file_path, offset, length,
expected_modification_time);
}
virtual void AppendBlobToUpload(const GURL& blob_url) OVERRIDE {
DCHECK(CalledOnValidThread());
DCHECK(params_.get());
if (!params_->upload)
params_->upload = new net::UploadData();
params_->upload->AppendBlob(blob_url);
}
virtual void SetUploadIdentifier(int64 identifier) OVERRIDE {
DCHECK(CalledOnValidThread());
DCHECK(params_.get());
if (!params_->upload)
params_->upload = new net::UploadData();
params_->upload->set_identifier(identifier);
}
virtual bool Start(Peer* peer) OVERRIDE {
DCHECK(CalledOnValidThread());
DCHECK(!proxy_);
proxy_ = new RequestProxy(browser_);
proxy_->Start(peer, params_.release());
return true; // Any errors will be reported asynchronously.
}
virtual void Cancel() OVERRIDE {
DCHECK(CalledOnValidThread());
DCHECK(proxy_);
proxy_->Cancel();
}
virtual void SetDefersLoading(bool value) OVERRIDE {
DCHECK(CalledOnValidThread());
DCHECK(proxy_);
proxy_->SetDefersLoading(value);
}
virtual void SyncLoad(SyncLoadResponse* response) OVERRIDE {
DCHECK(CalledOnValidThread());
DCHECK(!proxy_);
// this may change as the result of a redirect
response->url = params_->url;
proxy_ = new SyncRequestProxy(browser_, response);
proxy_->Start(NULL, params_.release());
static_cast<SyncRequestProxy*>(proxy_.get())->WaitForCompletion();
}
virtual void UpdateRoutingId(int new_routing_id) OVERRIDE {}
private:
CefRefPtr<CefBrowserImpl> browser_;
// Ownership of params_ is transfered to the proxy when the proxy is created.
scoped_ptr<RequestParams> params_;
// The request proxy is allocated when we start the request, and then it
// sticks around until this ResourceLoaderBridge is destroyed.
scoped_refptr<RequestProxy> proxy_;
};
} // anonymous namespace
//-----------------------------------------------------------------------------
// static
webkit_glue::ResourceLoaderBridge* BrowserResourceLoaderBridge::Create(
const webkit_glue::ResourceLoaderBridge::RequestInfo& request_info) {
DCHECK(CefThread::CurrentlyOn(CefThread::UI));
CefRefPtr<CefBrowserImpl> browser =
_Context->GetBrowserByID(request_info.routing_id);
return new ResourceLoaderBridgeImpl(browser.get(), request_info);
}
//-----------------------------------------------------------------------------
// static
CefRefPtr<CefBrowserImpl> BrowserResourceLoaderBridge::GetBrowserForRequest(
net::URLRequest* request) {
REQUIRE_IOT();
ExtraRequestInfo* extra_info =
static_cast<ExtraRequestInfo*>(request->GetUserData(kCefUserData));
if (extra_info)
return extra_info->browser();
return NULL;
}
// static
scoped_refptr<base::MessageLoopProxy>
BrowserResourceLoaderBridge::GetCacheThread() {
return CefThread::GetMessageLoopProxyForThread(CefThread::FILE);
}
// static
net::URLRequest::Interceptor*
BrowserResourceLoaderBridge::CreateRequestInterceptor() {
return new RequestInterceptor();
}
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