| // Copyright (c) 2012 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 "net/url_request/url_fetcher_core.h" |
| |
| #include "base/bind.h" |
| #include "base/logging.h" |
| #include "base/metrics/histogram.h" |
| #include "base/sequenced_task_runner.h" |
| #include "base/single_thread_task_runner.h" |
| #include "base/stl_util.h" |
| #include "base/thread_task_runner_handle.h" |
| #include "base/tracked_objects.h" |
| #include "net/base/io_buffer.h" |
| #include "net/base/load_flags.h" |
| #include "net/base/net_errors.h" |
| #include "net/base/request_priority.h" |
| #include "net/base/upload_bytes_element_reader.h" |
| #include "net/base/upload_data_stream.h" |
| #include "net/base/upload_file_element_reader.h" |
| #include "net/http/http_response_headers.h" |
| #include "net/url_request/url_fetcher_delegate.h" |
| #include "net/url_request/url_fetcher_response_writer.h" |
| #include "net/url_request/url_request_context.h" |
| #include "net/url_request/url_request_context_getter.h" |
| #include "net/url_request/url_request_throttler_manager.h" |
| |
| namespace { |
| |
| const int kBufferSize = 4096; |
| const int kUploadProgressTimerInterval = 100; |
| bool g_interception_enabled = false; |
| bool g_ignore_certificate_requests = false; |
| |
| void EmptyCompletionCallback(int result) {} |
| |
| } // namespace |
| |
| namespace net { |
| |
| // URLFetcherCore::Registry --------------------------------------------------- |
| |
| URLFetcherCore::Registry::Registry() {} |
| URLFetcherCore::Registry::~Registry() {} |
| |
| void URLFetcherCore::Registry::AddURLFetcherCore(URLFetcherCore* core) { |
| DCHECK(!ContainsKey(fetchers_, core)); |
| fetchers_.insert(core); |
| } |
| |
| void URLFetcherCore::Registry::RemoveURLFetcherCore(URLFetcherCore* core) { |
| DCHECK(ContainsKey(fetchers_, core)); |
| fetchers_.erase(core); |
| } |
| |
| void URLFetcherCore::Registry::CancelAll() { |
| while (!fetchers_.empty()) |
| (*fetchers_.begin())->CancelURLRequest(ERR_ABORTED); |
| } |
| |
| // URLFetcherCore ------------------------------------------------------------- |
| |
| // static |
| base::LazyInstance<URLFetcherCore::Registry> |
| URLFetcherCore::g_registry = LAZY_INSTANCE_INITIALIZER; |
| |
| URLFetcherCore::URLFetcherCore(URLFetcher* fetcher, |
| const GURL& original_url, |
| URLFetcher::RequestType request_type, |
| URLFetcherDelegate* d) |
| : fetcher_(fetcher), |
| original_url_(original_url), |
| request_type_(request_type), |
| delegate_(d), |
| delegate_task_runner_(base::ThreadTaskRunnerHandle::Get()), |
| load_flags_(LOAD_NORMAL), |
| response_code_(URLFetcher::RESPONSE_CODE_INVALID), |
| buffer_(new IOBuffer(kBufferSize)), |
| url_request_data_key_(NULL), |
| was_fetched_via_proxy_(false), |
| upload_content_set_(false), |
| upload_range_offset_(0), |
| upload_range_length_(0), |
| is_chunked_upload_(false), |
| was_cancelled_(false), |
| stop_on_redirect_(false), |
| stopped_on_redirect_(false), |
| automatically_retry_on_5xx_(true), |
| num_retries_on_5xx_(0), |
| max_retries_on_5xx_(0), |
| num_retries_on_network_changes_(0), |
| max_retries_on_network_changes_(0), |
| current_upload_bytes_(-1), |
| current_response_bytes_(0), |
| total_response_bytes_(-1) { |
| CHECK(original_url_.is_valid()); |
| } |
| |
| void URLFetcherCore::Start() { |
| DCHECK(delegate_task_runner_.get()); |
| DCHECK(request_context_getter_.get()) << "We need an URLRequestContext!"; |
| if (network_task_runner_.get()) { |
| DCHECK_EQ(network_task_runner_, |
| request_context_getter_->GetNetworkTaskRunner()); |
| } else { |
| network_task_runner_ = request_context_getter_->GetNetworkTaskRunner(); |
| } |
| DCHECK(network_task_runner_.get()) << "We need an IO task runner"; |
| |
| network_task_runner_->PostTask( |
| FROM_HERE, base::Bind(&URLFetcherCore::StartOnIOThread, this)); |
| } |
| |
| void URLFetcherCore::Stop() { |
| if (delegate_task_runner_.get()) // May be NULL in tests. |
| DCHECK(delegate_task_runner_->BelongsToCurrentThread()); |
| |
| delegate_ = NULL; |
| fetcher_ = NULL; |
| if (!network_task_runner_.get()) |
| return; |
| if (network_task_runner_->RunsTasksOnCurrentThread()) { |
| CancelURLRequest(ERR_ABORTED); |
| } else { |
| network_task_runner_->PostTask( |
| FROM_HERE, |
| base::Bind(&URLFetcherCore::CancelURLRequest, this, ERR_ABORTED)); |
| } |
| } |
| |
| void URLFetcherCore::SetUploadData(const std::string& upload_content_type, |
| const std::string& upload_content) { |
| DCHECK(!is_chunked_upload_); |
| DCHECK(!upload_content_set_); |
| DCHECK(upload_content_.empty()); |
| DCHECK(upload_file_path_.empty()); |
| DCHECK(upload_content_type_.empty()); |
| |
| // Empty |upload_content_type| is allowed iff the |upload_content| is empty. |
| DCHECK(upload_content.empty() || !upload_content_type.empty()); |
| |
| upload_content_type_ = upload_content_type; |
| upload_content_ = upload_content; |
| upload_content_set_ = true; |
| } |
| |
| void URLFetcherCore::SetUploadFilePath( |
| const std::string& upload_content_type, |
| const base::FilePath& file_path, |
| uint64 range_offset, |
| uint64 range_length, |
| scoped_refptr<base::TaskRunner> file_task_runner) { |
| DCHECK(!is_chunked_upload_); |
| DCHECK(!upload_content_set_); |
| DCHECK(upload_content_.empty()); |
| DCHECK(upload_file_path_.empty()); |
| DCHECK_EQ(upload_range_offset_, 0ULL); |
| DCHECK_EQ(upload_range_length_, 0ULL); |
| DCHECK(upload_content_type_.empty()); |
| DCHECK(!upload_content_type.empty()); |
| |
| upload_content_type_ = upload_content_type; |
| upload_file_path_ = file_path; |
| upload_range_offset_ = range_offset; |
| upload_range_length_ = range_length; |
| upload_file_task_runner_ = file_task_runner; |
| upload_content_set_ = true; |
| } |
| |
| void URLFetcherCore::SetChunkedUpload(const std::string& content_type) { |
| DCHECK(is_chunked_upload_ || |
| (upload_content_type_.empty() && |
| upload_content_.empty())); |
| |
| // Empty |content_type| is not allowed here, because it is impossible |
| // to ensure non-empty upload content as it is not yet supplied. |
| DCHECK(!content_type.empty()); |
| |
| upload_content_type_ = content_type; |
| upload_content_.clear(); |
| is_chunked_upload_ = true; |
| } |
| |
| void URLFetcherCore::AppendChunkToUpload(const std::string& content, |
| bool is_last_chunk) { |
| DCHECK(delegate_task_runner_.get()); |
| DCHECK(network_task_runner_.get()); |
| network_task_runner_->PostTask( |
| FROM_HERE, |
| base::Bind(&URLFetcherCore::CompleteAddingUploadDataChunk, this, content, |
| is_last_chunk)); |
| } |
| |
| void URLFetcherCore::SetLoadFlags(int load_flags) { |
| load_flags_ = load_flags; |
| } |
| |
| int URLFetcherCore::GetLoadFlags() const { |
| return load_flags_; |
| } |
| |
| void URLFetcherCore::SetReferrer(const std::string& referrer) { |
| referrer_ = referrer; |
| } |
| |
| void URLFetcherCore::SetExtraRequestHeaders( |
| const std::string& extra_request_headers) { |
| extra_request_headers_.Clear(); |
| extra_request_headers_.AddHeadersFromString(extra_request_headers); |
| } |
| |
| void URLFetcherCore::AddExtraRequestHeader(const std::string& header_line) { |
| extra_request_headers_.AddHeaderFromString(header_line); |
| } |
| |
| void URLFetcherCore::GetExtraRequestHeaders( |
| HttpRequestHeaders* headers) const { |
| headers->CopyFrom(extra_request_headers_); |
| } |
| |
| void URLFetcherCore::SetRequestContext( |
| URLRequestContextGetter* request_context_getter) { |
| DCHECK(!request_context_getter_.get()); |
| DCHECK(request_context_getter); |
| request_context_getter_ = request_context_getter; |
| } |
| |
| void URLFetcherCore::SetFirstPartyForCookies( |
| const GURL& first_party_for_cookies) { |
| DCHECK(first_party_for_cookies_.is_empty()); |
| first_party_for_cookies_ = first_party_for_cookies; |
| } |
| |
| void URLFetcherCore::SetURLRequestUserData( |
| const void* key, |
| const URLFetcher::CreateDataCallback& create_data_callback) { |
| DCHECK(key); |
| DCHECK(!create_data_callback.is_null()); |
| url_request_data_key_ = key; |
| url_request_create_data_callback_ = create_data_callback; |
| } |
| |
| void URLFetcherCore::SetStopOnRedirect(bool stop_on_redirect) { |
| stop_on_redirect_ = stop_on_redirect; |
| } |
| |
| void URLFetcherCore::SetAutomaticallyRetryOn5xx(bool retry) { |
| automatically_retry_on_5xx_ = retry; |
| } |
| |
| void URLFetcherCore::SetMaxRetriesOn5xx(int max_retries) { |
| max_retries_on_5xx_ = max_retries; |
| } |
| |
| int URLFetcherCore::GetMaxRetriesOn5xx() const { |
| return max_retries_on_5xx_; |
| } |
| |
| base::TimeDelta URLFetcherCore::GetBackoffDelay() const { |
| return backoff_delay_; |
| } |
| |
| void URLFetcherCore::SetAutomaticallyRetryOnNetworkChanges(int max_retries) { |
| max_retries_on_network_changes_ = max_retries; |
| } |
| |
| void URLFetcherCore::SaveResponseToFileAtPath( |
| const base::FilePath& file_path, |
| scoped_refptr<base::SequencedTaskRunner> file_task_runner) { |
| DCHECK(delegate_task_runner_->BelongsToCurrentThread()); |
| SaveResponseWithWriter(scoped_ptr<URLFetcherResponseWriter>( |
| new URLFetcherFileWriter(file_task_runner, file_path))); |
| } |
| |
| void URLFetcherCore::SaveResponseToTemporaryFile( |
| scoped_refptr<base::SequencedTaskRunner> file_task_runner) { |
| DCHECK(delegate_task_runner_->BelongsToCurrentThread()); |
| SaveResponseWithWriter(scoped_ptr<URLFetcherResponseWriter>( |
| new URLFetcherFileWriter(file_task_runner, base::FilePath()))); |
| } |
| |
| void URLFetcherCore::SaveResponseWithWriter( |
| scoped_ptr<URLFetcherResponseWriter> response_writer) { |
| DCHECK(delegate_task_runner_->BelongsToCurrentThread()); |
| response_writer_ = response_writer.Pass(); |
| } |
| |
| HttpResponseHeaders* URLFetcherCore::GetResponseHeaders() const { |
| return response_headers_.get(); |
| } |
| |
| // TODO(panayiotis): socket_address_ is written in the IO thread, |
| // if this is accessed in the UI thread, this could result in a race. |
| // Same for response_headers_ above and was_fetched_via_proxy_ below. |
| HostPortPair URLFetcherCore::GetSocketAddress() const { |
| return socket_address_; |
| } |
| |
| bool URLFetcherCore::WasFetchedViaProxy() const { |
| return was_fetched_via_proxy_; |
| } |
| |
| const GURL& URLFetcherCore::GetOriginalURL() const { |
| return original_url_; |
| } |
| |
| const GURL& URLFetcherCore::GetURL() const { |
| return url_; |
| } |
| |
| const URLRequestStatus& URLFetcherCore::GetStatus() const { |
| return status_; |
| } |
| |
| int URLFetcherCore::GetResponseCode() const { |
| return response_code_; |
| } |
| |
| const ResponseCookies& URLFetcherCore::GetCookies() const { |
| return cookies_; |
| } |
| |
| void URLFetcherCore::ReceivedContentWasMalformed() { |
| DCHECK(delegate_task_runner_->BelongsToCurrentThread()); |
| if (network_task_runner_.get()) { |
| network_task_runner_->PostTask( |
| FROM_HERE, base::Bind(&URLFetcherCore::NotifyMalformedContent, this)); |
| } |
| } |
| |
| bool URLFetcherCore::GetResponseAsString( |
| std::string* out_response_string) const { |
| URLFetcherStringWriter* string_writer = |
| response_writer_ ? response_writer_->AsStringWriter() : NULL; |
| if (!string_writer) |
| return false; |
| |
| *out_response_string = string_writer->data(); |
| UMA_HISTOGRAM_MEMORY_KB("UrlFetcher.StringResponseSize", |
| (string_writer->data().length() / 1024)); |
| return true; |
| } |
| |
| bool URLFetcherCore::GetResponseAsFilePath(bool take_ownership, |
| base::FilePath* out_response_path) { |
| DCHECK(delegate_task_runner_->BelongsToCurrentThread()); |
| |
| URLFetcherFileWriter* file_writer = |
| response_writer_ ? response_writer_->AsFileWriter() : NULL; |
| if (!file_writer) |
| return false; |
| |
| *out_response_path = file_writer->file_path(); |
| |
| if (take_ownership) { |
| // Intentionally calling a file_writer_ method directly without posting |
| // the task to network_task_runner_. |
| // |
| // This is for correctly handling the case when file_writer_->DisownFile() |
| // is soon followed by URLFetcherCore::Stop(). We have to make sure that |
| // DisownFile takes effect before Stop deletes file_writer_. |
| // |
| // This direct call should be thread-safe, since DisownFile itself does no |
| // file operation. It just flips the state to be referred in destruction. |
| file_writer->DisownFile(); |
| } |
| return true; |
| } |
| |
| void URLFetcherCore::OnReceivedRedirect(URLRequest* request, |
| const GURL& new_url, |
| bool* defer_redirect) { |
| DCHECK_EQ(request, request_.get()); |
| DCHECK(network_task_runner_->BelongsToCurrentThread()); |
| if (stop_on_redirect_) { |
| stopped_on_redirect_ = true; |
| url_ = new_url; |
| response_code_ = request_->GetResponseCode(); |
| was_fetched_via_proxy_ = request_->was_fetched_via_proxy(); |
| request->Cancel(); |
| OnReadCompleted(request, 0); |
| } |
| } |
| |
| void URLFetcherCore::OnResponseStarted(URLRequest* request) { |
| DCHECK_EQ(request, request_.get()); |
| DCHECK(network_task_runner_->BelongsToCurrentThread()); |
| if (request_->status().is_success()) { |
| response_code_ = request_->GetResponseCode(); |
| response_headers_ = request_->response_headers(); |
| socket_address_ = request_->GetSocketAddress(); |
| was_fetched_via_proxy_ = request_->was_fetched_via_proxy(); |
| total_response_bytes_ = request_->GetExpectedContentSize(); |
| } |
| |
| ReadResponse(); |
| } |
| |
| void URLFetcherCore::OnCertificateRequested( |
| URLRequest* request, |
| SSLCertRequestInfo* cert_request_info) { |
| DCHECK_EQ(request, request_.get()); |
| DCHECK(network_task_runner_->BelongsToCurrentThread()); |
| |
| if (g_ignore_certificate_requests) { |
| request->ContinueWithCertificate(NULL); |
| } else { |
| request->Cancel(); |
| } |
| } |
| |
| void URLFetcherCore::OnReadCompleted(URLRequest* request, |
| int bytes_read) { |
| DCHECK(request == request_); |
| DCHECK(network_task_runner_->BelongsToCurrentThread()); |
| |
| if (!stopped_on_redirect_) |
| url_ = request->url(); |
| URLRequestThrottlerManager* throttler_manager = |
| request->context()->throttler_manager(); |
| if (throttler_manager) { |
| url_throttler_entry_ = throttler_manager->RegisterRequestUrl(url_); |
| } |
| |
| do { |
| if (!request_->status().is_success() || bytes_read <= 0) |
| break; |
| |
| current_response_bytes_ += bytes_read; |
| InformDelegateDownloadProgress(); |
| |
| const int result = |
| WriteBuffer(new DrainableIOBuffer(buffer_.get(), bytes_read)); |
| if (result < 0) { |
| // Write failed or waiting for write completion. |
| return; |
| } |
| } while (request_->Read(buffer_.get(), kBufferSize, &bytes_read)); |
| |
| const URLRequestStatus status = request_->status(); |
| |
| if (status.is_success()) |
| request_->GetResponseCookies(&cookies_); |
| |
| // See comments re: HEAD requests in ReadResponse(). |
| if (!status.is_io_pending() || request_type_ == URLFetcher::HEAD) { |
| status_ = status; |
| ReleaseRequest(); |
| |
| // No more data to write. |
| const int result = response_writer_->Finish( |
| base::Bind(&URLFetcherCore::DidFinishWriting, this)); |
| if (result != ERR_IO_PENDING) |
| DidFinishWriting(result); |
| } |
| } |
| |
| void URLFetcherCore::CancelAll() { |
| g_registry.Get().CancelAll(); |
| } |
| |
| int URLFetcherCore::GetNumFetcherCores() { |
| return g_registry.Get().size(); |
| } |
| |
| void URLFetcherCore::SetEnableInterceptionForTests(bool enabled) { |
| g_interception_enabled = enabled; |
| } |
| |
| void URLFetcherCore::SetIgnoreCertificateRequests(bool ignored) { |
| g_ignore_certificate_requests = ignored; |
| } |
| |
| URLFetcherCore::~URLFetcherCore() { |
| // |request_| should be NULL. If not, it's unsafe to delete it here since we |
| // may not be on the IO thread. |
| DCHECK(!request_.get()); |
| } |
| |
| void URLFetcherCore::StartOnIOThread() { |
| DCHECK(network_task_runner_->BelongsToCurrentThread()); |
| |
| if (!response_writer_) |
| response_writer_.reset(new URLFetcherStringWriter); |
| |
| const int result = response_writer_->Initialize( |
| base::Bind(&URLFetcherCore::DidInitializeWriter, this)); |
| if (result != ERR_IO_PENDING) |
| DidInitializeWriter(result); |
| } |
| |
| void URLFetcherCore::StartURLRequest() { |
| DCHECK(network_task_runner_->BelongsToCurrentThread()); |
| |
| if (was_cancelled_) { |
| // Since StartURLRequest() is posted as a *delayed* task, it may |
| // run after the URLFetcher was already stopped. |
| return; |
| } |
| |
| DCHECK(request_context_getter_.get()); |
| DCHECK(!request_.get()); |
| |
| g_registry.Get().AddURLFetcherCore(this); |
| current_response_bytes_ = 0; |
| request_ = request_context_getter_->GetURLRequestContext()->CreateRequest( |
| original_url_, DEFAULT_PRIORITY, this); |
| request_->set_stack_trace(stack_trace_); |
| int flags = request_->load_flags() | load_flags_; |
| if (!g_interception_enabled) |
| flags = flags | LOAD_DISABLE_INTERCEPT; |
| |
| if (is_chunked_upload_) |
| request_->EnableChunkedUpload(); |
| request_->SetLoadFlags(flags); |
| request_->SetReferrer(referrer_); |
| request_->set_first_party_for_cookies(first_party_for_cookies_.is_empty() ? |
| original_url_ : first_party_for_cookies_); |
| if (url_request_data_key_ && !url_request_create_data_callback_.is_null()) { |
| request_->SetUserData(url_request_data_key_, |
| url_request_create_data_callback_.Run()); |
| } |
| |
| switch (request_type_) { |
| case URLFetcher::GET: |
| break; |
| |
| case URLFetcher::POST: |
| case URLFetcher::PUT: |
| case URLFetcher::PATCH: |
| // Upload content must be set. |
| DCHECK(is_chunked_upload_ || upload_content_set_); |
| |
| request_->set_method( |
| request_type_ == URLFetcher::POST ? "POST" : |
| request_type_ == URLFetcher::PUT ? "PUT" : "PATCH"); |
| if (!upload_content_type_.empty()) { |
| extra_request_headers_.SetHeader(HttpRequestHeaders::kContentType, |
| upload_content_type_); |
| } |
| if (!upload_content_.empty()) { |
| scoped_ptr<UploadElementReader> reader(new UploadBytesElementReader( |
| upload_content_.data(), upload_content_.size())); |
| request_->set_upload(make_scoped_ptr( |
| UploadDataStream::CreateWithReader(reader.Pass(), 0))); |
| } else if (!upload_file_path_.empty()) { |
| scoped_ptr<UploadElementReader> reader( |
| new UploadFileElementReader(upload_file_task_runner_.get(), |
| upload_file_path_, |
| upload_range_offset_, |
| upload_range_length_, |
| base::Time())); |
| request_->set_upload(make_scoped_ptr( |
| UploadDataStream::CreateWithReader(reader.Pass(), 0))); |
| } |
| |
| current_upload_bytes_ = -1; |
| // TODO(kinaba): http://crbug.com/118103. Implement upload callback in the |
| // layer and avoid using timer here. |
| upload_progress_checker_timer_.reset( |
| new base::RepeatingTimer<URLFetcherCore>()); |
| upload_progress_checker_timer_->Start( |
| FROM_HERE, |
| base::TimeDelta::FromMilliseconds(kUploadProgressTimerInterval), |
| this, |
| &URLFetcherCore::InformDelegateUploadProgress); |
| break; |
| |
| case URLFetcher::HEAD: |
| request_->set_method("HEAD"); |
| break; |
| |
| case URLFetcher::DELETE_REQUEST: |
| request_->set_method("DELETE"); |
| break; |
| |
| default: |
| NOTREACHED(); |
| } |
| |
| if (!extra_request_headers_.IsEmpty()) |
| request_->SetExtraRequestHeaders(extra_request_headers_); |
| |
| request_->Start(); |
| } |
| |
| void URLFetcherCore::DidInitializeWriter(int result) { |
| if (result != OK) { |
| CancelURLRequest(result); |
| delegate_task_runner_->PostTask( |
| FROM_HERE, |
| base::Bind(&URLFetcherCore::InformDelegateFetchIsComplete, this)); |
| return; |
| } |
| StartURLRequestWhenAppropriate(); |
| } |
| |
| void URLFetcherCore::StartURLRequestWhenAppropriate() { |
| DCHECK(network_task_runner_->BelongsToCurrentThread()); |
| |
| if (was_cancelled_) |
| return; |
| |
| DCHECK(request_context_getter_.get()); |
| |
| int64 delay = 0LL; |
| if (original_url_throttler_entry_.get() == NULL) { |
| URLRequestThrottlerManager* manager = |
| request_context_getter_->GetURLRequestContext()->throttler_manager(); |
| if (manager) { |
| original_url_throttler_entry_ = |
| manager->RegisterRequestUrl(original_url_); |
| } |
| } |
| if (original_url_throttler_entry_.get() != NULL) { |
| delay = original_url_throttler_entry_->ReserveSendingTimeForNextRequest( |
| GetBackoffReleaseTime()); |
| } |
| |
| if (delay == 0) { |
| StartURLRequest(); |
| } else { |
| base::ThreadTaskRunnerHandle::Get()->PostDelayedTask( |
| FROM_HERE, base::Bind(&URLFetcherCore::StartURLRequest, this), |
| base::TimeDelta::FromMilliseconds(delay)); |
| } |
| } |
| |
| void URLFetcherCore::CancelURLRequest(int error) { |
| DCHECK(network_task_runner_->BelongsToCurrentThread()); |
| |
| if (request_.get()) { |
| request_->CancelWithError(error); |
| ReleaseRequest(); |
| } |
| |
| // Set the error manually. |
| // Normally, calling URLRequest::CancelWithError() results in calling |
| // OnReadCompleted() with bytes_read = -1 via an asynchronous task posted by |
| // URLRequestJob::NotifyDone(). But, because the request was released |
| // immediately after being canceled, the request could not call |
| // OnReadCompleted() which overwrites |status_| with the error status. |
| status_.set_status(URLRequestStatus::CANCELED); |
| status_.set_error(error); |
| |
| // Release the reference to the request context. There could be multiple |
| // references to URLFetcher::Core at this point so it may take a while to |
| // delete the object, but we cannot delay the destruction of the request |
| // context. |
| request_context_getter_ = NULL; |
| first_party_for_cookies_ = GURL(); |
| url_request_data_key_ = NULL; |
| url_request_create_data_callback_.Reset(); |
| was_cancelled_ = true; |
| } |
| |
| void URLFetcherCore::OnCompletedURLRequest( |
| base::TimeDelta backoff_delay) { |
| DCHECK(delegate_task_runner_->BelongsToCurrentThread()); |
| |
| // Save the status and backoff_delay so that delegates can read it. |
| if (delegate_) { |
| backoff_delay_ = backoff_delay; |
| InformDelegateFetchIsComplete(); |
| } |
| } |
| |
| void URLFetcherCore::InformDelegateFetchIsComplete() { |
| DCHECK(delegate_task_runner_->BelongsToCurrentThread()); |
| if (delegate_) |
| delegate_->OnURLFetchComplete(fetcher_); |
| } |
| |
| void URLFetcherCore::NotifyMalformedContent() { |
| DCHECK(network_task_runner_->BelongsToCurrentThread()); |
| if (url_throttler_entry_.get() != NULL) { |
| int status_code = response_code_; |
| if (status_code == URLFetcher::RESPONSE_CODE_INVALID) { |
| // The status code will generally be known by the time clients |
| // call the |ReceivedContentWasMalformed()| function (which ends up |
| // calling the current function) but if it's not, we need to assume |
| // the response was successful so that the total failure count |
| // used to calculate exponential back-off goes up. |
| status_code = 200; |
| } |
| url_throttler_entry_->ReceivedContentWasMalformed(status_code); |
| } |
| } |
| |
| void URLFetcherCore::DidFinishWriting(int result) { |
| if (result != OK) { |
| CancelURLRequest(result); |
| delegate_task_runner_->PostTask( |
| FROM_HERE, |
| base::Bind(&URLFetcherCore::InformDelegateFetchIsComplete, this)); |
| return; |
| } |
| // If the file was successfully closed, then the URL request is complete. |
| RetryOrCompleteUrlFetch(); |
| } |
| |
| void URLFetcherCore::RetryOrCompleteUrlFetch() { |
| DCHECK(network_task_runner_->BelongsToCurrentThread()); |
| base::TimeDelta backoff_delay; |
| |
| // Checks the response from server. |
| if (response_code_ >= 500 || |
| status_.error() == ERR_TEMPORARILY_THROTTLED) { |
| // When encountering a server error, we will send the request again |
| // after backoff time. |
| ++num_retries_on_5xx_; |
| |
| // Note that backoff_delay may be 0 because (a) the |
| // URLRequestThrottlerManager and related code does not |
| // necessarily back off on the first error, (b) it only backs off |
| // on some of the 5xx status codes, (c) not all URLRequestContexts |
| // have a throttler manager. |
| base::TimeTicks backoff_release_time = GetBackoffReleaseTime(); |
| backoff_delay = backoff_release_time - base::TimeTicks::Now(); |
| if (backoff_delay < base::TimeDelta()) |
| backoff_delay = base::TimeDelta(); |
| |
| if (automatically_retry_on_5xx_ && |
| num_retries_on_5xx_ <= max_retries_on_5xx_) { |
| StartOnIOThread(); |
| return; |
| } |
| } else { |
| backoff_delay = base::TimeDelta(); |
| } |
| |
| // Retry if the request failed due to network changes. |
| if (status_.error() == ERR_NETWORK_CHANGED && |
| num_retries_on_network_changes_ < max_retries_on_network_changes_) { |
| ++num_retries_on_network_changes_; |
| |
| // Retry soon, after flushing all the current tasks which may include |
| // further network change observers. |
| network_task_runner_->PostTask( |
| FROM_HERE, base::Bind(&URLFetcherCore::StartOnIOThread, this)); |
| return; |
| } |
| |
| request_context_getter_ = NULL; |
| first_party_for_cookies_ = GURL(); |
| url_request_data_key_ = NULL; |
| url_request_create_data_callback_.Reset(); |
| bool posted = delegate_task_runner_->PostTask( |
| FROM_HERE, |
| base::Bind(&URLFetcherCore::OnCompletedURLRequest, this, backoff_delay)); |
| |
| // If the delegate message loop does not exist any more, then the delegate |
| // should be gone too. |
| DCHECK(posted || !delegate_); |
| } |
| |
| void URLFetcherCore::ReleaseRequest() { |
| upload_progress_checker_timer_.reset(); |
| request_.reset(); |
| g_registry.Get().RemoveURLFetcherCore(this); |
| } |
| |
| base::TimeTicks URLFetcherCore::GetBackoffReleaseTime() { |
| DCHECK(network_task_runner_->BelongsToCurrentThread()); |
| |
| if (original_url_throttler_entry_.get()) { |
| base::TimeTicks original_url_backoff = |
| original_url_throttler_entry_->GetExponentialBackoffReleaseTime(); |
| base::TimeTicks destination_url_backoff; |
| if (url_throttler_entry_.get() != NULL && |
| original_url_throttler_entry_.get() != url_throttler_entry_.get()) { |
| destination_url_backoff = |
| url_throttler_entry_->GetExponentialBackoffReleaseTime(); |
| } |
| |
| return original_url_backoff > destination_url_backoff ? |
| original_url_backoff : destination_url_backoff; |
| } else { |
| return base::TimeTicks(); |
| } |
| } |
| |
| void URLFetcherCore::CompleteAddingUploadDataChunk( |
| const std::string& content, bool is_last_chunk) { |
| if (was_cancelled_) { |
| // Since CompleteAddingUploadDataChunk() is posted as a *delayed* task, it |
| // may run after the URLFetcher was already stopped. |
| return; |
| } |
| DCHECK(is_chunked_upload_); |
| DCHECK(request_.get()); |
| DCHECK(!content.empty()); |
| request_->AppendChunkToUpload(content.data(), |
| static_cast<int>(content.length()), |
| is_last_chunk); |
| } |
| |
| int URLFetcherCore::WriteBuffer(scoped_refptr<DrainableIOBuffer> data) { |
| while (data->BytesRemaining() > 0) { |
| const int result = response_writer_->Write( |
| data.get(), |
| data->BytesRemaining(), |
| base::Bind(&URLFetcherCore::DidWriteBuffer, this, data)); |
| if (result < 0) { |
| if (result != ERR_IO_PENDING) |
| DidWriteBuffer(data, result); |
| return result; |
| } |
| data->DidConsume(result); |
| } |
| return OK; |
| } |
| |
| void URLFetcherCore::DidWriteBuffer(scoped_refptr<DrainableIOBuffer> data, |
| int result) { |
| if (result < 0) { // Handle errors. |
| CancelURLRequest(result); |
| response_writer_->Finish(base::Bind(&EmptyCompletionCallback)); |
| delegate_task_runner_->PostTask( |
| FROM_HERE, |
| base::Bind(&URLFetcherCore::InformDelegateFetchIsComplete, this)); |
| return; |
| } |
| |
| // Continue writing. |
| data->DidConsume(result); |
| if (WriteBuffer(data) < 0) |
| return; |
| |
| // Finished writing buffer_. Read some more, unless the request has been |
| // cancelled and deleted. |
| DCHECK_EQ(0, data->BytesRemaining()); |
| if (request_.get()) |
| ReadResponse(); |
| } |
| |
| void URLFetcherCore::ReadResponse() { |
| // Some servers may treat HEAD requests as GET requests. To free up the |
| // network connection as soon as possible, signal that the request has |
| // completed immediately, without trying to read any data back (all we care |
| // about is the response code and headers, which we already have). |
| int bytes_read = 0; |
| if (request_->status().is_success() && |
| (request_type_ != URLFetcher::HEAD)) |
| request_->Read(buffer_.get(), kBufferSize, &bytes_read); |
| OnReadCompleted(request_.get(), bytes_read); |
| } |
| |
| void URLFetcherCore::InformDelegateUploadProgress() { |
| DCHECK(network_task_runner_->BelongsToCurrentThread()); |
| if (request_.get()) { |
| int64 current = request_->GetUploadProgress().position(); |
| if (current_upload_bytes_ != current) { |
| current_upload_bytes_ = current; |
| int64 total = -1; |
| if (!is_chunked_upload_) { |
| total = static_cast<int64>(request_->GetUploadProgress().size()); |
| // Total may be zero if the UploadDataStream::Init has not been called |
| // yet. Don't send the upload progress until the size is initialized. |
| if (!total) |
| return; |
| } |
| delegate_task_runner_->PostTask( |
| FROM_HERE, |
| base::Bind( |
| &URLFetcherCore::InformDelegateUploadProgressInDelegateThread, |
| this, current, total)); |
| } |
| } |
| } |
| |
| void URLFetcherCore::InformDelegateUploadProgressInDelegateThread( |
| int64 current, int64 total) { |
| DCHECK(delegate_task_runner_->BelongsToCurrentThread()); |
| if (delegate_) |
| delegate_->OnURLFetchUploadProgress(fetcher_, current, total); |
| } |
| |
| void URLFetcherCore::InformDelegateDownloadProgress() { |
| DCHECK(network_task_runner_->BelongsToCurrentThread()); |
| delegate_task_runner_->PostTask( |
| FROM_HERE, |
| base::Bind( |
| &URLFetcherCore::InformDelegateDownloadProgressInDelegateThread, |
| this, current_response_bytes_, total_response_bytes_)); |
| } |
| |
| void URLFetcherCore::InformDelegateDownloadProgressInDelegateThread( |
| int64 current, int64 total) { |
| DCHECK(delegate_task_runner_->BelongsToCurrentThread()); |
| if (delegate_) |
| delegate_->OnURLFetchDownloadProgress(fetcher_, current, total); |
| } |
| |
| } // namespace net |