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url_request_http_job.cc
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// 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_request_http_job.h"
#include "base/base_switches.h"
#include "base/bind.h"
#include "base/bind_helpers.h"
#include "base/command_line.h"
#include "base/compiler_specific.h"
#include "base/file_version_info.h"
#include "base/location.h"
#include "base/metrics/field_trial.h"
#include "base/metrics/histogram_macros.h"
#include "base/profiler/scoped_tracker.h"
#include "base/rand_util.h"
#include "base/single_thread_task_runner.h"
#include "base/strings/string_util.h"
#include "base/thread_task_runner_handle.h"
#include "base/time/time.h"
#include "base/values.h"
#include "net/base/host_port_pair.h"
#include "net/base/load_flags.h"
#include "net/base/net_errors.h"
#include "net/base/net_util.h"
#include "net/base/network_delegate.h"
#include "net/base/sdch_manager.h"
#include "net/base/sdch_net_log_params.h"
#include "net/cert/cert_status_flags.h"
#include "net/cookies/cookie_store.h"
#include "net/http/http_content_disposition.h"
#include "net/http/http_network_session.h"
#include "net/http/http_request_headers.h"
#include "net/http/http_response_headers.h"
#include "net/http/http_response_info.h"
#include "net/http/http_status_code.h"
#include "net/http/http_transaction.h"
#include "net/http/http_transaction_factory.h"
#include "net/http/http_util.h"
#include "net/proxy/proxy_info.h"
#include "net/ssl/ssl_cert_request_info.h"
#include "net/ssl/ssl_config_service.h"
#include "net/url_request/fraudulent_certificate_reporter.h"
#include "net/url_request/http_user_agent_settings.h"
#include "net/url_request/url_request.h"
#include "net/url_request/url_request_backoff_manager.h"
#include "net/url_request/url_request_context.h"
#include "net/url_request/url_request_error_job.h"
#include "net/url_request/url_request_job_factory.h"
#include "net/url_request/url_request_redirect_job.h"
#include "net/url_request/url_request_throttler_manager.h"
#include "net/websockets/websocket_handshake_stream_base.h"
static const char kAvailDictionaryHeader[] = "Avail-Dictionary";
namespace net {
class URLRequestHttpJob::HttpFilterContext : public FilterContext {
public:
explicit HttpFilterContext(URLRequestHttpJob* job);
~HttpFilterContext() override;
// FilterContext implementation.
bool GetMimeType(std::string* mime_type) const override;
bool GetURL(GURL* gurl) const override;
base::Time GetRequestTime() const override;
bool IsCachedContent() const override;
SdchManager::DictionarySet* SdchDictionariesAdvertised() const override;
int64 GetByteReadCount() const override;
int GetResponseCode() const override;
const URLRequestContext* GetURLRequestContext() const override;
void RecordPacketStats(StatisticSelector statistic) const override;
const BoundNetLog& GetNetLog() const override;
private:
URLRequestHttpJob* job_;
// URLRequestHttpJob may be detached from URLRequest, but we still need to
// return something.
BoundNetLog dummy_log_;
DISALLOW_COPY_AND_ASSIGN(HttpFilterContext);
};
URLRequestHttpJob::HttpFilterContext::HttpFilterContext(URLRequestHttpJob* job)
: job_(job) {
DCHECK(job_);
}
URLRequestHttpJob::HttpFilterContext::~HttpFilterContext() {
}
bool URLRequestHttpJob::HttpFilterContext::GetMimeType(
std::string* mime_type) const {
return job_->GetMimeType(mime_type);
}
bool URLRequestHttpJob::HttpFilterContext::GetURL(GURL* gurl) const {
if (!job_->request())
return false;
*gurl = job_->request()->url();
return true;
}
base::Time URLRequestHttpJob::HttpFilterContext::GetRequestTime() const {
return job_->request() ? job_->request()->request_time() : base::Time();
}
bool URLRequestHttpJob::HttpFilterContext::IsCachedContent() const {
return job_->is_cached_content_;
}
SdchManager::DictionarySet*
URLRequestHttpJob::HttpFilterContext::SdchDictionariesAdvertised() const {
return job_->dictionaries_advertised_.get();
}
int64 URLRequestHttpJob::HttpFilterContext::GetByteReadCount() const {
return job_->prefilter_bytes_read();
}
int URLRequestHttpJob::HttpFilterContext::GetResponseCode() const {
return job_->GetResponseCode();
}
const URLRequestContext*
URLRequestHttpJob::HttpFilterContext::GetURLRequestContext() const {
return job_->request() ? job_->request()->context() : NULL;
}
void URLRequestHttpJob::HttpFilterContext::RecordPacketStats(
StatisticSelector statistic) const {
job_->RecordPacketStats(statistic);
}
const BoundNetLog& URLRequestHttpJob::HttpFilterContext::GetNetLog() const {
return job_->request() ? job_->request()->net_log() : dummy_log_;
}
// TODO(darin): make sure the port blocking code is not lost
// static
URLRequestJob* URLRequestHttpJob::Factory(URLRequest* request,
NetworkDelegate* network_delegate,
const std::string& scheme) {
DCHECK(scheme == "http" || scheme == "https" || scheme == "ws" ||
scheme == "wss");
if (!request->context()->http_transaction_factory()) {
NOTREACHED() << "requires a valid context";
return new URLRequestErrorJob(
request, network_delegate, ERR_INVALID_ARGUMENT);
}
GURL redirect_url;
if (request->GetHSTSRedirect(&redirect_url)) {
return new URLRequestRedirectJob(
request, network_delegate, redirect_url,
// Use status code 307 to preserve the method, so POST requests work.
URLRequestRedirectJob::REDIRECT_307_TEMPORARY_REDIRECT, "HSTS");
}
return new URLRequestHttpJob(request,
network_delegate,
request->context()->http_user_agent_settings());
}
URLRequestHttpJob::URLRequestHttpJob(
URLRequest* request,
NetworkDelegate* network_delegate,
const HttpUserAgentSettings* http_user_agent_settings)
: URLRequestJob(request, network_delegate),
priority_(DEFAULT_PRIORITY),
response_info_(NULL),
response_cookies_save_index_(0),
proxy_auth_state_(AUTH_STATE_DONT_NEED_AUTH),
server_auth_state_(AUTH_STATE_DONT_NEED_AUTH),
start_callback_(base::Bind(&URLRequestHttpJob::OnStartCompleted,
base::Unretained(this))),
notify_before_headers_sent_callback_(
base::Bind(&URLRequestHttpJob::NotifyBeforeSendHeadersCallback,
base::Unretained(this))),
read_in_progress_(false),
throttling_entry_(NULL),
sdch_test_activated_(false),
sdch_test_control_(false),
is_cached_content_(false),
request_creation_time_(),
packet_timing_enabled_(false),
done_(false),
bytes_observed_in_packets_(0),
request_time_snapshot_(),
final_packet_time_(),
filter_context_(new HttpFilterContext(this)),
on_headers_received_callback_(
base::Bind(&URLRequestHttpJob::OnHeadersReceivedCallback,
base::Unretained(this))),
awaiting_callback_(false),
http_user_agent_settings_(http_user_agent_settings),
backoff_manager_(request->context()->backoff_manager()),
weak_factory_(this) {
URLRequestThrottlerManager* manager = request->context()->throttler_manager();
if (manager)
throttling_entry_ = manager->RegisterRequestUrl(request->url());
ResetTimer();
}
URLRequestHttpJob::~URLRequestHttpJob() {
CHECK(!awaiting_callback_);
DCHECK(!sdch_test_control_ || !sdch_test_activated_);
if (!is_cached_content_) {
if (sdch_test_control_)
RecordPacketStats(FilterContext::SDCH_EXPERIMENT_HOLDBACK);
if (sdch_test_activated_)
RecordPacketStats(FilterContext::SDCH_EXPERIMENT_DECODE);
}
// Make sure SDCH filters are told to emit histogram data while
// filter_context_ is still alive.
DestroyFilters();
DoneWithRequest(ABORTED);
}
void URLRequestHttpJob::SetPriority(RequestPriority priority) {
priority_ = priority;
if (transaction_)
transaction_->SetPriority(priority_);
}
void URLRequestHttpJob::Start() {
// TODO(mmenke): Remove ScopedTracker below once crbug.com/456327 is fixed.
tracked_objects::ScopedTracker tracking_profile(
FROM_HERE_WITH_EXPLICIT_FUNCTION("456327 URLRequestHttpJob::Start"));
DCHECK(!transaction_.get());
// URLRequest::SetReferrer ensures that we do not send username and password
// fields in the referrer.
GURL referrer(request_->referrer());
request_info_.url = request_->url();
request_info_.method = request_->method();
request_info_.load_flags = request_->load_flags();
// Enable privacy mode if cookie settings or flags tell us not send or
// save cookies.
bool enable_privacy_mode =
(request_info_.load_flags & LOAD_DO_NOT_SEND_COOKIES) ||
(request_info_.load_flags & LOAD_DO_NOT_SAVE_COOKIES) ||
CanEnablePrivacyMode();
// Privacy mode could still be disabled in OnCookiesLoaded if we are going
// to send previously saved cookies.
request_info_.privacy_mode = enable_privacy_mode ?
PRIVACY_MODE_ENABLED : PRIVACY_MODE_DISABLED;
// Strip Referer from request_info_.extra_headers to prevent, e.g., plugins
// from overriding headers that are controlled using other means. Otherwise a
// plugin could set a referrer although sending the referrer is inhibited.
request_info_.extra_headers.RemoveHeader(HttpRequestHeaders::kReferer);
// Our consumer should have made sure that this is a safe referrer. See for
// instance WebCore::FrameLoader::HideReferrer.
if (referrer.is_valid()) {
request_info_.extra_headers.SetHeader(HttpRequestHeaders::kReferer,
referrer.spec());
}
request_info_.extra_headers.SetHeaderIfMissing(
HttpRequestHeaders::kUserAgent,
http_user_agent_settings_ ?
http_user_agent_settings_->GetUserAgent() : std::string());
AddExtraHeaders();
AddCookieHeaderAndStart();
}
void URLRequestHttpJob::Kill() {
if (!transaction_.get())
return;
weak_factory_.InvalidateWeakPtrs();
DestroyTransaction();
URLRequestJob::Kill();
}
void URLRequestHttpJob::GetConnectionAttempts(ConnectionAttempts* out) const {
if (transaction_)
transaction_->GetConnectionAttempts(out);
else
out->clear();
}
void URLRequestHttpJob::NotifyBeforeSendProxyHeadersCallback(
const ProxyInfo& proxy_info,
HttpRequestHeaders* request_headers) {
DCHECK(request_headers);
DCHECK_NE(URLRequestStatus::CANCELED, GetStatus().status());
if (network_delegate()) {
network_delegate()->NotifyBeforeSendProxyHeaders(
request_,
proxy_info,
request_headers);
}
}
void URLRequestHttpJob::NotifyBeforeNetworkStart(bool* defer) {
if (!request_)
return;
if (backoff_manager_) {
if (backoff_manager_->ShouldRejectRequest(request()->url(),
request()->request_time())) {
*defer = true;
base::MessageLoop::current()->PostTask(
FROM_HERE,
base::Bind(&URLRequestHttpJob::OnStartCompleted,
weak_factory_.GetWeakPtr(), ERR_TEMPORARY_BACKOFF));
return;
}
}
URLRequestJob::NotifyBeforeNetworkStart(defer);
}
void URLRequestHttpJob::NotifyHeadersComplete() {
DCHECK(!response_info_);
response_info_ = transaction_->GetResponseInfo();
// Save boolean, as we'll need this info at destruction time, and filters may
// also need this info.
is_cached_content_ = response_info_->was_cached;
if (!is_cached_content_ && throttling_entry_.get())
throttling_entry_->UpdateWithResponse(GetResponseCode());
if (!is_cached_content_)
ProcessBackoffHeader();
// The ordering of these calls is not important.
ProcessStrictTransportSecurityHeader();
ProcessPublicKeyPinsHeader();
// Handle the server notification of a new SDCH dictionary.
SdchManager* sdch_manager(request()->context()->sdch_manager());
if (sdch_manager) {
SdchProblemCode rv = sdch_manager->IsInSupportedDomain(request()->url());
if (rv != SDCH_OK) {
// If SDCH is just disabled, it is not a real error.
if (rv != SDCH_DISABLED) {
SdchManager::SdchErrorRecovery(rv);
request()->net_log().AddEvent(
NetLog::TYPE_SDCH_DECODING_ERROR,
base::Bind(&NetLogSdchResourceProblemCallback, rv));
}
} else {
const std::string name = "Get-Dictionary";
std::string url_text;
void* iter = NULL;
// TODO(jar): We need to not fetch dictionaries the first time they are
// seen, but rather wait until we can justify their usefulness.
// For now, we will only fetch the first dictionary, which will at least
// require multiple suggestions before we get additional ones for this
// site. Eventually we should wait until a dictionary is requested
// several times
// before we even download it (so that we don't waste memory or
// bandwidth).
if (GetResponseHeaders()->EnumerateHeader(&iter, name, &url_text)) {
// Resolve suggested URL relative to request url.
GURL sdch_dictionary_url = request_->url().Resolve(url_text);
if (sdch_dictionary_url.is_valid()) {
rv = sdch_manager->OnGetDictionary(request_->url(),
sdch_dictionary_url);
if (rv != SDCH_OK) {
SdchManager::SdchErrorRecovery(rv);
request_->net_log().AddEvent(
NetLog::TYPE_SDCH_DICTIONARY_ERROR,
base::Bind(&NetLogSdchDictionaryFetchProblemCallback, rv,
sdch_dictionary_url, false));
}
}
}
}
}
// Handle the server signalling no SDCH encoding.
if (dictionaries_advertised_) {
// We are wary of proxies that discard or damage SDCH encoding. If a server
// explicitly states that this is not SDCH content, then we can correct our
// assumption that this is an SDCH response, and avoid the need to recover
// as though the content is corrupted (when we discover it is not SDCH
// encoded).
std::string sdch_response_status;
void* iter = NULL;
while (GetResponseHeaders()->EnumerateHeader(&iter, "X-Sdch-Encode",
&sdch_response_status)) {
if (sdch_response_status == "0") {
dictionaries_advertised_.reset();
break;
}
}
}
// The HTTP transaction may be restarted several times for the purposes
// of sending authorization information. Each time it restarts, we get
// notified of the headers completion so that we can update the cookie store.
if (transaction_->IsReadyToRestartForAuth()) {
DCHECK(!response_info_->auth_challenge.get());
// TODO(battre): This breaks the webrequest API for
// URLRequestTestHTTP.BasicAuthWithCookies
// where OnBeforeSendHeaders -> OnSendHeaders -> OnBeforeSendHeaders
// occurs.
RestartTransactionWithAuth(AuthCredentials());
return;
}
URLRequestJob::NotifyHeadersComplete();
}
void URLRequestHttpJob::NotifyDone(const URLRequestStatus& status) {
DoneWithRequest(FINISHED);
URLRequestJob::NotifyDone(status);
}
void URLRequestHttpJob::DestroyTransaction() {
DCHECK(transaction_.get());
DoneWithRequest(ABORTED);
transaction_.reset();
response_info_ = NULL;
receive_headers_end_ = base::TimeTicks();
}
void URLRequestHttpJob::StartTransaction() {
// TODO(mmenke): Remove ScopedTracker below once crbug.com/456327 is fixed.
tracked_objects::ScopedTracker tracking_profile(
FROM_HERE_WITH_EXPLICIT_FUNCTION(
"456327 URLRequestHttpJob::StartTransaction"));
if (network_delegate()) {
OnCallToDelegate();
int rv = network_delegate()->NotifyBeforeSendHeaders(
request_, notify_before_headers_sent_callback_,
&request_info_.extra_headers);
// If an extension blocks the request, we rely on the callback to
// MaybeStartTransactionInternal().
if (rv == ERR_IO_PENDING)
return;
MaybeStartTransactionInternal(rv);
return;
}
StartTransactionInternal();
}
void URLRequestHttpJob::NotifyBeforeSendHeadersCallback(int result) {
// Check that there are no callbacks to already canceled requests.
DCHECK_NE(URLRequestStatus::CANCELED, GetStatus().status());
MaybeStartTransactionInternal(result);
}
void URLRequestHttpJob::MaybeStartTransactionInternal(int result) {
// TODO(mmenke): Remove ScopedTracker below once crbug.com/456327 is fixed.
tracked_objects::ScopedTracker tracking_profile(
FROM_HERE_WITH_EXPLICIT_FUNCTION(
"456327 URLRequestHttpJob::MaybeStartTransactionInternal"));
OnCallToDelegateComplete();
if (result == OK) {
StartTransactionInternal();
} else {
std::string source("delegate");
request_->net_log().AddEvent(NetLog::TYPE_CANCELLED,
NetLog::StringCallback("source", &source));
NotifyCanceled();
NotifyStartError(URLRequestStatus(URLRequestStatus::FAILED, result));
}
}
void URLRequestHttpJob::StartTransactionInternal() {
// NOTE: This method assumes that request_info_ is already setup properly.
// If we already have a transaction, then we should restart the transaction
// with auth provided by auth_credentials_.
int rv;
if (network_delegate()) {
network_delegate()->NotifySendHeaders(
request_, request_info_.extra_headers);
}
if (transaction_.get()) {
rv = transaction_->RestartWithAuth(auth_credentials_, start_callback_);
auth_credentials_ = AuthCredentials();
} else {
DCHECK(request_->context()->http_transaction_factory());
rv = request_->context()->http_transaction_factory()->CreateTransaction(
priority_, &transaction_);
if (rv == OK && request_info_.url.SchemeIsWSOrWSS()) {
base::SupportsUserData::Data* data = request_->GetUserData(
WebSocketHandshakeStreamBase::CreateHelper::DataKey());
if (data) {
transaction_->SetWebSocketHandshakeStreamCreateHelper(
static_cast<WebSocketHandshakeStreamBase::CreateHelper*>(data));
} else {
rv = ERR_DISALLOWED_URL_SCHEME;
}
}
if (rv == OK) {
transaction_->SetBeforeNetworkStartCallback(
base::Bind(&URLRequestHttpJob::NotifyBeforeNetworkStart,
base::Unretained(this)));
transaction_->SetBeforeProxyHeadersSentCallback(
base::Bind(&URLRequestHttpJob::NotifyBeforeSendProxyHeadersCallback,
base::Unretained(this)));
if (!throttling_entry_.get() ||
!throttling_entry_->ShouldRejectRequest(*request_)) {
rv = transaction_->Start(
&request_info_, start_callback_, request_->net_log());
start_time_ = base::TimeTicks::Now();
} else {
// Special error code for the exponential back-off module.
rv = ERR_TEMPORARILY_THROTTLED;
}
}
}
if (rv == ERR_IO_PENDING)
return;
// The transaction started synchronously, but we need to notify the
// URLRequest delegate via the message loop.
base::ThreadTaskRunnerHandle::Get()->PostTask(
FROM_HERE, base::Bind(&URLRequestHttpJob::OnStartCompleted,
weak_factory_.GetWeakPtr(), rv));
}
void URLRequestHttpJob::AddExtraHeaders() {
SdchManager* sdch_manager = request()->context()->sdch_manager();
// Supply Accept-Encoding field only if it is not already provided.
// It should be provided IF the content is known to have restrictions on
// potential encoding, such as streaming multi-media.
// For details see bug 47381.
// TODO(jar, enal): jpeg files etc. should set up a request header if
// possible. Right now it is done only by buffered_resource_loader and
// simple_data_source.
if (!request_info_.extra_headers.HasHeader(
HttpRequestHeaders::kAcceptEncoding)) {
// We don't support SDCH responses to POST as there is a possibility
// of having SDCH encoded responses returned (e.g. by the cache)
// which we cannot decode, and in those situations, we will need
// to retransmit the request without SDCH, which is illegal for a POST.
bool advertise_sdch = sdch_manager != NULL && request()->method() != "POST";
if (advertise_sdch) {
SdchProblemCode rv = sdch_manager->IsInSupportedDomain(request()->url());
if (rv != SDCH_OK) {
advertise_sdch = false;
// If SDCH is just disabled, it is not a real error.
if (rv != SDCH_DISABLED) {
SdchManager::SdchErrorRecovery(rv);
request()->net_log().AddEvent(
NetLog::TYPE_SDCH_DECODING_ERROR,
base::Bind(&NetLogSdchResourceProblemCallback, rv));
}
}
}
if (advertise_sdch) {
dictionaries_advertised_ =
sdch_manager->GetDictionarySet(request_->url());
}
// The AllowLatencyExperiment() is only true if we've successfully done a
// full SDCH compression recently in this browser session for this host.
// Note that for this path, there might be no applicable dictionaries,
// and hence we can't participate in the experiment.
if (dictionaries_advertised_ &&
sdch_manager->AllowLatencyExperiment(request_->url())) {
// We are participating in the test (or control), and hence we'll
// eventually record statistics via either SDCH_EXPERIMENT_DECODE or
// SDCH_EXPERIMENT_HOLDBACK, and we'll need some packet timing data.
packet_timing_enabled_ = true;
if (base::RandDouble() < .01) {
sdch_test_control_ = true; // 1% probability.
dictionaries_advertised_.reset();
advertise_sdch = false;
} else {
sdch_test_activated_ = true;
}
}
// Supply Accept-Encoding headers first so that it is more likely that they
// will be in the first transmitted packet. This can sometimes make it
// easier to filter and analyze the streams to assure that a proxy has not
// damaged these headers. Some proxies deliberately corrupt Accept-Encoding
// headers.
if (!advertise_sdch) {
// Tell the server what compression formats we support (other than SDCH).
request_info_.extra_headers.SetHeader(
HttpRequestHeaders::kAcceptEncoding, "gzip, deflate");
} else {
// Include SDCH in acceptable list.
request_info_.extra_headers.SetHeader(
HttpRequestHeaders::kAcceptEncoding, "gzip, deflate, sdch");
if (dictionaries_advertised_) {
request_info_.extra_headers.SetHeader(
kAvailDictionaryHeader,
dictionaries_advertised_->GetDictionaryClientHashList());
// Since we're tagging this transaction as advertising a dictionary,
// we'll definitely employ an SDCH filter (or tentative sdch filter)
// when we get a response. When done, we'll record histograms via
// SDCH_DECODE or SDCH_PASSTHROUGH. Hence we need to record packet
// arrival times.
packet_timing_enabled_ = true;
}
}
}
if (http_user_agent_settings_) {
// Only add default Accept-Language if the request didn't have it
// specified.
std::string accept_language =
http_user_agent_settings_->GetAcceptLanguage();
if (!accept_language.empty()) {
request_info_.extra_headers.SetHeaderIfMissing(
HttpRequestHeaders::kAcceptLanguage,
accept_language);
}
}
}
void URLRequestHttpJob::AddCookieHeaderAndStart() {
// No matter what, we want to report our status as IO pending since we will
// be notifying our consumer asynchronously via OnStartCompleted.
SetStatus(URLRequestStatus(URLRequestStatus::IO_PENDING, 0));
// If the request was destroyed, then there is no more work to do.
if (!request_)
return;
CookieStore* cookie_store = request_->context()->cookie_store();
if (cookie_store && !(request_info_.load_flags & LOAD_DO_NOT_SEND_COOKIES)) {
cookie_store->GetAllCookiesForURLAsync(
request_->url(),
base::Bind(&URLRequestHttpJob::CheckCookiePolicyAndLoad,
weak_factory_.GetWeakPtr()));
} else {
DoStartTransaction();
}
}
void URLRequestHttpJob::DoLoadCookies() {
CookieOptions options;
options.set_include_httponly();
// TODO(mkwst): Drop this `if` once we decide whether or not to ship
// first-party cookies: https://crbug.com/459154
if (network_delegate() &&
network_delegate()->FirstPartyOnlyCookieExperimentEnabled())
options.set_first_party_url(request_->first_party_for_cookies());
else
options.set_include_first_party_only();
request_->context()->cookie_store()->GetCookiesWithOptionsAsync(
request_->url(), options, base::Bind(&URLRequestHttpJob::OnCookiesLoaded,
weak_factory_.GetWeakPtr()));
}
void URLRequestHttpJob::CheckCookiePolicyAndLoad(
const CookieList& cookie_list) {
if (CanGetCookies(cookie_list))
DoLoadCookies();
else
DoStartTransaction();
}
void URLRequestHttpJob::OnCookiesLoaded(const std::string& cookie_line) {
if (!cookie_line.empty()) {
request_info_.extra_headers.SetHeader(
HttpRequestHeaders::kCookie, cookie_line);
// Disable privacy mode as we are sending cookies anyway.
request_info_.privacy_mode = PRIVACY_MODE_DISABLED;
}
DoStartTransaction();
}
void URLRequestHttpJob::DoStartTransaction() {
// We may have been canceled while retrieving cookies.
if (GetStatus().is_success()) {
StartTransaction();
} else {
NotifyCanceled();
}
}
void URLRequestHttpJob::SaveCookiesAndNotifyHeadersComplete(int result) {
// End of the call started in OnStartCompleted.
OnCallToDelegateComplete();
if (result != OK) {
std::string source("delegate");
request_->net_log().AddEvent(NetLog::TYPE_CANCELLED,
NetLog::StringCallback("source", &source));
NotifyStartError(URLRequestStatus(URLRequestStatus::FAILED, result));
return;
}
DCHECK(transaction_.get());
const HttpResponseInfo* response_info = transaction_->GetResponseInfo();
DCHECK(response_info);
response_cookies_.clear();
response_cookies_save_index_ = 0;
FetchResponseCookies(&response_cookies_);
if (!GetResponseHeaders()->GetDateValue(&response_date_))
response_date_ = base::Time();
// Now, loop over the response cookies, and attempt to persist each.
SaveNextCookie();
}
// If the save occurs synchronously, SaveNextCookie will loop and save the next
// cookie. If the save is deferred, the callback is responsible for continuing
// to iterate through the cookies.
// TODO(erikwright): Modify the CookieStore API to indicate via return value
// whether it completed synchronously or asynchronously.
// See http://crbug.com/131066.
void URLRequestHttpJob::SaveNextCookie() {
// No matter what, we want to report our status as IO pending since we will
// be notifying our consumer asynchronously via OnStartCompleted.
SetStatus(URLRequestStatus(URLRequestStatus::IO_PENDING, 0));
// Used to communicate with the callback. See the implementation of
// OnCookieSaved.
scoped_refptr<SharedBoolean> callback_pending = new SharedBoolean(false);
scoped_refptr<SharedBoolean> save_next_cookie_running =
new SharedBoolean(true);
if (!(request_info_.load_flags & LOAD_DO_NOT_SAVE_COOKIES) &&
request_->context()->cookie_store() && response_cookies_.size() > 0) {
CookieOptions options;
options.set_include_httponly();
options.set_server_time(response_date_);
CookieStore::SetCookiesCallback callback(base::Bind(
&URLRequestHttpJob::OnCookieSaved, weak_factory_.GetWeakPtr(),
save_next_cookie_running, callback_pending));
// Loop through the cookies as long as SetCookieWithOptionsAsync completes
// synchronously.
while (!callback_pending->data &&
response_cookies_save_index_ < response_cookies_.size()) {
if (CanSetCookie(
response_cookies_[response_cookies_save_index_], &options)) {
callback_pending->data = true;
request_->context()->cookie_store()->SetCookieWithOptionsAsync(
request_->url(), response_cookies_[response_cookies_save_index_],
options, callback);
}
++response_cookies_save_index_;
}
}
save_next_cookie_running->data = false;
if (!callback_pending->data) {
response_cookies_.clear();
response_cookies_save_index_ = 0;
SetStatus(URLRequestStatus()); // Clear the IO_PENDING status
NotifyHeadersComplete();
return;
}
}
// |save_next_cookie_running| is true when the callback is bound and set to
// false when SaveNextCookie exits, allowing the callback to determine if the
// save occurred synchronously or asynchronously.
// |callback_pending| is false when the callback is invoked and will be set to
// true by the callback, allowing SaveNextCookie to detect whether the save
// occurred synchronously.
// See SaveNextCookie() for more information.
void URLRequestHttpJob::OnCookieSaved(
scoped_refptr<SharedBoolean> save_next_cookie_running,
scoped_refptr<SharedBoolean> callback_pending,
bool cookie_status) {
callback_pending->data = false;
// If we were called synchronously, return.
if (save_next_cookie_running->data) {
return;
}
// We were called asynchronously, so trigger the next save.
// We may have been canceled within OnSetCookie.
if (GetStatus().is_success()) {
SaveNextCookie();
} else {
NotifyCanceled();
}
}
void URLRequestHttpJob::FetchResponseCookies(
std::vector<std::string>* cookies) {
const std::string name = "Set-Cookie";
std::string value;
void* iter = NULL;
HttpResponseHeaders* headers = GetResponseHeaders();
while (headers->EnumerateHeader(&iter, name, &value)) {
if (!value.empty())
cookies->push_back(value);
}
}
void URLRequestHttpJob::ProcessBackoffHeader() {
DCHECK(response_info_);
if (!backoff_manager_)
return;
TransportSecurityState* security_state =
request_->context()->transport_security_state();
const SSLInfo& ssl_info = response_info_->ssl_info;
// Only accept Backoff headers on HTTPS connections that have no
// certificate errors.
if (!ssl_info.is_valid() || IsCertStatusError(ssl_info.cert_status) ||
!security_state)
return;
backoff_manager_->UpdateWithResponse(request()->url(), GetResponseHeaders(),
base::Time::Now());
}
// NOTE: |ProcessStrictTransportSecurityHeader| and
// |ProcessPublicKeyPinsHeader| have very similar structures, by design.
void URLRequestHttpJob::ProcessStrictTransportSecurityHeader() {
DCHECK(response_info_);
TransportSecurityState* security_state =
request_->context()->transport_security_state();
const SSLInfo& ssl_info = response_info_->ssl_info;
// Only accept HSTS headers on HTTPS connections that have no
// certificate errors.
if (!ssl_info.is_valid() || IsCertStatusError(ssl_info.cert_status) ||
!security_state)
return;
// Don't accept HSTS headers when the hostname is an IP address.
if (request_info_.url.HostIsIPAddress())
return;
// http://tools.ietf.org/html/draft-ietf-websec-strict-transport-sec:
//
// If a UA receives more than one STS header field in a HTTP response
// message over secure transport, then the UA MUST process only the
// first such header field.
HttpResponseHeaders* headers = GetResponseHeaders();
std::string value;
if (headers->EnumerateHeader(NULL, "Strict-Transport-Security", &value))
security_state->AddHSTSHeader(request_info_.url.host(), value);
}
void URLRequestHttpJob::ProcessPublicKeyPinsHeader() {
DCHECK(response_info_);
TransportSecurityState* security_state =
request_->context()->transport_security_state();
const SSLInfo& ssl_info = response_info_->ssl_info;
// Only accept HPKP headers on HTTPS connections that have no
// certificate errors.
if (!ssl_info.is_valid() || IsCertStatusError(ssl_info.cert_status) ||
!security_state)
return;
// Don't accept HSTS headers when the hostname is an IP address.
if (request_info_.url.HostIsIPAddress())
return;
// http://tools.ietf.org/html/draft-ietf-websec-key-pinning:
//
// If a UA receives more than one PKP header field in an HTTP
// response message over secure transport, then the UA MUST process
// only the first such header field.
HttpResponseHeaders* headers = GetResponseHeaders();
std::string value;
if (headers->EnumerateHeader(NULL, "Public-Key-Pins", &value))
security_state->AddHPKPHeader(request_info_.url.host(), value, ssl_info);
}
void URLRequestHttpJob::OnStartCompleted(int result) {
RecordTimer();
// If the request was destroyed, then there is no more work to do.
if (!request_)
return;
// If the job is done (due to cancellation), can just ignore this
// notification.
if (done_)
return;
receive_headers_end_ = base::TimeTicks::Now();
// Clear the IO_PENDING status
SetStatus(URLRequestStatus());
const URLRequestContext* context = request_->context();
if (result == ERR_SSL_PINNED_KEY_NOT_IN_CERT_CHAIN &&
transaction_->GetResponseInfo() != NULL) {
FraudulentCertificateReporter* reporter =
context->fraudulent_certificate_reporter();
if (reporter != NULL) {
const SSLInfo& ssl_info = transaction_->GetResponseInfo()->ssl_info;
const std::string& host = request_->url().host();
reporter->SendReport(host, ssl_info);
}
}
if (result == OK) {
if (transaction_ && transaction_->GetResponseInfo()) {
SetProxyServer(transaction_->GetResponseInfo()->proxy_server);
}
scoped_refptr<HttpResponseHeaders> headers = GetResponseHeaders();
if (network_delegate()) {
// Note that |this| may not be deleted until
// |on_headers_received_callback_| or
// |NetworkDelegate::URLRequestDestroyed()| has been called.
OnCallToDelegate();
allowed_unsafe_redirect_url_ = GURL();
int error = network_delegate()->NotifyHeadersReceived(
request_,
on_headers_received_callback_,
headers.get(),
&override_response_headers_,
&allowed_unsafe_redirect_url_);
if (error != OK) {
if (error == ERR_IO_PENDING) {
awaiting_callback_ = true;
} else {
std::string source("delegate");
request_->net_log().AddEvent(NetLog::TYPE_CANCELLED,
NetLog::StringCallback("source",
&source));
OnCallToDelegateComplete();
NotifyStartError(URLRequestStatus(URLRequestStatus::FAILED, error));
}
return;
}
}
SaveCookiesAndNotifyHeadersComplete(OK);
} else if (IsCertificateError(result)) {
// We encountered an SSL certificate error.
if (result == ERR_SSL_WEAK_SERVER_EPHEMERAL_DH_KEY ||
result == ERR_SSL_PINNED_KEY_NOT_IN_CERT_CHAIN) {
// These are hard failures. They're handled separately and don't have
// the correct cert status, so set it here.
SSLInfo info(transaction_->GetResponseInfo()->ssl_info);
info.cert_status = MapNetErrorToCertStatus(result);
NotifySSLCertificateError(info, true);
} else {
// Maybe overridable, maybe not. Ask the delegate to decide.
TransportSecurityState* state = context->transport_security_state();
const bool fatal =
state && state->ShouldSSLErrorsBeFatal(request_info_.url.host());
NotifySSLCertificateError(
transaction_->GetResponseInfo()->ssl_info, fatal);
}
} else if (result == ERR_SSL_CLIENT_AUTH_CERT_NEEDED) {
NotifyCertificateRequested(
transaction_->GetResponseInfo()->cert_request_info.get());
} else {
// Even on an error, there may be useful information in the response
// info (e.g. whether there's a cached copy).
if (transaction_.get())
response_info_ = transaction_->GetResponseInfo();
NotifyStartError(URLRequestStatus(URLRequestStatus::FAILED, result));
}
}
void URLRequestHttpJob::OnHeadersReceivedCallback(int result) {
awaiting_callback_ = false;
// Check that there are no callbacks to already canceled requests.
DCHECK_NE(URLRequestStatus::CANCELED, GetStatus().status());
SaveCookiesAndNotifyHeadersComplete(result);
}
void URLRequestHttpJob::OnReadCompleted(int result) {
read_in_progress_ = false;