blob: 526e9e7d7c466c2c7b95136c6e89f9fa7b2ff3dd [file] [log] [blame]
// 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/http/http_network_transaction.h"
#include <set>
#include <utility>
#include <vector>
#include "base/base64url.h"
#include "base/bind.h"
#include "base/bind_helpers.h"
#include "base/callback_helpers.h"
#include "base/compiler_specific.h"
#include "base/format_macros.h"
#include "base/metrics/field_trial.h"
#include "base/metrics/histogram_functions.h"
#include "base/metrics/histogram_macros.h"
#include "base/metrics/sparse_histogram.h"
#include "base/stl_util.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_util.h"
#include "base/time/time.h"
#include "base/values.h"
#include "build/build_config.h"
#include "net/base/auth.h"
#include "net/base/host_port_pair.h"
#include "net/base/io_buffer.h"
#include "net/base/load_flags.h"
#include "net/base/load_timing_info.h"
#include "net/base/net_errors.h"
#include "net/base/proxy_server.h"
#include "net/base/upload_data_stream.h"
#include "net/base/url_util.h"
#include "net/cert/cert_status_flags.h"
#include "net/filter/filter_source_stream.h"
#include "net/http/bidirectional_stream_impl.h"
#include "net/http/http_auth.h"
#include "net/http/http_auth_handler.h"
#include "net/http/http_auth_handler_factory.h"
#include "net/http/http_basic_stream.h"
#include "net/http/http_chunked_decoder.h"
#include "net/http/http_network_session.h"
#include "net/http/http_proxy_client_socket.h"
#include "net/http/http_proxy_client_socket_pool.h"
#include "net/http/http_request_headers.h"
#include "net/http/http_request_info.h"
#include "net/http/http_response_headers.h"
#include "net/http/http_response_info.h"
#include "net/http/http_server_properties.h"
#include "net/http/http_status_code.h"
#include "net/http/http_stream.h"
#include "net/http/http_stream_factory.h"
#include "net/http/http_util.h"
#include "net/http/transport_security_state.h"
#include "net/http/url_security_manager.h"
#include "net/log/net_log_event_type.h"
#include "net/socket/client_socket_factory.h"
#include "net/socket/next_proto.h"
#include "net/socket/socks_client_socket_pool.h"
#include "net/socket/transport_client_socket_pool.h"
#include "net/spdy/spdy_http_stream.h"
#include "net/spdy/spdy_session.h"
#include "net/spdy/spdy_session_pool.h"
#include "net/ssl/ssl_cert_request_info.h"
#include "net/ssl/ssl_connection_status_flags.h"
#include "net/ssl/ssl_info.h"
#include "net/ssl/ssl_private_key.h"
#include "net/ssl/token_binding.h"
#include "url/gurl.h"
#include "url/url_canon.h"
namespace {
// Max number of |retry_attempts| (excluding the initial request) after which
// we give up and show an error page.
const size_t kMaxRetryAttempts = 2;
// Max number of calls to RestartWith* allowed for a single connection. A single
// HttpNetworkTransaction should not signal very many restartable errors, but it
// may occur due to a bug (e.g. https://crbug.com/823387 or
// https://crbug.com/488043) or simply if the server or proxy requests
// authentication repeatedly. Although these calls are often associated with a
// user prompt, in other scenarios (remembered preferences, extensions,
// multi-leg authentication), they may be triggered automatically. To avoid
// looping forever, bound the number of restarts.
const size_t kMaxRestarts = 32;
} // namespace
namespace net {
HttpNetworkTransaction::HttpNetworkTransaction(RequestPriority priority,
HttpNetworkSession* session)
: pending_auth_target_(HttpAuth::AUTH_NONE),
io_callback_(base::BindRepeating(&HttpNetworkTransaction::OnIOComplete,
base::Unretained(this))),
session_(session),
request_(NULL),
priority_(priority),
headers_valid_(false),
can_send_early_data_(false),
server_ssl_client_cert_was_cached_(false),
request_headers_(),
read_buf_len_(0),
total_received_bytes_(0),
total_sent_bytes_(0),
next_state_(STATE_NONE),
establishing_tunnel_(false),
enable_ip_based_pooling_(true),
enable_alternative_services_(true),
websocket_handshake_stream_base_create_helper_(NULL),
net_error_details_(),
retry_attempts_(0),
num_restarts_(0),
ssl_version_interference_error_(OK) {}
HttpNetworkTransaction::~HttpNetworkTransaction() {
if (stream_.get()) {
// TODO(mbelshe): The stream_ should be able to compute whether or not the
// stream should be kept alive. No reason to compute here
// and pass it in.
if (!stream_->CanReuseConnection() || next_state_ != STATE_NONE) {
stream_->Close(true /* not reusable */);
} else if (stream_->IsResponseBodyComplete()) {
// If the response body is complete, we can just reuse the socket.
stream_->Close(false /* reusable */);
} else {
// Otherwise, we try to drain the response body.
HttpStream* stream = stream_.release();
stream->Drain(session_);
}
}
if (request_ && request_->upload_data_stream)
request_->upload_data_stream->Reset(); // Invalidate pending callbacks.
}
int HttpNetworkTransaction::Start(const HttpRequestInfo* request_info,
CompletionOnceCallback callback,
const NetLogWithSource& net_log) {
DCHECK(request_info->traffic_annotation.is_valid());
net_log_ = net_log;
request_ = request_info;
url_ = request_->url;
// Now that we have an HttpRequestInfo object, update server_ssl_config_.
session_->GetSSLConfig(*request_, &server_ssl_config_, &proxy_ssl_config_);
if (request_->load_flags & LOAD_DISABLE_CERT_REVOCATION_CHECKING) {
server_ssl_config_.rev_checking_enabled = false;
proxy_ssl_config_.rev_checking_enabled = false;
}
if (HttpUtil::IsMethodSafe(request_info->method)) {
can_send_early_data_ = true;
}
if (request_->load_flags & LOAD_PREFETCH)
response_.unused_since_prefetch = true;
next_state_ = STATE_NOTIFY_BEFORE_CREATE_STREAM;
int rv = DoLoop(OK);
if (rv == ERR_IO_PENDING)
callback_ = std::move(callback);
return rv;
}
int HttpNetworkTransaction::RestartIgnoringLastError(
CompletionOnceCallback callback) {
DCHECK(!stream_.get());
DCHECK(!stream_request_.get());
DCHECK_EQ(STATE_NONE, next_state_);
if (!CheckMaxRestarts())
return ERR_TOO_MANY_RETRIES;
next_state_ = STATE_CREATE_STREAM;
int rv = DoLoop(OK);
if (rv == ERR_IO_PENDING)
callback_ = std::move(callback);
return rv;
}
int HttpNetworkTransaction::RestartWithCertificate(
scoped_refptr<X509Certificate> client_cert,
scoped_refptr<SSLPrivateKey> client_private_key,
CompletionOnceCallback callback) {
// In HandleCertificateRequest(), we always tear down existing stream
// requests to force a new connection. So we shouldn't have one here.
DCHECK(!stream_request_.get());
DCHECK(!stream_.get());
DCHECK_EQ(STATE_NONE, next_state_);
if (!CheckMaxRestarts())
return ERR_TOO_MANY_RETRIES;
SSLConfig* ssl_config = response_.cert_request_info->is_proxy ?
&proxy_ssl_config_ : &server_ssl_config_;
ssl_config->send_client_cert = true;
ssl_config->client_cert = client_cert;
ssl_config->client_private_key = client_private_key;
session_->ssl_client_auth_cache()->Add(
response_.cert_request_info->host_and_port, std::move(client_cert),
std::move(client_private_key));
// Reset the other member variables.
// Note: this is necessary only with SSL renegotiation.
ResetStateForRestart();
next_state_ = STATE_CREATE_STREAM;
int rv = DoLoop(OK);
if (rv == ERR_IO_PENDING)
callback_ = std::move(callback);
return rv;
}
int HttpNetworkTransaction::RestartWithAuth(const AuthCredentials& credentials,
CompletionOnceCallback callback) {
if (!CheckMaxRestarts())
return ERR_TOO_MANY_RETRIES;
HttpAuth::Target target = pending_auth_target_;
if (target == HttpAuth::AUTH_NONE) {
NOTREACHED();
return ERR_UNEXPECTED;
}
pending_auth_target_ = HttpAuth::AUTH_NONE;
auth_controllers_[target]->ResetAuth(credentials);
DCHECK(callback_.is_null());
int rv = OK;
if (target == HttpAuth::AUTH_PROXY && establishing_tunnel_) {
// In this case, we've gathered credentials for use with proxy
// authentication of a tunnel.
DCHECK_EQ(STATE_CREATE_STREAM_COMPLETE, next_state_);
DCHECK(stream_request_ != NULL);
auth_controllers_[target] = NULL;
ResetStateForRestart();
rv = stream_request_->RestartTunnelWithProxyAuth();
} else {
// In this case, we've gathered credentials for the server or the proxy
// but it is not during the tunneling phase.
DCHECK(stream_request_ == NULL);
PrepareForAuthRestart(target);
rv = DoLoop(OK);
}
if (rv == ERR_IO_PENDING)
callback_ = std::move(callback);
return rv;
}
void HttpNetworkTransaction::PrepareForAuthRestart(HttpAuth::Target target) {
DCHECK(HaveAuth(target));
DCHECK(!stream_request_.get());
// Authorization schemes incompatible with HTTP/2 are unsupported for proxies.
if (target == HttpAuth::AUTH_SERVER &&
auth_controllers_[target]->NeedsHTTP11()) {
session_->http_server_properties()->SetHTTP11Required(
HostPortPair::FromURL(request_->url));
}
bool keep_alive = false;
// Even if the server says the connection is keep-alive, we have to be
// able to find the end of each response in order to reuse the connection.
if (stream_->CanReuseConnection()) {
// If the response body hasn't been completely read, we need to drain
// it first.
if (!stream_->IsResponseBodyComplete()) {
next_state_ = STATE_DRAIN_BODY_FOR_AUTH_RESTART;
read_buf_ = new IOBuffer(kDrainBodyBufferSize); // A bit bucket.
read_buf_len_ = kDrainBodyBufferSize;
return;
}
keep_alive = true;
}
// We don't need to drain the response body, so we act as if we had drained
// the response body.
DidDrainBodyForAuthRestart(keep_alive);
}
void HttpNetworkTransaction::DidDrainBodyForAuthRestart(bool keep_alive) {
DCHECK(!stream_request_.get());
if (stream_.get()) {
total_received_bytes_ += stream_->GetTotalReceivedBytes();
total_sent_bytes_ += stream_->GetTotalSentBytes();
HttpStream* new_stream = NULL;
if (keep_alive && stream_->CanReuseConnection()) {
// We should call connection_->set_idle_time(), but this doesn't occur
// often enough to be worth the trouble.
stream_->SetConnectionReused();
new_stream = stream_->RenewStreamForAuth();
}
if (!new_stream) {
// Close the stream and mark it as not_reusable. Even in the
// keep_alive case, we've determined that the stream_ is not
// reusable if new_stream is NULL.
stream_->Close(true);
next_state_ = STATE_CREATE_STREAM;
} else {
// Renewed streams shouldn't carry over sent or received bytes.
DCHECK_EQ(0, new_stream->GetTotalReceivedBytes());
DCHECK_EQ(0, new_stream->GetTotalSentBytes());
next_state_ = STATE_INIT_STREAM;
}
stream_.reset(new_stream);
}
// Reset the other member variables.
ResetStateForAuthRestart();
}
bool HttpNetworkTransaction::IsReadyToRestartForAuth() {
return pending_auth_target_ != HttpAuth::AUTH_NONE &&
HaveAuth(pending_auth_target_);
}
int HttpNetworkTransaction::Read(IOBuffer* buf,
int buf_len,
CompletionOnceCallback callback) {
DCHECK(buf);
DCHECK_LT(0, buf_len);
scoped_refptr<HttpResponseHeaders> headers(GetResponseHeaders());
if (headers_valid_ && headers.get() && stream_request_.get()) {
// We're trying to read the body of the response but we're still trying
// to establish an SSL tunnel through an HTTP proxy. We can't read these
// bytes when establishing a tunnel because they might be controlled by
// an active network attacker. We don't worry about this for HTTP
// because an active network attacker can already control HTTP sessions.
// We reach this case when the user cancels a 407 proxy auth prompt. We
// also don't worry about this for an HTTPS Proxy, because the
// communication with the proxy is secure.
// See http://crbug.com/8473.
DCHECK(proxy_info_.is_http() || proxy_info_.is_https() ||
proxy_info_.is_quic());
DCHECK_EQ(headers->response_code(), HTTP_PROXY_AUTHENTICATION_REQUIRED);
LOG(WARNING) << "Blocked proxy response with status "
<< headers->response_code() << " to CONNECT request for "
<< GetHostAndPort(url_) << ".";
return ERR_TUNNEL_CONNECTION_FAILED;
}
// Are we using SPDY or HTTP?
next_state_ = STATE_READ_BODY;
read_buf_ = buf;
read_buf_len_ = buf_len;
int rv = DoLoop(OK);
if (rv == ERR_IO_PENDING)
callback_ = std::move(callback);
return rv;
}
void HttpNetworkTransaction::StopCaching() {}
bool HttpNetworkTransaction::GetFullRequestHeaders(
HttpRequestHeaders* headers) const {
// TODO(juliatuttle): Make sure we've populated request_headers_.
*headers = request_headers_;
return true;
}
int64_t HttpNetworkTransaction::GetTotalReceivedBytes() const {
int64_t total_received_bytes = total_received_bytes_;
if (stream_)
total_received_bytes += stream_->GetTotalReceivedBytes();
return total_received_bytes;
}
int64_t HttpNetworkTransaction::GetTotalSentBytes() const {
int64_t total_sent_bytes = total_sent_bytes_;
if (stream_)
total_sent_bytes += stream_->GetTotalSentBytes();
return total_sent_bytes;
}
void HttpNetworkTransaction::DoneReading() {}
const HttpResponseInfo* HttpNetworkTransaction::GetResponseInfo() const {
return &response_;
}
LoadState HttpNetworkTransaction::GetLoadState() const {
// TODO(wtc): Define a new LoadState value for the
// STATE_INIT_CONNECTION_COMPLETE state, which delays the HTTP request.
switch (next_state_) {
case STATE_CREATE_STREAM:
return LOAD_STATE_WAITING_FOR_DELEGATE;
case STATE_CREATE_STREAM_COMPLETE:
return stream_request_->GetLoadState();
case STATE_GENERATE_PROXY_AUTH_TOKEN_COMPLETE:
case STATE_GENERATE_SERVER_AUTH_TOKEN_COMPLETE:
case STATE_SEND_REQUEST_COMPLETE:
return LOAD_STATE_SENDING_REQUEST;
case STATE_READ_HEADERS_COMPLETE:
return LOAD_STATE_WAITING_FOR_RESPONSE;
case STATE_READ_BODY_COMPLETE:
return LOAD_STATE_READING_RESPONSE;
default:
return LOAD_STATE_IDLE;
}
}
void HttpNetworkTransaction::SetQuicServerInfo(
QuicServerInfo* quic_server_info) {}
bool HttpNetworkTransaction::GetLoadTimingInfo(
LoadTimingInfo* load_timing_info) const {
if (!stream_ || !stream_->GetLoadTimingInfo(load_timing_info))
return false;
load_timing_info->proxy_resolve_start =
proxy_info_.proxy_resolve_start_time();
load_timing_info->proxy_resolve_end = proxy_info_.proxy_resolve_end_time();
load_timing_info->send_start = send_start_time_;
load_timing_info->send_end = send_end_time_;
return true;
}
bool HttpNetworkTransaction::GetRemoteEndpoint(IPEndPoint* endpoint) const {
if (remote_endpoint_.address().empty())
return false;
*endpoint = remote_endpoint_;
return true;
}
void HttpNetworkTransaction::PopulateNetErrorDetails(
NetErrorDetails* details) const {
*details = net_error_details_;
if (stream_)
stream_->PopulateNetErrorDetails(details);
}
void HttpNetworkTransaction::SetPriority(RequestPriority priority) {
priority_ = priority;
if (stream_request_)
stream_request_->SetPriority(priority);
if (stream_)
stream_->SetPriority(priority);
// The above call may have resulted in deleting |*this|.
}
void HttpNetworkTransaction::SetWebSocketHandshakeStreamCreateHelper(
WebSocketHandshakeStreamBase::CreateHelper* create_helper) {
websocket_handshake_stream_base_create_helper_ = create_helper;
}
void HttpNetworkTransaction::SetBeforeNetworkStartCallback(
const BeforeNetworkStartCallback& callback) {
before_network_start_callback_ = callback;
}
void HttpNetworkTransaction::SetBeforeHeadersSentCallback(
const BeforeHeadersSentCallback& callback) {
before_headers_sent_callback_ = callback;
}
void HttpNetworkTransaction::SetRequestHeadersCallback(
RequestHeadersCallback callback) {
DCHECK(!stream_);
request_headers_callback_ = std::move(callback);
}
void HttpNetworkTransaction::SetResponseHeadersCallback(
ResponseHeadersCallback callback) {
DCHECK(!stream_);
response_headers_callback_ = std::move(callback);
}
int HttpNetworkTransaction::ResumeNetworkStart() {
DCHECK_EQ(next_state_, STATE_CREATE_STREAM);
return DoLoop(OK);
}
void HttpNetworkTransaction::OnStreamReady(const SSLConfig& used_ssl_config,
const ProxyInfo& used_proxy_info,
std::unique_ptr<HttpStream> stream) {
DCHECK_EQ(STATE_CREATE_STREAM_COMPLETE, next_state_);
DCHECK(stream_request_.get());
if (stream_) {
total_received_bytes_ += stream_->GetTotalReceivedBytes();
total_sent_bytes_ += stream_->GetTotalSentBytes();
}
stream_ = std::move(stream);
stream_->SetRequestHeadersCallback(request_headers_callback_);
server_ssl_config_ = used_ssl_config;
proxy_info_ = used_proxy_info;
response_.was_alpn_negotiated = stream_request_->was_alpn_negotiated();
response_.alpn_negotiated_protocol =
NextProtoToString(stream_request_->negotiated_protocol());
response_.was_fetched_via_spdy = stream_request_->using_spdy();
response_.was_fetched_via_proxy = !proxy_info_.is_direct();
if (response_.was_fetched_via_proxy && !proxy_info_.is_empty())
response_.proxy_server = proxy_info_.proxy_server();
else if (!response_.was_fetched_via_proxy && proxy_info_.is_direct())
response_.proxy_server = ProxyServer::Direct();
else
response_.proxy_server = ProxyServer();
OnIOComplete(OK);
}
void HttpNetworkTransaction::OnBidirectionalStreamImplReady(
const SSLConfig& used_ssl_config,
const ProxyInfo& used_proxy_info,
std::unique_ptr<BidirectionalStreamImpl> stream) {
NOTREACHED();
}
void HttpNetworkTransaction::OnWebSocketHandshakeStreamReady(
const SSLConfig& used_ssl_config,
const ProxyInfo& used_proxy_info,
std::unique_ptr<WebSocketHandshakeStreamBase> stream) {
OnStreamReady(used_ssl_config, used_proxy_info, std::move(stream));
}
void HttpNetworkTransaction::OnStreamFailed(
int result,
const NetErrorDetails& net_error_details,
const SSLConfig& used_ssl_config) {
DCHECK_EQ(STATE_CREATE_STREAM_COMPLETE, next_state_);
DCHECK_NE(OK, result);
DCHECK(stream_request_.get());
DCHECK(!stream_.get());
server_ssl_config_ = used_ssl_config;
net_error_details_ = net_error_details;
OnIOComplete(result);
}
void HttpNetworkTransaction::OnCertificateError(
int result,
const SSLConfig& used_ssl_config,
const SSLInfo& ssl_info) {
DCHECK_EQ(STATE_CREATE_STREAM_COMPLETE, next_state_);
DCHECK_NE(OK, result);
DCHECK(stream_request_.get());
DCHECK(!stream_.get());
response_.ssl_info = ssl_info;
server_ssl_config_ = used_ssl_config;
// TODO(mbelshe): For now, we're going to pass the error through, and that
// will close the stream_request in all cases. This means that we're always
// going to restart an entire STATE_CREATE_STREAM, even if the connection is
// good and the user chooses to ignore the error. This is not ideal, but not
// the end of the world either.
OnIOComplete(result);
}
void HttpNetworkTransaction::OnNeedsProxyAuth(
const HttpResponseInfo& proxy_response,
const SSLConfig& used_ssl_config,
const ProxyInfo& used_proxy_info,
HttpAuthController* auth_controller) {
DCHECK(stream_request_.get());
DCHECK_EQ(STATE_CREATE_STREAM_COMPLETE, next_state_);
establishing_tunnel_ = true;
response_.headers = proxy_response.headers;
response_.auth_challenge = proxy_response.auth_challenge;
if (response_.headers.get() && !ContentEncodingsValid()) {
DoCallback(ERR_CONTENT_DECODING_FAILED);
return;
}
headers_valid_ = true;
server_ssl_config_ = used_ssl_config;
proxy_info_ = used_proxy_info;
auth_controllers_[HttpAuth::AUTH_PROXY] = auth_controller;
pending_auth_target_ = HttpAuth::AUTH_PROXY;
DoCallback(OK);
}
void HttpNetworkTransaction::OnNeedsClientAuth(
const SSLConfig& used_ssl_config,
SSLCertRequestInfo* cert_info) {
DCHECK_EQ(STATE_CREATE_STREAM_COMPLETE, next_state_);
server_ssl_config_ = used_ssl_config;
response_.cert_request_info = cert_info;
OnIOComplete(ERR_SSL_CLIENT_AUTH_CERT_NEEDED);
}
void HttpNetworkTransaction::OnHttpsProxyTunnelResponse(
const HttpResponseInfo& response_info,
const SSLConfig& used_ssl_config,
const ProxyInfo& used_proxy_info,
std::unique_ptr<HttpStream> stream) {
DCHECK_EQ(STATE_CREATE_STREAM_COMPLETE, next_state_);
CopyConnectionAttemptsFromStreamRequest();
headers_valid_ = true;
response_ = response_info;
server_ssl_config_ = used_ssl_config;
proxy_info_ = used_proxy_info;
if (stream_) {
total_received_bytes_ += stream_->GetTotalReceivedBytes();
total_sent_bytes_ += stream_->GetTotalSentBytes();
}
stream_ = std::move(stream);
stream_->SetRequestHeadersCallback(request_headers_callback_);
stream_request_.reset(); // we're done with the stream request
OnIOComplete(ERR_HTTPS_PROXY_TUNNEL_RESPONSE);
}
void HttpNetworkTransaction::OnQuicBroken() {
net_error_details_.quic_broken = true;
}
void HttpNetworkTransaction::GetConnectionAttempts(
ConnectionAttempts* out) const {
*out = connection_attempts_;
}
bool HttpNetworkTransaction::IsSecureRequest() const {
return request_->url.SchemeIsCryptographic();
}
bool HttpNetworkTransaction::IsTokenBindingEnabled() const {
if (!IsSecureRequest())
return false;
SSLInfo ssl_info;
stream_->GetSSLInfo(&ssl_info);
return ssl_info.token_binding_negotiated &&
ssl_info.token_binding_key_param == TB_PARAM_ECDSAP256 &&
session_->context().channel_id_service;
}
void HttpNetworkTransaction::RecordTokenBindingSupport() const {
// This enum is used for an UMA histogram - do not change or re-use values.
enum {
DISABLED = 0,
CLIENT_ONLY = 1,
CLIENT_AND_SERVER = 2,
CLIENT_NO_CHANNEL_ID_SERVICE = 3,
TOKEN_BINDING_SUPPORT_MAX
} supported;
if (!IsSecureRequest())
return;
SSLInfo ssl_info;
stream_->GetSSLInfo(&ssl_info);
if (!session_->params().enable_token_binding) {
supported = DISABLED;
} else if (!session_->context().channel_id_service) {
supported = CLIENT_NO_CHANNEL_ID_SERVICE;
} else if (ssl_info.token_binding_negotiated) {
supported = CLIENT_AND_SERVER;
} else {
supported = CLIENT_ONLY;
}
UMA_HISTOGRAM_ENUMERATION("Net.TokenBinding.Support", supported,
TOKEN_BINDING_SUPPORT_MAX);
}
bool HttpNetworkTransaction::UsingHttpProxyWithoutTunnel() const {
return (proxy_info_.is_http() || proxy_info_.is_https() ||
proxy_info_.is_quic()) &&
!(request_->url.SchemeIs("https") || request_->url.SchemeIsWSOrWSS());
}
void HttpNetworkTransaction::DoCallback(int rv) {
DCHECK_NE(rv, ERR_IO_PENDING);
DCHECK(!callback_.is_null());
// Since Run may result in Read being called, clear user_callback_ up front.
base::ResetAndReturn(&callback_).Run(rv);
}
void HttpNetworkTransaction::OnIOComplete(int result) {
int rv = DoLoop(result);
if (rv != ERR_IO_PENDING)
DoCallback(rv);
}
int HttpNetworkTransaction::DoLoop(int result) {
DCHECK(next_state_ != STATE_NONE);
int rv = result;
do {
State state = next_state_;
next_state_ = STATE_NONE;
switch (state) {
case STATE_NOTIFY_BEFORE_CREATE_STREAM:
DCHECK_EQ(OK, rv);
rv = DoNotifyBeforeCreateStream();
break;
case STATE_CREATE_STREAM:
DCHECK_EQ(OK, rv);
rv = DoCreateStream();
break;
case STATE_CREATE_STREAM_COMPLETE:
// TODO(zhongyi): remove liveness checks when crbug.com/652868 is
// solved.
net_log_.CrashIfInvalid();
rv = DoCreateStreamComplete(rv);
net_log_.CrashIfInvalid();
break;
case STATE_INIT_STREAM:
DCHECK_EQ(OK, rv);
rv = DoInitStream();
break;
case STATE_INIT_STREAM_COMPLETE:
rv = DoInitStreamComplete(rv);
break;
case STATE_GENERATE_PROXY_AUTH_TOKEN:
DCHECK_EQ(OK, rv);
rv = DoGenerateProxyAuthToken();
break;
case STATE_GENERATE_PROXY_AUTH_TOKEN_COMPLETE:
rv = DoGenerateProxyAuthTokenComplete(rv);
break;
case STATE_GENERATE_SERVER_AUTH_TOKEN:
DCHECK_EQ(OK, rv);
rv = DoGenerateServerAuthToken();
break;
case STATE_GENERATE_SERVER_AUTH_TOKEN_COMPLETE:
rv = DoGenerateServerAuthTokenComplete(rv);
break;
case STATE_GET_PROVIDED_TOKEN_BINDING_KEY:
DCHECK_EQ(OK, rv);
rv = DoGetProvidedTokenBindingKey();
break;
case STATE_GET_PROVIDED_TOKEN_BINDING_KEY_COMPLETE:
rv = DoGetProvidedTokenBindingKeyComplete(rv);
break;
case STATE_GET_REFERRED_TOKEN_BINDING_KEY:
DCHECK_EQ(OK, rv);
rv = DoGetReferredTokenBindingKey();
break;
case STATE_GET_REFERRED_TOKEN_BINDING_KEY_COMPLETE:
rv = DoGetReferredTokenBindingKeyComplete(rv);
break;
case STATE_INIT_REQUEST_BODY:
DCHECK_EQ(OK, rv);
rv = DoInitRequestBody();
break;
case STATE_INIT_REQUEST_BODY_COMPLETE:
rv = DoInitRequestBodyComplete(rv);
break;
case STATE_BUILD_REQUEST:
DCHECK_EQ(OK, rv);
net_log_.BeginEvent(NetLogEventType::HTTP_TRANSACTION_SEND_REQUEST);
rv = DoBuildRequest();
break;
case STATE_BUILD_REQUEST_COMPLETE:
rv = DoBuildRequestComplete(rv);
break;
case STATE_SEND_REQUEST:
DCHECK_EQ(OK, rv);
rv = DoSendRequest();
break;
case STATE_SEND_REQUEST_COMPLETE:
rv = DoSendRequestComplete(rv);
net_log_.EndEventWithNetErrorCode(
NetLogEventType::HTTP_TRANSACTION_SEND_REQUEST, rv);
break;
case STATE_READ_HEADERS:
DCHECK_EQ(OK, rv);
net_log_.BeginEvent(NetLogEventType::HTTP_TRANSACTION_READ_HEADERS);
rv = DoReadHeaders();
break;
case STATE_READ_HEADERS_COMPLETE:
rv = DoReadHeadersComplete(rv);
net_log_.EndEventWithNetErrorCode(
NetLogEventType::HTTP_TRANSACTION_READ_HEADERS, rv);
break;
case STATE_READ_BODY:
DCHECK_EQ(OK, rv);
net_log_.BeginEvent(NetLogEventType::HTTP_TRANSACTION_READ_BODY);
rv = DoReadBody();
break;
case STATE_READ_BODY_COMPLETE:
rv = DoReadBodyComplete(rv);
net_log_.EndEventWithNetErrorCode(
NetLogEventType::HTTP_TRANSACTION_READ_BODY, rv);
break;
case STATE_DRAIN_BODY_FOR_AUTH_RESTART:
DCHECK_EQ(OK, rv);
net_log_.BeginEvent(
NetLogEventType::HTTP_TRANSACTION_DRAIN_BODY_FOR_AUTH_RESTART);
rv = DoDrainBodyForAuthRestart();
break;
case STATE_DRAIN_BODY_FOR_AUTH_RESTART_COMPLETE:
rv = DoDrainBodyForAuthRestartComplete(rv);
net_log_.EndEventWithNetErrorCode(
NetLogEventType::HTTP_TRANSACTION_DRAIN_BODY_FOR_AUTH_RESTART, rv);
break;
default:
NOTREACHED() << "bad state";
rv = ERR_FAILED;
break;
}
} while (rv != ERR_IO_PENDING && next_state_ != STATE_NONE);
return rv;
}
int HttpNetworkTransaction::DoNotifyBeforeCreateStream() {
next_state_ = STATE_CREATE_STREAM;
bool defer = false;
if (!before_network_start_callback_.is_null())
before_network_start_callback_.Run(&defer);
if (!defer)
return OK;
return ERR_IO_PENDING;
}
int HttpNetworkTransaction::DoCreateStream() {
response_.network_accessed = true;
next_state_ = STATE_CREATE_STREAM_COMPLETE;
// IP based pooling is only enabled on a retry after 421 Misdirected Request
// is received. Alternative Services are also disabled in this case (though
// they can also be disabled when retrying after a QUIC error).
if (!enable_ip_based_pooling_)
DCHECK(!enable_alternative_services_);
if (ForWebSocketHandshake()) {
stream_request_ =
session_->http_stream_factory()->RequestWebSocketHandshakeStream(
*request_, priority_, server_ssl_config_, proxy_ssl_config_, this,
websocket_handshake_stream_base_create_helper_,
enable_ip_based_pooling_, enable_alternative_services_, net_log_);
} else {
stream_request_ = session_->http_stream_factory()->RequestStream(
*request_, priority_, server_ssl_config_, proxy_ssl_config_, this,
enable_ip_based_pooling_, enable_alternative_services_, net_log_);
}
DCHECK(stream_request_.get());
return ERR_IO_PENDING;
}
int HttpNetworkTransaction::DoCreateStreamComplete(int result) {
// Version interference probes should not result in success.
DCHECK(!server_ssl_config_.version_interference_probe || result != OK);
// If |result| is ERR_HTTPS_PROXY_TUNNEL_RESPONSE, then
// DoCreateStreamComplete is being called from OnHttpsProxyTunnelResponse,
// which resets the stream request first. Therefore, we have to grab the
// connection attempts in *that* function instead of here in that case.
if (result != ERR_HTTPS_PROXY_TUNNEL_RESPONSE)
CopyConnectionAttemptsFromStreamRequest();
if (result == OK) {
next_state_ = STATE_INIT_STREAM;
DCHECK(stream_.get());
} else if (result == ERR_SSL_CLIENT_AUTH_CERT_NEEDED) {
result = HandleCertificateRequest(result);
} else if (result == ERR_HTTPS_PROXY_TUNNEL_RESPONSE) {
// Return OK and let the caller read the proxy's error page
next_state_ = STATE_NONE;
return OK;
} else if (result == ERR_HTTP_1_1_REQUIRED ||
result == ERR_PROXY_HTTP_1_1_REQUIRED) {
return HandleHttp11Required(result);
}
// Perform a TLS 1.3 version interference probe on various connection
// errors. The retry will never produce a successful connection but may map
// errors to ERR_SSL_VERSION_INTERFERENCE, which signals a probable
// version-interfering middlebox.
if (IsSecureRequest() && !HasExceededMaxRetries() &&
server_ssl_config_.version_max == SSL_PROTOCOL_VERSION_TLS1_3 &&
!server_ssl_config_.version_interference_probe) {
if (result == ERR_CONNECTION_CLOSED || result == ERR_SSL_PROTOCOL_ERROR ||
result == ERR_SSL_VERSION_OR_CIPHER_MISMATCH ||
result == ERR_CONNECTION_RESET ||
result == ERR_SSL_BAD_RECORD_MAC_ALERT) {
// Report the error code for each time a version interference probe is
// triggered.
base::UmaHistogramSparse("Net.SSLVersionInterferenceProbeTrigger",
std::abs(result));
net_log_.AddEventWithNetErrorCode(
NetLogEventType::SSL_VERSION_INTERFERENCE_PROBE, result);
retry_attempts_++;
server_ssl_config_.version_interference_probe = true;
server_ssl_config_.version_max = SSL_PROTOCOL_VERSION_TLS1_2;
ssl_version_interference_error_ = result;
ResetConnectionAndRequestForResend();
return OK;
}
}
if (result == ERR_SSL_VERSION_INTERFERENCE) {
// Record the error code version interference was detected at.
DCHECK(server_ssl_config_.version_interference_probe);
DCHECK_NE(OK, ssl_version_interference_error_);
base::UmaHistogramSparse("Net.SSLVersionInterferenceError",
std::abs(ssl_version_interference_error_));
}
// Handle possible client certificate errors that may have occurred if the
// stream used SSL for one or more of the layers.
result = HandleSSLClientAuthError(result);
// At this point we are done with the stream_request_.
stream_request_.reset();
return result;
}
int HttpNetworkTransaction::DoInitStream() {
DCHECK(stream_.get());
next_state_ = STATE_INIT_STREAM_COMPLETE;
stream_->GetRemoteEndpoint(&remote_endpoint_);
return stream_->InitializeStream(request_, can_send_early_data_, priority_,
net_log_, io_callback_);
}
int HttpNetworkTransaction::DoInitStreamComplete(int result) {
if (result == OK) {
next_state_ = STATE_GENERATE_PROXY_AUTH_TOKEN;
} else {
if (result < 0)
result = HandleIOError(result);
// The stream initialization failed, so this stream will never be useful.
if (stream_) {
total_received_bytes_ += stream_->GetTotalReceivedBytes();
total_sent_bytes_ += stream_->GetTotalSentBytes();
}
CacheNetErrorDetailsAndResetStream();
}
return result;
}
int HttpNetworkTransaction::DoGenerateProxyAuthToken() {
next_state_ = STATE_GENERATE_PROXY_AUTH_TOKEN_COMPLETE;
if (!ShouldApplyProxyAuth())
return OK;
HttpAuth::Target target = HttpAuth::AUTH_PROXY;
if (!auth_controllers_[target].get())
auth_controllers_[target] =
new HttpAuthController(target,
AuthURL(target),
session_->http_auth_cache(),
session_->http_auth_handler_factory());
return auth_controllers_[target]->MaybeGenerateAuthToken(request_,
io_callback_,
net_log_);
}
int HttpNetworkTransaction::DoGenerateProxyAuthTokenComplete(int rv) {
DCHECK_NE(ERR_IO_PENDING, rv);
if (rv == OK)
next_state_ = STATE_GENERATE_SERVER_AUTH_TOKEN;
return rv;
}
int HttpNetworkTransaction::DoGenerateServerAuthToken() {
next_state_ = STATE_GENERATE_SERVER_AUTH_TOKEN_COMPLETE;
HttpAuth::Target target = HttpAuth::AUTH_SERVER;
if (!auth_controllers_[target].get()) {
auth_controllers_[target] =
new HttpAuthController(target,
AuthURL(target),
session_->http_auth_cache(),
session_->http_auth_handler_factory());
if (request_->load_flags & LOAD_DO_NOT_USE_EMBEDDED_IDENTITY)
auth_controllers_[target]->DisableEmbeddedIdentity();
}
if (!ShouldApplyServerAuth())
return OK;
return auth_controllers_[target]->MaybeGenerateAuthToken(request_,
io_callback_,
net_log_);
}
int HttpNetworkTransaction::DoGenerateServerAuthTokenComplete(int rv) {
DCHECK_NE(ERR_IO_PENDING, rv);
if (rv == OK)
next_state_ = STATE_GET_PROVIDED_TOKEN_BINDING_KEY;
return rv;
}
int HttpNetworkTransaction::DoGetProvidedTokenBindingKey() {
next_state_ = STATE_GET_PROVIDED_TOKEN_BINDING_KEY_COMPLETE;
if (!IsTokenBindingEnabled())
return OK;
net_log_.BeginEvent(NetLogEventType::HTTP_TRANSACTION_GET_TOKEN_BINDING_KEY);
ChannelIDService* channel_id_service = session_->context().channel_id_service;
return channel_id_service->GetOrCreateChannelID(
request_->url.host(), &provided_token_binding_key_, io_callback_,
&token_binding_request_);
}
int HttpNetworkTransaction::DoGetProvidedTokenBindingKeyComplete(int rv) {
DCHECK_NE(ERR_IO_PENDING, rv);
if (IsTokenBindingEnabled()) {
net_log_.EndEventWithNetErrorCode(
NetLogEventType::HTTP_TRANSACTION_GET_TOKEN_BINDING_KEY, rv);
}
if (rv == OK)
next_state_ = STATE_GET_REFERRED_TOKEN_BINDING_KEY;
return rv;
}
int HttpNetworkTransaction::DoGetReferredTokenBindingKey() {
next_state_ = STATE_GET_REFERRED_TOKEN_BINDING_KEY_COMPLETE;
if (!IsTokenBindingEnabled() || request_->token_binding_referrer.empty())
return OK;
net_log_.BeginEvent(NetLogEventType::HTTP_TRANSACTION_GET_TOKEN_BINDING_KEY);
ChannelIDService* channel_id_service = session_->context().channel_id_service;
return channel_id_service->GetOrCreateChannelID(
request_->token_binding_referrer, &referred_token_binding_key_,
io_callback_, &token_binding_request_);
}
int HttpNetworkTransaction::DoGetReferredTokenBindingKeyComplete(int rv) {
DCHECK_NE(ERR_IO_PENDING, rv);
if (IsTokenBindingEnabled() && !request_->token_binding_referrer.empty()) {
net_log_.EndEventWithNetErrorCode(
NetLogEventType::HTTP_TRANSACTION_GET_TOKEN_BINDING_KEY, rv);
}
if (rv == OK)
next_state_ = STATE_INIT_REQUEST_BODY;
return rv;
}
int HttpNetworkTransaction::BuildRequestHeaders(
bool using_http_proxy_without_tunnel) {
request_headers_.SetHeader(HttpRequestHeaders::kHost,
GetHostAndOptionalPort(request_->url));
// For compat with HTTP/1.0 servers and proxies:
if (using_http_proxy_without_tunnel) {
request_headers_.SetHeader(HttpRequestHeaders::kProxyConnection,
"keep-alive");
} else {
request_headers_.SetHeader(HttpRequestHeaders::kConnection, "keep-alive");
}
// Add a content length header?
if (request_->upload_data_stream) {
if (request_->upload_data_stream->is_chunked()) {
request_headers_.SetHeader(
HttpRequestHeaders::kTransferEncoding, "chunked");
} else {
request_headers_.SetHeader(
HttpRequestHeaders::kContentLength,
base::NumberToString(request_->upload_data_stream->size()));
}
} else if (request_->method == "POST" || request_->method == "PUT") {
// An empty POST/PUT request still needs a content length. As for HEAD,
// IE and Safari also add a content length header. Presumably it is to
// support sending a HEAD request to an URL that only expects to be sent a
// POST or some other method that normally would have a message body.
// Firefox (40.0) does not send the header, and RFC 7230 & 7231
// specify that it should not be sent due to undefined behavior.
request_headers_.SetHeader(HttpRequestHeaders::kContentLength, "0");
}
RecordTokenBindingSupport();
if (provided_token_binding_key_) {
std::string token_binding_header;
int rv = BuildTokenBindingHeader(&token_binding_header);
if (rv != OK)
return rv;
request_headers_.SetHeader(HttpRequestHeaders::kTokenBinding,
token_binding_header);
}
// Honor load flags that impact proxy caches.
if (request_->load_flags & LOAD_BYPASS_CACHE) {
request_headers_.SetHeader(HttpRequestHeaders::kPragma, "no-cache");
request_headers_.SetHeader(HttpRequestHeaders::kCacheControl, "no-cache");
} else if (request_->load_flags & LOAD_VALIDATE_CACHE) {
request_headers_.SetHeader(HttpRequestHeaders::kCacheControl, "max-age=0");
}
if (ShouldApplyProxyAuth() && HaveAuth(HttpAuth::AUTH_PROXY))
auth_controllers_[HttpAuth::AUTH_PROXY]->AddAuthorizationHeader(
&request_headers_);
if (ShouldApplyServerAuth() && HaveAuth(HttpAuth::AUTH_SERVER))
auth_controllers_[HttpAuth::AUTH_SERVER]->AddAuthorizationHeader(
&request_headers_);
request_headers_.MergeFrom(request_->extra_headers);
if (!before_headers_sent_callback_.is_null())
before_headers_sent_callback_.Run(proxy_info_, &request_headers_);
response_.did_use_http_auth =
request_headers_.HasHeader(HttpRequestHeaders::kAuthorization) ||
request_headers_.HasHeader(HttpRequestHeaders::kProxyAuthorization);
return OK;
}
int HttpNetworkTransaction::BuildTokenBindingHeader(std::string* out) {
base::TimeTicks start = base::TimeTicks::Now();
std::vector<uint8_t> signed_ekm;
int rv = stream_->GetTokenBindingSignature(provided_token_binding_key_.get(),
TokenBindingType::PROVIDED,
&signed_ekm);
if (rv != OK)
return rv;
std::string provided_token_binding;
rv = BuildTokenBinding(TokenBindingType::PROVIDED,
provided_token_binding_key_.get(), signed_ekm,
&provided_token_binding);
if (rv != OK)
return rv;
std::vector<base::StringPiece> token_bindings;
token_bindings.push_back(provided_token_binding);
std::string referred_token_binding;
if (referred_token_binding_key_) {
std::vector<uint8_t> referred_signed_ekm;
int rv = stream_->GetTokenBindingSignature(
referred_token_binding_key_.get(), TokenBindingType::REFERRED,
&referred_signed_ekm);
if (rv != OK)
return rv;
rv = BuildTokenBinding(TokenBindingType::REFERRED,
referred_token_binding_key_.get(),
referred_signed_ekm, &referred_token_binding);
if (rv != OK)
return rv;
token_bindings.push_back(referred_token_binding);
}
std::string header;
rv = BuildTokenBindingMessageFromTokenBindings(token_bindings, &header);
if (rv != OK)
return rv;
base::Base64UrlEncode(header, base::Base64UrlEncodePolicy::OMIT_PADDING, out);
base::TimeDelta header_creation_time = base::TimeTicks::Now() - start;
UMA_HISTOGRAM_CUSTOM_TIMES("Net.TokenBinding.HeaderCreationTime",
header_creation_time,
base::TimeDelta::FromMilliseconds(1),
base::TimeDelta::FromMinutes(1), 50);
return OK;
}
int HttpNetworkTransaction::DoInitRequestBody() {
next_state_ = STATE_INIT_REQUEST_BODY_COMPLETE;
int rv = OK;
if (request_->upload_data_stream)
rv = request_->upload_data_stream->Init(
base::BindOnce(&HttpNetworkTransaction::OnIOComplete,
base::Unretained(this)),
net_log_);
return rv;
}
int HttpNetworkTransaction::DoInitRequestBodyComplete(int result) {
if (result == OK)
next_state_ = STATE_BUILD_REQUEST;
return result;
}
int HttpNetworkTransaction::DoBuildRequest() {
next_state_ = STATE_BUILD_REQUEST_COMPLETE;
headers_valid_ = false;
// This is constructed lazily (instead of within our Start method), so that
// we have proxy info available.
if (request_headers_.IsEmpty()) {
bool using_http_proxy_without_tunnel = UsingHttpProxyWithoutTunnel();
return BuildRequestHeaders(using_http_proxy_without_tunnel);
}
return OK;
}
int HttpNetworkTransaction::DoBuildRequestComplete(int result) {
if (result == OK)
next_state_ = STATE_SEND_REQUEST;
return result;
}
int HttpNetworkTransaction::DoSendRequest() {
send_start_time_ = base::TimeTicks::Now();
next_state_ = STATE_SEND_REQUEST_COMPLETE;
return stream_->SendRequest(request_headers_, &response_, io_callback_);
}
int HttpNetworkTransaction::DoSendRequestComplete(int result) {
send_end_time_ = base::TimeTicks::Now();
if (result == ERR_HTTP_1_1_REQUIRED ||
result == ERR_PROXY_HTTP_1_1_REQUIRED) {
return HandleHttp11Required(result);
}
if (result < 0)
return HandleIOError(result);
next_state_ = STATE_READ_HEADERS;
return OK;
}
int HttpNetworkTransaction::DoReadHeaders() {
next_state_ = STATE_READ_HEADERS_COMPLETE;
return stream_->ReadResponseHeaders(io_callback_);
}
int HttpNetworkTransaction::DoReadHeadersComplete(int result) {
// We can get a certificate error or ERR_SSL_CLIENT_AUTH_CERT_NEEDED here
// due to SSL renegotiation.
if (IsCertificateError(result)) {
// We don't handle a certificate error during SSL renegotiation, so we
// have to return an error that's not in the certificate error range
// (-2xx).
LOG(ERROR) << "Got a server certificate with error " << result
<< " during SSL renegotiation";
result = ERR_CERT_ERROR_IN_SSL_RENEGOTIATION;
} else if (result == ERR_SSL_CLIENT_AUTH_CERT_NEEDED) {
// TODO(wtc): Need a test case for this code path!
DCHECK(stream_.get());
DCHECK(IsSecureRequest());
response_.cert_request_info = new SSLCertRequestInfo;
stream_->GetSSLCertRequestInfo(response_.cert_request_info.get());
result = HandleCertificateRequest(result);
if (result == OK)
return result;
}
if (result == ERR_HTTP_1_1_REQUIRED ||
result == ERR_PROXY_HTTP_1_1_REQUIRED) {
return HandleHttp11Required(result);
}
// ERR_CONNECTION_CLOSED is treated differently at this point; if partial
// response headers were received, we do the best we can to make sense of it
// and send it back up the stack.
//
// TODO(davidben): Consider moving this to HttpBasicStream, It's a little
// bizarre for SPDY. Assuming this logic is useful at all.
// TODO(davidben): Bubble the error code up so we do not cache?
if (result == ERR_CONNECTION_CLOSED && response_.headers.get())
result = OK;
if (result < 0)
return HandleIOError(result);
DCHECK(response_.headers.get());
if (response_.headers.get() && !ContentEncodingsValid())
return ERR_CONTENT_DECODING_FAILED;
// On a 408 response from the server ("Request Timeout") on a stale socket,
// retry the request.
// Headers can be NULL because of http://crbug.com/384554.
if (response_.headers.get() &&
response_.headers->response_code() == HTTP_REQUEST_TIMEOUT &&
stream_->IsConnectionReused()) {
net_log_.AddEventWithNetErrorCode(
NetLogEventType::HTTP_TRANSACTION_RESTART_AFTER_ERROR,
response_.headers->response_code());
// This will close the socket - it would be weird to try and reuse it, even
// if the server doesn't actually close it.
ResetConnectionAndRequestForResend();
return OK;
}
// Like Net.HttpResponseCode, but only for MAIN_FRAME loads.
if (request_->load_flags & LOAD_MAIN_FRAME_DEPRECATED) {
const int response_code = response_.headers->response_code();
UMA_HISTOGRAM_ENUMERATION(
"Net.HttpResponseCode_Nxx_MainFrame", response_code/100, 10);
}
net_log_.AddEvent(
NetLogEventType::HTTP_TRANSACTION_READ_RESPONSE_HEADERS,
base::Bind(&HttpResponseHeaders::NetLogCallback, response_.headers));
if (response_headers_callback_)
response_headers_callback_.Run(response_.headers);
if (response_.headers->GetHttpVersion() < HttpVersion(1, 0)) {
// HTTP/0.9 doesn't support the PUT method, so lack of response headers
// indicates a buggy server. See:
// https://bugzilla.mozilla.org/show_bug.cgi?id=193921
if (request_->method == "PUT")
return ERR_METHOD_NOT_SUPPORTED;
}
if (can_send_early_data_ && response_.headers.get() &&
response_.headers->response_code() == HTTP_TOO_EARLY) {
return HandleIOError(ERR_EARLY_DATA_REJECTED);
}
// Check for an intermediate 100 Continue response. An origin server is
// allowed to send this response even if we didn't ask for it, so we just
// need to skip over it.
// We treat any other 1xx in this same way (although in practice getting
// a 1xx that isn't a 100 is rare).
// Unless this is a WebSocket request, in which case we pass it on up.
if (response_.headers->response_code() / 100 == 1 &&
!ForWebSocketHandshake()) {
response_.headers = new HttpResponseHeaders(std::string());
next_state_ = STATE_READ_HEADERS;
return OK;
}
if (response_.headers->response_code() == 421 &&
(enable_ip_based_pooling_ || enable_alternative_services_)) {
// Retry the request with both IP based pooling and Alternative Services
// disabled.
enable_ip_based_pooling_ = false;
enable_alternative_services_ = false;
net_log_.AddEvent(
NetLogEventType::HTTP_TRANSACTION_RESTART_MISDIRECTED_REQUEST);
ResetConnectionAndRequestForResend();
return OK;
}
if (IsSecureRequest()) {
stream_->GetSSLInfo(&response_.ssl_info);
if (response_.ssl_info.is_valid() &&
!IsCertStatusError(response_.ssl_info.cert_status)) {
session_->http_stream_factory()->ProcessAlternativeServices(
session_, response_.headers.get(),
url::SchemeHostPort(request_->url));
}
}
int rv = HandleAuthChallenge();
if (rv != OK)
return rv;
headers_valid_ = true;
// We have reached the end of Start state machine, set the RequestInfo to
// null.
// RequestInfo is a member of the HttpTransaction's consumer and is useful
// only until the final response headers are received. Clearing it will ensure
// that HttpRequestInfo is only used up until final response headers are
// received. Clearing is allowed so that the transaction can be disassociated
// from its creating consumer in cases where it is shared for writing to the
// cache. It is also safe to set it to null at this point since
// upload_data_stream is also not used in the Read state machine.
if (pending_auth_target_ == HttpAuth::AUTH_NONE)
request_ = nullptr;
return OK;
}
int HttpNetworkTransaction::DoReadBody() {
DCHECK(read_buf_.get());
DCHECK_GT(read_buf_len_, 0);
DCHECK(stream_ != NULL);
next_state_ = STATE_READ_BODY_COMPLETE;
return stream_->ReadResponseBody(
read_buf_.get(), read_buf_len_, io_callback_);
}
int HttpNetworkTransaction::DoReadBodyComplete(int result) {
// We are done with the Read call.
bool done = false;
if (result <= 0) {
DCHECK_NE(ERR_IO_PENDING, result);
done = true;
}
// Clean up connection if we are done.
if (done) {
// Note: Just because IsResponseBodyComplete is true, we're not
// necessarily "done". We're only "done" when it is the last
// read on this HttpNetworkTransaction, which will be signified
// by a zero-length read.
// TODO(mbelshe): The keep-alive property is really a property of
// the stream. No need to compute it here just to pass back
// to the stream's Close function.
bool keep_alive =
stream_->IsResponseBodyComplete() && stream_->CanReuseConnection();
stream_->Close(!keep_alive);
// Note: we don't reset the stream here. We've closed it, but we still
// need it around so that callers can call methods such as
// GetUploadProgress() and have them be meaningful.
// TODO(mbelshe): This means we closed the stream here, and we close it
// again in ~HttpNetworkTransaction. Clean that up.
// The next Read call will return 0 (EOF).
// This transaction was successful. If it had been retried because of an
// error with an alternative service, mark that alternative service broken.
if (!enable_alternative_services_ &&
retried_alternative_service_.protocol != kProtoUnknown) {
session_->http_server_properties()->MarkAlternativeServiceBroken(
retried_alternative_service_);
}
}
// Clear these to avoid leaving around old state.
read_buf_ = NULL;
read_buf_len_ = 0;
return result;
}
int HttpNetworkTransaction::DoDrainBodyForAuthRestart() {
// This method differs from DoReadBody only in the next_state_. So we just
// call DoReadBody and override the next_state_. Perhaps there is a more
// elegant way for these two methods to share code.
int rv = DoReadBody();
DCHECK(next_state_ == STATE_READ_BODY_COMPLETE);
next_state_ = STATE_DRAIN_BODY_FOR_AUTH_RESTART_COMPLETE;
return rv;
}
// TODO(wtc): This method and the DoReadBodyComplete method are almost
// the same. Figure out a good way for these two methods to share code.
int HttpNetworkTransaction::DoDrainBodyForAuthRestartComplete(int result) {
// keep_alive defaults to true because the very reason we're draining the
// response body is to reuse the connection for auth restart.
bool done = false, keep_alive = true;
if (result < 0) {
// Error or closed connection while reading the socket.
done = true;
keep_alive = false;
} else if (stream_->IsResponseBodyComplete()) {
done = true;
}
if (done) {
DidDrainBodyForAuthRestart(keep_alive);
} else {
// Keep draining.
next_state_ = STATE_DRAIN_BODY_FOR_AUTH_RESTART;
}
return OK;
}
int HttpNetworkTransaction::HandleCertificateRequest(int error) {
// There are two paths through which the server can request a certificate
// from us. The first is during the initial handshake, the second is
// during SSL renegotiation.
//
// In both cases, we want to close the connection before proceeding.
// We do this for two reasons:
// First, we don't want to keep the connection to the server hung for a
// long time while the user selects a certificate.
// Second, even if we did keep the connection open, NSS has a bug where
// restarting the handshake for ClientAuth is currently broken.
DCHECK_EQ(error, ERR_SSL_CLIENT_AUTH_CERT_NEEDED);
if (stream_.get()) {
// Since we already have a stream, we're being called as part of SSL
// renegotiation.
DCHECK(!stream_request_.get());
total_received_bytes_ += stream_->GetTotalReceivedBytes();
total_sent_bytes_ += stream_->GetTotalSentBytes();
stream_->Close(true);
CacheNetErrorDetailsAndResetStream();
}
// The server is asking for a client certificate during the initial
// handshake.
stream_request_.reset();
// If the user selected one of the certificates in client_certs or declined
// to provide one for this server before, use the past decision
// automatically.
scoped_refptr<X509Certificate> client_cert;
scoped_refptr<SSLPrivateKey> client_private_key;
bool found_cached_cert = session_->ssl_client_auth_cache()->Lookup(
response_.cert_request_info->host_and_port, &client_cert,
&client_private_key);
if (!found_cached_cert)
return error;
// Check that the certificate selected is still a certificate the server
// is likely to accept, based on the criteria supplied in the
// CertificateRequest message.
if (client_cert.get()) {
const std::vector<std::string>& cert_authorities =
response_.cert_request_info->cert_authorities;
bool cert_still_valid = cert_authorities.empty() ||
client_cert->IsIssuedByEncoded(cert_authorities);
if (!cert_still_valid)
return error;
}
if (!response_.cert_request_info->is_proxy) {
server_ssl_client_cert_was_cached_ = true;
}
// TODO(davidben): Add a unit test which covers this path; we need to be
// able to send a legitimate certificate and also bypass/clear the
// SSL session cache.
SSLConfig* ssl_config = response_.cert_request_info->is_proxy ?
&proxy_ssl_config_ : &server_ssl_config_;
ssl_config->send_client_cert = true;
ssl_config->client_cert = client_cert;
ssl_config->client_private_key = client_private_key;
next_state_ = STATE_CREATE_STREAM;
// Reset the other member variables.
// Note: this is necessary only with SSL renegotiation.
ResetStateForRestart();
return OK;
}
int HttpNetworkTransaction::HandleHttp11Required(int error) {
DCHECK(error == ERR_HTTP_1_1_REQUIRED ||
error == ERR_PROXY_HTTP_1_1_REQUIRED);
if (error == ERR_HTTP_1_1_REQUIRED) {
HttpServerProperties::ForceHTTP11(&server_ssl_config_);
} else {
HttpServerProperties::ForceHTTP11(&proxy_ssl_config_);
}
ResetConnectionAndRequestForResend();
return OK;
}
int HttpNetworkTransaction::HandleSSLClientAuthError(int error) {
// TODO(davidben): This does handle client certificate errors from the
// proxy. https://crbug.com/814911.
if (server_ssl_config_.send_client_cert &&
(error == ERR_SSL_PROTOCOL_ERROR || IsClientCertificateError(error))) {
session_->ssl_client_auth_cache()->Remove(
HostPortPair::FromURL(request_->url));
// The private key handle may have gone stale due to, e.g., the user
// unplugging their smartcard. Operating systems do not provide reliable
// notifications for this, so if the signature failed and the private key
// came from SSLClientAuthCache, retry to ask the user for a new one.
if (error == ERR_SSL_CLIENT_AUTH_SIGNATURE_FAILED &&
server_ssl_client_cert_was_cached_ && !HasExceededMaxRetries()) {
server_ssl_client_cert_was_cached_ = false;
server_ssl_config_.send_client_cert = false;
server_ssl_config_.client_cert = nullptr;
server_ssl_config_.client_private_key = nullptr;
retry_attempts_++;
net_log_.AddEventWithNetErrorCode(
NetLogEventType::HTTP_TRANSACTION_RESTART_AFTER_ERROR, error);
ResetConnectionAndRequestForResend();
return OK;
}
}
return error;
}
// This method determines whether it is safe to resend the request after an
// IO error. It can only be called in response to request header or body
// write errors or response header read errors. It should not be used in
// other cases, such as a Connect error.
int HttpNetworkTransaction::HandleIOError(int error) {
// Because the peer may request renegotiation with client authentication at
// any time, check and handle client authentication errors.
error = HandleSSLClientAuthError(error);
switch (error) {
// If we try to reuse a connection that the server is in the process of
// closing, we may end up successfully writing out our request (or a
// portion of our request) only to find a connection error when we try to
// read from (or finish writing to) the socket.
case ERR_CONNECTION_RESET:
case ERR_CONNECTION_CLOSED:
case ERR_CONNECTION_ABORTED:
// There can be a race between the socket pool checking checking whether a
// socket is still connected, receiving the FIN, and sending/reading data
// on a reused socket. If we receive the FIN between the connectedness
// check and writing/reading from the socket, we may first learn the socket
// is disconnected when we get a ERR_SOCKET_NOT_CONNECTED. This will most
// likely happen when trying to retrieve its IP address.
// See http://crbug.com/105824 for more details.
case ERR_SOCKET_NOT_CONNECTED:
// If a socket is closed on its initial request, HttpStreamParser returns
// ERR_EMPTY_RESPONSE. This may still be close/reuse race if the socket was
// preconnected but failed to be used before the server timed it out.
case ERR_EMPTY_RESPONSE:
if (ShouldResendRequest()) {
net_log_.AddEventWithNetErrorCode(
NetLogEventType::HTTP_TRANSACTION_RESTART_AFTER_ERROR, error);
ResetConnectionAndRequestForResend();
error = OK;
}
break;
case ERR_EARLY_DATA_REJECTED:
case ERR_WRONG_VERSION_ON_EARLY_DATA:
net_log_.AddEventWithNetErrorCode(
NetLogEventType::HTTP_TRANSACTION_RESTART_AFTER_ERROR, error);
// Disable early data on the SSLConfig on a reset.
can_send_early_data_ = false;
ResetConnectionAndRequestForResend();
error = OK;
break;
case ERR_SPDY_PING_FAILED:
case ERR_SPDY_SERVER_REFUSED_STREAM:
case ERR_SPDY_PUSHED_STREAM_NOT_AVAILABLE:
case ERR_SPDY_CLAIMED_PUSHED_STREAM_RESET_BY_SERVER:
case ERR_SPDY_PUSHED_RESPONSE_DOES_NOT_MATCH:
case ERR_QUIC_HANDSHAKE_FAILED:
if (HasExceededMaxRetries())
break;
net_log_.AddEventWithNetErrorCode(
NetLogEventType::HTTP_TRANSACTION_RESTART_AFTER_ERROR, error);
retry_attempts_++;
ResetConnectionAndRequestForResend();
error = OK;
break;
case ERR_QUIC_PROTOCOL_ERROR:
if (GetResponseHeaders() != nullptr ||
!stream_->GetAlternativeService(&retried_alternative_service_)) {
// If the response headers have already been recieved and passed up
// then the request can not be retried. Also, if there was no
// alternative service used for this request, then there is no
// alternative service to be disabled.
break;
}
if (HasExceededMaxRetries())
break;
if (session_->http_server_properties()->IsAlternativeServiceBroken(
retried_alternative_service_)) {
// If the alternative service was marked as broken while the request
// was in flight, retry the request which will not use the broken
// alternative service.
net_log_.AddEventWithNetErrorCode(
NetLogEventType::HTTP_TRANSACTION_RESTART_AFTER_ERROR, error);
retry_attempts_++;
ResetConnectionAndRequestForResend();
error = OK;
} else if (session_->params().retry_without_alt_svc_on_quic_errors) {
// Disable alternative services for this request and retry it. If the
// retry succeeds, then the alternative service will be marked as
// broken then.
enable_alternative_services_ = false;
net_log_.AddEventWithNetErrorCode(
NetLogEventType::HTTP_TRANSACTION_RESTART_AFTER_ERROR, error);
retry_attempts_++;
ResetConnectionAndRequestForResend();
error = OK;
}
break;
}
return error;
}
void HttpNetworkTransaction::ResetStateForRestart() {
ResetStateForAuthRestart();
if (stream_) {
total_received_bytes_ += stream_->GetTotalReceivedBytes();
total_sent_bytes_ += stream_->GetTotalSentBytes();
}
CacheNetErrorDetailsAndResetStream();
}
void HttpNetworkTransaction::ResetStateForAuthRestart() {
send_start_time_ = base::TimeTicks();
send_end_time_ = base::TimeTicks();
pending_auth_target_ = HttpAuth::AUTH_NONE;
read_buf_ = NULL;
read_buf_len_ = 0;
headers_valid_ = false;
request_headers_.Clear();
response_ = HttpResponseInfo();
establishing_tunnel_ = false;
remote_endpoint_ = IPEndPoint();
net_error_details_.quic_broken = false;
net_error_details_.quic_connection_error = quic::QUIC_NO_ERROR;
provided_token_binding_key_.reset();
referred_token_binding_key_.reset();
}
void HttpNetworkTransaction::CacheNetErrorDetailsAndResetStream() {
if (stream_)
stream_->PopulateNetErrorDetails(&net_error_details_);
stream_.reset();
}
HttpResponseHeaders* HttpNetworkTransaction::GetResponseHeaders() const {
return response_.headers.get();
}
bool HttpNetworkTransaction::ShouldResendRequest() const {
bool connection_is_proven = stream_->IsConnectionReused();
bool has_received_headers = GetResponseHeaders() != NULL;
// NOTE: we resend a request only if we reused a keep-alive connection.
// This automatically prevents an infinite resend loop because we'll run
// out of the cached keep-alive connections eventually.
if (connection_is_proven && !has_received_headers)
return true;
return false;
}
bool HttpNetworkTransaction::HasExceededMaxRetries() const {
return (retry_attempts_ >= kMaxRetryAttempts);
}
bool HttpNetworkTransaction::CheckMaxRestarts() {
num_restarts_++;
return num_restarts_ < kMaxRestarts;
}
void HttpNetworkTransaction::ResetConnectionAndRequestForResend() {
if (stream_.get()) {
stream_->Close(true);
CacheNetErrorDetailsAndResetStream();
}
// We need to clear request_headers_ because it contains the real request
// headers, but we may need to resend the CONNECT request first to recreate
// the SSL tunnel.
request_headers_.Clear();
next_state_ = STATE_CREATE_STREAM; // Resend the request.
}
bool HttpNetworkTransaction::ShouldApplyProxyAuth() const {
return UsingHttpProxyWithoutTunnel();
}
bool HttpNetworkTransaction::ShouldApplyServerAuth() const {
return !(request_->load_flags & LOAD_DO_NOT_SEND_AUTH_DATA);
}
int HttpNetworkTransaction::HandleAuthChallenge() {
scoped_refptr<HttpResponseHeaders> headers(GetResponseHeaders());
DCHECK(headers.get());
int status = headers->response_code();
if (status != HTTP_UNAUTHORIZED &&
status != HTTP_PROXY_AUTHENTICATION_REQUIRED)
return OK;
HttpAuth::Target target = status == HTTP_PROXY_AUTHENTICATION_REQUIRED ?
HttpAuth::AUTH_PROXY : HttpAuth::AUTH_SERVER;
if (target == HttpAuth::AUTH_PROXY && proxy_info_.is_direct())
return ERR_UNEXPECTED_PROXY_AUTH;
// This case can trigger when an HTTPS server responds with a "Proxy
// authentication required" status code through a non-authenticating
// proxy.
if (!auth_controllers_[target].get())
return ERR_UNEXPECTED_PROXY_AUTH;
int rv = auth_controllers_[target]->HandleAuthChallenge(
headers, response_.ssl_info,
(request_->load_flags & LOAD_DO_NOT_SEND_AUTH_DATA) != 0, false,
net_log_);
if (auth_controllers_[target]->HaveAuthHandler())
pending_auth_target_ = target;
scoped_refptr<AuthChallengeInfo> auth_info =
auth_controllers_[target]->auth_info();
if (auth_info.get())
response_.auth_challenge = auth_info;
return rv;
}
bool HttpNetworkTransaction::HaveAuth(HttpAuth::Target target) const {
return auth_controllers_[target].get() &&
auth_controllers_[target]->HaveAuth();
}
GURL HttpNetworkTransaction::AuthURL(HttpAuth::Target target) const {
switch (target) {
case HttpAuth::AUTH_PROXY: {
if (!proxy_info_.proxy_server().is_valid() ||
proxy_info_.proxy_server().is_direct()) {
return GURL(); // There is no proxy server.
}
const char* scheme = proxy_info_.is_https() ? "https://" : "http://";
return GURL(scheme +
proxy_info_.proxy_server().host_port_pair().ToString());
}
case HttpAuth::AUTH_SERVER:
if (ForWebSocketHandshake()) {
const GURL& url = request_->url;
url::Replacements<char> ws_to_http;
if (url.SchemeIs("ws")) {
ws_to_http.SetScheme("http", url::Component(0, 4));
} else {
DCHECK(url.SchemeIs("wss"));
ws_to_http.SetScheme("https", url::Component(0, 5));
}
return url.ReplaceComponents(ws_to_http);
}
return request_->url;
default:
return GURL();
}
}
bool HttpNetworkTransaction::ForWebSocketHandshake() const {
return websocket_handshake_stream_base_create_helper_ &&
request_->url.SchemeIsWSOrWSS();
}
void HttpNetworkTransaction::CopyConnectionAttemptsFromStreamRequest() {
DCHECK(stream_request_);
// Since the transaction can restart with auth credentials, it may create a
// stream more than once. Accumulate all of the connection attempts across
// those streams by appending them to the vector:
for (const auto& attempt : stream_request_->connection_attempts())
connection_attempts_.push_back(attempt);
}
bool HttpNetworkTransaction::ContentEncodingsValid() const {
HttpResponseHeaders* headers = GetResponseHeaders();
DCHECK(headers);
std::string accept_encoding;
request_headers_.GetHeader(HttpRequestHeaders::kAcceptEncoding,
&accept_encoding);
std::set<std::string> allowed_encodings;
if (!HttpUtil::ParseAcceptEncoding(accept_encoding, &allowed_encodings)) {
FilterSourceStream::ReportContentDecodingFailed(SourceStream::TYPE_INVALID);
return false;
}
std::string content_encoding;
headers->GetNormalizedHeader("Content-Encoding", &content_encoding);
std::set<std::string> used_encodings;
if (!HttpUtil::ParseContentEncoding(content_encoding, &used_encodings)) {
FilterSourceStream::ReportContentDecodingFailed(SourceStream::TYPE_INVALID);
return false;
}
// When "Accept-Encoding" is not specified, it is parsed as "*".
// If "*" encoding is advertised, then any encoding should be "accepted".
// This does not mean, that it will be successfully decoded.
if (allowed_encodings.find("*") != allowed_encodings.end())
return true;
bool result = true;
for (auto const& encoding : used_encodings) {
SourceStream::SourceType source_type =
FilterSourceStream::ParseEncodingType(encoding);
// We don't reject encodings we are not aware. They just will not decode.
if (source_type == SourceStream::TYPE_UNKNOWN)
continue;
if (allowed_encodings.find(encoding) == allowed_encodings.end()) {
FilterSourceStream::ReportContentDecodingFailed(
SourceStream::TYPE_REJECTED);
result = false;
break;
}
}
// Temporary workaround for http://crbug.com/714514
if (headers->IsRedirect(nullptr)) {
UMA_HISTOGRAM_BOOLEAN("Net.RedirectWithUnadvertisedContentEncoding",
!result);
return true;
}
return result;
}
} // namespace net