blob: 532f9de0692eeaddfe980c4f913250c9e9328158 [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 <vector>
#include "base/bind.h"
#include "base/bind_helpers.h"
#include "base/compiler_specific.h"
#include "base/format_macros.h"
#include "base/memory/scoped_ptr.h"
#include "base/metrics/field_trial.h"
#include "base/metrics/histogram.h"
#include "base/metrics/stats_counters.h"
#include "base/stl_util.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_util.h"
#include "base/strings/stringprintf.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/net_util.h"
#include "net/base/upload_data_stream.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_base.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/socket/client_socket_factory.h"
#include "net/socket/socks_client_socket_pool.h"
#include "net/socket/ssl_client_socket.h"
#include "net/socket/ssl_client_socket_pool.h"
#include "net/socket/transport_client_socket_pool.h"
#include "net/spdy/hpack_huffman_aggregator.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 "url/gurl.h"
#include "url/url_canon.h"
using base::Time;
using base::TimeDelta;
namespace net {
namespace {
void ProcessAlternateProtocol(
HttpNetworkSession* session,
const HttpResponseHeaders& headers,
const HostPortPair& http_host_port_pair) {
if (!headers.HasHeader(kAlternateProtocolHeader))
return;
std::vector<std::string> alternate_protocol_values;
void* iter = NULL;
std::string alternate_protocol_str;
while (headers.EnumerateHeader(&iter, kAlternateProtocolHeader,
&alternate_protocol_str)) {
alternate_protocol_values.push_back(alternate_protocol_str);
}
session->http_stream_factory()->ProcessAlternateProtocol(
session->http_server_properties(),
alternate_protocol_values,
http_host_port_pair,
*session);
}
// Returns true if |error| is a client certificate authentication error.
bool IsClientCertificateError(int error) {
switch (error) {
case ERR_BAD_SSL_CLIENT_AUTH_CERT:
case ERR_SSL_CLIENT_AUTH_PRIVATE_KEY_ACCESS_DENIED:
case ERR_SSL_CLIENT_AUTH_CERT_NO_PRIVATE_KEY:
case ERR_SSL_CLIENT_AUTH_SIGNATURE_FAILED:
return true;
default:
return false;
}
}
base::Value* NetLogSSLVersionFallbackCallback(
const GURL* url,
int net_error,
uint16 version_before,
uint16 version_after,
NetLog::LogLevel /* log_level */) {
base::DictionaryValue* dict = new base::DictionaryValue();
dict->SetString("host_and_port", GetHostAndPort(*url));
dict->SetInteger("net_error", net_error);
dict->SetInteger("version_before", version_before);
dict->SetInteger("version_after", version_after);
return dict;
}
} // namespace
//-----------------------------------------------------------------------------
HttpNetworkTransaction::HttpNetworkTransaction(RequestPriority priority,
HttpNetworkSession* session)
: pending_auth_target_(HttpAuth::AUTH_NONE),
io_callback_(base::Bind(&HttpNetworkTransaction::OnIOComplete,
base::Unretained(this))),
session_(session),
request_(NULL),
priority_(priority),
headers_valid_(false),
logged_response_time_(false),
fallback_error_code_(ERR_SSL_INAPPROPRIATE_FALLBACK),
request_headers_(),
read_buf_len_(0),
total_received_bytes_(0),
next_state_(STATE_NONE),
establishing_tunnel_(false),
websocket_handshake_stream_base_create_helper_(NULL) {
session->ssl_config_service()->GetSSLConfig(&server_ssl_config_);
session->GetNextProtos(&server_ssl_config_.next_protos);
proxy_ssl_config_ = server_ssl_config_;
}
HttpNetworkTransaction::~HttpNetworkTransaction() {
if (stream_.get()) {
HttpResponseHeaders* headers = GetResponseHeaders();
// 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.
bool try_to_keep_alive =
next_state_ == STATE_NONE &&
stream_->CanFindEndOfResponse() &&
(!headers || headers->IsKeepAlive());
if (!try_to_keep_alive) {
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 if (stream_->IsSpdyHttpStream()) {
// Doesn't really matter for SpdyHttpStream. Just close it.
stream_->Close(true /* not reusable */);
} else {
// Otherwise, we try to drain the response body.
HttpStreamBase* 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,
const CompletionCallback& callback,
const BoundNetLog& net_log) {
SIMPLE_STATS_COUNTER("HttpNetworkTransaction.Count");
net_log_ = net_log;
request_ = request_info;
start_time_ = base::Time::Now();
if (request_->load_flags & LOAD_DISABLE_CERT_REVOCATION_CHECKING) {
server_ssl_config_.rev_checking_enabled = false;
proxy_ssl_config_.rev_checking_enabled = false;
}
// Channel ID is disabled if privacy mode is enabled for this request.
if (request_->privacy_mode == PRIVACY_MODE_ENABLED)
server_ssl_config_.channel_id_enabled = false;
next_state_ = STATE_NOTIFY_BEFORE_CREATE_STREAM;
int rv = DoLoop(OK);
if (rv == ERR_IO_PENDING)
callback_ = callback;
return rv;
}
int HttpNetworkTransaction::RestartIgnoringLastError(
const CompletionCallback& callback) {
DCHECK(!stream_.get());
DCHECK(!stream_request_.get());
DCHECK_EQ(STATE_NONE, next_state_);
next_state_ = STATE_CREATE_STREAM;
int rv = DoLoop(OK);
if (rv == ERR_IO_PENDING)
callback_ = callback;
return rv;
}
int HttpNetworkTransaction::RestartWithCertificate(
X509Certificate* client_cert, const CompletionCallback& 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_);
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;
session_->ssl_client_auth_cache()->Add(
response_.cert_request_info->host_and_port, client_cert);
// 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_ = callback;
return rv;
}
int HttpNetworkTransaction::RestartWithAuth(
const AuthCredentials& credentials, const CompletionCallback& callback) {
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(credentials);
} 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_ = callback;
return rv;
}
void HttpNetworkTransaction::PrepareForAuthRestart(HttpAuth::Target target) {
DCHECK(HaveAuth(target));
DCHECK(!stream_request_.get());
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 (GetResponseHeaders()->IsKeepAlive() &&
stream_->CanFindEndOfResponse()) {
// 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();
HttpStream* new_stream = NULL;
if (keep_alive && stream_->IsConnectionReusable()) {
// We should call connection_->set_idle_time(), but this doesn't occur
// often enough to be worth the trouble.
stream_->SetConnectionReused();
new_stream =
static_cast<HttpStream*>(stream_.get())->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 received bytes.
DCHECK_EQ(0, new_stream->GetTotalReceivedBytes());
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,
const CompletionCallback& callback) {
DCHECK(buf);
DCHECK_LT(0, buf_len);
State next_state = STATE_NONE;
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());
DCHECK_EQ(headers->response_code(), HTTP_PROXY_AUTHENTICATION_REQUIRED);
LOG(WARNING) << "Blocked proxy response with status "
<< headers->response_code() << " to CONNECT request for "
<< GetHostAndPort(request_->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;
next_state_ = next_state;
int rv = DoLoop(OK);
if (rv == ERR_IO_PENDING)
callback_ = callback;
return rv;
}
void HttpNetworkTransaction::StopCaching() {}
bool HttpNetworkTransaction::GetFullRequestHeaders(
HttpRequestHeaders* headers) const {
// TODO(ttuttle): Make sure we've populated request_headers_.
*headers = request_headers_;
return true;
}
int64 HttpNetworkTransaction::GetTotalReceivedBytes() const {
int64 total_received_bytes = total_received_bytes_;
if (stream_)
total_received_bytes += stream_->GetTotalReceivedBytes();
return total_received_bytes;
}
void HttpNetworkTransaction::DoneReading() {}
const HttpResponseInfo* HttpNetworkTransaction::GetResponseInfo() const {
return ((headers_valid_ && response_.headers.get()) ||
response_.ssl_info.cert.get() || response_.cert_request_info.get())
? &response_
: NULL;
}
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;
}
}
UploadProgress HttpNetworkTransaction::GetUploadProgress() const {
if (!stream_.get())
return UploadProgress();
// TODO(bashi): This cast is temporary. Remove later.
return static_cast<HttpStream*>(stream_.get())->GetUploadProgress();
}
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;
}
void HttpNetworkTransaction::SetPriority(RequestPriority priority) {
priority_ = priority;
if (stream_request_)
stream_request_->SetPriority(priority);
if (stream_)
stream_->SetPriority(priority);
}
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::SetBeforeProxyHeadersSentCallback(
const BeforeProxyHeadersSentCallback& callback) {
before_proxy_headers_sent_callback_ = 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,
HttpStreamBase* stream) {
DCHECK_EQ(STATE_CREATE_STREAM_COMPLETE, next_state_);
DCHECK(stream_request_.get());
if (stream_)
total_received_bytes_ += stream_->GetTotalReceivedBytes();
stream_.reset(stream);
server_ssl_config_ = used_ssl_config;
proxy_info_ = used_proxy_info;
response_.was_npn_negotiated = stream_request_->was_npn_negotiated();
response_.npn_negotiated_protocol = SSLClientSocket::NextProtoToString(
stream_request_->protocol_negotiated());
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().host_port_pair();
OnIOComplete(OK);
}
void HttpNetworkTransaction::OnWebSocketHandshakeStreamReady(
const SSLConfig& used_ssl_config,
const ProxyInfo& used_proxy_info,
WebSocketHandshakeStreamBase* stream) {
OnStreamReady(used_ssl_config, used_proxy_info, stream);
}
void HttpNetworkTransaction::OnStreamFailed(int result,
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;
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;
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,
HttpStreamBase* stream) {
DCHECK_EQ(STATE_CREATE_STREAM_COMPLETE, next_state_);
headers_valid_ = true;
response_ = response_info;
server_ssl_config_ = used_ssl_config;
proxy_info_ = used_proxy_info;
if (stream_)
total_received_bytes_ += stream_->GetTotalReceivedBytes();
stream_.reset(stream);
stream_request_.reset(); // we're done with the stream request
OnIOComplete(ERR_HTTPS_PROXY_TUNNEL_RESPONSE);
}
bool HttpNetworkTransaction::is_https_request() const {
return request_->url.SchemeIs("https");
}
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.
CompletionCallback c = callback_;
callback_.Reset();
c.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:
rv = DoCreateStreamComplete(rv);
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_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(NetLog::TYPE_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(
NetLog::TYPE_HTTP_TRANSACTION_SEND_REQUEST, rv);
break;
case STATE_READ_HEADERS:
DCHECK_EQ(OK, rv);
net_log_.BeginEvent(NetLog::TYPE_HTTP_TRANSACTION_READ_HEADERS);
rv = DoReadHeaders();
break;
case STATE_READ_HEADERS_COMPLETE:
rv = DoReadHeadersComplete(rv);
net_log_.EndEventWithNetErrorCode(
NetLog::TYPE_HTTP_TRANSACTION_READ_HEADERS, rv);
break;
case STATE_READ_BODY:
DCHECK_EQ(OK, rv);
net_log_.BeginEvent(NetLog::TYPE_HTTP_TRANSACTION_READ_BODY);
rv = DoReadBody();
break;
case STATE_READ_BODY_COMPLETE:
rv = DoReadBodyComplete(rv);
net_log_.EndEventWithNetErrorCode(
NetLog::TYPE_HTTP_TRANSACTION_READ_BODY, rv);
break;
case STATE_DRAIN_BODY_FOR_AUTH_RESTART:
DCHECK_EQ(OK, rv);
net_log_.BeginEvent(
NetLog::TYPE_HTTP_TRANSACTION_DRAIN_BODY_FOR_AUTH_RESTART);
rv = DoDrainBodyForAuthRestart();
break;
case STATE_DRAIN_BODY_FOR_AUTH_RESTART_COMPLETE:
rv = DoDrainBodyForAuthRestartComplete(rv);
net_log_.EndEventWithNetErrorCode(
NetLog::TYPE_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() {
next_state_ = STATE_CREATE_STREAM_COMPLETE;
if (ForWebSocketHandshake()) {
stream_request_.reset(
session_->http_stream_factory_for_websocket()
->RequestWebSocketHandshakeStream(
*request_,
priority_,
server_ssl_config_,
proxy_ssl_config_,
this,
websocket_handshake_stream_base_create_helper_,
net_log_));
} else {
stream_request_.reset(
session_->http_stream_factory()->RequestStream(
*request_,
priority_,
server_ssl_config_,
proxy_ssl_config_,
this,
net_log_));
}
DCHECK(stream_request_.get());
return ERR_IO_PENDING;
}
int HttpNetworkTransaction::DoCreateStreamComplete(int result) {
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;
}
// Handle possible handshake errors that may have occurred if the stream
// used SSL for one or more of the layers.
result = HandleSSLHandshakeError(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;
return stream_->InitializeStream(request_, 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();
stream_.reset();
}
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_INIT_REQUEST_BODY;
return rv;
}
void HttpNetworkTransaction::BuildRequestHeaders(bool using_proxy) {
request_headers_.SetHeader(HttpRequestHeaders::kHost,
GetHostAndOptionalPort(request_->url));
// For compat with HTTP/1.0 servers and proxies:
if (using_proxy) {
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::Uint64ToString(request_->upload_data_stream->size()));
}
} else if (request_->method == "POST" || request_->method == "PUT" ||
request_->method == "HEAD") {
// 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.
request_headers_.SetHeader(HttpRequestHeaders::kContentLength, "0");
}
// 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 (using_proxy && !before_proxy_headers_sent_callback_.is_null())
before_proxy_headers_sent_callback_.Run(proxy_info_, &request_headers_);
response_.did_use_http_auth =
request_headers_.HasHeader(HttpRequestHeaders::kAuthorization) ||
request_headers_.HasHeader(HttpRequestHeaders::kProxyAuthorization);
}
int HttpNetworkTransaction::DoInitRequestBody() {
next_state_ = STATE_INIT_REQUEST_BODY_COMPLETE;
int rv = OK;
if (request_->upload_data_stream)
rv = request_->upload_data_stream->Init(io_callback_);
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_proxy = (proxy_info_.is_http() || proxy_info_.is_https()) &&
!is_https_request();
BuildRequestHeaders(using_proxy);
}
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 < 0)
return HandleIOError(result);
response_.network_accessed = true;
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(is_https_request());
response_.cert_request_info = new SSLCertRequestInfo;
stream_->GetSSLCertRequestInfo(response_.cert_request_info.get());
result = HandleCertificateRequest(result);
if (result == OK)
return result;
}
if (result == ERR_QUIC_HANDSHAKE_FAILED) {
ResetConnectionAndRequestForResend();
return OK;
}
// After we call RestartWithAuth a new response_time will be recorded, and
// we need to be cautious about incorrectly logging the duration across the
// authentication activity.
if (result == OK)
LogTransactionConnectedMetrics();
// 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());
// 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() == 408 &&
stream_->IsConnectionReused()) {
net_log_.AddEventWithNetErrorCode(
NetLog::TYPE_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) {
const int response_code = response_.headers->response_code();
UMA_HISTOGRAM_ENUMERATION(
"Net.HttpResponseCode_Nxx_MainFrame", response_code/100, 10);
}
net_log_.AddEvent(
NetLog::TYPE_HTTP_TRANSACTION_READ_RESPONSE_HEADERS,
base::Bind(&HttpResponseHeaders::NetLogCallback, response_.headers));
if (response_.headers->GetParsedHttpVersion() < 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;
}
// 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;
}
HostPortPair endpoint = HostPortPair(request_->url.HostNoBrackets(),
request_->url.EffectiveIntPort());
ProcessAlternateProtocol(session_,
*response_.headers.get(),
endpoint);
int rv = HandleAuthChallenge();
if (rv != OK)
return rv;
if (is_https_request())
stream_->GetSSLInfo(&response_.ssl_info);
headers_valid_ = true;
if (session_->huffman_aggregator()) {
session_->huffman_aggregator()->AggregateTransactionCharacterCounts(
*request_,
request_headers_,
proxy_info_.proxy_server(),
*response_.headers.get());
}
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;
}
bool keep_alive = false;
if (stream_->IsResponseBodyComplete()) {
// 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 keepalive property is really a property of
// the stream. No need to compute it here just to pass back
// to the stream's Close function.
// TODO(rtenneti): CanFindEndOfResponse should return false if there are no
// ResponseHeaders.
if (stream_->CanFindEndOfResponse()) {
HttpResponseHeaders* headers = GetResponseHeaders();
if (headers)
keep_alive = headers->IsKeepAlive();
}
}
// Clean up connection if we are done.
if (done) {
LogTransactionMetrics();
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).
}
// 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;
}
void HttpNetworkTransaction::LogTransactionConnectedMetrics() {
if (logged_response_time_)
return;
logged_response_time_ = true;
base::TimeDelta total_duration = response_.response_time - start_time_;
UMA_HISTOGRAM_CUSTOM_TIMES(
"Net.Transaction_Connected",
total_duration,
base::TimeDelta::FromMilliseconds(1), base::TimeDelta::FromMinutes(10),
100);
bool reused_socket = stream_->IsConnectionReused();
if (!reused_socket) {
UMA_HISTOGRAM_CUSTOM_TIMES(
"Net.Transaction_Connected_New_b",
total_duration,
base::TimeDelta::FromMilliseconds(1), base::TimeDelta::FromMinutes(10),
100);
}
// Currently, non-HIGHEST priority requests are frame or sub-frame resource
// types. This will change when we also prioritize certain subresources like
// css, js, etc.
if (priority_ != HIGHEST) {
UMA_HISTOGRAM_CUSTOM_TIMES(
"Net.Priority_High_Latency_b",
total_duration,
base::TimeDelta::FromMilliseconds(1), base::TimeDelta::FromMinutes(10),
100);
} else {
UMA_HISTOGRAM_CUSTOM_TIMES(
"Net.Priority_Low_Latency_b",
total_duration,
base::TimeDelta::FromMilliseconds(1), base::TimeDelta::FromMinutes(10),
100);
}
}
void HttpNetworkTransaction::LogTransactionMetrics() const {
base::TimeDelta duration = base::Time::Now() -
response_.request_time;
if (60 < duration.InMinutes())
return;
base::TimeDelta total_duration = base::Time::Now() - start_time_;
UMA_HISTOGRAM_CUSTOM_TIMES("Net.Transaction_Latency_b", duration,
base::TimeDelta::FromMilliseconds(1),
base::TimeDelta::FromMinutes(10),
100);
UMA_HISTOGRAM_CUSTOM_TIMES("Net.Transaction_Latency_Total",
total_duration,
base::TimeDelta::FromMilliseconds(1),
base::TimeDelta::FromMinutes(10), 100);
if (!stream_->IsConnectionReused()) {
UMA_HISTOGRAM_CUSTOM_TIMES(
"Net.Transaction_Latency_Total_New_Connection",
total_duration, base::TimeDelta::FromMilliseconds(1),
base::TimeDelta::FromMinutes(10), 100);
}
}
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();
stream_->Close(true);
stream_.reset();
}
// 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;
bool found_cached_cert = session_->ssl_client_auth_cache()->Lookup(
response_.cert_request_info->host_and_port, &client_cert);
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;
}
// 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;
next_state_ = STATE_CREATE_STREAM;
// Reset the other member variables.
// Note: this is necessary only with SSL renegotiation.
ResetStateForRestart();
return OK;
}
void HttpNetworkTransaction::HandleClientAuthError(int error) {
if (server_ssl_config_.send_client_cert &&
(error == ERR_SSL_PROTOCOL_ERROR || IsClientCertificateError(error))) {
session_->ssl_client_auth_cache()->Remove(
HostPortPair::FromURL(request_->url));
}
}
// TODO(rch): This does not correctly handle errors when an SSL proxy is
// being used, as all of the errors are handled as if they were generated
// by the endpoint host, request_->url, rather than considering if they were
// generated by the SSL proxy. http://crbug.com/69329
int HttpNetworkTransaction::HandleSSLHandshakeError(int error) {
DCHECK(request_);
HandleClientAuthError(error);
bool should_fallback = false;
uint16 version_max = server_ssl_config_.version_max;
switch (error) {
case ERR_CONNECTION_CLOSED:
case ERR_SSL_PROTOCOL_ERROR:
case ERR_SSL_VERSION_OR_CIPHER_MISMATCH:
if (version_max >= SSL_PROTOCOL_VERSION_TLS1 &&
version_max > server_ssl_config_.version_min) {
// This could be a TLS-intolerant server or a server that chose a
// cipher suite defined only for higher protocol versions (such as
// an SSL 3.0 server that chose a TLS-only cipher suite). Fall
// back to the next lower version and retry.
// NOTE: if the SSLClientSocket class doesn't support TLS 1.1,
// specifying TLS 1.1 in version_max will result in a TLS 1.0
// handshake, so falling back from TLS 1.1 to TLS 1.0 will simply
// repeat the TLS 1.0 handshake. To avoid this problem, the default
// version_max should match the maximum protocol version supported
// by the SSLClientSocket class.
version_max--;
// Fallback to the lower SSL version.
// While SSL 3.0 fallback should be eliminated because of security
// reasons, there is a high risk of breaking the servers if this is
// done in general.
should_fallback = true;
}
break;
case ERR_CONNECTION_RESET:
if (version_max >= SSL_PROTOCOL_VERSION_TLS1_1 &&
version_max > server_ssl_config_.version_min) {
// Some network devices that inspect application-layer packets seem to
// inject TCP reset packets to break the connections when they see TLS
// 1.1 in ClientHello or ServerHello. See http://crbug.com/130293.
//
// Only allow ERR_CONNECTION_RESET to trigger a fallback from TLS 1.1 or
// 1.2. We don't lose much in this fallback because the explicit IV for
// CBC mode in TLS 1.1 is approximated by record splitting in TLS
// 1.0. The fallback will be more painful for TLS 1.2 when we have GCM
// support.
//
// ERR_CONNECTION_RESET is a common network error, so we don't want it
// to trigger a version fallback in general, especially the TLS 1.0 ->
// SSL 3.0 fallback, which would drop TLS extensions.
version_max--;
should_fallback = true;
}
break;
case ERR_SSL_BAD_RECORD_MAC_ALERT:
if (version_max >= SSL_PROTOCOL_VERSION_TLS1_1 &&
version_max > server_ssl_config_.version_min) {
// Some broken SSL devices negotiate TLS 1.0 when sent a TLS 1.1 or
// 1.2 ClientHello, but then return a bad_record_mac alert. See
// crbug.com/260358. In order to make the fallback as minimal as
// possible, this fallback is only triggered for >= TLS 1.1.
version_max--;
should_fallback = true;
}
break;
case ERR_SSL_INAPPROPRIATE_FALLBACK:
// The server told us that we should not have fallen back. A buggy server
// could trigger ERR_SSL_INAPPROPRIATE_FALLBACK with the initial
// connection. |fallback_error_code_| is initialised to
// ERR_SSL_INAPPROPRIATE_FALLBACK to catch this case.
error = fallback_error_code_;
break;
}
if (should_fallback) {
net_log_.AddEvent(
NetLog::TYPE_SSL_VERSION_FALLBACK,
base::Bind(&NetLogSSLVersionFallbackCallback,
&request_->url, error, server_ssl_config_.version_max,
version_max));
fallback_error_code_ = error;
server_ssl_config_.version_max = version_max;
server_ssl_config_.version_fallback = true;
ResetConnectionAndRequestForResend();
error = 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.
HandleClientAuthError(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(
NetLog::TYPE_HTTP_TRANSACTION_RESTART_AFTER_ERROR, error);
ResetConnectionAndRequestForResend();
error = OK;
}
break;
case ERR_SPDY_PING_FAILED:
case ERR_SPDY_SERVER_REFUSED_STREAM:
case ERR_QUIC_HANDSHAKE_FAILED:
net_log_.AddEventWithNetErrorCode(
NetLog::TYPE_HTTP_TRANSACTION_RESTART_AFTER_ERROR, error);
ResetConnectionAndRequestForResend();
error = OK;
break;
}
return error;
}
void HttpNetworkTransaction::ResetStateForRestart() {
ResetStateForAuthRestart();
if (stream_)
total_received_bytes_ += stream_->GetTotalReceivedBytes();
stream_.reset();
}
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;
}
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;
}
void HttpNetworkTransaction::ResetConnectionAndRequestForResend() {
if (stream_.get()) {
stream_->Close(true);
stream_.reset();
}
// 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 !is_https_request() &&
(proxy_info_.is_https() || proxy_info_.is_http());
}
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, (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();
}
#define STATE_CASE(s) \
case s: \
description = base::StringPrintf("%s (0x%08X)", #s, s); \
break
std::string HttpNetworkTransaction::DescribeState(State state) {
std::string description;
switch (state) {
STATE_CASE(STATE_NOTIFY_BEFORE_CREATE_STREAM);
STATE_CASE(STATE_CREATE_STREAM);
STATE_CASE(STATE_CREATE_STREAM_COMPLETE);
STATE_CASE(STATE_INIT_REQUEST_BODY);
STATE_CASE(STATE_INIT_REQUEST_BODY_COMPLETE);
STATE_CASE(STATE_BUILD_REQUEST);
STATE_CASE(STATE_BUILD_REQUEST_COMPLETE);
STATE_CASE(STATE_SEND_REQUEST);
STATE_CASE(STATE_SEND_REQUEST_COMPLETE);
STATE_CASE(STATE_READ_HEADERS);
STATE_CASE(STATE_READ_HEADERS_COMPLETE);
STATE_CASE(STATE_READ_BODY);
STATE_CASE(STATE_READ_BODY_COMPLETE);
STATE_CASE(STATE_DRAIN_BODY_FOR_AUTH_RESTART);
STATE_CASE(STATE_DRAIN_BODY_FOR_AUTH_RESTART_COMPLETE);
STATE_CASE(STATE_NONE);
default:
description = base::StringPrintf("Unknown state 0x%08X (%u)", state,
state);
break;
}
return description;
}
#undef STATE_CASE
} // namespace net