net/http/http_stream_factory_impl_job.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "net/http/http_stream_factory_impl_job.h"
   6
   7 #include <algorithm>
   8 #include <string>
   9
  10 #include "base/bind.h"
  11 #include "base/bind_helpers.h"
  12 #include "base/logging.h"
  13 #include "base/profiler/scoped_tracker.h"
  14 #include "base/stl_util.h"
  15 #include "base/strings/string_util.h"
  16 #include "base/strings/stringprintf.h"
  17 #include "base/values.h"
  18 #include "build/build_config.h"
  19 #include "net/base/connection_type_histograms.h"
  20 #include "net/base/net_log.h"
  21 #include "net/base/net_util.h"
  22 #include "net/http/http_basic_stream.h"
  23 #include "net/http/http_network_session.h"
  24 #include "net/http/http_proxy_client_socket.h"
  25 #include "net/http/http_proxy_client_socket_pool.h"
  26 #include "net/http/http_request_info.h"
  27 #include "net/http/http_server_properties.h"
  28 #include "net/http/http_stream_factory.h"
  29 #include "net/http/http_stream_factory_impl_request.h"
  30 #include "net/quic/quic_http_stream.h"
  31 #include "net/socket/client_socket_handle.h"
  32 #include "net/socket/client_socket_pool.h"
  33 #include "net/socket/client_socket_pool_manager.h"
  34 #include "net/socket/socks_client_socket_pool.h"
  35 #include "net/socket/ssl_client_socket.h"
  36 #include "net/socket/ssl_client_socket_pool.h"
  37 #include "net/spdy/spdy_http_stream.h"
  38 #include "net/spdy/spdy_session.h"
  39 #include "net/spdy/spdy_session_pool.h"
  40 #include "net/ssl/ssl_cert_request_info.h"
  41
  42 namespace net {
  43
  44 // Returns parameters associated with the start of a HTTP stream job.
  45 base::Value* NetLogHttpStreamJobCallback(const GURL* original_url,
  46                                          const GURL* url,
  47                                          RequestPriority priority,
  48                                          NetLog::LogLevel /* log_level */) {
  49   base::DictionaryValue* dict = new base::DictionaryValue();
  50   dict->SetString("original_url", original_url->GetOrigin().spec());
  51   dict->SetString("url", url->GetOrigin().spec());
  52   dict->SetString("priority", RequestPriorityToString(priority));
  53   return dict;
  54 }
  55
  56 // Returns parameters associated with the Proto (with NPN negotiation) of a HTTP
  57 // stream.
  58 base::Value* NetLogHttpStreamProtoCallback(
  59     const SSLClientSocket::NextProtoStatus status,
  60     const std::string* proto,
  61     NetLog::LogLevel /* log_level */) {
  62   base::DictionaryValue* dict = new base::DictionaryValue();
  63
  64   dict->SetString("next_proto_status",
  65                   SSLClientSocket::NextProtoStatusToString(status));
  66   dict->SetString("proto", *proto);
  67   return dict;
  68 }
  69
  70 HttpStreamFactoryImpl::Job::Job(HttpStreamFactoryImpl* stream_factory,
  71                                 HttpNetworkSession* session,
  72                                 const HttpRequestInfo& request_info,
  73                                 RequestPriority priority,
  74                                 const SSLConfig& server_ssl_config,
  75                                 const SSLConfig& proxy_ssl_config,
  76                                 NetLog* net_log)
  77     : request_(NULL),
  78       request_info_(request_info),
  79       priority_(priority),
  80       server_ssl_config_(server_ssl_config),
  81       proxy_ssl_config_(proxy_ssl_config),
  82       net_log_(BoundNetLog::Make(net_log, NetLog::SOURCE_HTTP_STREAM_JOB)),
  83       io_callback_(base::Bind(&Job::OnIOComplete, base::Unretained(this))),
  84       connection_(new ClientSocketHandle),
  85       session_(session),
  86       stream_factory_(stream_factory),
  87       next_state_(STATE_NONE),
  88       pac_request_(NULL),
  89       blocking_job_(NULL),
  90       waiting_job_(NULL),
  91       using_ssl_(false),
  92       using_spdy_(false),
  93       using_quic_(false),
  94       quic_request_(session_->quic_stream_factory()),
  95       using_existing_quic_session_(false),
  96       spdy_certificate_error_(OK),
  97       establishing_tunnel_(false),
  98       was_npn_negotiated_(false),
  99       protocol_negotiated_(kProtoUnknown),
 100       num_streams_(0),
 101       spdy_session_direct_(false),
 102       job_status_(STATUS_RUNNING),
 103       other_job_status_(STATUS_RUNNING),
 104       ptr_factory_(this) {
 105   DCHECK(stream_factory);
 106   DCHECK(session);
 107 }
 108
 109 HttpStreamFactoryImpl::Job::~Job() {
 110   net_log_.EndEvent(NetLog::TYPE_HTTP_STREAM_JOB);
 111
 112   // When we're in a partially constructed state, waiting for the user to
 113   // provide certificate handling information or authentication, we can't reuse
 114   // this stream at all.
 115   if (next_state_ == STATE_WAITING_USER_ACTION) {
 116     connection_->socket()->Disconnect();
 117     connection_.reset();
 118   }
 119
 120   if (pac_request_)
 121     session_->proxy_service()->CancelPacRequest(pac_request_);
 122
 123   // The stream could be in a partial state.  It is not reusable.
 124   if (stream_.get() && next_state_ != STATE_DONE)
 125     stream_->Close(true /* not reusable */);
 126 }
 127
 128 void HttpStreamFactoryImpl::Job::Start(Request* request) {
 129   DCHECK(request);
 130   request_ = request;
 131   StartInternal();
 132 }
 133
 134 int HttpStreamFactoryImpl::Job::Preconnect(int num_streams) {
 135   DCHECK_GT(num_streams, 0);
 136   base::WeakPtr<HttpServerProperties> http_server_properties =
 137       session_->http_server_properties();
 138   if (http_server_properties &&
 139       http_server_properties->SupportsRequestPriority(
 140           HostPortPair::FromURL(request_info_.url))) {
 141     num_streams_ = 1;
 142   } else {
 143     num_streams_ = num_streams;
 144   }
 145   return StartInternal();
 146 }
 147
 148 int HttpStreamFactoryImpl::Job::RestartTunnelWithProxyAuth(
 149     const AuthCredentials& credentials) {
 150   DCHECK(establishing_tunnel_);
 151   next_state_ = STATE_RESTART_TUNNEL_AUTH;
 152   stream_.reset();
 153   return RunLoop(OK);
 154 }
 155
 156 LoadState HttpStreamFactoryImpl::Job::GetLoadState() const {
 157   switch (next_state_) {
 158     case STATE_RESOLVE_PROXY_COMPLETE:
 159       return session_->proxy_service()->GetLoadState(pac_request_);
 160     case STATE_INIT_CONNECTION_COMPLETE:
 161     case STATE_CREATE_STREAM_COMPLETE:
 162       return using_quic_ ? LOAD_STATE_CONNECTING : connection_->GetLoadState();
 163     default:
 164       return LOAD_STATE_IDLE;
 165   }
 166 }
 167
 168 void HttpStreamFactoryImpl::Job::MarkAsAlternate(
 169     const GURL& original_url,
 170     AlternativeService alternative_service) {
 171   DCHECK(!original_url_.get());
 172   original_url_.reset(new GURL(original_url));
 173   alternative_service_ = alternative_service;
 174   if (alternative_service.protocol == QUIC) {
 175     DCHECK(session_->params().enable_quic);
 176     using_quic_ = true;
 177   }
 178 }
 179
 180 void HttpStreamFactoryImpl::Job::WaitFor(Job* job) {
 181   DCHECK_EQ(STATE_NONE, next_state_);
 182   DCHECK_EQ(STATE_NONE, job->next_state_);
 183   DCHECK(!blocking_job_);
 184   DCHECK(!job->waiting_job_);
 185   blocking_job_ = job;
 186   job->waiting_job_ = this;
 187 }
 188
 189 void HttpStreamFactoryImpl::Job::Resume(Job* job) {
 190   DCHECK_EQ(blocking_job_, job);
 191   blocking_job_ = NULL;
 192
 193   // We know we're blocked if the next_state_ is STATE_WAIT_FOR_JOB_COMPLETE.
 194   // Unblock |this|.
 195   if (next_state_ == STATE_WAIT_FOR_JOB_COMPLETE) {
 196     base::MessageLoop::current()->PostTask(
 197         FROM_HERE,
 198         base::Bind(&HttpStreamFactoryImpl::Job::OnIOComplete,
 199                    ptr_factory_.GetWeakPtr(), OK));
 200   }
 201 }
 202
 203 void HttpStreamFactoryImpl::Job::Orphan(const Request* request) {
 204   DCHECK_EQ(request_, request);
 205   request_ = NULL;
 206   if (blocking_job_) {
 207     // We've been orphaned, but there's a job we're blocked on. Don't bother
 208     // racing, just cancel ourself.
 209     DCHECK(blocking_job_->waiting_job_);
 210     blocking_job_->waiting_job_ = NULL;
 211     blocking_job_ = NULL;
 212     if (stream_factory_->for_websockets_ &&
 213         connection_ && connection_->socket()) {
 214       connection_->socket()->Disconnect();
 215     }
 216     stream_factory_->OnOrphanedJobComplete(this);
 217   } else if (stream_factory_->for_websockets_) {
 218     // We cancel this job because a WebSocketHandshakeStream can't be created
 219     // without a WebSocketHandshakeStreamBase::CreateHelper which is stored in
 220     // the Request class and isn't accessible from this job.
 221     if (connection_ && connection_->socket()) {
 222       connection_->socket()->Disconnect();
 223     }
 224     stream_factory_->OnOrphanedJobComplete(this);
 225   }
 226 }
 227
 228 void HttpStreamFactoryImpl::Job::SetPriority(RequestPriority priority) {
 229   priority_ = priority;
 230   // TODO(akalin): Propagate this to |connection_| and maybe the
 231   // preconnect state.
 232 }
 233
 234 bool HttpStreamFactoryImpl::Job::was_npn_negotiated() const {
 235   return was_npn_negotiated_;
 236 }
 237
 238 NextProto HttpStreamFactoryImpl::Job::protocol_negotiated() const {
 239   return protocol_negotiated_;
 240 }
 241
 242 bool HttpStreamFactoryImpl::Job::using_spdy() const {
 243   return using_spdy_;
 244 }
 245
 246 const SSLConfig& HttpStreamFactoryImpl::Job::server_ssl_config() const {
 247   return server_ssl_config_;
 248 }
 249
 250 const SSLConfig& HttpStreamFactoryImpl::Job::proxy_ssl_config() const {
 251   return proxy_ssl_config_;
 252 }
 253
 254 const ProxyInfo& HttpStreamFactoryImpl::Job::proxy_info() const {
 255   return proxy_info_;
 256 }
 257
 258 void HttpStreamFactoryImpl::Job::GetSSLInfo() {
 259   DCHECK(using_ssl_);
 260   DCHECK(!establishing_tunnel_);
 261   DCHECK(connection_.get() && connection_->socket());
 262   SSLClientSocket* ssl_socket =
 263       static_cast<SSLClientSocket*>(connection_->socket());
 264   ssl_socket->GetSSLInfo(&ssl_info_);
 265 }
 266
 267 SpdySessionKey HttpStreamFactoryImpl::Job::GetSpdySessionKey() const {
 268   // In the case that we're using an HTTPS proxy for an HTTP url,
 269   // we look for a SPDY session *to* the proxy, instead of to the
 270   // origin server.
 271   PrivacyMode privacy_mode = request_info_.privacy_mode;
 272   if (IsHttpsProxyAndHttpUrl()) {
 273     return SpdySessionKey(proxy_info_.proxy_server().host_port_pair(),
 274                           ProxyServer::Direct(),
 275                           privacy_mode);
 276   } else {
 277     return SpdySessionKey(origin_,
 278                           proxy_info_.proxy_server(),
 279                           privacy_mode);
 280   }
 281 }
 282
 283 bool HttpStreamFactoryImpl::Job::CanUseExistingSpdySession() const {
 284   // We need to make sure that if a spdy session was created for
 285   // https://somehost/ that we don't use that session for http://somehost:443/.
 286   // The only time we can use an existing session is if the request URL is
 287   // https (the normal case) or if we're connection to a SPDY proxy, or
 288   // if we're running with force_spdy_always_.  crbug.com/133176
 289   // TODO(ricea): Add "wss" back to this list when SPDY WebSocket support is
 290   // working.
 291   return request_info_.url.SchemeIs("https") ||
 292          proxy_info_.proxy_server().is_https() ||
 293          session_->params().force_spdy_always;
 294 }
 295
 296 void HttpStreamFactoryImpl::Job::OnStreamReadyCallback() {
 297   DCHECK(stream_.get());
 298   DCHECK(!IsPreconnecting());
 299   DCHECK(!stream_factory_->for_websockets_);
 300   if (IsOrphaned()) {
 301     stream_factory_->OnOrphanedJobComplete(this);
 302   } else {
 303     request_->Complete(was_npn_negotiated(),
 304                        protocol_negotiated(),
 305                        using_spdy(),
 306                        net_log_);
 307     request_->OnStreamReady(this, server_ssl_config_, proxy_info_,
 308                             stream_.release());
 309   }
 310   // |this| may be deleted after this call.
 311 }
 312
 313 void HttpStreamFactoryImpl::Job::OnWebSocketHandshakeStreamReadyCallback() {
 314   DCHECK(websocket_stream_);
 315   DCHECK(!IsPreconnecting());
 316   DCHECK(stream_factory_->for_websockets_);
 317   // An orphaned WebSocket job will be closed immediately and
 318   // never be ready.
 319   DCHECK(!IsOrphaned());
 320   request_->Complete(was_npn_negotiated(),
 321                      protocol_negotiated(),
 322                      using_spdy(),
 323                      net_log_);
 324   request_->OnWebSocketHandshakeStreamReady(this,
 325                                             server_ssl_config_,
 326                                             proxy_info_,
 327                                             websocket_stream_.release());
 328   // |this| may be deleted after this call.
 329 }
 330
 331 void HttpStreamFactoryImpl::Job::OnNewSpdySessionReadyCallback() {
 332   DCHECK(stream_.get());
 333   DCHECK(!IsPreconnecting());
 334   DCHECK(using_spdy());
 335   // Note: an event loop iteration has passed, so |new_spdy_session_| may be
 336   // NULL at this point if the SpdySession closed immediately after creation.
 337   base::WeakPtr<SpdySession> spdy_session = new_spdy_session_;
 338   new_spdy_session_.reset();
 339
 340   // TODO(jgraettinger): Notify the factory, and let that notify |request_|,
 341   // rather than notifying |request_| directly.
 342   if (IsOrphaned()) {
 343     if (spdy_session) {
 344       stream_factory_->OnNewSpdySessionReady(
 345           spdy_session, spdy_session_direct_, server_ssl_config_, proxy_info_,
 346           was_npn_negotiated(), protocol_negotiated(), using_spdy(), net_log_);
 347     }
 348     stream_factory_->OnOrphanedJobComplete(this);
 349   } else {
 350     request_->OnNewSpdySessionReady(
 351         this, stream_.Pass(), spdy_session, spdy_session_direct_);
 352   }
 353   // |this| may be deleted after this call.
 354 }
 355
 356 void HttpStreamFactoryImpl::Job::OnStreamFailedCallback(int result) {
 357   DCHECK(!IsPreconnecting());
 358   if (IsOrphaned())
 359     stream_factory_->OnOrphanedJobComplete(this);
 360   else
 361     request_->OnStreamFailed(this, result, server_ssl_config_);
 362   // |this| may be deleted after this call.
 363 }
 364
 365 void HttpStreamFactoryImpl::Job::OnCertificateErrorCallback(
 366     int result, const SSLInfo& ssl_info) {
 367   DCHECK(!IsPreconnecting());
 368   if (IsOrphaned())
 369     stream_factory_->OnOrphanedJobComplete(this);
 370   else
 371     request_->OnCertificateError(this, result, server_ssl_config_, ssl_info);
 372   // |this| may be deleted after this call.
 373 }
 374
 375 void HttpStreamFactoryImpl::Job::OnNeedsProxyAuthCallback(
 376     const HttpResponseInfo& response,
 377     HttpAuthController* auth_controller) {
 378   DCHECK(!IsPreconnecting());
 379   if (IsOrphaned())
 380     stream_factory_->OnOrphanedJobComplete(this);
 381   else
 382     request_->OnNeedsProxyAuth(
 383         this, response, server_ssl_config_, proxy_info_, auth_controller);
 384   // |this| may be deleted after this call.
 385 }
 386
 387 void HttpStreamFactoryImpl::Job::OnNeedsClientAuthCallback(
 388     SSLCertRequestInfo* cert_info) {
 389   DCHECK(!IsPreconnecting());
 390   if (IsOrphaned())
 391     stream_factory_->OnOrphanedJobComplete(this);
 392   else
 393     request_->OnNeedsClientAuth(this, server_ssl_config_, cert_info);
 394   // |this| may be deleted after this call.
 395 }
 396
 397 void HttpStreamFactoryImpl::Job::OnHttpsProxyTunnelResponseCallback(
 398     const HttpResponseInfo& response_info,
 399     HttpStream* stream) {
 400   DCHECK(!IsPreconnecting());
 401   if (IsOrphaned())
 402     stream_factory_->OnOrphanedJobComplete(this);
 403   else
 404     request_->OnHttpsProxyTunnelResponse(
 405         this, response_info, server_ssl_config_, proxy_info_, stream);
 406   // |this| may be deleted after this call.
 407 }
 408
 409 void HttpStreamFactoryImpl::Job::OnPreconnectsComplete() {
 410   DCHECK(!request_);
 411   if (new_spdy_session_.get()) {
 412     stream_factory_->OnNewSpdySessionReady(new_spdy_session_,
 413                                            spdy_session_direct_,
 414                                            server_ssl_config_,
 415                                            proxy_info_,
 416                                            was_npn_negotiated(),
 417                                            protocol_negotiated(),
 418                                            using_spdy(),
 419                                            net_log_);
 420   }
 421   stream_factory_->OnPreconnectsComplete(this);
 422   // |this| may be deleted after this call.
 423 }
 424
 425 // static
 426 int HttpStreamFactoryImpl::Job::OnHostResolution(
 427     SpdySessionPool* spdy_session_pool,
 428     const SpdySessionKey& spdy_session_key,
 429     const AddressList& addresses,
 430     const BoundNetLog& net_log) {
 431   // It is OK to dereference spdy_session_pool, because the
 432   // ClientSocketPoolManager will be destroyed in the same callback that
 433   // destroys the SpdySessionPool.
 434   return
 435       spdy_session_pool->FindAvailableSession(spdy_session_key, net_log) ?
 436       ERR_SPDY_SESSION_ALREADY_EXISTS : OK;
 437 }
 438
 439 void HttpStreamFactoryImpl::Job::OnIOComplete(int result) {
 440   RunLoop(result);
 441 }
 442
 443 int HttpStreamFactoryImpl::Job::RunLoop(int result) {
 444   result = DoLoop(result);
 445
 446   if (result == ERR_IO_PENDING)
 447     return result;
 448
 449   // If there was an error, we should have already resumed the |waiting_job_|,
 450   // if there was one.
 451   DCHECK(result == OK || waiting_job_ == NULL);
 452
 453   if (IsPreconnecting()) {
 454     base::MessageLoop::current()->PostTask(
 455         FROM_HERE,
 456         base::Bind(&HttpStreamFactoryImpl::Job::OnPreconnectsComplete,
 457                    ptr_factory_.GetWeakPtr()));
 458     return ERR_IO_PENDING;
 459   }
 460
 461   if (IsCertificateError(result)) {
 462     // Retrieve SSL information from the socket.
 463     GetSSLInfo();
 464
 465     next_state_ = STATE_WAITING_USER_ACTION;
 466     base::MessageLoop::current()->PostTask(
 467         FROM_HERE,
 468         base::Bind(&HttpStreamFactoryImpl::Job::OnCertificateErrorCallback,
 469                    ptr_factory_.GetWeakPtr(), result, ssl_info_));
 470     return ERR_IO_PENDING;
 471   }
 472
 473   switch (result) {
 474     case ERR_PROXY_AUTH_REQUESTED: {
 475       UMA_HISTOGRAM_BOOLEAN("Net.ProxyAuthRequested.HasConnection",
 476                             connection_.get() != NULL);
 477       if (!connection_.get())
 478         return ERR_PROXY_AUTH_REQUESTED_WITH_NO_CONNECTION;
 479       CHECK(connection_->socket());
 480       CHECK(establishing_tunnel_);
 481
 482       next_state_ = STATE_WAITING_USER_ACTION;
 483       ProxyClientSocket* proxy_socket =
 484           static_cast<ProxyClientSocket*>(connection_->socket());
 485       base::MessageLoop::current()->PostTask(
 486           FROM_HERE,
 487           base::Bind(&Job::OnNeedsProxyAuthCallback, ptr_factory_.GetWeakPtr(),
 488                      *proxy_socket->GetConnectResponseInfo(),
 489                      proxy_socket->GetAuthController()));
 490       return ERR_IO_PENDING;
 491     }
 492
 493     case ERR_SSL_CLIENT_AUTH_CERT_NEEDED:
 494       base::MessageLoop::current()->PostTask(
 495           FROM_HERE,
 496           base::Bind(&Job::OnNeedsClientAuthCallback, ptr_factory_.GetWeakPtr(),
 497                      connection_->ssl_error_response_info().cert_request_info));
 498       return ERR_IO_PENDING;
 499
 500     case ERR_HTTPS_PROXY_TUNNEL_RESPONSE: {
 501       DCHECK(connection_.get());
 502       DCHECK(connection_->socket());
 503       DCHECK(establishing_tunnel_);
 504
 505       ProxyClientSocket* proxy_socket =
 506           static_cast<ProxyClientSocket*>(connection_->socket());
 507       base::MessageLoop::current()->PostTask(
 508           FROM_HERE,
 509           base::Bind(&Job::OnHttpsProxyTunnelResponseCallback,
 510                      ptr_factory_.GetWeakPtr(),
 511                      *proxy_socket->GetConnectResponseInfo(),
 512                      proxy_socket->CreateConnectResponseStream()));
 513       return ERR_IO_PENDING;
 514     }
 515
 516     case OK:
 517       job_status_ = STATUS_SUCCEEDED;
 518       MaybeMarkAlternateProtocolBroken();
 519       next_state_ = STATE_DONE;
 520       if (new_spdy_session_.get()) {
 521         base::MessageLoop::current()->PostTask(
 522             FROM_HERE,
 523             base::Bind(&Job::OnNewSpdySessionReadyCallback,
 524                        ptr_factory_.GetWeakPtr()));
 525       } else if (stream_factory_->for_websockets_) {
 526         DCHECK(websocket_stream_);
 527         base::MessageLoop::current()->PostTask(
 528             FROM_HERE,
 529             base::Bind(&Job::OnWebSocketHandshakeStreamReadyCallback,
 530                        ptr_factory_.GetWeakPtr()));
 531       } else {
 532         DCHECK(stream_.get());
 533         base::MessageLoop::current()->PostTask(
 534             FROM_HERE,
 535             base::Bind(&Job::OnStreamReadyCallback, ptr_factory_.GetWeakPtr()));
 536       }
 537       return ERR_IO_PENDING;
 538
 539     default:
 540       if (job_status_ != STATUS_BROKEN) {
 541         DCHECK_EQ(STATUS_RUNNING, job_status_);
 542         job_status_ = STATUS_FAILED;
 543         MaybeMarkAlternateProtocolBroken();
 544       }
 545       base::MessageLoop::current()->PostTask(
 546           FROM_HERE,
 547           base::Bind(&Job::OnStreamFailedCallback, ptr_factory_.GetWeakPtr(),
 548                      result));
 549       return ERR_IO_PENDING;
 550   }
 551 }
 552
 553 int HttpStreamFactoryImpl::Job::DoLoop(int result) {
 554   DCHECK_NE(next_state_, STATE_NONE);
 555   int rv = result;
 556   do {
 557     State state = next_state_;
 558     next_state_ = STATE_NONE;
 559     switch (state) {
 560       case STATE_START:
 561         DCHECK_EQ(OK, rv);
 562         rv = DoStart();
 563         break;
 564       case STATE_RESOLVE_PROXY:
 565         DCHECK_EQ(OK, rv);
 566         rv = DoResolveProxy();
 567         break;
 568       case STATE_RESOLVE_PROXY_COMPLETE:
 569         rv = DoResolveProxyComplete(rv);
 570         break;
 571       case STATE_WAIT_FOR_JOB:
 572         DCHECK_EQ(OK, rv);
 573         rv = DoWaitForJob();
 574         break;
 575       case STATE_WAIT_FOR_JOB_COMPLETE:
 576         rv = DoWaitForJobComplete(rv);
 577         break;
 578       case STATE_INIT_CONNECTION:
 579         DCHECK_EQ(OK, rv);
 580         rv = DoInitConnection();
 581         break;
 582       case STATE_INIT_CONNECTION_COMPLETE:
 583         rv = DoInitConnectionComplete(rv);
 584         break;
 585       case STATE_WAITING_USER_ACTION:
 586         rv = DoWaitingUserAction(rv);
 587         break;
 588       case STATE_RESTART_TUNNEL_AUTH:
 589         DCHECK_EQ(OK, rv);
 590         rv = DoRestartTunnelAuth();
 591         break;
 592       case STATE_RESTART_TUNNEL_AUTH_COMPLETE:
 593         rv = DoRestartTunnelAuthComplete(rv);
 594         break;
 595       case STATE_CREATE_STREAM:
 596         DCHECK_EQ(OK, rv);
 597         rv = DoCreateStream();
 598         break;
 599       case STATE_CREATE_STREAM_COMPLETE:
 600         rv = DoCreateStreamComplete(rv);
 601         break;
 602       default:
 603         NOTREACHED() << "bad state";
 604         rv = ERR_FAILED;
 605         break;
 606     }
 607   } while (rv != ERR_IO_PENDING && next_state_ != STATE_NONE);
 608   return rv;
 609 }
 610
 611 int HttpStreamFactoryImpl::Job::StartInternal() {
 612   CHECK_EQ(STATE_NONE, next_state_);
 613   next_state_ = STATE_START;
 614   int rv = RunLoop(OK);
 615   DCHECK_EQ(ERR_IO_PENDING, rv);
 616   return rv;
 617 }
 618
 619 int HttpStreamFactoryImpl::Job::DoStart() {
 620   origin_ = HostPortPair::FromURL(request_info_.url);
 621   origin_url_ = stream_factory_->ApplyHostMappingRules(
 622       request_info_.url, &origin_);
 623
 624   net_log_.BeginEvent(NetLog::TYPE_HTTP_STREAM_JOB,
 625                       base::Bind(&NetLogHttpStreamJobCallback,
 626                                  &request_info_.url, &origin_url_,
 627                                  priority_));
 628
 629   // Don't connect to restricted ports.
 630   bool is_port_allowed = IsPortAllowedByDefault(origin_.port());
 631   if (request_info_.url.SchemeIs("ftp")) {
 632     // Never share connection with other jobs for FTP requests.
 633     DCHECK(!waiting_job_);
 634
 635     is_port_allowed = IsPortAllowedByFtp(origin_.port());
 636   }
 637   if (!is_port_allowed && !IsPortAllowedByOverride(origin_.port())) {
 638     if (waiting_job_) {
 639       waiting_job_->Resume(this);
 640       waiting_job_ = NULL;
 641     }
 642     return ERR_UNSAFE_PORT;
 643   }
 644
 645   next_state_ = STATE_RESOLVE_PROXY;
 646   return OK;
 647 }
 648
 649 int HttpStreamFactoryImpl::Job::DoResolveProxy() {
 650   DCHECK(!pac_request_);
 651   DCHECK(session_);
 652
 653   next_state_ = STATE_RESOLVE_PROXY_COMPLETE;
 654
 655   if (request_info_.load_flags & LOAD_BYPASS_PROXY) {
 656     proxy_info_.UseDirect();
 657     return OK;
 658   }
 659
 660   return session_->proxy_service()->ResolveProxy(
 661       request_info_.url, request_info_.load_flags, &proxy_info_, io_callback_,
 662       &pac_request_, session_->network_delegate(), net_log_);
 663 }
 664
 665 int HttpStreamFactoryImpl::Job::DoResolveProxyComplete(int result) {
 666   pac_request_ = NULL;
 667
 668   if (result == OK) {
 669     // Remove unsupported proxies from the list.
 670     int supported_proxies =
 671         ProxyServer::SCHEME_DIRECT | ProxyServer::SCHEME_HTTP |
 672         ProxyServer::SCHEME_HTTPS | ProxyServer::SCHEME_SOCKS4 |
 673         ProxyServer::SCHEME_SOCKS5;
 674
 675     if (session_->params().enable_quic_for_proxies)
 676       supported_proxies |= ProxyServer::SCHEME_QUIC;
 677
 678     proxy_info_.RemoveProxiesWithoutScheme(supported_proxies);
 679
 680     if (proxy_info_.is_empty()) {
 681       // No proxies/direct to choose from. This happens when we don't support
 682       // any of the proxies in the returned list.
 683       result = ERR_NO_SUPPORTED_PROXIES;
 684     } else if (using_quic_ &&
 685                (!proxy_info_.is_quic() && !proxy_info_.is_direct())) {
 686       // QUIC can not be spoken to non-QUIC proxies.  This error should not be
 687       // user visible, because the non-alternate job should be resumed.
 688       result = ERR_NO_SUPPORTED_PROXIES;
 689     }
 690   }
 691
 692   if (result != OK) {
 693     if (waiting_job_) {
 694       waiting_job_->Resume(this);
 695       waiting_job_ = NULL;
 696     }
 697     return result;
 698   }
 699
 700   if (blocking_job_)
 701     next_state_ = STATE_WAIT_FOR_JOB;
 702   else
 703     next_state_ = STATE_INIT_CONNECTION;
 704   return OK;
 705 }
 706
 707 bool HttpStreamFactoryImpl::Job::ShouldForceSpdySSL() const {
 708   bool rv = session_->params().force_spdy_always &&
 709       session_->params().force_spdy_over_ssl;
 710   return rv && !session_->HasSpdyExclusion(origin_);
 711 }
 712
 713 bool HttpStreamFactoryImpl::Job::ShouldForceSpdyWithoutSSL() const {
 714   bool rv = session_->params().force_spdy_always &&
 715       !session_->params().force_spdy_over_ssl;
 716   return rv && !session_->HasSpdyExclusion(origin_);
 717 }
 718
 719 bool HttpStreamFactoryImpl::Job::ShouldForceQuic() const {
 720   return session_->params().enable_quic &&
 721     session_->params().origin_to_force_quic_on.Equals(origin_) &&
 722     proxy_info_.is_direct();
 723 }
 724
 725 int HttpStreamFactoryImpl::Job::DoWaitForJob() {
 726   DCHECK(blocking_job_);
 727   next_state_ = STATE_WAIT_FOR_JOB_COMPLETE;
 728   return ERR_IO_PENDING;
 729 }
 730
 731 int HttpStreamFactoryImpl::Job::DoWaitForJobComplete(int result) {
 732   DCHECK(!blocking_job_);
 733   DCHECK_EQ(OK, result);
 734   next_state_ = STATE_INIT_CONNECTION;
 735   return OK;
 736 }
 737
 738 int HttpStreamFactoryImpl::Job::DoInitConnection() {
 739   // TODO(pkasting): Remove ScopedTracker below once crbug.com/462812 is fixed.
 740   tracked_objects::ScopedTracker tracking_profile(
 741       FROM_HERE_WITH_EXPLICIT_FUNCTION(
 742           "462812 HttpStreamFactoryImpl::Job::DoInitConnection"));
 743   DCHECK(!blocking_job_);
 744   DCHECK(!connection_->is_initialized());
 745   DCHECK(proxy_info_.proxy_server().is_valid());
 746   next_state_ = STATE_INIT_CONNECTION_COMPLETE;
 747
 748   using_ssl_ = request_info_.url.SchemeIs("https") ||
 749       request_info_.url.SchemeIs("wss") || ShouldForceSpdySSL();
 750   using_spdy_ = false;
 751
 752   if (ShouldForceQuic())
 753     using_quic_ = true;
 754
 755   DCHECK(!using_quic_ || session_->params().enable_quic);
 756
 757   if (proxy_info_.is_quic()) {
 758     using_quic_ = true;
 759     DCHECK(session_->params().enable_quic_for_proxies);
 760   }
 761
 762   if (using_quic_) {
 763     if (proxy_info_.is_quic() && !request_info_.url.SchemeIs("http")) {
 764       NOTREACHED();
 765       // TODO(rch): support QUIC proxies for HTTPS urls.
 766       return ERR_NOT_IMPLEMENTED;
 767     }
 768     HostPortPair destination = proxy_info_.is_quic() ?
 769         proxy_info_.proxy_server().host_port_pair() : origin_;
 770     next_state_ = STATE_INIT_CONNECTION_COMPLETE;
 771     bool secure_quic = using_ssl_ || proxy_info_.is_quic();
 772     int rv = quic_request_.Request(
 773         destination, secure_quic, request_info_.privacy_mode,
 774         request_info_.method, net_log_, io_callback_);
 775     if (rv == OK) {
 776       using_existing_quic_session_ = true;
 777     } else {
 778       // OK, there's no available QUIC session. Let |waiting_job_| resume
 779       // if it's paused.
 780       if (waiting_job_) {
 781         waiting_job_->Resume(this);
 782         waiting_job_ = NULL;
 783       }
 784     }
 785     return rv;
 786   }
 787
 788   // Check first if we have a spdy session for this group.  If so, then go
 789   // straight to using that.
 790   SpdySessionKey spdy_session_key = GetSpdySessionKey();
 791   base::WeakPtr<SpdySession> spdy_session =
 792       session_->spdy_session_pool()->FindAvailableSession(
 793           spdy_session_key, net_log_);
 794   if (spdy_session && CanUseExistingSpdySession()) {
 795     // If we're preconnecting, but we already have a SpdySession, we don't
 796     // actually need to preconnect any sockets, so we're done.
 797     if (IsPreconnecting())
 798       return OK;
 799     using_spdy_ = true;
 800     next_state_ = STATE_CREATE_STREAM;
 801     existing_spdy_session_ = spdy_session;
 802     return OK;
 803   } else if (request_ && !request_->HasSpdySessionKey() &&
 804              (using_ssl_ || ShouldForceSpdyWithoutSSL())) {
 805     // Update the spdy session key for the request that launched this job.
 806     request_->SetSpdySessionKey(spdy_session_key);
 807   }
 808
 809   // OK, there's no available SPDY session. Let |waiting_job_| resume if it's
 810   // paused.
 811
 812   if (waiting_job_) {
 813     waiting_job_->Resume(this);
 814     waiting_job_ = NULL;
 815   }
 816
 817   if (proxy_info_.is_http() || proxy_info_.is_https())
 818     establishing_tunnel_ = using_ssl_;
 819
 820   bool want_spdy_over_npn = original_url_ != NULL;
 821
 822   if (proxy_info_.is_https()) {
 823     InitSSLConfig(proxy_info_.proxy_server().host_port_pair(),
 824                   &proxy_ssl_config_,
 825                   true /* is a proxy server */);
 826     // Disable revocation checking for HTTPS proxies since the revocation
 827     // requests are probably going to need to go through the proxy too.
 828     proxy_ssl_config_.rev_checking_enabled = false;
 829   }
 830   if (using_ssl_) {
 831     InitSSLConfig(origin_, &server_ssl_config_,
 832                   false /* not a proxy server */);
 833   }
 834
 835   base::WeakPtr<HttpServerProperties> http_server_properties =
 836       session_->http_server_properties();
 837   if (http_server_properties) {
 838     http_server_properties->MaybeForceHTTP11(origin_, &server_ssl_config_);
 839     if (proxy_info_.is_http() || proxy_info_.is_https()) {
 840       http_server_properties->MaybeForceHTTP11(
 841           proxy_info_.proxy_server().host_port_pair(), &proxy_ssl_config_);
 842     }
 843   }
 844
 845   if (IsPreconnecting()) {
 846     DCHECK(!stream_factory_->for_websockets_);
 847     return PreconnectSocketsForHttpRequest(
 848         origin_url_,
 849         request_info_.extra_headers,
 850         request_info_.load_flags,
 851         priority_,
 852         session_,
 853         proxy_info_,
 854         ShouldForceSpdySSL(),
 855         want_spdy_over_npn,
 856         server_ssl_config_,
 857         proxy_ssl_config_,
 858         request_info_.privacy_mode,
 859         net_log_,
 860         num_streams_);
 861   }
 862
 863   // If we can't use a SPDY session, don't both checking for one after
 864   // the hostname is resolved.
 865   OnHostResolutionCallback resolution_callback = CanUseExistingSpdySession() ?
 866       base::Bind(&Job::OnHostResolution, session_->spdy_session_pool(),
 867                  GetSpdySessionKey()) :
 868       OnHostResolutionCallback();
 869   if (stream_factory_->for_websockets_) {
 870     // TODO(ricea): Re-enable NPN when WebSockets over SPDY is supported.
 871     SSLConfig websocket_server_ssl_config = server_ssl_config_;
 872     websocket_server_ssl_config.next_protos.clear();
 873     return InitSocketHandleForWebSocketRequest(
 874         origin_url_, request_info_.extra_headers, request_info_.load_flags,
 875         priority_, session_, proxy_info_, ShouldForceSpdySSL(),
 876         want_spdy_over_npn, websocket_server_ssl_config, proxy_ssl_config_,
 877         request_info_.privacy_mode, net_log_,
 878         connection_.get(), resolution_callback, io_callback_);
 879   }
 880
 881   return InitSocketHandleForHttpRequest(
 882       origin_url_, request_info_.extra_headers, request_info_.load_flags,
 883       priority_, session_, proxy_info_, ShouldForceSpdySSL(),
 884       want_spdy_over_npn, server_ssl_config_, proxy_ssl_config_,
 885       request_info_.privacy_mode, net_log_,
 886       connection_.get(), resolution_callback, io_callback_);
 887 }
 888
 889 int HttpStreamFactoryImpl::Job::DoInitConnectionComplete(int result) {
 890   if (IsPreconnecting()) {
 891     if (using_quic_)
 892       return result;
 893     DCHECK_EQ(OK, result);
 894     return OK;
 895   }
 896
 897   if (result == ERR_SPDY_SESSION_ALREADY_EXISTS) {
 898     // We found a SPDY connection after resolving the host.  This is
 899     // probably an IP pooled connection.
 900     SpdySessionKey spdy_session_key = GetSpdySessionKey();
 901     existing_spdy_session_ =
 902         session_->spdy_session_pool()->FindAvailableSession(
 903             spdy_session_key, net_log_);
 904     if (existing_spdy_session_) {
 905       using_spdy_ = true;
 906       next_state_ = STATE_CREATE_STREAM;
 907     } else {
 908       // It is possible that the spdy session no longer exists.
 909       ReturnToStateInitConnection(true /* close connection */);
 910     }
 911     return OK;
 912   }
 913
 914   if (proxy_info_.is_quic() && using_quic_ &&
 915       (result == ERR_QUIC_PROTOCOL_ERROR ||
 916        result == ERR_QUIC_HANDSHAKE_FAILED)) {
 917     using_quic_ = false;
 918     return ReconsiderProxyAfterError(result);
 919   }
 920
 921   // TODO(willchan): Make this a bit more exact. Maybe there are recoverable
 922   // errors, such as ignoring certificate errors for Alternate-Protocol.
 923   if (result < 0 && waiting_job_) {
 924     waiting_job_->Resume(this);
 925     waiting_job_ = NULL;
 926   }
 927
 928   // |result| may be the result of any of the stacked pools. The following
 929   // logic is used when determining how to interpret an error.
 930   // If |result| < 0:
 931   //   and connection_->socket() != NULL, then the SSL handshake ran and it
 932   //     is a potentially recoverable error.
 933   //   and connection_->socket == NULL and connection_->is_ssl_error() is true,
 934   //     then the SSL handshake ran with an unrecoverable error.
 935   //   otherwise, the error came from one of the other pools.
 936   bool ssl_started = using_ssl_ && (result == OK || connection_->socket() ||
 937                                     connection_->is_ssl_error());
 938
 939   if (ssl_started && (result == OK || IsCertificateError(result))) {
 940     if (using_quic_ && result == OK) {
 941       was_npn_negotiated_ = true;
 942       NextProto protocol_negotiated =
 943           SSLClientSocket::NextProtoFromString("quic/1+spdy/3");
 944       protocol_negotiated_ = protocol_negotiated;
 945     } else {
 946       SSLClientSocket* ssl_socket =
 947           static_cast<SSLClientSocket*>(connection_->socket());
 948       if (ssl_socket->WasNpnNegotiated()) {
 949         was_npn_negotiated_ = true;
 950         std::string proto;
 951         SSLClientSocket::NextProtoStatus status =
 952             ssl_socket->GetNextProto(&proto);
 953         NextProto protocol_negotiated =
 954             SSLClientSocket::NextProtoFromString(proto);
 955         protocol_negotiated_ = protocol_negotiated;
 956         net_log_.AddEvent(
 957             NetLog::TYPE_HTTP_STREAM_REQUEST_PROTO,
 958             base::Bind(&NetLogHttpStreamProtoCallback,
 959                        status, &proto));
 960         if (ssl_socket->was_spdy_negotiated())
 961           SwitchToSpdyMode();
 962       }
 963       if (ShouldForceSpdySSL())
 964         SwitchToSpdyMode();
 965     }
 966   } else if (proxy_info_.is_https() && connection_->socket() &&
 967         result == OK) {
 968     ProxyClientSocket* proxy_socket =
 969       static_cast<ProxyClientSocket*>(connection_->socket());
 970     if (proxy_socket->IsUsingSpdy()) {
 971       was_npn_negotiated_ = true;
 972       protocol_negotiated_ = proxy_socket->GetProtocolNegotiated();
 973       SwitchToSpdyMode();
 974     }
 975   }
 976
 977   // We may be using spdy without SSL
 978   if (ShouldForceSpdyWithoutSSL())
 979     SwitchToSpdyMode();
 980
 981   if (result == ERR_PROXY_AUTH_REQUESTED ||
 982       result == ERR_HTTPS_PROXY_TUNNEL_RESPONSE) {
 983     DCHECK(!ssl_started);
 984     // Other state (i.e. |using_ssl_|) suggests that |connection_| will have an
 985     // SSL socket, but there was an error before that could happen.  This
 986     // puts the in progress HttpProxy socket into |connection_| in order to
 987     // complete the auth (or read the response body).  The tunnel restart code
 988     // is careful to remove it before returning control to the rest of this
 989     // class.
 990     connection_.reset(connection_->release_pending_http_proxy_connection());
 991     return result;
 992   }
 993
 994   if (!ssl_started && result < 0 && original_url_.get()) {
 995     job_status_ = STATUS_BROKEN;
 996     MaybeMarkAlternateProtocolBroken();
 997     return result;
 998   }
 999
1000   if (using_quic_) {
1001     if (result < 0) {
1002       job_status_ = STATUS_BROKEN;
1003       MaybeMarkAlternateProtocolBroken();
1004       return result;
1005     }
1006     stream_ = quic_request_.ReleaseStream();
1007     next_state_ = STATE_NONE;
1008     return OK;
1009   }
1010
1011   if (result < 0 && !ssl_started)
1012     return ReconsiderProxyAfterError(result);
1013   establishing_tunnel_ = false;
1014
1015   if (connection_->socket()) {
1016     // We officially have a new connection.  Record the type.
1017     if (!connection_->is_reused()) {
1018       ConnectionType type = using_spdy_ ? CONNECTION_SPDY : CONNECTION_HTTP;
1019       UpdateConnectionTypeHistograms(type);
1020     }
1021   }
1022
1023   // Handle SSL errors below.
1024   if (using_ssl_) {
1025     DCHECK(ssl_started);
1026     if (IsCertificateError(result)) {
1027       if (using_spdy_ && original_url_.get() &&
1028           original_url_->SchemeIs("http")) {
1029         // We ignore certificate errors for http over spdy.
1030         spdy_certificate_error_ = result;
1031         result = OK;
1032       } else {
1033         result = HandleCertificateError(result);
1034         if (result == OK && !connection_->socket()->IsConnectedAndIdle()) {
1035           ReturnToStateInitConnection(true /* close connection */);
1036           return result;
1037         }
1038       }
1039     }
1040     if (result < 0)
1041       return result;
1042   }
1043
1044   next_state_ = STATE_CREATE_STREAM;
1045   return OK;
1046 }
1047
1048 int HttpStreamFactoryImpl::Job::DoWaitingUserAction(int result) {
1049   // This state indicates that the stream request is in a partially
1050   // completed state, and we've called back to the delegate for more
1051   // information.
1052
1053   // We're always waiting here for the delegate to call us back.
1054   return ERR_IO_PENDING;
1055 }
1056
1057 int HttpStreamFactoryImpl::Job::SetSpdyHttpStream(
1058     base::WeakPtr<SpdySession> session, bool direct) {
1059   // TODO(ricea): Restore the code for WebSockets over SPDY once it's
1060   // implemented.
1061   if (stream_factory_->for_websockets_)
1062     return ERR_NOT_IMPLEMENTED;
1063
1064   // TODO(willchan): Delete this code, because eventually, the
1065   // HttpStreamFactoryImpl will be creating all the SpdyHttpStreams, since it
1066   // will know when SpdySessions become available.
1067
1068   bool use_relative_url = direct || request_info_.url.SchemeIs("https");
1069   stream_.reset(new SpdyHttpStream(session, use_relative_url));
1070   return OK;
1071 }
1072
1073 int HttpStreamFactoryImpl::Job::DoCreateStream() {
1074   // TODO(pkasting): Remove ScopedTracker below once crbug.com/462811 is fixed.
1075   tracked_objects::ScopedTracker tracking_profile(
1076       FROM_HERE_WITH_EXPLICIT_FUNCTION(
1077           "462811 HttpStreamFactoryImpl::Job::DoCreateStream"));
1078   DCHECK(connection_->socket() || existing_spdy_session_.get() || using_quic_);
1079
1080   next_state_ = STATE_CREATE_STREAM_COMPLETE;
1081
1082   // We only set the socket motivation if we're the first to use
1083   // this socket.  Is there a race for two SPDY requests?  We really
1084   // need to plumb this through to the connect level.
1085   if (connection_->socket() && !connection_->is_reused())
1086     SetSocketMotivation();
1087
1088   if (!using_spdy_) {
1089     // We may get ftp scheme when fetching ftp resources through proxy.
1090     bool using_proxy = (proxy_info_.is_http() || proxy_info_.is_https()) &&
1091                        (request_info_.url.SchemeIs("http") ||
1092                         request_info_.url.SchemeIs("ftp"));
1093     if (stream_factory_->for_websockets_) {
1094       DCHECK(request_);
1095       DCHECK(request_->websocket_handshake_stream_create_helper());
1096       websocket_stream_.reset(
1097           request_->websocket_handshake_stream_create_helper()
1098               ->CreateBasicStream(connection_.Pass(), using_proxy));
1099     } else {
1100       stream_.reset(new HttpBasicStream(connection_.release(), using_proxy));
1101     }
1102     return OK;
1103   }
1104
1105   CHECK(!stream_.get());
1106
1107   bool direct = true;
1108   const ProxyServer& proxy_server = proxy_info_.proxy_server();
1109   PrivacyMode privacy_mode = request_info_.privacy_mode;
1110   if (IsHttpsProxyAndHttpUrl())
1111     direct = false;
1112
1113   if (existing_spdy_session_.get()) {
1114     // We picked up an existing session, so we don't need our socket.
1115     if (connection_->socket())
1116       connection_->socket()->Disconnect();
1117     connection_->Reset();
1118
1119     int set_result = SetSpdyHttpStream(existing_spdy_session_, direct);
1120     existing_spdy_session_.reset();
1121     return set_result;
1122   }
1123
1124   SpdySessionKey spdy_session_key(origin_, proxy_server, privacy_mode);
1125   if (IsHttpsProxyAndHttpUrl()) {
1126     // If we don't have a direct SPDY session, and we're using an HTTPS
1127     // proxy, then we might have a SPDY session to the proxy.
1128     // We never use privacy mode for connection to proxy server.
1129     spdy_session_key = SpdySessionKey(proxy_server.host_port_pair(),
1130                                       ProxyServer::Direct(),
1131                                       PRIVACY_MODE_DISABLED);
1132   }
1133
1134   SpdySessionPool* spdy_pool = session_->spdy_session_pool();
1135   base::WeakPtr<SpdySession> spdy_session =
1136       spdy_pool->FindAvailableSession(spdy_session_key, net_log_);
1137
1138   if (spdy_session) {
1139     return SetSpdyHttpStream(spdy_session, direct);
1140   }
1141
1142   spdy_session =
1143       spdy_pool->CreateAvailableSessionFromSocket(spdy_session_key,
1144                                                   connection_.Pass(),
1145                                                   net_log_,
1146                                                   spdy_certificate_error_,
1147                                                   using_ssl_);
1148   if (!spdy_session->HasAcceptableTransportSecurity()) {
1149     spdy_session->CloseSessionOnError(
1150         ERR_SPDY_INADEQUATE_TRANSPORT_SECURITY, "");
1151     return ERR_SPDY_INADEQUATE_TRANSPORT_SECURITY;
1152   }
1153
1154   new_spdy_session_ = spdy_session;
1155   spdy_session_direct_ = direct;
1156   const HostPortPair& host_port_pair = spdy_session_key.host_port_pair();
1157   base::WeakPtr<HttpServerProperties> http_server_properties =
1158       session_->http_server_properties();
1159   if (http_server_properties)
1160     http_server_properties->SetSupportsSpdy(host_port_pair, true);
1161
1162   // Create a SpdyHttpStream attached to the session;
1163   // OnNewSpdySessionReadyCallback is not called until an event loop
1164   // iteration later, so if the SpdySession is closed between then, allow
1165   // reuse state from the underlying socket, sampled by SpdyHttpStream,
1166   // bubble up to the request.
1167   return SetSpdyHttpStream(new_spdy_session_, spdy_session_direct_);
1168 }
1169
1170 int HttpStreamFactoryImpl::Job::DoCreateStreamComplete(int result) {
1171   if (result < 0)
1172     return result;
1173
1174   session_->proxy_service()->ReportSuccess(proxy_info_,
1175                                            session_->network_delegate());
1176   next_state_ = STATE_NONE;
1177   return OK;
1178 }
1179
1180 int HttpStreamFactoryImpl::Job::DoRestartTunnelAuth() {
1181   next_state_ = STATE_RESTART_TUNNEL_AUTH_COMPLETE;
1182   ProxyClientSocket* proxy_socket =
1183       static_cast<ProxyClientSocket*>(connection_->socket());
1184   return proxy_socket->RestartWithAuth(io_callback_);
1185 }
1186
1187 int HttpStreamFactoryImpl::Job::DoRestartTunnelAuthComplete(int result) {
1188   if (result == ERR_PROXY_AUTH_REQUESTED)
1189     return result;
1190
1191   if (result == OK) {
1192     // Now that we've got the HttpProxyClientSocket connected.  We have
1193     // to release it as an idle socket into the pool and start the connection
1194     // process from the beginning.  Trying to pass it in with the
1195     // SSLSocketParams might cause a deadlock since params are dispatched
1196     // interchangeably.  This request won't necessarily get this http proxy
1197     // socket, but there will be forward progress.
1198     establishing_tunnel_ = false;
1199     ReturnToStateInitConnection(false /* do not close connection */);
1200     return OK;
1201   }
1202
1203   return ReconsiderProxyAfterError(result);
1204 }
1205
1206 void HttpStreamFactoryImpl::Job::ReturnToStateInitConnection(
1207     bool close_connection) {
1208   if (close_connection && connection_->socket())
1209     connection_->socket()->Disconnect();
1210   connection_->Reset();
1211
1212   if (request_)
1213     request_->RemoveRequestFromSpdySessionRequestMap();
1214
1215   next_state_ = STATE_INIT_CONNECTION;
1216 }
1217
1218 void HttpStreamFactoryImpl::Job::SetSocketMotivation() {
1219   if (request_info_.motivation == HttpRequestInfo::PRECONNECT_MOTIVATED)
1220     connection_->socket()->SetSubresourceSpeculation();
1221   else if (request_info_.motivation == HttpRequestInfo::OMNIBOX_MOTIVATED)
1222     connection_->socket()->SetOmniboxSpeculation();
1223   // TODO(mbelshe): Add other motivations (like EARLY_LOAD_MOTIVATED).
1224 }
1225
1226 bool HttpStreamFactoryImpl::Job::IsHttpsProxyAndHttpUrl() const {
1227   if (!proxy_info_.is_https())
1228     return false;
1229   if (original_url_.get()) {
1230     // We currently only support Alternate-Protocol where the original scheme
1231     // is http.
1232     DCHECK(original_url_->SchemeIs("http"));
1233     return original_url_->SchemeIs("http");
1234   }
1235   return request_info_.url.SchemeIs("http");
1236 }
1237
1238 // Sets several fields of ssl_config for the given origin_server based on the
1239 // proxy info and other factors.
1240 void HttpStreamFactoryImpl::Job::InitSSLConfig(
1241     const HostPortPair& origin_server,
1242     SSLConfig* ssl_config,
1243     bool is_proxy) const {
1244   if (proxy_info_.is_https() && ssl_config->send_client_cert) {
1245     // When connecting through an HTTPS proxy, disable TLS False Start so
1246     // that client authentication errors can be distinguished between those
1247     // originating from the proxy server (ERR_PROXY_CONNECTION_FAILED) and
1248     // those originating from the endpoint (ERR_SSL_PROTOCOL_ERROR /
1249     // ERR_BAD_SSL_CLIENT_AUTH_CERT).
1250     // TODO(rch): This assumes that the HTTPS proxy will only request a
1251     // client certificate during the initial handshake.
1252     // http://crbug.com/59292
1253     ssl_config->false_start_enabled = false;
1254   }
1255
1256   enum {
1257     FALLBACK_NONE = 0,    // SSL version fallback did not occur.
1258     FALLBACK_SSL3 = 1,    // Fell back to SSL 3.0.
1259     FALLBACK_TLS1 = 2,    // Fell back to TLS 1.0.
1260     FALLBACK_TLS1_1 = 3,  // Fell back to TLS 1.1.
1261     FALLBACK_MAX
1262   };
1263
1264   int fallback = FALLBACK_NONE;
1265   if (ssl_config->version_fallback) {
1266     switch (ssl_config->version_max) {
1267       case SSL_PROTOCOL_VERSION_SSL3:
1268         fallback = FALLBACK_SSL3;
1269         break;
1270       case SSL_PROTOCOL_VERSION_TLS1:
1271         fallback = FALLBACK_TLS1;
1272         break;
1273       case SSL_PROTOCOL_VERSION_TLS1_1:
1274         fallback = FALLBACK_TLS1_1;
1275         break;
1276     }
1277   }
1278   UMA_HISTOGRAM_ENUMERATION("Net.ConnectionUsedSSLVersionFallback",
1279                             fallback, FALLBACK_MAX);
1280
1281   // We also wish to measure the amount of fallback connections for a host that
1282   // we know implements TLS up to 1.2. Ideally there would be no fallback here
1283   // but high numbers of SSLv3 would suggest that SSLv3 fallback is being
1284   // caused by network middleware rather than buggy HTTPS servers.
1285   const std::string& host = origin_server.host();
1286   if (!is_proxy &&
1287       host.size() >= 10 &&
1288       host.compare(host.size() - 10, 10, "google.com") == 0 &&
1289       (host.size() == 10 || host[host.size()-11] == '.')) {
1290     UMA_HISTOGRAM_ENUMERATION("Net.GoogleConnectionUsedSSLVersionFallback",
1291                               fallback, FALLBACK_MAX);
1292   }
1293
1294   if (request_info_.load_flags & LOAD_VERIFY_EV_CERT)
1295     ssl_config->verify_ev_cert = true;
1296
1297   // Disable Channel ID if privacy mode is enabled.
1298   if (request_info_.privacy_mode == PRIVACY_MODE_ENABLED)
1299     ssl_config->channel_id_enabled = false;
1300 }
1301
1302
1303 int HttpStreamFactoryImpl::Job::ReconsiderProxyAfterError(int error) {
1304   DCHECK(!pac_request_);
1305   DCHECK(session_);
1306
1307   // A failure to resolve the hostname or any error related to establishing a
1308   // TCP connection could be grounds for trying a new proxy configuration.
1309   //
1310   // Why do this when a hostname cannot be resolved?  Some URLs only make sense
1311   // to proxy servers.  The hostname in those URLs might fail to resolve if we
1312   // are still using a non-proxy config.  We need to check if a proxy config
1313   // now exists that corresponds to a proxy server that could load the URL.
1314   //
1315   switch (error) {
1316     case ERR_PROXY_CONNECTION_FAILED:
1317     case ERR_NAME_NOT_RESOLVED:
1318     case ERR_INTERNET_DISCONNECTED:
1319     case ERR_ADDRESS_UNREACHABLE:
1320     case ERR_CONNECTION_CLOSED:
1321     case ERR_CONNECTION_TIMED_OUT:
1322     case ERR_CONNECTION_RESET:
1323     case ERR_CONNECTION_REFUSED:
1324     case ERR_CONNECTION_ABORTED:
1325     case ERR_TIMED_OUT:
1326     case ERR_TUNNEL_CONNECTION_FAILED:
1327     case ERR_SOCKS_CONNECTION_FAILED:
1328     // This can happen in the case of trying to talk to a proxy using SSL, and
1329     // ending up talking to a captive portal that supports SSL instead.
1330     case ERR_PROXY_CERTIFICATE_INVALID:
1331     // This can happen when trying to talk SSL to a non-SSL server (Like a
1332     // captive portal).
1333     case ERR_QUIC_PROTOCOL_ERROR:
1334     case ERR_QUIC_HANDSHAKE_FAILED:
1335     case ERR_SSL_PROTOCOL_ERROR:
1336       break;
1337     case ERR_SOCKS_CONNECTION_HOST_UNREACHABLE:
1338       // Remap the SOCKS-specific "host unreachable" error to a more
1339       // generic error code (this way consumers like the link doctor
1340       // know to substitute their error page).
1341       //
1342       // Note that if the host resolving was done by the SOCKS5 proxy, we can't
1343       // differentiate between a proxy-side "host not found" versus a proxy-side
1344       // "address unreachable" error, and will report both of these failures as
1345       // ERR_ADDRESS_UNREACHABLE.
1346       return ERR_ADDRESS_UNREACHABLE;
1347     default:
1348       return error;
1349   }
1350
1351   if (request_info_.load_flags & LOAD_BYPASS_PROXY) {
1352     return error;
1353   }
1354
1355   if (proxy_info_.is_https() && proxy_ssl_config_.send_client_cert) {
1356     session_->ssl_client_auth_cache()->Remove(
1357         proxy_info_.proxy_server().host_port_pair());
1358   }
1359
1360   int rv = session_->proxy_service()->ReconsiderProxyAfterError(
1361       request_info_.url, request_info_.load_flags, error, &proxy_info_,
1362       io_callback_, &pac_request_, session_->network_delegate(), net_log_);
1363   if (rv == OK || rv == ERR_IO_PENDING) {
1364     // If the error was during connection setup, there is no socket to
1365     // disconnect.
1366     if (connection_->socket())
1367       connection_->socket()->Disconnect();
1368     connection_->Reset();
1369     if (request_)
1370       request_->RemoveRequestFromSpdySessionRequestMap();
1371     next_state_ = STATE_RESOLVE_PROXY_COMPLETE;
1372   } else {
1373     // If ReconsiderProxyAfterError() failed synchronously, it means
1374     // there was nothing left to fall-back to, so fail the transaction
1375     // with the last connection error we got.
1376     // TODO(eroman): This is a confusing contract, make it more obvious.
1377     rv = error;
1378   }
1379
1380   return rv;
1381 }
1382
1383 int HttpStreamFactoryImpl::Job::HandleCertificateError(int error) {
1384   DCHECK(using_ssl_);
1385   DCHECK(IsCertificateError(error));
1386
1387   SSLClientSocket* ssl_socket =
1388       static_cast<SSLClientSocket*>(connection_->socket());
1389   ssl_socket->GetSSLInfo(&ssl_info_);
1390
1391   // Add the bad certificate to the set of allowed certificates in the
1392   // SSL config object. This data structure will be consulted after calling
1393   // RestartIgnoringLastError(). And the user will be asked interactively
1394   // before RestartIgnoringLastError() is ever called.
1395   SSLConfig::CertAndStatus bad_cert;
1396
1397   // |ssl_info_.cert| may be NULL if we failed to create
1398   // X509Certificate for whatever reason, but normally it shouldn't
1399   // happen, unless this code is used inside sandbox.
1400   if (ssl_info_.cert.get() == NULL ||
1401       !X509Certificate::GetDEREncoded(ssl_info_.cert->os_cert_handle(),
1402                                       &bad_cert.der_cert)) {
1403     return error;
1404   }
1405   bad_cert.cert_status = ssl_info_.cert_status;
1406   server_ssl_config_.allowed_bad_certs.push_back(bad_cert);
1407
1408   int load_flags = request_info_.load_flags;
1409   if (session_->params().ignore_certificate_errors)
1410     load_flags |= LOAD_IGNORE_ALL_CERT_ERRORS;
1411   if (ssl_socket->IgnoreCertError(error, load_flags))
1412     return OK;
1413   return error;
1414 }
1415
1416 void HttpStreamFactoryImpl::Job::SwitchToSpdyMode() {
1417   if (HttpStreamFactory::spdy_enabled())
1418     using_spdy_ = true;
1419 }
1420
1421 bool HttpStreamFactoryImpl::Job::IsPreconnecting() const {
1422   DCHECK_GE(num_streams_, 0);
1423   return num_streams_ > 0;
1424 }
1425
1426 bool HttpStreamFactoryImpl::Job::IsOrphaned() const {
1427   return !IsPreconnecting() && !request_;
1428 }
1429
1430 void HttpStreamFactoryImpl::Job::ReportJobSuccededForRequest() {
1431   if (using_existing_quic_session_) {
1432     // If an existing session was used, then no TCP connection was
1433     // started.
1434     HistogramAlternateProtocolUsage(ALTERNATE_PROTOCOL_USAGE_NO_RACE);
1435   } else if (original_url_) {
1436     // This job was the alternate protocol job, and hence won the race.
1437     HistogramAlternateProtocolUsage(ALTERNATE_PROTOCOL_USAGE_WON_RACE);
1438   } else {
1439     // This job was the normal job, and hence the alternate protocol job lost
1440     // the race.
1441     HistogramAlternateProtocolUsage(ALTERNATE_PROTOCOL_USAGE_LOST_RACE);
1442   }
1443 }
1444
1445 void HttpStreamFactoryImpl::Job::MarkOtherJobComplete(const Job& job) {
1446   DCHECK_EQ(STATUS_RUNNING, other_job_status_);
1447   other_job_status_ = job.job_status_;
1448   other_job_alternative_service_ = job.alternative_service_;
1449   MaybeMarkAlternateProtocolBroken();
1450 }
1451
1452 void HttpStreamFactoryImpl::Job::MaybeMarkAlternateProtocolBroken() {
1453   if (job_status_ == STATUS_RUNNING || other_job_status_ == STATUS_RUNNING)
1454     return;
1455
1456   bool is_alternate_protocol_job = original_url_.get() != NULL;
1457   if (is_alternate_protocol_job) {
1458     if (job_status_ == STATUS_BROKEN && other_job_status_ == STATUS_SUCCEEDED) {
1459       HistogramBrokenAlternateProtocolLocation(
1460           BROKEN_ALTERNATE_PROTOCOL_LOCATION_HTTP_STREAM_FACTORY_IMPL_JOB_ALT);
1461       session_->http_server_properties()->MarkAlternativeServiceBroken(
1462           alternative_service_);
1463     }
1464     return;
1465   }
1466
1467   if (job_status_ == STATUS_SUCCEEDED && other_job_status_ == STATUS_BROKEN) {
1468     HistogramBrokenAlternateProtocolLocation(
1469         BROKEN_ALTERNATE_PROTOCOL_LOCATION_HTTP_STREAM_FACTORY_IMPL_JOB_MAIN);
1470     session_->http_server_properties()->MarkAlternativeServiceBroken(
1471         other_job_alternative_service_);
1472   }
1473 }
1474
1475 }  // namespace net