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/metrics/histogram_macros.h"
  14 #include "base/profiler/scoped_tracker.h"
  15 #include "base/stl_util.h"
  16 #include "base/strings/string_number_conversions.h"
  17 #include "base/strings/string_util.h"
  18 #include "base/strings/stringprintf.h"
  19 #include "base/values.h"
  20 #include "build/build_config.h"
  21 #include "net/base/connection_type_histograms.h"
  22 #include "net/base/net_util.h"
  23 #include "net/http/http_basic_stream.h"
  24 #include "net/http/http_network_session.h"
  25 #include "net/http/http_proxy_client_socket.h"
  26 #include "net/http/http_proxy_client_socket_pool.h"
  27 #include "net/http/http_request_info.h"
  28 #include "net/http/http_server_properties.h"
  29 #include "net/http/http_stream_factory.h"
  30 #include "net/http/http_stream_factory_impl_request.h"
  31 #include "net/log/net_log.h"
  32 #include "net/quic/quic_http_stream.h"
  33 #include "net/socket/client_socket_handle.h"
  34 #include "net/socket/client_socket_pool.h"
  35 #include "net/socket/client_socket_pool_manager.h"
  36 #include "net/socket/socks_client_socket_pool.h"
  37 #include "net/socket/ssl_client_socket.h"
  38 #include "net/socket/ssl_client_socket_pool.h"
  39 #include "net/spdy/spdy_http_stream.h"
  40 #include "net/spdy/spdy_session.h"
  41 #include "net/spdy/spdy_session_pool.h"
  42 #include "net/ssl/ssl_cert_request_info.h"
  43
  44 namespace net {
  45
  46 // Returns parameters associated with the start of a HTTP stream job.
  47 base::Value* NetLogHttpStreamJobCallback(
  48     const GURL* original_url,
  49     const GURL* url,
  50     const AlternativeService* alternative_service,
  51     RequestPriority priority,
  52     NetLogCaptureMode /* capture_mode */) {
  53   base::DictionaryValue* dict = new base::DictionaryValue();
  54   dict->SetString("original_url", original_url->GetOrigin().spec());
  55   dict->SetString("url", url->GetOrigin().spec());
  56   dict->SetString("alternative_service", alternative_service->ToString());
  57   dict->SetString("priority", RequestPriorityToString(priority));
  58   return dict;
  59 }
  60
  61 // Returns parameters associated with the Proto (with NPN negotiation) of a HTTP
  62 // stream.
  63 base::Value* NetLogHttpStreamProtoCallback(
  64     const SSLClientSocket::NextProtoStatus status,
  65     const std::string* proto,
  66     NetLogCaptureMode /* capture_mode */) {
  67   base::DictionaryValue* dict = new base::DictionaryValue();
  68
  69   dict->SetString("next_proto_status",
  70                   SSLClientSocket::NextProtoStatusToString(status));
  71   dict->SetString("proto", *proto);
  72   return dict;
  73 }
  74
  75 HttpStreamFactoryImpl::Job::Job(HttpStreamFactoryImpl* stream_factory,
  76                                 HttpNetworkSession* session,
  77                                 const HttpRequestInfo& request_info,
  78                                 RequestPriority priority,
  79                                 const SSLConfig& server_ssl_config,
  80                                 const SSLConfig& proxy_ssl_config,
  81                                 NetLog* net_log)
  82     : request_(NULL),
  83       request_info_(request_info),
  84       priority_(priority),
  85       server_ssl_config_(server_ssl_config),
  86       proxy_ssl_config_(proxy_ssl_config),
  87       net_log_(BoundNetLog::Make(net_log, NetLog::SOURCE_HTTP_STREAM_JOB)),
  88       io_callback_(base::Bind(&Job::OnIOComplete, base::Unretained(this))),
  89       connection_(new ClientSocketHandle),
  90       session_(session),
  91       stream_factory_(stream_factory),
  92       next_state_(STATE_NONE),
  93       pac_request_(NULL),
  94       blocking_job_(NULL),
  95       waiting_job_(NULL),
  96       using_ssl_(false),
  97       using_spdy_(false),
  98       using_quic_(false),
  99       quic_request_(session_->quic_stream_factory()),
 100       using_existing_quic_session_(false),
 101       spdy_certificate_error_(OK),
 102       establishing_tunnel_(false),
 103       was_npn_negotiated_(false),
 104       protocol_negotiated_(kProtoUnknown),
 105       num_streams_(0),
 106       spdy_session_direct_(false),
 107       job_status_(STATUS_RUNNING),
 108       other_job_status_(STATUS_RUNNING),
 109       ptr_factory_(this) {
 110   DCHECK(stream_factory);
 111   DCHECK(session);
 112 }
 113
 114 HttpStreamFactoryImpl::Job::~Job() {
 115   net_log_.EndEvent(NetLog::TYPE_HTTP_STREAM_JOB);
 116
 117   // When we're in a partially constructed state, waiting for the user to
 118   // provide certificate handling information or authentication, we can't reuse
 119   // this stream at all.
 120   if (next_state_ == STATE_WAITING_USER_ACTION) {
 121     connection_->socket()->Disconnect();
 122     connection_.reset();
 123   }
 124
 125   if (pac_request_)
 126     session_->proxy_service()->CancelPacRequest(pac_request_);
 127
 128   // The stream could be in a partial state.  It is not reusable.
 129   if (stream_.get() && next_state_ != STATE_DONE)
 130     stream_->Close(true /* not reusable */);
 131 }
 132
 133 void HttpStreamFactoryImpl::Job::Start(Request* request) {
 134   DCHECK(request);
 135   request_ = request;
 136   StartInternal();
 137 }
 138
 139 int HttpStreamFactoryImpl::Job::Preconnect(int num_streams) {
 140   DCHECK_GT(num_streams, 0);
 141   base::WeakPtr<HttpServerProperties> http_server_properties =
 142       session_->http_server_properties();
 143   if (http_server_properties &&
 144       http_server_properties->SupportsRequestPriority(
 145           HostPortPair::FromURL(request_info_.url))) {
 146     num_streams_ = 1;
 147   } else {
 148     num_streams_ = num_streams;
 149   }
 150   return StartInternal();
 151 }
 152
 153 int HttpStreamFactoryImpl::Job::RestartTunnelWithProxyAuth(
 154     const AuthCredentials& credentials) {
 155   DCHECK(establishing_tunnel_);
 156   next_state_ = STATE_RESTART_TUNNEL_AUTH;
 157   stream_.reset();
 158   return RunLoop(OK);
 159 }
 160
 161 LoadState HttpStreamFactoryImpl::Job::GetLoadState() const {
 162   switch (next_state_) {
 163     case STATE_RESOLVE_PROXY_COMPLETE:
 164       return session_->proxy_service()->GetLoadState(pac_request_);
 165     case STATE_INIT_CONNECTION_COMPLETE:
 166     case STATE_CREATE_STREAM_COMPLETE:
 167       return using_quic_ ? LOAD_STATE_CONNECTING : connection_->GetLoadState();
 168     default:
 169       return LOAD_STATE_IDLE;
 170   }
 171 }
 172
 173 void HttpStreamFactoryImpl::Job::MarkAsAlternate(
 174     AlternativeService alternative_service) {
 175   DCHECK(!IsAlternate());
 176   alternative_service_ = alternative_service;
 177   if (alternative_service.protocol == QUIC) {
 178     DCHECK(session_->params().enable_quic);
 179     using_quic_ = true;
 180   }
 181 }
 182
 183 void HttpStreamFactoryImpl::Job::WaitFor(Job* job) {
 184   DCHECK_EQ(STATE_NONE, next_state_);
 185   DCHECK_EQ(STATE_NONE, job->next_state_);
 186   DCHECK(!blocking_job_);
 187   DCHECK(!job->waiting_job_);
 188   blocking_job_ = job;
 189   job->waiting_job_ = this;
 190 }
 191
 192 void HttpStreamFactoryImpl::Job::Resume(Job* job) {
 193   DCHECK_EQ(blocking_job_, job);
 194   blocking_job_ = NULL;
 195
 196   // We know we're blocked if the next_state_ is STATE_WAIT_FOR_JOB_COMPLETE.
 197   // Unblock |this|.
 198   if (next_state_ == STATE_WAIT_FOR_JOB_COMPLETE) {
 199     base::MessageLoop::current()->PostTask(
 200         FROM_HERE,
 201         base::Bind(&HttpStreamFactoryImpl::Job::OnIOComplete,
 202                    ptr_factory_.GetWeakPtr(), OK));
 203   }
 204 }
 205
 206 void HttpStreamFactoryImpl::Job::Orphan(const Request* request) {
 207   DCHECK_EQ(request_, request);
 208   request_ = NULL;
 209   if (blocking_job_) {
 210     // We've been orphaned, but there's a job we're blocked on. Don't bother
 211     // racing, just cancel ourself.
 212     DCHECK(blocking_job_->waiting_job_);
 213     blocking_job_->waiting_job_ = NULL;
 214     blocking_job_ = NULL;
 215     if (stream_factory_->for_websockets_ &&
 216         connection_ && connection_->socket()) {
 217       connection_->socket()->Disconnect();
 218     }
 219     stream_factory_->OnOrphanedJobComplete(this);
 220   } else if (stream_factory_->for_websockets_) {
 221     // We cancel this job because a WebSocketHandshakeStream can't be created
 222     // without a WebSocketHandshakeStreamBase::CreateHelper which is stored in
 223     // the Request class and isn't accessible from this job.
 224     if (connection_ && connection_->socket()) {
 225       connection_->socket()->Disconnect();
 226     }
 227     stream_factory_->OnOrphanedJobComplete(this);
 228   }
 229 }
 230
 231 void HttpStreamFactoryImpl::Job::SetPriority(RequestPriority priority) {
 232   priority_ = priority;
 233   // TODO(akalin): Propagate this to |connection_| and maybe the
 234   // preconnect state.
 235 }
 236
 237 bool HttpStreamFactoryImpl::Job::was_npn_negotiated() const {
 238   return was_npn_negotiated_;
 239 }
 240
 241 NextProto HttpStreamFactoryImpl::Job::protocol_negotiated() const {
 242   return protocol_negotiated_;
 243 }
 244
 245 bool HttpStreamFactoryImpl::Job::using_spdy() const {
 246   return using_spdy_;
 247 }
 248
 249 const SSLConfig& HttpStreamFactoryImpl::Job::server_ssl_config() const {
 250   return server_ssl_config_;
 251 }
 252
 253 const SSLConfig& HttpStreamFactoryImpl::Job::proxy_ssl_config() const {
 254   return proxy_ssl_config_;
 255 }
 256
 257 const ProxyInfo& HttpStreamFactoryImpl::Job::proxy_info() const {
 258   return proxy_info_;
 259 }
 260
 261 void HttpStreamFactoryImpl::Job::GetSSLInfo() {
 262   DCHECK(using_ssl_);
 263   DCHECK(!establishing_tunnel_);
 264   DCHECK(connection_.get() && connection_->socket());
 265   SSLClientSocket* ssl_socket =
 266       static_cast<SSLClientSocket*>(connection_->socket());
 267   ssl_socket->GetSSLInfo(&ssl_info_);
 268 }
 269
 270 SpdySessionKey HttpStreamFactoryImpl::Job::GetSpdySessionKey() const {
 271   // In the case that we're using an HTTPS proxy for an HTTP url,
 272   // we look for a SPDY session *to* the proxy, instead of to the
 273   // origin server.
 274   if (IsHttpsProxyAndHttpUrl()) {
 275     return SpdySessionKey(proxy_info_.proxy_server().host_port_pair(),
 276                           ProxyServer::Direct(), PRIVACY_MODE_DISABLED);
 277   }
 278   return SpdySessionKey(server_, proxy_info_.proxy_server(),
 279                         request_info_.privacy_mode);
 280 }
 281
 282 bool HttpStreamFactoryImpl::Job::CanUseExistingSpdySession() const {
 283   // We need to make sure that if a spdy session was created for
 284   // https://somehost/ that we don't use that session for http://somehost:443/.
 285   // The only time we can use an existing session is if the request URL is
 286   // https (the normal case) or if we're connection to a SPDY proxy.
 287   // https://crbug.com/133176
 288   // TODO(ricea): Add "wss" back to this list when SPDY WebSocket support is
 289   // working.
 290   return origin_url_.SchemeIs("https") ||
 291          proxy_info_.proxy_server().is_https() || IsSpdyAlternate();
 292 }
 293
 294 void HttpStreamFactoryImpl::Job::OnStreamReadyCallback() {
 295   DCHECK(stream_.get());
 296   DCHECK(!IsPreconnecting());
 297   DCHECK(!stream_factory_->for_websockets_);
 298   if (IsOrphaned()) {
 299     stream_factory_->OnOrphanedJobComplete(this);
 300   } else {
 301     request_->Complete(was_npn_negotiated(),
 302                        protocol_negotiated(),
 303                        using_spdy(),
 304                        net_log_);
 305     request_->OnStreamReady(this, server_ssl_config_, proxy_info_,
 306                             stream_.release());
 307   }
 308   // |this| may be deleted after this call.
 309 }
 310
 311 void HttpStreamFactoryImpl::Job::OnWebSocketHandshakeStreamReadyCallback() {
 312   DCHECK(websocket_stream_);
 313   DCHECK(!IsPreconnecting());
 314   DCHECK(stream_factory_->for_websockets_);
 315   // An orphaned WebSocket job will be closed immediately and
 316   // never be ready.
 317   DCHECK(!IsOrphaned());
 318   request_->Complete(was_npn_negotiated(),
 319                      protocol_negotiated(),
 320                      using_spdy(),
 321                      net_log_);
 322   request_->OnWebSocketHandshakeStreamReady(this,
 323                                             server_ssl_config_,
 324                                             proxy_info_,
 325                                             websocket_stream_.release());
 326   // |this| may be deleted after this call.
 327 }
 328
 329 void HttpStreamFactoryImpl::Job::OnNewSpdySessionReadyCallback() {
 330   DCHECK(stream_.get());
 331   DCHECK(!IsPreconnecting());
 332   DCHECK(using_spdy());
 333   // Note: an event loop iteration has passed, so |new_spdy_session_| may be
 334   // NULL at this point if the SpdySession closed immediately after creation.
 335   base::WeakPtr<SpdySession> spdy_session = new_spdy_session_;
 336   new_spdy_session_.reset();
 337
 338   // TODO(jgraettinger): Notify the factory, and let that notify |request_|,
 339   // rather than notifying |request_| directly.
 340   if (IsOrphaned()) {
 341     if (spdy_session) {
 342       stream_factory_->OnNewSpdySessionReady(
 343           spdy_session, spdy_session_direct_, server_ssl_config_, proxy_info_,
 344           was_npn_negotiated(), protocol_negotiated(), using_spdy(), net_log_);
 345     }
 346     stream_factory_->OnOrphanedJobComplete(this);
 347   } else {
 348     request_->OnNewSpdySessionReady(
 349         this, stream_.Pass(), spdy_session, spdy_session_direct_);
 350   }
 351   // |this| may be deleted after this call.
 352 }
 353
 354 void HttpStreamFactoryImpl::Job::OnStreamFailedCallback(int result) {
 355   DCHECK(!IsPreconnecting());
 356   if (IsOrphaned())
 357     stream_factory_->OnOrphanedJobComplete(this);
 358   else
 359     request_->OnStreamFailed(this, result, server_ssl_config_);
 360   // |this| may be deleted after this call.
 361 }
 362
 363 void HttpStreamFactoryImpl::Job::OnCertificateErrorCallback(
 364     int result, const SSLInfo& ssl_info) {
 365   DCHECK(!IsPreconnecting());
 366   if (IsOrphaned())
 367     stream_factory_->OnOrphanedJobComplete(this);
 368   else
 369     request_->OnCertificateError(this, result, server_ssl_config_, ssl_info);
 370   // |this| may be deleted after this call.
 371 }
 372
 373 void HttpStreamFactoryImpl::Job::OnNeedsProxyAuthCallback(
 374     const HttpResponseInfo& response,
 375     HttpAuthController* auth_controller) {
 376   DCHECK(!IsPreconnecting());
 377   if (IsOrphaned())
 378     stream_factory_->OnOrphanedJobComplete(this);
 379   else
 380     request_->OnNeedsProxyAuth(
 381         this, response, server_ssl_config_, proxy_info_, auth_controller);
 382   // |this| may be deleted after this call.
 383 }
 384
 385 void HttpStreamFactoryImpl::Job::OnNeedsClientAuthCallback(
 386     SSLCertRequestInfo* cert_info) {
 387   DCHECK(!IsPreconnecting());
 388   if (IsOrphaned())
 389     stream_factory_->OnOrphanedJobComplete(this);
 390   else
 391     request_->OnNeedsClientAuth(this, server_ssl_config_, cert_info);
 392   // |this| may be deleted after this call.
 393 }
 394
 395 void HttpStreamFactoryImpl::Job::OnHttpsProxyTunnelResponseCallback(
 396     const HttpResponseInfo& response_info,
 397     HttpStream* stream) {
 398   DCHECK(!IsPreconnecting());
 399   if (IsOrphaned())
 400     stream_factory_->OnOrphanedJobComplete(this);
 401   else
 402     request_->OnHttpsProxyTunnelResponse(
 403         this, response_info, server_ssl_config_, proxy_info_, stream);
 404   // |this| may be deleted after this call.
 405 }
 406
 407 void HttpStreamFactoryImpl::Job::OnPreconnectsComplete() {
 408   DCHECK(!request_);
 409   if (new_spdy_session_.get()) {
 410     stream_factory_->OnNewSpdySessionReady(new_spdy_session_,
 411                                            spdy_session_direct_,
 412                                            server_ssl_config_,
 413                                            proxy_info_,
 414                                            was_npn_negotiated(),
 415                                            protocol_negotiated(),
 416                                            using_spdy(),
 417                                            net_log_);
 418   }
 419   stream_factory_->OnPreconnectsComplete(this);
 420   // |this| may be deleted after this call.
 421 }
 422
 423 // static
 424 int HttpStreamFactoryImpl::Job::OnHostResolution(
 425     SpdySessionPool* spdy_session_pool,
 426     const SpdySessionKey& spdy_session_key,
 427     const AddressList& addresses,
 428     const BoundNetLog& net_log) {
 429   // It is OK to dereference spdy_session_pool, because the
 430   // ClientSocketPoolManager will be destroyed in the same callback that
 431   // destroys the SpdySessionPool.
 432   return
 433       spdy_session_pool->FindAvailableSession(spdy_session_key, net_log) ?
 434       ERR_SPDY_SESSION_ALREADY_EXISTS : OK;
 435 }
 436
 437 void HttpStreamFactoryImpl::Job::OnIOComplete(int result) {
 438   // TODO(pkasting): Remove ScopedTracker below once crbug.com/455884 is fixed.
 439   tracked_objects::ScopedTracker tracking_profile(
 440       FROM_HERE_WITH_EXPLICIT_FUNCTION(
 441           "455884 HttpStreamFactoryImpl::Job::OnIOComplete"));
 442   RunLoop(result);
 443 }
 444
 445 int HttpStreamFactoryImpl::Job::RunLoop(int result) {
 446   result = DoLoop(result);
 447
 448   if (result == ERR_IO_PENDING)
 449     return result;
 450
 451   // If there was an error, we should have already resumed the |waiting_job_|,
 452   // if there was one.
 453   DCHECK(result == OK || waiting_job_ == NULL);
 454
 455   if (IsPreconnecting()) {
 456     base::MessageLoop::current()->PostTask(
 457         FROM_HERE,
 458         base::Bind(&HttpStreamFactoryImpl::Job::OnPreconnectsComplete,
 459                    ptr_factory_.GetWeakPtr()));
 460     return ERR_IO_PENDING;
 461   }
 462
 463   if (IsCertificateError(result)) {
 464     // Retrieve SSL information from the socket.
 465     GetSSLInfo();
 466
 467     next_state_ = STATE_WAITING_USER_ACTION;
 468     base::MessageLoop::current()->PostTask(
 469         FROM_HERE,
 470         base::Bind(&HttpStreamFactoryImpl::Job::OnCertificateErrorCallback,
 471                    ptr_factory_.GetWeakPtr(), result, ssl_info_));
 472     return ERR_IO_PENDING;
 473   }
 474
 475   switch (result) {
 476     case ERR_PROXY_AUTH_REQUESTED: {
 477       UMA_HISTOGRAM_BOOLEAN("Net.ProxyAuthRequested.HasConnection",
 478                             connection_.get() != NULL);
 479       if (!connection_.get())
 480         return ERR_PROXY_AUTH_REQUESTED_WITH_NO_CONNECTION;
 481       CHECK(connection_->socket());
 482       CHECK(establishing_tunnel_);
 483
 484       next_state_ = STATE_WAITING_USER_ACTION;
 485       ProxyClientSocket* proxy_socket =
 486           static_cast<ProxyClientSocket*>(connection_->socket());
 487       base::MessageLoop::current()->PostTask(
 488           FROM_HERE,
 489           base::Bind(&Job::OnNeedsProxyAuthCallback, ptr_factory_.GetWeakPtr(),
 490                      *proxy_socket->GetConnectResponseInfo(),
 491                      proxy_socket->GetAuthController()));
 492       return ERR_IO_PENDING;
 493     }
 494
 495     case ERR_SSL_CLIENT_AUTH_CERT_NEEDED:
 496       base::MessageLoop::current()->PostTask(
 497           FROM_HERE,
 498           base::Bind(&Job::OnNeedsClientAuthCallback, ptr_factory_.GetWeakPtr(),
 499                      connection_->ssl_error_response_info().cert_request_info));
 500       return ERR_IO_PENDING;
 501
 502     case ERR_HTTPS_PROXY_TUNNEL_RESPONSE: {
 503       DCHECK(connection_.get());
 504       DCHECK(connection_->socket());
 505       DCHECK(establishing_tunnel_);
 506
 507       ProxyClientSocket* proxy_socket =
 508           static_cast<ProxyClientSocket*>(connection_->socket());
 509       base::MessageLoop::current()->PostTask(
 510           FROM_HERE,
 511           base::Bind(&Job::OnHttpsProxyTunnelResponseCallback,
 512                      ptr_factory_.GetWeakPtr(),
 513                      *proxy_socket->GetConnectResponseInfo(),
 514                      proxy_socket->CreateConnectResponseStream()));
 515       return ERR_IO_PENDING;
 516     }
 517
 518     case OK:
 519       job_status_ = STATUS_SUCCEEDED;
 520       MaybeMarkAlternativeServiceBroken();
 521       next_state_ = STATE_DONE;
 522       if (new_spdy_session_.get()) {
 523         base::MessageLoop::current()->PostTask(
 524             FROM_HERE,
 525             base::Bind(&Job::OnNewSpdySessionReadyCallback,
 526                        ptr_factory_.GetWeakPtr()));
 527       } else if (stream_factory_->for_websockets_) {
 528         DCHECK(websocket_stream_);
 529         base::MessageLoop::current()->PostTask(
 530             FROM_HERE,
 531             base::Bind(&Job::OnWebSocketHandshakeStreamReadyCallback,
 532                        ptr_factory_.GetWeakPtr()));
 533       } else {
 534         DCHECK(stream_.get());
 535         base::MessageLoop::current()->PostTask(
 536             FROM_HERE,
 537             base::Bind(&Job::OnStreamReadyCallback, ptr_factory_.GetWeakPtr()));
 538       }
 539       return ERR_IO_PENDING;
 540
 541     default:
 542       if (job_status_ != STATUS_BROKEN) {
 543         DCHECK_EQ(STATUS_RUNNING, job_status_);
 544         job_status_ = STATUS_FAILED;
 545         MaybeMarkAlternativeServiceBroken();
 546       }
 547       base::MessageLoop::current()->PostTask(
 548           FROM_HERE,
 549           base::Bind(&Job::OnStreamFailedCallback, ptr_factory_.GetWeakPtr(),
 550                      result));
 551       return ERR_IO_PENDING;
 552   }
 553 }
 554
 555 int HttpStreamFactoryImpl::Job::DoLoop(int result) {
 556   DCHECK_NE(next_state_, STATE_NONE);
 557   int rv = result;
 558   do {
 559     State state = next_state_;
 560     next_state_ = STATE_NONE;
 561     switch (state) {
 562       case STATE_START:
 563         DCHECK_EQ(OK, rv);
 564         rv = DoStart();
 565         break;
 566       case STATE_RESOLVE_PROXY:
 567         DCHECK_EQ(OK, rv);
 568         rv = DoResolveProxy();
 569         break;
 570       case STATE_RESOLVE_PROXY_COMPLETE:
 571         rv = DoResolveProxyComplete(rv);
 572         break;
 573       case STATE_WAIT_FOR_JOB:
 574         DCHECK_EQ(OK, rv);
 575         rv = DoWaitForJob();
 576         break;
 577       case STATE_WAIT_FOR_JOB_COMPLETE:
 578         rv = DoWaitForJobComplete(rv);
 579         break;
 580       case STATE_INIT_CONNECTION:
 581         DCHECK_EQ(OK, rv);
 582         rv = DoInitConnection();
 583         break;
 584       case STATE_INIT_CONNECTION_COMPLETE:
 585         rv = DoInitConnectionComplete(rv);
 586         break;
 587       case STATE_WAITING_USER_ACTION:
 588         rv = DoWaitingUserAction(rv);
 589         break;
 590       case STATE_RESTART_TUNNEL_AUTH:
 591         DCHECK_EQ(OK, rv);
 592         rv = DoRestartTunnelAuth();
 593         break;
 594       case STATE_RESTART_TUNNEL_AUTH_COMPLETE:
 595         rv = DoRestartTunnelAuthComplete(rv);
 596         break;
 597       case STATE_CREATE_STREAM:
 598         DCHECK_EQ(OK, rv);
 599         rv = DoCreateStream();
 600         break;
 601       case STATE_CREATE_STREAM_COMPLETE:
 602         rv = DoCreateStreamComplete(rv);
 603         break;
 604       default:
 605         NOTREACHED() << "bad state";
 606         rv = ERR_FAILED;
 607         break;
 608     }
 609   } while (rv != ERR_IO_PENDING && next_state_ != STATE_NONE);
 610   return rv;
 611 }
 612
 613 int HttpStreamFactoryImpl::Job::StartInternal() {
 614   CHECK_EQ(STATE_NONE, next_state_);
 615   next_state_ = STATE_START;
 616   int rv = RunLoop(OK);
 617   DCHECK_EQ(ERR_IO_PENDING, rv);
 618   return rv;
 619 }
 620
 621 int HttpStreamFactoryImpl::Job::DoStart() {
 622   if (IsAlternate()) {
 623     server_ = alternative_service_.host_port_pair();
 624   } else {
 625     server_ = HostPortPair::FromURL(request_info_.url);
 626   }
 627   origin_url_ =
 628       stream_factory_->ApplyHostMappingRules(request_info_.url, &server_);
 629
 630   net_log_.BeginEvent(
 631       NetLog::TYPE_HTTP_STREAM_JOB,
 632       base::Bind(&NetLogHttpStreamJobCallback, &request_info_.url, &origin_url_,
 633                  &alternative_service_, priority_));
 634
 635   // Don't connect to restricted ports.
 636   bool is_port_allowed = IsPortAllowedByDefault(server_.port());
 637   if (request_info_.url.SchemeIs("ftp")) {
 638     // Never share connection with other jobs for FTP requests.
 639     DCHECK(!waiting_job_);
 640
 641     is_port_allowed = IsPortAllowedByFtp(server_.port());
 642   }
 643   if (!is_port_allowed && !IsPortAllowedByOverride(server_.port())) {
 644     if (waiting_job_) {
 645       waiting_job_->Resume(this);
 646       waiting_job_ = NULL;
 647     }
 648     return ERR_UNSAFE_PORT;
 649   }
 650
 651   next_state_ = STATE_RESOLVE_PROXY;
 652   return OK;
 653 }
 654
 655 int HttpStreamFactoryImpl::Job::DoResolveProxy() {
 656   DCHECK(!pac_request_);
 657   DCHECK(session_);
 658
 659   next_state_ = STATE_RESOLVE_PROXY_COMPLETE;
 660
 661   if (request_info_.load_flags & LOAD_BYPASS_PROXY) {
 662     proxy_info_.UseDirect();
 663     return OK;
 664   }
 665
 666   // TODO(rch): remove this code since Alt-Svc seems to prohibit it.
 667   GURL url_for_proxy = origin_url_;
 668   // For SPDY via Alt-Svc, set |alternative_service_url_| to
 669   // https://<alternative host>:<alternative port>/...
 670   // so the proxy resolution works with the actual destination, and so
 671   // that the correct socket pool is used.
 672   if (IsSpdyAlternate()) {
 673     // TODO(rch):  Figure out how to make QUIC iteract with PAC
 674     // scripts.  By not re-writing the URL, we will query the PAC script
 675     // for the proxy to use to reach the original URL via TCP.  But
 676     // the alternate request will be going via UDP to a different port.
 677     GURL::Replacements replacements;
 678     // new_port needs to be in scope here because GURL::Replacements references
 679     // the memory contained by it directly.
 680     const std::string new_port = base::IntToString(alternative_service_.port);
 681     replacements.SetSchemeStr("https");
 682     replacements.SetPortStr(new_port);
 683     url_for_proxy = url_for_proxy.ReplaceComponents(replacements);
 684   }
 685
 686   return session_->proxy_service()->ResolveProxy(
 687       url_for_proxy, request_info_.load_flags, &proxy_info_, io_callback_,
 688       &pac_request_, session_->network_delegate(), net_log_);
 689 }
 690
 691 int HttpStreamFactoryImpl::Job::DoResolveProxyComplete(int result) {
 692   pac_request_ = NULL;
 693
 694   if (result == OK) {
 695     // Remove unsupported proxies from the list.
 696     int supported_proxies =
 697         ProxyServer::SCHEME_DIRECT | ProxyServer::SCHEME_HTTP |
 698         ProxyServer::SCHEME_HTTPS | ProxyServer::SCHEME_SOCKS4 |
 699         ProxyServer::SCHEME_SOCKS5;
 700
 701     if (session_->params().enable_quic_for_proxies)
 702       supported_proxies |= ProxyServer::SCHEME_QUIC;
 703
 704     proxy_info_.RemoveProxiesWithoutScheme(supported_proxies);
 705
 706     if (proxy_info_.is_empty()) {
 707       // No proxies/direct to choose from. This happens when we don't support
 708       // any of the proxies in the returned list.
 709       result = ERR_NO_SUPPORTED_PROXIES;
 710     } else if (using_quic_ &&
 711                (!proxy_info_.is_quic() && !proxy_info_.is_direct())) {
 712       // QUIC can not be spoken to non-QUIC proxies.  This error should not be
 713       // user visible, because the non-alternate job should be resumed.
 714       result = ERR_NO_SUPPORTED_PROXIES;
 715     }
 716   }
 717
 718   if (result != OK) {
 719     if (waiting_job_) {
 720       waiting_job_->Resume(this);
 721       waiting_job_ = NULL;
 722     }
 723     return result;
 724   }
 725
 726   if (blocking_job_)
 727     next_state_ = STATE_WAIT_FOR_JOB;
 728   else
 729     next_state_ = STATE_INIT_CONNECTION;
 730   return OK;
 731 }
 732
 733 bool HttpStreamFactoryImpl::Job::ShouldForceQuic() const {
 734   return session_->params().enable_quic &&
 735          session_->params().origin_to_force_quic_on.Equals(server_) &&
 736          proxy_info_.is_direct();
 737 }
 738
 739 int HttpStreamFactoryImpl::Job::DoWaitForJob() {
 740   DCHECK(blocking_job_);
 741   next_state_ = STATE_WAIT_FOR_JOB_COMPLETE;
 742   return ERR_IO_PENDING;
 743 }
 744
 745 int HttpStreamFactoryImpl::Job::DoWaitForJobComplete(int result) {
 746   DCHECK(!blocking_job_);
 747   DCHECK_EQ(OK, result);
 748   next_state_ = STATE_INIT_CONNECTION;
 749   return OK;
 750 }
 751
 752 int HttpStreamFactoryImpl::Job::DoInitConnection() {
 753   // TODO(pkasting): Remove ScopedTracker below once crbug.com/462812 is fixed.
 754   tracked_objects::ScopedTracker tracking_profile(
 755       FROM_HERE_WITH_EXPLICIT_FUNCTION(
 756           "462812 HttpStreamFactoryImpl::Job::DoInitConnection"));
 757   DCHECK(!blocking_job_);
 758   DCHECK(!connection_->is_initialized());
 759   DCHECK(proxy_info_.proxy_server().is_valid());
 760   next_state_ = STATE_INIT_CONNECTION_COMPLETE;
 761
 762   using_ssl_ = origin_url_.SchemeIs("https") || origin_url_.SchemeIs("wss") ||
 763                IsSpdyAlternate();
 764   using_spdy_ = false;
 765
 766   if (ShouldForceQuic())
 767     using_quic_ = true;
 768
 769   DCHECK(!using_quic_ || session_->params().enable_quic);
 770
 771   if (proxy_info_.is_quic()) {
 772     using_quic_ = true;
 773     DCHECK(session_->params().enable_quic_for_proxies);
 774   }
 775
 776   if (using_quic_) {
 777     if (proxy_info_.is_quic() && !request_info_.url.SchemeIs("http")) {
 778       NOTREACHED();
 779       // TODO(rch): support QUIC proxies for HTTPS urls.
 780       return ERR_NOT_IMPLEMENTED;
 781     }
 782     HostPortPair destination = proxy_info_.is_quic()
 783                                    ? proxy_info_.proxy_server().host_port_pair()
 784                                    : server_;
 785     next_state_ = STATE_INIT_CONNECTION_COMPLETE;
 786     bool secure_quic = using_ssl_ || proxy_info_.is_quic();
 787     int rv = quic_request_.Request(
 788         destination, secure_quic, request_info_.privacy_mode,
 789         request_info_.method, net_log_, io_callback_);
 790     if (rv == OK) {
 791       using_existing_quic_session_ = true;
 792     } else {
 793       // OK, there's no available QUIC session. Let |waiting_job_| resume
 794       // if it's paused.
 795       if (waiting_job_) {
 796         waiting_job_->Resume(this);
 797         waiting_job_ = NULL;
 798       }
 799     }
 800     return rv;
 801   }
 802
 803   SpdySessionKey spdy_session_key = GetSpdySessionKey();
 804
 805   // Check first if we have a spdy session for this group.  If so, then go
 806   // straight to using that.
 807   if (CanUseExistingSpdySession()) {
 808     base::WeakPtr<SpdySession> spdy_session =
 809         session_->spdy_session_pool()->FindAvailableSession(spdy_session_key,
 810                                                             net_log_);
 811     if (spdy_session) {
 812       // If we're preconnecting, but we already have a SpdySession, we don't
 813       // actually need to preconnect any sockets, so we're done.
 814       if (IsPreconnecting())
 815         return OK;
 816       using_spdy_ = true;
 817       next_state_ = STATE_CREATE_STREAM;
 818       existing_spdy_session_ = spdy_session;
 819       return OK;
 820     }
 821   }
 822   if (request_ && !request_->HasSpdySessionKey() && using_ssl_) {
 823     // Update the spdy session key for the request that launched this job.
 824     request_->SetSpdySessionKey(spdy_session_key);
 825   }
 826
 827   // OK, there's no available SPDY session. Let |waiting_job_| resume if it's
 828   // paused.
 829   if (waiting_job_) {
 830     waiting_job_->Resume(this);
 831     waiting_job_ = NULL;
 832   }
 833
 834   if (proxy_info_.is_http() || proxy_info_.is_https())
 835     establishing_tunnel_ = using_ssl_;
 836
 837   // TODO(bnc): s/want_spdy_over_npn/expect_spdy_over_npn/
 838   bool want_spdy_over_npn = IsAlternate();
 839
 840   if (proxy_info_.is_https()) {
 841     InitSSLConfig(proxy_info_.proxy_server().host_port_pair(),
 842                   &proxy_ssl_config_,
 843                   true /* is a proxy server */);
 844     // Disable revocation checking for HTTPS proxies since the revocation
 845     // requests are probably going to need to go through the proxy too.
 846     proxy_ssl_config_.rev_checking_enabled = false;
 847   }
 848   if (using_ssl_) {
 849     InitSSLConfig(server_, &server_ssl_config_, false /* not a proxy server */);
 850   }
 851
 852   base::WeakPtr<HttpServerProperties> http_server_properties =
 853       session_->http_server_properties();
 854   if (http_server_properties) {
 855     http_server_properties->MaybeForceHTTP11(server_, &server_ssl_config_);
 856     if (proxy_info_.is_http() || proxy_info_.is_https()) {
 857       http_server_properties->MaybeForceHTTP11(
 858           proxy_info_.proxy_server().host_port_pair(), &proxy_ssl_config_);
 859     }
 860   }
 861
 862   if (IsPreconnecting()) {
 863     DCHECK(!stream_factory_->for_websockets_);
 864     return PreconnectSocketsForHttpRequest(
 865         GetSocketGroup(), server_, request_info_.extra_headers,
 866         request_info_.load_flags, priority_, session_, proxy_info_,
 867         want_spdy_over_npn, server_ssl_config_, proxy_ssl_config_,
 868         request_info_.privacy_mode, net_log_, num_streams_);
 869   }
 870
 871   // If we can't use a SPDY session, don't bother checking for one after
 872   // the hostname is resolved.
 873   OnHostResolutionCallback resolution_callback =
 874       CanUseExistingSpdySession()
 875           ? base::Bind(&Job::OnHostResolution, session_->spdy_session_pool(),
 876                        spdy_session_key)
 877           : OnHostResolutionCallback();
 878   if (stream_factory_->for_websockets_) {
 879     // TODO(ricea): Re-enable NPN when WebSockets over SPDY is supported.
 880     SSLConfig websocket_server_ssl_config = server_ssl_config_;
 881     websocket_server_ssl_config.next_protos.clear();
 882     return InitSocketHandleForWebSocketRequest(
 883         GetSocketGroup(), server_, request_info_.extra_headers,
 884         request_info_.load_flags, priority_, session_, proxy_info_,
 885         want_spdy_over_npn, websocket_server_ssl_config, proxy_ssl_config_,
 886         request_info_.privacy_mode, net_log_, connection_.get(),
 887         resolution_callback, io_callback_);
 888   }
 889
 890   return InitSocketHandleForHttpRequest(
 891       GetSocketGroup(), server_, request_info_.extra_headers,
 892       request_info_.load_flags, priority_, session_, proxy_info_,
 893       want_spdy_over_npn, server_ssl_config_, proxy_ssl_config_,
 894       request_info_.privacy_mode, net_log_, connection_.get(),
 895       resolution_callback, io_callback_);
 896 }
 897
 898 int HttpStreamFactoryImpl::Job::DoInitConnectionComplete(int result) {
 899   if (IsPreconnecting()) {
 900     if (using_quic_)
 901       return result;
 902     DCHECK_EQ(OK, result);
 903     return OK;
 904   }
 905
 906   if (result == ERR_SPDY_SESSION_ALREADY_EXISTS) {
 907     // We found a SPDY connection after resolving the host.  This is
 908     // probably an IP pooled connection.
 909     SpdySessionKey spdy_session_key = GetSpdySessionKey();
 910     existing_spdy_session_ =
 911         session_->spdy_session_pool()->FindAvailableSession(
 912             spdy_session_key, net_log_);
 913     if (existing_spdy_session_) {
 914       using_spdy_ = true;
 915       next_state_ = STATE_CREATE_STREAM;
 916     } else {
 917       // It is possible that the spdy session no longer exists.
 918       ReturnToStateInitConnection(true /* close connection */);
 919     }
 920     return OK;
 921   }
 922
 923   if (proxy_info_.is_quic() && using_quic_ &&
 924       (result == ERR_QUIC_PROTOCOL_ERROR ||
 925        result == ERR_QUIC_HANDSHAKE_FAILED)) {
 926     using_quic_ = false;
 927     return ReconsiderProxyAfterError(result);
 928   }
 929
 930   // TODO(willchan): Make this a bit more exact. Maybe there are recoverable
 931   // errors, such as ignoring certificate errors for Alternate-Protocol.
 932   if (result < 0 && waiting_job_) {
 933     waiting_job_->Resume(this);
 934     waiting_job_ = NULL;
 935   }
 936
 937   // |result| may be the result of any of the stacked pools. The following
 938   // logic is used when determining how to interpret an error.
 939   // If |result| < 0:
 940   //   and connection_->socket() != NULL, then the SSL handshake ran and it
 941   //     is a potentially recoverable error.
 942   //   and connection_->socket == NULL and connection_->is_ssl_error() is true,
 943   //     then the SSL handshake ran with an unrecoverable error.
 944   //   otherwise, the error came from one of the other pools.
 945   bool ssl_started = using_ssl_ && (result == OK || connection_->socket() ||
 946                                     connection_->is_ssl_error());
 947
 948   if (ssl_started && (result == OK || IsCertificateError(result))) {
 949     if (using_quic_ && result == OK) {
 950       was_npn_negotiated_ = true;
 951       NextProto protocol_negotiated =
 952           SSLClientSocket::NextProtoFromString("quic/1+spdy/3");
 953       protocol_negotiated_ = protocol_negotiated;
 954     } else {
 955       SSLClientSocket* ssl_socket =
 956           static_cast<SSLClientSocket*>(connection_->socket());
 957       if (ssl_socket->WasNpnNegotiated()) {
 958         was_npn_negotiated_ = true;
 959         std::string proto;
 960         SSLClientSocket::NextProtoStatus status =
 961             ssl_socket->GetNextProto(&proto);
 962         NextProto protocol_negotiated =
 963             SSLClientSocket::NextProtoFromString(proto);
 964         protocol_negotiated_ = protocol_negotiated;
 965         net_log_.AddEvent(
 966             NetLog::TYPE_HTTP_STREAM_REQUEST_PROTO,
 967             base::Bind(&NetLogHttpStreamProtoCallback,
 968                        status, &proto));
 969         if (ssl_socket->was_spdy_negotiated())
 970           SwitchToSpdyMode();
 971       }
 972     }
 973   } else if (proxy_info_.is_https() && connection_->socket() &&
 974         result == OK) {
 975     ProxyClientSocket* proxy_socket =
 976       static_cast<ProxyClientSocket*>(connection_->socket());
 977     if (proxy_socket->IsUsingSpdy()) {
 978       was_npn_negotiated_ = true;
 979       protocol_negotiated_ = proxy_socket->GetProtocolNegotiated();
 980       SwitchToSpdyMode();
 981     }
 982   }
 983
 984   if (result == ERR_PROXY_AUTH_REQUESTED ||
 985       result == ERR_HTTPS_PROXY_TUNNEL_RESPONSE) {
 986     DCHECK(!ssl_started);
 987     // Other state (i.e. |using_ssl_|) suggests that |connection_| will have an
 988     // SSL socket, but there was an error before that could happen.  This
 989     // puts the in progress HttpProxy socket into |connection_| in order to
 990     // complete the auth (or read the response body).  The tunnel restart code
 991     // is careful to remove it before returning control to the rest of this
 992     // class.
 993     connection_.reset(connection_->release_pending_http_proxy_connection());
 994     return result;
 995   }
 996
 997   if (!ssl_started && result < 0 && IsAlternate()) {
 998     job_status_ = STATUS_BROKEN;
 999     MaybeMarkAlternativeServiceBroken();
1000     return result;
1001   }
1002
1003   if (using_quic_) {
1004     if (result < 0) {
1005       job_status_ = STATUS_BROKEN;
1006       MaybeMarkAlternativeServiceBroken();
1007       return result;
1008     }
1009     stream_ = quic_request_.ReleaseStream();
1010     next_state_ = STATE_NONE;
1011     return OK;
1012   }
1013
1014   if (result < 0 && !ssl_started)
1015     return ReconsiderProxyAfterError(result);
1016   establishing_tunnel_ = false;
1017
1018   if (connection_->socket()) {
1019     // We officially have a new connection.  Record the type.
1020     if (!connection_->is_reused()) {
1021       ConnectionType type = using_spdy_ ? CONNECTION_SPDY : CONNECTION_HTTP;
1022       UpdateConnectionTypeHistograms(type);
1023     }
1024   }
1025
1026   // Handle SSL errors below.
1027   if (using_ssl_) {
1028     DCHECK(ssl_started);
1029     if (IsCertificateError(result)) {
1030       if (using_spdy_ && IsAlternate() && origin_url_.SchemeIs("http")) {
1031         // We ignore certificate errors for http over spdy.
1032         spdy_certificate_error_ = result;
1033         result = OK;
1034       } else {
1035         result = HandleCertificateError(result);
1036         if (result == OK && !connection_->socket()->IsConnectedAndIdle()) {
1037           ReturnToStateInitConnection(true /* close connection */);
1038           return result;
1039         }
1040       }
1041     }
1042     if (result < 0)
1043       return result;
1044   }
1045
1046   next_state_ = STATE_CREATE_STREAM;
1047   return OK;
1048 }
1049
1050 int HttpStreamFactoryImpl::Job::DoWaitingUserAction(int result) {
1051   // This state indicates that the stream request is in a partially
1052   // completed state, and we've called back to the delegate for more
1053   // information.
1054
1055   // We're always waiting here for the delegate to call us back.
1056   return ERR_IO_PENDING;
1057 }
1058
1059 int HttpStreamFactoryImpl::Job::SetSpdyHttpStream(
1060     base::WeakPtr<SpdySession> session, bool direct) {
1061   // TODO(ricea): Restore the code for WebSockets over SPDY once it's
1062   // implemented.
1063   if (stream_factory_->for_websockets_)
1064     return ERR_NOT_IMPLEMENTED;
1065
1066   // TODO(willchan): Delete this code, because eventually, the
1067   // HttpStreamFactoryImpl will be creating all the SpdyHttpStreams, since it
1068   // will know when SpdySessions become available.
1069
1070   bool use_relative_url = direct || request_info_.url.SchemeIs("https");
1071   stream_.reset(new SpdyHttpStream(session, use_relative_url));
1072   return OK;
1073 }
1074
1075 int HttpStreamFactoryImpl::Job::DoCreateStream() {
1076   // TODO(pkasting): Remove ScopedTracker below once crbug.com/462811 is fixed.
1077   tracked_objects::ScopedTracker tracking_profile(
1078       FROM_HERE_WITH_EXPLICIT_FUNCTION(
1079           "462811 HttpStreamFactoryImpl::Job::DoCreateStream"));
1080   DCHECK(connection_->socket() || existing_spdy_session_.get() || using_quic_);
1081
1082   next_state_ = STATE_CREATE_STREAM_COMPLETE;
1083
1084   // We only set the socket motivation if we're the first to use
1085   // this socket.  Is there a race for two SPDY requests?  We really
1086   // need to plumb this through to the connect level.
1087   if (connection_->socket() && !connection_->is_reused())
1088     SetSocketMotivation();
1089
1090   if (!using_spdy_) {
1091     // We may get ftp scheme when fetching ftp resources through proxy.
1092     bool using_proxy = (proxy_info_.is_http() || proxy_info_.is_https()) &&
1093                        (request_info_.url.SchemeIs("http") ||
1094                         request_info_.url.SchemeIs("ftp"));
1095     if (stream_factory_->for_websockets_) {
1096       DCHECK(request_);
1097       DCHECK(request_->websocket_handshake_stream_create_helper());
1098       websocket_stream_.reset(
1099           request_->websocket_handshake_stream_create_helper()
1100               ->CreateBasicStream(connection_.Pass(), using_proxy));
1101     } else {
1102       stream_.reset(new HttpBasicStream(connection_.release(), using_proxy));
1103     }
1104     return OK;
1105   }
1106
1107   CHECK(!stream_.get());
1108
1109   bool direct = !IsHttpsProxyAndHttpUrl();
1110   if (existing_spdy_session_.get()) {
1111     // We picked up an existing session, so we don't need our socket.
1112     if (connection_->socket())
1113       connection_->socket()->Disconnect();
1114     connection_->Reset();
1115
1116     int set_result = SetSpdyHttpStream(existing_spdy_session_, direct);
1117     existing_spdy_session_.reset();
1118     return set_result;
1119   }
1120
1121   SpdySessionPool* spdy_pool = session_->spdy_session_pool();
1122   SpdySessionKey spdy_session_key = GetSpdySessionKey();
1123   base::WeakPtr<SpdySession> spdy_session =
1124       spdy_pool->FindAvailableSession(spdy_session_key, net_log_);
1125
1126   if (spdy_session) {
1127     return SetSpdyHttpStream(spdy_session, direct);
1128   }
1129
1130   spdy_session =
1131       spdy_pool->CreateAvailableSessionFromSocket(spdy_session_key,
1132                                                   connection_.Pass(),
1133                                                   net_log_,
1134                                                   spdy_certificate_error_,
1135                                                   using_ssl_);
1136   if (!spdy_session->HasAcceptableTransportSecurity()) {
1137     spdy_session->CloseSessionOnError(
1138         ERR_SPDY_INADEQUATE_TRANSPORT_SECURITY, "");
1139     return ERR_SPDY_INADEQUATE_TRANSPORT_SECURITY;
1140   }
1141
1142   new_spdy_session_ = spdy_session;
1143   spdy_session_direct_ = direct;
1144   const HostPortPair& host_port_pair = spdy_session_key.host_port_pair();
1145   base::WeakPtr<HttpServerProperties> http_server_properties =
1146       session_->http_server_properties();
1147   if (http_server_properties)
1148     http_server_properties->SetSupportsSpdy(host_port_pair, true);
1149
1150   // Create a SpdyHttpStream attached to the session;
1151   // OnNewSpdySessionReadyCallback is not called until an event loop
1152   // iteration later, so if the SpdySession is closed between then, allow
1153   // reuse state from the underlying socket, sampled by SpdyHttpStream,
1154   // bubble up to the request.
1155   return SetSpdyHttpStream(new_spdy_session_, spdy_session_direct_);
1156 }
1157
1158 int HttpStreamFactoryImpl::Job::DoCreateStreamComplete(int result) {
1159   if (result < 0)
1160     return result;
1161
1162   session_->proxy_service()->ReportSuccess(proxy_info_,
1163                                            session_->network_delegate());
1164   next_state_ = STATE_NONE;
1165   return OK;
1166 }
1167
1168 int HttpStreamFactoryImpl::Job::DoRestartTunnelAuth() {
1169   next_state_ = STATE_RESTART_TUNNEL_AUTH_COMPLETE;
1170   ProxyClientSocket* proxy_socket =
1171       static_cast<ProxyClientSocket*>(connection_->socket());
1172   return proxy_socket->RestartWithAuth(io_callback_);
1173 }
1174
1175 int HttpStreamFactoryImpl::Job::DoRestartTunnelAuthComplete(int result) {
1176   if (result == ERR_PROXY_AUTH_REQUESTED)
1177     return result;
1178
1179   if (result == OK) {
1180     // Now that we've got the HttpProxyClientSocket connected.  We have
1181     // to release it as an idle socket into the pool and start the connection
1182     // process from the beginning.  Trying to pass it in with the
1183     // SSLSocketParams might cause a deadlock since params are dispatched
1184     // interchangeably.  This request won't necessarily get this http proxy
1185     // socket, but there will be forward progress.
1186     establishing_tunnel_ = false;
1187     ReturnToStateInitConnection(false /* do not close connection */);
1188     return OK;
1189   }
1190
1191   return ReconsiderProxyAfterError(result);
1192 }
1193
1194 void HttpStreamFactoryImpl::Job::ReturnToStateInitConnection(
1195     bool close_connection) {
1196   if (close_connection && connection_->socket())
1197     connection_->socket()->Disconnect();
1198   connection_->Reset();
1199
1200   if (request_)
1201     request_->RemoveRequestFromSpdySessionRequestMap();
1202
1203   next_state_ = STATE_INIT_CONNECTION;
1204 }
1205
1206 void HttpStreamFactoryImpl::Job::SetSocketMotivation() {
1207   if (request_info_.motivation == HttpRequestInfo::PRECONNECT_MOTIVATED)
1208     connection_->socket()->SetSubresourceSpeculation();
1209   else if (request_info_.motivation == HttpRequestInfo::OMNIBOX_MOTIVATED)
1210     connection_->socket()->SetOmniboxSpeculation();
1211   // TODO(mbelshe): Add other motivations (like EARLY_LOAD_MOTIVATED).
1212 }
1213
1214 bool HttpStreamFactoryImpl::Job::IsHttpsProxyAndHttpUrl() const {
1215   if (!proxy_info_.is_https())
1216     return false;
1217   if (IsAlternate()) {
1218     // We currently only support Alternate-Protocol where the original scheme
1219     // is http.
1220     DCHECK(origin_url_.SchemeIs("http"));
1221     return origin_url_.SchemeIs("http");
1222   }
1223   return request_info_.url.SchemeIs("http");
1224 }
1225
1226 bool HttpStreamFactoryImpl::Job::IsAlternate() const {
1227   return alternative_service_.protocol != UNINITIALIZED_ALTERNATE_PROTOCOL;
1228 }
1229
1230 bool HttpStreamFactoryImpl::Job::IsSpdyAlternate() const {
1231   return alternative_service_.protocol >= NPN_SPDY_MINIMUM_VERSION &&
1232          alternative_service_.protocol <= NPN_SPDY_MAXIMUM_VERSION;
1233 }
1234
1235 void HttpStreamFactoryImpl::Job::InitSSLConfig(const HostPortPair& server,
1236                                                SSLConfig* ssl_config,
1237                                                bool is_proxy) const {
1238   if (proxy_info_.is_https() && ssl_config->send_client_cert) {
1239     // When connecting through an HTTPS proxy, disable TLS False Start so
1240     // that client authentication errors can be distinguished between those
1241     // originating from the proxy server (ERR_PROXY_CONNECTION_FAILED) and
1242     // those originating from the endpoint (ERR_SSL_PROTOCOL_ERROR /
1243     // ERR_BAD_SSL_CLIENT_AUTH_CERT).
1244     // TODO(rch): This assumes that the HTTPS proxy will only request a
1245     // client certificate during the initial handshake.
1246     // http://crbug.com/59292
1247     ssl_config->false_start_enabled = false;
1248   }
1249
1250   enum {
1251     FALLBACK_NONE = 0,    // SSL version fallback did not occur.
1252     FALLBACK_SSL3 = 1,    // Fell back to SSL 3.0.
1253     FALLBACK_TLS1 = 2,    // Fell back to TLS 1.0.
1254     FALLBACK_TLS1_1 = 3,  // Fell back to TLS 1.1.
1255     FALLBACK_MAX
1256   };
1257
1258   int fallback = FALLBACK_NONE;
1259   if (ssl_config->version_fallback) {
1260     switch (ssl_config->version_max) {
1261       case SSL_PROTOCOL_VERSION_SSL3:
1262         fallback = FALLBACK_SSL3;
1263         break;
1264       case SSL_PROTOCOL_VERSION_TLS1:
1265         fallback = FALLBACK_TLS1;
1266         break;
1267       case SSL_PROTOCOL_VERSION_TLS1_1:
1268         fallback = FALLBACK_TLS1_1;
1269         break;
1270     }
1271   }
1272   UMA_HISTOGRAM_ENUMERATION("Net.ConnectionUsedSSLVersionFallback",
1273                             fallback, FALLBACK_MAX);
1274
1275   UMA_HISTOGRAM_BOOLEAN("Net.ConnectionUsedSSLDeprecatedCipherFallback",
1276                         ssl_config->enable_deprecated_cipher_suites);
1277
1278   // We also wish to measure the amount of fallback connections for a host that
1279   // we know implements TLS up to 1.2. Ideally there would be no fallback here
1280   // but high numbers of SSLv3 would suggest that SSLv3 fallback is being
1281   // caused by network middleware rather than buggy HTTPS servers.
1282   const std::string& host = server.host();
1283   if (!is_proxy &&
1284       host.size() >= 10 &&
1285       host.compare(host.size() - 10, 10, "google.com") == 0 &&
1286       (host.size() == 10 || host[host.size()-11] == '.')) {
1287     UMA_HISTOGRAM_ENUMERATION("Net.GoogleConnectionUsedSSLVersionFallback",
1288                               fallback, FALLBACK_MAX);
1289   }
1290
1291   if (request_info_.load_flags & LOAD_VERIFY_EV_CERT)
1292     ssl_config->verify_ev_cert = true;
1293
1294   // Disable Channel ID if privacy mode is enabled.
1295   if (request_info_.privacy_mode == PRIVACY_MODE_ENABLED)
1296     ssl_config->channel_id_enabled = false;
1297 }
1298
1299
1300 int HttpStreamFactoryImpl::Job::ReconsiderProxyAfterError(int error) {
1301   DCHECK(!pac_request_);
1302   DCHECK(session_);
1303
1304   // A failure to resolve the hostname or any error related to establishing a
1305   // TCP connection could be grounds for trying a new proxy configuration.
1306   //
1307   // Why do this when a hostname cannot be resolved?  Some URLs only make sense
1308   // to proxy servers.  The hostname in those URLs might fail to resolve if we
1309   // are still using a non-proxy config.  We need to check if a proxy config
1310   // now exists that corresponds to a proxy server that could load the URL.
1311   //
1312   switch (error) {
1313     case ERR_PROXY_CONNECTION_FAILED:
1314     case ERR_NAME_NOT_RESOLVED:
1315     case ERR_INTERNET_DISCONNECTED:
1316     case ERR_ADDRESS_UNREACHABLE:
1317     case ERR_CONNECTION_CLOSED:
1318     case ERR_CONNECTION_TIMED_OUT:
1319     case ERR_CONNECTION_RESET:
1320     case ERR_CONNECTION_REFUSED:
1321     case ERR_CONNECTION_ABORTED:
1322     case ERR_TIMED_OUT:
1323     case ERR_TUNNEL_CONNECTION_FAILED:
1324     case ERR_SOCKS_CONNECTION_FAILED:
1325     // This can happen in the case of trying to talk to a proxy using SSL, and
1326     // ending up talking to a captive portal that supports SSL instead.
1327     case ERR_PROXY_CERTIFICATE_INVALID:
1328     // This can happen when trying to talk SSL to a non-SSL server (Like a
1329     // captive portal).
1330     case ERR_QUIC_PROTOCOL_ERROR:
1331     case ERR_QUIC_HANDSHAKE_FAILED:
1332     case ERR_SSL_PROTOCOL_ERROR:
1333       break;
1334     case ERR_SOCKS_CONNECTION_HOST_UNREACHABLE:
1335       // Remap the SOCKS-specific "host unreachable" error to a more
1336       // generic error code (this way consumers like the link doctor
1337       // know to substitute their error page).
1338       //
1339       // Note that if the host resolving was done by the SOCKS5 proxy, we can't
1340       // differentiate between a proxy-side "host not found" versus a proxy-side
1341       // "address unreachable" error, and will report both of these failures as
1342       // ERR_ADDRESS_UNREACHABLE.
1343       return ERR_ADDRESS_UNREACHABLE;
1344     default:
1345       return error;
1346   }
1347
1348   if (request_info_.load_flags & LOAD_BYPASS_PROXY) {
1349     return error;
1350   }
1351
1352   if (proxy_info_.is_https() && proxy_ssl_config_.send_client_cert) {
1353     session_->ssl_client_auth_cache()->Remove(
1354         proxy_info_.proxy_server().host_port_pair());
1355   }
1356
1357   int rv = session_->proxy_service()->ReconsiderProxyAfterError(
1358       request_info_.url, request_info_.load_flags, error, &proxy_info_,
1359       io_callback_, &pac_request_, session_->network_delegate(), net_log_);
1360   if (rv == OK || rv == ERR_IO_PENDING) {
1361     // If the error was during connection setup, there is no socket to
1362     // disconnect.
1363     if (connection_->socket())
1364       connection_->socket()->Disconnect();
1365     connection_->Reset();
1366     if (request_)
1367       request_->RemoveRequestFromSpdySessionRequestMap();
1368     next_state_ = STATE_RESOLVE_PROXY_COMPLETE;
1369   } else {
1370     // If ReconsiderProxyAfterError() failed synchronously, it means
1371     // there was nothing left to fall-back to, so fail the transaction
1372     // with the last connection error we got.
1373     // TODO(eroman): This is a confusing contract, make it more obvious.
1374     rv = error;
1375   }
1376
1377   return rv;
1378 }
1379
1380 int HttpStreamFactoryImpl::Job::HandleCertificateError(int error) {
1381   DCHECK(using_ssl_);
1382   DCHECK(IsCertificateError(error));
1383
1384   SSLClientSocket* ssl_socket =
1385       static_cast<SSLClientSocket*>(connection_->socket());
1386   ssl_socket->GetSSLInfo(&ssl_info_);
1387
1388   // Add the bad certificate to the set of allowed certificates in the
1389   // SSL config object. This data structure will be consulted after calling
1390   // RestartIgnoringLastError(). And the user will be asked interactively
1391   // before RestartIgnoringLastError() is ever called.
1392   SSLConfig::CertAndStatus bad_cert;
1393
1394   // |ssl_info_.cert| may be NULL if we failed to create
1395   // X509Certificate for whatever reason, but normally it shouldn't
1396   // happen, unless this code is used inside sandbox.
1397   if (ssl_info_.cert.get() == NULL ||
1398       !X509Certificate::GetDEREncoded(ssl_info_.cert->os_cert_handle(),
1399                                       &bad_cert.der_cert)) {
1400     return error;
1401   }
1402   bad_cert.cert_status = ssl_info_.cert_status;
1403   server_ssl_config_.allowed_bad_certs.push_back(bad_cert);
1404
1405   int load_flags = request_info_.load_flags;
1406   if (session_->params().ignore_certificate_errors)
1407     load_flags |= LOAD_IGNORE_ALL_CERT_ERRORS;
1408   if (ssl_socket->IgnoreCertError(error, load_flags))
1409     return OK;
1410   return error;
1411 }
1412
1413 void HttpStreamFactoryImpl::Job::SwitchToSpdyMode() {
1414   if (HttpStreamFactory::spdy_enabled())
1415     using_spdy_ = true;
1416 }
1417
1418 bool HttpStreamFactoryImpl::Job::IsPreconnecting() const {
1419   DCHECK_GE(num_streams_, 0);
1420   return num_streams_ > 0;
1421 }
1422
1423 bool HttpStreamFactoryImpl::Job::IsOrphaned() const {
1424   return !IsPreconnecting() && !request_;
1425 }
1426
1427 void HttpStreamFactoryImpl::Job::ReportJobSucceededForRequest() {
1428   if (using_existing_quic_session_) {
1429     // If an existing session was used, then no TCP connection was
1430     // started.
1431     HistogramAlternateProtocolUsage(ALTERNATE_PROTOCOL_USAGE_NO_RACE);
1432   } else if (IsAlternate()) {
1433     // This job was the alternate protocol job, and hence won the race.
1434     HistogramAlternateProtocolUsage(ALTERNATE_PROTOCOL_USAGE_WON_RACE);
1435   } else {
1436     // This job was the normal job, and hence the alternate protocol job lost
1437     // the race.
1438     HistogramAlternateProtocolUsage(ALTERNATE_PROTOCOL_USAGE_LOST_RACE);
1439   }
1440 }
1441
1442 void HttpStreamFactoryImpl::Job::MarkOtherJobComplete(const Job& job) {
1443   DCHECK_EQ(STATUS_RUNNING, other_job_status_);
1444   other_job_status_ = job.job_status_;
1445   other_job_alternative_service_ = job.alternative_service_;
1446   MaybeMarkAlternativeServiceBroken();
1447 }
1448
1449 void HttpStreamFactoryImpl::Job::MaybeMarkAlternativeServiceBroken() {
1450   if (job_status_ == STATUS_RUNNING || other_job_status_ == STATUS_RUNNING)
1451     return;
1452
1453   if (IsAlternate()) {
1454     if (job_status_ == STATUS_BROKEN && other_job_status_ == STATUS_SUCCEEDED) {
1455       HistogramBrokenAlternateProtocolLocation(
1456           BROKEN_ALTERNATE_PROTOCOL_LOCATION_HTTP_STREAM_FACTORY_IMPL_JOB_ALT);
1457       session_->http_server_properties()->MarkAlternativeServiceBroken(
1458           alternative_service_);
1459     }
1460     return;
1461   }
1462
1463   if (job_status_ == STATUS_SUCCEEDED && other_job_status_ == STATUS_BROKEN) {
1464     HistogramBrokenAlternateProtocolLocation(
1465         BROKEN_ALTERNATE_PROTOCOL_LOCATION_HTTP_STREAM_FACTORY_IMPL_JOB_MAIN);
1466     session_->http_server_properties()->MarkAlternativeServiceBroken(
1467         other_job_alternative_service_);
1468   }
1469 }
1470
1471 ClientSocketPoolManager::SocketGroupType
1472 HttpStreamFactoryImpl::Job::GetSocketGroup() const {
1473   std::string scheme = origin_url_.scheme();
1474   if (scheme == "https" || scheme == "wss" || IsSpdyAlternate())
1475     return ClientSocketPoolManager::SSL_GROUP;
1476
1477   if (scheme == "ftp")
1478     return ClientSocketPoolManager::FTP_GROUP;
1479
1480   return ClientSocketPoolManager::NORMAL_GROUP;
1481 }
1482
1483 }  // namespace net