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     AlternateProtocolInfo alternate) {
 171   DCHECK(!original_url_.get());
 172   original_url_.reset(new GURL(original_url));
 173   alternate_protocol_ = alternate;
 174   if (alternate.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   // TODO(pkasting): Remove ScopedTracker below once crbug.com/455884 is fixed.
 441   tracked_objects::ScopedTracker tracking_profile(
 442       FROM_HERE_WITH_EXPLICIT_FUNCTION(
 443           "455884 HttpStreamFactoryImpl::Job::OnIOComplete"));
 444   RunLoop(result);
 445 }
 446
 447 int HttpStreamFactoryImpl::Job::RunLoop(int result) {
 448   result = DoLoop(result);
 449
 450   if (result == ERR_IO_PENDING)
 451     return result;
 452
 453   // If there was an error, we should have already resumed the |waiting_job_|,
 454   // if there was one.
 455   DCHECK(result == OK || waiting_job_ == NULL);
 456
 457   if (IsPreconnecting()) {
 458     base::MessageLoop::current()->PostTask(
 459         FROM_HERE,
 460         base::Bind(&HttpStreamFactoryImpl::Job::OnPreconnectsComplete,
 461                    ptr_factory_.GetWeakPtr()));
 462     return ERR_IO_PENDING;
 463   }
 464
 465   if (IsCertificateError(result)) {
 466     // Retrieve SSL information from the socket.
 467     GetSSLInfo();
 468
 469     next_state_ = STATE_WAITING_USER_ACTION;
 470     base::MessageLoop::current()->PostTask(
 471         FROM_HERE,
 472         base::Bind(&HttpStreamFactoryImpl::Job::OnCertificateErrorCallback,
 473                    ptr_factory_.GetWeakPtr(), result, ssl_info_));
 474     return ERR_IO_PENDING;
 475   }
 476
 477   switch (result) {
 478     case ERR_PROXY_AUTH_REQUESTED: {
 479       UMA_HISTOGRAM_BOOLEAN("Net.ProxyAuthRequested.HasConnection",
 480                             connection_.get() != NULL);
 481       if (!connection_.get())
 482         return ERR_PROXY_AUTH_REQUESTED_WITH_NO_CONNECTION;
 483       CHECK(connection_->socket());
 484       CHECK(establishing_tunnel_);
 485
 486       next_state_ = STATE_WAITING_USER_ACTION;
 487       ProxyClientSocket* proxy_socket =
 488           static_cast<ProxyClientSocket*>(connection_->socket());
 489       base::MessageLoop::current()->PostTask(
 490           FROM_HERE,
 491           base::Bind(&Job::OnNeedsProxyAuthCallback, ptr_factory_.GetWeakPtr(),
 492                      *proxy_socket->GetConnectResponseInfo(),
 493                      proxy_socket->GetAuthController()));
 494       return ERR_IO_PENDING;
 495     }
 496
 497     case ERR_SSL_CLIENT_AUTH_CERT_NEEDED:
 498       base::MessageLoop::current()->PostTask(
 499           FROM_HERE,
 500           base::Bind(&Job::OnNeedsClientAuthCallback, ptr_factory_.GetWeakPtr(),
 501                      connection_->ssl_error_response_info().cert_request_info));
 502       return ERR_IO_PENDING;
 503
 504     case ERR_HTTPS_PROXY_TUNNEL_RESPONSE: {
 505       DCHECK(connection_.get());
 506       DCHECK(connection_->socket());
 507       DCHECK(establishing_tunnel_);
 508
 509       ProxyClientSocket* proxy_socket =
 510           static_cast<ProxyClientSocket*>(connection_->socket());
 511       base::MessageLoop::current()->PostTask(
 512           FROM_HERE,
 513           base::Bind(&Job::OnHttpsProxyTunnelResponseCallback,
 514                      ptr_factory_.GetWeakPtr(),
 515                      *proxy_socket->GetConnectResponseInfo(),
 516                      proxy_socket->CreateConnectResponseStream()));
 517       return ERR_IO_PENDING;
 518     }
 519
 520     case OK:
 521       job_status_ = STATUS_SUCCEEDED;
 522       MaybeMarkAlternateProtocolBroken();
 523       next_state_ = STATE_DONE;
 524       if (new_spdy_session_.get()) {
 525         base::MessageLoop::current()->PostTask(
 526             FROM_HERE,
 527             base::Bind(&Job::OnNewSpdySessionReadyCallback,
 528                        ptr_factory_.GetWeakPtr()));
 529       } else if (stream_factory_->for_websockets_) {
 530         DCHECK(websocket_stream_);
 531         base::MessageLoop::current()->PostTask(
 532             FROM_HERE,
 533             base::Bind(&Job::OnWebSocketHandshakeStreamReadyCallback,
 534                        ptr_factory_.GetWeakPtr()));
 535       } else {
 536         DCHECK(stream_.get());
 537         base::MessageLoop::current()->PostTask(
 538             FROM_HERE,
 539             base::Bind(&Job::OnStreamReadyCallback, ptr_factory_.GetWeakPtr()));
 540       }
 541       return ERR_IO_PENDING;
 542
 543     default:
 544       if (job_status_ != STATUS_BROKEN) {
 545         DCHECK_EQ(STATUS_RUNNING, job_status_);
 546         job_status_ = STATUS_FAILED;
 547         MaybeMarkAlternateProtocolBroken();
 548       }
 549       base::MessageLoop::current()->PostTask(
 550           FROM_HERE,
 551           base::Bind(&Job::OnStreamFailedCallback, ptr_factory_.GetWeakPtr(),
 552                      result));
 553       return ERR_IO_PENDING;
 554   }
 555 }
 556
 557 int HttpStreamFactoryImpl::Job::DoLoop(int result) {
 558   DCHECK_NE(next_state_, STATE_NONE);
 559   int rv = result;
 560   do {
 561     State state = next_state_;
 562     next_state_ = STATE_NONE;
 563     switch (state) {
 564       case STATE_START:
 565         DCHECK_EQ(OK, rv);
 566         rv = DoStart();
 567         break;
 568       case STATE_RESOLVE_PROXY:
 569         DCHECK_EQ(OK, rv);
 570         rv = DoResolveProxy();
 571         break;
 572       case STATE_RESOLVE_PROXY_COMPLETE:
 573         rv = DoResolveProxyComplete(rv);
 574         break;
 575       case STATE_WAIT_FOR_JOB:
 576         DCHECK_EQ(OK, rv);
 577         rv = DoWaitForJob();
 578         break;
 579       case STATE_WAIT_FOR_JOB_COMPLETE:
 580         rv = DoWaitForJobComplete(rv);
 581         break;
 582       case STATE_INIT_CONNECTION:
 583         DCHECK_EQ(OK, rv);
 584         rv = DoInitConnection();
 585         break;
 586       case STATE_INIT_CONNECTION_COMPLETE:
 587         rv = DoInitConnectionComplete(rv);
 588         break;
 589       case STATE_WAITING_USER_ACTION:
 590         rv = DoWaitingUserAction(rv);
 591         break;
 592       case STATE_RESTART_TUNNEL_AUTH:
 593         DCHECK_EQ(OK, rv);
 594         rv = DoRestartTunnelAuth();
 595         break;
 596       case STATE_RESTART_TUNNEL_AUTH_COMPLETE:
 597         rv = DoRestartTunnelAuthComplete(rv);
 598         break;
 599       case STATE_CREATE_STREAM:
 600         DCHECK_EQ(OK, rv);
 601         rv = DoCreateStream();
 602         break;
 603       case STATE_CREATE_STREAM_COMPLETE:
 604         rv = DoCreateStreamComplete(rv);
 605         break;
 606       default:
 607         NOTREACHED() << "bad state";
 608         rv = ERR_FAILED;
 609         break;
 610     }
 611   } while (rv != ERR_IO_PENDING && next_state_ != STATE_NONE);
 612   return rv;
 613 }
 614
 615 int HttpStreamFactoryImpl::Job::StartInternal() {
 616   CHECK_EQ(STATE_NONE, next_state_);
 617   next_state_ = STATE_START;
 618   int rv = RunLoop(OK);
 619   DCHECK_EQ(ERR_IO_PENDING, rv);
 620   return rv;
 621 }
 622
 623 int HttpStreamFactoryImpl::Job::DoStart() {
 624   origin_ = HostPortPair::FromURL(request_info_.url);
 625   origin_url_ = stream_factory_->ApplyHostMappingRules(
 626       request_info_.url, &origin_);
 627
 628   net_log_.BeginEvent(NetLog::TYPE_HTTP_STREAM_JOB,
 629                       base::Bind(&NetLogHttpStreamJobCallback,
 630                                  &request_info_.url, &origin_url_,
 631                                  priority_));
 632
 633   // Don't connect to restricted ports.
 634   bool is_port_allowed = IsPortAllowedByDefault(origin_.port());
 635   if (request_info_.url.SchemeIs("ftp")) {
 636     // Never share connection with other jobs for FTP requests.
 637     DCHECK(!waiting_job_);
 638
 639     is_port_allowed = IsPortAllowedByFtp(origin_.port());
 640   }
 641   if (!is_port_allowed && !IsPortAllowedByOverride(origin_.port())) {
 642     if (waiting_job_) {
 643       waiting_job_->Resume(this);
 644       waiting_job_ = NULL;
 645     }
 646     return ERR_UNSAFE_PORT;
 647   }
 648
 649   next_state_ = STATE_RESOLVE_PROXY;
 650   return OK;
 651 }
 652
 653 int HttpStreamFactoryImpl::Job::DoResolveProxy() {
 654   DCHECK(!pac_request_);
 655   DCHECK(session_);
 656
 657   next_state_ = STATE_RESOLVE_PROXY_COMPLETE;
 658
 659   if (request_info_.load_flags & LOAD_BYPASS_PROXY) {
 660     proxy_info_.UseDirect();
 661     return OK;
 662   }
 663
 664   return session_->proxy_service()->ResolveProxy(
 665       request_info_.url, request_info_.load_flags, &proxy_info_, io_callback_,
 666       &pac_request_, session_->network_delegate(), net_log_);
 667 }
 668
 669 int HttpStreamFactoryImpl::Job::DoResolveProxyComplete(int result) {
 670   pac_request_ = NULL;
 671
 672   if (result == OK) {
 673     // Remove unsupported proxies from the list.
 674     proxy_info_.RemoveProxiesWithoutScheme(
 675         ProxyServer::SCHEME_DIRECT | ProxyServer::SCHEME_QUIC |
 676         ProxyServer::SCHEME_HTTP | ProxyServer::SCHEME_HTTPS |
 677         ProxyServer::SCHEME_SOCKS4 | ProxyServer::SCHEME_SOCKS5);
 678
 679     if (proxy_info_.is_empty()) {
 680       // No proxies/direct to choose from. This happens when we don't support
 681       // any of the proxies in the returned list.
 682       result = ERR_NO_SUPPORTED_PROXIES;
 683     } else if (using_quic_ &&
 684                (!proxy_info_.is_quic() && !proxy_info_.is_direct())) {
 685       // QUIC can not be spoken to non-QUIC proxies.  This error should not be
 686       // user visible, because the non-alternate job should be resumed.
 687       result = ERR_NO_SUPPORTED_PROXIES;
 688     }
 689   }
 690
 691   if (result != OK) {
 692     if (waiting_job_) {
 693       waiting_job_->Resume(this);
 694       waiting_job_ = NULL;
 695     }
 696     return result;
 697   }
 698
 699   if (blocking_job_)
 700     next_state_ = STATE_WAIT_FOR_JOB;
 701   else
 702     next_state_ = STATE_INIT_CONNECTION;
 703   return OK;
 704 }
 705
 706 bool HttpStreamFactoryImpl::Job::ShouldForceSpdySSL() const {
 707   bool rv = session_->params().force_spdy_always &&
 708       session_->params().force_spdy_over_ssl;
 709   return rv && !session_->HasSpdyExclusion(origin_);
 710 }
 711
 712 bool HttpStreamFactoryImpl::Job::ShouldForceSpdyWithoutSSL() const {
 713   bool rv = session_->params().force_spdy_always &&
 714       !session_->params().force_spdy_over_ssl;
 715   return rv && !session_->HasSpdyExclusion(origin_);
 716 }
 717
 718 bool HttpStreamFactoryImpl::Job::ShouldForceQuic() const {
 719   return session_->params().enable_quic &&
 720     session_->params().origin_to_force_quic_on.Equals(origin_) &&
 721     proxy_info_.is_direct();
 722 }
 723
 724 int HttpStreamFactoryImpl::Job::DoWaitForJob() {
 725   DCHECK(blocking_job_);
 726   next_state_ = STATE_WAIT_FOR_JOB_COMPLETE;
 727   return ERR_IO_PENDING;
 728 }
 729
 730 int HttpStreamFactoryImpl::Job::DoWaitForJobComplete(int result) {
 731   DCHECK(!blocking_job_);
 732   DCHECK_EQ(OK, result);
 733   next_state_ = STATE_INIT_CONNECTION;
 734   return OK;
 735 }
 736
 737 int HttpStreamFactoryImpl::Job::DoInitConnection() {
 738   DCHECK(!blocking_job_);
 739   DCHECK(!connection_->is_initialized());
 740   DCHECK(proxy_info_.proxy_server().is_valid());
 741   next_state_ = STATE_INIT_CONNECTION_COMPLETE;
 742
 743   using_ssl_ = request_info_.url.SchemeIs("https") ||
 744       request_info_.url.SchemeIs("wss") || ShouldForceSpdySSL();
 745   using_spdy_ = false;
 746
 747   if (ShouldForceQuic())
 748     using_quic_ = true;
 749
 750   if (proxy_info_.is_quic())
 751     using_quic_ = true;
 752
 753   if (using_quic_) {
 754     DCHECK(session_->params().enable_quic);
 755     if (proxy_info_.is_quic() && !request_info_.url.SchemeIs("http")) {
 756       NOTREACHED();
 757       // TODO(rch): support QUIC proxies for HTTPS urls.
 758       return ERR_NOT_IMPLEMENTED;
 759     }
 760     HostPortPair destination = proxy_info_.is_quic() ?
 761         proxy_info_.proxy_server().host_port_pair() : origin_;
 762     next_state_ = STATE_INIT_CONNECTION_COMPLETE;
 763     bool secure_quic = using_ssl_ || proxy_info_.is_quic();
 764     int rv = quic_request_.Request(
 765         destination, secure_quic, request_info_.privacy_mode,
 766         request_info_.method, net_log_, io_callback_);
 767     if (rv == OK) {
 768       using_existing_quic_session_ = true;
 769     } else {
 770       // OK, there's no available QUIC session. Let |waiting_job_| resume
 771       // if it's paused.
 772       if (waiting_job_) {
 773         waiting_job_->Resume(this);
 774         waiting_job_ = NULL;
 775       }
 776     }
 777     return rv;
 778   }
 779
 780   // Check first if we have a spdy session for this group.  If so, then go
 781   // straight to using that.
 782   SpdySessionKey spdy_session_key = GetSpdySessionKey();
 783   base::WeakPtr<SpdySession> spdy_session =
 784       session_->spdy_session_pool()->FindAvailableSession(
 785           spdy_session_key, net_log_);
 786   if (spdy_session && CanUseExistingSpdySession()) {
 787     // If we're preconnecting, but we already have a SpdySession, we don't
 788     // actually need to preconnect any sockets, so we're done.
 789     if (IsPreconnecting())
 790       return OK;
 791     using_spdy_ = true;
 792     next_state_ = STATE_CREATE_STREAM;
 793     existing_spdy_session_ = spdy_session;
 794     return OK;
 795   } else if (request_ && !request_->HasSpdySessionKey() &&
 796              (using_ssl_ || ShouldForceSpdyWithoutSSL())) {
 797     // Update the spdy session key for the request that launched this job.
 798     request_->SetSpdySessionKey(spdy_session_key);
 799   }
 800
 801   // OK, there's no available SPDY session. Let |waiting_job_| resume if it's
 802   // paused.
 803
 804   if (waiting_job_) {
 805     waiting_job_->Resume(this);
 806     waiting_job_ = NULL;
 807   }
 808
 809   if (proxy_info_.is_http() || proxy_info_.is_https())
 810     establishing_tunnel_ = using_ssl_;
 811
 812   bool want_spdy_over_npn = original_url_ != NULL;
 813
 814   if (proxy_info_.is_https()) {
 815     InitSSLConfig(proxy_info_.proxy_server().host_port_pair(),
 816                   &proxy_ssl_config_,
 817                   true /* is a proxy server */);
 818     // Disable revocation checking for HTTPS proxies since the revocation
 819     // requests are probably going to need to go through the proxy too.
 820     proxy_ssl_config_.rev_checking_enabled = false;
 821   }
 822   if (using_ssl_) {
 823     InitSSLConfig(origin_, &server_ssl_config_,
 824                   false /* not a proxy server */);
 825   }
 826
 827   base::WeakPtr<HttpServerProperties> http_server_properties =
 828       session_->http_server_properties();
 829   if (http_server_properties) {
 830     http_server_properties->MaybeForceHTTP11(origin_, &server_ssl_config_);
 831     if (proxy_info_.is_http() || proxy_info_.is_https()) {
 832       http_server_properties->MaybeForceHTTP11(
 833           proxy_info_.proxy_server().host_port_pair(), &proxy_ssl_config_);
 834     }
 835   }
 836
 837   if (IsPreconnecting()) {
 838     DCHECK(!stream_factory_->for_websockets_);
 839     return PreconnectSocketsForHttpRequest(
 840         origin_url_,
 841         request_info_.extra_headers,
 842         request_info_.load_flags,
 843         priority_,
 844         session_,
 845         proxy_info_,
 846         ShouldForceSpdySSL(),
 847         want_spdy_over_npn,
 848         server_ssl_config_,
 849         proxy_ssl_config_,
 850         request_info_.privacy_mode,
 851         net_log_,
 852         num_streams_);
 853   }
 854
 855   // If we can't use a SPDY session, don't both checking for one after
 856   // the hostname is resolved.
 857   OnHostResolutionCallback resolution_callback = CanUseExistingSpdySession() ?
 858       base::Bind(&Job::OnHostResolution, session_->spdy_session_pool(),
 859                  GetSpdySessionKey()) :
 860       OnHostResolutionCallback();
 861   if (stream_factory_->for_websockets_) {
 862     // TODO(ricea): Re-enable NPN when WebSockets over SPDY is supported.
 863     SSLConfig websocket_server_ssl_config = server_ssl_config_;
 864     websocket_server_ssl_config.next_protos.clear();
 865     return InitSocketHandleForWebSocketRequest(
 866         origin_url_, request_info_.extra_headers, request_info_.load_flags,
 867         priority_, session_, proxy_info_, ShouldForceSpdySSL(),
 868         want_spdy_over_npn, websocket_server_ssl_config, proxy_ssl_config_,
 869         request_info_.privacy_mode, net_log_,
 870         connection_.get(), resolution_callback, io_callback_);
 871   }
 872
 873   return InitSocketHandleForHttpRequest(
 874       origin_url_, request_info_.extra_headers, request_info_.load_flags,
 875       priority_, session_, proxy_info_, ShouldForceSpdySSL(),
 876       want_spdy_over_npn, server_ssl_config_, proxy_ssl_config_,
 877       request_info_.privacy_mode, net_log_,
 878       connection_.get(), resolution_callback, io_callback_);
 879 }
 880
 881 int HttpStreamFactoryImpl::Job::DoInitConnectionComplete(int result) {
 882   if (IsPreconnecting()) {
 883     if (using_quic_)
 884       return result;
 885     DCHECK_EQ(OK, result);
 886     return OK;
 887   }
 888
 889   if (result == ERR_SPDY_SESSION_ALREADY_EXISTS) {
 890     // We found a SPDY connection after resolving the host.  This is
 891     // probably an IP pooled connection.
 892     SpdySessionKey spdy_session_key = GetSpdySessionKey();
 893     existing_spdy_session_ =
 894         session_->spdy_session_pool()->FindAvailableSession(
 895             spdy_session_key, net_log_);
 896     if (existing_spdy_session_) {
 897       using_spdy_ = true;
 898       next_state_ = STATE_CREATE_STREAM;
 899     } else {
 900       // It is possible that the spdy session no longer exists.
 901       ReturnToStateInitConnection(true /* close connection */);
 902     }
 903     return OK;
 904   }
 905
 906   if (proxy_info_.is_quic() && using_quic_ &&
 907       (result == ERR_QUIC_PROTOCOL_ERROR ||
 908        result == ERR_QUIC_HANDSHAKE_FAILED)) {
 909     using_quic_ = false;
 910     return ReconsiderProxyAfterError(result);
 911   }
 912
 913   // TODO(willchan): Make this a bit more exact. Maybe there are recoverable
 914   // errors, such as ignoring certificate errors for Alternate-Protocol.
 915   if (result < 0 && waiting_job_) {
 916     waiting_job_->Resume(this);
 917     waiting_job_ = NULL;
 918   }
 919
 920   // |result| may be the result of any of the stacked pools. The following
 921   // logic is used when determining how to interpret an error.
 922   // If |result| < 0:
 923   //   and connection_->socket() != NULL, then the SSL handshake ran and it
 924   //     is a potentially recoverable error.
 925   //   and connection_->socket == NULL and connection_->is_ssl_error() is true,
 926   //     then the SSL handshake ran with an unrecoverable error.
 927   //   otherwise, the error came from one of the other pools.
 928   bool ssl_started = using_ssl_ && (result == OK || connection_->socket() ||
 929                                     connection_->is_ssl_error());
 930
 931   if (ssl_started && (result == OK || IsCertificateError(result))) {
 932     if (using_quic_ && result == OK) {
 933       was_npn_negotiated_ = true;
 934       NextProto protocol_negotiated =
 935           SSLClientSocket::NextProtoFromString("quic/1+spdy/3");
 936       protocol_negotiated_ = protocol_negotiated;
 937     } else {
 938       SSLClientSocket* ssl_socket =
 939           static_cast<SSLClientSocket*>(connection_->socket());
 940       if (ssl_socket->WasNpnNegotiated()) {
 941         was_npn_negotiated_ = true;
 942         std::string proto;
 943         SSLClientSocket::NextProtoStatus status =
 944             ssl_socket->GetNextProto(&proto);
 945         NextProto protocol_negotiated =
 946             SSLClientSocket::NextProtoFromString(proto);
 947         protocol_negotiated_ = protocol_negotiated;
 948         net_log_.AddEvent(
 949             NetLog::TYPE_HTTP_STREAM_REQUEST_PROTO,
 950             base::Bind(&NetLogHttpStreamProtoCallback,
 951                        status, &proto));
 952         if (ssl_socket->was_spdy_negotiated())
 953           SwitchToSpdyMode();
 954       }
 955       if (ShouldForceSpdySSL())
 956         SwitchToSpdyMode();
 957     }
 958   } else if (proxy_info_.is_https() && connection_->socket() &&
 959         result == OK) {
 960     ProxyClientSocket* proxy_socket =
 961       static_cast<ProxyClientSocket*>(connection_->socket());
 962     if (proxy_socket->IsUsingSpdy()) {
 963       was_npn_negotiated_ = true;
 964       protocol_negotiated_ = proxy_socket->GetProtocolNegotiated();
 965       SwitchToSpdyMode();
 966     }
 967   }
 968
 969   // We may be using spdy without SSL
 970   if (ShouldForceSpdyWithoutSSL())
 971     SwitchToSpdyMode();
 972
 973   if (result == ERR_PROXY_AUTH_REQUESTED ||
 974       result == ERR_HTTPS_PROXY_TUNNEL_RESPONSE) {
 975     DCHECK(!ssl_started);
 976     // Other state (i.e. |using_ssl_|) suggests that |connection_| will have an
 977     // SSL socket, but there was an error before that could happen.  This
 978     // puts the in progress HttpProxy socket into |connection_| in order to
 979     // complete the auth (or read the response body).  The tunnel restart code
 980     // is careful to remove it before returning control to the rest of this
 981     // class.
 982     connection_.reset(connection_->release_pending_http_proxy_connection());
 983     return result;
 984   }
 985
 986   if (!ssl_started && result < 0 && original_url_.get()) {
 987     job_status_ = STATUS_BROKEN;
 988     MaybeMarkAlternateProtocolBroken();
 989     return result;
 990   }
 991
 992   if (using_quic_) {
 993     if (result < 0) {
 994       job_status_ = STATUS_BROKEN;
 995       MaybeMarkAlternateProtocolBroken();
 996       return result;
 997     }
 998     stream_ = quic_request_.ReleaseStream();
 999     next_state_ = STATE_NONE;
1000     return OK;
1001   }
1002
1003   if (result < 0 && !ssl_started)
1004     return ReconsiderProxyAfterError(result);
1005   establishing_tunnel_ = false;
1006
1007   if (connection_->socket()) {
1008     LogHttpConnectedMetrics(*connection_);
1009
1010     // We officially have a new connection.  Record the type.
1011     if (!connection_->is_reused()) {
1012       ConnectionType type = using_spdy_ ? CONNECTION_SPDY : CONNECTION_HTTP;
1013       UpdateConnectionTypeHistograms(type);
1014     }
1015   }
1016
1017   // Handle SSL errors below.
1018   if (using_ssl_) {
1019     DCHECK(ssl_started);
1020     if (IsCertificateError(result)) {
1021       if (using_spdy_ && original_url_.get() &&
1022           original_url_->SchemeIs("http")) {
1023         // We ignore certificate errors for http over spdy.
1024         spdy_certificate_error_ = result;
1025         result = OK;
1026       } else {
1027         result = HandleCertificateError(result);
1028         if (result == OK && !connection_->socket()->IsConnectedAndIdle()) {
1029           ReturnToStateInitConnection(true /* close connection */);
1030           return result;
1031         }
1032       }
1033     }
1034     if (result < 0)
1035       return result;
1036   }
1037
1038   next_state_ = STATE_CREATE_STREAM;
1039   return OK;
1040 }
1041
1042 int HttpStreamFactoryImpl::Job::DoWaitingUserAction(int result) {
1043   // This state indicates that the stream request is in a partially
1044   // completed state, and we've called back to the delegate for more
1045   // information.
1046
1047   // We're always waiting here for the delegate to call us back.
1048   return ERR_IO_PENDING;
1049 }
1050
1051 int HttpStreamFactoryImpl::Job::SetSpdyHttpStream(
1052     base::WeakPtr<SpdySession> session, bool direct) {
1053   // TODO(ricea): Restore the code for WebSockets over SPDY once it's
1054   // implemented.
1055   if (stream_factory_->for_websockets_)
1056     return ERR_NOT_IMPLEMENTED;
1057
1058   // TODO(willchan): Delete this code, because eventually, the
1059   // HttpStreamFactoryImpl will be creating all the SpdyHttpStreams, since it
1060   // will know when SpdySessions become available.
1061
1062   bool use_relative_url = direct || request_info_.url.SchemeIs("https");
1063   stream_.reset(new SpdyHttpStream(session, use_relative_url));
1064   return OK;
1065 }
1066
1067 int HttpStreamFactoryImpl::Job::DoCreateStream() {
1068   DCHECK(connection_->socket() || existing_spdy_session_.get() || using_quic_);
1069
1070   next_state_ = STATE_CREATE_STREAM_COMPLETE;
1071
1072   // We only set the socket motivation if we're the first to use
1073   // this socket.  Is there a race for two SPDY requests?  We really
1074   // need to plumb this through to the connect level.
1075   if (connection_->socket() && !connection_->is_reused())
1076     SetSocketMotivation();
1077
1078   if (!using_spdy_) {
1079     // We may get ftp scheme when fetching ftp resources through proxy.
1080     bool using_proxy = (proxy_info_.is_http() || proxy_info_.is_https()) &&
1081                        (request_info_.url.SchemeIs("http") ||
1082                         request_info_.url.SchemeIs("ftp"));
1083     if (stream_factory_->for_websockets_) {
1084       DCHECK(request_);
1085       DCHECK(request_->websocket_handshake_stream_create_helper());
1086       websocket_stream_.reset(
1087           request_->websocket_handshake_stream_create_helper()
1088               ->CreateBasicStream(connection_.Pass(), using_proxy));
1089     } else {
1090       stream_.reset(new HttpBasicStream(connection_.release(), using_proxy));
1091     }
1092     return OK;
1093   }
1094
1095   CHECK(!stream_.get());
1096
1097   bool direct = true;
1098   const ProxyServer& proxy_server = proxy_info_.proxy_server();
1099   PrivacyMode privacy_mode = request_info_.privacy_mode;
1100   if (IsHttpsProxyAndHttpUrl())
1101     direct = false;
1102
1103   if (existing_spdy_session_.get()) {
1104     // We picked up an existing session, so we don't need our socket.
1105     if (connection_->socket())
1106       connection_->socket()->Disconnect();
1107     connection_->Reset();
1108
1109     int set_result = SetSpdyHttpStream(existing_spdy_session_, direct);
1110     existing_spdy_session_.reset();
1111     return set_result;
1112   }
1113
1114   SpdySessionKey spdy_session_key(origin_, proxy_server, privacy_mode);
1115   if (IsHttpsProxyAndHttpUrl()) {
1116     // If we don't have a direct SPDY session, and we're using an HTTPS
1117     // proxy, then we might have a SPDY session to the proxy.
1118     // We never use privacy mode for connection to proxy server.
1119     spdy_session_key = SpdySessionKey(proxy_server.host_port_pair(),
1120                                       ProxyServer::Direct(),
1121                                       PRIVACY_MODE_DISABLED);
1122   }
1123
1124   SpdySessionPool* spdy_pool = session_->spdy_session_pool();
1125   base::WeakPtr<SpdySession> spdy_session =
1126       spdy_pool->FindAvailableSession(spdy_session_key, net_log_);
1127
1128   if (spdy_session) {
1129     return SetSpdyHttpStream(spdy_session, direct);
1130   }
1131
1132   spdy_session =
1133       spdy_pool->CreateAvailableSessionFromSocket(spdy_session_key,
1134                                                   connection_.Pass(),
1135                                                   net_log_,
1136                                                   spdy_certificate_error_,
1137                                                   using_ssl_);
1138   if (!spdy_session->HasAcceptableTransportSecurity()) {
1139     spdy_session->CloseSessionOnError(
1140         ERR_SPDY_INADEQUATE_TRANSPORT_SECURITY, "");
1141     return ERR_SPDY_INADEQUATE_TRANSPORT_SECURITY;
1142   }
1143
1144   new_spdy_session_ = spdy_session;
1145   spdy_session_direct_ = direct;
1146   const HostPortPair& host_port_pair = spdy_session_key.host_port_pair();
1147   base::WeakPtr<HttpServerProperties> http_server_properties =
1148       session_->http_server_properties();
1149   if (http_server_properties)
1150     http_server_properties->SetSupportsSpdy(host_port_pair, true);
1151
1152   // Create a SpdyHttpStream attached to the session;
1153   // OnNewSpdySessionReadyCallback is not called until an event loop
1154   // iteration later, so if the SpdySession is closed between then, allow
1155   // reuse state from the underlying socket, sampled by SpdyHttpStream,
1156   // bubble up to the request.
1157   return SetSpdyHttpStream(new_spdy_session_, spdy_session_direct_);
1158 }
1159
1160 int HttpStreamFactoryImpl::Job::DoCreateStreamComplete(int result) {
1161   if (result < 0)
1162     return result;
1163
1164   session_->proxy_service()->ReportSuccess(proxy_info_,
1165                                            session_->network_delegate());
1166   next_state_ = STATE_NONE;
1167   return OK;
1168 }
1169
1170 int HttpStreamFactoryImpl::Job::DoRestartTunnelAuth() {
1171   next_state_ = STATE_RESTART_TUNNEL_AUTH_COMPLETE;
1172   ProxyClientSocket* proxy_socket =
1173       static_cast<ProxyClientSocket*>(connection_->socket());
1174   return proxy_socket->RestartWithAuth(io_callback_);
1175 }
1176
1177 int HttpStreamFactoryImpl::Job::DoRestartTunnelAuthComplete(int result) {
1178   if (result == ERR_PROXY_AUTH_REQUESTED)
1179     return result;
1180
1181   if (result == OK) {
1182     // Now that we've got the HttpProxyClientSocket connected.  We have
1183     // to release it as an idle socket into the pool and start the connection
1184     // process from the beginning.  Trying to pass it in with the
1185     // SSLSocketParams might cause a deadlock since params are dispatched
1186     // interchangeably.  This request won't necessarily get this http proxy
1187     // socket, but there will be forward progress.
1188     establishing_tunnel_ = false;
1189     ReturnToStateInitConnection(false /* do not close connection */);
1190     return OK;
1191   }
1192
1193   return ReconsiderProxyAfterError(result);
1194 }
1195
1196 void HttpStreamFactoryImpl::Job::ReturnToStateInitConnection(
1197     bool close_connection) {
1198   if (close_connection && connection_->socket())
1199     connection_->socket()->Disconnect();
1200   connection_->Reset();
1201
1202   if (request_)
1203     request_->RemoveRequestFromSpdySessionRequestMap();
1204
1205   next_state_ = STATE_INIT_CONNECTION;
1206 }
1207
1208 void HttpStreamFactoryImpl::Job::SetSocketMotivation() {
1209   if (request_info_.motivation == HttpRequestInfo::PRECONNECT_MOTIVATED)
1210     connection_->socket()->SetSubresourceSpeculation();
1211   else if (request_info_.motivation == HttpRequestInfo::OMNIBOX_MOTIVATED)
1212     connection_->socket()->SetOmniboxSpeculation();
1213   // TODO(mbelshe): Add other motivations (like EARLY_LOAD_MOTIVATED).
1214 }
1215
1216 bool HttpStreamFactoryImpl::Job::IsHttpsProxyAndHttpUrl() const {
1217   if (!proxy_info_.is_https())
1218     return false;
1219   if (original_url_.get()) {
1220     // We currently only support Alternate-Protocol where the original scheme
1221     // is http.
1222     DCHECK(original_url_->SchemeIs("http"));
1223     return original_url_->SchemeIs("http");
1224   }
1225   return request_info_.url.SchemeIs("http");
1226 }
1227
1228 // Sets several fields of ssl_config for the given origin_server based on the
1229 // proxy info and other factors.
1230 void HttpStreamFactoryImpl::Job::InitSSLConfig(
1231     const HostPortPair& origin_server,
1232     SSLConfig* ssl_config,
1233     bool is_proxy) const {
1234   if (proxy_info_.is_https() && ssl_config->send_client_cert) {
1235     // When connecting through an HTTPS proxy, disable TLS False Start so
1236     // that client authentication errors can be distinguished between those
1237     // originating from the proxy server (ERR_PROXY_CONNECTION_FAILED) and
1238     // those originating from the endpoint (ERR_SSL_PROTOCOL_ERROR /
1239     // ERR_BAD_SSL_CLIENT_AUTH_CERT).
1240     // TODO(rch): This assumes that the HTTPS proxy will only request a
1241     // client certificate during the initial handshake.
1242     // http://crbug.com/59292
1243     ssl_config->false_start_enabled = false;
1244   }
1245
1246   enum {
1247     FALLBACK_NONE = 0,    // SSL version fallback did not occur.
1248     FALLBACK_SSL3 = 1,    // Fell back to SSL 3.0.
1249     FALLBACK_TLS1 = 2,    // Fell back to TLS 1.0.
1250     FALLBACK_TLS1_1 = 3,  // Fell back to TLS 1.1.
1251     FALLBACK_MAX
1252   };
1253
1254   int fallback = FALLBACK_NONE;
1255   if (ssl_config->version_fallback) {
1256     switch (ssl_config->version_max) {
1257       case SSL_PROTOCOL_VERSION_SSL3:
1258         fallback = FALLBACK_SSL3;
1259         break;
1260       case SSL_PROTOCOL_VERSION_TLS1:
1261         fallback = FALLBACK_TLS1;
1262         break;
1263       case SSL_PROTOCOL_VERSION_TLS1_1:
1264         fallback = FALLBACK_TLS1_1;
1265         break;
1266     }
1267   }
1268   UMA_HISTOGRAM_ENUMERATION("Net.ConnectionUsedSSLVersionFallback",
1269                             fallback, FALLBACK_MAX);
1270
1271   // We also wish to measure the amount of fallback connections for a host that
1272   // we know implements TLS up to 1.2. Ideally there would be no fallback here
1273   // but high numbers of SSLv3 would suggest that SSLv3 fallback is being
1274   // caused by network middleware rather than buggy HTTPS servers.
1275   const std::string& host = origin_server.host();
1276   if (!is_proxy &&
1277       host.size() >= 10 &&
1278       host.compare(host.size() - 10, 10, "google.com") == 0 &&
1279       (host.size() == 10 || host[host.size()-11] == '.')) {
1280     UMA_HISTOGRAM_ENUMERATION("Net.GoogleConnectionUsedSSLVersionFallback",
1281                               fallback, FALLBACK_MAX);
1282   }
1283
1284   if (request_info_.load_flags & LOAD_VERIFY_EV_CERT)
1285     ssl_config->verify_ev_cert = true;
1286
1287   // Disable Channel ID if privacy mode is enabled.
1288   if (request_info_.privacy_mode == PRIVACY_MODE_ENABLED)
1289     ssl_config->channel_id_enabled = false;
1290 }
1291
1292
1293 int HttpStreamFactoryImpl::Job::ReconsiderProxyAfterError(int error) {
1294   DCHECK(!pac_request_);
1295   DCHECK(session_);
1296
1297   // A failure to resolve the hostname or any error related to establishing a
1298   // TCP connection could be grounds for trying a new proxy configuration.
1299   //
1300   // Why do this when a hostname cannot be resolved?  Some URLs only make sense
1301   // to proxy servers.  The hostname in those URLs might fail to resolve if we
1302   // are still using a non-proxy config.  We need to check if a proxy config
1303   // now exists that corresponds to a proxy server that could load the URL.
1304   //
1305   switch (error) {
1306     case ERR_PROXY_CONNECTION_FAILED:
1307     case ERR_NAME_NOT_RESOLVED:
1308     case ERR_INTERNET_DISCONNECTED:
1309     case ERR_ADDRESS_UNREACHABLE:
1310     case ERR_CONNECTION_CLOSED:
1311     case ERR_CONNECTION_TIMED_OUT:
1312     case ERR_CONNECTION_RESET:
1313     case ERR_CONNECTION_REFUSED:
1314     case ERR_CONNECTION_ABORTED:
1315     case ERR_TIMED_OUT:
1316     case ERR_TUNNEL_CONNECTION_FAILED:
1317     case ERR_SOCKS_CONNECTION_FAILED:
1318     // This can happen in the case of trying to talk to a proxy using SSL, and
1319     // ending up talking to a captive portal that supports SSL instead.
1320     case ERR_PROXY_CERTIFICATE_INVALID:
1321     // This can happen when trying to talk SSL to a non-SSL server (Like a
1322     // captive portal).
1323     case ERR_QUIC_PROTOCOL_ERROR:
1324     case ERR_QUIC_HANDSHAKE_FAILED:
1325     case ERR_SSL_PROTOCOL_ERROR:
1326       break;
1327     case ERR_SOCKS_CONNECTION_HOST_UNREACHABLE:
1328       // Remap the SOCKS-specific "host unreachable" error to a more
1329       // generic error code (this way consumers like the link doctor
1330       // know to substitute their error page).
1331       //
1332       // Note that if the host resolving was done by the SOCKS5 proxy, we can't
1333       // differentiate between a proxy-side "host not found" versus a proxy-side
1334       // "address unreachable" error, and will report both of these failures as
1335       // ERR_ADDRESS_UNREACHABLE.
1336       return ERR_ADDRESS_UNREACHABLE;
1337     default:
1338       return error;
1339   }
1340
1341   if (request_info_.load_flags & LOAD_BYPASS_PROXY) {
1342     return error;
1343   }
1344
1345   if (proxy_info_.is_https() && proxy_ssl_config_.send_client_cert) {
1346     session_->ssl_client_auth_cache()->Remove(
1347         proxy_info_.proxy_server().host_port_pair());
1348   }
1349
1350   int rv = session_->proxy_service()->ReconsiderProxyAfterError(
1351       request_info_.url, request_info_.load_flags, error, &proxy_info_,
1352       io_callback_, &pac_request_, session_->network_delegate(), net_log_);
1353   if (rv == OK || rv == ERR_IO_PENDING) {
1354     // If the error was during connection setup, there is no socket to
1355     // disconnect.
1356     if (connection_->socket())
1357       connection_->socket()->Disconnect();
1358     connection_->Reset();
1359     if (request_)
1360       request_->RemoveRequestFromSpdySessionRequestMap();
1361     next_state_ = STATE_RESOLVE_PROXY_COMPLETE;
1362   } else {
1363     // If ReconsiderProxyAfterError() failed synchronously, it means
1364     // there was nothing left to fall-back to, so fail the transaction
1365     // with the last connection error we got.
1366     // TODO(eroman): This is a confusing contract, make it more obvious.
1367     rv = error;
1368   }
1369
1370   return rv;
1371 }
1372
1373 int HttpStreamFactoryImpl::Job::HandleCertificateError(int error) {
1374   DCHECK(using_ssl_);
1375   DCHECK(IsCertificateError(error));
1376
1377   SSLClientSocket* ssl_socket =
1378       static_cast<SSLClientSocket*>(connection_->socket());
1379   ssl_socket->GetSSLInfo(&ssl_info_);
1380
1381   // Add the bad certificate to the set of allowed certificates in the
1382   // SSL config object. This data structure will be consulted after calling
1383   // RestartIgnoringLastError(). And the user will be asked interactively
1384   // before RestartIgnoringLastError() is ever called.
1385   SSLConfig::CertAndStatus bad_cert;
1386
1387   // |ssl_info_.cert| may be NULL if we failed to create
1388   // X509Certificate for whatever reason, but normally it shouldn't
1389   // happen, unless this code is used inside sandbox.
1390   if (ssl_info_.cert.get() == NULL ||
1391       !X509Certificate::GetDEREncoded(ssl_info_.cert->os_cert_handle(),
1392                                       &bad_cert.der_cert)) {
1393     return error;
1394   }
1395   bad_cert.cert_status = ssl_info_.cert_status;
1396   server_ssl_config_.allowed_bad_certs.push_back(bad_cert);
1397
1398   int load_flags = request_info_.load_flags;
1399   if (session_->params().ignore_certificate_errors)
1400     load_flags |= LOAD_IGNORE_ALL_CERT_ERRORS;
1401   if (ssl_socket->IgnoreCertError(error, load_flags))
1402     return OK;
1403   return error;
1404 }
1405
1406 void HttpStreamFactoryImpl::Job::SwitchToSpdyMode() {
1407   if (HttpStreamFactory::spdy_enabled())
1408     using_spdy_ = true;
1409 }
1410
1411 // static
1412 void HttpStreamFactoryImpl::Job::LogHttpConnectedMetrics(
1413     const ClientSocketHandle& handle) {
1414   UMA_HISTOGRAM_ENUMERATION("Net.HttpSocketType", handle.reuse_type(),
1415                             ClientSocketHandle::NUM_TYPES);
1416
1417   switch (handle.reuse_type()) {
1418     case ClientSocketHandle::UNUSED:
1419       UMA_HISTOGRAM_CUSTOM_TIMES("Net.HttpConnectionLatency",
1420                                  handle.setup_time(),
1421                                  base::TimeDelta::FromMilliseconds(1),
1422                                  base::TimeDelta::FromMinutes(10),
1423                                  100);
1424       break;
1425     case ClientSocketHandle::UNUSED_IDLE:
1426       UMA_HISTOGRAM_CUSTOM_TIMES("Net.SocketIdleTimeBeforeNextUse_UnusedSocket",
1427                                  handle.idle_time(),
1428                                  base::TimeDelta::FromMilliseconds(1),
1429                                  base::TimeDelta::FromMinutes(6),
1430                                  100);
1431       break;
1432     case ClientSocketHandle::REUSED_IDLE:
1433       UMA_HISTOGRAM_CUSTOM_TIMES("Net.SocketIdleTimeBeforeNextUse_ReusedSocket",
1434                                  handle.idle_time(),
1435                                  base::TimeDelta::FromMilliseconds(1),
1436                                  base::TimeDelta::FromMinutes(6),
1437                                  100);
1438       break;
1439     default:
1440       NOTREACHED();
1441       break;
1442   }
1443 }
1444
1445 bool HttpStreamFactoryImpl::Job::IsPreconnecting() const {
1446   DCHECK_GE(num_streams_, 0);
1447   return num_streams_ > 0;
1448 }
1449
1450 bool HttpStreamFactoryImpl::Job::IsOrphaned() const {
1451   return !IsPreconnecting() && !request_;
1452 }
1453
1454 void HttpStreamFactoryImpl::Job::ReportJobSuccededForRequest() {
1455   if (using_existing_quic_session_) {
1456     // If an existing session was used, then no TCP connection was
1457     // started.
1458     HistogramAlternateProtocolUsage(ALTERNATE_PROTOCOL_USAGE_NO_RACE);
1459   } else if (original_url_) {
1460     // This job was the alternate protocol job, and hence won the race.
1461     HistogramAlternateProtocolUsage(ALTERNATE_PROTOCOL_USAGE_WON_RACE);
1462   } else {
1463     // This job was the normal job, and hence the alternate protocol job lost
1464     // the race.
1465     HistogramAlternateProtocolUsage(ALTERNATE_PROTOCOL_USAGE_LOST_RACE);
1466   }
1467 }
1468
1469 void HttpStreamFactoryImpl::Job::MarkOtherJobComplete(const Job& job) {
1470   DCHECK_EQ(STATUS_RUNNING, other_job_status_);
1471   other_job_status_ = job.job_status_;
1472   other_job_alternate_protocol_ = job.alternate_protocol_;
1473   MaybeMarkAlternateProtocolBroken();
1474 }
1475
1476 void HttpStreamFactoryImpl::Job::MaybeMarkAlternateProtocolBroken() {
1477   if (job_status_ == STATUS_RUNNING || other_job_status_ == STATUS_RUNNING)
1478     return;
1479
1480   bool is_alternate_protocol_job = original_url_.get() != NULL;
1481   if (is_alternate_protocol_job) {
1482     if (job_status_ == STATUS_BROKEN && other_job_status_ == STATUS_SUCCEEDED) {
1483       HistogramBrokenAlternateProtocolLocation(
1484           BROKEN_ALTERNATE_PROTOCOL_LOCATION_HTTP_STREAM_FACTORY_IMPL_JOB_ALT);
1485       session_->http_server_properties()->SetBrokenAlternateProtocol(
1486           HostPortPair::FromURL(*original_url_));
1487     }
1488     return;
1489   }
1490
1491   if (job_status_ == STATUS_SUCCEEDED && other_job_status_ == STATUS_BROKEN) {
1492     HistogramBrokenAlternateProtocolLocation(
1493         BROKEN_ALTERNATE_PROTOCOL_LOCATION_HTTP_STREAM_FACTORY_IMPL_JOB_MAIN);
1494     session_->http_server_properties()->SetBrokenAlternateProtocol(
1495         HostPortPair::FromURL(request_info_.url));
1496   }
1497 }
1498
1499 }  // namespace net