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/stl_util.h"
  14 #include "base/strings/string_util.h"
  15 #include "base/strings/stringprintf.h"
  16 #include "base/values.h"
  17 #include "build/build_config.h"
  18 #include "net/base/connection_type_histograms.h"
  19 #include "net/base/net_log.h"
  20 #include "net/base/net_util.h"
  21 #include "net/http/http_basic_stream.h"
  22 #include "net/http/http_network_session.h"
  23 #include "net/http/http_proxy_client_socket.h"
  24 #include "net/http/http_proxy_client_socket_pool.h"
  25 #include "net/http/http_request_info.h"
  26 #include "net/http/http_server_properties.h"
  27 #include "net/http/http_stream_factory.h"
  28 #include "net/http/http_stream_factory_impl_request.h"
  29 #include "net/quic/quic_http_stream.h"
  30 #include "net/socket/client_socket_handle.h"
  31 #include "net/socket/client_socket_pool.h"
  32 #include "net/socket/client_socket_pool_manager.h"
  33 #include "net/socket/socks_client_socket_pool.h"
  34 #include "net/socket/ssl_client_socket.h"
  35 #include "net/socket/ssl_client_socket_pool.h"
  36 #include "net/spdy/spdy_http_stream.h"
  37 #include "net/spdy/spdy_session.h"
  38 #include "net/spdy/spdy_session_pool.h"
  39 #include "net/ssl/ssl_cert_request_info.h"
  40
  41 namespace net {
  42
  43 // Returns parameters associated with the start of a HTTP stream job.
  44 base::Value* NetLogHttpStreamJobCallback(const GURL* original_url,
  45                                          const GURL* url,
  46                                          RequestPriority priority,
  47                                          NetLog::LogLevel /* log_level */) {
  48   base::DictionaryValue* dict = new base::DictionaryValue();
  49   dict->SetString("original_url", original_url->GetOrigin().spec());
  50   dict->SetString("url", url->GetOrigin().spec());
  51   dict->SetString("priority", RequestPriorityToString(priority));
  52   return dict;
  53 }
  54
  55 // Returns parameters associated with the Proto (with NPN negotiation) of a HTTP
  56 // stream.
  57 base::Value* NetLogHttpStreamProtoCallback(
  58     const SSLClientSocket::NextProtoStatus status,
  59     const std::string* proto,
  60     NetLog::LogLevel /* log_level */) {
  61   base::DictionaryValue* dict = new base::DictionaryValue();
  62
  63   dict->SetString("next_proto_status",
  64                   SSLClientSocket::NextProtoStatusToString(status));
  65   dict->SetString("proto", *proto);
  66   return dict;
  67 }
  68
  69 HttpStreamFactoryImpl::Job::Job(HttpStreamFactoryImpl* stream_factory,
  70                                 HttpNetworkSession* session,
  71                                 const HttpRequestInfo& request_info,
  72                                 RequestPriority priority,
  73                                 const SSLConfig& server_ssl_config,
  74                                 const SSLConfig& proxy_ssl_config,
  75                                 NetLog* net_log)
  76     : request_(NULL),
  77       request_info_(request_info),
  78       priority_(priority),
  79       server_ssl_config_(server_ssl_config),
  80       proxy_ssl_config_(proxy_ssl_config),
  81       net_log_(BoundNetLog::Make(net_log, NetLog::SOURCE_HTTP_STREAM_JOB)),
  82       io_callback_(base::Bind(&Job::OnIOComplete, base::Unretained(this))),
  83       connection_(new ClientSocketHandle),
  84       session_(session),
  85       stream_factory_(stream_factory),
  86       next_state_(STATE_NONE),
  87       pac_request_(NULL),
  88       blocking_job_(NULL),
  89       waiting_job_(NULL),
  90       using_ssl_(false),
  91       using_spdy_(false),
  92       using_quic_(false),
  93       quic_request_(session_->quic_stream_factory()),
  94       using_existing_quic_session_(false),
  95       spdy_certificate_error_(OK),
  96       establishing_tunnel_(false),
  97       was_npn_negotiated_(false),
  98       protocol_negotiated_(kProtoUnknown),
  99       num_streams_(0),
 100       spdy_session_direct_(false),
 101       job_status_(STATUS_RUNNING),
 102       other_job_status_(STATUS_RUNNING),
 103       ptr_factory_(this) {
 104   DCHECK(stream_factory);
 105   DCHECK(session);
 106 }
 107
 108 HttpStreamFactoryImpl::Job::~Job() {
 109   net_log_.EndEvent(NetLog::TYPE_HTTP_STREAM_JOB);
 110
 111   // When we're in a partially constructed state, waiting for the user to
 112   // provide certificate handling information or authentication, we can't reuse
 113   // this stream at all.
 114   if (next_state_ == STATE_WAITING_USER_ACTION) {
 115     connection_->socket()->Disconnect();
 116     connection_.reset();
 117   }
 118
 119   if (pac_request_)
 120     session_->proxy_service()->CancelPacRequest(pac_request_);
 121
 122   // The stream could be in a partial state.  It is not reusable.
 123   if (stream_.get() && next_state_ != STATE_DONE)
 124     stream_->Close(true /* not reusable */);
 125 }
 126
 127 void HttpStreamFactoryImpl::Job::Start(Request* request) {
 128   DCHECK(request);
 129   request_ = request;
 130   StartInternal();
 131 }
 132
 133 int HttpStreamFactoryImpl::Job::Preconnect(int num_streams) {
 134   DCHECK_GT(num_streams, 0);
 135   base::WeakPtr<HttpServerProperties> http_server_properties =
 136       session_->http_server_properties();
 137   if (http_server_properties &&
 138       http_server_properties->SupportsRequestPriority(
 139           HostPortPair::FromURL(request_info_.url))) {
 140     num_streams_ = 1;
 141   } else {
 142     num_streams_ = num_streams;
 143   }
 144   return StartInternal();
 145 }
 146
 147 int HttpStreamFactoryImpl::Job::RestartTunnelWithProxyAuth(
 148     const AuthCredentials& credentials) {
 149   DCHECK(establishing_tunnel_);
 150   next_state_ = STATE_RESTART_TUNNEL_AUTH;
 151   stream_.reset();
 152   return RunLoop(OK);
 153 }
 154
 155 LoadState HttpStreamFactoryImpl::Job::GetLoadState() const {
 156   switch (next_state_) {
 157     case STATE_RESOLVE_PROXY_COMPLETE:
 158       return session_->proxy_service()->GetLoadState(pac_request_);
 159     case STATE_INIT_CONNECTION_COMPLETE:
 160     case STATE_CREATE_STREAM_COMPLETE:
 161       return using_quic_ ? LOAD_STATE_CONNECTING : connection_->GetLoadState();
 162     default:
 163       return LOAD_STATE_IDLE;
 164   }
 165 }
 166
 167 void HttpStreamFactoryImpl::Job::MarkAsAlternate(
 168     const GURL& original_url,
 169     AlternateProtocolInfo alternate) {
 170   DCHECK(!original_url_.get());
 171   original_url_.reset(new GURL(original_url));
 172   alternate_protocol_ = alternate;
 173   if (alternate.protocol == QUIC) {
 174     DCHECK(session_->params().enable_quic);
 175     using_quic_ = true;
 176   }
 177 }
 178
 179 void HttpStreamFactoryImpl::Job::WaitFor(Job* job) {
 180   DCHECK_EQ(STATE_NONE, next_state_);
 181   DCHECK_EQ(STATE_NONE, job->next_state_);
 182   DCHECK(!blocking_job_);
 183   DCHECK(!job->waiting_job_);
 184   blocking_job_ = job;
 185   job->waiting_job_ = this;
 186 }
 187
 188 void HttpStreamFactoryImpl::Job::Resume(Job* job) {
 189   DCHECK_EQ(blocking_job_, job);
 190   blocking_job_ = NULL;
 191
 192   // We know we're blocked if the next_state_ is STATE_WAIT_FOR_JOB_COMPLETE.
 193   // Unblock |this|.
 194   if (next_state_ == STATE_WAIT_FOR_JOB_COMPLETE) {
 195     base::MessageLoop::current()->PostTask(
 196         FROM_HERE,
 197         base::Bind(&HttpStreamFactoryImpl::Job::OnIOComplete,
 198                    ptr_factory_.GetWeakPtr(), OK));
 199   }
 200 }
 201
 202 void HttpStreamFactoryImpl::Job::Orphan(const Request* request) {
 203   DCHECK_EQ(request_, request);
 204   request_ = NULL;
 205   if (blocking_job_) {
 206     // We've been orphaned, but there's a job we're blocked on. Don't bother
 207     // racing, just cancel ourself.
 208     DCHECK(blocking_job_->waiting_job_);
 209     blocking_job_->waiting_job_ = NULL;
 210     blocking_job_ = NULL;
 211     if (stream_factory_->for_websockets_ &&
 212         connection_ && connection_->socket()) {
 213       connection_->socket()->Disconnect();
 214     }
 215     stream_factory_->OnOrphanedJobComplete(this);
 216   } else if (stream_factory_->for_websockets_) {
 217     // We cancel this job because a WebSocketHandshakeStream can't be created
 218     // without a WebSocketHandshakeStreamBase::CreateHelper which is stored in
 219     // the Request class and isn't accessible from this job.
 220     if (connection_ && connection_->socket()) {
 221       connection_->socket()->Disconnect();
 222     }
 223     stream_factory_->OnOrphanedJobComplete(this);
 224   }
 225 }
 226
 227 void HttpStreamFactoryImpl::Job::SetPriority(RequestPriority priority) {
 228   priority_ = priority;
 229   // TODO(akalin): Propagate this to |connection_| and maybe the
 230   // preconnect state.
 231 }
 232
 233 bool HttpStreamFactoryImpl::Job::was_npn_negotiated() const {
 234   return was_npn_negotiated_;
 235 }
 236
 237 NextProto HttpStreamFactoryImpl::Job::protocol_negotiated() const {
 238   return protocol_negotiated_;
 239 }
 240
 241 bool HttpStreamFactoryImpl::Job::using_spdy() const {
 242   return using_spdy_;
 243 }
 244
 245 const SSLConfig& HttpStreamFactoryImpl::Job::server_ssl_config() const {
 246   return server_ssl_config_;
 247 }
 248
 249 const SSLConfig& HttpStreamFactoryImpl::Job::proxy_ssl_config() const {
 250   return proxy_ssl_config_;
 251 }
 252
 253 const ProxyInfo& HttpStreamFactoryImpl::Job::proxy_info() const {
 254   return proxy_info_;
 255 }
 256
 257 void HttpStreamFactoryImpl::Job::GetSSLInfo() {
 258   DCHECK(using_ssl_);
 259   DCHECK(!establishing_tunnel_);
 260   DCHECK(connection_.get() && connection_->socket());
 261   SSLClientSocket* ssl_socket =
 262       static_cast<SSLClientSocket*>(connection_->socket());
 263   ssl_socket->GetSSLInfo(&ssl_info_);
 264 }
 265
 266 SpdySessionKey HttpStreamFactoryImpl::Job::GetSpdySessionKey() const {
 267   // In the case that we're using an HTTPS proxy for an HTTP url,
 268   // we look for a SPDY session *to* the proxy, instead of to the
 269   // origin server.
 270   PrivacyMode privacy_mode = request_info_.privacy_mode;
 271   if (IsHttpsProxyAndHttpUrl()) {
 272     return SpdySessionKey(proxy_info_.proxy_server().host_port_pair(),
 273                           ProxyServer::Direct(),
 274                           privacy_mode);
 275   } else {
 276     return SpdySessionKey(origin_,
 277                           proxy_info_.proxy_server(),
 278                           privacy_mode);
 279   }
 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, or
 287   // if we're running with force_spdy_always_.  crbug.com/133176
 288   // TODO(ricea): Add "wss" back to this list when SPDY WebSocket support is
 289   // working.
 290   return request_info_.url.SchemeIs("https") ||
 291          proxy_info_.proxy_server().is_https() ||
 292          session_->params().force_spdy_always;
 293 }
 294
 295 void HttpStreamFactoryImpl::Job::OnStreamReadyCallback() {
 296   DCHECK(stream_.get());
 297   DCHECK(!IsPreconnecting());
 298   DCHECK(!stream_factory_->for_websockets_);
 299   if (IsOrphaned()) {
 300     stream_factory_->OnOrphanedJobComplete(this);
 301   } else {
 302     request_->Complete(was_npn_negotiated(),
 303                        protocol_negotiated(),
 304                        using_spdy(),
 305                        net_log_);
 306     request_->OnStreamReady(this, server_ssl_config_, proxy_info_,
 307                             stream_.release());
 308   }
 309   // |this| may be deleted after this call.
 310 }
 311
 312 void HttpStreamFactoryImpl::Job::OnWebSocketHandshakeStreamReadyCallback() {
 313   DCHECK(websocket_stream_);
 314   DCHECK(!IsPreconnecting());
 315   DCHECK(stream_factory_->for_websockets_);
 316   // An orphaned WebSocket job will be closed immediately and
 317   // never be ready.
 318   DCHECK(!IsOrphaned());
 319   request_->Complete(was_npn_negotiated(),
 320                      protocol_negotiated(),
 321                      using_spdy(),
 322                      net_log_);
 323   request_->OnWebSocketHandshakeStreamReady(this,
 324                                             server_ssl_config_,
 325                                             proxy_info_,
 326                                             websocket_stream_.release());
 327   // |this| may be deleted after this call.
 328 }
 329
 330 void HttpStreamFactoryImpl::Job::OnNewSpdySessionReadyCallback() {
 331   DCHECK(stream_.get());
 332   DCHECK(!IsPreconnecting());
 333   DCHECK(using_spdy());
 334   // Note: an event loop iteration has passed, so |new_spdy_session_| may be
 335   // NULL at this point if the SpdySession closed immediately after creation.
 336   base::WeakPtr<SpdySession> spdy_session = new_spdy_session_;
 337   new_spdy_session_.reset();
 338
 339   // TODO(jgraettinger): Notify the factory, and let that notify |request_|,
 340   // rather than notifying |request_| directly.
 341   if (IsOrphaned()) {
 342     if (spdy_session) {
 343       stream_factory_->OnNewSpdySessionReady(
 344           spdy_session, spdy_session_direct_, server_ssl_config_, proxy_info_,
 345           was_npn_negotiated(), protocol_negotiated(), using_spdy(), net_log_);
 346     }
 347     stream_factory_->OnOrphanedJobComplete(this);
 348   } else {
 349     request_->OnNewSpdySessionReady(
 350         this, stream_.Pass(), spdy_session, spdy_session_direct_);
 351   }
 352   // |this| may be deleted after this call.
 353 }
 354
 355 void HttpStreamFactoryImpl::Job::OnStreamFailedCallback(int result) {
 356   DCHECK(!IsPreconnecting());
 357   if (IsOrphaned())
 358     stream_factory_->OnOrphanedJobComplete(this);
 359   else
 360     request_->OnStreamFailed(this, result, server_ssl_config_);
 361   // |this| may be deleted after this call.
 362 }
 363
 364 void HttpStreamFactoryImpl::Job::OnCertificateErrorCallback(
 365     int result, const SSLInfo& ssl_info) {
 366   DCHECK(!IsPreconnecting());
 367   if (IsOrphaned())
 368     stream_factory_->OnOrphanedJobComplete(this);
 369   else
 370     request_->OnCertificateError(this, result, server_ssl_config_, ssl_info);
 371   // |this| may be deleted after this call.
 372 }
 373
 374 void HttpStreamFactoryImpl::Job::OnNeedsProxyAuthCallback(
 375     const HttpResponseInfo& response,
 376     HttpAuthController* auth_controller) {
 377   DCHECK(!IsPreconnecting());
 378   if (IsOrphaned())
 379     stream_factory_->OnOrphanedJobComplete(this);
 380   else
 381     request_->OnNeedsProxyAuth(
 382         this, response, server_ssl_config_, proxy_info_, auth_controller);
 383   // |this| may be deleted after this call.
 384 }
 385
 386 void HttpStreamFactoryImpl::Job::OnNeedsClientAuthCallback(
 387     SSLCertRequestInfo* cert_info) {
 388   DCHECK(!IsPreconnecting());
 389   if (IsOrphaned())
 390     stream_factory_->OnOrphanedJobComplete(this);
 391   else
 392     request_->OnNeedsClientAuth(this, server_ssl_config_, cert_info);
 393   // |this| may be deleted after this call.
 394 }
 395
 396 void HttpStreamFactoryImpl::Job::OnHttpsProxyTunnelResponseCallback(
 397     const HttpResponseInfo& response_info,
 398     HttpStream* stream) {
 399   DCHECK(!IsPreconnecting());
 400   if (IsOrphaned())
 401     stream_factory_->OnOrphanedJobComplete(this);
 402   else
 403     request_->OnHttpsProxyTunnelResponse(
 404         this, response_info, server_ssl_config_, proxy_info_, stream);
 405   // |this| may be deleted after this call.
 406 }
 407
 408 void HttpStreamFactoryImpl::Job::OnPreconnectsComplete() {
 409   DCHECK(!request_);
 410   if (new_spdy_session_.get()) {
 411     stream_factory_->OnNewSpdySessionReady(new_spdy_session_,
 412                                            spdy_session_direct_,
 413                                            server_ssl_config_,
 414                                            proxy_info_,
 415                                            was_npn_negotiated(),
 416                                            protocol_negotiated(),
 417                                            using_spdy(),
 418                                            net_log_);
 419   }
 420   stream_factory_->OnPreconnectsComplete(this);
 421   // |this| may be deleted after this call.
 422 }
 423
 424 // static
 425 int HttpStreamFactoryImpl::Job::OnHostResolution(
 426     SpdySessionPool* spdy_session_pool,
 427     const SpdySessionKey& spdy_session_key,
 428     const AddressList& addresses,
 429     const BoundNetLog& net_log) {
 430   // It is OK to dereference spdy_session_pool, because the
 431   // ClientSocketPoolManager will be destroyed in the same callback that
 432   // destroys the SpdySessionPool.
 433   return
 434       spdy_session_pool->FindAvailableSession(spdy_session_key, net_log) ?
 435       ERR_SPDY_SESSION_ALREADY_EXISTS : OK;
 436 }
 437
 438 void HttpStreamFactoryImpl::Job::OnIOComplete(int result) {
 439   RunLoop(result);
 440 }
 441
 442 int HttpStreamFactoryImpl::Job::RunLoop(int result) {
 443   result = DoLoop(result);
 444
 445   if (result == ERR_IO_PENDING)
 446     return result;
 447
 448   // If there was an error, we should have already resumed the |waiting_job_|,
 449   // if there was one.
 450   DCHECK(result == OK || waiting_job_ == NULL);
 451
 452   if (IsPreconnecting()) {
 453     base::MessageLoop::current()->PostTask(
 454         FROM_HERE,
 455         base::Bind(&HttpStreamFactoryImpl::Job::OnPreconnectsComplete,
 456                    ptr_factory_.GetWeakPtr()));
 457     return ERR_IO_PENDING;
 458   }
 459
 460   if (IsCertificateError(result)) {
 461     // Retrieve SSL information from the socket.
 462     GetSSLInfo();
 463
 464     next_state_ = STATE_WAITING_USER_ACTION;
 465     base::MessageLoop::current()->PostTask(
 466         FROM_HERE,
 467         base::Bind(&HttpStreamFactoryImpl::Job::OnCertificateErrorCallback,
 468                    ptr_factory_.GetWeakPtr(), result, ssl_info_));
 469     return ERR_IO_PENDING;
 470   }
 471
 472   switch (result) {
 473     case ERR_PROXY_AUTH_REQUESTED: {
 474       UMA_HISTOGRAM_BOOLEAN("Net.ProxyAuthRequested.HasConnection",
 475                             connection_.get() != NULL);
 476       if (!connection_.get())
 477         return ERR_PROXY_AUTH_REQUESTED_WITH_NO_CONNECTION;
 478       CHECK(connection_->socket());
 479       CHECK(establishing_tunnel_);
 480
 481       next_state_ = STATE_WAITING_USER_ACTION;
 482       ProxyClientSocket* proxy_socket =
 483           static_cast<ProxyClientSocket*>(connection_->socket());
 484       base::MessageLoop::current()->PostTask(
 485           FROM_HERE,
 486           base::Bind(&Job::OnNeedsProxyAuthCallback, ptr_factory_.GetWeakPtr(),
 487                      *proxy_socket->GetConnectResponseInfo(),
 488                      proxy_socket->GetAuthController()));
 489       return ERR_IO_PENDING;
 490     }
 491
 492     case ERR_SSL_CLIENT_AUTH_CERT_NEEDED:
 493       base::MessageLoop::current()->PostTask(
 494           FROM_HERE,
 495           base::Bind(&Job::OnNeedsClientAuthCallback, ptr_factory_.GetWeakPtr(),
 496                      connection_->ssl_error_response_info().cert_request_info));
 497       return ERR_IO_PENDING;
 498
 499     case ERR_HTTPS_PROXY_TUNNEL_RESPONSE: {
 500       DCHECK(connection_.get());
 501       DCHECK(connection_->socket());
 502       DCHECK(establishing_tunnel_);
 503
 504       ProxyClientSocket* proxy_socket =
 505           static_cast<ProxyClientSocket*>(connection_->socket());
 506       base::MessageLoop::current()->PostTask(
 507           FROM_HERE,
 508           base::Bind(&Job::OnHttpsProxyTunnelResponseCallback,
 509                      ptr_factory_.GetWeakPtr(),
 510                      *proxy_socket->GetConnectResponseInfo(),
 511                      proxy_socket->CreateConnectResponseStream()));
 512       return ERR_IO_PENDING;
 513     }
 514
 515     case OK:
 516       job_status_ = STATUS_SUCCEEDED;
 517       MaybeMarkAlternateProtocolBroken();
 518       next_state_ = STATE_DONE;
 519       if (new_spdy_session_.get()) {
 520         base::MessageLoop::current()->PostTask(
 521             FROM_HERE,
 522             base::Bind(&Job::OnNewSpdySessionReadyCallback,
 523                        ptr_factory_.GetWeakPtr()));
 524       } else if (stream_factory_->for_websockets_) {
 525         DCHECK(websocket_stream_);
 526         base::MessageLoop::current()->PostTask(
 527             FROM_HERE,
 528             base::Bind(&Job::OnWebSocketHandshakeStreamReadyCallback,
 529                        ptr_factory_.GetWeakPtr()));
 530       } else {
 531         DCHECK(stream_.get());
 532         base::MessageLoop::current()->PostTask(
 533             FROM_HERE,
 534             base::Bind(&Job::OnStreamReadyCallback, ptr_factory_.GetWeakPtr()));
 535       }
 536       return ERR_IO_PENDING;
 537
 538     default:
 539       if (job_status_ != STATUS_BROKEN) {
 540         DCHECK_EQ(STATUS_RUNNING, job_status_);
 541         job_status_ = STATUS_FAILED;
 542         MaybeMarkAlternateProtocolBroken();
 543       }
 544       base::MessageLoop::current()->PostTask(
 545           FROM_HERE,
 546           base::Bind(&Job::OnStreamFailedCallback, ptr_factory_.GetWeakPtr(),
 547                      result));
 548       return ERR_IO_PENDING;
 549   }
 550 }
 551
 552 int HttpStreamFactoryImpl::Job::DoLoop(int result) {
 553   DCHECK_NE(next_state_, STATE_NONE);
 554   int rv = result;
 555   do {
 556     State state = next_state_;
 557     next_state_ = STATE_NONE;
 558     switch (state) {
 559       case STATE_START:
 560         DCHECK_EQ(OK, rv);
 561         rv = DoStart();
 562         break;
 563       case STATE_RESOLVE_PROXY:
 564         DCHECK_EQ(OK, rv);
 565         rv = DoResolveProxy();
 566         break;
 567       case STATE_RESOLVE_PROXY_COMPLETE:
 568         rv = DoResolveProxyComplete(rv);
 569         break;
 570       case STATE_WAIT_FOR_JOB:
 571         DCHECK_EQ(OK, rv);
 572         rv = DoWaitForJob();
 573         break;
 574       case STATE_WAIT_FOR_JOB_COMPLETE:
 575         rv = DoWaitForJobComplete(rv);
 576         break;
 577       case STATE_INIT_CONNECTION:
 578         DCHECK_EQ(OK, rv);
 579         rv = DoInitConnection();
 580         break;
 581       case STATE_INIT_CONNECTION_COMPLETE:
 582         rv = DoInitConnectionComplete(rv);
 583         break;
 584       case STATE_WAITING_USER_ACTION:
 585         rv = DoWaitingUserAction(rv);
 586         break;
 587       case STATE_RESTART_TUNNEL_AUTH:
 588         DCHECK_EQ(OK, rv);
 589         rv = DoRestartTunnelAuth();
 590         break;
 591       case STATE_RESTART_TUNNEL_AUTH_COMPLETE:
 592         rv = DoRestartTunnelAuthComplete(rv);
 593         break;
 594       case STATE_CREATE_STREAM:
 595         DCHECK_EQ(OK, rv);
 596         rv = DoCreateStream();
 597         break;
 598       case STATE_CREATE_STREAM_COMPLETE:
 599         rv = DoCreateStreamComplete(rv);
 600         break;
 601       default:
 602         NOTREACHED() << "bad state";
 603         rv = ERR_FAILED;
 604         break;
 605     }
 606   } while (rv != ERR_IO_PENDING && next_state_ != STATE_NONE);
 607   return rv;
 608 }
 609
 610 int HttpStreamFactoryImpl::Job::StartInternal() {
 611   CHECK_EQ(STATE_NONE, next_state_);
 612   next_state_ = STATE_START;
 613   int rv = RunLoop(OK);
 614   DCHECK_EQ(ERR_IO_PENDING, rv);
 615   return rv;
 616 }
 617
 618 int HttpStreamFactoryImpl::Job::DoStart() {
 619   origin_ = HostPortPair::FromURL(request_info_.url);
 620   origin_url_ = stream_factory_->ApplyHostMappingRules(
 621       request_info_.url, &origin_);
 622
 623   net_log_.BeginEvent(NetLog::TYPE_HTTP_STREAM_JOB,
 624                       base::Bind(&NetLogHttpStreamJobCallback,
 625                                  &request_info_.url, &origin_url_,
 626                                  priority_));
 627
 628   // Don't connect to restricted ports.
 629   bool is_port_allowed = IsPortAllowedByDefault(origin_.port());
 630   if (request_info_.url.SchemeIs("ftp")) {
 631     // Never share connection with other jobs for FTP requests.
 632     DCHECK(!waiting_job_);
 633
 634     is_port_allowed = IsPortAllowedByFtp(origin_.port());
 635   }
 636   if (!is_port_allowed && !IsPortAllowedByOverride(origin_.port())) {
 637     if (waiting_job_) {
 638       waiting_job_->Resume(this);
 639       waiting_job_ = NULL;
 640     }
 641     return ERR_UNSAFE_PORT;
 642   }
 643
 644   next_state_ = STATE_RESOLVE_PROXY;
 645   return OK;
 646 }
 647
 648 int HttpStreamFactoryImpl::Job::DoResolveProxy() {
 649   DCHECK(!pac_request_);
 650   DCHECK(session_);
 651
 652   next_state_ = STATE_RESOLVE_PROXY_COMPLETE;
 653
 654   if (request_info_.load_flags & LOAD_BYPASS_PROXY) {
 655     proxy_info_.UseDirect();
 656     return OK;
 657   }
 658
 659   return session_->proxy_service()->ResolveProxy(
 660       request_info_.url, request_info_.load_flags, &proxy_info_, io_callback_,
 661       &pac_request_, session_->network_delegate(), net_log_);
 662 }
 663
 664 int HttpStreamFactoryImpl::Job::DoResolveProxyComplete(int result) {
 665   pac_request_ = NULL;
 666
 667   if (result == OK) {
 668     // Remove unsupported proxies from the list.
 669     proxy_info_.RemoveProxiesWithoutScheme(
 670         ProxyServer::SCHEME_DIRECT | ProxyServer::SCHEME_QUIC |
 671         ProxyServer::SCHEME_HTTP | ProxyServer::SCHEME_HTTPS |
 672         ProxyServer::SCHEME_SOCKS4 | ProxyServer::SCHEME_SOCKS5);
 673
 674     if (proxy_info_.is_empty()) {
 675       // No proxies/direct to choose from. This happens when we don't support
 676       // any of the proxies in the returned list.
 677       result = ERR_NO_SUPPORTED_PROXIES;
 678     } else if (using_quic_ &&
 679                (!proxy_info_.is_quic() && !proxy_info_.is_direct())) {
 680       // QUIC can not be spoken to non-QUIC proxies.  This error should not be
 681       // user visible, because the non-alternate job should be resumed.
 682       result = ERR_NO_SUPPORTED_PROXIES;
 683     }
 684   }
 685
 686   if (result != OK) {
 687     if (waiting_job_) {
 688       waiting_job_->Resume(this);
 689       waiting_job_ = NULL;
 690     }
 691     return result;
 692   }
 693
 694   if (blocking_job_)
 695     next_state_ = STATE_WAIT_FOR_JOB;
 696   else
 697     next_state_ = STATE_INIT_CONNECTION;
 698   return OK;
 699 }
 700
 701 bool HttpStreamFactoryImpl::Job::ShouldForceSpdySSL() const {
 702   bool rv = session_->params().force_spdy_always &&
 703       session_->params().force_spdy_over_ssl;
 704   return rv && !session_->HasSpdyExclusion(origin_);
 705 }
 706
 707 bool HttpStreamFactoryImpl::Job::ShouldForceSpdyWithoutSSL() const {
 708   bool rv = session_->params().force_spdy_always &&
 709       !session_->params().force_spdy_over_ssl;
 710   return rv && !session_->HasSpdyExclusion(origin_);
 711 }
 712
 713 bool HttpStreamFactoryImpl::Job::ShouldForceQuic() const {
 714   return session_->params().enable_quic &&
 715     session_->params().origin_to_force_quic_on.Equals(origin_) &&
 716     proxy_info_.is_direct();
 717 }
 718
 719 int HttpStreamFactoryImpl::Job::DoWaitForJob() {
 720   DCHECK(blocking_job_);
 721   next_state_ = STATE_WAIT_FOR_JOB_COMPLETE;
 722   return ERR_IO_PENDING;
 723 }
 724
 725 int HttpStreamFactoryImpl::Job::DoWaitForJobComplete(int result) {
 726   DCHECK(!blocking_job_);
 727   DCHECK_EQ(OK, result);
 728   next_state_ = STATE_INIT_CONNECTION;
 729   return OK;
 730 }
 731
 732 int HttpStreamFactoryImpl::Job::DoInitConnection() {
 733   DCHECK(!blocking_job_);
 734   DCHECK(!connection_->is_initialized());
 735   DCHECK(proxy_info_.proxy_server().is_valid());
 736   next_state_ = STATE_INIT_CONNECTION_COMPLETE;
 737
 738   using_ssl_ = request_info_.url.SchemeIs("https") ||
 739       request_info_.url.SchemeIs("wss") || ShouldForceSpdySSL();
 740   using_spdy_ = false;
 741
 742   if (ShouldForceQuic())
 743     using_quic_ = true;
 744
 745   if (proxy_info_.is_quic())
 746     using_quic_ = true;
 747
 748   if (using_quic_) {
 749     DCHECK(session_->params().enable_quic);
 750     if (proxy_info_.is_quic() && !request_info_.url.SchemeIs("http")) {
 751       NOTREACHED();
 752       // TODO(rch): support QUIC proxies for HTTPS urls.
 753       return ERR_NOT_IMPLEMENTED;
 754     }
 755     HostPortPair destination = proxy_info_.is_quic() ?
 756         proxy_info_.proxy_server().host_port_pair() : origin_;
 757     next_state_ = STATE_INIT_CONNECTION_COMPLETE;
 758     bool secure_quic = using_ssl_ || proxy_info_.is_quic();
 759     int rv = quic_request_.Request(
 760         destination, secure_quic, request_info_.privacy_mode,
 761         request_info_.method, net_log_, io_callback_);
 762     if (rv == OK) {
 763       using_existing_quic_session_ = true;
 764     } else {
 765       // OK, there's no available QUIC session. Let |waiting_job_| resume
 766       // if it's paused.
 767       if (waiting_job_) {
 768         waiting_job_->Resume(this);
 769         waiting_job_ = NULL;
 770       }
 771     }
 772     return rv;
 773   }
 774
 775   // Check first if we have a spdy session for this group.  If so, then go
 776   // straight to using that.
 777   SpdySessionKey spdy_session_key = GetSpdySessionKey();
 778   base::WeakPtr<SpdySession> spdy_session =
 779       session_->spdy_session_pool()->FindAvailableSession(
 780           spdy_session_key, net_log_);
 781   if (spdy_session && CanUseExistingSpdySession()) {
 782     // If we're preconnecting, but we already have a SpdySession, we don't
 783     // actually need to preconnect any sockets, so we're done.
 784     if (IsPreconnecting())
 785       return OK;
 786     using_spdy_ = true;
 787     next_state_ = STATE_CREATE_STREAM;
 788     existing_spdy_session_ = spdy_session;
 789     return OK;
 790   } else if (request_ && !request_->HasSpdySessionKey() &&
 791              (using_ssl_ || ShouldForceSpdyWithoutSSL())) {
 792     // Update the spdy session key for the request that launched this job.
 793     request_->SetSpdySessionKey(spdy_session_key);
 794   }
 795
 796   // OK, there's no available SPDY session. Let |waiting_job_| resume if it's
 797   // paused.
 798
 799   if (waiting_job_) {
 800     waiting_job_->Resume(this);
 801     waiting_job_ = NULL;
 802   }
 803
 804   if (proxy_info_.is_http() || proxy_info_.is_https())
 805     establishing_tunnel_ = using_ssl_;
 806
 807   bool want_spdy_over_npn = original_url_ != NULL;
 808
 809   if (proxy_info_.is_https()) {
 810     InitSSLConfig(proxy_info_.proxy_server().host_port_pair(),
 811                   &proxy_ssl_config_,
 812                   true /* is a proxy server */);
 813     // Disable revocation checking for HTTPS proxies since the revocation
 814     // requests are probably going to need to go through the proxy too.
 815     proxy_ssl_config_.rev_checking_enabled = false;
 816   }
 817   if (using_ssl_) {
 818     InitSSLConfig(origin_, &server_ssl_config_,
 819                   false /* not a proxy server */);
 820   }
 821
 822   base::WeakPtr<HttpServerProperties> http_server_properties =
 823       session_->http_server_properties();
 824   if (http_server_properties) {
 825     http_server_properties->MaybeForceHTTP11(origin_, &server_ssl_config_);
 826     if (proxy_info_.is_http() || proxy_info_.is_https()) {
 827       http_server_properties->MaybeForceHTTP11(
 828           proxy_info_.proxy_server().host_port_pair(), &proxy_ssl_config_);
 829     }
 830   }
 831
 832   if (IsPreconnecting()) {
 833     DCHECK(!stream_factory_->for_websockets_);
 834     return PreconnectSocketsForHttpRequest(
 835         origin_url_,
 836         request_info_.extra_headers,
 837         request_info_.load_flags,
 838         priority_,
 839         session_,
 840         proxy_info_,
 841         ShouldForceSpdySSL(),
 842         want_spdy_over_npn,
 843         server_ssl_config_,
 844         proxy_ssl_config_,
 845         request_info_.privacy_mode,
 846         net_log_,
 847         num_streams_);
 848   }
 849
 850   // If we can't use a SPDY session, don't both checking for one after
 851   // the hostname is resolved.
 852   OnHostResolutionCallback resolution_callback = CanUseExistingSpdySession() ?
 853       base::Bind(&Job::OnHostResolution, session_->spdy_session_pool(),
 854                  GetSpdySessionKey()) :
 855       OnHostResolutionCallback();
 856   if (stream_factory_->for_websockets_) {
 857     // TODO(ricea): Re-enable NPN when WebSockets over SPDY is supported.
 858     SSLConfig websocket_server_ssl_config = server_ssl_config_;
 859     websocket_server_ssl_config.next_protos.clear();
 860     return InitSocketHandleForWebSocketRequest(
 861         origin_url_, request_info_.extra_headers, request_info_.load_flags,
 862         priority_, session_, proxy_info_, ShouldForceSpdySSL(),
 863         want_spdy_over_npn, websocket_server_ssl_config, proxy_ssl_config_,
 864         request_info_.privacy_mode, net_log_,
 865         connection_.get(), resolution_callback, io_callback_);
 866   }
 867
 868   return InitSocketHandleForHttpRequest(
 869       origin_url_, request_info_.extra_headers, request_info_.load_flags,
 870       priority_, session_, proxy_info_, ShouldForceSpdySSL(),
 871       want_spdy_over_npn, server_ssl_config_, proxy_ssl_config_,
 872       request_info_.privacy_mode, net_log_,
 873       connection_.get(), resolution_callback, io_callback_);
 874 }
 875
 876 int HttpStreamFactoryImpl::Job::DoInitConnectionComplete(int result) {
 877   if (IsPreconnecting()) {
 878     if (using_quic_)
 879       return result;
 880     DCHECK_EQ(OK, result);
 881     return OK;
 882   }
 883
 884   if (result == ERR_SPDY_SESSION_ALREADY_EXISTS) {
 885     // We found a SPDY connection after resolving the host.  This is
 886     // probably an IP pooled connection.
 887     SpdySessionKey spdy_session_key = GetSpdySessionKey();
 888     existing_spdy_session_ =
 889         session_->spdy_session_pool()->FindAvailableSession(
 890             spdy_session_key, net_log_);
 891     if (existing_spdy_session_) {
 892       using_spdy_ = true;
 893       next_state_ = STATE_CREATE_STREAM;
 894     } else {
 895       // It is possible that the spdy session no longer exists.
 896       ReturnToStateInitConnection(true /* close connection */);
 897     }
 898     return OK;
 899   }
 900
 901   // TODO(willchan): Make this a bit more exact. Maybe there are recoverable
 902   // errors, such as ignoring certificate errors for Alternate-Protocol.
 903   if (result < 0 && waiting_job_) {
 904     waiting_job_->Resume(this);
 905     waiting_job_ = NULL;
 906   }
 907
 908   // |result| may be the result of any of the stacked pools. The following
 909   // logic is used when determining how to interpret an error.
 910   // If |result| < 0:
 911   //   and connection_->socket() != NULL, then the SSL handshake ran and it
 912   //     is a potentially recoverable error.
 913   //   and connection_->socket == NULL and connection_->is_ssl_error() is true,
 914   //     then the SSL handshake ran with an unrecoverable error.
 915   //   otherwise, the error came from one of the other pools.
 916   bool ssl_started = using_ssl_ && (result == OK || connection_->socket() ||
 917                                     connection_->is_ssl_error());
 918
 919   if (ssl_started && (result == OK || IsCertificateError(result))) {
 920     if (using_quic_ && result == OK) {
 921       was_npn_negotiated_ = true;
 922       NextProto protocol_negotiated =
 923           SSLClientSocket::NextProtoFromString("quic/1+spdy/3");
 924       protocol_negotiated_ = protocol_negotiated;
 925     } else {
 926       SSLClientSocket* ssl_socket =
 927           static_cast<SSLClientSocket*>(connection_->socket());
 928       if (ssl_socket->WasNpnNegotiated()) {
 929         was_npn_negotiated_ = true;
 930         std::string proto;
 931         SSLClientSocket::NextProtoStatus status =
 932             ssl_socket->GetNextProto(&proto);
 933         NextProto protocol_negotiated =
 934             SSLClientSocket::NextProtoFromString(proto);
 935         protocol_negotiated_ = protocol_negotiated;
 936         net_log_.AddEvent(
 937             NetLog::TYPE_HTTP_STREAM_REQUEST_PROTO,
 938             base::Bind(&NetLogHttpStreamProtoCallback,
 939                        status, &proto));
 940         if (ssl_socket->was_spdy_negotiated())
 941           SwitchToSpdyMode();
 942       }
 943       if (ShouldForceSpdySSL())
 944         SwitchToSpdyMode();
 945     }
 946   } else if (proxy_info_.is_https() && connection_->socket() &&
 947         result == OK) {
 948     ProxyClientSocket* proxy_socket =
 949       static_cast<ProxyClientSocket*>(connection_->socket());
 950     if (proxy_socket->IsUsingSpdy()) {
 951       was_npn_negotiated_ = true;
 952       protocol_negotiated_ = proxy_socket->GetProtocolNegotiated();
 953       SwitchToSpdyMode();
 954     }
 955   }
 956
 957   // We may be using spdy without SSL
 958   if (ShouldForceSpdyWithoutSSL())
 959     SwitchToSpdyMode();
 960
 961   if (result == ERR_PROXY_AUTH_REQUESTED ||
 962       result == ERR_HTTPS_PROXY_TUNNEL_RESPONSE) {
 963     DCHECK(!ssl_started);
 964     // Other state (i.e. |using_ssl_|) suggests that |connection_| will have an
 965     // SSL socket, but there was an error before that could happen.  This
 966     // puts the in progress HttpProxy socket into |connection_| in order to
 967     // complete the auth (or read the response body).  The tunnel restart code
 968     // is careful to remove it before returning control to the rest of this
 969     // class.
 970     connection_.reset(connection_->release_pending_http_proxy_connection());
 971     return result;
 972   }
 973
 974   if (!ssl_started && result < 0 && original_url_.get()) {
 975     job_status_ = STATUS_BROKEN;
 976     MaybeMarkAlternateProtocolBroken();
 977     return result;
 978   }
 979
 980   if (using_quic_) {
 981     if (result < 0) {
 982       job_status_ = STATUS_BROKEN;
 983       MaybeMarkAlternateProtocolBroken();
 984       return result;
 985     }
 986     stream_ = quic_request_.ReleaseStream();
 987     next_state_ = STATE_NONE;
 988     return OK;
 989   }
 990
 991   if (result < 0 && !ssl_started)
 992     return ReconsiderProxyAfterError(result);
 993   establishing_tunnel_ = false;
 994
 995   if (connection_->socket()) {
 996     LogHttpConnectedMetrics(*connection_);
 997
 998     // We officially have a new connection.  Record the type.
 999     if (!connection_->is_reused()) {
1000       ConnectionType type = using_spdy_ ? CONNECTION_SPDY : CONNECTION_HTTP;
1001       UpdateConnectionTypeHistograms(type);
1002     }
1003   }
1004
1005   // Handle SSL errors below.
1006   if (using_ssl_) {
1007     DCHECK(ssl_started);
1008     if (IsCertificateError(result)) {
1009       if (using_spdy_ && original_url_.get() &&
1010           original_url_->SchemeIs("http")) {
1011         // We ignore certificate errors for http over spdy.
1012         spdy_certificate_error_ = result;
1013         result = OK;
1014       } else {
1015         result = HandleCertificateError(result);
1016         if (result == OK && !connection_->socket()->IsConnectedAndIdle()) {
1017           ReturnToStateInitConnection(true /* close connection */);
1018           return result;
1019         }
1020       }
1021     }
1022     if (result < 0)
1023       return result;
1024   }
1025
1026   next_state_ = STATE_CREATE_STREAM;
1027   return OK;
1028 }
1029
1030 int HttpStreamFactoryImpl::Job::DoWaitingUserAction(int result) {
1031   // This state indicates that the stream request is in a partially
1032   // completed state, and we've called back to the delegate for more
1033   // information.
1034
1035   // We're always waiting here for the delegate to call us back.
1036   return ERR_IO_PENDING;
1037 }
1038
1039 int HttpStreamFactoryImpl::Job::SetSpdyHttpStream(
1040     base::WeakPtr<SpdySession> session, bool direct) {
1041   // TODO(ricea): Restore the code for WebSockets over SPDY once it's
1042   // implemented.
1043   if (stream_factory_->for_websockets_)
1044     return ERR_NOT_IMPLEMENTED;
1045
1046   // TODO(willchan): Delete this code, because eventually, the
1047   // HttpStreamFactoryImpl will be creating all the SpdyHttpStreams, since it
1048   // will know when SpdySessions become available.
1049
1050   bool use_relative_url = direct || request_info_.url.SchemeIs("https");
1051   stream_.reset(new SpdyHttpStream(session, use_relative_url));
1052   return OK;
1053 }
1054
1055 int HttpStreamFactoryImpl::Job::DoCreateStream() {
1056   DCHECK(connection_->socket() || existing_spdy_session_.get() || using_quic_);
1057
1058   next_state_ = STATE_CREATE_STREAM_COMPLETE;
1059
1060   // We only set the socket motivation if we're the first to use
1061   // this socket.  Is there a race for two SPDY requests?  We really
1062   // need to plumb this through to the connect level.
1063   if (connection_->socket() && !connection_->is_reused())
1064     SetSocketMotivation();
1065
1066   if (!using_spdy_) {
1067     // We may get ftp scheme when fetching ftp resources through proxy.
1068     bool using_proxy = (proxy_info_.is_http() || proxy_info_.is_https()) &&
1069                        (request_info_.url.SchemeIs("http") ||
1070                         request_info_.url.SchemeIs("ftp"));
1071     if (stream_factory_->for_websockets_) {
1072       DCHECK(request_);
1073       DCHECK(request_->websocket_handshake_stream_create_helper());
1074       websocket_stream_.reset(
1075           request_->websocket_handshake_stream_create_helper()
1076               ->CreateBasicStream(connection_.Pass(), using_proxy));
1077     } else {
1078       stream_.reset(new HttpBasicStream(connection_.release(), using_proxy));
1079     }
1080     return OK;
1081   }
1082
1083   CHECK(!stream_.get());
1084
1085   bool direct = true;
1086   const ProxyServer& proxy_server = proxy_info_.proxy_server();
1087   PrivacyMode privacy_mode = request_info_.privacy_mode;
1088   if (IsHttpsProxyAndHttpUrl())
1089     direct = false;
1090
1091   if (existing_spdy_session_.get()) {
1092     // We picked up an existing session, so we don't need our socket.
1093     if (connection_->socket())
1094       connection_->socket()->Disconnect();
1095     connection_->Reset();
1096
1097     int set_result = SetSpdyHttpStream(existing_spdy_session_, direct);
1098     existing_spdy_session_.reset();
1099     return set_result;
1100   }
1101
1102   SpdySessionKey spdy_session_key(origin_, proxy_server, privacy_mode);
1103   if (IsHttpsProxyAndHttpUrl()) {
1104     // If we don't have a direct SPDY session, and we're using an HTTPS
1105     // proxy, then we might have a SPDY session to the proxy.
1106     // We never use privacy mode for connection to proxy server.
1107     spdy_session_key = SpdySessionKey(proxy_server.host_port_pair(),
1108                                       ProxyServer::Direct(),
1109                                       PRIVACY_MODE_DISABLED);
1110   }
1111
1112   SpdySessionPool* spdy_pool = session_->spdy_session_pool();
1113   base::WeakPtr<SpdySession> spdy_session =
1114       spdy_pool->FindAvailableSession(spdy_session_key, net_log_);
1115
1116   if (spdy_session) {
1117     return SetSpdyHttpStream(spdy_session, direct);
1118   }
1119
1120   spdy_session =
1121       spdy_pool->CreateAvailableSessionFromSocket(spdy_session_key,
1122                                                   connection_.Pass(),
1123                                                   net_log_,
1124                                                   spdy_certificate_error_,
1125                                                   using_ssl_);
1126   if (!spdy_session->HasAcceptableTransportSecurity()) {
1127     spdy_session->CloseSessionOnError(
1128         ERR_SPDY_INADEQUATE_TRANSPORT_SECURITY, "");
1129     return ERR_SPDY_INADEQUATE_TRANSPORT_SECURITY;
1130   }
1131
1132   new_spdy_session_ = spdy_session;
1133   spdy_session_direct_ = direct;
1134   const HostPortPair& host_port_pair = spdy_session_key.host_port_pair();
1135   base::WeakPtr<HttpServerProperties> http_server_properties =
1136       session_->http_server_properties();
1137   if (http_server_properties)
1138     http_server_properties->SetSupportsSpdy(host_port_pair, true);
1139
1140   // Create a SpdyHttpStream attached to the session;
1141   // OnNewSpdySessionReadyCallback is not called until an event loop
1142   // iteration later, so if the SpdySession is closed between then, allow
1143   // reuse state from the underlying socket, sampled by SpdyHttpStream,
1144   // bubble up to the request.
1145   return SetSpdyHttpStream(new_spdy_session_, spdy_session_direct_);
1146 }
1147
1148 int HttpStreamFactoryImpl::Job::DoCreateStreamComplete(int result) {
1149   if (result < 0)
1150     return result;
1151
1152   session_->proxy_service()->ReportSuccess(proxy_info_,
1153                                            session_->network_delegate());
1154   next_state_ = STATE_NONE;
1155   return OK;
1156 }
1157
1158 int HttpStreamFactoryImpl::Job::DoRestartTunnelAuth() {
1159   next_state_ = STATE_RESTART_TUNNEL_AUTH_COMPLETE;
1160   ProxyClientSocket* proxy_socket =
1161       static_cast<ProxyClientSocket*>(connection_->socket());
1162   return proxy_socket->RestartWithAuth(io_callback_);
1163 }
1164
1165 int HttpStreamFactoryImpl::Job::DoRestartTunnelAuthComplete(int result) {
1166   if (result == ERR_PROXY_AUTH_REQUESTED)
1167     return result;
1168
1169   if (result == OK) {
1170     // Now that we've got the HttpProxyClientSocket connected.  We have
1171     // to release it as an idle socket into the pool and start the connection
1172     // process from the beginning.  Trying to pass it in with the
1173     // SSLSocketParams might cause a deadlock since params are dispatched
1174     // interchangeably.  This request won't necessarily get this http proxy
1175     // socket, but there will be forward progress.
1176     establishing_tunnel_ = false;
1177     ReturnToStateInitConnection(false /* do not close connection */);
1178     return OK;
1179   }
1180
1181   return ReconsiderProxyAfterError(result);
1182 }
1183
1184 void HttpStreamFactoryImpl::Job::ReturnToStateInitConnection(
1185     bool close_connection) {
1186   if (close_connection && connection_->socket())
1187     connection_->socket()->Disconnect();
1188   connection_->Reset();
1189
1190   if (request_)
1191     request_->RemoveRequestFromSpdySessionRequestMap();
1192
1193   next_state_ = STATE_INIT_CONNECTION;
1194 }
1195
1196 void HttpStreamFactoryImpl::Job::SetSocketMotivation() {
1197   if (request_info_.motivation == HttpRequestInfo::PRECONNECT_MOTIVATED)
1198     connection_->socket()->SetSubresourceSpeculation();
1199   else if (request_info_.motivation == HttpRequestInfo::OMNIBOX_MOTIVATED)
1200     connection_->socket()->SetOmniboxSpeculation();
1201   // TODO(mbelshe): Add other motivations (like EARLY_LOAD_MOTIVATED).
1202 }
1203
1204 bool HttpStreamFactoryImpl::Job::IsHttpsProxyAndHttpUrl() const {
1205   if (!proxy_info_.is_https())
1206     return false;
1207   if (original_url_.get()) {
1208     // We currently only support Alternate-Protocol where the original scheme
1209     // is http.
1210     DCHECK(original_url_->SchemeIs("http"));
1211     return original_url_->SchemeIs("http");
1212   }
1213   return request_info_.url.SchemeIs("http");
1214 }
1215
1216 // Sets several fields of ssl_config for the given origin_server based on the
1217 // proxy info and other factors.
1218 void HttpStreamFactoryImpl::Job::InitSSLConfig(
1219     const HostPortPair& origin_server,
1220     SSLConfig* ssl_config,
1221     bool is_proxy) const {
1222   if (proxy_info_.is_https() && ssl_config->send_client_cert) {
1223     // When connecting through an HTTPS proxy, disable TLS False Start so
1224     // that client authentication errors can be distinguished between those
1225     // originating from the proxy server (ERR_PROXY_CONNECTION_FAILED) and
1226     // those originating from the endpoint (ERR_SSL_PROTOCOL_ERROR /
1227     // ERR_BAD_SSL_CLIENT_AUTH_CERT).
1228     // TODO(rch): This assumes that the HTTPS proxy will only request a
1229     // client certificate during the initial handshake.
1230     // http://crbug.com/59292
1231     ssl_config->false_start_enabled = false;
1232   }
1233
1234   enum {
1235     FALLBACK_NONE = 0,    // SSL version fallback did not occur.
1236     FALLBACK_SSL3 = 1,    // Fell back to SSL 3.0.
1237     FALLBACK_TLS1 = 2,    // Fell back to TLS 1.0.
1238     FALLBACK_TLS1_1 = 3,  // Fell back to TLS 1.1.
1239     FALLBACK_MAX
1240   };
1241
1242   int fallback = FALLBACK_NONE;
1243   if (ssl_config->version_fallback) {
1244     switch (ssl_config->version_max) {
1245       case SSL_PROTOCOL_VERSION_SSL3:
1246         fallback = FALLBACK_SSL3;
1247         break;
1248       case SSL_PROTOCOL_VERSION_TLS1:
1249         fallback = FALLBACK_TLS1;
1250         break;
1251       case SSL_PROTOCOL_VERSION_TLS1_1:
1252         fallback = FALLBACK_TLS1_1;
1253         break;
1254     }
1255   }
1256   UMA_HISTOGRAM_ENUMERATION("Net.ConnectionUsedSSLVersionFallback",
1257                             fallback, FALLBACK_MAX);
1258
1259   // We also wish to measure the amount of fallback connections for a host that
1260   // we know implements TLS up to 1.2. Ideally there would be no fallback here
1261   // but high numbers of SSLv3 would suggest that SSLv3 fallback is being
1262   // caused by network middleware rather than buggy HTTPS servers.
1263   const std::string& host = origin_server.host();
1264   if (!is_proxy &&
1265       host.size() >= 10 &&
1266       host.compare(host.size() - 10, 10, "google.com") == 0 &&
1267       (host.size() == 10 || host[host.size()-11] == '.')) {
1268     UMA_HISTOGRAM_ENUMERATION("Net.GoogleConnectionUsedSSLVersionFallback",
1269                               fallback, FALLBACK_MAX);
1270   }
1271
1272   if (request_info_.load_flags & LOAD_VERIFY_EV_CERT)
1273     ssl_config->verify_ev_cert = true;
1274
1275   // Disable Channel ID if privacy mode is enabled.
1276   if (request_info_.privacy_mode == PRIVACY_MODE_ENABLED)
1277     ssl_config->channel_id_enabled = false;
1278 }
1279
1280
1281 int HttpStreamFactoryImpl::Job::ReconsiderProxyAfterError(int error) {
1282   DCHECK(!pac_request_);
1283   DCHECK(session_);
1284
1285   // A failure to resolve the hostname or any error related to establishing a
1286   // TCP connection could be grounds for trying a new proxy configuration.
1287   //
1288   // Why do this when a hostname cannot be resolved?  Some URLs only make sense
1289   // to proxy servers.  The hostname in those URLs might fail to resolve if we
1290   // are still using a non-proxy config.  We need to check if a proxy config
1291   // now exists that corresponds to a proxy server that could load the URL.
1292   //
1293   switch (error) {
1294     case ERR_PROXY_CONNECTION_FAILED:
1295     case ERR_NAME_NOT_RESOLVED:
1296     case ERR_INTERNET_DISCONNECTED:
1297     case ERR_ADDRESS_UNREACHABLE:
1298     case ERR_CONNECTION_CLOSED:
1299     case ERR_CONNECTION_TIMED_OUT:
1300     case ERR_CONNECTION_RESET:
1301     case ERR_CONNECTION_REFUSED:
1302     case ERR_CONNECTION_ABORTED:
1303     case ERR_TIMED_OUT:
1304     case ERR_TUNNEL_CONNECTION_FAILED:
1305     case ERR_SOCKS_CONNECTION_FAILED:
1306     // This can happen in the case of trying to talk to a proxy using SSL, and
1307     // ending up talking to a captive portal that supports SSL instead.
1308     case ERR_PROXY_CERTIFICATE_INVALID:
1309     // This can happen when trying to talk SSL to a non-SSL server (Like a
1310     // captive portal).
1311     case ERR_SSL_PROTOCOL_ERROR:
1312       break;
1313     case ERR_SOCKS_CONNECTION_HOST_UNREACHABLE:
1314       // Remap the SOCKS-specific "host unreachable" error to a more
1315       // generic error code (this way consumers like the link doctor
1316       // know to substitute their error page).
1317       //
1318       // Note that if the host resolving was done by the SOCKS5 proxy, we can't
1319       // differentiate between a proxy-side "host not found" versus a proxy-side
1320       // "address unreachable" error, and will report both of these failures as
1321       // ERR_ADDRESS_UNREACHABLE.
1322       return ERR_ADDRESS_UNREACHABLE;
1323     default:
1324       return error;
1325   }
1326
1327   if (request_info_.load_flags & LOAD_BYPASS_PROXY) {
1328     return error;
1329   }
1330
1331   if (proxy_info_.is_https() && proxy_ssl_config_.send_client_cert) {
1332     session_->ssl_client_auth_cache()->Remove(
1333         proxy_info_.proxy_server().host_port_pair());
1334   }
1335
1336   int rv = session_->proxy_service()->ReconsiderProxyAfterError(
1337       request_info_.url, request_info_.load_flags, error, &proxy_info_,
1338       io_callback_, &pac_request_, session_->network_delegate(), net_log_);
1339   if (rv == OK || rv == ERR_IO_PENDING) {
1340     // If the error was during connection setup, there is no socket to
1341     // disconnect.
1342     if (connection_->socket())
1343       connection_->socket()->Disconnect();
1344     connection_->Reset();
1345     if (request_)
1346       request_->RemoveRequestFromSpdySessionRequestMap();
1347     next_state_ = STATE_RESOLVE_PROXY_COMPLETE;
1348   } else {
1349     // If ReconsiderProxyAfterError() failed synchronously, it means
1350     // there was nothing left to fall-back to, so fail the transaction
1351     // with the last connection error we got.
1352     // TODO(eroman): This is a confusing contract, make it more obvious.
1353     rv = error;
1354   }
1355
1356   return rv;
1357 }
1358
1359 int HttpStreamFactoryImpl::Job::HandleCertificateError(int error) {
1360   DCHECK(using_ssl_);
1361   DCHECK(IsCertificateError(error));
1362
1363   SSLClientSocket* ssl_socket =
1364       static_cast<SSLClientSocket*>(connection_->socket());
1365   ssl_socket->GetSSLInfo(&ssl_info_);
1366
1367   // Add the bad certificate to the set of allowed certificates in the
1368   // SSL config object. This data structure will be consulted after calling
1369   // RestartIgnoringLastError(). And the user will be asked interactively
1370   // before RestartIgnoringLastError() is ever called.
1371   SSLConfig::CertAndStatus bad_cert;
1372
1373   // |ssl_info_.cert| may be NULL if we failed to create
1374   // X509Certificate for whatever reason, but normally it shouldn't
1375   // happen, unless this code is used inside sandbox.
1376   if (ssl_info_.cert.get() == NULL ||
1377       !X509Certificate::GetDEREncoded(ssl_info_.cert->os_cert_handle(),
1378                                       &bad_cert.der_cert)) {
1379     return error;
1380   }
1381   bad_cert.cert_status = ssl_info_.cert_status;
1382   server_ssl_config_.allowed_bad_certs.push_back(bad_cert);
1383
1384   int load_flags = request_info_.load_flags;
1385   if (session_->params().ignore_certificate_errors)
1386     load_flags |= LOAD_IGNORE_ALL_CERT_ERRORS;
1387   if (ssl_socket->IgnoreCertError(error, load_flags))
1388     return OK;
1389   return error;
1390 }
1391
1392 void HttpStreamFactoryImpl::Job::SwitchToSpdyMode() {
1393   if (HttpStreamFactory::spdy_enabled())
1394     using_spdy_ = true;
1395 }
1396
1397 // static
1398 void HttpStreamFactoryImpl::Job::LogHttpConnectedMetrics(
1399     const ClientSocketHandle& handle) {
1400   UMA_HISTOGRAM_ENUMERATION("Net.HttpSocketType", handle.reuse_type(),
1401                             ClientSocketHandle::NUM_TYPES);
1402
1403   switch (handle.reuse_type()) {
1404     case ClientSocketHandle::UNUSED:
1405       UMA_HISTOGRAM_CUSTOM_TIMES("Net.HttpConnectionLatency",
1406                                  handle.setup_time(),
1407                                  base::TimeDelta::FromMilliseconds(1),
1408                                  base::TimeDelta::FromMinutes(10),
1409                                  100);
1410       break;
1411     case ClientSocketHandle::UNUSED_IDLE:
1412       UMA_HISTOGRAM_CUSTOM_TIMES("Net.SocketIdleTimeBeforeNextUse_UnusedSocket",
1413                                  handle.idle_time(),
1414                                  base::TimeDelta::FromMilliseconds(1),
1415                                  base::TimeDelta::FromMinutes(6),
1416                                  100);
1417       break;
1418     case ClientSocketHandle::REUSED_IDLE:
1419       UMA_HISTOGRAM_CUSTOM_TIMES("Net.SocketIdleTimeBeforeNextUse_ReusedSocket",
1420                                  handle.idle_time(),
1421                                  base::TimeDelta::FromMilliseconds(1),
1422                                  base::TimeDelta::FromMinutes(6),
1423                                  100);
1424       break;
1425     default:
1426       NOTREACHED();
1427       break;
1428   }
1429 }
1430
1431 bool HttpStreamFactoryImpl::Job::IsPreconnecting() const {
1432   DCHECK_GE(num_streams_, 0);
1433   return num_streams_ > 0;
1434 }
1435
1436 bool HttpStreamFactoryImpl::Job::IsOrphaned() const {
1437   return !IsPreconnecting() && !request_;
1438 }
1439
1440 void HttpStreamFactoryImpl::Job::ReportJobSuccededForRequest() {
1441   if (using_existing_quic_session_) {
1442     // If an existing session was used, then no TCP connection was
1443     // started.
1444     HistogramAlternateProtocolUsage(ALTERNATE_PROTOCOL_USAGE_NO_RACE);
1445   } else if (original_url_) {
1446     // This job was the alternate protocol job, and hence won the race.
1447     HistogramAlternateProtocolUsage(ALTERNATE_PROTOCOL_USAGE_WON_RACE);
1448   } else {
1449     // This job was the normal job, and hence the alternate protocol job lost
1450     // the race.
1451     HistogramAlternateProtocolUsage(ALTERNATE_PROTOCOL_USAGE_LOST_RACE);
1452   }
1453 }
1454
1455 void HttpStreamFactoryImpl::Job::MarkOtherJobComplete(const Job& job) {
1456   DCHECK_EQ(STATUS_RUNNING, other_job_status_);
1457   other_job_status_ = job.job_status_;
1458   other_job_alternate_protocol_ = job.alternate_protocol_;
1459   MaybeMarkAlternateProtocolBroken();
1460 }
1461
1462 void HttpStreamFactoryImpl::Job::MaybeMarkAlternateProtocolBroken() {
1463   if (job_status_ == STATUS_RUNNING || other_job_status_ == STATUS_RUNNING)
1464     return;
1465
1466   bool is_alternate_protocol_job = original_url_.get() != NULL;
1467   if (is_alternate_protocol_job) {
1468     if (job_status_ == STATUS_BROKEN && other_job_status_ == STATUS_SUCCEEDED) {
1469       HistogramBrokenAlternateProtocolLocation(
1470           BROKEN_ALTERNATE_PROTOCOL_LOCATION_HTTP_STREAM_FACTORY_IMPL_JOB_ALT);
1471       session_->http_server_properties()->SetBrokenAlternateProtocol(
1472           HostPortPair::FromURL(*original_url_));
1473     }
1474     return;
1475   }
1476
1477   if (job_status_ == STATUS_SUCCEEDED && other_job_status_ == STATUS_BROKEN) {
1478     HistogramBrokenAlternateProtocolLocation(
1479         BROKEN_ALTERNATE_PROTOCOL_LOCATION_HTTP_STREAM_FACTORY_IMPL_JOB_MAIN);
1480     session_->http_server_properties()->SetBrokenAlternateProtocol(
1481         HostPortPair::FromURL(request_info_.url));
1482   }
1483 }
1484
1485 }  // namespace net