JobController 1: Adding a new class HttpStreamFactoryImpl::JobController

net/http/http_stream_factory_impl.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/http/http_stream_factory_impl.h"
 
 #include <string>
 
 #include "base/logging.h"
-#include "base/metrics/histogram_macros.h"
+#include "base/memory/ptr_util.h"
 #include "base/stl_util.h"
 #include "base/strings/string_util.h"
 #include "net/http/http_network_session.h"
 #include "net/http/http_server_properties.h"
 #include "net/http/http_stream_factory_impl_job.h"
+#include "net/http/http_stream_factory_impl_job_controller.h"
 #include "net/http/http_stream_factory_impl_request.h"
 #include "net/http/transport_security_state.h"
 #include "net/log/net_log.h"
 #include "net/quic/quic_server_id.h"
 #include "net/spdy/bidirectional_stream_spdy_impl.h"
 #include "net/spdy/spdy_http_stream.h"
 #include "url/gurl.h"
 
 namespace net {
 
+class DefaultJobFactory : public HttpStreamFactoryImpl::JobFactory {

[Ryan Hamilton, 2016/06/15 23:34:20]

nit: can you wrap this in namespace {}

nit: class comment, which can be just a single line. It's pretty self
explanatory... but still :>

[Zhongyi Shi, 2016/06/16 00:02:31]

Done.

+ public:
+  DefaultJobFactory() {}
+
+  ~DefaultJobFactory() override {}
+
+  HttpStreamFactoryImpl::Job* CreateJob(
+      HttpStreamFactoryImpl::Job::Delegate* delegate,
+      HttpStreamFactoryImpl::JobType job_type,
+      HttpNetworkSession* session,
+      const HttpRequestInfo& request_info,
+      RequestPriority priority,
+      const SSLConfig& server_ssl_config,
+      const SSLConfig& proxy_ssl_config,
+      HostPortPair destination,
+      GURL origin_url,
+      NetLog* net_log) override {
+    return new HttpStreamFactoryImpl::Job(
+        delegate, job_type, session, request_info, priority, server_ssl_config,
+        proxy_ssl_config, destination, origin_url, net_log);
+  }
+
+  HttpStreamFactoryImpl::Job* CreateJob(
+      HttpStreamFactoryImpl::Job::Delegate* delegate,
+      HttpStreamFactoryImpl::JobType job_type,
+      HttpNetworkSession* session,
+      const HttpRequestInfo& request_info,
+      RequestPriority priority,
+      const SSLConfig& server_ssl_config,
+      const SSLConfig& proxy_ssl_config,
+      HostPortPair destination,
+      GURL origin_url,
+      AlternativeService alternative_service,
+      NetLog* net_log) override {
+    return new HttpStreamFactoryImpl::Job(
+        delegate, job_type, session, request_info, priority, server_ssl_config,
+        proxy_ssl_config, destination, origin_url, alternative_service,
+        net_log);
+  }
+};
+
 HttpStreamFactoryImpl::HttpStreamFactoryImpl(HttpNetworkSession* session,
                                              bool for_websockets)
     : session_(session),
+      job_factory_(new DefaultJobFactory()),
       for_websockets_(for_websockets) {}
 
 HttpStreamFactoryImpl::~HttpStreamFactoryImpl() {
   DCHECK(request_map_.empty());
   DCHECK(spdy_session_request_map_.empty());
-
-  std::set<const Job*> tmp_job_set;
-  tmp_job_set.swap(orphaned_job_set_);
-  STLDeleteContainerPointers(tmp_job_set.begin(), tmp_job_set.end());
-  DCHECK(orphaned_job_set_.empty());
-
-  tmp_job_set.clear();
-  tmp_job_set.swap(preconnect_job_set_);
-  STLDeleteContainerPointers(tmp_job_set.begin(), tmp_job_set.end());
-  DCHECK(preconnect_job_set_.empty());
+  job_controller_set_.clear();

[Ryan Hamilton, 2016/06/15 23:34:20]

nit: Is this required, or will the default destruction do the right thing?

[Zhongyi Shi, 2016/06/16 00:02:31]

Done.

 }
 
 HttpStreamRequest* HttpStreamFactoryImpl::RequestStream(
     const HttpRequestInfo& request_info,
     RequestPriority priority,
     const SSLConfig& server_ssl_config,
     const SSLConfig& proxy_ssl_config,
     HttpStreamRequest::Delegate* delegate,
     const BoundNetLog& net_log) {
   DCHECK(!for_websockets_);
@@ skipping 35 matching lines @@
 HttpStreamRequest* HttpStreamFactoryImpl::RequestStreamInternal(
     const HttpRequestInfo& request_info,
     RequestPriority priority,
     const SSLConfig& server_ssl_config,
     const SSLConfig& proxy_ssl_config,
     HttpStreamRequest::Delegate* delegate,
     WebSocketHandshakeStreamBase::CreateHelper*
         websocket_handshake_stream_create_helper,
     HttpStreamRequest::StreamType stream_type,
     const BoundNetLog& net_log) {
-  Request* request = new Request(request_info.url, this, delegate,
-                                 websocket_handshake_stream_create_helper,
-                                 net_log, stream_type);
-  HostPortPair destination(HostPortPair::FromURL(request_info.url));
-  GURL origin_url = ApplyHostMappingRules(request_info.url, &destination);
+  JobController* job_controller =
+      new JobController(this, delegate, session_, job_factory_.get());
+  job_controller_set_.insert(base::WrapUnique(job_controller));
 
-  Job* job =
-      new Job(this, session_, request_info, priority, server_ssl_config,
-              proxy_ssl_config, destination, origin_url, net_log.net_log());
-  request->AttachJob(job);
+  Request* request = job_controller->Start(
+      request_info, delegate, websocket_handshake_stream_create_helper, net_log,
+      stream_type, priority, server_ssl_config, proxy_ssl_config);
 
-  const AlternativeService alternative_service =
-      GetAlternativeServiceFor(request_info, delegate, stream_type);
-
-  if (alternative_service.protocol != UNINITIALIZED_ALTERNATE_PROTOCOL) {
-    // Never share connection with other jobs for FTP requests.
-    DVLOG(1) << "Selected alternative service (host: "
-             << alternative_service.host_port_pair().host()
-             << " port: " << alternative_service.host_port_pair().port() << ")";
-
-    DCHECK(!request_info.url.SchemeIs("ftp"));
-    HostPortPair alternative_destination(alternative_service.host_port_pair());
-    ignore_result(
-        ApplyHostMappingRules(request_info.url, &alternative_destination));
-
-    Job* alternative_job =
-        new Job(this, session_, request_info, priority, server_ssl_config,
-                proxy_ssl_config, alternative_destination, origin_url,
-                alternative_service, net_log.net_log());
-    request->AttachJob(alternative_job);
-
-    job->WaitFor(alternative_job);
-    // Make sure to wait until we call WaitFor(), before starting
-    // |alternative_job|, otherwise |alternative_job| will not notify |job|
-    // appropriately.
-    alternative_job->Start(request);
-  }
-
-  // Even if |alternative_job| has already finished, it will not have notified
-  // the request yet, since we defer that to the next iteration of the
-  // MessageLoop, so starting |job| is always safe.
-  job->Start(request);
   return request;
 }
 
 void HttpStreamFactoryImpl::PreconnectStreams(
     int num_streams,
     const HttpRequestInfo& request_info) {
   SSLConfig server_ssl_config;
   SSLConfig proxy_ssl_config;
   session_->GetSSLConfig(request_info, &server_ssl_config, &proxy_ssl_config);
   // All preconnects should perform EV certificate verification.
   server_ssl_config.verify_ev_cert = true;
   proxy_ssl_config.verify_ev_cert = true;
 
   DCHECK(!for_websockets_);
-  AlternativeService alternative_service = GetAlternativeServiceFor(
-      request_info, nullptr, HttpStreamRequest::HTTP_STREAM);
-  HostPortPair destination(HostPortPair::FromURL(request_info.url));
-  GURL origin_url = ApplyHostMappingRules(request_info.url, &destination);
-  if (alternative_service.protocol != UNINITIALIZED_ALTERNATE_PROTOCOL) {
-    if (session_->params().quic_disable_preconnect_if_0rtt &&
-        alternative_service.protocol == QUIC &&
-        session_->quic_stream_factory()->ZeroRTTEnabledFor(QuicServerId(
-            alternative_service.host_port_pair(), request_info.privacy_mode))) {
-      return;
-    }
-    destination = alternative_service.host_port_pair();
-    ignore_result(ApplyHostMappingRules(request_info.url, &destination));
-  }
-  // Due to how the socket pools handle priorities and idle sockets, only IDLE
-  // priority currently makes sense for preconnects. The priority for
-  // preconnects is currently ignored (see RequestSocketsForPool()), but could
-  // be used at some point for proxy resolution or something.
-  Job* job = new Job(this, session_, request_info, IDLE, server_ssl_config,
-                     proxy_ssl_config, destination, origin_url,
-                     alternative_service, session_->net_log());
-  preconnect_job_set_.insert(job);
-  job->Preconnect(num_streams);
+
+  JobController* job_controller =
+      new JobController(this, nullptr, session_, job_factory_.get());
+  job_controller_set_.insert(base::WrapUnique(job_controller));
+  job_controller->Preconnect(num_streams, request_info, server_ssl_config,
+                             proxy_ssl_config);
 }
 
 const HostMappingRules* HttpStreamFactoryImpl::GetHostMappingRules() const {
   return session_->params().host_mapping_rules;
 }
 
-AlternativeService HttpStreamFactoryImpl::GetAlternativeServiceFor(
-    const HttpRequestInfo& request_info,
-    HttpStreamRequest::Delegate* delegate,
-    HttpStreamRequest::StreamType stream_type) {
-  AlternativeService alternative_service =
-      GetAlternativeServiceForInternal(request_info, delegate, stream_type);
-  AlternativeServiceType type;
-  if (alternative_service.protocol == UNINITIALIZED_ALTERNATE_PROTOCOL) {
-    type = NO_ALTERNATIVE_SERVICE;
-  } else if (alternative_service.protocol == QUIC) {
-    if (request_info.url.host() == alternative_service.host) {
-      type = QUIC_SAME_DESTINATION;
-    } else {
-      type = QUIC_DIFFERENT_DESTINATION;
-    }
-  } else {
-    if (request_info.url.host() == alternative_service.host) {
-      type = NOT_QUIC_SAME_DESTINATION;
-    } else {
-      type = NOT_QUIC_DIFFERENT_DESTINATION;
-    }
-  }
-  UMA_HISTOGRAM_ENUMERATION("Net.AlternativeServiceTypeForRequest", type,
-                            MAX_ALTERNATIVE_SERVICE_TYPE);
-  return alternative_service;
-}
-
-AlternativeService HttpStreamFactoryImpl::GetAlternativeServiceForInternal(
-    const HttpRequestInfo& request_info,
-    HttpStreamRequest::Delegate* delegate,
-    HttpStreamRequest::StreamType stream_type) {
-  GURL original_url = request_info.url;
-
-  if (original_url.SchemeIs("ftp"))
-    return AlternativeService();
-
-  if (!session_->params().enable_alternative_service_for_insecure_origins &&
-      !original_url.SchemeIs("https"))
-    return AlternativeService();
-
-  url::SchemeHostPort origin(original_url);
-  HttpServerProperties& http_server_properties =
-      *session_->http_server_properties();
-  const AlternativeServiceVector alternative_service_vector =
-      http_server_properties.GetAlternativeServices(origin);
-  if (alternative_service_vector.empty())
-    return AlternativeService();
-
-  bool quic_advertised = false;
-  bool quic_all_broken = true;
-
-  const bool enable_different_host =
-      session_->params().enable_alternative_service_with_different_host;
-
-  // First Alt-Svc that is not marked as broken.
-  AlternativeService first_alternative_service;
-
-  for (const AlternativeService& alternative_service :
-       alternative_service_vector) {
-    DCHECK(IsAlternateProtocolValid(alternative_service.protocol));
-    if (!quic_advertised && alternative_service.protocol == QUIC)
-      quic_advertised = true;
-    if (http_server_properties.IsAlternativeServiceBroken(
-            alternative_service)) {
-      HistogramAlternateProtocolUsage(ALTERNATE_PROTOCOL_USAGE_BROKEN);
-      continue;
-    }
-
-    if (origin.host() != alternative_service.host && !enable_different_host)
-      continue;
-
-    // Some shared unix systems may have user home directories (like
-    // http://foo.com/~mike) which allow users to emit headers.  This is a bad
-    // idea already, but with Alternate-Protocol, it provides the ability for a
-    // single user on a multi-user system to hijack the alternate protocol.
-    // These systems also enforce ports <1024 as restricted ports.  So don't
-    // allow protocol upgrades to user-controllable ports.
-    const int kUnrestrictedPort = 1024;
-    if (!session_->params().enable_user_alternate_protocol_ports &&
-        (alternative_service.port >= kUnrestrictedPort &&
-         origin.port() < kUnrestrictedPort))
-      continue;
-
-    if (alternative_service.protocol >= NPN_SPDY_MINIMUM_VERSION &&
-        alternative_service.protocol <= NPN_SPDY_MAXIMUM_VERSION) {
-      if (!HttpStreamFactory::spdy_enabled())
-        continue;
-
-      // TODO(bnc): Re-enable when https://crbug.com/615413 is fixed.
-      if (origin.host() != alternative_service.host)
-        continue;
-
-      // Cache this entry if we don't have a non-broken Alt-Svc yet.
-      if (first_alternative_service.protocol ==
-          UNINITIALIZED_ALTERNATE_PROTOCOL)
-        first_alternative_service = alternative_service;
-      continue;
-    }
-
-    DCHECK_EQ(QUIC, alternative_service.protocol);
-    quic_all_broken = false;
-    if (!session_->params().enable_quic)
-      continue;
-
-    if (!IsQuicWhitelistedForHost(origin.host()))
-      continue;
-
-    if (stream_type == HttpStreamRequest::BIDIRECTIONAL_STREAM &&
-        session_->params().quic_disable_bidirectional_streams) {
-      continue;
-    }
-
-    if (session_->quic_stream_factory()->IsQuicDisabled(
-            alternative_service.port))
-      continue;
-
-    if (!original_url.SchemeIs("https"))
-      continue;
-
-    // Check whether there is an existing QUIC session to use for this origin.
-    HostPortPair mapped_origin(origin.host(), origin.port());
-    ignore_result(ApplyHostMappingRules(original_url, &mapped_origin));
-    QuicServerId server_id(mapped_origin, request_info.privacy_mode);
-
-    HostPortPair destination(alternative_service.host_port_pair());
-    ignore_result(ApplyHostMappingRules(original_url, &destination));
-
-    if (session_->quic_stream_factory()->CanUseExistingSession(server_id,
-                                                               destination)) {
-      return alternative_service;
-    }
-
-    // Cache this entry if we don't have a non-broken Alt-Svc yet.
-    if (first_alternative_service.protocol == UNINITIALIZED_ALTERNATE_PROTOCOL)
-      first_alternative_service = alternative_service;
-  }
-
-  // Ask delegate to mark QUIC as broken for the origin.
-  if (quic_advertised && quic_all_broken && delegate != nullptr)
-    delegate->OnQuicBroken();
-
-  return first_alternative_service;
-}
-
-void HttpStreamFactoryImpl::OrphanJob(Job* job, const Request* request) {
-  DCHECK(ContainsKey(request_map_, job));
-  DCHECK_EQ(request_map_[job], request);
-  DCHECK(!ContainsKey(orphaned_job_set_, job));
-
-  request_map_.erase(job);
-
-  orphaned_job_set_.insert(job);
-  job->Orphan(request);
-}
-
 void HttpStreamFactoryImpl::OnNewSpdySessionReady(
     const base::WeakPtr<SpdySession>& spdy_session,
     bool direct,
     const SSLConfig& used_ssl_config,
     const ProxyInfo& used_proxy_info,
     bool was_npn_negotiated,
     NextProto protocol_negotiated,
     bool using_spdy,
     const BoundNetLog& net_log) {
   while (true) {
@@ skipping 11 matching lines @@
       break;
     Request* request = *spdy_session_request_map_[spdy_session_key].begin();
     request->Complete(was_npn_negotiated, protocol_negotiated, using_spdy);
     if (for_websockets_) {
       // TODO(ricea): Restore this code path when WebSocket over SPDY
       // implementation is ready.
       NOTREACHED();
     } else if (request->stream_type() ==
                HttpStreamRequest::BIDIRECTIONAL_STREAM) {
       request->OnBidirectionalStreamImplReady(
-          nullptr, used_ssl_config, used_proxy_info,
+          used_ssl_config, used_proxy_info,
           new BidirectionalStreamSpdyImpl(spdy_session));
     } else {
       bool use_relative_url = direct || request->url().SchemeIs("https");
       request->OnStreamReady(
-          nullptr, used_ssl_config, used_proxy_info,
+          used_ssl_config, used_proxy_info,
           new SpdyHttpStream(spdy_session, use_relative_url));
     }
   }
   // TODO(mbelshe): Alert other valid requests.
 }
 
-void HttpStreamFactoryImpl::OnOrphanedJobComplete(const Job* job) {
-  orphaned_job_set_.erase(job);
-  delete job;
-}
-
-void HttpStreamFactoryImpl::OnPreconnectsComplete(const Job* job) {
-  preconnect_job_set_.erase(job);
-  delete job;
-  OnPreconnectsCompleteInternal();
-}
-
-bool HttpStreamFactoryImpl::IsQuicWhitelistedForHost(const std::string& host) {
-  bool whitelist_needed = false;
-  for (QuicVersion version : session_->params().quic_supported_versions) {
-    if (version <= QUIC_VERSION_30) {
-      whitelist_needed = true;
-      break;
+void HttpStreamFactoryImpl::OnJobControllerComplete(JobController* controller) {
+  for (auto it = job_controller_set_.begin(); it != job_controller_set_.end();
+       ++it) {
+    if (it->get() == controller) {
+      job_controller_set_.erase(it);
+      return;
     }
   }
-
-  // The QUIC whitelist is not needed in QUIC versions after 30.
-  if (!whitelist_needed)
-    return true;
-
-  if (session_->params().transport_security_state->IsGooglePinnedHost(host))
-    return true;
-
-  return ContainsKey(session_->params().quic_host_whitelist,
-                     base::ToLowerASCII(host));
+  NOTREACHED();
 }
 
 }  // namespace net