net/url_request/url_request_job_manager.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/url_request/url_request_job_manager.h"
   6
   7 #include <algorithm>
   8
   9 #include "base/memory/singleton.h"
  10 #include "build/build_config.h"
  11 #include "base/strings/string_util.h"
  12 #include "net/base/load_flags.h"
  13 #include "net/base/net_errors.h"
  14 #include "net/base/network_delegate.h"
  15 #include "net/url_request/url_request_context.h"
  16 #include "net/url_request/url_request_error_job.h"
  17 #include "net/url_request/url_request_http_job.h"
  18 #include "net/url_request/url_request_job_factory.h"
  19
  20 namespace net {
  21
  22 // The built-in set of protocol factories
  23 namespace {
  24
  25 struct SchemeToFactory {
  26   const char* scheme;
  27   URLRequest::ProtocolFactory* factory;
  28 };
  29
  30 }  // namespace
  31
  32 static const SchemeToFactory kBuiltinFactories[] = {
  33   { "http", URLRequestHttpJob::Factory },
  34   { "https", URLRequestHttpJob::Factory },
  35
  36 #if !defined(OS_IOS)
  37   { "ws", URLRequestHttpJob::Factory },
  38   { "wss", URLRequestHttpJob::Factory },
  39 #endif  // !defined(OS_IOS)
  40 };
  41
  42 // static
  43 URLRequestJobManager* URLRequestJobManager::GetInstance() {
  44   return base::Singleton<URLRequestJobManager>::get();
  45 }
  46
  47 URLRequestJob* URLRequestJobManager::CreateJob(
  48     URLRequest* request, NetworkDelegate* network_delegate) const {
  49   DCHECK(IsAllowedThread());
  50
  51   // If we are given an invalid URL, then don't even try to inspect the scheme.
  52   if (!request->url().is_valid())
  53     return new URLRequestErrorJob(request, network_delegate, ERR_INVALID_URL);
  54
  55   // We do this here to avoid asking interceptors about unsupported schemes.
  56   const URLRequestJobFactory* job_factory =
  57       request->context()->job_factory();
  58
  59   const std::string& scheme = request->url().scheme();  // already lowercase
  60   if (!job_factory->IsHandledProtocol(scheme)) {
  61     return new URLRequestErrorJob(
  62         request, network_delegate, ERR_UNKNOWN_URL_SCHEME);
  63   }
  64
  65   // THREAD-SAFETY NOTICE:
  66   //   We do not need to acquire the lock here since we are only reading our
  67   //   data structures.  They should only be modified on the current thread.
  68
  69   // See if the request should be intercepted.
  70   //
  71   URLRequestJob* job = job_factory->MaybeCreateJobWithProtocolHandler(
  72       scheme, request, network_delegate);
  73   if (job)
  74     return job;
  75
  76   // See if the request should be handled by a built-in protocol factory.
  77   for (size_t i = 0; i < arraysize(kBuiltinFactories); ++i) {
  78     if (scheme == kBuiltinFactories[i].scheme) {
  79       URLRequestJob* new_job =
  80           (kBuiltinFactories[i].factory)(request, network_delegate, scheme);
  81       DCHECK(new_job);  // The built-in factories are not expected to fail!
  82       return new_job;
  83     }
  84   }
  85
  86   // If we reached here, then it means that a registered protocol factory
  87   // wasn't interested in handling the URL.  That is fairly unexpected, and we
  88   // don't have a specific error to report here :-(
  89   LOG(WARNING) << "Failed to map: " << request->url().spec();
  90   return new URLRequestErrorJob(request, network_delegate, ERR_FAILED);
  91 }
  92
  93 URLRequestJob* URLRequestJobManager::MaybeInterceptRedirect(
  94     URLRequest* request,
  95     NetworkDelegate* network_delegate,
  96     const GURL& location) const {
  97   DCHECK(IsAllowedThread());
  98   if (!request->url().is_valid() ||
  99       request->status().status() == URLRequestStatus::CANCELED) {
 100     return NULL;
 101   }
 102
 103   const URLRequestJobFactory* job_factory = NULL;
 104   job_factory = request->context()->job_factory();
 105
 106   const std::string& scheme = request->url().scheme();  // already lowercase
 107   if (!job_factory->IsHandledProtocol(scheme))
 108     return NULL;
 109
 110   URLRequestJob* job =
 111       request->context()->job_factory()->MaybeInterceptRedirect(
 112           request, network_delegate, location);
 113   if (job)
 114     return job;
 115
 116   return NULL;
 117 }
 118
 119 URLRequestJob* URLRequestJobManager::MaybeInterceptResponse(
 120     URLRequest* request, NetworkDelegate* network_delegate) const {
 121   DCHECK(IsAllowedThread());
 122   if (!request->url().is_valid() ||
 123       request->status().status() == URLRequestStatus::CANCELED) {
 124     return NULL;
 125   }
 126
 127   const URLRequestJobFactory* job_factory = NULL;
 128   job_factory = request->context()->job_factory();
 129
 130   const std::string& scheme = request->url().scheme();  // already lowercase
 131   if (!job_factory->IsHandledProtocol(scheme))
 132     return NULL;
 133
 134   URLRequestJob* job =
 135       request->context()->job_factory()->MaybeInterceptResponse(
 136           request, network_delegate);
 137   if (job)
 138     return job;
 139
 140   return NULL;
 141 }
 142
 143 // static
 144 bool URLRequestJobManager::SupportsScheme(const std::string& scheme) {
 145   for (size_t i = 0; i < arraysize(kBuiltinFactories); ++i) {
 146     if (base::LowerCaseEqualsASCII(scheme, kBuiltinFactories[i].scheme))
 147       return true;
 148   }
 149
 150   return false;
 151 }
 152
 153 URLRequestJobManager::URLRequestJobManager() {
 154 }
 155
 156 URLRequestJobManager::~URLRequestJobManager() {}
 157
 158 }  // namespace net