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| 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 "content/browser/renderer_host/throttling_resource_handler.h" | |
| 6 | |
| 7 #include "content/public/browser/resource_throttle.h" | |
| 8 #include "content/public/common/resource_response.h" | |
| 9 | |
| 10 namespace content { | |
| 11 | |
| 12 ThrottlingResourceHandler::ThrottlingResourceHandler( | |
| 13 scoped_ptr<ResourceHandler> next_handler, | |
| 14 int child_id, | |
| 15 int request_id, | |
| 16 ScopedVector<ResourceThrottle> throttles) | |
| 17 : LayeredResourceHandler(next_handler.Pass()), | |
| 18 deferred_stage_(DEFERRED_NONE), | |
| 19 request_id_(request_id), | |
| 20 throttles_(throttles.Pass()), | |
| 21 index_(0), | |
| 22 cancelled_by_resource_throttle_(false) { | |
| 23 for (size_t i = 0; i < throttles_.size(); ++i) | |
| 24 throttles_[i]->set_controller(this); | |
| 25 } | |
| 26 | |
| 27 ThrottlingResourceHandler::~ThrottlingResourceHandler() { | |
| 28 } | |
| 29 | |
| 30 bool ThrottlingResourceHandler::OnRequestRedirected(int request_id, | |
| 31 const GURL& new_url, | |
| 32 ResourceResponse* response, | |
| 33 bool* defer) { | |
| 34 DCHECK_EQ(request_id_, request_id); | |
| 35 DCHECK(!cancelled_by_resource_throttle_); | |
| 36 | |
| 37 *defer = false; | |
| 38 while (index_ < throttles_.size()) { | |
| 39 throttles_[index_]->WillRedirectRequest(new_url, defer); | |
| 40 index_++; | |
| 41 if (cancelled_by_resource_throttle_) | |
| 42 return false; | |
| 43 if (*defer) { | |
| 44 deferred_stage_ = DEFERRED_REDIRECT; | |
| 45 deferred_url_ = new_url; | |
| 46 deferred_response_ = response; | |
| 47 return true; // Do not cancel. | |
| 48 } | |
| 49 } | |
| 50 | |
| 51 index_ = 0; // Reset for next time. | |
| 52 | |
| 53 return next_handler_->OnRequestRedirected(request_id, new_url, response, | |
| 54 defer); | |
| 55 } | |
| 56 | |
| 57 bool ThrottlingResourceHandler::OnWillStart(int request_id, | |
| 58 const GURL& url, | |
| 59 bool* defer) { | |
| 60 DCHECK_EQ(request_id_, request_id); | |
| 61 DCHECK(!cancelled_by_resource_throttle_); | |
| 62 | |
| 63 *defer = false; | |
| 64 while (index_ < throttles_.size()) { | |
| 65 throttles_[index_]->WillStartRequest(defer); | |
| 66 index_++; | |
| 67 if (cancelled_by_resource_throttle_) | |
| 68 return false; | |
| 69 if (*defer) { | |
| 70 deferred_stage_ = DEFERRED_START; | |
| 71 deferred_url_ = url; | |
| 72 return true; // Do not cancel. | |
| 73 } | |
| 74 } | |
| 75 | |
| 76 index_ = 0; // Reset for next time. | |
| 77 | |
| 78 return next_handler_->OnWillStart(request_id, url, defer); | |
| 79 } | |
| 80 | |
| 81 bool ThrottlingResourceHandler::OnResponseStarted(int request_id, | |
| 82 ResourceResponse* response, | |
| 83 bool* defer) { | |
| 84 DCHECK_EQ(request_id_, request_id); | |
| 85 DCHECK(!cancelled_by_resource_throttle_); | |
| 86 | |
| 87 while (index_ < throttles_.size()) { | |
| 88 throttles_[index_]->WillProcessResponse(defer); | |
| 89 index_++; | |
| 90 if (cancelled_by_resource_throttle_) | |
| 91 return false; | |
| 92 if (*defer) { | |
| 93 deferred_stage_ = DEFERRED_RESPONSE; | |
| 94 deferred_response_ = response; | |
| 95 return true; // Do not cancel. | |
| 96 } | |
| 97 } | |
| 98 | |
| 99 index_ = 0; // Reset for next time. | |
| 100 | |
| 101 return next_handler_->OnResponseStarted(request_id, response, defer); | |
| 102 } | |
| 103 | |
| 104 void ThrottlingResourceHandler::Cancel() { | |
| 105 cancelled_by_resource_throttle_ = true; | |
| 106 controller()->Cancel(); | |
| 107 } | |
| 108 | |
| 109 void ThrottlingResourceHandler::CancelAndIgnore() { | |
| 110 cancelled_by_resource_throttle_ = true; | |
| 111 controller()->CancelAndIgnore(); | |
| 112 } | |
| 113 | |
| 114 void ThrottlingResourceHandler::CancelWithError(int error_code) { | |
| 115 cancelled_by_resource_throttle_ = true; | |
| 116 controller()->CancelWithError(error_code); | |
| 117 } | |
| 118 | |
| 119 void ThrottlingResourceHandler::Resume() { | |
| 120 DCHECK(!cancelled_by_resource_throttle_); | |
| 121 | |
| 122 DeferredStage last_deferred_stage = deferred_stage_; | |
| 123 deferred_stage_ = DEFERRED_NONE; | |
| 124 switch (last_deferred_stage) { | |
| 125 case DEFERRED_NONE: | |
| 126 NOTREACHED(); | |
| 127 break; | |
| 128 case DEFERRED_START: | |
| 129 ResumeStart(); | |
| 130 break; | |
| 131 case DEFERRED_REDIRECT: | |
| 132 ResumeRedirect(); | |
| 133 break; | |
| 134 case DEFERRED_RESPONSE: | |
| 135 ResumeResponse(); | |
| 136 break; | |
| 137 } | |
| 138 } | |
| 139 | |
| 140 void ThrottlingResourceHandler::ResumeStart() { | |
| 141 DCHECK(!cancelled_by_resource_throttle_); | |
| 142 | |
| 143 GURL url = deferred_url_; | |
| 144 deferred_url_ = GURL(); | |
| 145 | |
| 146 bool defer = false; | |
| 147 if (!OnWillStart(request_id_, url, &defer)) { | |
| 148 controller()->Cancel(); | |
| 149 } else if (!defer) { | |
| 150 controller()->Resume(); | |
| 151 } | |
| 152 } | |
| 153 | |
| 154 void ThrottlingResourceHandler::ResumeRedirect() { | |
| 155 DCHECK(!cancelled_by_resource_throttle_); | |
| 156 | |
| 157 GURL new_url = deferred_url_; | |
| 158 deferred_url_ = GURL(); | |
| 159 scoped_refptr<ResourceResponse> response; | |
| 160 deferred_response_.swap(response); | |
| 161 | |
| 162 bool defer = false; | |
| 163 if (!OnRequestRedirected(request_id_, new_url, response, &defer)) { | |
| 164 controller()->Cancel(); | |
| 165 } else if (!defer) { | |
| 166 controller()->Resume(); | |
| 167 } | |
| 168 } | |
| 169 | |
| 170 void ThrottlingResourceHandler::ResumeResponse() { | |
| 171 DCHECK(!cancelled_by_resource_throttle_); | |
| 172 | |
| 173 scoped_refptr<ResourceResponse> response; | |
| 174 deferred_response_.swap(response); | |
| 175 | |
| 176 bool defer = false; | |
| 177 if (!OnResponseStarted(request_id_, response, &defer)) { | |
| 178 controller()->Cancel(); | |
| 179 } else if (!defer) { | |
| 180 controller()->Resume(); | |
| 181 } | |
| 182 } | |
| 183 | |
| 184 } // namespace content | |
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Chromium Code Reviews
Issue 11414299:
Add content/browser/loader/ for resource loading related classes. (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src/