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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #include "content/browser/loader/throttling_resource_handler.h" | 5 #include "content/browser/loader/throttling_resource_handler.h" |
| 6 | 6 |
| 7 #include <utility> | 7 #include <utility> |
| 8 | 8 |
| 9 #include "content/browser/loader/resource_request_info_impl.h" | 9 #include "content/browser/loader/resource_request_info_impl.h" |
| 10 #include "content/public/browser/resource_throttle.h" | 10 #include "content/public/browser/resource_controller.h" |
| 11 #include "content/public/common/resource_response.h" | 11 #include "content/public/common/resource_response.h" |
| 12 #include "net/url_request/url_request.h" | 12 #include "net/url_request/url_request.h" |
| 13 | 13 |
| 14 namespace content { | 14 namespace content { |
| 15 | 15 |
| 16 ThrottlingResourceHandler::ThrottlingResourceHandler( | 16 ThrottlingResourceHandler::ThrottlingResourceHandler( |
| 17 std::unique_ptr<ResourceHandler> next_handler, | 17 std::unique_ptr<ResourceHandler> next_handler, |
| 18 net::URLRequest* request, | 18 net::URLRequest* request, |
| 19 ScopedVector<ResourceThrottle> throttles) | 19 ScopedVector<ResourceThrottle> throttles) |
| 20 : LayeredResourceHandler(request, std::move(next_handler)), | 20 : LayeredResourceHandler(request, std::move(next_handler)), |
| 21 deferred_stage_(DEFERRED_NONE), | 21 deferred_stage_(DEFERRED_NONE), |
| 22 throttles_(std::move(throttles)), | 22 throttles_(std::move(throttles)), |
| 23 next_index_(0), | 23 next_index_(0), |
| 24 cancelled_by_resource_throttle_(false) { | 24 cancelled_by_resource_throttle_(false) { |
| 25 for (size_t i = 0; i < throttles_.size(); ++i) { | 25 for (size_t i = 0; i < throttles_.size(); ++i) { |
| 26 throttles_[i]->set_controller(this); | 26 throttles_[i]->set_delegate(this); |
| 27 // Throttles must have a name, as otherwise, bugs where a throttle fails | 27 // Throttles must have a name, as otherwise, bugs where a throttle fails |
| 28 // to resume a request can be very difficult to debug. | 28 // to resume a request can be very difficult to debug. |
| 29 DCHECK(throttles_[i]->GetNameForLogging()); | 29 DCHECK(throttles_[i]->GetNameForLogging()); |
| 30 } | 30 } |
| 31 } | 31 } |
| 32 | 32 |
| 33 ThrottlingResourceHandler::~ThrottlingResourceHandler() { | 33 ThrottlingResourceHandler::~ThrottlingResourceHandler() { |
| 34 } | 34 } |
| 35 | 35 |
| 36 bool ThrottlingResourceHandler::OnRequestRedirected( | 36 bool ThrottlingResourceHandler::OnRequestRedirected( |
| 37 const net::RedirectInfo& redirect_info, | 37 const net::RedirectInfo& redirect_info, |
| 38 ResourceResponse* response, | 38 ResourceResponse* response, |
| 39 bool* defer) { | 39 bool* defer) { |
| 40 DCHECK(!cancelled_by_resource_throttle_); | 40 DCHECK(!cancelled_by_resource_throttle_); |
| 41 DCHECK(!*defer); |
| 41 | 42 |
| 42 *defer = false; | |
| 43 while (next_index_ < throttles_.size()) { | 43 while (next_index_ < throttles_.size()) { |
| 44 int index = next_index_; | 44 int index = next_index_; |
| 45 throttles_[index]->WillRedirectRequest(redirect_info, defer); | 45 throttles_[index]->WillRedirectRequest(redirect_info, defer); |
| 46 next_index_++; | 46 next_index_++; |
| 47 if (cancelled_by_resource_throttle_) | 47 if (cancelled_by_resource_throttle_) |
| 48 return false; | 48 return false; |
| 49 if (*defer) { | 49 if (*defer) { |
| 50 OnRequestDefered(index); | 50 OnRequestDeferred(index); |
| 51 deferred_stage_ = DEFERRED_REDIRECT; | 51 deferred_stage_ = DEFERRED_REDIRECT; |
| 52 deferred_redirect_ = redirect_info; | 52 deferred_redirect_ = redirect_info; |
| 53 deferred_response_ = response; | 53 deferred_response_ = response; |
| 54 return true; // Do not cancel. | 54 return true; // Do not cancel. |
| 55 } | 55 } |
| 56 } | 56 } |
| 57 | 57 |
| 58 next_index_ = 0; // Reset for next time. | 58 next_index_ = 0; // Reset for next time. |
| 59 | 59 |
| 60 return next_handler_->OnRequestRedirected(redirect_info, response, defer); | 60 return next_handler_->OnRequestRedirected(redirect_info, response, defer); |
| 61 } | 61 } |
| 62 | 62 |
| 63 bool ThrottlingResourceHandler::OnWillStart(const GURL& url, bool* defer) { | 63 bool ThrottlingResourceHandler::OnWillStart(const GURL& url, bool* defer) { |
| 64 DCHECK(!cancelled_by_resource_throttle_); | 64 DCHECK(!cancelled_by_resource_throttle_); |
| 65 DCHECK(!*defer); |
| 65 | 66 |
| 66 *defer = false; | |
| 67 while (next_index_ < throttles_.size()) { | 67 while (next_index_ < throttles_.size()) { |
| 68 int index = next_index_; | 68 int index = next_index_; |
| 69 throttles_[index]->WillStartRequest(defer); | 69 throttles_[index]->WillStartRequest(defer); |
| 70 next_index_++; | 70 next_index_++; |
| 71 if (cancelled_by_resource_throttle_) | 71 if (cancelled_by_resource_throttle_) |
| 72 return false; | 72 return false; |
| 73 if (*defer) { | 73 if (*defer) { |
| 74 OnRequestDefered(index); | 74 OnRequestDeferred(index); |
| 75 deferred_stage_ = DEFERRED_START; | 75 deferred_stage_ = DEFERRED_START; |
| 76 deferred_url_ = url; | 76 deferred_url_ = url; |
| 77 return true; // Do not cancel. | 77 return true; // Do not cancel. |
| 78 } | 78 } |
| 79 } | 79 } |
| 80 | 80 |
| 81 next_index_ = 0; // Reset for next time. | 81 next_index_ = 0; // Reset for next time. |
| 82 | 82 |
| 83 return next_handler_->OnWillStart(url, defer); | 83 return next_handler_->OnWillStart(url, defer); |
| 84 } | 84 } |
| 85 | 85 |
| 86 bool ThrottlingResourceHandler::OnResponseStarted(ResourceResponse* response, | 86 bool ThrottlingResourceHandler::OnResponseStarted(ResourceResponse* response, |
| 87 bool* defer) { | 87 bool* defer) { |
| 88 DCHECK(!cancelled_by_resource_throttle_); | 88 DCHECK(!cancelled_by_resource_throttle_); |
| 89 DCHECK(!*defer); |
| 89 | 90 |
| 90 while (next_index_ < throttles_.size()) { | 91 while (next_index_ < throttles_.size()) { |
| 91 int index = next_index_; | 92 int index = next_index_; |
| 92 throttles_[index]->WillProcessResponse(defer); | 93 throttles_[index]->WillProcessResponse(defer); |
| 93 next_index_++; | 94 next_index_++; |
| 94 if (cancelled_by_resource_throttle_) | 95 if (cancelled_by_resource_throttle_) |
| 95 return false; | 96 return false; |
| 96 if (*defer) { | 97 if (*defer) { |
| 97 OnRequestDefered(index); | 98 OnRequestDeferred(index); |
| 98 deferred_stage_ = DEFERRED_RESPONSE; | 99 deferred_stage_ = DEFERRED_RESPONSE; |
| 99 deferred_response_ = response; | 100 deferred_response_ = response; |
| 100 return true; // Do not cancel. | 101 return true; // Do not cancel. |
| 101 } | 102 } |
| 102 } | 103 } |
| 103 | 104 |
| 104 next_index_ = 0; // Reset for next time. | 105 next_index_ = 0; // Reset for next time. |
| 105 | 106 |
| 106 return next_handler_->OnResponseStarted(response, defer); | 107 return next_handler_->OnResponseStarted(response, defer); |
| 107 } | 108 } |
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| 181 deferred_response_.swap(response); | 182 deferred_response_.swap(response); |
| 182 | 183 |
| 183 bool defer = false; | 184 bool defer = false; |
| 184 if (!OnResponseStarted(response.get(), &defer)) { | 185 if (!OnResponseStarted(response.get(), &defer)) { |
| 185 controller()->Cancel(); | 186 controller()->Cancel(); |
| 186 } else if (!defer) { | 187 } else if (!defer) { |
| 187 controller()->Resume(); | 188 controller()->Resume(); |
| 188 } | 189 } |
| 189 } | 190 } |
| 190 | 191 |
| 191 void ThrottlingResourceHandler::OnRequestDefered(int throttle_index) { | 192 void ThrottlingResourceHandler::OnRequestDeferred(int throttle_index) { |
| 192 request()->LogBlockedBy(throttles_[throttle_index]->GetNameForLogging()); | 193 request()->LogBlockedBy(throttles_[throttle_index]->GetNameForLogging()); |
| 193 } | 194 } |
| 194 | 195 |
| 195 } // namespace content | 196 } // namespace content |
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