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| 1 // Copyright 2017 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 "components/subresource_filter/content/browser/async_document_subresour
ce_filter.h" |
| 6 |
| 7 #include "base/bind.h" |
| 8 #include "base/bind_helpers.h" |
| 9 #include "base/callback.h" |
| 10 #include "base/location.h" |
| 11 #include "base/logging.h" |
| 12 #include "base/task_runner_util.h" |
| 13 #include "base/threading/sequenced_task_runner_handle.h" |
| 14 #include "components/subresource_filter/core/common/memory_mapped_ruleset.h" |
| 15 |
| 16 namespace subresource_filter { |
| 17 |
| 18 // AsyncDocumentSubresourceFilter::InitializationParams ------------------------ |
| 19 |
| 20 using InitializationParams = |
| 21 AsyncDocumentSubresourceFilter::InitializationParams; |
| 22 |
| 23 InitializationParams::InitializationParams() = default; |
| 24 |
| 25 InitializationParams::InitializationParams( |
| 26 GURL document_url, |
| 27 ActivationLevel parent_activation_level) |
| 28 : document_url(document_url), |
| 29 parent_activation_state(parent_activation_level) {} |
| 30 |
| 31 InitializationParams::~InitializationParams() = default; |
| 32 InitializationParams::InitializationParams(InitializationParams&&) = default; |
| 33 InitializationParams& InitializationParams::operator=(InitializationParams&&) = |
| 34 default; |
| 35 |
| 36 // AsyncDocumentSubresourceFilter ---------------------------------------------- |
| 37 |
| 38 AsyncDocumentSubresourceFilter::AsyncDocumentSubresourceFilter( |
| 39 VerifiedRuleset::Handle* ruleset_handle, |
| 40 InitializationParams params, |
| 41 base::Callback<void(ActivationState)> activation_state_callback, |
| 42 base::OnceClosure first_disallowed_load_callback) |
| 43 : task_runner_(ruleset_handle->task_runner()), |
| 44 core_(new Core(), base::OnTaskRunnerDeleter(task_runner_)), |
| 45 first_disallowed_load_callback_( |
| 46 std::move(first_disallowed_load_callback)) { |
| 47 // Note: It is safe to post |ruleset_handle|'s VerifiedRuleset pointer, |
| 48 // because a task to delete it can only be posted to (and, therefore, |
| 49 // processed by) |task_runner| after this method returns, hence after the |
| 50 // below task is posted. |
| 51 base::PostTaskAndReplyWithResult( |
| 52 task_runner_, FROM_HERE, |
| 53 base::Bind(&Core::Initialize, base::Unretained(core_.get()), |
| 54 base::Passed(¶ms), ruleset_handle->ruleset_.get()), |
| 55 std::move(activation_state_callback)); |
| 56 } |
| 57 |
| 58 AsyncDocumentSubresourceFilter::~AsyncDocumentSubresourceFilter() { |
| 59 DCHECK(thread_checker_.CalledOnValidThread()); |
| 60 } |
| 61 |
| 62 void AsyncDocumentSubresourceFilter::GetLoadPolicyForSubdocument( |
| 63 const GURL& subdocument_url, |
| 64 LoadPolicyCallback result_callback) { |
| 65 DCHECK(thread_checker_.CalledOnValidThread()); |
| 66 |
| 67 auto compute_load_policy = [](AsyncDocumentSubresourceFilter::Core* core, |
| 68 const GURL& subdocument_url) { |
| 69 DCHECK(core); |
| 70 DocumentSubresourceFilter* filter = core->filter(); |
| 71 return filter ? filter->GetLoadPolicyForSubdocument(subdocument_url) |
| 72 : LoadPolicy::Allow; |
| 73 }; |
| 74 |
| 75 // TODO(pkalinnikov): Think about avoiding copy of |subdocument_url| if it is |
| 76 // too big and won't be allowed anyway (e.g., it's a data: URI). |
| 77 base::PostTaskAndReplyWithResult( |
| 78 task_runner_, FROM_HERE, |
| 79 base::Bind(compute_load_policy, core_.get(), subdocument_url), |
| 80 std::move(result_callback)); |
| 81 } |
| 82 |
| 83 void AsyncDocumentSubresourceFilter::ReportDisallowedLoad() { |
| 84 if (!first_disallowed_load_callback_.is_null()) |
| 85 std::move(first_disallowed_load_callback_).Run(); |
| 86 |
| 87 auto report_disallowed_load = [](AsyncDocumentSubresourceFilter::Core* core) { |
| 88 DCHECK(core); |
| 89 DocumentSubresourceFilter* filter = core->filter(); |
| 90 if (filter) |
| 91 filter->reportDisallowedLoad(); |
| 92 }; |
| 93 task_runner_->PostTask(FROM_HERE, |
| 94 base::Bind(report_disallowed_load, core_.get())); |
| 95 } |
| 96 |
| 97 // AsyncDocumentSubresourceFilter::Core ---------------------------------------- |
| 98 |
| 99 AsyncDocumentSubresourceFilter::Core::Core() { |
| 100 thread_checker_.DetachFromThread(); |
| 101 } |
| 102 |
| 103 AsyncDocumentSubresourceFilter::Core::~Core() { |
| 104 DCHECK(thread_checker_.CalledOnValidThread()); |
| 105 } |
| 106 |
| 107 ActivationState AsyncDocumentSubresourceFilter::Core::Initialize( |
| 108 InitializationParams params, |
| 109 VerifiedRuleset* verified_ruleset) { |
| 110 DCHECK(thread_checker_.CalledOnValidThread()); |
| 111 DCHECK(verified_ruleset); |
| 112 |
| 113 const MemoryMappedRuleset* ruleset = verified_ruleset->Get(); |
| 114 if (!ruleset) |
| 115 return ActivationState(ActivationLevel::DISABLED); |
| 116 |
| 117 ActivationState activation_state = |
| 118 ComputeActivationState(params.document_url, params.parent_document_origin, |
| 119 params.parent_activation_state, ruleset); |
| 120 |
| 121 filter_.emplace(url::Origin(params.document_url), activation_state, ruleset, |
| 122 base::OnceClosure()); |
| 123 |
| 124 return activation_state; |
| 125 } |
| 126 |
| 127 } // namespace subresource_filter |
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