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 "chrome/browser/extensions/api/declarative/declarative_api.h" 6 7 #include "base/bind.h" 8 #include "base/bind_helpers.h" 9 #include "base/task_runner_util.h" 10 #include "base/values.h" 11 #include "chrome/browser/extensions/api/declarative/rules_registry_service.h" 12 #include "chrome/browser/guest_view/web_view/web_view_guest.h" 13 #include "chrome/browser/profiles/profile.h" 14 #include "chrome/common/extensions/api/events.h" 15 #include "content/public/browser/browser_thread.h" 16 #include "content/public/browser/render_process_host.h" 17 #include "content/public/browser/render_view_host.h" 18 #include "extensions/browser/extension_system.h" 19 #include "extensions/common/extension_api.h" 20 #include "extensions/common/permissions/permissions_data.h" 21 22 using extensions::api::events::Rule; 23 24 namespace AddRules = extensions::api::events::Event::AddRules; 25 namespace GetRules = extensions::api::events::Event::GetRules; 26 namespace RemoveRules = extensions::api::events::Event::RemoveRules; 27 28 29 namespace extensions { 30 31 namespace { 32 33 const char kWebRequest[] = "declarativeWebRequest."; 34 const char kWebView[] = "webview."; 35 const char kWebViewExpectedError[] = "Webview event with Webview ID expected."; 36 37 bool IsWebViewEvent(const std::string& event_name) { 38 // Sample event names: 39 // webview.onRequest. 40 // webview.OnMessage. 41 return event_name.compare(0, strlen(kWebView), kWebView) == 0; 42 } 43 44 std::string GetWebRequestEventName(const std::string& event_name) { 45 std::string web_request_event_name(event_name); 46 if (IsWebViewEvent(web_request_event_name)) 47 web_request_event_name.replace(0, strlen(kWebView), kWebRequest); 48 return web_request_event_name; 49 } 50 51 } // namespace 52 53 RulesFunction::RulesFunction() 54 : rules_registry_(NULL) { 55 } 56 57 RulesFunction::~RulesFunction() {} 58 59 bool RulesFunction::HasPermission() { 60 std::string event_name; 61 EXTENSION_FUNCTION_VALIDATE(args_->GetString(0, &event_name)); 62 if (IsWebViewEvent(event_name) && 63 extension_->permissions_data()->HasAPIPermission( 64 extensions::APIPermission::kWebView)) 65 return true; 66 Feature::Availability availability = 67 ExtensionAPI::GetSharedInstance()->IsAvailable( 68 event_name, extension_, Feature::BLESSED_EXTENSION_CONTEXT, 69 source_url()); 70 return availability.is_available(); 71 } 72 73 bool RulesFunction::RunAsync() { 74 std::string event_name; 75 EXTENSION_FUNCTION_VALIDATE(args_->GetString(0, &event_name)); 76 77 int webview_instance_id = 0; 78 EXTENSION_FUNCTION_VALIDATE(args_->GetInteger(1, &webview_instance_id)); 79 int embedder_process_id = render_view_host()->GetProcess()->GetID(); 80 81 bool has_webview = webview_instance_id != 0; 82 if (has_webview != IsWebViewEvent(event_name)) 83 EXTENSION_FUNCTION_ERROR(kWebViewExpectedError); 84 event_name = GetWebRequestEventName(event_name); 85 86 // If we are not operating on a particular <webview>, then the key is (0, 0). 87 RulesRegistryService::WebViewKey key( 88 webview_instance_id ? embedder_process_id : 0, webview_instance_id); 89 90 RulesRegistryService* rules_registry_service = 91 RulesRegistryService::Get(GetProfile()); 92 rules_registry_ = rules_registry_service->GetRulesRegistry(key, event_name); 93 // Raw access to this function is not available to extensions, therefore 94 // there should never be a request for a nonexisting rules registry. 95 EXTENSION_FUNCTION_VALIDATE(rules_registry_.get()); 96 97 if (content::BrowserThread::CurrentlyOn(rules_registry_->owner_thread())) { 98 bool success = RunAsyncOnCorrectThread(); 99 SendResponse(success); 100 } else { 101 scoped_refptr<base::MessageLoopProxy> message_loop_proxy = 102 content::BrowserThread::GetMessageLoopProxyForThread( 103 rules_registry_->owner_thread()); 104 base::PostTaskAndReplyWithResult( 105 message_loop_proxy.get(), 106 FROM_HERE, 107 base::Bind(&RulesFunction::RunAsyncOnCorrectThread, this), 108 base::Bind(&RulesFunction::SendResponse, this)); 109 } 110 111 return true; 112 } 113 114 bool EventsEventAddRulesFunction::RunAsyncOnCorrectThread() { 115 scoped_ptr<AddRules::Params> params(AddRules::Params::Create(*args_)); 116 EXTENSION_FUNCTION_VALIDATE(params.get()); 117 118 error_ = rules_registry_->AddRules(extension_id(), params->rules); 119 120 if (error_.empty()) 121 results_ = AddRules::Results::Create(params->rules); 122 123 return error_.empty(); 124 } 125 126 bool EventsEventRemoveRulesFunction::RunAsyncOnCorrectThread() { 127 scoped_ptr<RemoveRules::Params> params(RemoveRules::Params::Create(*args_)); 128 EXTENSION_FUNCTION_VALIDATE(params.get()); 129 130 if (params->rule_identifiers.get()) { 131 error_ = rules_registry_->RemoveRules(extension_id(), 132 *params->rule_identifiers); 133 } else { 134 error_ = rules_registry_->RemoveAllRules(extension_id()); 135 } 136 137 return error_.empty(); 138 } 139 140 bool EventsEventGetRulesFunction::RunAsyncOnCorrectThread() { 141 scoped_ptr<GetRules::Params> params(GetRules::Params::Create(*args_)); 142 EXTENSION_FUNCTION_VALIDATE(params.get()); 143 144 std::vector<linked_ptr<Rule> > rules; 145 if (params->rule_identifiers.get()) { 146 rules_registry_->GetRules( 147 extension_id(), *params->rule_identifiers, &rules); 148 } else { 149 rules_registry_->GetAllRules(extension_id(), &rules); 150 } 151 152 results_ = GetRules::Results::Create(rules); 153 154 return true; 155 } 156 157 } // namespace extensions 158
