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.
5 #ifndef CHROME_BROWSER_EXTENSIONS_API_DECLARATIVE_WEBREQUEST_WEBREQUEST_RULES_REGISTRY_H_
6 #define CHROME_BROWSER_EXTENSIONS_API_DECLARATIVE_WEBREQUEST_WEBREQUEST_RULES_REGISTRY_H_
14 #include "base/gtest_prod_util.h"
15 #include "base/memory/linked_ptr.h"
16 #include "base/memory/ref_counted.h"
17 #include "base/memory/scoped_ptr.h"
18 #include "base/time/time.h"
19 #include "chrome/browser/extensions/api/declarative/declarative_rule.h"
20 #include "chrome/browser/extensions/api/declarative/rules_registry.h"
21 #include "chrome/browser/extensions/api/declarative_webrequest/request_stage.h"
22 #include "chrome/browser/extensions/api/declarative_webrequest/webrequest_action.h"
23 #include "chrome/browser/extensions/api/declarative_webrequest/webrequest_condition.h"
24 #include "chrome/browser/extensions/extension_info_map.h"
25 #include "extensions/common/matcher/url_matcher.h"
28 class WebRequestPermissions;
30 namespace extension_web_request_api_helpers {
31 struct EventResponseDelta;
38 namespace extensions {
40 class RulesRegistryService;
42 typedef linked_ptr<extension_web_request_api_helpers::EventResponseDelta>
43 LinkedPtrEventResponseDelta;
44 typedef DeclarativeRule<WebRequestCondition, WebRequestAction> WebRequestRule;
46 // The WebRequestRulesRegistry is responsible for managing
47 // the internal representation of rules for the Declarative Web Request API.
49 // Here is the high level overview of this functionality:
51 // RulesRegistry::Rule consists of Conditions and Actions, these are
52 // represented as a WebRequestRule with WebRequestConditions and
53 // WebRequestRuleActions.
55 // WebRequestConditions represent JSON dictionaries as the following:
57 // 'instanceType': 'URLMatcher',
58 // 'host_suffix': 'example.com',
59 // 'path_prefix': '/query',
63 // The evaluation of URL related condition attributes (host_suffix, path_prefix)
64 // is delegated to a URLMatcher, because this is capable of evaluating many
65 // of such URL related condition attributes in parallel.
67 // For this, the URLRequestCondition has a URLMatcherConditionSet, which
68 // represents the {'host_suffix': 'example.com', 'path_prefix': '/query'} part.
69 // We will then ask the URLMatcher, whether a given URL
70 // "http://www.example.com/query/" has any matches, and the URLMatcher
71 // will respond with the URLMatcherConditionSet::ID. We can map this
72 // to the WebRequestRule and check whether also the other conditions (in this
73 // example 'scheme': 'http') are fulfilled.
74 class WebRequestRulesRegistry : public RulesRegistry {
76 // |cache_delegate| can be NULL. In that case it constructs the registry with
77 // storage functionality suspended.
78 WebRequestRulesRegistry(Profile* profile,
79 RulesCacheDelegate* cache_delegate);
81 // TODO(battre): This will become an implementation detail, because we need
82 // a way to also execute the actions of the rules.
83 std::set<const WebRequestRule*> GetMatches(
84 const WebRequestData& request_data_without_ids) const;
86 // Returns which modifications should be executed on the network request
87 // according to the rules registered in this registry.
88 std::list<LinkedPtrEventResponseDelta> CreateDeltas(
89 const ExtensionInfoMap* extension_info_map,
90 const WebRequestData& request_data,
91 bool crosses_incognito);
93 // Implementation of RulesRegistry:
94 virtual std::string AddRulesImpl(
95 const std::string& extension_id,
96 const std::vector<linked_ptr<RulesRegistry::Rule> >& rules) OVERRIDE;
97 virtual std::string RemoveRulesImpl(
98 const std::string& extension_id,
99 const std::vector<std::string>& rule_identifiers) OVERRIDE;
100 virtual std::string RemoveAllRulesImpl(
101 const std::string& extension_id) OVERRIDE;
103 // Returns true if this object retains no allocated data. Only for debugging.
104 bool IsEmpty() const;
107 virtual ~WebRequestRulesRegistry();
109 // Virtual for testing:
110 virtual base::Time GetExtensionInstallationTime(
111 const std::string& extension_id) const;
112 virtual void ClearCacheOnNavigation();
114 void SetExtensionInfoMapForTesting(
115 scoped_refptr<ExtensionInfoMap> extension_info_map) {
116 extension_info_map_ = extension_info_map;
119 const std::set<const WebRequestRule*>&
120 rules_with_untriggered_conditions_for_test() const {
121 return rules_with_untriggered_conditions_;
125 FRIEND_TEST_ALL_PREFIXES(WebRequestRulesRegistrySimpleTest, StageChecker);
126 FRIEND_TEST_ALL_PREFIXES(WebRequestRulesRegistrySimpleTest,
127 HostPermissionsChecker);
129 typedef std::map<URLMatcherConditionSet::ID, WebRequestRule*> RuleTriggers;
130 typedef std::map<WebRequestRule::RuleId, linked_ptr<WebRequestRule> >
132 typedef std::set<URLMatcherConditionSet::ID> URLMatches;
133 typedef std::set<const WebRequestRule*> RuleSet;
135 // This bundles all consistency checkers. Returns true in case of consistency
136 // and MUST set |error| otherwise.
137 static bool Checker(const Extension* extension,
138 const WebRequestConditionSet* conditions,
139 const WebRequestActionSet* actions,
142 // Check that the |extension| has host permissions for all URLs if actions
143 // requiring them are present.
144 static bool HostPermissionsChecker(const Extension* extension,
145 const WebRequestActionSet* actions,
148 // Check that every action is applicable in the same request stage as at
149 // least one condition.
150 static bool StageChecker(const WebRequestConditionSet* conditions,
151 const WebRequestActionSet* actions,
154 // Helper for RemoveRulesImpl and RemoveAllRulesImpl. Call this before
155 // deleting |rule| from one of the maps in |webrequest_rules_|. It will erase
156 // the rule from |rule_triggers_| and |rules_with_untriggered_conditions_|,
157 // and add every of the rule's URLMatcherConditionSet to
158 // |remove_from_url_matcher|, so that the caller can remove them from the
160 void CleanUpAfterRule(
161 const WebRequestRule* rule,
162 std::vector<URLMatcherConditionSet::ID>* remove_from_url_matcher);
164 // This is a helper function to GetMatches. Rules triggered by |url_matches|
165 // get added to |result| if one of their conditions is fulfilled.
166 // |request_data| gets passed to IsFulfilled of the rules' condition sets.
167 void AddTriggeredRules(const URLMatches& url_matches,
168 const WebRequestCondition::MatchData& request_data,
169 RuleSet* result) const;
171 // Map that tells us which WebRequestRule may match under the condition that
172 // the URLMatcherConditionSet::ID was returned by the |url_matcher_|.
173 RuleTriggers rule_triggers_;
175 // These rules contain condition sets with conditions without URL attributes.
176 // Such conditions are not triggered by URL matcher, so we need to test them
178 std::set<const WebRequestRule*> rules_with_untriggered_conditions_;
180 std::map<WebRequestRule::ExtensionId, RulesMap> webrequest_rules_;
182 URLMatcher url_matcher_;
185 scoped_refptr<ExtensionInfoMap> extension_info_map_;
187 DISALLOW_COPY_AND_ASSIGN(WebRequestRulesRegistry);
190 } // namespace extensions
192 #endif // CHROME_BROWSER_EXTENSIONS_API_DECLARATIVE_WEBREQUEST_WEBREQUEST_RULES_REGISTRY_H_