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1 // Copyright 2014 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 "extensions/common/manifest_handlers/web_accessible_resources_info.h"
6 
7 #include "base/memory/scoped_ptr.h"
8 #include "base/strings/string_number_conversions.h"
9 #include "base/strings/utf_string_conversions.h"
10 #include "base/values.h"
11 #include "extensions/common/error_utils.h"
12 #include "extensions/common/manifest.h"
13 #include "extensions/common/manifest_constants.h"
14 
15 namespace extensions {
16 
17 namespace keys = manifest_keys;
18 namespace errors = manifest_errors;
19 
20 namespace {
21 
GetResourcesInfo(const Extension * extension)22 const WebAccessibleResourcesInfo* GetResourcesInfo(const Extension* extension) {
23   return static_cast<WebAccessibleResourcesInfo*>(
24       extension->GetManifestData(keys::kWebAccessibleResources));
25 }
26 
27 }  // namespace
28 
WebAccessibleResourcesInfo()29 WebAccessibleResourcesInfo::WebAccessibleResourcesInfo() {
30 }
31 
~WebAccessibleResourcesInfo()32 WebAccessibleResourcesInfo::~WebAccessibleResourcesInfo() {
33 }
34 
35 // static
IsResourceWebAccessible(const Extension * extension,const std::string & relative_path)36 bool WebAccessibleResourcesInfo::IsResourceWebAccessible(
37     const Extension* extension,
38     const std::string& relative_path) {
39   // For old manifest versions which do not specify web_accessible_resources
40   // we always allow resource loads.
41   if (extension->manifest_version() < 2 &&
42       !WebAccessibleResourcesInfo::HasWebAccessibleResources(extension))
43     return true;
44 
45   const WebAccessibleResourcesInfo* info = GetResourcesInfo(extension);
46   return info &&
47          extension->ResourceMatches(
48              info->web_accessible_resources_, relative_path);
49 }
50 
51 // static
HasWebAccessibleResources(const Extension * extension)52 bool WebAccessibleResourcesInfo::HasWebAccessibleResources(
53     const Extension* extension) {
54   const WebAccessibleResourcesInfo* info = GetResourcesInfo(extension);
55   return info && info->web_accessible_resources_.size() > 0;
56 }
57 
WebAccessibleResourcesHandler()58 WebAccessibleResourcesHandler::WebAccessibleResourcesHandler() {
59 }
60 
~WebAccessibleResourcesHandler()61 WebAccessibleResourcesHandler::~WebAccessibleResourcesHandler() {
62 }
63 
Parse(Extension * extension,base::string16 * error)64 bool WebAccessibleResourcesHandler::Parse(Extension* extension,
65                                           base::string16* error) {
66   scoped_ptr<WebAccessibleResourcesInfo> info(new WebAccessibleResourcesInfo);
67   const base::ListValue* list_value = NULL;
68   if (!extension->manifest()->GetList(keys::kWebAccessibleResources,
69                                       &list_value)) {
70     *error = base::ASCIIToUTF16(errors::kInvalidWebAccessibleResourcesList);
71     return false;
72   }
73   for (size_t i = 0; i < list_value->GetSize(); ++i) {
74     std::string relative_path;
75     if (!list_value->GetString(i, &relative_path)) {
76       *error = ErrorUtils::FormatErrorMessageUTF16(
77           errors::kInvalidWebAccessibleResource, base::IntToString(i));
78       return false;
79     }
80     URLPattern pattern(URLPattern::SCHEME_EXTENSION);
81     if (pattern.Parse(extension->url().spec()) != URLPattern::PARSE_SUCCESS) {
82       *error = ErrorUtils::FormatErrorMessageUTF16(
83           errors::kInvalidURLPatternError, extension->url().spec());
84       return false;
85     }
86     while (relative_path[0] == '/')
87       relative_path = relative_path.substr(1, relative_path.length() - 1);
88     pattern.SetPath(pattern.path() + relative_path);
89     info->web_accessible_resources_.AddPattern(pattern);
90   }
91   extension->SetManifestData(keys::kWebAccessibleResources, info.release());
92   return true;
93 }
94 
Keys() const95 const std::vector<std::string> WebAccessibleResourcesHandler::Keys() const {
96   return SingleKey(keys::kWebAccessibleResources);
97 }
98 
99 }  // namespace extensions
100