1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
|
// Copyright (c) 2010 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/extensions/extension_protocols.h"
#include <algorithm>
#include "app/resource_bundle.h"
#include "base/file_path.h"
#include "base/logging.h"
#include "base/message_loop.h"
#include "base/path_service.h"
#include "base/string_util.h"
#include "build/build_config.h"
#include "chrome/browser/net/chrome_url_request_context.h"
#include "chrome/browser/renderer_host/resource_dispatcher_host.h"
#include "chrome/browser/renderer_host/resource_dispatcher_host_request_info.h"
#include "chrome/common/chrome_paths.h"
#include "chrome/common/extensions/extension.h"
#include "chrome/common/extensions/extension_file_util.h"
#include "chrome/common/extensions/extension_resource.h"
#include "chrome/common/url_constants.h"
#include "googleurl/src/url_util.h"
#include "grit/bookmark_manager_resources_map.h"
#include "net/base/mime_util.h"
#include "net/base/net_errors.h"
#include "net/url_request/url_request_error_job.h"
#include "net/url_request/url_request_file_job.h"
#include "net/url_request/url_request_simple_job.h"
namespace {
class URLRequestResourceBundleJob : public URLRequestSimpleJob {
public:
explicit URLRequestResourceBundleJob(URLRequest* request,
const FilePath& filename, int resource_id)
: URLRequestSimpleJob(request),
filename_(filename),
resource_id_(resource_id) { }
// URLRequestSimpleJob method.
virtual bool GetData(std::string* mime_type,
std::string* charset,
std::string* data) const {
const ResourceBundle& rb = ResourceBundle::GetSharedInstance();
*data = rb.GetRawDataResource(resource_id_).as_string();
bool result = net::GetMimeTypeFromFile(filename_, mime_type);
if (StartsWithASCII(*mime_type, "text/", false)) {
// All of our HTML files should be UTF-8 and for other resource types
// (like images), charset doesn't matter.
DCHECK(IsStringUTF8(*data));
*charset = "utf-8";
}
return result;
}
private:
virtual ~URLRequestResourceBundleJob() { }
// We need the filename of the resource to determine the mime type.
FilePath filename_;
// The resource bundle id to load.
int resource_id_;
};
// Returns true if an chrome-extension:// resource should be allowed to load.
bool AllowExtensionResourceLoad(URLRequest* request,
ChromeURLRequestContext* context,
const std::string& scheme) {
const ResourceDispatcherHostRequestInfo* info =
ResourceDispatcherHost::InfoForRequest(request);
GURL origin_url(info->frame_origin());
// chrome:// URLs are always allowed to load chrome-extension:// resources.
// The app launcher in the NTP uses this feature, as does dev tools.
if (origin_url.SchemeIs(chrome::kChromeUIScheme))
return true;
// Disallow loading of packaged resources for hosted apps. We don't allow
// hybrid hosted/packaged apps.
if (context->ExtensionHasWebExtent(request->url().host()))
return false;
// chrome-extension:// pages can load resources from extensions and packaged
// apps. This is allowed for legacy reasons.
if (origin_url.SchemeIs(chrome::kExtensionScheme))
return true;
// Extension resources should only be loadable from web pages which the
// extension has host permissions to (and therefore could be running script
// in, which might need access to the extension resources).
ExtensionExtent host_permissions =
context->GetEffectiveHostPermissionsForExtension(request->url().host());
if (!origin_url.is_empty() && !host_permissions.ContainsURL(origin_url))
return false;
// Don't allow toplevel navigations to extension resources in incognito mode.
// This is because an extension must run in a single process, and an
// incognito tab prevents that.
if (context->is_off_the_record() &&
info->resource_type() == ResourceType::MAIN_FRAME) {
return false;
}
// Otherwise, the resource load is allowed.
return true;
}
} // namespace
// Factory registered with URLRequest to create URLRequestJobs for extension://
// URLs.
static URLRequestJob* CreateExtensionURLRequestJob(URLRequest* request,
const std::string& scheme) {
ChromeURLRequestContext* context =
static_cast<ChromeURLRequestContext*>(request->context());
// TODO(mpcomplete): better error code.
if (!AllowExtensionResourceLoad(request, context, scheme))
return new URLRequestErrorJob(request, net::ERR_ADDRESS_UNREACHABLE);
// chrome-extension://extension-id/resource/path.js
const std::string& extension_id = request->url().host();
FilePath directory_path = context->GetPathForExtension(extension_id);
if (directory_path.value().empty()) {
LOG(WARNING) << "Failed to GetPathForExtension: " << extension_id;
return NULL;
}
FilePath resources_path;
if (PathService::Get(chrome::DIR_RESOURCES, &resources_path) &&
directory_path.DirName() == resources_path) {
FilePath relative_path = directory_path.BaseName().Append(
extension_file_util::ExtensionURLToRelativeFilePath(request->url()));
#if defined(OS_WIN)
relative_path = relative_path.NormalizeWindowsPathSeparators();
#endif
// TODO(tc): Make a map of FilePath -> resource ids so we don't have to
// covert to FilePaths all the time. This will be more useful as we add
// more resources.
for (size_t i = 0; i < kBookmarkManagerResourcesSize; ++i) {
FilePath bm_resource_path =
FilePath().AppendASCII(kBookmarkManagerResources[i].name);
#if defined(OS_WIN)
bm_resource_path = bm_resource_path.NormalizeWindowsPathSeparators();
#endif
if (relative_path == bm_resource_path) {
return new URLRequestResourceBundleJob(request, relative_path,
kBookmarkManagerResources[i].value);
}
}
}
// TODO(tc): Move all of these files into resources.pak so we don't break
// when updating on Linux.
ExtensionResource resource(extension_id, directory_path,
extension_file_util::ExtensionURLToRelativeFilePath(request->url()));
return new URLRequestFileJob(request,
resource.GetFilePathOnAnyThreadHack());
}
// Factory registered with URLRequest to create URLRequestJobs for
// chrome-user-script:/ URLs.
static URLRequestJob* CreateUserScriptURLRequestJob(URLRequest* request,
const std::string& scheme) {
ChromeURLRequestContext* context =
static_cast<ChromeURLRequestContext*>(request->context());
// chrome-user-script:/user-script-name.user.js
FilePath directory_path = context->user_script_dir_path();
ExtensionResource resource(request->url().host(), directory_path,
extension_file_util::ExtensionURLToRelativeFilePath(request->url()));
return new URLRequestFileJob(request, resource.GetFilePath());
}
void RegisterExtensionProtocols() {
URLRequest::RegisterProtocolFactory(chrome::kExtensionScheme,
&CreateExtensionURLRequestJob);
URLRequest::RegisterProtocolFactory(chrome::kUserScriptScheme,
&CreateUserScriptURLRequestJob);
}
|
