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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 "content/browser/resource_protocol.h" | |
6 | |
7 #include "base/format_macros.h" | |
8 #include "base/strings/stringprintf.h" | |
9 #include "blink/public/resources/grit/blink_resources.h" | |
10 #include "content/public/common/content_client.h" | |
11 #include "net/base/net_errors.h" | |
12 #include "net/http/http_request_headers.h" | |
13 #include "net/http/http_response_headers.h" | |
14 #include "net/http/http_response_info.h" | |
15 #include "net/url_request/url_request.h" | |
16 #include "net/url_request/url_request_error_job.h" | |
17 #include "net/url_request/url_request_job.h" | |
18 #include "net/url_request/url_request_job_factory.h" | |
19 #include "net/url_request/url_request_simple_job.h" | |
20 #include "ui/base/layout.h" | |
21 | |
22 namespace content { | |
23 namespace { | |
24 | |
25 struct BuiltinWebAccessibleResource { | |
26 const char* path; | |
27 int resource_id; | |
28 ui::ScaleFactor scale_factor; | |
29 const char* content_type; | |
30 }; | |
31 | |
32 static const char kBlinkHostname[] = "blink"; | |
33 static const BuiltinWebAccessibleResource kBlinkWebAccessibleResources[] = { | |
34 // Warning: Resources in this list are exposed to all web content. | |
35 // Carefully consider whether the resource could be used for XSS before | |
36 // including it. | |
37 // TODO(jbroman): Put actual resources in here. | |
38 }; | |
39 | |
40 class URLRequestResourceJob : public net::URLRequestSimpleJob { | |
41 public: | |
42 using WebAccessibleResource = ResourceProtocolHandler::WebAccessibleResource; | |
43 | |
44 URLRequestResourceJob(net::URLRequest* request, | |
45 net::NetworkDelegate* network_delegate, | |
46 const WebAccessibleResource& resource_info, | |
47 ContentClient* content_client) | |
48 : net::URLRequestSimpleJob(request, network_delegate), | |
49 resource_info_(resource_info), | |
50 content_client_(content_client) { | |
51 std::string raw_headers("HTTP/1.1 200 OK"); | |
52 raw_headers.append(2, '\0'); | |
53 response_headers_ = new net::HttpResponseHeaders(raw_headers); | |
54 } | |
55 | |
56 // Overridden from net::URLRequestSimpleJob: | |
57 int GetData(std::string* mime_type, | |
58 std::string* charset, | |
59 std::string* data, | |
60 const net::CompletionCallback& callback) const override { | |
61 *data = GetContentClient() | |
62 ->GetDataResource(resource_info_.resource_id, | |
jbroman
2014/11/14 18:46:35
It seems to be okay to call both content::GetConte
| |
63 resource_info_.scale_factor) | |
64 .as_string(); | |
65 | |
66 response_headers_->AddHeader(base::StringPrintf( | |
67 "%s: %" PRIuS, net::HttpRequestHeaders::kContentLength, data->size())); | |
68 | |
69 response_headers_->AddHeader( | |
70 base::StringPrintf("%s: %s", net::HttpRequestHeaders::kContentType, | |
71 resource_info_.content_type.c_str())); | |
72 response_headers_->GetMimeTypeAndCharset(mime_type, charset); | |
73 | |
74 return net::OK; | |
75 } | |
76 | |
77 void GetResponseInfo(net::HttpResponseInfo* info) override { | |
78 info->headers = response_headers_; | |
79 } | |
80 | |
81 private: | |
82 ~URLRequestResourceJob() override {} | |
83 | |
84 ContentClient* GetContentClient() const { | |
85 return content_client_ ? content_client_ : content::GetContentClient(); | |
86 } | |
87 | |
88 WebAccessibleResource resource_info_; | |
89 scoped_refptr<net::HttpResponseHeaders> response_headers_; | |
90 ContentClient* content_client_; | |
91 }; | |
92 | |
93 } // namespace | |
94 | |
95 ResourceProtocolHandler::ResourceProtocolHandler() | |
96 : ResourceProtocolHandler(nullptr) { | |
97 } | |
98 | |
99 ResourceProtocolHandler::ResourceProtocolHandler(ContentClient* content_client) | |
100 : content_client_(content_client) { | |
101 std::string hostname = kBlinkHostname; | |
102 for (const auto& resource : kBlinkWebAccessibleResources) { | |
103 RegisterResource(hostname, resource.path, resource.resource_id, | |
104 resource.scale_factor, resource.content_type); | |
105 } | |
106 } | |
107 | |
108 ResourceProtocolHandler::~ResourceProtocolHandler() { | |
109 } | |
110 | |
111 void ResourceProtocolHandler::RegisterResource( | |
112 const std::string& host, | |
113 const std::string& path, | |
114 int resource_id, | |
115 ui::ScaleFactor scale_factor, | |
116 const std::string& content_type) { | |
117 WebAccessibleResource& resource_info = resources_[std::make_pair(host, path)]; | |
118 resource_info.resource_id = resource_id; | |
119 resource_info.scale_factor = scale_factor; | |
120 resource_info.content_type = content_type; | |
121 } | |
122 | |
123 net::URLRequestJob* ResourceProtocolHandler::MaybeCreateJob( | |
124 net::URLRequest* request, | |
125 net::NetworkDelegate* network_delegate) const { | |
126 DCHECK(request); | |
127 DCHECK(request->url().is_valid()); | |
128 | |
129 const auto& url = request->url(); | |
130 auto it = resources_.find(std::make_pair(url.host(), url.path())); | |
131 if (it != resources_.end()) { | |
132 return new URLRequestResourceJob(request, network_delegate, it->second, | |
133 content_client_); | |
134 } | |
135 | |
136 return new net::URLRequestErrorJob(request, network_delegate, | |
137 net::ERR_FILE_NOT_FOUND); | |
138 } | |
139 | |
140 bool ResourceProtocolHandler::IsSafeRedirectTarget(const GURL& location) const { | |
141 return false; | |
142 } | |
143 | |
144 } // namespace content | |
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