1 // Copyright (c) 2011 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/chromeos/gview_request_interceptor.h" 6 7 #include "base/file_path.h" 8 #include "base/memory/singleton.h" 9 #include "base/path_service.h" 10 #include "chrome/common/chrome_paths.h" 11 #include "googleurl/src/gurl.h" 12 #include "net/base/escape.h" 13 #include "net/base/load_flags.h" 14 #include "net/url_request/url_request.h" 15 #include "net/url_request/url_request_job.h" 16 #include "net/url_request/url_request_redirect_job.h" 17 #include "webkit/glue/plugins/plugin_list.h" 18 19 namespace chromeos { 20 21 // The PDF mime type is treated special if the browser has a built-in 22 // PDF viewer plug-in installed - we want to intercept only if we're 23 // told to. 24 static const char* const kPdfMimeType = "application/pdf"; 25 26 // This is the list of mime types currently supported by the Google 27 // Document Viewer. 28 static const char* const supported_mime_type_list[] = { 29 kPdfMimeType, 30 "application/vnd.ms-powerpoint" 31 }; 32 33 static const char* const kGViewUrlPrefix = "http://docs.google.com/gview?url="; 34 GViewRequestInterceptor()35GViewRequestInterceptor::GViewRequestInterceptor() { 36 net::URLRequest::RegisterRequestInterceptor(this); 37 for (size_t i = 0; i < arraysize(supported_mime_type_list); ++i) { 38 supported_mime_types_.insert(supported_mime_type_list[i]); 39 } 40 } 41 ~GViewRequestInterceptor()42GViewRequestInterceptor::~GViewRequestInterceptor() { 43 net::URLRequest::UnregisterRequestInterceptor(this); 44 } 45 MaybeIntercept(net::URLRequest * request)46net::URLRequestJob* GViewRequestInterceptor::MaybeIntercept( 47 net::URLRequest* request) { 48 // Don't attempt to intercept here as we want to wait until the mime 49 // type is fully determined. 50 return NULL; 51 } 52 MaybeInterceptResponse(net::URLRequest * request)53net::URLRequestJob* GViewRequestInterceptor::MaybeInterceptResponse( 54 net::URLRequest* request) { 55 // Do not intercept this request if it is a download. 56 if (request->load_flags() & net::LOAD_IS_DOWNLOAD) { 57 return NULL; 58 } 59 60 std::string mime_type; 61 request->GetMimeType(&mime_type); 62 // If the local PDF viewing plug-in is installed and enabled, don't 63 // redirect PDF files to Google Document Viewer. 64 if (mime_type == kPdfMimeType) { 65 FilePath pdf_path; 66 webkit::npapi::WebPluginInfo info; 67 PathService::Get(chrome::FILE_PDF_PLUGIN, &pdf_path); 68 if (webkit::npapi::PluginList::Singleton()->GetPluginInfoByPath( 69 pdf_path, &info) && 70 webkit::npapi::IsPluginEnabled(info)) 71 return NULL; 72 } 73 // If supported, build the URL to the Google Document Viewer 74 // including the origial document's URL, then create a new job that 75 // will redirect the browser to this new URL. 76 if (supported_mime_types_.count(mime_type) > 0) { 77 std::string url(kGViewUrlPrefix); 78 url += EscapePath(request->url().spec()); 79 return new net::URLRequestRedirectJob(request, GURL(url)); 80 } 81 return NULL; 82 } 83 GetInstance()84GViewRequestInterceptor* GViewRequestInterceptor::GetInstance() { 85 return Singleton<GViewRequestInterceptor>::get(); 86 } 87 88 } // namespace chromeos 89