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// 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/chromeos/gview_request_interceptor.h"
#include "base/file_path.h"
#include "base/path_service.h"
#include "base/singleton.h"
#include "chrome/common/chrome_paths.h"
#include "googleurl/src/gurl.h"
#include "net/base/escape.h"
#include "net/base/load_flags.h"
#include "net/url_request/url_request.h"
#include "net/url_request/url_request_job.h"
#include "net/url_request/url_request_redirect_job.h"
#include "webkit/glue/plugins/plugin_list.h"
namespace chromeos {
// The PDF mime type is treated special if the browser has a built-in
// PDF viewer plug-in installed - we want to intercept only if we're
// told to.
static const char* const kPdfMimeType = "application/pdf";
// This is the list of mime types currently supported by the Google
// Document Viewer.
static const char* const supported_mime_type_list[] = {
kPdfMimeType,
"application/vnd.ms-powerpoint"
};
static const char* const kGViewUrlPrefix = "http://docs.google.com/gview?url=";
GViewRequestInterceptor::GViewRequestInterceptor() {
net::URLRequest::RegisterRequestInterceptor(this);
for (size_t i = 0; i < arraysize(supported_mime_type_list); ++i) {
supported_mime_types_.insert(supported_mime_type_list[i]);
}
}
GViewRequestInterceptor::~GViewRequestInterceptor() {
net::URLRequest::UnregisterRequestInterceptor(this);
}
net::URLRequestJob* GViewRequestInterceptor::MaybeIntercept(
net::URLRequest* request) {
// Don't attempt to intercept here as we want to wait until the mime
// type is fully determined.
return NULL;
}
net::URLRequestJob* GViewRequestInterceptor::MaybeInterceptResponse(
net::URLRequest* request) {
// Do not intercept this request if it is a download.
if (request->load_flags() & net::LOAD_IS_DOWNLOAD) {
return NULL;
}
std::string mime_type;
request->GetMimeType(&mime_type);
// If the local PDF viewing plug-in is installed and enabled, don't
// redirect PDF files to Google Document Viewer.
if (mime_type == kPdfMimeType) {
FilePath pdf_path;
webkit::npapi::WebPluginInfo info;
PathService::Get(chrome::FILE_PDF_PLUGIN, &pdf_path);
if (webkit::npapi::PluginList::Singleton()->GetPluginInfoByPath(
pdf_path, &info) &&
webkit::npapi::IsPluginEnabled(info))
return NULL;
}
// If supported, build the URL to the Google Document Viewer
// including the origial document's URL, then create a new job that
// will redirect the browser to this new URL.
if (supported_mime_types_.count(mime_type) > 0) {
std::string url(kGViewUrlPrefix);
url += EscapePath(request->url().spec());
return new net::URLRequestRedirectJob(request, GURL(url));
}
return NULL;
}
GViewRequestInterceptor* GViewRequestInterceptor::GetInstance() {
return Singleton<GViewRequestInterceptor>::get();
}
} // namespace chromeos
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