Intercept HTTP requests for documents that GView is capable of displaying (such

as pdf) and redirect the user to the appropriate URL for viewing.

Original patch by skrulx@gmail.com
http://codereview.chromium.org/174016

Review URL: http://codereview.chromium.org/199019

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@25496 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 63 insertions, 0 deletions

diff --git a/chrome/browser/chromeos/gview_request_interceptor.cc b/chrome/browser/chromeos/gview_request_interceptor.cc
new file mode 100644
index 0000000..735424b
--- /dev/null
+++ b/chrome/browser/chromeos/gview_request_interceptor.cc
@@ -0,0 +1,63 @@
+// Copyright (c) 2009 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 "net/base/escape.h"
+#include "net/base/load_flags.h"
+#include "net/url_request/url_request_job.h"
+#include "net/url_request/url_request.h"
+#include "net/url_request/url_request_redirect_job.h"
+#include "googleurl/src/gurl.h"
+
+// This is the list of mime types currently supported by the Google
+// Document Viewer.
+static const char* const supported_mime_type_list[] = {
+  "application/pdf",
+  "application/vnd.ms-powerpoint"
+};
+
+static const char* const kGViewUrlPrefix = "http://docs.google.com/gview?url=";
+
+GViewRequestInterceptor::GViewRequestInterceptor() {
+  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() {
+  URLRequest::UnregisterRequestInterceptor(this);
+}
+
+URLRequestJob* GViewRequestInterceptor::MaybeIntercept(URLRequest* request) {
+  // Don't attempt to intercept here as we want to wait until the mime
+  // type is fully determined.
+  return NULL;
+}
+
+URLRequestJob* GViewRequestInterceptor::MaybeInterceptResponse(
+    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 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 URLRequestRedirectJob(request, GURL(url));
+  }
+  return NULL;
+}
+
+URLRequest::Interceptor* GViewRequestInterceptor::GetGViewRequestInterceptor() {
+  return Singleton<GViewRequestInterceptor>::get();
+}
+