chrome/browser/extensions/updater/safe_manifest_parser.h

   1 // Copyright (c) 2012 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 #ifndef CHROME_BROWSER_EXTENSIONS_UPDATER_SAFE_MANIFEST_PARSER_H_
   6 #define CHROME_BROWSER_EXTENSIONS_UPDATER_SAFE_MANIFEST_PARSER_H_
   7 #include <string>
   8
   9 #include "base/basictypes.h"
  10 #include "base/callback.h"
  11 #include "base/memory/scoped_ptr.h"
  12 #include "chrome/browser/extensions/updater/manifest_fetch_data.h"
  13 #include "chrome/common/extensions/update_manifest.h"
  14 #include "content/public/browser/utility_process_host_client.h"
  15
  16 namespace extensions {
  17
  18 // Utility class to handle doing xml parsing in a sandboxed utility process.
  19 class SafeManifestParser : public content::UtilityProcessHostClient {
  20  public:
  21   // Callback that is invoked when the manifest results are ready.
  22   typedef base::Callback<void(const ManifestFetchData&,
  23                               const UpdateManifest::Results*)> UpdateCallback;
  24
  25   // Takes ownership of |fetch_data|.
  26   SafeManifestParser(const std::string& xml,
  27                      ManifestFetchData* fetch_data,
  28                      const UpdateCallback& update_callback);
  29
  30   // Posts a task over to the IO loop to start the parsing of xml_ in a
  31   // utility process.
  32   void Start();
  33
  34  private:
  35   virtual ~SafeManifestParser();
  36
  37   // Creates the sandboxed utility process and tells it to start parsing.
  38   void ParseInSandbox();
  39
  40   // content::UtilityProcessHostClient implementation.
  41   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
  42
  43   void OnParseUpdateManifestSucceeded(const UpdateManifest::Results& results);
  44   void OnParseUpdateManifestFailed(const std::string& error_message);
  45
  46   const std::string xml_;
  47
  48   // Should be accessed only on UI thread.
  49   scoped_ptr<ManifestFetchData> fetch_data_;
  50   UpdateCallback update_callback_;
  51
  52   DISALLOW_COPY_AND_ASSIGN(SafeManifestParser);
  53 };
  54
  55 }  // namespace extensions
  56
  57 #endif  // CHROME_BROWSER_EXTENSIONS_UPDATER_SAFE_MANIFEST_PARSER_H_