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