chrome/utility/extensions/unpacker.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_UTILITY_EXTENSIONS_UNPACKER_H_
   6 #define CHROME_UTILITY_EXTENSIONS_UNPACKER_H_
   7
   8 #include <string>
   9 #include <vector>
  10
  11 #include "base/files/file_path.h"
  12 #include "base/memory/scoped_ptr.h"
  13 #include "extensions/common/manifest.h"
  14
  15 class SkBitmap;
  16
  17 namespace base {
  18 class DictionaryValue;
  19 }
  20
  21 namespace extensions {
  22
  23 // This class unpacks an extension.  It is designed to be used in a sandboxed
  24 // child process.  We unpack and parse various bits of the extension, then
  25 // report back to the browser process, who then transcodes the pre-parsed bits
  26 // and writes them back out to disk for later use.
  27 class Unpacker {
  28  public:
  29   Unpacker(const base::FilePath& extension_path,
  30            const std::string& extension_id,
  31            Manifest::Location location,
  32            int creation_flags);
  33   ~Unpacker();
  34
  35   // Install the extension file at |extension_path|.  Returns true on success.
  36   // Otherwise, error_message will contain a string explaining what went wrong.
  37   bool Run();
  38
  39   // Write the decoded images to kDecodedImagesFilename.  We do this instead
  40   // of sending them over IPC, since they are so large.  Returns true on
  41   // success.
  42   bool DumpImagesToFile();
  43
  44   // Write the decoded messages to kDecodedMessageCatalogsFilename.  We do this
  45   // instead of sending them over IPC, since they are so large.  Returns true on
  46   // success.
  47   bool DumpMessageCatalogsToFile();
  48
  49   const base::string16& error_message() { return error_message_; }
  50   base::DictionaryValue* parsed_manifest() {
  51     return parsed_manifest_.get();
  52   }
  53   base::DictionaryValue* parsed_catalogs() { return parsed_catalogs_.get(); }
  54
  55  private:
  56   // Parse the manifest.json file inside the extension (not in the header).
  57   // Caller takes ownership of return value.
  58   base::DictionaryValue* ReadManifest();
  59
  60   // Parse all _locales/*/messages.json files inside the extension.
  61   bool ReadAllMessageCatalogs(const std::string& default_locale);
  62
  63   // Decodes the image at the given path and puts it in our list of decoded
  64   // images.
  65   bool AddDecodedImage(const base::FilePath& path);
  66
  67   // Parses the catalog at the given path and puts it in our list of parsed
  68   // catalogs.
  69   bool ReadMessageCatalog(const base::FilePath& message_path);
  70
  71   // Set the error message.
  72   void SetError(const std::string& error);
  73   void SetUTF16Error(const base::string16& error);
  74
  75   // The extension to unpack.
  76   base::FilePath extension_path_;
  77
  78   // The extension ID if known.
  79   std::string extension_id_;
  80
  81   // The location to use for the created extension.
  82   Manifest::Location location_;
  83
  84   // The creation flags to use with the created extension.
  85   int creation_flags_;
  86
  87   // The place we unpacked the extension to.
  88   base::FilePath temp_install_dir_;
  89
  90   // The parsed version of the manifest JSON contained in the extension.
  91   scoped_ptr<base::DictionaryValue> parsed_manifest_;
  92
  93   // A list of decoded images and the paths where those images came from.  Paths
  94   // are relative to the manifest file.
  95   struct InternalData;
  96   scoped_ptr<InternalData> internal_data_;
  97
  98   // Dictionary of relative paths and catalogs per path. Paths are in the form
  99   // of _locales/locale, without messages.json base part.
 100   scoped_ptr<base::DictionaryValue> parsed_catalogs_;
 101
 102   // The last error message that was set.  Empty if there were no errors.
 103   base::string16 error_message_;
 104
 105   DISALLOW_COPY_AND_ASSIGN(Unpacker);
 106 };
 107
 108 }  // namespace extensions
 109
 110 #endif  // CHROME_UTILITY_EXTENSIONS_UNPACKER_H_