1 // Copyright (c) 2011 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_COMMON_EXTENSIONS_EXTENSION_UNPACKER_H_ 6 #define CHROME_COMMON_EXTENSIONS_EXTENSION_UNPACKER_H_ 7 #pragma once 8 9 #include <string> 10 #include <vector> 11 12 #include "base/file_path.h" 13 #include "base/memory/scoped_ptr.h" 14 #include "base/tuple.h" 15 16 class DictionaryValue; 17 class SkBitmap; 18 19 // This class unpacks an extension. It is designed to be used in a sandboxed 20 // child process. We unpack and parse various bits of the extension, then 21 // report back to the browser process, who then transcodes the pre-parsed bits 22 // and writes them back out to disk for later use. 23 class ExtensionUnpacker { 24 public: 25 typedef std::vector< Tuple2<SkBitmap, FilePath> > DecodedImages; 26 27 explicit ExtensionUnpacker(const FilePath& extension_path); 28 ~ExtensionUnpacker(); 29 30 // Install the extension file at |extension_path|. Returns true on success. 31 // Otherwise, error_message will contain a string explaining what went wrong. 32 bool Run(); 33 34 // Write the decoded images to kDecodedImagesFilename. We do this instead 35 // of sending them over IPC, since they are so large. Returns true on 36 // success. 37 bool DumpImagesToFile(); 38 39 // Write the decoded messages to kDecodedMessageCatalogsFilename. We do this 40 // instead of sending them over IPC, since they are so large. Returns true on 41 // success. 42 bool DumpMessageCatalogsToFile(); 43 44 // Read the decoded images back from the file we saved them to. 45 // |extension_path| is the path to the extension we unpacked that wrote the 46 // data. Returns true on success. 47 static bool ReadImagesFromFile(const FilePath& extension_path, 48 DecodedImages* images); 49 50 // Read the decoded message catalogs back from the file we saved them to. 51 // |extension_path| is the path to the extension we unpacked that wrote the 52 // data. Returns true on success. 53 static bool ReadMessageCatalogsFromFile(const FilePath& extension_path, 54 DictionaryValue* catalogs); 55 56 const std::string& error_message() { return error_message_; } 57 DictionaryValue* parsed_manifest() { 58 return parsed_manifest_.get(); 59 } 60 const DecodedImages& decoded_images() { return decoded_images_; } 61 DictionaryValue* parsed_catalogs() { return parsed_catalogs_.get(); } 62 63 private: 64 // Parse the manifest.json file inside the extension (not in the header). 65 // Caller takes ownership of return value. 66 DictionaryValue* ReadManifest(); 67 68 // Parse all _locales/*/messages.json files inside the extension. 69 bool ReadAllMessageCatalogs(const std::string& default_locale); 70 71 // Decodes the image at the given path and puts it in our list of decoded 72 // images. 73 bool AddDecodedImage(const FilePath& path); 74 75 // Parses the catalog at the given path and puts it in our list of parsed 76 // catalogs. 77 bool ReadMessageCatalog(const FilePath& message_path); 78 79 // Set the error message. 80 void SetError(const std::string& error); 81 82 // The extension to unpack. 83 FilePath extension_path_; 84 85 // The place we unpacked the extension to. 86 FilePath temp_install_dir_; 87 88 // The parsed version of the manifest JSON contained in the extension. 89 scoped_ptr<DictionaryValue> parsed_manifest_; 90 91 // A list of decoded images and the paths where those images came from. Paths 92 // are relative to the manifest file. 93 DecodedImages decoded_images_; 94 95 // Dictionary of relative paths and catalogs per path. Paths are in the form 96 // of _locales/locale, without messages.json base part. 97 scoped_ptr<DictionaryValue> parsed_catalogs_; 98 99 // The last error message that was set. Empty if there were no errors. 100 std::string error_message_; 101 102 DISALLOW_COPY_AND_ASSIGN(ExtensionUnpacker); 103 }; 104 105 #endif // CHROME_COMMON_EXTENSIONS_EXTENSION_UNPACKER_H_ 106
