extensions/common/file_util.h

   1 // Copyright 2013 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_COMMON_FILE_UTIL_H_
   6 #define EXTENSIONS_COMMON_FILE_UTIL_H_
   7
   8 #include <map>
   9 #include <string>
  10 #include <vector>
  11
  12 #include "base/files/file_path.h"
  13 #include "base/memory/ref_counted.h"
  14 #include "extensions/common/manifest.h"
  15 #include "extensions/common/message_bundle.h"
  16
  17 class ExtensionIconSet;
  18 class GURL;
  19
  20 namespace base {
  21 class FilePath;
  22 }
  23
  24 namespace extensions {
  25 class Extension;
  26 class ExtensionSet;
  27 struct InstallWarning;
  28
  29 // Utilities for manipulating the on-disk storage of extensions.
  30 namespace file_util {
  31
  32 extern const base::FilePath::CharType kTempDirectoryName[];
  33
  34 // Copies |unpacked_source_dir| into the right location under |extensions_dir|.
  35 // The destination directory is returned on success, or empty path is returned
  36 // on failure.
  37 base::FilePath InstallExtension(const base::FilePath& unpacked_source_dir,
  38                                 const std::string& id,
  39                                 const std::string& version,
  40                                 const base::FilePath& extensions_dir);
  41
  42 // Removes all versions of the extension with |id| from |extensions_dir|.
  43 void UninstallExtension(const base::FilePath& extensions_dir,
  44                         const std::string& id);
  45
  46 // Loads and validates an extension from the specified directory. Returns NULL
  47 // on failure, with a description of the error in |error|.
  48 scoped_refptr<Extension> LoadExtension(const base::FilePath& extension_root,
  49                                        Manifest::Location location,
  50                                        int flags,
  51                                        std::string* error);
  52
  53 // The same as LoadExtension except use the provided |extension_id|.
  54 scoped_refptr<Extension> LoadExtension(const base::FilePath& extension_root,
  55                                        const std::string& extension_id,
  56                                        Manifest::Location location,
  57                                        int flags,
  58                                        std::string* error);
  59
  60 // Loads an extension manifest from the specified directory. Returns NULL
  61 // on failure, with a description of the error in |error|.
  62 base::DictionaryValue* LoadManifest(const base::FilePath& extension_root,
  63                                     std::string* error);
  64
  65 // Convenience overload for specifying a manifest filename.
  66 base::DictionaryValue* LoadManifest(
  67     const base::FilePath& extension_root,
  68     const base::FilePath::CharType* manifest_filename,
  69     std::string* error);
  70
  71 // Returns true if the given extension object is valid and consistent.
  72 // May also append a series of warning messages to |warnings|, but they
  73 // should not prevent the extension from running.
  74 //
  75 // Otherwise, returns false, and a description of the error is
  76 // returned in |error|.
  77 bool ValidateExtension(const Extension* extension,
  78                        std::string* error,
  79                        std::vector<InstallWarning>* warnings);
  80
  81 // Returns a list of files that contain private keys inside |extension_dir|.
  82 std::vector<base::FilePath> FindPrivateKeyFiles(
  83     const base::FilePath& extension_dir);
  84
  85 // We need to reserve the namespace of entries that start with "_" for future
  86 // use by Chrome.
  87 // If any files or directories are found using "_" prefix and are not on
  88 // reserved list we return false, and set error message.
  89 bool CheckForIllegalFilenames(const base::FilePath& extension_path,
  90                               std::string* error);
  91
  92 // Returns a path to a temporary directory for unpacking an extension that will
  93 // be installed into |extensions_dir|. Creates the directory if necessary.
  94 // The directory will be on the same file system as |extensions_dir| so
  95 // that the extension directory can be efficiently renamed into place. Returns
  96 // an empty file path on failure.
  97 base::FilePath GetInstallTempDir(const base::FilePath& extensions_dir);
  98
  99 // Helper function to delete files. This is used to avoid ugly casts which
 100 // would be necessary with PostMessage since base::Delete is overloaded.
 101 // TODO(skerner): Make a version of Delete that is not overloaded in file_util.
 102 void DeleteFile(const base::FilePath& path, bool recursive);
 103
 104 // Get a relative file path from a chrome-extension:// URL.
 105 base::FilePath ExtensionURLToRelativeFilePath(const GURL& url);
 106
 107 // Get a full file path from a chrome-extension-resource:// URL, If the URL
 108 // points a file outside of root, this function will return empty FilePath.
 109 base::FilePath ExtensionResourceURLToFilePath(const GURL& url,
 110                                               const base::FilePath& root);
 111
 112 // Returns true if the icons in the icon set exist. Oherwise, populates
 113 // |error| with the |error_message_id| for an invalid file.
 114 bool ValidateExtensionIconSet(const ExtensionIconSet& icon_set,
 115                               const Extension* extension,
 116                               int error_message_id,
 117                               std::string* error);
 118
 119 // Loads extension message catalogs and returns message bundle.
 120 // Returns NULL on error or if the extension is not localized.
 121 MessageBundle* LoadMessageBundle(const base::FilePath& extension_path,
 122                                  const std::string& default_locale,
 123                                  std::string* error);
 124
 125 // Loads the extension message bundle substitution map. Contains at least
 126 // the extension_id item.
 127 MessageBundle::SubstitutionMap* LoadMessageBundleSubstitutionMap(
 128     const base::FilePath& extension_path,
 129     const std::string& extension_id,
 130     const std::string& default_locale);
 131
 132 // Loads the extension message bundle substitution map, including messages from
 133 // Shared Modules that the given extension imports. Contains at least the
 134 // extension_id item.
 135 MessageBundle::SubstitutionMap* LoadMessageBundleSubstitutionMapWithImports(
 136     const std::string& extension_id,
 137     const ExtensionSet& extension_set);
 138
 139 // Helper functions for getting paths for files used in content verification.
 140 base::FilePath GetVerifiedContentsPath(const base::FilePath& extension_path);
 141 base::FilePath GetComputedHashesPath(const base::FilePath& extension_path);
 142
 143 }  // namespace file_util
 144 }  // namespace extensions
 145
 146 #endif  // EXTENSIONS_COMMON_FILE_UTIL_H_