Unpack extensions inside chrome's directory.

chrome/common/extensions/extension_unpacker.cc

 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/common/extensions/extension_unpacker.h"
 
 #include "base/file_util.h"
 #include "base/scoped_handle.h"
 #include "base/scoped_temp_dir.h"
 #include "base/string_util.h"
 #include "base/thread.h"
 #include "base/values.h"
 #include "net/base/file_stream.h"
 #include "chrome/common/common_param_traits.h"
 #include "chrome/common/extensions/extension.h"
 #include "chrome/common/extensions/extension_constants.h"
 #include "chrome/common/extensions/extension_file_util.h"
 #include "chrome/common/extensions/extension_l10n_util.h"
 #include "chrome/common/json_value_serializer.h"
 #include "chrome/common/notification_service.h"
 #include "chrome/common/url_constants.h"
 #include "chrome/common/zip.h"
 #include "ipc/ipc_message_utils.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "webkit/glue/image_decoder.h"
 
 namespace errors = extension_manifest_errors;
 namespace keys = extension_manifest_keys;
+namespace filenames = extension_filenames;
 
 namespace {
-// The name of a temporary directory to install an extension into for
-// validation before finalizing install.
-const char kTempExtensionName[] = "TEMP_INSTALL";
-
-// The file to write our decoded images to, relative to the extension_path.
-const char kDecodedImagesFilename[] = "DECODED_IMAGES";
-
-// The file to write our decoded message catalogs to, relative to the
-// extension_path.
-const char kDecodedMessageCatalogsFilename[] = "DECODED_MESSAGE_CATALOGS";
 
 // Errors
 const char* kCouldNotCreateDirectoryError =
     "Could not create directory for unzipping: ";
 const char* kCouldNotDecodeImageError = "Could not decode theme image.";
 const char* kCouldNotUnzipExtension = "Could not unzip extension.";
 const char* kPathNamesMustBeAbsoluteOrLocalError =
     "Path names must not be absolute or contain '..'.";
 
 // A limit to stop us passing dangerously large canvases to the browser.
@@ skipping 90 matching lines @@
   }
 
   return true;
 }
 
 bool ExtensionUnpacker::Run() {
   LOG(INFO) << "Installing extension " << extension_path_.value();
 
   // <profile>/Extensions/INSTALL_TEMP/<version>
   temp_install_dir_ =
-      extension_path_.DirName().AppendASCII(kTempExtensionName);
+    extension_path_.DirName().AppendASCII(filenames::kTempExtensionName);
   if (!file_util::CreateDirectory(temp_install_dir_)) {
 #if defined(OS_WIN)
     std::string dir_string = WideToUTF8(temp_install_dir_.value());
 #else
     std::string dir_string = temp_install_dir_.value();
 #endif
     SetError(kCouldNotCreateDirectoryError + dir_string);
     return false;
   }
 
@@ skipping 40 matching lines @@
       return false;  // Error was already reported.
   }
 
   return true;
 }
 
 bool ExtensionUnpacker::DumpImagesToFile() {
   IPC::Message pickle;  // We use a Message so we can use WriteParam.
   IPC::WriteParam(&pickle, decoded_images_);
 
-  FilePath path = extension_path_.DirName().AppendASCII(kDecodedImagesFilename);
+  FilePath path = extension_path_.DirName().AppendASCII(
+      filenames::kDecodedImagesFilename);
   if (!file_util::WriteFile(path, static_cast<const char*>(pickle.data()),
                             pickle.size())) {
     SetError("Could not write image data to disk.");
     return false;
   }
 
   return true;
 }
 
 bool ExtensionUnpacker::DumpMessageCatalogsToFile() {
   IPC::Message pickle;
   IPC::WriteParam(&pickle, *parsed_catalogs_.get());
 
   FilePath path = extension_path_.DirName().AppendASCII(
-      kDecodedMessageCatalogsFilename);
+      filenames::kDecodedMessageCatalogsFilename);
   if (!file_util::WriteFile(path, static_cast<const char*>(pickle.data()),
                             pickle.size())) {
     SetError("Could not write message catalogs to disk.");
     return false;
   }
 
   return true;
 }
 
 // static
 bool ExtensionUnpacker::ReadImagesFromFile(const FilePath& extension_path,
                                            DecodedImages* images) {
-  FilePath path = extension_path.AppendASCII(kDecodedImagesFilename);
+  FilePath path = extension_path.AppendASCII(filenames::kDecodedImagesFilename);
   std::string file_str;
   if (!file_util::ReadFileToString(path, &file_str))
     return false;
 
   IPC::Message pickle(file_str.data(), file_str.size());
   void* iter = NULL;
   return IPC::ReadParam(&pickle, &iter, images);
 }
 
 // static
 bool ExtensionUnpacker::ReadMessageCatalogsFromFile(
     const FilePath& extension_path, DictionaryValue* catalogs) {
-  FilePath path = extension_path.AppendASCII(kDecodedMessageCatalogsFilename);
+  FilePath path = extension_path.AppendASCII(
+      filenames::kDecodedMessageCatalogsFilename);
   std::string file_str;
   if (!file_util::ReadFileToString(path, &file_str))
     return false;
 
   IPC::Message pickle(file_str.data(), file_str.size());
   void* iter = NULL;
   return IPC::ReadParam(&pickle, &iter, catalogs);
 }
 
 bool ExtensionUnpacker::AddDecodedImage(const FilePath& path) {
@@ skipping 37 matching lines @@
 
   parsed_catalogs_->Set(relative_path.DirName().ToWStringHack(),
                         root.release());
 
   return true;
 }
 
 void ExtensionUnpacker::SetError(const std::string &error) {
   error_message_ = error;
 }