Validate image files before writing them to media galleries.

chrome/browser/media_galleries/fileapi/media_file_validator_factory.cc

+// Copyright 2013 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/browser/media_galleries/fileapi/media_file_validator_factory.h"
+
+#include "base/files/file_path.h"
+#include "base/platform_file.h"
+#include "chrome/browser/media_galleries/fileapi/supported_image_type_validator.h"
+#include "webkit/browser/fileapi/copy_or_move_file_validator.h"
+#include "webkit/browser/fileapi/file_system_url.h"
+
+namespace chrome {
+
+namespace {
+
+class InvalidFileValidator : public fileapi::CopyOrMoveFileValidator {
+ public:
+  virtual ~InvalidFileValidator() {}
+  virtual void StartValidation(
+      const fileapi::CopyOrMoveFileValidator::ResultCallback&
+          result_callback) OVERRIDE {
+    result_callback.Run(base::PLATFORM_FILE_ERROR_SECURITY);
+  }
+
+ private:
+  friend class chrome::MediaFileValidatorFactory;
+
+  InvalidFileValidator() {}
+
+  DISALLOW_COPY_AND_ASSIGN(InvalidFileValidator);
+};
+
+}  // namespace
+
+MediaFileValidatorFactory::MediaFileValidatorFactory() {}
+MediaFileValidatorFactory::~MediaFileValidatorFactory() {}
+
+fileapi::CopyOrMoveFileValidator*
+MediaFileValidatorFactory::CreateCopyOrMoveFileValidator(
+    const fileapi::FileSystemURL& src,
+    const base::FilePath& platform_path) {
+  base::FilePath src_path = src.virtual_path();
+  if (SupportedImageTypeValidator::SupportsFileType(src_path))
+    return new SupportedImageTypeValidator(platform_path);
+  // TODO(vandebo): Support other file types.
+
+  return new InvalidFileValidator();
+}
+
+}  // namespace chrome