Read the archive's header when there is a url request

atom/common/asar/archive.h

@@ -0,0 +1,44 @@
+// Copyright (c) 2014 GitHub, Inc. All rights reserved.
+// Use of this source code is governed by the MIT license that can be
+// found in the LICENSE file.
+
+#ifndef ATOM_COMMON_ASAR_ARCHIVE_H_
+#define ATOM_COMMON_ASAR_ARCHIVE_H_
+
+#include "base/files/file_path.h"
+#include "base/memory/scoped_ptr.h"
+
+namespace base {
+class DictionaryValue;
+}
+
+namespace asar {
+
+class Archive {
+ public:
+  struct FileInfo {
+    uint32 size;
+    uint64 offset;
+  };
+
+  explicit Archive(const base::FilePath& path);
+  virtual ~Archive();
+
+  // Read and parse the header.
+  bool Init();
+
+  // Get the info of a file.
+  bool GetFileInfo(const base::FilePath& path, FileInfo* info);
+
+  base::FilePath path() const { return path_; }
+
+ private:
+  base::FilePath path_;
+  scoped_ptr<base::DictionaryValue> header_;
+
+  DISALLOW_COPY_AND_ASSIGN(Archive);
+};
+
+}  // namespace asar
+
+#endif  // ATOM_COMMON_ASAR_ARCHIVE_H_