net/base/platform_mime_util.h

   1 // Copyright (c) 2012 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 NET_BASE_PLATFORM_MIME_UTIL_H_
   6 #define NET_BASE_PLATFORM_MIME_UTIL_H_
   7
   8 #include <string>
   9
  10 #include "base/containers/hash_tables.h"
  11 #include "base/files/file_path.h"
  12
  13 namespace net {
  14
  15 // Encapsulates the platform-specific functionality in mime_util.
  16 class PlatformMimeUtil {
  17  public:
  18   // See documentation for base::GetPreferredExtensionForMimeType [mime_util.h]
  19   bool GetPreferredExtensionForMimeType(
  20       const std::string& mime_type,
  21       base::FilePath::StringType* extension) const;
  22
  23   // Adds all the extensions that the platform associates with the type
  24   // |mime_type| to the set |extensions|.  Returns at least the value returned
  25   // by GetPreferredExtensionForMimeType.
  26   void GetPlatformExtensionsForMimeType(
  27       const std::string& mime_type,
  28       base::hash_set<base::FilePath::StringType>* extensions) const;
  29
  30  protected:
  31   // Get the mime type (if any) that is associated with the file extension.
  32   // Returns true if a corresponding mime type exists.
  33   bool GetPlatformMimeTypeFromExtension(const base::FilePath::StringType& ext,
  34                                         std::string* mime_type) const;
  35 };
  36
  37 }  // namespace net
  38
  39 #endif  // NET_BASE_PLATFORM_MIME_UTIL_H_