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 #include "net/base/platform_mime_util.h"
6
7 #include <string>
8
9 #include "base/logging.h"
10 #include "build/build_config.h"
11
12 #if defined(OS_ANDROID)
13 #include "net/android/network_library.h"
14 #else
15 #include "base/nix/mime_util_xdg.h"
16 #endif
17
18 namespace net {
19
20 #if defined(OS_ANDROID)
GetPlatformMimeTypeFromExtension(const base::FilePath::StringType & ext,std::string * result) const21 bool PlatformMimeUtil::GetPlatformMimeTypeFromExtension(
22 const base::FilePath::StringType& ext, std::string* result) const {
23 return android::GetMimeTypeFromExtension(ext, result);
24 }
25 #else
26 bool PlatformMimeUtil::GetPlatformMimeTypeFromExtension(
27 const base::FilePath::StringType& ext, std::string* result) const {
28 // TODO(thestig): This is a temporary hack until we can fix this
29 // properly in test shell / webkit.
30 // We have to play dumb and not return application/x-perl here
31 // to make the reload-subframe-object layout test happy.
32 if (ext == "pl")
33 return false;
34
35 base::FilePath dummy_path("foo." + ext);
36 std::string out = base::nix::GetFileMimeType(dummy_path);
37
38 // GetFileMimeType likes to return application/octet-stream
39 // for everything it doesn't know - ignore that.
40 if (out == "application/octet-stream" || out.empty())
41 return false;
42
43 // GetFileMimeType returns image/x-ico because that's what's in the XDG
44 // mime database. That database is the merger of the Gnome and KDE mime
45 // databases. Apparently someone working on KDE in 2001 decided .ico
46 // resolves to image/x-ico, whereas the rest of the world uses image/x-icon.
47 // FWIW, image/vnd.microsoft.icon is the official IANA assignment.
48 if (out == "image/x-ico")
49 out = "image/x-icon";
50
51 *result = out;
52 return true;
53 }
54
55 #endif // defined(OS_ANDROID)
56
57 struct MimeToExt {
58 const char* mime_type;
59 const char* ext;
60 };
61
62 const struct MimeToExt mime_type_ext_map[] = {
63 {"application/pdf", "pdf"},
64 {"application/x-tar", "tar"},
65 {"application/zip", "zip"},
66 {"audio/mpeg", "mp3"},
67 {"image/gif", "gif"},
68 {"image/jpeg", "jpg"},
69 {"image/png", "png"},
70 {"text/html", "html"},
71 {"video/mp4", "mp4"},
72 {"video/mpeg", "mpg"},
73 {"text/plain", "txt"},
74 {"text/x-sh", "sh"},
75 };
76
GetPreferredExtensionForMimeType(const std::string & mime_type,base::FilePath::StringType * ext) const77 bool PlatformMimeUtil::GetPreferredExtensionForMimeType(
78 const std::string& mime_type, base::FilePath::StringType* ext) const {
79
80 for (size_t x = 0;
81 x < (sizeof(mime_type_ext_map) / sizeof(MimeToExt));
82 x++) {
83 if (mime_type_ext_map[x].mime_type == mime_type) {
84 *ext = mime_type_ext_map[x].ext;
85 return true;
86 }
87 }
88
89 // TODO(dhg): Fix this the right way by implementing what's said below.
90 // Unlike GetPlatformMimeTypeFromExtension, this method doesn't have a
91 // default list that it uses, but for now we are also returning false since
92 // this doesn't really matter as much under Linux.
93 //
94 // If we wanted to do this properly, we would read the mime.cache file which
95 // has a section where they assign a glob (*.gif) to a mimetype
96 // (image/gif). We look up the "heaviest" glob for a certain mime type and
97 // then then try to chop off "*.".
98
99 return false;
100 }
101
GetPlatformExtensionsForMimeType(const std::string & mime_type,base::hash_set<base::FilePath::StringType> * extensions) const102 void PlatformMimeUtil::GetPlatformExtensionsForMimeType(
103 const std::string& mime_type,
104 base::hash_set<base::FilePath::StringType>* extensions) const {
105 base::FilePath::StringType ext;
106 if (GetPreferredExtensionForMimeType(mime_type, &ext))
107 extensions->insert(ext);
108 }
109
110 } // namespace net
111