net/base/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_MIME_UTIL_H__
   6 #define NET_BASE_MIME_UTIL_H__
   7
   8 #include <string>
   9 #include <vector>
  10
  11 #include "base/files/file_path.h"
  12 #include "net/base/net_export.h"
  13
  14 namespace net {
  15
  16 // Get the mime type (if any) that is associated with the given file extension.
  17 // Returns true if a corresponding mime type exists.
  18 NET_EXPORT bool GetMimeTypeFromExtension(const base::FilePath::StringType& ext,
  19                                          std::string* mime_type);
  20
  21 // Get the mime type (if any) that is associated with the given file extension.
  22 // Returns true if a corresponding mime type exists. In this method,
  23 // the search for a mime type is constrained to a limited set of
  24 // types known to the net library, the OS/registry is not consulted.
  25 NET_EXPORT bool GetWellKnownMimeTypeFromExtension(
  26     const base::FilePath::StringType& ext,
  27     std::string* mime_type);
  28
  29 // Get the mime type (if any) that is associated with the given file.  Returns
  30 // true if a corresponding mime type exists.
  31 NET_EXPORT bool GetMimeTypeFromFile(const base::FilePath& file_path,
  32                                     std::string* mime_type);
  33
  34 // Get the preferred extension (if any) associated with the given mime type.
  35 // Returns true if a corresponding file extension exists.  The extension is
  36 // returned without a prefixed dot, ex "html".
  37 NET_EXPORT bool GetPreferredExtensionForMimeType(
  38     const std::string& mime_type,
  39     base::FilePath::StringType* extension);
  40
  41 // Check to see if a particular MIME type is in our list.
  42 NET_EXPORT bool IsSupportedImageMimeType(const std::string& mime_type);
  43 NET_EXPORT bool IsSupportedMediaMimeType(const std::string& mime_type);
  44 NET_EXPORT bool IsSupportedNonImageMimeType(const std::string& mime_type);
  45 NET_EXPORT bool IsUnsupportedTextMimeType(const std::string& mime_type);
  46 NET_EXPORT bool IsSupportedJavascriptMimeType(const std::string& mime_type);
  47 NET_EXPORT bool IsSupportedCertificateMimeType(const std::string& mime_type);
  48
  49 // Convenience function.
  50 NET_EXPORT bool IsSupportedMimeType(const std::string& mime_type);
  51
  52 // Returns true if this the mime_type_pattern matches a given mime-type.
  53 // Checks for absolute matching and wildcards.  mime-types should be in
  54 // lower case.
  55 NET_EXPORT bool MatchesMimeType(const std::string& mime_type_pattern,
  56                                 const std::string& mime_type);
  57
  58 // Returns true if the |type_string| is a correctly-formed mime type specifier
  59 // with no parameter, i.e. string that matches the following ABNF (see the
  60 // definition of content ABNF in RFC2045 and media-type ABNF httpbis p2
  61 // semantics).
  62 //
  63 //   token "/" token
  64 //
  65 // If |top_level_type| is non-NULL, sets it to parsed top-level type string.
  66 // If |subtype| is non-NULL, sets it to parsed subtype string.
  67 NET_EXPORT bool ParseMimeTypeWithoutParameter(const std::string& type_string,
  68                                               std::string* top_level_type,
  69                                               std::string* subtype);
  70
  71 // Returns true if the |type_string| is a top-level type of any media type
  72 // registered with IANA media types registry at
  73 // http://www.iana.org/assignments/media-types/media-types.xhtml or an
  74 // experimental type (type with x- prefix).
  75 //
  76 // This method doesn't check that the input conforms to token ABNF, so if input
  77 // is experimental type strings, you need to check check that before using
  78 // this method.
  79 NET_EXPORT bool IsValidTopLevelMimeType(const std::string& type_string);
  80
  81 // Returns true if and only if all codecs are supported, false otherwise.
  82 NET_EXPORT bool AreSupportedMediaCodecs(const std::vector<std::string>& codecs);
  83
  84 // Parses a codec string, populating |codecs_out| with the prefix of each codec
  85 // in the string |codecs_in|. For example, passed "aaa.b.c,dd.eee", if
  86 // |strip| == true |codecs_out| will contain {"aaa", "dd"}, if |strip| == false
  87 // |codecs_out| will contain {"aaa.b.c", "dd.eee"}.
  88 // See http://www.ietf.org/rfc/rfc4281.txt.
  89 NET_EXPORT void ParseCodecString(const std::string& codecs,
  90                                  std::vector<std::string>* codecs_out,
  91                                  bool strip);
  92
  93 // Check to see if a particular MIME type is in our list which only supports a
  94 // certain subset of codecs.
  95 NET_EXPORT bool IsStrictMediaMimeType(const std::string& mime_type);
  96
  97 // Indicates that the MIME type and (possible codec string) are supported by the
  98 // underlying platform.
  99 enum SupportsType {
 100   // The underlying platform is known not to support the given MIME type and
 101   // codec combination.
 102   IsNotSupported,
 103
 104   // The underlying platform is known to support the given MIME type and codec
 105   // combination.
 106   IsSupported,
 107
 108   // The underlying platform is unsure whether the given MIME type and codec
 109   // combination can be rendered or not before actually trying to play it.
 110   MayBeSupported
 111 };
 112
 113 // Checks the |mime_type| and |codecs| against the MIME types known to support
 114 // only a particular subset of codecs.
 115 // * Returns IsSupported if the |mime_type| is supported and all the codecs
 116 //   within the |codecs| are supported for the |mime_type|.
 117 // * Returns MayBeSupported if the |mime_type| is supported and is known to
 118 //   support only a subset of codecs, but |codecs| was empty. Also returned if
 119 //   all the codecs in |codecs| are supported, but additional codec parameters
 120 //   were supplied (such as profile) for which the support cannot be decided.
 121 // * Returns IsNotSupported if either the |mime_type| is not supported or the
 122 //   |mime_type| is supported but at least one of the codecs within |codecs| is
 123 //   not supported for the |mime_type|.
 124 NET_EXPORT SupportsType IsSupportedStrictMediaMimeType(
 125     const std::string& mime_type,
 126     const std::vector<std::string>& codecs);
 127
 128 // Get the extensions associated with the given mime type. This should be passed
 129 // in lower case. There could be multiple extensions for a given mime type, like
 130 // "html,htm" for "text/html", or "txt,text,html,..." for "text/*".
 131 // Note that we do not erase the existing elements in the the provided vector.
 132 // Instead, we append the result to it.
 133 NET_EXPORT void GetExtensionsForMimeType(
 134     const std::string& mime_type,
 135     std::vector<base::FilePath::StringType>* extensions);
 136
 137 // Test only method that removes proprietary media types and codecs from the
 138 // list of supported MIME types and codecs. These types and codecs must be
 139 // removed to ensure consistent layout test results across all Chromium
 140 // variations.
 141 NET_EXPORT void RemoveProprietaryMediaTypesAndCodecsForTests();
 142
 143 // A list of supported certificate-related mime types.
 144 //
 145 // A Java counterpart will be generated for this enum.
 146 // GENERATED_JAVA_ENUM_PACKAGE: org.chromium.net
 147 enum CertificateMimeType {
 148   CERTIFICATE_MIME_TYPE_UNKNOWN,
 149   CERTIFICATE_MIME_TYPE_X509_USER_CERT,
 150   CERTIFICATE_MIME_TYPE_X509_CA_CERT,
 151   CERTIFICATE_MIME_TYPE_PKCS12_ARCHIVE,
 152 };
 153
 154 NET_EXPORT CertificateMimeType GetCertificateMimeTypeForMimeType(
 155     const std::string& mime_type);
 156
 157 // Prepares one value as part of a multi-part upload request.
 158 NET_EXPORT void AddMultipartValueForUpload(const std::string& value_name,
 159                                            const std::string& value,
 160                                            const std::string& mime_boundary,
 161                                            const std::string& content_type,
 162                                            std::string* post_data);
 163
 164 // Adds the final delimiter to a multi-part upload request.
 165 NET_EXPORT void AddMultipartFinalDelimiterForUpload(
 166     const std::string& mime_boundary,
 167     std::string* post_data);
 168
 169 }  // namespace net
 170
 171 #endif  // NET_BASE_MIME_UTIL_H__