// Copyright (c) 2012 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 <algorithm>
#include <iterator>
#include <map>
#include <string>
#include "base/containers/hash_tables.h"
#include "base/lazy_instance.h"
#include "base/logging.h"
#include "base/stl_util.h"
#include "base/strings/string_split.h"
#include "base/strings/string_util.h"
#include "base/strings/utf_string_conversions.h"
#include "net/base/mime_util.h"
#include "net/base/platform_mime_util.h"
#if defined(OS_ANDROID)
#include "base/android/build_info.h"
#endif
using std::string;
namespace {
struct MediaType {
const char name[12];
const char matcher[13];
};
static const MediaType kIanaMediaTypes[] = {
{ "application", "application/" },
{ "audio", "audio/" },
{ "example", "example/" },
{ "image", "image/" },
{ "message", "message/" },
{ "model", "model/" },
{ "multipart", "multipart/" },
{ "text", "text/" },
{ "video", "video/" },
};
} // namespace
namespace net {
// Singleton utility class for mime types.
class MimeUtil : public PlatformMimeUtil {
public:
bool GetMimeTypeFromExtension(const base::FilePath::StringType& ext,
std::string* mime_type) const;
bool GetMimeTypeFromFile(const base::FilePath& file_path,
std::string* mime_type) const;
bool GetWellKnownMimeTypeFromExtension(const base::FilePath::StringType& ext,
std::string* mime_type) const;
bool IsSupportedImageMimeType(const std::string& mime_type) const;
bool IsSupportedMediaMimeType(const std::string& mime_type) const;
bool IsSupportedNonImageMimeType(const std::string& mime_type) const;
bool IsUnsupportedTextMimeType(const std::string& mime_type) const;
bool IsSupportedJavascriptMimeType(const std::string& mime_type) const;
bool IsSupportedMimeType(const std::string& mime_type) const;
bool MatchesMimeType(const std::string &mime_type_pattern,
const std::string &mime_type) const;
bool IsMimeType(const std::string& type_string) const;
bool AreSupportedMediaCodecs(const std::vector<std::string>& codecs) const;
void ParseCodecString(const std::string& codecs,
std::vector<std::string>* codecs_out,
bool strip);
bool IsStrictMediaMimeType(const std::string& mime_type) const;
bool IsSupportedStrictMediaMimeType(
const std::string& mime_type,
const std::vector<std::string>& codecs) const;
void RemoveProprietaryMediaTypesAndCodecsForTests();
private:
friend struct base::DefaultLazyInstanceTraits<MimeUtil>;
typedef base::hash_set<std::string> MimeMappings;
typedef std::map<std::string, MimeMappings> StrictMappings;
MimeUtil();
// Returns true if |codecs| is nonempty and all the items in it are present in
// |supported_codecs|.
static bool AreSupportedCodecs(const MimeMappings& supported_codecs,
const std::vector<std::string>& codecs);
// For faster lookup, keep hash sets.
void InitializeMimeTypeMaps();
bool GetMimeTypeFromExtensionHelper(const base::FilePath::StringType& ext,
bool include_platform_types,
std::string* mime_type) const;
MimeMappings image_map_;
MimeMappings media_map_;
MimeMappings non_image_map_;
MimeMappings unsupported_text_map_;
MimeMappings javascript_map_;
MimeMappings codecs_map_;
StrictMappings strict_format_map_;
}; // class MimeUtil
// This variable is Leaky because we need to access it from WorkerPool threads.
static base::LazyInstance<MimeUtil>::Leaky g_mime_util =
LAZY_INSTANCE_INITIALIZER;
struct MimeInfo {
const char* mime_type;
const char* extensions; // comma separated list
};
static const MimeInfo primary_mappings[] = {
{ "text/html", "html,htm,shtml,shtm" },
{ "text/css", "css" },
{ "text/xml", "xml" },
{ "image/gif", "gif" },
{ "image/jpeg", "jpeg,jpg" },
{ "image/webp", "webp" },
{ "image/png", "png" },
{ "video/mp4", "mp4,m4v" },
{ "audio/x-m4a", "m4a" },
{ "audio/mp3", "mp3" },
{ "video/ogg", "ogv,ogm" },
{ "audio/ogg", "ogg,oga,opus" },
{ "video/webm", "webm" },
{ "audio/webm", "webm" },
{ "audio/wav", "wav" },
{ "application/xhtml+xml", "xhtml,xht,xhtm" },
{ "application/x-chrome-extension", "crx" },
{ "multipart/related", "mhtml,mht" }
};
static const MimeInfo secondary_mappings[] = {
{ "application/octet-stream", "exe,com,bin" },
{ "application/gzip", "gz" },
{ "application/pdf", "pdf" },
{ "application/postscript", "ps,eps,ai" },
{ "application/javascript", "js" },
{ "application/font-woff", "woff" },
{ "image/bmp", "bmp" },
{ "image/x-icon", "ico" },
{ "image/vnd.microsoft.icon", "ico" },
{ "image/jpeg", "jfif,pjpeg,pjp" },
{ "image/tiff", "tiff,tif" },
{ "image/x-xbitmap", "xbm" },
{ "image/svg+xml", "svg,svgz" },
{ "message/rfc822", "eml" },
{ "text/plain", "txt,text" },
{ "text/html", "ehtml" },
{ "application/rss+xml", "rss" },
{ "application/rdf+xml", "rdf" },
{ "text/xml", "xsl,xbl,xslt" },
{ "application/vnd.mozilla.xul+xml", "xul" },
{ "application/x-shockwave-flash", "swf,swl" },
{ "application/pkcs7-mime", "p7m,p7c,p7z" },
{ "application/pkcs7-signature", "p7s" }
};
static const char* FindMimeType(const MimeInfo* mappings,
size_t mappings_len,
const char* ext) {
size_t ext_len = strlen(ext);
for (size_t i = 0; i < mappings_len; ++i) {
const char* extensions = mappings[i].extensions;
for (;;) {
size_t end_pos = strcspn(extensions, ",");
if (end_pos == ext_len &&
base::strncasecmp(extensions, ext, ext_len) == 0)
return mappings[i].mime_type;
extensions += end_pos;
if (!*extensions)
break;
extensions += 1; // skip over comma
}
}
return NULL;
}
bool MimeUtil::GetMimeTypeFromExtension(const base::FilePath::StringType& ext,
string* result) const {
return GetMimeTypeFromExtensionHelper(ext, true, result);
}
bool MimeUtil::GetWellKnownMimeTypeFromExtension(
const base::FilePath::StringType& ext,
string* result) const {
return GetMimeTypeFromExtensionHelper(ext, false, result);
}
bool MimeUtil::GetMimeTypeFromFile(const base::FilePath& file_path,
string* result) const {
base::FilePath::StringType file_name_str = file_path.Extension();
if (file_name_str.empty())
return false;
return GetMimeTypeFromExtension(file_name_str.substr(1), result);
}
bool MimeUtil::GetMimeTypeFromExtensionHelper(
const base::FilePath::StringType& ext,
bool include_platform_types,
string* result) const {
// Avoids crash when unable to handle a long file path. See crbug.com/48733.
const unsigned kMaxFilePathSize = 65536;
if (ext.length() > kMaxFilePathSize)
return false;
// We implement the same algorithm as Mozilla for mapping a file extension to
// a mime type. That is, we first check a hard-coded list (that cannot be
// overridden), and then if not found there, we defer to the system registry.
// Finally, we scan a secondary hard-coded list to catch types that we can
// deduce but that we also want to allow the OS to override.
base::FilePath path_ext(ext);
const string ext_narrow_str = path_ext.AsUTF8Unsafe();
const char* mime_type = FindMimeType(primary_mappings,
arraysize(primary_mappings),
ext_narrow_str.c_str());
if (mime_type) {
*result = mime_type;
return true;
}
if (include_platform_types && GetPlatformMimeTypeFromExtension(ext, result))
return true;
mime_type = FindMimeType(secondary_mappings, arraysize(secondary_mappings),
ext_narrow_str.c_str());
if (mime_type) {
*result = mime_type;
return true;
}
return false;
}
// From WebKit's WebCore/platform/MIMETypeRegistry.cpp:
static const char* const supported_image_types[] = {
"image/jpeg",
"image/pjpeg",
"image/jpg",
"image/webp",
"image/png",
"image/gif",
"image/bmp",
"image/vnd.microsoft.icon", // ico
"image/x-icon", // ico
"image/x-xbitmap" // xbm
};
// A list of media types: http://en.wikipedia.org/wiki/Internet_media_type
// A comprehensive mime type list: http://plugindoc.mozdev.org/winmime.php
// This set of codecs is supported by all variations of Chromium.
static const char* const common_media_types[] = {
// Ogg.
"audio/ogg",
"application/ogg",
#if !defined(OS_ANDROID) // Android doesn't support Ogg Theora.
"video/ogg",
#endif
// WebM.
"video/webm",
"audio/webm",
// Wav.
"audio/wav",
"audio/x-wav",
};
// List of proprietary types only supported by Google Chrome.
static const char* const proprietary_media_types[] = {
// MPEG-4.
"video/mp4",
"video/x-m4v",
"audio/mp4",
"audio/x-m4a",
// MP3.
"audio/mp3",
"audio/x-mp3",
"audio/mpeg",
};
// List of supported codecs when passed in with <source type="...">.
// This set of codecs is supported by all variations of Chromium.
//
// Refer to http://wiki.whatwg.org/wiki/Video_type_parameters#Browser_Support
// for more information.
//
// The codecs for WAV are integers as defined in Appendix A of RFC2361:
// http://tools.ietf.org/html/rfc2361
static const char* const common_media_codecs[] = {
#if !defined(OS_ANDROID) // Android doesn't support Ogg Theora.
"theora",
#endif
"opus",
"vorbis",
"vp8",
"vp9",
"1" // WAVE_FORMAT_PCM.
};
// List of proprietary codecs only supported by Google Chrome.
static const char* const proprietary_media_codecs[] = {
"avc1",
"avc3",
"mp4a"
};
// Note:
// - does not include javascript types list (see supported_javascript_types)
// - does not include types starting with "text/" (see
// IsSupportedNonImageMimeType())
static const char* const supported_non_image_types[] = {
"image/svg+xml", // SVG is text-based XML, even though it has an image/ type
"application/xml",
"application/atom+xml",
"application/rss+xml",
"application/xhtml+xml",
"application/json",
"multipart/related", // For MHTML support.
"multipart/x-mixed-replace"
// Note: ADDING a new type here will probably render it AS HTML. This can
// result in cross site scripting.
};
// Dictionary of cryptographic file mime types.
struct CertificateMimeTypeInfo {
const char* mime_type;
CertificateMimeType cert_type;
};
static const CertificateMimeTypeInfo supported_certificate_types[] = {
{ "application/x-x509-user-cert",
CERTIFICATE_MIME_TYPE_X509_USER_CERT },
#if defined(OS_ANDROID)
{ "application/x-x509-ca-cert", CERTIFICATE_MIME_TYPE_X509_CA_CERT },
{ "application/x-pkcs12", CERTIFICATE_MIME_TYPE_PKCS12_ARCHIVE },
#endif
};
// These types are excluded from the logic that allows all text/ types because
// while they are technically text, it's very unlikely that a user expects to
// see them rendered in text form.
static const char* const unsupported_text_types[] = {
"text/calendar",
"text/x-calendar",
"text/x-vcalendar",
"text/vcalendar",
"text/vcard",
"text/x-vcard",
"text/directory",
"text/ldif",
"text/qif",
"text/x-qif",
"text/x-csv",
"text/x-vcf",
"text/rtf",
"text/comma-separated-values",
"text/csv",
"text/tab-separated-values",
"text/tsv",
"text/ofx", // http://crbug.com/162238
"text/vnd.sun.j2me.app-descriptor" // http://crbug.com/176450
};
// Mozilla 1.8 and WinIE 7 both accept text/javascript and text/ecmascript.
// Mozilla 1.8 accepts application/javascript, application/ecmascript, and
// application/x-javascript, but WinIE 7 doesn't.
// WinIE 7 accepts text/javascript1.1 - text/javascript1.3, text/jscript, and
// text/livescript, but Mozilla 1.8 doesn't.
// Mozilla 1.8 allows leading and trailing whitespace, but WinIE 7 doesn't.
// Mozilla 1.8 and WinIE 7 both accept the empty string, but neither accept a
// whitespace-only string.
// We want to accept all the values that either of these browsers accept, but
// not other values.
static const char* const supported_javascript_types[] = {
"text/javascript",
"text/ecmascript",
"application/javascript",
"application/ecmascript",
"application/x-javascript",
"text/javascript1.1",
"text/javascript1.2",
"text/javascript1.3",
"text/jscript",
"text/livescript"
};
#if defined(OS_ANDROID)
static bool IsCodecSupportedOnAndroid(const std::string& codec) {
// VP9 is supported only in KitKat+ (API Level 19).
if ((!codec.compare("vp9") || !codec.compare("vp9.0")) &&
base::android::BuildInfo::GetInstance()->sdk_int() < 19) {
return false;
}
// TODO(vigneshv): Change this similar to the VP9 check once Opus is
// supported on Android (http://crbug.com/318436).
if (!codec.compare("opus")) {
return false;
}
return true;
}
#endif
struct MediaFormatStrict {
const char* mime_type;
const char* codecs_list;
};
static const MediaFormatStrict format_codec_mappings[] = {
{ "video/webm", "opus,vorbis,vp8,vp8.0,vp9,vp9.0" },
{ "audio/webm", "opus,vorbis" },
{ "audio/wav", "1" }
};
MimeUtil::MimeUtil() {
InitializeMimeTypeMaps();
}
// static
bool MimeUtil::AreSupportedCodecs(const MimeMappings& supported_codecs,
const std::vector<std::string>& codecs) {
for (size_t i = 0; i < codecs.size(); ++i) {
if (supported_codecs.find(codecs[i]) == supported_codecs.end())
return false;
}
return !codecs.empty();
}
void MimeUtil::InitializeMimeTypeMaps() {
for (size_t i = 0; i < arraysize(supported_image_types); ++i)
image_map_.insert(supported_image_types[i]);
// Initialize the supported non-image types.
for (size_t i = 0; i < arraysize(supported_non_image_types); ++i)
non_image_map_.insert(supported_non_image_types[i]);
for (size_t i = 0; i < arraysize(supported_certificate_types); ++i)
non_image_map_.insert(supported_certificate_types[i].mime_type);
for (size_t i = 0; i < arraysize(unsupported_text_types); ++i)
unsupported_text_map_.insert(unsupported_text_types[i]);
for (size_t i = 0; i < arraysize(supported_javascript_types); ++i)
non_image_map_.insert(supported_javascript_types[i]);
for (size_t i = 0; i < arraysize(common_media_types); ++i)
non_image_map_.insert(common_media_types[i]);
#if defined(USE_PROPRIETARY_CODECS)
for (size_t i = 0; i < arraysize(proprietary_media_types); ++i)
non_image_map_.insert(proprietary_media_types[i]);
#endif
// Initialize the supported media types.
for (size_t i = 0; i < arraysize(common_media_types); ++i)
media_map_.insert(common_media_types[i]);
#if defined(USE_PROPRIETARY_CODECS)
for (size_t i = 0; i < arraysize(proprietary_media_types); ++i)
media_map_.insert(proprietary_media_types[i]);
#endif
for (size_t i = 0; i < arraysize(supported_javascript_types); ++i)
javascript_map_.insert(supported_javascript_types[i]);
for (size_t i = 0; i < arraysize(common_media_codecs); ++i) {
#if defined(OS_ANDROID)
if (!IsCodecSupportedOnAndroid(common_media_codecs[i]))
continue;
#endif
codecs_map_.insert(common_media_codecs[i]);
}
#if defined(USE_PROPRIETARY_CODECS)
for (size_t i = 0; i < arraysize(proprietary_media_codecs); ++i)
codecs_map_.insert(proprietary_media_codecs[i]);
#endif
// Initialize the strict supported media types.
for (size_t i = 0; i < arraysize(format_codec_mappings); ++i) {
std::vector<std::string> mime_type_codecs;
ParseCodecString(format_codec_mappings[i].codecs_list,
&mime_type_codecs,
false);
MimeMappings codecs;
for (size_t j = 0; j < mime_type_codecs.size(); ++j) {
#if defined(OS_ANDROID)
if (!IsCodecSupportedOnAndroid(mime_type_codecs[j]))
continue;
#endif
codecs.insert(mime_type_codecs[j]);
}
strict_format_map_[format_codec_mappings[i].mime_type] = codecs;
}
}
bool MimeUtil::IsSupportedImageMimeType(const std::string& mime_type) const {
return image_map_.find(mime_type) != image_map_.end();
}
bool MimeUtil::IsSupportedMediaMimeType(const std::string& mime_type) const {
return media_map_.find(mime_type) != media_map_.end();
}
bool MimeUtil::IsSupportedNonImageMimeType(const std::string& mime_type) const {
return non_image_map_.find(mime_type) != non_image_map_.end() ||
(mime_type.compare(0, 5, "text/") == 0 &&
!IsUnsupportedTextMimeType(mime_type));
}
bool MimeUtil::IsUnsupportedTextMimeType(const std::string& mime_type) const {
return unsupported_text_map_.find(mime_type) != unsupported_text_map_.end();
}
bool MimeUtil::IsSupportedJavascriptMimeType(
const std::string& mime_type) const {
return javascript_map_.find(mime_type) != javascript_map_.end();
}
// Mirrors WebViewImpl::CanShowMIMEType()
bool MimeUtil::IsSupportedMimeType(const std::string& mime_type) const {
return (mime_type.compare(0, 6, "image/") == 0 &&
IsSupportedImageMimeType(mime_type)) ||
IsSupportedNonImageMimeType(mime_type);
}
// Tests for MIME parameter equality. Each parameter in the |mime_type_pattern|
// must be matched by a parameter in the |mime_type|. If there are no
// parameters in the pattern, the match is a success.
bool MatchesMimeTypeParameters(const std::string& mime_type_pattern,
const std::string& mime_type) {
const std::string::size_type semicolon = mime_type_pattern.find(';');
const std::string::size_type test_semicolon = mime_type.find(';');
if (semicolon != std::string::npos) {
if (test_semicolon == std::string::npos)
return false;
std::vector<std::string> pattern_parameters;
base::SplitString(mime_type_pattern.substr(semicolon + 1),
';', &pattern_parameters);
std::vector<std::string> test_parameters;
base::SplitString(mime_type.substr(test_semicolon + 1),
';', &test_parameters);
sort(pattern_parameters.begin(), pattern_parameters.end());
sort(test_parameters.begin(), test_parameters.end());
std::vector<std::string> difference =
base::STLSetDifference<std::vector<std::string> >(pattern_parameters,
test_parameters);
return difference.size() == 0;
}
return true;
}
// This comparison handles absolute maching and also basic
// wildcards. The plugin mime types could be:
// application/x-foo
// application/*
// application/*+xml
// *
// Also tests mime parameters -- all parameters in the pattern must be present
// in the tested type for a match to succeed.
bool MimeUtil::MatchesMimeType(const std::string& mime_type_pattern,
const std::string& mime_type) const {
// Verify caller is passing lowercase strings.
DCHECK_EQ(StringToLowerASCII(mime_type_pattern), mime_type_pattern);
DCHECK_EQ(StringToLowerASCII(mime_type), mime_type);
if (mime_type_pattern.empty())
return false;
std::string::size_type semicolon = mime_type_pattern.find(';');
const std::string base_pattern(mime_type_pattern.substr(0, semicolon));
semicolon = mime_type.find(';');
const std::string base_type(mime_type.substr(0, semicolon));
if (base_pattern == "*" || base_pattern == "*/*")
return MatchesMimeTypeParameters(mime_type_pattern, mime_type);
const std::string::size_type star = base_pattern.find('*');
if (star == std::string::npos) {
if (base_pattern == base_type)
return MatchesMimeTypeParameters(mime_type_pattern, mime_type);
else
return false;
}
// Test length to prevent overlap between |left| and |right|.
if (base_type.length() < base_pattern.length() - 1)
return false;
const std::string left(base_pattern.substr(0, star));
const std::string right(base_pattern.substr(star + 1));
if (base_type.find(left) != 0)
return false;
if (!right.empty() &&
base_type.rfind(right) != base_type.length() - right.length())
return false;
return MatchesMimeTypeParameters(mime_type_pattern, mime_type);
}
// See http://www.iana.org/assignments/media-types/index.html
static const char* legal_top_level_types[] = {
"application/",
"audio/",
"example/",
"image/",
"message/",
"model/",
"multipart/",
"text/",
"video/",
};
bool MimeUtil::IsMimeType(const std::string& type_string) const {
// MIME types are always ASCII and case-insensitive (at least, the top-level
// and secondary types we care about).
if (!IsStringASCII(type_string))
return false;
if (type_string == "*/*" || type_string == "*")
return true;
for (size_t i = 0; i < arraysize(legal_top_level_types); ++i) {
if (StartsWithASCII(type_string, legal_top_level_types[i], false) &&
type_string.length() > strlen(legal_top_level_types[i])) {
return true;
}
}
// If there's a "/" separator character, and the token before it is
// "x-" + (ascii characters), it is also a MIME type.
size_t slash = type_string.find('/');
if (slash < 3 ||
slash == std::string::npos || slash == type_string.length() - 1) {
return false;
}
if (StartsWithASCII(type_string, "x-", false))
return true;
return false;
}
bool MimeUtil::AreSupportedMediaCodecs(
const std::vector<std::string>& codecs) const {
return AreSupportedCodecs(codecs_map_, codecs);
}
void MimeUtil::ParseCodecString(const std::string& codecs,
std::vector<std::string>* codecs_out,
bool strip) {
std::string no_quote_codecs;
base::TrimString(codecs, "\"", &no_quote_codecs);
base::SplitString(no_quote_codecs, ',', codecs_out);
if (!strip)
return;
// Strip everything past the first '.'
for (std::vector<std::string>::iterator it = codecs_out->begin();
it != codecs_out->end();
++it) {
size_t found = it->find_first_of('.');
if (found != std::string::npos)
it->resize(found);
}
}
bool MimeUtil::IsStrictMediaMimeType(const std::string& mime_type) const {
if (strict_format_map_.find(mime_type) == strict_format_map_.end())
return false;
return true;
}
bool MimeUtil::IsSupportedStrictMediaMimeType(
const std::string& mime_type,
const std::vector<std::string>& codecs) const {
StrictMappings::const_iterator it = strict_format_map_.find(mime_type);
return (it != strict_format_map_.end()) &&
AreSupportedCodecs(it->second, codecs);
}
void MimeUtil::RemoveProprietaryMediaTypesAndCodecsForTests() {
for (size_t i = 0; i < arraysize(proprietary_media_types); ++i) {
non_image_map_.erase(proprietary_media_types[i]);
media_map_.erase(proprietary_media_types[i]);
}
for (size_t i = 0; i < arraysize(proprietary_media_codecs); ++i)
codecs_map_.erase(proprietary_media_codecs[i]);
}
//----------------------------------------------------------------------------
// Wrappers for the singleton
//----------------------------------------------------------------------------
bool GetMimeTypeFromExtension(const base::FilePath::StringType& ext,
std::string* mime_type) {
return g_mime_util.Get().GetMimeTypeFromExtension(ext, mime_type);
}
bool GetMimeTypeFromFile(const base::FilePath& file_path,
std::string* mime_type) {
return g_mime_util.Get().GetMimeTypeFromFile(file_path, mime_type);
}
bool GetWellKnownMimeTypeFromExtension(const base::FilePath::StringType& ext,
std::string* mime_type) {
return g_mime_util.Get().GetWellKnownMimeTypeFromExtension(ext, mime_type);
}
bool GetPreferredExtensionForMimeType(const std::string& mime_type,
base::FilePath::StringType* extension) {
return g_mime_util.Get().GetPreferredExtensionForMimeType(mime_type,
extension);
}
bool IsSupportedImageMimeType(const std::string& mime_type) {
return g_mime_util.Get().IsSupportedImageMimeType(mime_type);
}
bool IsSupportedMediaMimeType(const std::string& mime_type) {
return g_mime_util.Get().IsSupportedMediaMimeType(mime_type);
}
bool IsSupportedNonImageMimeType(const std::string& mime_type) {
return g_mime_util.Get().IsSupportedNonImageMimeType(mime_type);
}
bool IsUnsupportedTextMimeType(const std::string& mime_type) {
return g_mime_util.Get().IsUnsupportedTextMimeType(mime_type);
}
bool IsSupportedJavascriptMimeType(const std::string& mime_type) {
return g_mime_util.Get().IsSupportedJavascriptMimeType(mime_type);
}
bool IsSupportedMimeType(const std::string& mime_type) {
return g_mime_util.Get().IsSupportedMimeType(mime_type);
}
bool MatchesMimeType(const std::string& mime_type_pattern,
const std::string& mime_type) {
return g_mime_util.Get().MatchesMimeType(mime_type_pattern, mime_type);
}
bool IsMimeType(const std::string& type_string) {
return g_mime_util.Get().IsMimeType(type_string);
}
bool AreSupportedMediaCodecs(const std::vector<std::string>& codecs) {
return g_mime_util.Get().AreSupportedMediaCodecs(codecs);
}
bool IsStrictMediaMimeType(const std::string& mime_type) {
return g_mime_util.Get().IsStrictMediaMimeType(mime_type);
}
bool IsSupportedStrictMediaMimeType(const std::string& mime_type,
const std::vector<std::string>& codecs) {
return g_mime_util.Get().IsSupportedStrictMediaMimeType(mime_type, codecs);
}
void ParseCodecString(const std::string& codecs,
std::vector<std::string>* codecs_out,
const bool strip) {
g_mime_util.Get().ParseCodecString(codecs, codecs_out, strip);
}
namespace {
// From http://www.w3schools.com/media/media_mimeref.asp and
// http://plugindoc.mozdev.org/winmime.php
static const char* const kStandardImageTypes[] = {
"image/bmp",
"image/cis-cod",
"image/gif",
"image/ief",
"image/jpeg",
"image/webp",
"image/pict",
"image/pipeg",
"image/png",
"image/svg+xml",
"image/tiff",
"image/vnd.microsoft.icon",
"image/x-cmu-raster",
"image/x-cmx",
"image/x-icon",
"image/x-portable-anymap",
"image/x-portable-bitmap",
"image/x-portable-graymap",
"image/x-portable-pixmap",
"image/x-rgb",
"image/x-xbitmap",
"image/x-xpixmap",
"image/x-xwindowdump"
};
static const char* const kStandardAudioTypes[] = {
"audio/aac",
"audio/aiff",
"audio/amr",
"audio/basic",
"audio/midi",
"audio/mp3",
"audio/mp4",
"audio/mpeg",
"audio/mpeg3",
"audio/ogg",
"audio/vorbis",
"audio/wav",
"audio/webm",
"audio/x-m4a",
"audio/x-ms-wma",
"audio/vnd.rn-realaudio",
"audio/vnd.wave"
};
static const char* const kStandardVideoTypes[] = {
"video/avi",
"video/divx",
"video/flc",
"video/mp4",
"video/mpeg",
"video/ogg",
"video/quicktime",
"video/sd-video",
"video/webm",
"video/x-dv",
"video/x-m4v",
"video/x-mpeg",
"video/x-ms-asf",
"video/x-ms-wmv"
};
struct StandardType {
const char* leading_mime_type;
const char* const* standard_types;
size_t standard_types_len;
};
static const StandardType kStandardTypes[] = {
{ "image/", kStandardImageTypes, arraysize(kStandardImageTypes) },
{ "audio/", kStandardAudioTypes, arraysize(kStandardAudioTypes) },
{ "video/", kStandardVideoTypes, arraysize(kStandardVideoTypes) },
{ NULL, NULL, 0 }
};
void GetExtensionsFromHardCodedMappings(
const MimeInfo* mappings,
size_t mappings_len,
const std::string& leading_mime_type,
base::hash_set<base::FilePath::StringType>* extensions) {
base::FilePath::StringType extension;
for (size_t i = 0; i < mappings_len; ++i) {
if (StartsWithASCII(mappings[i].mime_type, leading_mime_type, false)) {
std::vector<string> this_extensions;
base::SplitStringUsingSubstr(mappings[i].extensions, ",",
&this_extensions);
for (size_t j = 0; j < this_extensions.size(); ++j) {
#if defined(OS_WIN)
base::FilePath::StringType extension(UTF8ToWide(this_extensions[j]));
#else
base::FilePath::StringType extension(this_extensions[j]);
#endif
extensions->insert(extension);
}
}
}
}
void GetExtensionsHelper(
const char* const* standard_types,
size_t standard_types_len,
const std::string& leading_mime_type,
base::hash_set<base::FilePath::StringType>* extensions) {
for (size_t i = 0; i < standard_types_len; ++i) {
g_mime_util.Get().GetPlatformExtensionsForMimeType(standard_types[i],
extensions);
}
// Also look up the extensions from hard-coded mappings in case that some
// supported extensions are not registered in the system registry, like ogg.
GetExtensionsFromHardCodedMappings(primary_mappings,
arraysize(primary_mappings),
leading_mime_type,
extensions);
GetExtensionsFromHardCodedMappings(secondary_mappings,
arraysize(secondary_mappings),
leading_mime_type,
extensions);
}
// Note that the elements in the source set will be appended to the target
// vector.
template<class T>
void HashSetToVector(base::hash_set<T>* source, std::vector<T>* target) {
size_t old_target_size = target->size();
target->resize(old_target_size + source->size());
size_t i = 0;
for (typename base::hash_set<T>::iterator iter = source->begin();
iter != source->end(); ++iter, ++i)
(*target)[old_target_size + i] = *iter;
}
}
void GetExtensionsForMimeType(
const std::string& unsafe_mime_type,
std::vector<base::FilePath::StringType>* extensions) {
if (unsafe_mime_type == "*/*" || unsafe_mime_type == "*")
return;
const std::string mime_type = StringToLowerASCII(unsafe_mime_type);
base::hash_set<base::FilePath::StringType> unique_extensions;
if (EndsWith(mime_type, "/*", true)) {
std::string leading_mime_type = mime_type.substr(0, mime_type.length() - 1);
// Find the matching StandardType from within kStandardTypes, or fall
// through to the last (default) StandardType.
const StandardType* type = NULL;
for (size_t i = 0; i < arraysize(kStandardTypes); ++i) {
type = &(kStandardTypes[i]);
if (type->leading_mime_type &&
leading_mime_type == type->leading_mime_type)
break;
}
DCHECK(type);
GetExtensionsHelper(type->standard_types,
type->standard_types_len,
leading_mime_type,
&unique_extensions);
} else {
g_mime_util.Get().GetPlatformExtensionsForMimeType(mime_type,
&unique_extensions);
// Also look up the extensions from hard-coded mappings in case that some
// supported extensions are not registered in the system registry, like ogg.
GetExtensionsFromHardCodedMappings(primary_mappings,
arraysize(primary_mappings),
mime_type,
&unique_extensions);
GetExtensionsFromHardCodedMappings(secondary_mappings,
arraysize(secondary_mappings),
mime_type,
&unique_extensions);
}
HashSetToVector(&unique_extensions, extensions);
}
void RemoveProprietaryMediaTypesAndCodecsForTests() {
g_mime_util.Get().RemoveProprietaryMediaTypesAndCodecsForTests();
}
const std::string GetIANAMediaType(const std::string& mime_type) {
for (size_t i = 0; i < arraysize(kIanaMediaTypes); ++i) {
if (StartsWithASCII(mime_type, kIanaMediaTypes[i].matcher, true)) {
return kIanaMediaTypes[i].name;
}
}
return std::string();
}
CertificateMimeType GetCertificateMimeTypeForMimeType(
const std::string& mime_type) {
// Don't create a map, there is only one entry in the table,
// except on Android.
for (size_t i = 0; i < arraysize(supported_certificate_types); ++i) {
if (mime_type == net::supported_certificate_types[i].mime_type)
return net::supported_certificate_types[i].cert_type;
}
return CERTIFICATE_MIME_TYPE_UNKNOWN;
}
bool IsSupportedCertificateMimeType(const std::string& mime_type) {
CertificateMimeType file_type =
GetCertificateMimeTypeForMimeType(mime_type);
return file_type != CERTIFICATE_MIME_TYPE_UNKNOWN;
}
void AddMultipartValueForUpload(const std::string& value_name,
const std::string& value,
const std::string& mime_boundary,
const std::string& content_type,
std::string* post_data) {
DCHECK(post_data);
// First line is the boundary.
post_data->append("--" + mime_boundary + "\r\n");
// Next line is the Content-disposition.
post_data->append("Content-Disposition: form-data; name=\"" +
value_name + "\"\r\n");
if (!content_type.empty()) {
// If Content-type is specified, the next line is that.
post_data->append("Content-Type: " + content_type + "\r\n");
}
// Leave an empty line and append the value.
post_data->append("\r\n" + value + "\r\n");
}
void AddMultipartFinalDelimiterForUpload(const std::string& mime_boundary,
std::string* post_data) {
DCHECK(post_data);
post_data->append("--" + mime_boundary + "--\r\n");
}
} // namespace net