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      1 /*
      2  * Copyright (c) 2008, 2009, Google Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions are
      6  * met:
      7  *
      8  *     * Redistributions of source code must retain the above copyright
      9  * notice, this list of conditions and the following disclaimer.
     10  *     * Redistributions in binary form must reproduce the above
     11  * copyright notice, this list of conditions and the following disclaimer
     12  * in the documentation and/or other materials provided with the
     13  * distribution.
     14  *     * Neither the name of Google Inc. nor the names of its
     15  * contributors may be used to endorse or promote products derived from
     16  * this software without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 
     31 #include "config.h"
     32 #include "MIMETypeRegistry.h"
     33 
     34 #include "MediaPlayer.h"
     35 #include "PlatformBridge.h"
     36 #include "PluginDataChromium.h"
     37 #include <wtf/text/CString.h>
     38 
     39 // NOTE: Unlike other ports, we don't use the shared implementation bits in
     40 // MIMETypeRegistry.cpp.  Instead, we need to route most functions via the
     41 // PlatformBridge to the embedder.
     42 
     43 namespace WebCore {
     44 
     45 #if ENABLE(FILE_SYSTEM) && ENABLE(WORKERS)
     46 String MIMETypeRegistry::getMIMETypeForExtensionThreadSafe(const String &ext)
     47 {
     48     return PlatformBridge::mimeTypeForExtension(ext);
     49 }
     50 #endif
     51 
     52 // NOTE: We have to define getMIMETypeForExtension() here though the shared
     53 // implementation has getMIMETypeForExtension() since we don't use the shared
     54 // implementation bits in MIMETypeRegistry.cpp.
     55 
     56 String MIMETypeRegistry::getMIMETypeForExtension(const String &ext)
     57 {
     58     return PlatformBridge::mimeTypeForExtension(ext);
     59 }
     60 
     61 // Returns the file extension if one is found.  Does not include the dot in the
     62 // filename.  E.g., 'html'.
     63 String MIMETypeRegistry::getPreferredExtensionForMIMEType(const String& type)
     64 {
     65     // Prune out any parameters in case they happen to have snuck in there...
     66     // FIXME: Is this really necessary??
     67     String mimeType = type.substring(0, static_cast<unsigned>(type.find(';')));
     68 
     69     String ext = PlatformBridge::preferredExtensionForMIMEType(type);
     70     if (!ext.isEmpty() && ext[0] == '.')
     71         ext = ext.substring(1);
     72 
     73     return ext;
     74 }
     75 
     76 String MIMETypeRegistry::getMIMETypeForPath(const String& path)
     77 {
     78     int pos = path.reverseFind('.');
     79     if (pos < 0)
     80         return "application/octet-stream";
     81     String extension = path.substring(pos + 1);
     82     String mimeType = getMIMETypeForExtension(extension);
     83     if (mimeType.isEmpty()) {
     84         // If there's no mimetype registered for the extension, check to see
     85         // if a plugin can handle the extension.
     86         mimeType = getPluginMimeTypeFromExtension(extension);
     87     }
     88     if (mimeType.isEmpty())
     89         return "application/octet-stream";
     90     return mimeType;
     91 }
     92 
     93 bool MIMETypeRegistry::isSupportedImageMIMEType(const String& mimeType)
     94 {
     95     return PlatformBridge::isSupportedImageMIMEType(mimeType);
     96 }
     97 
     98 bool MIMETypeRegistry::isSupportedImageResourceMIMEType(const String& mimeType)
     99 {
    100     return isSupportedImageMIMEType(mimeType);
    101 }
    102 
    103 bool MIMETypeRegistry::isSupportedImageMIMETypeForEncoding(const String& mimeType)
    104 {
    105     return mimeType == "image/jpeg" || mimeType == "image/png";
    106 }
    107 
    108 bool MIMETypeRegistry::isSupportedJavaScriptMIMEType(const String& mimeType)
    109 {
    110     return PlatformBridge::isSupportedJavaScriptMIMEType(mimeType);
    111 }
    112 
    113 bool MIMETypeRegistry::isSupportedNonImageMIMEType(const String& mimeType)
    114 {
    115     return PlatformBridge::isSupportedNonImageMIMEType(mimeType);
    116 }
    117 
    118 bool MIMETypeRegistry::isSupportedMediaMIMEType(const String& mimeType)
    119 {
    120     HashSet<String> supportedMediaMIMETypes;
    121 #if ENABLE(VIDEO)
    122     MediaPlayer::getSupportedTypes(supportedMediaMIMETypes);
    123 #endif
    124     return !mimeType.isEmpty() && supportedMediaMIMETypes.contains(mimeType);
    125 }
    126 
    127 bool MIMETypeRegistry::isJavaAppletMIMEType(const String& mimeType)
    128 {
    129     // Since this set is very limited and is likely to remain so we won't bother with the overhead
    130     // of using a hash set.
    131     // Any of the MIME types below may be followed by any number of specific versions of the JVM,
    132     // which is why we use startsWith()
    133     return mimeType.startsWith("application/x-java-applet", false)
    134         || mimeType.startsWith("application/x-java-bean", false)
    135         || mimeType.startsWith("application/x-java-vm", false);
    136 }
    137 
    138 String MIMETypeRegistry::getMediaMIMETypeForExtension(const String&)
    139 {
    140     return String();
    141 }
    142 
    143 bool MIMETypeRegistry::isApplicationPluginMIMEType(const String&)
    144 {
    145     return false;
    146 }
    147 
    148 static HashSet<String>& dummyHashSet()
    149 {
    150     ASSERT_NOT_REACHED();
    151     static HashSet<String> dummy;
    152     return dummy;
    153 }
    154 
    155 // NOTE: the following methods should never be reached
    156 HashSet<String>& MIMETypeRegistry::getSupportedImageMIMETypes() { return dummyHashSet(); }
    157 HashSet<String>& MIMETypeRegistry::getSupportedImageResourceMIMETypes() { return dummyHashSet(); }
    158 HashSet<String>& MIMETypeRegistry::getSupportedImageMIMETypesForEncoding() { return dummyHashSet(); }
    159 HashSet<String>& MIMETypeRegistry::getSupportedNonImageMIMETypes() { return dummyHashSet(); }
    160 HashSet<String>& MIMETypeRegistry::getSupportedMediaMIMETypes() { return dummyHashSet(); }
    161 
    162 } // namespace WebCore
    163