jodd.util.MimeTypes Maven / Gradle / Ivy
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// Copyright (c) 2003-2014, Jodd Team (jodd.org). All Rights Reserved.
package jodd.util;
import jodd.io.StreamUtil;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;
/**
* Map file extensions to MIME types. Based on the most recent Apache mime.types file.
* Duplicated extensions (wmz, sub) are manually resolved.
*
* See also:
* http://www.iana.org/assignments/media-types/
* http://www.webmaster-toolkit.com/mime-types.shtml
*/
public class MimeTypes {
public static final String MIME_APPLICATION_ATOM_XML = "application/atom+xml";
public static final String MIME_APPLICATION_JAVASCRIPT = "application/javascript";
public static final String MIME_APPLICATION_JSON = "application/json";
public static final String MIME_APPLICATION_OCTET_STREAM = "application/octet-stream";
public static final String MIME_APPLICATION_XML = "application/xml";
public static final String MIME_TEXT_CSS = "text/css";
public static final String MIME_TEXT_PLAIN = "text/plain";
public static final String MIME_TEXT_HTML = "text/html";
private static final HashMap MIME_TYPE_MAP; // extension -> mime-type map
static {
Properties mimes = new Properties();
InputStream is = MimeTypes.class.getResourceAsStream(MimeTypes.class.getSimpleName() + ".properties");
if (is == null) {
throw new IllegalStateException("Mime types file missing");
}
try {
mimes.load(is);
}
catch (IOException ioex) {
throw new IllegalStateException(ioex.getMessage());
} finally {
StreamUtil.close(is);
}
MIME_TYPE_MAP = new HashMap(mimes.size() * 2);
Enumeration keys = mimes.propertyNames();
while (keys.hasMoreElements()) {
String mimeType = (String) keys.nextElement();
String extensions = mimes.getProperty(mimeType);
if (mimeType.startsWith("/")) {
mimeType = "application" + mimeType;
} else if (mimeType.startsWith("a/")) {
mimeType = "audio" + mimeType.substring(1);
} else if (mimeType.startsWith("i/")) {
mimeType = "image" + mimeType.substring(1);
} else if (mimeType.startsWith("t/")) {
mimeType = "text" + mimeType.substring(1);
} else if (mimeType.startsWith("v/")) {
mimeType = "video" + mimeType.substring(1);
}
String[] allExtensions = StringUtil.splitc(extensions, ' ');
for (String extension : allExtensions) {
if (MIME_TYPE_MAP.put(extension, mimeType) != null) {
throw new IllegalArgumentException("Duplicated extension: " + extension);
}
}
}
}
/**
* Registers MIME type for provided extension. Existing extension type will be overridden.
*/
public static void registerMimeType(String ext, String mimeType) {
MIME_TYPE_MAP.put(ext, mimeType);
}
/**
* Returns the corresponding MIME type to the given extension.
* If no MIME type was found it returns application/octet-stream
type.
*/
public static String getMimeType(String ext) {
String mimeType = lookupMimeType(ext);
if (mimeType == null) {
mimeType = MIME_APPLICATION_OCTET_STREAM;
}
return mimeType;
}
/**
* Simply returns MIME type or null
if no type is found.
*/
public static String lookupMimeType(String ext) {
return MIME_TYPE_MAP.get(ext.toLowerCase());
}
/**
* Finds all extensions that belong to given mime type(s).
* If wildcard mode is on, provided mime type is wildcard pattern.
* @param mimeType list of mime types, separated by comma
* @param useWildcard if set, mime types are wildcard patterns
*/
public static String[] findExtensionsByMimeTypes(String mimeType, boolean useWildcard) {
ArrayList extensions = new ArrayList();
mimeType = mimeType.toLowerCase();
String[] mimeTypes = StringUtil.splitc(mimeType, ", ");
for (Map.Entry entry : MIME_TYPE_MAP.entrySet()) {
String entryExtension = entry.getKey();
String entryMimeType = entry.getValue().toLowerCase();
int matchResult = useWildcard ?
Wildcard.matchOne(entryMimeType, mimeTypes) :
StringUtil.equalsOne(entryMimeType, mimeTypes);
if (matchResult != -1) {
extensions.add(entryExtension);
}
}
if (extensions.isEmpty()) {
return StringPool.EMPTY_ARRAY;
}
return extensions.toArray(new String[extensions.size()]);
}
}