.mime.types format. + * + * MIME types file search order:
+ * The MimetypesFileTypeMap looks in various places in the user's + * system for MIME types file entries. When requests are made + * to search for MIME types in the MimetypesFileTypeMap, it searches + * MIME types files in the following order: + *
+ *
.mime.types in the user's home directory.
+ * /lib/mime.types.
+ * META-INF/mime.types.
+ * META-INF/mimetypes.default
+ * (usually found only in the activation.jar file).
+ * + * MIME types file format:
+ *
+ *
+ * # comments begin with a '#'
+ *
+ * @author Bart Calder
+ * @author Bill Shannon
+ *
+ * @since 1.6
+ */
+public class MimetypesFileTypeMap extends FileTypeMap {
+ /*
+ * We manage a collection of databases, searched in order.
+ */
+ private MimeTypeFile[] DB;
+ private static final int PROG = 0; // programmatically added entries
+
+ private static String defaultType = "application/octet-stream";
+
+ /**
+ * The default constructor.
+ */
+ public MimetypesFileTypeMap() {
+ Vector dbv = new Vector(5); // usually 5 or less databases
+ MimeTypeFile mf = null;
+ dbv.addElement(null); // place holder for PROG entry
+
+ LogSupport.log("MimetypesFileTypeMap: load HOME");
+ try {
+ String user_home = System.getProperty("user.home");
+
+ if (user_home != null) {
+ String path = user_home + File.separator + ".mime.types";
+ mf = loadFile(path);
+ if (mf != null)
+ dbv.addElement(mf);
+ }
+ } catch (SecurityException ex) {}
+
+ LogSupport.log("MimetypesFileTypeMap: load SYS");
+ try {
+ // check system's home
+ String system_mimetypes = System.getProperty("java.home") +
+ File.separator + "lib" + File.separator + "mime.types";
+ mf = loadFile(system_mimetypes);
+ if (mf != null)
+ dbv.addElement(mf);
+ } catch (SecurityException ex) {}
+
+ LogSupport.log("MimetypesFileTypeMap: load JAR");
+ // load from the app's jar file
+ loadAllResources(dbv, "META-INF/mime.types");
+
+ LogSupport.log("MimetypesFileTypeMap: load DEF");
+ mf = loadResource("/META-INF/mimetypes.default");
+
+ if (mf != null)
+ dbv.addElement(mf);
+
+ DB = new MimeTypeFile[dbv.size()];
+ dbv.copyInto(DB);
+ }
+
+ /**
+ * Load from the named resource.
+ */
+ private MimeTypeFile loadResource(String name) {
+ InputStream clis = null;
+ try {
+ clis = SecuritySupport.getResourceAsStream(this.getClass(), name);
+ if (clis != null) {
+ MimeTypeFile mf = new MimeTypeFile(clis);
+ if (LogSupport.isLoggable())
+ LogSupport.log("MimetypesFileTypeMap: successfully " +
+ "loaded mime types file: " + name);
+ return mf;
+ } else {
+ if (LogSupport.isLoggable())
+ LogSupport.log("MimetypesFileTypeMap: not loading " +
+ "mime types file: " + name);
+ }
+ } catch (IOException e) {
+ if (LogSupport.isLoggable())
+ LogSupport.log("MimetypesFileTypeMap: can't load " + name, e);
+ } catch (SecurityException sex) {
+ if (LogSupport.isLoggable())
+ LogSupport.log("MimetypesFileTypeMap: can't load " + name, sex);
+ } finally {
+ try {
+ if (clis != null)
+ clis.close();
+ } catch (IOException ex) { } // ignore it
+ }
+ return null;
+ }
+
+ /**
+ * Load all of the named resource.
+ */
+ private void loadAllResources(Vector v, String name) {
+ boolean anyLoaded = false;
+ try {
+ URL[] urls;
+ ClassLoader cld = null;
+ // First try the "application's" class loader.
+ cld = SecuritySupport.getContextClassLoader();
+ if (cld == null)
+ cld = this.getClass().getClassLoader();
+ if (cld != null)
+ urls = SecuritySupport.getResources(cld, name);
+ else
+ urls = SecuritySupport.getSystemResources(name);
+ if (urls != null) {
+ if (LogSupport.isLoggable())
+ LogSupport.log("MimetypesFileTypeMap: getResources");
+ for (int i = 0; i < urls.length; i++) {
+ URL url = urls[i];
+ InputStream clis = null;
+ if (LogSupport.isLoggable())
+ LogSupport.log("MimetypesFileTypeMap: URL " + url);
+ try {
+ clis = SecuritySupport.openStream(url);
+ if (clis != null) {
+ v.addElement(new MimeTypeFile(clis));
+ anyLoaded = true;
+ if (LogSupport.isLoggable())
+ LogSupport.log("MimetypesFileTypeMap: " +
+ "successfully loaded " +
+ "mime types from URL: " + url);
+ } else {
+ if (LogSupport.isLoggable())
+ LogSupport.log("MimetypesFileTypeMap: " +
+ "not loading " +
+ "mime types from URL: " + url);
+ }
+ } catch (IOException ioex) {
+ if (LogSupport.isLoggable())
+ LogSupport.log("MimetypesFileTypeMap: can't load " +
+ url, ioex);
+ } catch (SecurityException sex) {
+ if (LogSupport.isLoggable())
+ LogSupport.log("MimetypesFileTypeMap: can't load " +
+ url, sex);
+ } finally {
+ try {
+ if (clis != null)
+ clis.close();
+ } catch (IOException cex) { }
+ }
+ }
+ }
+ } catch (Exception ex) {
+ if (LogSupport.isLoggable())
+ LogSupport.log("MimetypesFileTypeMap: can't load " + name, ex);
+ }
+
+ // if failed to load anything, fall back to old technique, just in case
+ if (!anyLoaded) {
+ LogSupport.log("MimetypesFileTypeMap: !anyLoaded");
+ MimeTypeFile mf = loadResource("/" + name);
+ if (mf != null)
+ v.addElement(mf);
+ }
+ }
+
+ /**
+ * Load the named file.
+ */
+ private MimeTypeFile loadFile(String name) {
+ MimeTypeFile mtf = null;
+
+ try {
+ mtf = new MimeTypeFile(name);
+ } catch (IOException e) {
+ // e.printStackTrace();
+ }
+ return mtf;
+ }
+
+ /**
+ * Construct a MimetypesFileTypeMap with programmatic entries
+ * added from the named file.
+ *
+ * @param mimeTypeFileName the file name
+ */
+ public MimetypesFileTypeMap(String mimeTypeFileName) throws IOException {
+ this();
+ DB[PROG] = new MimeTypeFile(mimeTypeFileName);
+ }
+
+ /**
+ * Construct a MimetypesFileTypeMap with programmatic entries
+ * added from the InputStream.
+ *
+ * @param is the input stream to read from
+ */
+ public MimetypesFileTypeMap(InputStream is) {
+ this();
+ try {
+ DB[PROG] = new MimeTypeFile(is);
+ } catch (IOException ex) {
+ // XXX - really should throw it
+ }
+ }
+
+ /**
+ * Prepend the MIME type values to the registry.
+ *
+ * @param mime_types A .mime.types formatted string of entries.
+ */
+ public synchronized void addMimeTypes(String mime_types) {
+ // check to see if we have created the registry
+ if (DB[PROG] == null)
+ DB[PROG] = new MimeTypeFile(); // make one
+
+ DB[PROG].appendToRegistry(mime_types);
+ }
+
+ /**
+ * Return the MIME type of the file object.
+ * The implementation in this class calls
+ *
+ * # the format is <mime type> <space separated file extensions>
+ * # for example:
+ * text/plain txt text TXT
+ * # this would map file.txt, file.text, and file.TXT to
+ * # the mime type "text/plain"
+ * getContentType(f.getName()).
+ *
+ * @param f the file
+ * @return the file's MIME type
+ */
+ public String getContentType(File f) {
+ return this.getContentType(f.getName());
+ }
+
+ /**
+ * Return the MIME type based on the specified file name.
+ * The MIME type entries are searched as described above under
+ * MIME types file search order.
+ * If no entry is found, the type "application/octet-stream" is returned.
+ *
+ * @param filename the file name
+ * @return the file's MIME type
+ */
+ public synchronized String getContentType(String filename) {
+ int dot_pos = filename.lastIndexOf("."); // period index
+
+ if (dot_pos < 0)
+ return defaultType;
+
+ String file_ext = filename.substring(dot_pos + 1);
+ if (file_ext.length() == 0)
+ return defaultType;
+
+ for (int i = 0; i < DB.length; i++) {
+ if (DB[i] == null)
+ continue;
+ String result = DB[i].getMIMETypeString(file_ext);
+ if (result != null)
+ return result;
+ }
+ return defaultType;
+ }
+
+ /**
+ * for debugging...
+ *
+ public static void main(String[] argv) throws Exception {
+ MimetypesFileTypeMap map = new MimetypesFileTypeMap();
+ System.out.println("File " + argv[0] + " has MIME type " +
+ map.getContentType(argv[0]));
+ System.exit(0);
+ }
+ */
+}