- * - * 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: - *
- * (The current implementation looks for the {@code mime.types} file - * in the Java runtime in the directory java.home{@code /conf} - * if it exists, and otherwise in the directory - * java.home{@code /lib}, where java.home is the value - * of the "java.home" System property. Note that the "conf" directory was - * introduced in JDK 9.) - *
- * MIME types file format: - * - *
{@code
- * # comments begin with a '#'
- * # the format is
- * # for example:
- * text/plain txt text TXT
- * # this would map file.txt, file.text, and file.TXT to
- * # the mime type "text/plain"
- * }
- *
- * @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 final String defaultType = "application/octet-stream";
-
- private static final String confDir;
-
- static {
- String dir = null;
- try {
- dir = (String)AccessController.doPrivileged(
- new PrivilegedAction() {
- public Object run() {
- String home = System.getProperty("java.home");
- String newdir = home + File.separator + "conf";
- File conf = new File(newdir);
- if (conf.exists())
- return newdir + File.separator;
- else
- return home + File.separator + "lib" + File.separator;
- }
- });
- } catch (Exception ex) {
- // ignore any exceptions
- }
- confDir = dir;
- }
-
- /**
- * 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
- if (confDir != null) {
- mf = loadFile(confDir + "mime.types");
- 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
- * @exception IOException for errors reading the file
- */
- 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
- * {@code 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);
- }
- */
-}