content: package com.alecgorge.minecraft.jsonapi;
  
  import java.io.BufferedReader;
  import java.io.ByteArrayInputStream;
  import java.io.File;
  import java.io.FileInputStream;
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.InputStreamReader;
  import java.io.OutputStream;
  import java.io.PrintWriter;
  import java.io.StringWriter;
  import java.io.UnsupportedEncodingException;
  import java.net.InetAddress;
  import java.net.ServerSocket;
  import java.net.Socket;
  import java.net.URLDecoder;
  import java.net.URLEncoder;
  import java.nio.charset.Charset;
  import java.security.MessageDigest;
  import java.security.NoSuchAlgorithmException;
  import java.util.Date;
  import java.util.Enumeration;
  import java.util.Hashtable;
  import java.util.Locale;
  import java.util.Properties;
  import java.util.StringTokenizer;
  import java.util.TimeZone;
  
  import javax.net.ServerSocketFactory;
  import javax.net.ssl.SSLServerSocketFactory;
  
  import org.java_websocket.util.Base64;
  
  import com.alecgorge.minecraft.jsonapi.util.SlimIOUtils;
  import com.alecgorge.minecraft.jsonapi.packets.Lambda;
  import com.alecgorge.minecraft.jsonapi.streams.StreamingResponse;
  
  /**
   * A simple, tiny, nicely embeddable HTTP 1.0 server in Java
   * 
   * <p>
   * NanoHTTPD version 1.14, Copyright &copy; 2001,2005-2010 Jarno Elonen
   * (elonen@iki.fi, http://iki.fi/elonen/)
   * 
   * <p>
   * <b>Features + limitations: </b>
   * <ul>
   * 
   * <li>Only one Java file</li>
   * <li>Java 1.1 compatible</li>
   * <li>Released as open source, Modified BSD licence</li>
   * <li>No fixed config files, logging, authorization etc. (Implement yourself if
   * you need them.)</li>
   * <li>Supports parameter parsing of GET and POST methods</li>
   * <li>Supports both dynamic content and file serving</li>
   * <li>Never caches anything</li>
   * <li>Doesn't limit bandwidth, request time or simultaneous connections</li>
   * <li>Default code serves files and shows all HTTP parameters and headers</li>
   * <li>File server supports directory listing, index.html and index.htm</li>
   * <li>File server does the 301 redirection trick for directories without '/'</li>
   * <li>File server supports simple skipping for files (continue download)</li>
   * <li>File server uses current directory as a web root</li>
   * <li>File server serves also very long files without memory overhead</li>
   * <li>Contains a built-in list of most common mime types</li>
   * <li>All header names are converted lowercase so they don't vary between
   * browsers/clients</li>
   * 
   * </ul>
   * 
   * <p>
   * <b>Ways to use: </b>
   * <ul>
   * 
   * <li>Run as a standalone app, serves files from current directory and shows
   * requests</li>
   * <li>Subclass serve() and embed to your own program</li>
   * <li>Call serveFile() from serve() with your own base directory</li>
   * 
   * </ul>
   * 
   * See the end of the source file for distribution license (Modified BSD
   * licence)
   */
  public class NanoHTTPD {
  	/**
  	 * Decodes the percent encoding scheme. <br/>
  	 * For example: "an+example%20string" -> "an example string"
  	 */
  	public static String decodePercent(String str) {
  		try {
  			return URLDecoder.decode(str, "UTF-8");
  		} catch (Exception e) {
  			e.printStackTrace();
  			return null;
  		}
  	}
  
  	/**
  	 * Decodes parameters in percent-encoded URI-format ( e.g.
  	 * "name=Jack%20Daniels&pass=Single%20Malt" ) and adds them to given
  	 * Properties. NOTE: this doesn't support multiple identical keys due to the
  	 * simplicity of Properties -- if you need multiples, you might want to
  	 * replace the Properties with a Hastable of Vectors or such.
  	 */
  	public static void decodeParms(String parms, Properties p) {
  		if (parms == null)
  			return;
  
  		StringTokenizer st = new StringTokenizer(parms, "&");
  		while (st.hasMoreTokens()) {
  			String e = st.nextToken();
  			int sep = e.indexOf('=');
  			if (sep >= 0)
  				p.put(decodePercent(e.substring(0, sep)).trim(), decodePercent(e.substring(sep + 1)));
  		}
  	}
  
  	// ==================================================
  	// API parts
  	// ==================================================
  
  	/**
  	 * Override this to customize the server.
  	 * <p>
  	 * 
  	 * (By default, this delegates to serveFile() and allows directory listing.)
  	 * 
  	 * @parm uri Percent-decoded URI without parameters, for example
  	 *       "/index.cgi"
  	 * @parm method "GET", "POST" etc.
  	 * @parm parms Parsed, percent decoded parameters from URI and, in case of
  	 *       POST, data.
  	 * @parm header Header entries, percent decoded
  	 * @return HTTP response, see class Response for details
  	 */
  	public Response serve(String uri, String method, Properties header, Properties parms) {
  		System.out.println(method + " '" + uri + "' ");
  
  		Enumeration<?> e = header.propertyNames();
  		while (e.hasMoreElements()) {
  			String value = (String) e.nextElement();
  			System.out.println("  HDR: '" + value + "' = '" + header.getProperty(value) + "'");
  		}
  		e = parms.propertyNames();
  		while (e.hasMoreElements()) {
  			String value = (String) e.nextElement();
  			System.out.println("  PRM: '" + value + "' = '" + parms.getProperty(value) + "'");
  		}
  
  		return serveFile(uri, header, new File("."), true);
  	}
  
  	/**
  	 * HTTP response. Return one of these from serve().
  	 */
  	public class Response {
  		/**
  		 * Default constructor: response = HTTP_OK, data = mime = 'null'
  		 */
  		public Response() {
  			this.status = HTTP_OK;
  		}
  
  		/**
  		 * Basic constructor.
  		 */
  		public Response(String status, String mimeType, InputStream data) {
  			this.status = status;
  			this.mimeType = mimeType;
  			this.data = data;
  		}
  
  		/**
  		 * Convenience method that makes an InputStream out of given text.
  		 */
  		public Response(String status, String mimeType, String txt) {
  			this.status = status;
  			this.mimeType = mimeType;
  			this.bytes = txt.getBytes(Charset.forName("UTF-8"));
  		}
  		
  		public Response(String status, String mimeType, byte[] bytes) {
  			this.status = status;
  			this.mimeType = mimeType;
  			this.bytes = bytes;
  		}
  
  		/**
  		 * Adds given line to the header.
  		 */
  		public void addHeader(String name, String value) {
  			header.put(name, value);
  		}
  
  		/**
  		 * HTTP status code after processing, e.g. "200 OK", HTTP_OK
  		 */
  		public String status;
  
  		/**
  		 * MIME type of content, e.g. "text/html"
  		 */
  		public String mimeType;
  
  		/**
  		 * Data of the response, may be null.
  		 */
  		public InputStream data;
  
  		/**
  		 * Headers for the HTTP response. Use addHeader() to add lines.
  		 */
  		public Properties header = new Properties();
  		
  		public byte[] bytes;
  	}
  	
  	public class WebSocketResponse extends Response {
  		public WebSocketResponse(Properties header) {
  			super("101 Switching Protocols", null, new byte[]{});
  			
  			String challenge = header.get("Sec-WebSocket-Key".toLowerCase()).toString();
  			challenge += "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
  			
  			addHeader("Upgrade", "websocket");
  			addHeader("Connection", "Upgrade");
  			try {
  				addHeader("Sec-WebSocket-Accept", toSHA1(challenge.getBytes("UTF-8")));
  			} catch (UnsupportedEncodingException e) {
  				// TODO Auto-generated catch block
  				e.printStackTrace();
  			}
  		}
  		
  		public String toSHA1(byte[] convertme) {
  			MessageDigest md = null;
  			try {
  				md = MessageDigest.getInstance("SHA-1");
  			} catch (NoSuchAlgorithmException e) {
  				e.printStackTrace();
  			}
  			byte[] buf = md.digest(convertme);
  			return Base64.encodeBytes(buf);
  		}
  	}
  
  	/**
  	 * Some HTTP response status codes
  	 */
  	public static final String HTTP_OK = "200 OK", HTTP_REDIRECT = "301 Moved Permanently", HTTP_FORBIDDEN = "403 Forbidden", HTTP_NOTFOUND = "404 Not Found", HTTP_BADREQUEST = "400 Bad Request", HTTP_INTERNALERROR = "500 Internal Server Error", HTTP_UNAUTHORIZED = "401 Authorization Required", HTTP_NOTIMPLEMENTED = "501 Not Implemented";
  
  	/**
  	 * Common mime types for dynamic content
  	 */
  	public static final String MIME_PLAINTEXT = "text/plain", MIME_HTML = "text/html", MIME_DEFAULT_BINARY = "application/octet-stream", MIME_JSON = "application/json";
  
  	// ==================================================
  	// Socket & server code
  	// ==================================================
  
  	/**
  	 * Starts a HTTP server to given port.
  	 * <p>
  	 * Throws an IOException if the socket is already in use
  	 */
  	public NanoHTTPD(int port, boolean ssl, InetAddress bindAddress) throws IOException {
  		myTcpPort = port;
  
  		if (ssl) {
  			ServerSocketFactory ssocketFactory = SSLServerSocketFactory.getDefault();
  			myServerSocket = ssocketFactory.createServerSocket(port);
  		} else {
  			if (bindAddress != null) {
  				myServerSocket = new ServerSocket(myTcpPort, /* default value */-1, bindAddress);
  			} else {
  				myServerSocket = new ServerSocket(myTcpPort);
  			}
  		}
  		myThread = new Thread(new Runnable() {
  			public void run() {
  				while (!Thread.currentThread().isInterrupted()) {
  					try {
  						Socket s = myServerSocket.accept();
  						s.setTcpNoDelay(true);
  						
  						new HTTPSession(s.getInputStream(), s.getOutputStream(), s.getInetAddress());
  					} catch (IOException ioe) {
  					}
  				}
  			}
  		});
  		myThread.setDaemon(true);
  		myThread.start();
  	}
  
  	public NanoHTTPD(int port) throws IOException {
  		this(port, false, null);
  	}
  
  	public NanoHTTPD(int port, InetAddress bindAddress) throws IOException {
  		this(port, false, bindAddress);
  	}
  
  	/**
  	 * Stops the server.
  	 */
  	public void stop() {
  		try {
  			myServerSocket.close();
  			myThread.interrupt();
  			myThread.join();
  		} catch (IOException ioe) {
  			ioe.printStackTrace();
  		} catch (InterruptedException e) {
  			e.printStackTrace();
  		}
  	}
  
  	/**
  	 * Starts as a standalone file server and waits for Enter.
  	 * 
  	 * public static void main( String[] args ) { System.out.println(
  	 * "NanoHTTPD 1.14 (C) 2001,2005-2010 Jarno Elonen\n" +
  	 * "(Command line options: [port] [--licence])\n" );
  	 * 
  	 * // Show licence if requested int lopt = -1; for ( int i=0; i<args.length;
  	 * ++i ) if ( args[i].toLowerCase().endsWith( "licence" )) { lopt = i;
  	 * System.out.println( LICENCE + "\n" ); }
  	 * 
  	 * // Change port if requested int port = 80; if ( args.length > 0 && lopt
  	 * != 0 ) port = Integer.parseInt( args[0] );
  	 * 
  	 * if ( args.length > 1 && args[1].toLowerCase().endsWith( "licence" ))
  	 * System.out.println( LICENCE + "\n" );
  	 * 
  	 * NanoHTTPD nh = null; try { nh = new NanoHTTPD( port ); } catch(
  	 * IOException ioe ) { System.err.println( "Couldn't start server:\n" + ioe
  	 * ); System.exit( -1 ); } nh.myFileDir = new File("");
  	 * 
  	 * System.out.println( "Now serving files in port " + port + " from \"" +
  	 * new File("").getAbsolutePath() + "\"" ); System.out.println(
  	 * "Hit Enter to stop.\n" );
  	 * 
  	 * try { System.in.read(); } catch( Throwable t ) {}; }
  	 * 
  	 * /** Handles one session, i.e. parses the HTTP request and returns the
  	 * response.
  	 */
  	public class HTTPSession implements Runnable {
  
  		public HTTPSession(InputStream in, OutputStream out, InetAddress addr, boolean blocking) {
  			this.in = in;
  			this.out = out;
  			this.addr = addr;
  
  			if(!blocking) {
  				Thread t = new Thread(this);
  				t.setDaemon(true);
  				t.start();
  			}
  			else {
  				run();
  			}
  		}
  		
  		public HTTPSession(InputStream in, OutputStream out, InetAddress addr) {
  			this(in, out, addr, false);
  		}
  
  		public InputStream in;
  		public OutputStream out;
  		public InetAddress addr;
  		public Lambda<Void, OutputStream> callback = null;
  		
  		public boolean closeOnCompletion = false;
  
  		public HTTPSession(InputStream in, OutputStream s, InetAddress a, Lambda<Void, OutputStream> callback, boolean blocking) {
  			this.in = in;
  			this.out = s;
  			this.addr = a;
  			this.callback = callback;
  
  			if(!blocking) {
  				Thread t = new Thread(this);
  				t.setDaemon(true);
  				t.start();
  			}
  			else {
  				run();
  			}
  		}
  		
  		public HTTPSession(InputStream in, OutputStream s, InetAddress a, Lambda<Void, OutputStream> callback) {
  			this(in, s, a, callback, false);
  		}
  
  		public void run() {
  			try {
  				final BufferedReader in = new BufferedReader(new InputStreamReader(this.in));
  
  				// Read the request line
  				String inLine = in.readLine();
  				if (inLine == null)
  					return;
  				
  				if(inLine.substring(0, 2).equalsIgnoreCase("gs")) {
  					try {
  						String streamLine = inLine;
  						do {
  							String[] reqLine = streamLine.split(" ", 2);
  							
  							if(reqLine[0].equalsIgnoreCase("gsa")) {
  								continue;
  							}
  							
  							final JSONServer jsonServer = JSONAPI.instance.getJSONServer();
  							final String[] split = reqLine[1].split("\\?", 2);
  							final OutputStream out = this.out;
  							
  							(new Thread(new Runnable() {
  								@Override
  								public void run() {
  									try {
  										NanoHTTPD.Response r = null;
  										if (split.length < 2) {
  											r = jsonServer.new Response(NanoHTTPD.HTTP_NOTFOUND, NanoHTTPD.MIME_JSON, jsonServer.returnAPIError("", "Incorrect. Socket requests are in the format PAGE?ARGUMENTS. For example, /api/subscribe?source=....").toJSONString());
  										} else {
  											Properties header2 = new Properties();
  											NanoHTTPD.decodeParms(split[1], header2);
  											Properties p = new Properties();
  											p.put("X-REMOTE-ADDR", addr.getHostAddress());
  											r = jsonServer.serve(split[0], "GET", p, header2);
  										}
  				
  										if (r.data instanceof StreamingResponse) {
  											final StreamingResponse s = (StreamingResponse) r.data;
  											String line = "";
  				
  											while ((line = s.nextLine()) != null) {
  												try {
  													out.write((line + "\r\n").getBytes(Charset.forName("UTF-8")));
  												}
  												catch (Exception e) {
  													StringWriter sw = new StringWriter();
  													PrintWriter pw = new PrintWriter(sw);
  													e.printStackTrace(pw);
  													JSONAPI.dbug("I accidently an exception: " + sw.toString());
  													break;
  												}
  											}
  											
  											out.close();
  											((StreamingResponse)r.data).close();
  										} else {
  											InputStream res = r.data;
  											if(res == null) {
  												res = new ByteArrayInputStream(r.bytes);
  											}
  											
  											SlimIOUtils.copy(res, out);
  											out.write("\r\n".getBytes(Charset.forName("UTF-8")));
  										}
  									}
  									catch(Exception e) {
  										e.printStackTrace();
  									}
  								}
  							})).start();
  						} while ((streamLine = in.readLine()) != null);
  					}
  					catch(Exception e) {
  						e.printStackTrace();
  					}
  					return;
  				}
  				
  				StringTokenizer st = new StringTokenizer(inLine);
  				if (!st.hasMoreTokens())
  					sendError(HTTP_BADREQUEST, "BAD REQUEST: Syntax error. Usage: GET /example/file.html");
  
  				String method = st.nextToken();
  
  				if (!st.hasMoreTokens())
  					sendError(HTTP_BADREQUEST, "BAD REQUEST: Missing URI. Usage: GET /example/file.html");
  
  				String uri = st.nextToken();
  
  				// Decode parameters from the URI
  				Properties parms = new Properties();
  				int qmi = uri.indexOf('?');
  				if (qmi >= 0) {
  					decodeParms(uri.substring(qmi + 1), parms);
  					uri = decodePercent(uri.substring(0, qmi));
  				} else
  					uri = decodePercent(uri);
  
  				Properties header = new Properties();
  				header.put("X-REMOTE-ADDR", addr.getHostAddress());
  				
  				// If there's another token, it's protocol version,
  				// followed by HTTP headers. Ignore version but parse headers.
  				// NOTE: this now forces header names uppercase since they are
  				// case insensitive and vary by client.
  				if (st.hasMoreTokens()) {
  					String line = in.readLine();
  					while (line != null && line.trim().length() > 0) {
  						int p = line.indexOf(':');
  						header.put(line.substring(0, p < 0 ? 0 : p).trim().toLowerCase(), line.substring(p + 1).trim());
  						line = in.readLine();
  					}
  				}
  				
  				// If the method is POST, there may be parameters
  				// in data section, too, read it:
  				if (method.equalsIgnoreCase("POST")) {
  					long size = 0x7FFFFFFFFFFFFFFFl;
  					String contentLength = header.getProperty("content-length");
  					if (contentLength != null) {
  						try {
  							size = Integer.parseInt(contentLength);
  						} catch (NumberFormatException ex) {
  						}
  					}
  					StringBuffer postLine = new StringBuffer();
  					char buf[] = new char[512];
  					int read = in.read(buf);
  
  					String contentType = header.getProperty("content-type");
  					if (contentType != null && !contentType.equals("x-www-form-urlencoded")) {
  						parms = new Properties();
  
  						while (read >= 0 && size > 0) {
  							size -= read;
  							postLine.append(String.valueOf(buf, 0, read));
  							if (size > 0)
  								read = in.read(buf);
  						}
  
  						parms.put("json", postLine);
  					} else {
  						while (read >= 0 && size > 0 && !postLine.toString().endsWith("\r\n")) {
  							size -= read;
  							postLine.append(String.valueOf(buf, 0, read));
  							if (size > 0)
  								read = in.read(buf);
  						}
  						decodeParms(postLine.toString().trim(), parms);
  					}
  				}
  
  				// Ok, now do the serve()
  				Response r = serve(uri, method, header, parms);
  				if (r == null)
  					sendError(HTTP_INTERNALERROR, "SERVER INTERNAL ERROR: Serve() returned a null response.");
  				else {
  					if (r instanceof WebSocketResponse) {
  						// write out the upgrade header
  						out.write(String.format("HTTP/1.1 %s\r\n", r.status).getBytes(Charset.forName("UTF-8")));
  						Enumeration<?> e = r.header.propertyNames();
  
  						while (e.hasMoreElements()) {
  							String key = e.nextElement().toString();
  							out.write(String.format("%s: %s\r\n", key, r.header.get(key)).getBytes(Charset.forName("UTF-8")));
  						}
  						out.write("\r\n".getBytes(Charset.forName("UTF-8")));
  						out.flush();
  						
  						// proxy to the websocket server via a websocket client
  						// ouch.
  						
  						JSONTunneledWebSocket ws = new JSONTunneledWebSocket(this.in, out);
  						ws.start();
  					} else {
  						sendResponse(r.status, r.mimeType, r.header, r.data, r.bytes);
  					}
  				}
  
  				in.close();
  				
  				if(callback != null) {
  					callback.execute(this.out);
  				}
  			} catch (IOException ioe) {
  				try {
  					sendError(HTTP_INTERNALERROR, "SERVER INTERNAL ERROR: IOException: " + ioe.getMessage());
  				} catch (Throwable t) {
  				}
  			} catch (InterruptedException ie) {
  				
  				// Thrown by sendError, ignore and exit the thread.
  			}
  		}
  
  		/**
  		 * Decodes the percent encoding scheme. <br/>
  		 * For example: "an+example%20string" -> "an example string"
  		 */
  		public String decodePercent(String str) throws InterruptedException {
  			try {
  				return URLDecoder.decode(str.replace("+", "%2B"), "UTF-8").replace("%2B", "+");
  			} catch (Exception e) {
  				sendError(HTTP_BADREQUEST, "BAD REQUEST: Bad percent-encoding.");
  				return null;
  			}
  		}
  
  		/**
  		 * Decodes parameters in percent-encoded URI-format ( e.g.
  		 * "name=Jack%20Daniels&pass=Single%20Malt" ) and adds them to given
  		 * Properties. NOTE: this doesn't support multiple identical keys due to
  		 * the simplicity of Properties -- if you need multiples, you might want
  		 * to replace the Properties with a Hastable of Vectors or such.
  		 */
  		public void decodeParms(String parms, Properties p) throws InterruptedException {
  			if (parms == null)
  				return;
  
  			StringTokenizer st = new StringTokenizer(parms, "&");
  			while (st.hasMoreTokens()) {
  				String e = st.nextToken();
  				int sep = e.indexOf('=');
  				if (sep >= 0)
  					p.put(decodePercent(e.substring(0, sep)).trim(), decodePercent(e.substring(sep + 1)));
  			}
  		}
  
  		/**
  		 * Returns an error message as a HTTP response and throws
  		 * InterruptedException to stop furhter request processing.
  		 */
  		private void sendError(String status, String msg) throws InterruptedException {
  			sendResponse(status, MIME_PLAINTEXT, null, null, msg.getBytes());
  			throw new InterruptedException();
  		}
  
  		/**
  		 * Sends given response to the socket.
  		 */
  		private void sendResponse(String status, String mime, Properties header, InputStream data, byte[] bytes) {
  			try {
  				if (status == null)
  					throw new Error("sendResponse(): Status can't be null.");
  
  				PrintWriter pw = new PrintWriter(out);
  				pw.print("HTTP/1.1 " + status + " \r\n");
  
  				if (mime != null)
  					pw.print("Content-Type: " + mime + "\r\n");
  
  				if (header == null || header.getProperty("Date") == null)
  					pw.print("Date: " + gmtFrmt.format(new Date()) + "\r\n");
  
  				if (header != null) {
  					Enumeration<Object> e = header.keys();
  					while (e.hasMoreElements()) {
  						String key = (String) e.nextElement();
  						String value = header.getProperty(key);
  						pw.print(key + ": " + value + "\r\n");
  					}
  				}
  
  				pw.print("\r\n");
  				pw.flush();
  
  				if (data instanceof StreamingResponse) {
  					final StreamingResponse s = (StreamingResponse) data;
  					String line = "";
  
  					boolean doContinue = true;
  					while (doContinue && (line = s.nextLine()) != null) {
  						try {
  							out.write((line.trim() + "\r\n").getBytes("UTF-8"));
  						} catch (IOException e) {
  							doContinue = false;
  							out.close();
  							if (data != null) {
  								data.close();
  							}
  						}
  					}
  				} else if (data != null) {
  					SlimIOUtils.copy(data, out);
  					out.flush();
  				} else if (bytes != null) {
  					out.write(bytes);
  					out.flush();
  				}
  				// out.flush();
  				out.close();
  				if (data != null)
  					data.close();
  			} catch (IOException ioe) {
  				try {
  					in.close();
  					out.close();
  				} catch (IOException e) {
  					// TODO Auto-generated catch block
  					e.printStackTrace();
  				}
  			}
  		}
  	};
  
  	/**
  	 * URL-encodes everything between "/"-characters. Encodes spaces as '%20'
  	 * instead of '+'.
  	 */
  	private String encodeUri(String uri) {
  		StringBuffer newUri = new StringBuffer();
  		StringTokenizer st = new StringTokenizer(uri, "/ ", true);
  		while (st.hasMoreTokens()) {
  			String tok = st.nextToken();
  			if (tok.equals("/"))
  				newUri.append("/");
  			else if (tok.equals(" "))
  				newUri.append("%20");
  			else {
  				// newUri += URLEncoder.encode( tok );
  				// For Java 1.4 you'll want to use this instead:
  				try {
  					newUri.append(URLEncoder.encode(tok, "UTF-8"));
  				} catch (UnsupportedEncodingException uee) {
  					uee.printStackTrace();
  				}
  				;
  			}
  		}
  		return newUri.toString();
  	}
  
  	private int myTcpPort;
  	private final ServerSocket myServerSocket;
  	private Thread myThread;
  
  	File myFileDir;
  
  	// ==================================================
  	// File server code
  	// ==================================================
  
  	/**
  	 * Serves file from homeDir and its' subdirectories (only). Uses only URI,
  	 * ignores all headers and HTTP parameters.
  	 */
  	public Response serveFile(String uri, Properties header, File homeDir, boolean allowDirectoryListing) {
  		// Make sure we won't die of an exception later
  		if (!homeDir.isDirectory())
  			return new Response(HTTP_INTERNALERROR, MIME_PLAINTEXT, "INTERNAL ERRROR: serveFile(): given homeDir is not a directory.");
  
  		// Remove URL arguments
  		uri = uri.trim().replace(File.separatorChar, '/');
  		if (uri.indexOf('?') >= 0)
  			uri = uri.substring(0, uri.indexOf('?'));
  
  		// Prohibit getting out of current directory
  		if (uri.startsWith("..") || uri.endsWith("..") || uri.indexOf("../") >= 0)
  			return new Response(HTTP_FORBIDDEN, MIME_PLAINTEXT, "FORBIDDEN: Won't serve ../ for security reasons.");
  
  		File f = new File(homeDir, uri);
  		if (!f.exists())
  			return new Response(HTTP_NOTFOUND, MIME_PLAINTEXT, "Error 404, file not found.");
  
  		// List the directory, if necessary
  		if (f.isDirectory()) {
  			// Browsers get confused without '/' after the
  			// directory, send a redirect.
  			if (!uri.endsWith("/")) {
  				uri += "/";
  				Response r = new Response(HTTP_REDIRECT, MIME_HTML, "<html><body>Redirected: <a href=\"" + uri + "\">" + uri + "</a></body></html>");
  				r.addHeader("Location", uri);
  				return r;
  			}
  
  			// First try index.html and index.htm
  			if (new File(f, "index.html").exists())
  				f = new File(homeDir, uri + "/index.html");
  			else if (new File(f, "index.htm").exists())
  				f = new File(homeDir, uri + "/index.htm");
  
  			// No index file, list the directory
  			else if (allowDirectoryListing) {
  				String[] files = f.list();
  				String msg = "<html><body><h1>Directory " + uri + "</h1><br/>";
  
  				if (uri.length() > 1) {
  					String u = uri.substring(0, uri.length() - 1);
  					int slash = u.lastIndexOf('/');
  					if (slash >= 0 && slash < u.length())
  						msg += "<b><a href=\"" + uri.substring(0, slash + 1) + "\">..</a></b><br/>";
  				}
  
  				for (int i = 0; i < files.length; ++i) {
  					File curFile = new File(f, files[i]);
  					boolean dir = curFile.isDirectory();
  					if (dir) {
  						msg += "<b>";
  						files[i] += "/";
  					}
  
  					msg += "<a href=\"" + encodeUri(uri + files[i]) + "\">" + files[i] + "</a>";
  
  					// Show file size
  					if (curFile.isFile()) {
  						long len = curFile.length();
  						msg += " &nbsp;<font size=2>(";
  						if (len < 1024)
  							msg += curFile.length() + " bytes";
  						else if (len < 1024 * 1024)
  							msg += curFile.length() / 1024 + "." + (curFile.length() % 1024 / 10 % 100) + " KB";
  						else
  							msg += curFile.length() / (1024 * 1024) + "." + curFile.length() % (1024 * 1024) / 10 % 100 + " MB";
  
  						msg += ")</font>";
  					}
  					msg += "<br/>";
  					if (dir)
  						msg += "</b>";
  				}
  				return new Response(HTTP_OK, MIME_HTML, msg);
  			} else {
  				return new Response(HTTP_FORBIDDEN, MIME_PLAINTEXT, "FORBIDDEN: No directory listing.");
  			}
  		}
  
  		try {
  			// Get MIME type from file name extension, if possible
  			String mime = null;
  			int dot = f.getCanonicalPath().lastIndexOf('.');
  			if (dot >= 0)
  				mime = (String) theMimeTypes.get(f.getCanonicalPath().substring(dot + 1).toLowerCase());
  			if (mime == null)
  				mime = MIME_DEFAULT_BINARY;
  
  			// Support (simple) skipping:
  			long startFrom = 0;
  			String range = header.getProperty("range");
  			if (range != null) {
  				if (range.startsWith("bytes=")) {
  					range = range.substring("bytes=".length());
  					int minus = range.indexOf('-');
  					if (minus > 0)
  						range = range.substring(0, minus);
  					try {
  						startFrom = Long.parseLong(range);
  					} catch (NumberFormatException nfe) {
  					}
  				}
  			}
  
  			FileInputStream fis = new FileInputStream(f);
  			fis.skip(startFrom);
  			Response r = new Response(HTTP_OK, mime, fis);
  			r.addHeader("Content-length", "" + (f.length() - startFrom));
  			r.addHeader("Content-range", "" + startFrom + "-" + (f.length() - 1) + "/" + f.length());
  			return r;
  		} catch (IOException ioe) {
  			return new Response(HTTP_FORBIDDEN, MIME_PLAINTEXT, "FORBIDDEN: Reading file failed.");
  		}
  	}
  
  	/**
  	 * Hashtable mapping (String)FILENAME_EXTENSION -> (String)MIME_TYPE
  	 */
  	private static Hashtable<String, String> theMimeTypes = new Hashtable<String, String>();
  	static {
  		StringTokenizer st = new StringTokenizer("htm		text/html " + "html		text/html " + "txt		text/plain " + "asc		text/plain " + "gif		image/gif " + "jpg		image/jpeg " + "jpeg		image/jpeg " + "png		image/png " + "mp3		audio/mpeg " + "m3u		audio/mpeg-url " + "pdf		application/pdf " + "json		application/json " + "doc		application/msword " + "ogg		application/x-ogg " + "zip		application/octet-stream " + "exe		application/octet-stream " + "class		application/octet-stream ");
  		while (st.hasMoreTokens())
  			theMimeTypes.put(st.nextToken(), st.nextToken());
  	}
  
  	/**
  	 * GMT date formatter
  	 */
  	private static java.text.SimpleDateFormat gmtFrmt;
  	static {
  		gmtFrmt = new java.text.SimpleDateFormat("E, d MMM yyyy HH:mm:ss 'GMT'", Locale.US);
  		gmtFrmt.setTimeZone(TimeZone.getTimeZone("GMT"));
  	}
  
  	/**
  	 * The distribution licence
  	 */
  	@SuppressWarnings("unused")
  	private static final String LICENCE = "Copyright (C) 2001,2005-2010 by Jarno Elonen <elonen@iki.fi>\n" + "\n" + "Redistribution and use in source and binary forms, with or without\n" + "modification, are permitted provided that the following conditions\n" + "are met:\n" + "\n" + "Redistributions of source code must retain the above copyright notice,\n" + "this list of conditions and the following disclaimer. Redistributions in\n" + "binary form must reproduce the above copyright notice, this list of\n" + "conditions and the following disclaimer in the documentation and/or other\n" + "materials provided with the distribution. The name of the author may not\n" + "be used to endorse or promote products derived from this software without\n" + "specific prior written permission. \n" + " \n" + "THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR\n" + "IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES\n" + "OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.\n" + "IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,\n" + "INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT\n" + "NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,\n" + "DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY\n" + "THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\n" + "(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE\n" + "OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.";
  }