package de.tu_dresden.inf.ggp06_2.connection;
import java.io.*;
import java.util.*;
import java.net.*;
/**
* A simple, tiny, nicely embeddable HTTP 1.0 server in Java
* <p>
* NanoHTTPD version 1.01, Copyright © 2001 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>
* </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)
*/
@SuppressWarnings("unchecked")
public class NanoHTTPD {
// ==================================================
// API parts
// ==================================================
/**
* Override this to customize the server.
* <p>
* (By default, this delegates to serveFile() and allows directory listing.)
*
* @param uri
* Percent-decoded URI without parameters, for example
* "/index.cgi"
* @param method
* "GET", "POST" etc.
* @param parms
* Parsed, percent decoded parameters from URI and, in case of
* POST, data.
* @param header
* Header entries, percent decoded
* @return HTTP response, see class Response for details
*/
public Response serve(String uri, String method, Properties header,
Properties parms, String data) {
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 );
}
/**
* Common mime types for dynamic content
*/
public static final String MIME_PLAINTEXT = "text/plain",
MIME_HTML = "text/html",
MIME_DEFAULT_BINARY = "application/octet-stream";
// ==================================================
// Socket & server code
// ==================================================
protected Thread server_thread;
/**
* Starts a HTTP server to given port.
* <p>
* Throws an IOException if the socket is already in use
*/
public NanoHTTPD(int port) throws IOException {
myTcpPort = port;
final ServerSocket ss = new ServerSocket( myTcpPort );
server_thread = new Thread( new Runnable() {
public void run() {
try {
while ( true )
new HTTPSession( ss.accept() );
}
catch ( IOException ioe ) {
ioe.printStackTrace();
}
}
} );
server_thread.setDaemon( true );
server_thread.start();
System.out.println( "NanoHTTPD is listening on port " + port );
}
/**
* Starts as a standalone file server and waits for Enter.
*/
public static void main(String[] args) {
System.out.println( "NanoHTTPD 1.0 (c) 2001 Jarno Elonen\n"
+ "(Command line options: [port] [--licence])\n" );
// Show license 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 );
nh.myFileDir = new File( "" );
}
catch ( IOException ioe ) {
System.err.println( "Couldn't start server:\n" + ioe );
System.exit( -1 );
}
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.
*/
private class HTTPSession implements Runnable {
public HTTPSession(Socket s) {
mySocket = s;
Thread t = new Thread( this );
t.setDaemon( true );
t.start();
}
public void run() {
try {
String line;
InputStream is = mySocket.getInputStream();
if ( is == null )
return;
BufferedReader in = new BufferedReader( new InputStreamReader(
is ) );
// Read the request line
line = in.readLine();
if ( line != null ) {
// System.out.println("got line:" + line);
StringTokenizer st = new StringTokenizer( line );
if ( !st.hasMoreTokens() )
sendError( Response.HTTP_BADREQUEST,
"BAD REQUEST: Syntax error. Usage: GET /example/file.html" );
String method = st.nextToken();
if ( !st.hasMoreTokens() )
sendError( Response.HTTP_BADREQUEST,
"BAD REQUEST: Missing URI. Usage: GET /example/file.html" );
String uri = decodePercent( 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 ) );
}
// If there's another token, it's protocol version,
// followed by HTTP headers. Ignore version but parse
// headers.
Properties header = new Properties();
if ( st.hasMoreTokens() ) {
line = in.readLine();
while ( line != null && line.trim().length() > 0 ) {
int p = line.indexOf( ':' );
header.put( line.substring( 0, p ).trim(), line
.substring( p + 1 ).trim() );
line = in.readLine();
}
}
char[] cbuf = new char[1024];
String data = null;
int length = 0;
int length_so_far = 0;
int len;
// If the method is POST, there may be parameters
// in data section, too, read another line:
if ( method.equalsIgnoreCase( "POST" ) ) {
try {
// BUG: Some headers contain Content-length
// some Content-Length
length = Integer.parseInt( header
.getProperty( "Content-length" ) );
} catch ( NumberFormatException ex ) {}
while ( length_so_far < length &&
( len = in.read( cbuf, 0, 1023 ) ) != -1 ) {
line = new String( cbuf, 0, len );
if ( data == null )
data = line;
else
data += line;
length_so_far += len;
}
}
// System.out.println( "data length " + length_so_far + " of "
// + length );
Response r = serve( uri, method, header, parms, data );
if ( r == null )
sendError( Response.HTTP_INTERNALERROR,
"SERVER INTERNAL ERROR: Serve() returned a null response." );
else
sendResponse( r.status, r.mimeType, r.header, r.data );
in.close();
}
}
catch ( IOException ioe ) {
try {
sendError( Response.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"
*/
private String decodePercent(String str) throws InterruptedException {
try {
StringBuilder sb = new StringBuilder();
for ( int i = 0; i < str.length(); i++ ) {
char c = str.charAt( i );
switch ( c ) {
case '+':
sb.append( ' ' );
break;
case '%':
sb.append( (char) Integer.parseInt( str.substring(
i + 1, i + 3 ), 16 ) );
i += 2;
break;
default:
sb.append( c );
break;
}
}
return new String( sb.toString().getBytes() );
}
catch ( Exception e ) {
sendError( Response.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.
*/
private 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,
new ByteArrayInputStream( msg.getBytes() ) );
throw new InterruptedException();
}
/**
* Sends given response to the socket.
*/
private void sendResponse(String status, String mime,
Properties header, InputStream data) {
try {
if ( status == null )
throw new Error( "sendResponse(): Status can't be null." );
OutputStream out = mySocket.getOutputStream();
PrintWriter pw = new PrintWriter( out );
pw.print( "HTTP/1.0 " + 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 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 != null ) {
byte[] buff = new byte[2048];
int read = 2048;
while ( read == 2048 ) {
read = data.read( buff, 0, 2048 );
if ( read > 0 )
out.write( buff, 0, read );
}
}
out.flush();
out.close();
if ( data != null )
data.close();
}
catch ( IOException ioe ) {
// Couldn't write? No can do.
try {
mySocket.close();
}
catch ( Throwable t ) {}
}
}
private Socket mySocket;
@SuppressWarnings("unused")
private BufferedReader myIn;
}
/**
* URL-encodes everything between "/"-characters. Encodes spaces as '%20'
* instead of '+'.
*/
private String encodeUri(String uri) {
String newUri = "";
StringTokenizer st = new StringTokenizer( uri, "/ ", true );
while ( st.hasMoreTokens() ) {
String tok = st.nextToken();
if ( tok.equals( "/" ) )
newUri += "/";
else if ( tok.equals( " " ) )
newUri += "%20";
else
// changes because of deprecated API
try {
newUri += URLEncoder.encode( tok, "UTF-8" );
}
catch ( java.io.UnsupportedEncodingException ex ) {
ex.printStackTrace();
}
}
return newUri;
}
private int myTcpPort;
@SuppressWarnings("unused")
private 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( 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( Response.HTTP_FORBIDDEN, MIME_PLAINTEXT,
"FORBIDDEN: Won't serve ../ for security reasons." );
File f = new File( homeDir, uri );
if ( !f.exists() )
return new Response( 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( 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 += " <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( Response.HTTP_OK, MIME_HTML, msg );
} else {
return new Response( Response.HTTP_FORBIDDEN, MIME_PLAINTEXT,
"FORBIDDEN: No directory listing." );
}
}
// Get MIME type from file name extension, if possible
String mime = null;
int dot = uri.lastIndexOf( '.' );
if ( dot >= 0 )
mime = (String) theMimeTypes.get( uri.substring( dot + 1 )
.toLowerCase() );
if ( mime == null )
mime = MIME_DEFAULT_BINARY;
try {
// 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( 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( Response.HTTP_FORBIDDEN, MIME_PLAINTEXT,
"FORBIDDEN: Reading file failed." );
}
}
/**
* Hashtable mapping (String)FILENAME_EXTENSION -> (String)MIME_TYPE
*/
private static Hashtable theMimeTypes = new Hashtable();
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 "
+ "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
*/
private static final String LICENCE = "Copyright (c) 2001 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.";
}