迷你开源单文件Java HTTP 服务器---NanoHTTPD.java
package positron.harness;
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.UnsupportedEncodingException;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.URLEncoder;
import java.util.Date;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Locale;
import java.util.Map;
import java.util.Properties;
import java.util.StringTokenizer;
import java.util.TimeZone;
/**
* A simple, tiny, nicely embeddable HTTP 1.0 server in Java
*
* This class has been trivially modified from its original form, taken from
* http://elonen.iki.fi/code/nanohttpd/NanoHTTPD.java
*
* <p> NanoHTTPD version 1.1,
* Copyright © 2001,2005-2007 Jarno Elonen ([email protected], 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
{
// ==================================================
// 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 .data = new ByteArrayInputStream( txt.getBytes());
}
/**
* 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();
}
/**
* 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_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 " ;
// ==================================================
// 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 ) throws IOException
{
myTcpPort = port;
final ServerSocket ss = new ServerSocket( myTcpPort );
Thread t = new Thread( new Runnable()
{
public void run()
{
try
{
while ( true )
new HTTPSession( ss.accept());
}
catch ( IOException ioe )
{}
}
});
t.setDaemon( true );
t.start();
}
/**
* Starts as a standalone file server and waits for Enter.
*/
public static void main( String[] args )
{
System.out.println( " NanoHTTPD 1.1 (C) 2001,2005-2007 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 " );
try {
new NanoHTTPD( port );
} 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
{
InputStream is = mySocket.getInputStream();
if ( is == null ) return ;
BufferedReader in = new BufferedReader( new InputStreamReader( is ));
// Read the request line
StringTokenizer st = new StringTokenizer( in.readLine());
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 = 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.
// NOTE: this now forces header names uppercase since they are
// case insensitive and vary by client.
Properties header = new Properties();
if ( st.hasMoreTokens())
{
String line = in.readLine();
while ( line.trim().length() > 0 )
{
int p = line.indexOf( ' : ' );
header.put( line.substring( 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) {}
}
String postLine = "" ;
char buf[] = new char [ 512 ];
int read = in.read(buf);
while ( read >= 0 && size > 0 && ! postLine.endsWith( " /r/n " ) )
{
size -= read;
postLine += String.valueOf(buf, 0 , read);
if ( size > 0 )
read = in.read(buf);
}
postLine = postLine.trim();
decodeParms( postLine, 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
sendResponse( r.status, r.mimeType, r.header, r.data );
in.close();
}
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"
*/
private String decodePercent( String str ) throws InterruptedException
{
try
{
StringBuffer sb = new StringBuffer();
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( 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 ];
while ( true )
{
int read = data.read( buff, 0 , 2048 );
if (read <= 0 )
break ;
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;
};
/**
* 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
{
try { newUri += URLEncoder.encode( tok, " UTF-8 " ); } catch ( UnsupportedEncodingException uee ) {}
}
}
return newUri;
}
private int myTcpPort;
// ==================================================
// 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 += " <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. " );
}
}
/**
* Map (String)FILENAME_EXTENSION -> (String)MIME_TYPE
*/
private static Map < String, String > theMimeTypes = new HashMap < 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 " +
" 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 license
*/
private static final String LICENCE =
" Copyright (C) 2001,2005 by Jarno Elonen <[email protected]>/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. " ;
}