jhttptunnelserver.java

可以在cmwap上用socket的代码,cmwap是只能用http协议的,但这个可以帮你实现socket来连接.

/* -*-mode:java; c-basic-offset:2; -*- */
/*
Copyright (c) 2004 ymnk, JCraft,Inc. All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

  1. Redistributions of source code must retain the above copyright notice,
     this list of conditions and the following disclaimer.

  2. Redistributions in binary form must reproduce the above copyright 
     notice, this list of conditions and the following disclaimer in 
     the documentation and/or other materials provided with the distribution.

  3. The names of the authors may not be used to endorse or promote products
     derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JCRAFT,
INC. OR ANY CONTRIBUTORS TO THIS SOFTWARE BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

package com.jcraft.jhttptunnel;
import java.lang.*;
import java.io.*;
import java.net.*;
import java.util.*;

public class JHttpTunnelServer extends Thread{

  static int connections=0;
  static int client_connections=0;
  static int source_connections=0;

  private ServerSocket serverSocket=null;
  static int port=8888;
  static String myaddress=null;
  static String myURL=null;

  static String default_host;
  static int default_port;

  JHttpTunnelServer(int port){
    super();
    connections=0;
    try{ serverSocket=new ServerSocket(port); }
    catch(IOException e){
      //System.out.println("ServerSocket error"+e );
      System.exit(1);
    }
    try{
      if(myaddress==null)
        myURL="http://"+InetAddress.getLocalHost().getHostAddress()+":"+port;
      else
        myURL="http://"+myaddress+":"+port;
      //System.out.println("myURL: "+myURL);
    }
    catch(Exception e){
      System.out.println(e );
    }
  }
  JHttpTunnelServer(int lport, String fhost, int fport){
    this(lport);
    this.default_host=fhost;
    this.default_port=fport;
  }

  public void run(){
    Socket socket=null;
    while(true){
      try{socket=serverSocket.accept();}
      catch(IOException e) {
	System.out.println("accept error");
	System.exit(1);
      }
      connections++;
      //new Spawn(socket);
      final Socket _socket=socket;
      new Thread(new Runnable(){
	public void run(){
	  try{(new Dispatch(_socket)).doit();}
	  catch(Exception e){}
	}
	}).start();
    }
  }

  /*
  class Spawn extends Thread{
    private Socket socket=null;
    Spawn(Socket socket){
      super();
      this.socket=socket;
      start();
    }
    public void run(){
      try{(new Dispatch(socket)).doit();}
      catch(Exception e){}
    }
  }
  */

  public static void main(String[] arg){

    int port=8888;
    if(arg.length!=0){
      String _port=arg[0];
      if(_port!=null){
	port=Integer.parseInt(_port);
      }
    }

    String fhost=null;
    int fport=0;
    String _fw=System.getProperty("F");
    if(_fw!=null && _fw.indexOf(':')!=-1){
      fport=Integer.parseInt(_fw.substring(_fw.lastIndexOf(':') + 1));
      fhost=_fw.substring(0, _fw.lastIndexOf(':'));
    }
    if(fport==0 || fhost==null){
      System.err.println("forward-port is not given");
      System.exit(1);
    }
    (new JHttpTunnelServer(port, fhost, fport)).start();
  }
}
 
class Dispatch{
  private MySocket mySocket=null;
  private String rootDirectory=".";
  private String defaultFile="index.html";

  Dispatch(Socket s) throws IOException{
    super();
    mySocket=new MySocket(s);
  }

  private Vector getHttpHeader(MySocket ms) throws IOException{
    Vector v=new Vector();
    String foo=null;
    while(true){
      foo=ms.readLine();
      if(foo.length()==0){ break; }
      v.addElement(foo);
    }
    return v;
  }

  byte[] buf=new byte[1024];

  private void procPOST(String string, Vector httpheader) throws IOException{
    String foo;
    int	len=0;
    int	c;
    String file=string.substring(string.indexOf(' ') + 1);
    if(file.indexOf(' ')!=-1)
      file=file.substring(0 , file.indexOf(' '));

    Hashtable vars=getVars((file.indexOf('?')!=-1)? 
			   file.substring(file.indexOf('?')+1):null);
    String sid=(String)vars.get("SESSIONID");

    Client client=null; 
    if(sid==null){
      sid=new Long(System.currentTimeMillis()).toString();
      client=new Client(sid, 
			JHttpTunnelServer.default_host,
			JHttpTunnelServer.default_port);
    }
    else{
      client=getClient(sid);
    }

    //System.out.println("client: "+client);

    if(client==null){
      notFound(mySocket);
      return;
    }

    for(int i=0; i<httpheader.size(); i++){
      foo=(String)httpheader.elementAt(i);
      if(foo.startsWith("Content-Length:") ||
	 foo.startsWith("Content-length:")  // hmm... for Opera, lynx
	 ){
	foo=foo.substring(foo.indexOf(' ')+1);
	foo=foo.trim();
	len=Integer.parseInt(foo);
      }
    }

    //System.out.println("len: "+len);

    if(len==0){   // just read data
      client.command=-1;
      client.dataremain=0;
    }

    if(client.dataremain==0 && len>0){
      int i=mySocket.read(buf, 0, 1);  // command
      len--;
      client.command=buf[0];
      int datalen=0;

      if((client.command&JHttpTunnel.TUNNEL_SIMPLE)==0){
	i=mySocket.read(buf, 0, 2);
	len-=2;
	if(i!=2){
	}
	datalen=(((buf[0])<<8)&0xff00);
	datalen=datalen|(buf[1]&0xff);
      }
//System.out.println("command: "+client.command+" "+datalen);
      client.dataremain=datalen;
    }

//System.out.println("dataremain: "+client.dataremain+" len="+len);

    int i=0;
    if(len>0){
      i=mySocket.read(buf, 0, len);
//System.out.println("["+new String(buf, 0, i)+"]");
      client.dataremain-=len;
    }

    if(client.dataremain==0){
System.out.println(sid+": "+client.command);
      switch(client.command){
        case JHttpTunnel.TUNNEL_OPEN:
	  client.connect();
	  break;
        case JHttpTunnel.TUNNEL_DATA:
	  client.send(buf, 0, len);
	  break;
        case JHttpTunnel.TUNNEL_CLOSE:
	  client.close();
	  break;
      }
    }

    i=0;
    if(client.isConnected()){
      i=client.pop(buf, 3, buf.length-3);
      if(i>0){
	buf[0]=JHttpTunnel.TUNNEL_DATA;
	buf[1]=(byte)((i>>>8)&0xff);
	buf[2]=(byte)(i&0xff);
	i+=3;
      }
    }
    ok(mySocket, buf, 0, i, sid);
  }

  private void procGET(String string, Vector httpheader) throws IOException{
    String foo;
    int	c;
    String file=string.substring(string.indexOf(' ') + 1);
    if(file.indexOf(' ')!=-1)
      file=file.substring(0 , file.indexOf(' '));

    if(file.indexOf("..")!=-1){
      notFound(mySocket);
      return;
    }

    if(file.startsWith("/"))
      file=file.substring(1);

    try {
      File _file=new File(file);
      int len=(int)_file.length();
      FileInputStream fis=new FileInputStream(file);
      ok(mySocket, fis, len, null);
      fis.close();
    }
    catch(IOException e){
      System.out.println(e);
    }


  }

  private void procHEAD(String string, Vector httpheader) throws IOException{
    ok(mySocket, null, 0, 0, "");
  }

  String decode(String arg){
    byte[] foo=arg.getBytes();
    StringBuffer sb=new StringBuffer();
    for(int i=0; i<foo.length; i++){
      if(foo[i]=='+'){ sb.append((char)' '); continue; }
      if(foo[i]=='%' && i+2<foo.length){
        int bar=foo[i+1];
        bar=('0'<=bar && bar<='9')? bar-'0' :
	  ('a'<=bar && bar<='z')? bar-'a'+10 :
	  ('A'<=bar && bar<='Z')? bar-'A'+10 : bar;
        bar*=16;
        int goo=foo[i+2];
        goo=('0'<=goo && goo<='9')? goo-'0' :
	  ('a'<=goo && goo<='f')? goo-'a'+10 :
	  ('A'<=goo && goo<='F')? goo-'A'+10 : goo;
        bar+=goo; bar&=0xff;
        sb.append((char)bar);
        i+=2;
        continue;
      }
      sb.append((char)foo[i]);
    }
    return sb.toString();
  }

  Hashtable getVars(String arg){
    Hashtable vars=new Hashtable();
    if(arg==null) return vars;
    arg=decode(arg);
    int foo=0;
    int i=0;
    int c=0;
    String key, value;
    while(true){
      key=value=null;
      foo=arg.indexOf('=');
      if(foo==-1)break;
      key=arg.substring(0, foo);
      arg=arg.substring(foo+1);
      foo=arg.indexOf('&');
      if(foo!=-1){
        value=arg.substring(0, foo);
        arg=arg.substring(foo+1);
      }
      else value=arg;
      vars.put(key, value);
      if(foo==-1)break;
    }
    return vars;
  }

  public void doit(){
    try{
      String foo=mySocket.readLine();

System.out.println(mySocket.socket.getInetAddress()+": "+foo+" "+(new java.util.Date()));

      if(foo.indexOf(' ')==-1){
        mySocket.close();
        return;
      }

      String bar=foo.substring(0, foo.indexOf(' '));
      //System.out.println(foo);

      Vector v=getHttpHeader(mySocket);

//System.out.println(v);

      if(bar.equalsIgnoreCase("POST")){
        procPOST(foo, v);
        return;
      }

      if(bar.equalsIgnoreCase("GET")){
        procGET(foo, v);
        return;
      }

      if(bar.equalsIgnoreCase("HEAD")){
        procHEAD(foo, v);
        return;
      }
    }
    catch(Exception e){
    }
  }

  void ok(MySocket mysocket, byte[] buf, int s, int l, String sid) throws IOException{
    mysocket.println("HTTP/1.1 200 OK");
    mysocket.println("Last-Modified: Thu, 04 Oct 2001 14:09:23 GMT");
    if(sid!=null){
      mysocket.println("x-SESSIONID: "+sid);
    }
    mysocket.println("Content-Length: "+l);
    mysocket.println("Connection: close");
    mysocket.println("Content-Type: text/html; charset=iso-8859-1");          
    mysocket.println("");

    if(l>0){
      mysocket.write(buf, s, l);
    }

    mysocket.flush();
    mysocket.close();
  }

  void ok(MySocket mysocket, InputStream in, int l, String sid) throws IOException{
    mysocket.println("HTTP/1.1 200 OK");
    mysocket.println("Last-Modified: Thu, 04 Oct 2001 14:09:23 GMT");
    if(sid!=null){
      mysocket.println("x-SESSIONID: "+sid);
    }
    mysocket.println("Content-Length: "+l);
    mysocket.println("Connection: close");
    mysocket.println("Content-Type: text/html; charset=iso-8859-1");          
    mysocket.println("");

    if(l>0){
      byte[] buf=new byte[1024];
      while(true){
	int i=in.read(buf, 0, buf.length);
	if(i<0) break;
	if(i>0){
	  mysocket.write(buf, 0, i);
	}
      }
    }
    mysocket.flush();
    mysocket.close();
  }


  static void notFound(MySocket ms) throws IOException{
    ms.println("HTTP/1.1 404 Not Found") ;
    ms.println("Content-Type: text/html") ;
    ms.println("Content-Length: 0");
    ms.println("Connection: close");
    ms.println("") ;
    ms.flush();
    ms.close();
  }

  private static Hashtable cpool=new Hashtable();
  static Client getClient(String sid){ return (Client)cpool.get(sid); }
  static void putClient(String sid, Client client){ cpool.put(sid, client); }
  static void removeClient(String sid){ cpool.remove(sid); }

  class Client extends Thread{

    private String sid;
    private String host;
    private int port;

    Client(String sid, String host, int port){
      super();
      this.sid=sid;
      this.host=host;
      this.port=port;
      putClient(sid, this);
    }

    public int dataremain=0;
    public byte command=0;

    private Socket socket=null;
    private InputStream in;
    private OutputStream out;

    boolean connected=false;

    boolean isConnected(){
      return connected;
    }

    void connect(){
      try{
	socket=new Socket(host, port);
//System.out.println("socket: "+socket);
	in=socket.getInputStream();
	out=socket.getOutputStream();
	connected=true;
	start();
      }
      catch(Exception e){
	System.out.println(e);
      }
    }

    public void send(byte[] foo, int s, int l){
//System.out.println("send: "+new String(foo, s, l));
      try{
	out.write(foo, s, l);
	out.flush();
      }
      catch(Exception e){
	System.out.println(e);
      }
    }

    public void run(){
      byte[] buf=new byte[1024];
      while(true){
	try{
	  int space=space();
          if(space>0){
	    if(space>buf.length)space=buf.length;
	    int i=in.read(buf, 0, space);
//System.out.println("run read: "+i);
            if(i<0){
              break;
	    }
//System.out.println(new String(buf, 0, i));
	    if(i>0){
	      push(buf, 0, i);
	      try{ Thread.sleep(1); }
	      catch(Exception ee){}
	      continue;
	    }
	  }
	  while(true){
	    if(space()>0) break;
	    try{ Thread.sleep(1000); }
	    catch(Exception ee){
	    }
	  }
	}
	catch(java.net.SocketException e){
	  //System.out.println(e);
	  break;
	}
	catch(Exception e){
	  //System.out.println(e);
	}
      }
      close();
    }

    int buflen=0;
//    byte[] buf=new byte[1024];
//    byte[] buf=new byte[4096];
    byte[] buf=new byte[10240];
    synchronized int space(){
//System.out.println("space "+(buf.length-buflen));
      return buf.length-buflen;
    }
    synchronized void push(byte[] foo, int s, int l){
//System.out.println("push "+l);
      System.arraycopy(foo, s, buf, buflen, l);
      buflen+=l;
    }
    synchronized int pop(byte[] foo, int s, int l){
      if(buflen==0){
//System.out.println("pop "+0);
	return 0;
      }
      if(l>buflen)l=buflen;
      System.arraycopy(buf, 0, foo, s, l);
      System.arraycopy(buf, l, buf, 0, buflen-l);
      buflen-=l;

      if(socket==null && buflen<=0){
	removeClient(sid);
      }
//System.out.println("pop: "+l);
      return l;
    }

    public void close(){
      try{
	in.close();
	out.close();
	socket.close();
	socket=null;
      }
      catch(Exception e){
      }
      if(buflen==0){
	removeClient(sid);
      }
    }

  }
}