派生类java实现http代理服务

j av a实现http代理服务public void writeLog(byte[]bytes, int offset, int len,boolean browser)throws IOExc eption{for(int i=0; i len; i++)writeLog((int)bytes[offs et+i],brow s er);

//默认情况下 日志信息输出到

//标准输出设备

//派生类可以覆盖它public String processHostName(String url,String host, int port,Socket sock) {java.text.DateFormat cal=java.text.DateFormat.getDateTimeInstance();System.out.println(c al.format(new java.util.Date())+-+url+

+sock.getInetAddres s()+\nreturn host;

//执行操作的线程public void run() {

String line;

String host;int port=80;

S oc ket outbound=null;try{s ocket.s etSoTimeout(TIMEOUT);

InputStream is=s oc ket.getInputStream();

OutputStream os=null;

try{

//获取请求行的内容line=host=int state=0;boolean space;w hile(true) {int c=is.read();if(c==-1)break;if(logging)wr iteLo g(c, true);spac e=Character.isWhitespac e((char)c);sw itch(state) {case0:if(space)c ontinue;state=1;case 1:if(space) {state=2;c ontinue;

line=line+(char)c;break;case2:if(space)c ontinue; //跳过多个空白字符state=3;case3:if(space) {state=4;

//只取出主机名称部分

String host0=host;int n;n=host.indexOf( //if(n!=-1)host=host.substring(n+2);n=host.indexOf(‘/’);if(n!=-1)host=host.substring(0,n);

//分析可能存在的端口号n=host.indexOf( :if(n!=-1) {port=Integer.parseInt(host.substring(n+1));

host=host.substring(0,n);host=processHostName(host0,host,port, socket);if(p arent !=null) {hos t=parent;port=parentP ort;int retry=CONNECT_RETRI ES;while(retry-- !=0) {try{outbound=new S oc ket(host,port);break;

} catch(Exc eption e) {

//等待

Thread.s leep(CONNECT_PAUSE);if(o utb o un d==nu ll)break;outbound.s etS oT imeout(T IMEOUT);o s=outb ound.getOutput S tream();os.write(line.getBytes());os.write(‘ ‘);os.write(host0.getBytes());os.write(‘ ‘);p ip e(is,outb ound.getInputS tream(),o s,

s oc ket.getOutputS tream());break;host=host+(char)c;break;

} catch(IOException e) {

} catch(Exc eption e) {

}final ly{try{socket.close();

} catch(Exception e1) {try{outbound.c lo s e();

} catch(Exc eption e2) {void pipe(InputStream is0, InputStream is 1,OutputStream os0,OutputStream os 1) throws IOException{try{int ir;byte bytes[]=new byte[BUFSIZ];w hile(true) {try{if((ir=is 0.read(bytes))0) {os0.write(bytes,0, ir);

if(logging)wr iteLo g(byte s,0, ir, true);

} else if(ir 0)break;

} catch(InterruptedIOExc eption e) {try{if((ir=is 1.read(bytes))0) {os 1.write(bytes,0, ir);if(logging)writeLo g(byte s,0, ir, fals e);

} else if(ir 0)break;

} catch(InterruptedIOExc eption e) {

} catch(Exception e0) {

System.out.println(Pipe异常:+e0);static public void startProxy(int port,Class clobj) {ServerSocket ssock;try{ssock=new ServerSocket(port);w hile(true) {

Class[] sarg=new Class[1];

Object[] arg=new Object[1];

sarg[0]=Socket.clas s;try{java.lang.reflect.Constructor cons=clobj

.getDeclaredConstructor(sarg);arg[0]=ssock.accept();c ons.newInstanc e(arg); //创建HttpProxy或其派生类的实例} catch(Exc eption e) {

Socket esock=(Socket)arg[0];try{esock.close();

} catch(Exception ec) {

} catch(IOException e) {static public void stopProxy(){try{if(null!=HttpProxy.s oc ket)

HttpProxy.socket.close();

} catch(IOException e) {e.printStackTrac e();

//测试用的简单main方法static public void main(String args[]) {

Sys tem.out.println(在端口808启动代理服务器\n

HttpProxy.lo g=S ys tem.out;

HttpProxy.lo gging=fals e;

HttpProxy.s tartProxy(808,HttpProxy.c las s);}

来自 http://c henyu-hz.iteye.c om/b lo g/1493227