java中的代理服务器
我有代理服务器的以下代码。 这是正确的方法吗? 如果商业部署,这能够处理负载/流量吗?
package proxyserver;
import com.sun.corba.se.spi.activation.Server;
import java.net.* ;
import java.io.* ;
import java.lang.* ;
import java.util.* ;
/**
*
* @author user
*/
public class Main {
/**
* @param args the command line arguments
*/
// Variable to track if an error occurred
boolean errorOccurred = false;
//Variables for the host and port parameters
public static void main(String[] args) {
// TODO code application logic here
int localPort = -1;
int remotePort = -1;
String remoteHost = "www.youtube.com";
System.out.print("dwdsw");
Integer parseLocalPort = new Integer(555);
Integer parseRemotePort = new Integer(80);
localPort =80 ;
remotePort = 80;
//Create a listening socket at proxy
ServerSocket server = null;
try
{
server = new ServerSocket(localPort);
}
catch(IOException e)
{
System.err.println("Error: " + e.getMessage());
System.exit(-1);
}
//Loop to listen for incoming connection,
//and accept if there is one
Socket incoming = null;
Socket outgoing = null;
while(true)
{
try
{
// Create the 2 sockets to transmit incoming
// and outgoing traffic of proxy server
incoming = server.accept();
outgoing = new Socket(remoteHost, remotePort);
// Create the 2 threads for the incoming
// and outgoing traffic of proxy server
ProxyThread thread1 = new ProxyThread(incoming, outgoing);
thread1.start();
ProxyThread thread2 = new ProxyThread(outgoing, incoming);
thread2.start();
}
catch (UnknownHostException e)
{
System.err.println("Error: Unknown Host " + remoteHost);
System.exit(-1);
}
catch(IOException e)
{
//continue
System.exit(-2);;
}
}
}
}
现在代理类
package proxyserver;
/**
*
* @author user
*/
import java.net.* ;
import java.io.* ;
import java.lang.* ;
import java.util.* ;
class ProxyThread extends Thread
{
Socket incoming, outgoing;
ProxyThread(Socket in, Socket out)
{
incoming = in;
outgoing = out;
}
// Overwritten run() method of thread,
// does the data transfers
public void run()
{
byte[] buffer = new byte[5000];
int numberRead = 0;
OutputStream toClient;
InputStream fromClient;
try{
toClient = outgoing.getOutputStream();
fromClient = incoming.getInputStream();
while(true)
{
numberRead = fromClient.read(buffer, 0, 50);
if(numberRead == -1)
{
incoming.close();
outgoing.close();
}
String st = new String(buffer,"US-ASCII");
System.out.println("\n\nXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\n\nXXXXXXXXXXXXXXXX\n\n" + st);
toClient.write(buffer, 0, numberRead);
}
}
catch(IOException e)
{
}
catch(ArrayIndexOutOfBoundsException e)
{
}
}
}
i have the follwoing code of proxy server. IS if the right approach? Will this be able to handel load/trafffic if deployed comerially??
package proxyserver;
import com.sun.corba.se.spi.activation.Server;
import java.net.* ;
import java.io.* ;
import java.lang.* ;
import java.util.* ;
/**
*
* @author user
*/
public class Main {
/**
* @param args the command line arguments
*/
// Variable to track if an error occurred
boolean errorOccurred = false;
//Variables for the host and port parameters
public static void main(String[] args) {
// TODO code application logic here
int localPort = -1;
int remotePort = -1;
String remoteHost = "www.youtube.com";
System.out.print("dwdsw");
Integer parseLocalPort = new Integer(555);
Integer parseRemotePort = new Integer(80);
localPort =80 ;
remotePort = 80;
//Create a listening socket at proxy
ServerSocket server = null;
try
{
server = new ServerSocket(localPort);
}
catch(IOException e)
{
System.err.println("Error: " + e.getMessage());
System.exit(-1);
}
//Loop to listen for incoming connection,
//and accept if there is one
Socket incoming = null;
Socket outgoing = null;
while(true)
{
try
{
// Create the 2 sockets to transmit incoming
// and outgoing traffic of proxy server
incoming = server.accept();
outgoing = new Socket(remoteHost, remotePort);
// Create the 2 threads for the incoming
// and outgoing traffic of proxy server
ProxyThread thread1 = new ProxyThread(incoming, outgoing);
thread1.start();
ProxyThread thread2 = new ProxyThread(outgoing, incoming);
thread2.start();
}
catch (UnknownHostException e)
{
System.err.println("Error: Unknown Host " + remoteHost);
System.exit(-1);
}
catch(IOException e)
{
//continue
System.exit(-2);;
}
}
}
}
now proxy classs
package proxyserver;
/**
*
* @author user
*/
import java.net.* ;
import java.io.* ;
import java.lang.* ;
import java.util.* ;
class ProxyThread extends Thread
{
Socket incoming, outgoing;
ProxyThread(Socket in, Socket out)
{
incoming = in;
outgoing = out;
}
// Overwritten run() method of thread,
// does the data transfers
public void run()
{
byte[] buffer = new byte[5000];
int numberRead = 0;
OutputStream toClient;
InputStream fromClient;
try{
toClient = outgoing.getOutputStream();
fromClient = incoming.getInputStream();
while(true)
{
numberRead = fromClient.read(buffer, 0, 50);
if(numberRead == -1)
{
incoming.close();
outgoing.close();
}
String st = new String(buffer,"US-ASCII");
System.out.println("\n\nXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\n\nXXXXXXXXXXXXXXXX\n\n" + st);
toClient.write(buffer, 0, numberRead);
}
}
catch(IOException e)
{
}
catch(ArrayIndexOutOfBoundsException e)
{
}
}
}
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评论(2)
[好吧...够戏弄了:-)]
不过看起来它应该可以工作:
最后针对此事回应一下:
不可能说你可以通过这个程序泵送多少负载。 首先,这取决于您的处理器和网络接口硬件。
[ OK ... enough teasing :-) ]
It looks like it should work, though:
Finally, in response to this:
It is impossible to say how much load you could pump through this program. For a start, it will depend on your processor and network interface hardware.
它看起来原则上是正确的,但你应该看一下开源版本,例如 TCP Proxy 有关最大化吞吐量、提高弹性等的指导。
It looks about right in principle but you should take a look at an open source version like TCP Proxy for pointers on maximizing throughput, increasing resilience, etc.