java - 为什么我的 SOCKS 代理代码抛出 SocketException : Malformed reply from SOCKS server?

Question

为什么我的 SOCKS 代理代码抛出 SocketException: Malformed reply from SOCKS server？我试过在 URLConnection 或其他中设置，但这不起作用。唯一有用的东西 - chilkat lib，但它是商业的。那么，例如，我如何通过 ASOCKS 代理发出 http 请求？也许存在一些免费的库？

例如，代码:

    SocketAddress addr = new InetSocketAddress(proxy_ip, proxy_port);
    Proxy proxy = new Proxy(Proxy.Type.SOCKS, addr);
    Socket socket = new Socket(proxy);
    InetSocketAddress dest = new InetSocketAddress("google.com", 80);
    try {
        socket.connect(dest);
    } catch (IOException ex) {
        Logger.getLogger(CheckProxy.class.getName()).log(Level.SEVERE, null, ex);
    }

抛出异常:

java.net.SocketException: Malformed reply from SOCKS server
at java.net.SocksSocketImpl.readSocksReply(Unknown Source)
at java.net.SocksSocketImpl.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at proxychecker.CheckProxy.SocksCheck(CheckProxy.java:86)

第 86 行是“socket.connect(dest);”

Answer 1

此错误的解释:bugs.java.com/view_bug.do?bug_id=6964547

您需要使用此代码手动更改 Socket 对象中的模式:

Class clazzSocks  = socket.getClass();
Method setSockVersion  = null;
Field sockImplField = null; 
SocketImpl socksimpl = null; 
try {
  sockImplField = clazzSocks.getDeclaredField("impl");
  sockImplField.setAccessible(true);
  socksimpl  = (SocketImpl) sockImplField.get(socket);
  Class clazzSocksImpl  =  socksimpl.getClass();
  setSockVersion  = clazzSocksImpl.getDeclaredMethod("setV4");
  setSockVersion.setAccessible(true);
  if(null != setSockVersion){
      setSockVersion.invoke(socksimpl);
  }
  sockImplField.set(socket, socksimpl);
} catch (Exception e) {

}