为什么Java不支持socks4？
考虑此代码：
Proxy p = new Proxy(Type.SOCKS, new InetSocketAddress(proxyURL, port));
try {
long time = System.currentTimeMillis();
URLConnection urlConn = url.openConnection(p);
System.out.println(urlConn.getContent());
int ping = (int)(System.currentTimeMillis() - time);
System.out.println(proxyURL+ ":" +port+ " ... works as SOCKS, ping: " +ping);
} catch (IOException e) {
//e.printStackTrace();
}
我已经通过 Wireshark 验证这在有效的ocks4代理上不起作用。此时，这些是有效的socks4 ONLY代理服务器：
92.241.233.75:1080
58.214.5.162:1080
222.51.38.138:1080
121.8.124.42:1080
220.179.61.62:1080
75.125.63.178:1080
201.59.145.141:1080
117.20.60.144:1080
但是，给它提供一个有效的socks5代理，它就可以正常工作：
62.243.224.179
Take this code into consideration:
Proxy p = new Proxy(Type.SOCKS, new InetSocketAddress(proxyURL, port));
try {
long time = System.currentTimeMillis();
URLConnection urlConn = url.openConnection(p);
System.out.println(urlConn.getContent());
int ping = (int)(System.currentTimeMillis() - time);
System.out.println(proxyURL+ ":" +port+ " ... works as SOCKS, ping: " +ping);
} catch (IOException e) {
//e.printStackTrace();
}
I have verified though Wireshark that this doesn't work on a valid socks4 proxy. At this time these are valid socks4 ONLY proxy servers:
92.241.233.75:1080
58.214.5.162:1080
222.51.38.138:1080
121.8.124.42:1080
220.179.61.62:1080
75.125.63.178:1080
201.59.145.141:1080
117.20.60.144:1080
Yet, feed it a valid socks5 proxy and it works fine:
62.243.224.179
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这是一个答案。我没有测试它，但听起来它会起作用（但不是理想的解决方案）。
Here is an answer. I didn't test it, but sounds like it'll work (but not an ideal solution).