How to implement a proxy server?

Question

I'm looking to have my application connect to the internet through a proxy server (in order to avoid captcha). The code I am currently using is this:

Properties props = System.getProperties();
props.put("http.proxyPort", proxyPort); //proxy port
props.put("http.proxyHost", proxyHost); //proxy host
props.put("http.proxySet", "true");

This code has been unsuccesful, however. Any suggestions?

You might need to set the proxy for https as well. Set the properties https.proxyPort and https.proxyHost. It might also help to set these properties in the JAVA_OPTS environment variable so they're picked up by every Java app on your system. — David
– David, Commented Jul 26, 2012 at 14:27
Sites like omegle.com (something my app connects to) generate a captcha depending on how many connections your IP has had in the past minute/hour/day. New IP = avoid captcha. — John Smith
– John Smith, Commented Jul 26, 2012 at 14:33
@JohnSmith: That looks like pretty badass idea, that is going to fail, because the proxy doesn't change IP when you connect to it. Or you should use each time another proxy, which is pretty hard. — Martijn Courteaux
– Martijn Courteaux, Commented Jul 26, 2012 at 14:34

Arvik · Accepted Answer · 2012-07-26 14:37:02Z

2

You can try the following:

SocketAddress sa = new InetSocketAddress(proxy_host_name, proxy_port_address);
Proxy proxy = new Proxy(Proxy.Type.xxx, sa);
URLConnection con = new URL(url).openConnection(proxy);

answered Jul 26, 2012 at 14:37

Arvik

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Martijn Courteaux · Accepted Answer · 2012-07-26 14:51:36Z

0

You are probably using a kind of "User Friendly Website Proxy", like http://newipnow.com or www.proxyultra.com. But you need to use a real SOCKS proxy server.

A free server, that I found, working, in a list of public Proxies:

System.setProperty("http.proxyHost", "187.115.172.82");
System.setProperty("http.proxyPort", "8181");

There is no need to set the http.proxySet property.

Pick a server from the nice list here: Hide My Ass: Proxy List

edited Jul 26, 2012 at 14:51

answered Jul 26, 2012 at 14:45

Martijn Courteaux

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Michael Petrotta · Accepted Answer · 2013-05-07 17:03:59Z

0

Put the parameters on the command line or use setProperty.

java -Dhttp.proxyHost=proxy.host -Dhttp.proxyPort=3128 MainClass

edited May 7, 2013 at 17:03

Michael Petrotta

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answered May 7, 2013 at 16:40

btafarelo

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