user3511070 user3511070 - 1 year ago 779
Java Question

How to use Socks 5 proxy with Apache HTTP Client 4?

I'm trying to create app that sends

requests via Apache HC 4 via SOCKS5 proxy.
I can not use app-global proxy, because app is multi-threaded (I need different proxy for each
instance). I've found no examples of SOCKS5 usage with HC4. How can I use it?

Answer Source

SOCK is a TCP/IP level proxy protocol, not HTTP. It is not supported by HttpClient out of the box.

One can customize HttpClient to establish connections via a SOCKS proxy by using a custom connection socket factory

EDIT: changes to SSL instead of plain sockets

Registry<ConnectionSocketFactory> reg = RegistryBuilder.<ConnectionSocketFactory>create()
        .register("http", PlainConnectionSocketFactory.INSTANCE)
        .register("https", new MyConnectionSocketFactory(SSLContexts.createSystemDefault()))
PoolingHttpClientConnectionManager cm = new PoolingHttpClientConnectionManager(reg);
CloseableHttpClient httpclient = HttpClients.custom()
try {
    InetSocketAddress socksaddr = new InetSocketAddress("mysockshost", 1234);
    HttpClientContext context = HttpClientContext.create();
    context.setAttribute("socks.address", socksaddr);

    HttpHost target = new HttpHost("localhost", 80, "http");
    HttpGet request = new HttpGet("/");

    System.out.println("Executing request " + request + " to " + target + " via SOCKS proxy " + socksaddr);
    CloseableHttpResponse response = httpclient.execute(target, request, context);
    try {
    } finally {
} finally {

static class MyConnectionSocketFactory extends SSLConnectionSocketFactory {

    public MyConnectionSocketFactory(final SSLContext sslContext) {

    public Socket createSocket(final HttpContext context) throws IOException {
        InetSocketAddress socksaddr = (InetSocketAddress) context.getAttribute("socks.address");
        Proxy proxy = new Proxy(Proxy.Type.SOCKS, socksaddr);
        return new Socket(proxy);

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