C# HttpClient tor socks4/5 proxy?

Question

I can set http proxy with this code:

public class CustomFlurlHttpClient : DefaultHttpClientFactory {
    public override HttpClient CreateClient(Url url, HttpMessageHandler m) {
        return base.CreateClient(url, CreateProxyHttpClientHandler("http://192.168.0.103:9090"));
    }

    private HttpClientHandler CreateProxyHttpClientHandler(string proxyUrl, string user = "", string passw = "") {
        NetworkCredential proxyCreds = null;
        var proxyUri = new Uri(proxyUrl);
        proxyCreds = new NetworkCredential (user, passw);
        var proxy = new WebProxy (proxyUri, false) {
            UseDefaultCredentials = false,
            Credentials = proxyCreds
        };
        var clientHandler = new HttpClientHandler {
            UseProxy = true,
            Proxy = proxy,
            PreAuthenticate = true,
            UseDefaultCredentials = false
        };
        if (user != "" && passw != "") {
            clientHandler.Credentials = new NetworkCredential (user, passw);
        }
        return clientHandler;
    }
}
class MainClass {
    public static void Main (string[] args) {
        run ();
        Console.ReadKey ();
    }

    async static void run() {
        using(FlurlClient client = new FlurlClient(c => { c.HttpClientFactory = new CustomFlurlHttpClient();})) {
            var result = await client.WithUrl("https://www.google.com").GetStringAsync();
            Console.WriteLine(result);
        };
    }
}

but not socks proxy. Any ideas how to do it? Or any other(not deprecated) rest client with async/await syntax supported?

Generally anything you can do with HttpClient, you can do with Flurl. Unfortunately I'm not finding any examples and I'm not very familiar with SOCKS personally. Maybe reframe this as an HttpClient question and someone will chime in. — Todd Menier, Apr 08 '17 at 13:45

Majid · Answer 1 · 2022-05-23T05:34:20.233

In .NET 6 you can do it easily as I answered here

But here is a quick answer:

var proxy = new WebProxy
{
    Address = new Uri("socks5://localhost:8080")
};
//proxy.Credentials = new NetworkCredential(); //Used to set Proxy logins. 
var handler = new HttpClientHandler
{
    Proxy = proxy
};
var httpClient = new HttpClient(handler);

or to configure a named HttpClient to be created using IHttpClientFactory:

Services.AddHttpClient("WithProxy")
    .ConfigurePrimaryHttpMessageHandler(() =>
    {
        var proxy = new WebProxy
        {
            Address = new Uri("socks5://localhost:8080")
        };
        return new HttpClientHandler
        {
                    Proxy = proxy
         };
    });

and when you injected IHttpClientFactory object:

httpClient = httpClientFactory.CreateClient("WithProxy");

score 3 · Accepted Answer · answered Apr 12 '17 at 11:44

3

Possible solution is to use Extreme.Net package, that provide socks proxy handler. For example, from code above we need to replace CreateClient method with this:

        public override HttpClient CreateClient(Url url, HttpMessageHandler m)
    {
        var socksProxy = new Socks5ProxyClient("127.0.0.1", 9150);
        var handler = new ProxyHandler(socksProxy);
        return base.CreateClient(url, handler);
    }

And it works!

answered Apr 12 '17 at 11:44

abritov

373
4
11

Nice! That does look like it'll work, but it is possible to override the creation of just the MessageHandler and let the default factory create the HttpClient, as I'll demonstrate in a new answer. – Todd Menier Aug 18 '17 at 14:24
Extreme.Net is deprecated? – Toolkit Jan 02 '19 at 11:52
according to nuget – yes – abritov Jan 03 '19 at 12:46

score 2 · Answer 3 · answered Aug 18 '17 at 14:22

A slightly better option is to override CreateMessageHandler instead of CreateClient in your custom factory:

public class CustomFlurlHttpClient : DefaultHttpClientFactory
{
    public override HttpMessageHandler CreateMessageHandler() {
        var socksProxy = new Socks5ProxyClient("127.0.0.1", 9150);
        return new ProxyHandler(socksProxy);
    }
}

C# HttpClient tor socks4/5 proxy?

3 Answers3

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