Is there a way to use an HTTPS proxy in .NET 6?

Question

Is there a way to use an HTTPS proxy in .NET 6?

Dominik Bakos 0

I need to check if certain HTTPS proxies are working. If I try to access the base-address without the proxy, it works fine. Using the proxy I get an error saying I can only use HTTP or SOCKS proxies. The problem is, I wasn't able to find an alternate solution that supports HTTPS proxies. Here is my code so far:

var proxy = new WebProxy($"https://proxy-server:port");
    var handler = new HttpClientHandler { Proxy = proxy };

    using (var client = new HttpClient(handler))
    {
        client.BaseAddress = new Uri("https://base-address");
        client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Basic", credentials);

        try
        {
            var content = client.GetStringAsync(filepath).Result;
            Console.WriteLine(content);
        }
        catch (Exception e)
        {
            Console.WriteLine("Failed. Reason: " + e);
        }
    }

Jack J Jun 25,316

@Dominik Bakos, Welcome to Microsoft Q&A, I may have some problems on configuring the HTTPS proxy in my computer because I get the error that No connection could be made because the target machine actively refused it.

However, I see somebody has used the following code to use the HTTPS proxy successfully and you could check if it works for you.

var proxy = new WebProxy
            {
                Address = new Uri($"https://proxy-server:port"),
                BypassProxyOnLocal = false,
                UseDefaultCredentials = false,
                Credentials = new NetworkCredential(
        userName: "user",
        password: "Pass")
            };

            // Create a client handler that uses the proxy
            var httpClientHandler = new HttpClientHandler
            {
                Proxy = proxy,
            };

            // Disable SSL verification
            httpClientHandler.ServerCertificateCustomValidationCallback = HttpClientHandler.DangerousAcceptAnyServerCertificateValidator;

            // Finally, create the HTTP client object
            var client = new HttpClient(handler: httpClientHandler, disposeHandler: true);

            var result = await client.GetStringAsync("path");
            Console.WriteLine(result);

Your answer

Jack J Jun 25,316 Reputation points

2023-02-17T07:04:01.8933333+00:00

@Dominik Bakos, Welcome to Microsoft Q&A, I may have some problems on configuring the HTTPS proxy in my computer because I get the error that No connection could be made because the target machine actively refused it.

However, I see somebody has used the following code to use the HTTPS proxy successfully and you could check if it works for you.

var proxy = new WebProxy { Address = new Uri($"https://proxy-server:port"), BypassProxyOnLocal = false, UseDefaultCredentials = false, Credentials = new NetworkCredential( userName: "user", password: "Pass") }; // Create a client handler that uses the proxy var httpClientHandler = new HttpClientHandler { Proxy = proxy, }; // Disable SSL verification httpClientHandler.ServerCertificateCustomValidationCallback = HttpClientHandler.DangerousAcceptAnyServerCertificateValidator; // Finally, create the HTTP client object var client = new HttpClient(handler: httpClientHandler, disposeHandler: true); var result = await client.GetStringAsync("path"); Console.WriteLine(result);

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Is there a way to use an HTTPS proxy in .NET 6?

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