C#•10mo ago

Different HttpClient headers

When I make an HTTP request in my browser (Chrome), I get different response headers than I do in my program using HttpClient with a HttpClientHandler I'm using all the exact same headers, including the same cookies, and making the request to the same URL - I also have redirects disabled Why could this be? Chrome shows me 11 headers, whereas C#'s HttpClient only shows me 6 headers from the exact same request

10 Replies

leowest•10mo ago

unhappily its really hard to guess without code

Angius•10mo ago

Are you spoofing the Chrome user agent as well?

leowest•10mo ago

should if he is sending the same headers as he said

UnemployedNinjaOP•10mo ago

c#
HttpClientHandler handler = new HttpClientHandler();
handler.AllowAutoRedirect = false;
if (proxy != null) handler.Proxy = proxy;

using (HttpClient client = new HttpClient(handler, true))
using (HttpResponseMessage response = await client.GetAsync($"https://us.battle.net/")) {

    client.DefaultRequestHeaders.Add("Accept-Encoding", "gzip, deflate, br, zstd");
    // ... More headers, including the cookies ...

    if (response.StatusCode == HttpStatusCode.Found) {
        HttpResponseHeaders headers = response.Headers;

        var headersDict = headers.ToDictionary(a => a.Key, a => a.Value);

        Console.WriteLine("\nHeaders:");
        foreach (var (key, value) in headersDict) {
            string valStr = "";
            foreach (string val in value) { valStr += val; }
            Console.WriteLine($"  {key}: {valStr}");
        }
    }

}

c#
HttpClientHandler handler = new HttpClientHandler();
handler.AllowAutoRedirect = false;
if (proxy != null) handler.Proxy = proxy;

using (HttpClient client = new HttpClient(handler, true))
using (HttpResponseMessage response = await client.GetAsync($"https://us.battle.net/")) {

    client.DefaultRequestHeaders.Add("Accept-Encoding", "gzip, deflate, br, zstd");
    // ... More headers, including the cookies ...

    if (response.StatusCode == HttpStatusCode.Found) {
        HttpResponseHeaders headers = response.Headers;

        var headersDict = headers.ToDictionary(a => a.Key, a => a.Value);

        Console.WriteLine("\nHeaders:");
        foreach (var (key, value) in headersDict) {
            string valStr = "";
            foreach (string val in value) { valStr += val; }
            Console.WriteLine($"  {key}: {valStr}");
        }
    }

}

Yes

leowest•10mo ago

you're adding the headers after u made the request it needs to be done before

UnemployedNinjaOP•10mo ago

omfg ok.......................

leowest•10mo ago

you add your headers to the HttpClientHandler

UnemployedNinjaOP•10mo ago

ty lol I'm so dumb

leowest•10mo ago

and that's why posting code = quick job

UnemployedNinjaOP•10mo ago

An hour of my life................... ty lol

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Different HttpClient headers