How to remove the default charset in HttpClient Request Header C#

Question

I am trying to hit an API from C# code. I am unable to get the response and receiving the status code "500 - Internal Server error".

Found the reason that the "Charset-UTF8" is getting appended in the request header

When i tried to hit the API in Fiddler without "Charset-UTF8", I am able to get the response in Fiddler and postman. With the "Charset-UTF8" i get the same 500 internal server error. The content type is application/json.

I even tried each and every charaset encoding methods UTF-8,16,32, unicode and default format from C# code, gives the same error.

Please let me know how to remove the CharSet(appending) from the API request Header.

please go through code i have attached

HttpClient client1 = new HttpClient();
client1.BaseAddress = new Uri("i have third party url");
client1.DefaultRequestHeaders
    .Accept
    .Add(new MediaTypeWithQualityHeaderValue("application/json"));//ACCEPT header
        client1.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue(
            "Basic",
            Convert.ToBase64String(
                System.Text.ASCIIEncoding.ASCII.GetBytes(
                    string.Format("{0}:{1}", userName, password))));

HttpRequestMessage request = new HttpRequestMessage(HttpMethod.Put, client1.BaseAddress);


StringContent content = new StringContent(JsonConvert.SerializeObject("working request"));


request.Content = content;

client1.SendAsync(request)
    .ContinueWith(responseTask =>
    {
        Console.WriteLine("Response: {0}", responseTask.Result);
    });

Have you tried the ideas from stackoverflow.com/questions/23161088/… ? — mjwills
– mjwills, Commented Jun 6, 2017 at 12:08
Remove cookies from you IE browser and try again. The server is probably still using the old cookie with the UTF8 setting. — jdweng
– jdweng, Commented Jun 6, 2017 at 12:28
@mjwills Thanks man! I got the solution from your link. I modified few lines to get httpclient response in return. — CMNagaraj
– CMNagaraj, Commented Jun 8, 2017 at 9:42
Awesome! Can you post what you ended up with, so that future people can see the solution? — mjwills
– mjwills, Commented Jun 8, 2017 at 9:43

Hung Quach · Accepted Answer · 2017-12-04 07:08:56Z

8

Try the solution below

content.Headers.Remove("Content-Type"); // "{application/json; charset=utf-8}"
content.Headers.Add("Content-Type", "application/json");

or

content.Headers.ContentType.CharSet = string.Empty;

I have submitted an issue on dotnet/corefx repo.

Check it out https://github.com/dotnet/corefx/issues/25290

Tested on .NET Core 2.0, .NET Standard 2.0

edited Dec 4, 2017 at 7:08

answered Nov 16, 2017 at 17:03

Hung Quach

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Comments

pkucas · Accepted Answer · 2020-03-27 17:00:05Z

0

If you want to remove the client request headers outside of the request:

myClient.DefaultRequestHeaders.Remove("Connection");
myClient.DefaultRequestHeaders.Add("Connection", "keep-alive");
myClient.DefaultRequestHeaders.Accept.Remove(new MediaTypeWithQualityHeaderValue("application/json"));
myClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));

answered Mar 27, 2020 at 17:00

pkucas

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