使用 Bearer Token 在 C# 中构建 post HttpClient 请求

Question

I'm not really a C# expert and I have a post httpRequest in C# to develop and for this I created this method that takes a Uri, an object and a bearer token.

This method aims to build the calling request:

private HttpClient client = new HttpClient(); 
public async Task<UserResponse> CreateUser(Uri url, UserRequest userRequest, string token)
{
        
    client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
    client.DefaultRequestHeaders.TryAddWithoutValidation("Content-Type", "application/json; charset=utf-8");


    string requestObject = JsonConvert.SerializeObject(userRequest);
    Console.WriteLine("My Object: " + requestObject);
    var req = new HttpRequestMessage(HttpMethod.Post, url);
    req.Headers.Authorization = new AuthenticationHeaderValue("Bearer", token);
    req.Content = new StringContent(
        requestObject,
        Encoding.UTF8,
        "application/json"
    );

    Console.WriteLine(req.ToString());
    var response = await client.SendAsync(req); 
        
    string output = await response.Content.ReadAsStringAsync();
    Console.WriteLine(JsonConvert.DeserializeObject(output));

    UserResponse returnValue = JsonConvert.DeserializeObject<UserResponse>(output);
    return returnValue;
}

My issue is that i'm not sure I'm passing correctly my header content. The return response is an error message telling I'm not authenticated.

Thanks

Answer 1

you have to add token this way:

var baseAddress = "http://....";
var api = ".....";
client.BaseAddress = new Uri(baseAddress);

var contentType = new MediaTypeWithQualityHeaderValue("application/json");

client.DefaultRequestHeaders.Accept.Add(contentType);
client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", token);

var postData = JsonConvert.SerializeObject(userRequest);
contentData = new StringContent(postData, Encoding.UTF8, "application/json");

var response = await client.PostAsync(baseUrl + api, contentData);

if (response.IsSuccessStatusCode)
{
var stringData = await response.Content.ReadAsStringAsync();
return JsonConvert.DeserializeObject<UserResponse>(stringData);
}
else
{
}