asp.net – 如何从HttpClient.PostAsJsonAsync()生成的Content-T

除了“Content-Type”标题中的“application / json”之外,该方法还添加了“charset = utf-8”

所以标题看起来像这样：

Content-Type：application / json;字符集= utf-8的

虽然ASP.NET WebAPI对此标头没有任何问题,但我发现我作为客户端工作的其他WebAPI不接受带有此标头的请求,除非它只是application / json.

无论如何在使用PostAsJsonAsync()时从Content-Type中删除“charset = utf-8”,还是应该使用其他方法？

解：
Yishai的积分！

using System.Net.Http.Headers;

public class NoCharSetJsonMediaTypeFormatter : JsonMediaTypeFormatter
{
   public override void SetDefaultContentHeaders(Type type,HttpContentHeaders headers,MediaTypeHeaderValue mediaType)
   {
       base.SetDefaultContentHeaders(type,headers,mediaType);
       headers.ContentType.CharSet = "";
   }
}

public static class HttpClientExtensions
{
    public static async Task<HttpResponseMessage> PostAsJsonWithNoCharSetAsync<T>(this HttpClient client,string requestUri,T value,CancellationToken cancellationToken)
    {
        return await client.PostAsync(requestUri,value,new NoCharSetJsonMediaTypeFormatter(),cancellationToken);
    }

    public static async Task<HttpResponseMessage> PostAsJsonWithNoCharSetAsync<T>(this HttpClient client,T value)
    {
        return await client.PostAsync(requestUri,new NoCharSetJsonMediaTypeFormatter());
    }
}