我有一个问题
HttpClient.PostAsJsonAsync()
HttpClient.PostAsJsonAsync()
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());
}
}
解决方法
您可以从JsonMediaTypeFormatter派生并覆盖SetDefaultContentHeaders.
调用base.SetDefaultContentHeaders()然后清除headers.ContentType.CharSet
public static Task<HttpResponseMessage> PostAsJsonAsync<T>(this HttpClient client,CancellationToken cancellationToken)
{
return client.PostAsync(requestUri,new JsonMediaTypeFormatter(),cancellationToken);
}
本质上是这样的：
public static Task<HttpResponseMessage> PostAsJsonWithNoCharSetAsync<T>(this HttpClient client,CancellatioNToken cancellationToken)
{
return client.PostAsync(requestUri,cancellationToken);
}
