Question

我想使用.NET HttpClient将新资源发布到端点。但是，我收到一条错误消息。在Postman中使用相同的标题和相同的内容执行相同的操作，后操作成功完成，没有任何错误。错误消息指出：

StatusCode: 415, ReasonPhrase: 'Unsupported Media Type', Version: 1.1, Content: System.Net.Http.StreamContent, Headers:
{
  X-Content-Type-Options: nosniff
  X-Content-Type-Options: nosniff
  X-UA-Compatible: IE=edge
  X-Frame-Options: SAMEORIGIN
  X-Generator: Drupal 8 (https://www.drupal.org)
  Keep-Alive: timeout=5, max=100
  Connection: Keep-Alive
  Transfer-Encoding: chunked
  Cache-Control: must-revalidate, no-cache, private
  Date: Tue, 08 Oct 2019 16:24:17 GMT
  Server: Apache/2.4.39
  Server: (Win64)
  Server: OpenSSL/1.1.1c
  Server: PHP/7.2.19
  X-Powered-By: PHP/7.2.19
  Content-language: en
  Content-Type: application/vnd.api+json
  Expires: Sun, 19 Nov 1978 05:00:00 GMT
}

我还尝试直接在HttpClient实例上使用PostAsync方法，而不是使用HttpRequestMessage实例。但是，此选项不起作用，因为我想在请求中设置自定义标头。 DefaultRequestHeaders.Add选项似乎不支持此功能。我正在按照Custom header to Httpclient request上类似问题的建议使用代码。下面是我的代码。

using Newtonsoft.Json;
using System;
using System.Net;
using System.Net.Http;


namespace ConsoleApp6
{
    class Program
    {
        static void Main(string[] args)
        {

            //the string that needs to be posted to endpoint. 
            string dd = @"{'data': { 'type': 'node--settings','attributes': {'title': 'Mail Server3'}}}";

            //outputting my text here to make sure that the text is a valid json.
            Console.WriteLine(JsonConvert.DeserializeObject(dd));

            //my http client using suggested solutions on the internet and here on stakeoverflow. 
            var client = new HttpClient();
            var httpRequestMessage = new HttpRequestMessage
            {
                Method = HttpMethod.Post,
                RequestUri = new Uri("http://localhost/pg/jsonapi/node/settings"),
                Headers = {
                { HttpRequestHeader.Authorization.ToString(), "Basic YXBpOmFwaQ==" },
                { HttpRequestHeader.ContentType.ToString(), "application/vnd.api+json" }
            },
                Content = new StringContent(JsonConvert.DeserializeObject(dd).ToString())
            };

            //posting the data here to the endpoint and capturing the request.
            var response = client.SendAsync(httpRequestMessage).Result;

            //here is the response I am getting. 

            Console.WriteLine(response);
            Console.ReadLine();
        }
    }
}

我希望该操作返回Status: 201 Created。我收到的状态消息是StatusCode: 415, ReasonPhrase: 'Unsupported Media Type'。对同一问题的其他答案表明这是服务器错误。就我而言，我不这么认为，因为我在here中表示的Postman中取得了正确的结果。

StatusCode：415，ReasonPhrase：“不受支持的媒体类型”，版本：1.1，内容：System.Net.Http.StreamContent

0 个答案: