使用来自 webapi 的 HttpClient 使用 xml

Question

我使用 WebClient 从 restfull 服务 (.net web api) 获取了一个 Xml 对象，并且一切正常：

using(WebClient client = new WebClient())
{
   client.Encoding = UTF8Encoding.UTF8;
   client.Headers[HttpRequestHeader.ContentType] = "text/xml";
   client.Credentials = // ....;
   xmlResult = webClient.DownloadString(url);
}

....

此代码效果很好。我得到一个 Xml 作为字符串返回，每个人都很高兴。

现在，我更改了它，以便它可以与 HttpClient 一起使用，但我无法返回 Xml - 始终是 json 作为字符串。

using(var handler = new HttpClientHandler() {Credentials = new NetworkCredentials})
using(var client = new HttpClient(handler))
{
   var request = new HttpRequestMessage(HttpMethod.Get, url);
   request.Headers.Add(HttpRequestHeader.ContentType.ToString(), "text/xml");
   returnedXml = client.SendAsync(request).Result.Content.ReadAsStringAsync().Result;
}

我做错了什么？怎样才能得到我向往的Xml？

谢谢

Answer 1

试试这个..

using(var handler = new HttpClientHandler() {Credentials = new NetworkCredentials})
using(var client = new HttpClient(handler))
{
      client.DefaultRequestHeaders
      .Accept
      .Add(new MediaTypeWithQualityHeaderValue("text/xml"));
   var request = new HttpRequestMessage(HttpMethod.Get, url);
    returnedXml = client.SendAsync(request).Result.Content.ReadAsStringAsync().Result;
}

Answer 2

想通了！

我应该添加一个 Accept header，它的类型应该是 "application/xml"。

工作版本：

using(var handler = new HttpClientHandler() {Credentials = new NetworkCredentials})
using(var client = new HttpClient(handler))
{
  var request = new HttpRequestMessage(HttpMethod.Get, url);
  request.Headers.Add(HttpRequestHeader.Accept.ToString(), "application/xml");
  returnedXml = client.SendAsync(request).Result.Content.ReadAsStringAsync().Result;
}

使用来自 webapi 的 HttpClient 使用 xml

Consuming xml using HttpClient from webapi

.net

asp.net-web-api

dotnet-httpclient