C# 如何在ASP.NET MVC中通过GET请求发送内容类型标头？

我在ASP.NET MVC项目中遇到了一个与

HttpClient

有关的阻塞问题，它完全拒绝允许

内容类型

标题。我知道从技术上讲它没有任何意义，但对于我正在调用的API，它是必需的

curl -X GET \
  https://api.sample-service.com/v1/items \
  -H 'content-type: application/json' \
  -H 'secret-key: sk_test_12345'

它们需要这些标题，如果您不使用

内容类型

标题，它将返回

BadRequest

。我无法控制这一切

我在.NETCore2中成功地实现了这一点，但在MVC中它被完全否定了。下面是代码示例：

var client = new HttpClient
{
   BaseAddress = new Uri("https://api.sample-service.com/v1/")
};

client.DefaultRequestHeaders.Add("secret-key", "my-secret-key");

var content = new StreamContent(Stream.Null);
content.Headers.Add("Content-Type", "application/json");

var request = new HttpRequestMessage(HttpMethod.Get, "items")
{
   Content = content
};

var response = await client.SendAsync(request);

以上内容适用于.NETCore，但不适用于MVC。它抛出一个

ProtocolViolationException

---

在MVC中如何强制在GET请求中包含

内容类型

头？

内容类型在MVC中设置为HttpWebRequest的属性

var httpWebRequest = (HttpWebRequest)WebRequest.Create(URL);   //URL is a string with your url
httpWebRequest.ContentType = "application/json";

这就是我通常在MVC中处理Web请求的方式

string URL = ""; //your url
if (URL.Contains("https"))
            {
                ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls;
                ServicePointManager.ServerCertificateValidationCallback = (RemoteCertificateValidationCallback)Delegate.Combine(ServicePointManager.ServerCertificateValidationCallback, new RemoteCertificateValidationCallback((object s, X509Certificate ce, X509Chain ch, SslPolicyErrors tls) => true));
            }
CookieContainer cookieJar = new CookieContainer();
var httpWebRequest = (HttpWebRequest)WebRequest.Create(URL);   
string petition = ""; //leave empty for get requests  
string result = ""; //if the server answers it will do so here
httpWebRequest.ContentType = "application/json";
httpWebRequest.Method = "GET";
httpWebRequest.Headers["Authorization"] = "passkeydlkefjswlkejcvekexample"; //this is how you add custom headers, you can change it to anything
var streamWriter = new StreamWriter(httpWebRequest.GetRequestStream());


                streamWriter.Write(Petition);
                streamWriter.Flush();
                streamWriter.Close();


            var httpResponse = (HttpWebResponse)httpWebRequest.GetResponse();
            var streamReader = new StreamReader(httpResponse.GetResponseStream());

            result = streamReader.ReadToEnd();

---

可能是@NightOwl888的复制品，谢谢，但我试过了。它仍然抛出

ProtocolViolationException

，并显示消息“无法发送此动词类型的内容正文”