Question

我在ASP.NET MVC项目中遇到HttpClient阻塞问题，它完全拒绝允许Content-Type标头。我知道技术上它没有任何意义，但对于我所说的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'

他们需要这些标头，如果您退出Content-type标头，则会返回BadRequest。我无法控制这一点。

我设法让它在.NET Core 2中运行，但它在MVC中完全被拒绝了。以下是代码示例：

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);

以上工作在.Net Core但不适用于MVC。它会抛出一个ProtocolViolationException。

我可以在MVC中强制执行哪些操作 - 在GET请求中包含Content-Type标头？

Answer 1

content-type被设置为MVC中的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中执行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();

如何在ASP.NET MVC中使用GET请求发送Content-Type标头？

1 个答案: