c# - 如何使用 HttpClient 发出 OPTIONS 请求

Question

如何使用 System.Net.Http.HttpClient 发送 OPTIONS 请求

HttpClient 的公开方法

删除异步

获取异步

异步后

PutAsync

还有其他几个......

我期待一个 OptionsAsync

   switch (httpMethod) {
      case HTTP_METHODS.DELETE:
       {
        httpResponseMessage = httpClient.DeleteAsync(uri).Result;
        break;
       }
      case HTTP_METHODS.GET:
       {
        httpResponseMessage = httpClient.GetAsync(uri).Result;
        break;
       }
      case HTTP_METHODS.POST:
       {
        httpResponseMessage = httpClient.PostAsync(uri, httpContent).Result;
        break;
       }
      case HTTP_METHODS.PUT:
       {
        httpResponseMessage = httpClient.PutAsync(uri, httpContent).Result;
        break;
       }
      case HTTP_METHODS.OPTION:
       {
        //not sure what method to call on httpclient here to make Options request
        httpResponseMessage = httpClient.PutAsync(uri, httpContent).Result;
        if (httpResponseMessage.Headers.Contains("X-CSRF-TOKEN")) {
         IEnumerable < string > headerValues = httpResponseMessage.Headers.GetValues("X-CSRF-TOKEN");
         csrfToken = headerValues.FirstOrDefault();
        }
        break;
       } 
     }

Answer 1

这种方法没有包装器(例如 OPTIONS 和 HEAD )，但您可以像这些包装器一样使用 SendAsync :

var request = new HttpRequestMessage(HttpMethod.Options, "url");
var result = await _httpClient.SendAsync(request);