Http系列笔记

万能的HttpClient （Framework与NetCore 都支持）

 string url = "http://localhost:5000/api/values";

 //post请求中，参数以json格式时，必定义
 var handler = new HttpClientHandler() { AutomaticDecompression = DecompressionMethods.GZip };
 , Name = "smile" };
 using (var hc = new HttpClient(handler))
 {
 8       HttpContent httpContent = new StringContent(JsonConvert.SerializeObject(user), Encoding.UTF8, "application/json");
       var res = hc.PostAsync(url, httpContent);
       var s = res.Result;
       var ss = s.Content.ReadAsStringAsync().Result;
       Console.WriteLine(ss);
 }

还可以这么写，同样的功能

public class HttpClientWapper
{
        private static HttpClient _httpClient = new HttpClient();
        public static async Task<string> PostStringAsync(string requestUri, string json)
        {
            using (var requestMessage = new HttpRequestMessage(HttpMethod.Post, requestUri))
            {
                requestMessage.Content = new StringContent(json, Encoding.UTF8, "application/json");
                using (var responseMessage = await _httpClient.SendAsync(requestMessage, HttpCompletionOption.ResponseHeadersRead))
                {
                    if (responseMessage.StatusCode == HttpStatusCode.Unauthorized)
                        throw new ArgumentException("认证失败！");
                    responseMessage.EnsureSuccessStatusCode();
                    return await responseMessage.Content.ReadAsStringAsync();
                }
            }
        }
}