http请求的工具类

  1 public class HttpHelper
  2 {
  3     /// <summary>
  4     /// 发起POST同步请求
  5     /// </summary>
  6     /// <param name="url"></param>
  7     /// <param name="postData"></param>
  8     /// <param name="contentType">application/xml、application/json、application/text、application/x-www-form-urlencoded</param>
  9     /// <param name="headers">填充消息头</param>        
 10     /// <returns></returns>
 11     public static string HttpPost(string url, string postData = null, string contentType = null, int timeOut = 30, Dictionary<string, string> headers = null)
 12     {
 13         postData ??= "";
 14         using HttpClient client = new HttpClient();
 15         client.Timeout = new TimeSpan(0, 0, timeOut);
 16         if (headers != null)
 17         {
 18             foreach (var header in headers)
 19                 client.DefaultRequestHeaders.Add(header.Key, header.Value);
 20         }
 21         using HttpContent httpContent = new StringContent(postData, Encoding.UTF8);
 22         if (contentType != null)
 23             httpContent.Headers.ContentType = new System.Net.Http.Headers.MediaTypeHeaderValue(contentType);
 24 
 25         HttpResponseMessage response = client.PostAsync(url, httpContent).Result;
 26         return response.Content.ReadAsStringAsync().Result;
 27     }
 28 
 29     /// <summary>
 30     /// 发起POST异步请求
 31     /// </summary>
 32     /// <param name="url"></param>
 33     /// <param name="postData"></param>
 34     /// <param name="contentType">application/xml、application/json、application/text、application/x-www-form-urlencoded</param>
 35     /// <param name="headers">填充消息头</param>        
 36     /// <returns></returns>
 37     public static async Task<string> HttpPostAsync(string url, string postData = null, string contentType = null, int timeOut = 30, Dictionary<string, string> headers = null)
 38     {
 39         postData ??= "";
 40         using HttpClient client = new HttpClient();
 41         client.Timeout = new TimeSpan(0, 0, timeOut);
 42         if (headers != null)
 43         {
 44             foreach (var header in headers)
 45                 client.DefaultRequestHeaders.Add(header.Key, header.Value);
 46         }
 47         using HttpContent httpContent = new StringContent(postData, Encoding.UTF8);
 48         if (contentType != null)
 49             httpContent.Headers.ContentType = new System.Net.Http.Headers.MediaTypeHeaderValue(contentType);
 50 
 51         HttpResponseMessage response = await client.PostAsync(url, httpContent);
 52         return await response.Content.ReadAsStringAsync();
 53     }
 54 
 55     /// <summary>
 56     /// 发起GET同步请求
 57     /// </summary>
 58     /// <param name="url"></param>
 59     /// <param name="headers"></param>
 60     /// <param name="contentType"></param>
 61     /// <returns></returns>
 62     public static string HttpGet(string url, Dictionary<string, string> headers = null)
 63     {
 64         using HttpClient client = new HttpClient();
 65         if (headers != null)
 66         {
 67             foreach (var header in headers)
 68                 client.DefaultRequestHeaders.Add(header.Key, header.Value);
 69         }
 70         else
 71         {
 72             client.DefaultRequestHeaders.Add("ContentType", "application/x-www-form-urlencoded");
 73             client.DefaultRequestHeaders.Add("UserAgent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; .NET CLR 1.0.3705;)");
 74         }
 75         try
 76         {
 77             HttpResponseMessage response = client.GetAsync(url).Result;
 78             return response.Content.ReadAsStringAsync().Result;
 79         }
 80         catch (Exception ex)
 81         {
 82             //TODO 打印日志
 83             Console.WriteLine($"[Http请求出错]{url}|{ex.Message}");
 84         }
 85         return "";
 86     }
 87 
 88     /// <summary>
 89     /// 发起GET异步请求
 90     /// </summary>
 91     /// <param name="url"></param>
 92     /// <param name="headers"></param>
 93     /// <returns></returns>
 94     public static async Task<string> HttpGetAsync(string url, Dictionary<string, string> headers = null)
 95     {
 96         using HttpClient client = new HttpClient();
 97         if (headers != null)
 98         {
 99             foreach (var header in headers)
100                 client.DefaultRequestHeaders.Add(header.Key, header.Value);
101         }
102         HttpResponseMessage response = await client.GetAsync(url);
103         return await response.Content.ReadAsStringAsync();
104     }
105 
106     /// <summary>
107     /// 发起Put同步请求
108     /// </summary>
109     /// <param name="url"></param>
110     /// <param name="postData"></param>
111     /// <param name="contentType">application/xml、application/json、application/text、application/x-www-form-urlencoded</param>
112     /// <param name="headers">填充消息头</param>        
113     /// <returns></returns>
114     public static string HttpPut(string url, string postData = null, string contentType = null, int timeOut = 30, Dictionary<string, string> headers = null)
115     {
116         postData ??= "";
117         using HttpClient client = new HttpClient();
118         client.Timeout = new TimeSpan(0, 0, timeOut);
119         if (headers != null)
120         {
121             foreach (var header in headers)
122                 client.DefaultRequestHeaders.Add(header.Key, header.Value);
123         }
124         using HttpContent httpContent = new StringContent(postData, Encoding.UTF8);
125         if (contentType != null)
126             httpContent.Headers.ContentType = new System.Net.Http.Headers.MediaTypeHeaderValue(contentType);
127 
128         HttpResponseMessage response = client.PutAsync(url, httpContent).Result;
129         return response.Content.ReadAsStringAsync().Result;
130     }
131 }