|  |  | 
 |  |  | { | 
 |  |  |     public class HttpHelper | 
 |  |  |     { | 
 |  |  |         public static async Task<string> GetAsync(string serviceAddress, string contentType = "application/json", Dictionary<string, string>? headers = null) | 
 |  |  |         public static async Task<string> GetAsync(string serviceAddress, Dictionary<string, string>? headers = null) | 
 |  |  |         { | 
 |  |  |             string result = string.Empty; | 
 |  |  |             DateTime beginDate = DateTime.Now; | 
 |  |  | 
 |  |  |             { | 
 |  |  |                 using HttpClient httpClient = new HttpClient(); | 
 |  |  |                 httpClient.Timeout = new TimeSpan(0, 0, 60); | 
 |  |  |  | 
 |  |  |                  | 
 |  |  |                 if (headers != null) | 
 |  |  |                 { | 
 |  |  |                     foreach (var header in headers) | 
 |  |  | 
 |  |  |             } | 
 |  |  |         } | 
 |  |  |  | 
 |  |  |         public static async Task<string?> PostAsync(string serviceAddress, string requestJson = null, string contentType = "application/json", Dictionary<string, string>? headers = null) | 
 |  |  |         public static async Task<string?> PostAsync(string serviceAddress, string requestJson = "", string contentType = "application/json", Dictionary<string, string>? headers = null) | 
 |  |  |         { | 
 |  |  |             string result = string.Empty; | 
 |  |  |             DateTime beginDate = DateTime.Now; | 
 |  |  | 
 |  |  |             } | 
 |  |  |             finally | 
 |  |  |             { | 
 |  |  |                 Logger.Add(serviceAddress, requestJson == null ? "" : requestJson, result, beginDate); | 
 |  |  |                 Logger.Add(serviceAddress, requestJson, result, beginDate); | 
 |  |  |             } | 
 |  |  |         } | 
 |  |  |  | 
 |  |  | 
 |  |  |             } | 
 |  |  |         } | 
 |  |  |  | 
 |  |  |         public static string Post(string serviceAddress, string requestJson = null, string contentType = "application/json", Dictionary<string, string>? headers = null) | 
 |  |  |         public static string Post(string serviceAddress, string requestJson = "", string contentType = "application/json", Dictionary<string, string>? headers = null) | 
 |  |  |         { | 
 |  |  |             string result = string.Empty; | 
 |  |  |             DateTime beginDate = DateTime.Now; | 
 |  |  | 
 |  |  |             } | 
 |  |  |             finally | 
 |  |  |             { | 
 |  |  |                 Logger.Add(serviceAddress, requestJson == null ? "" : requestJson, result, beginDate); | 
 |  |  |                 Logger.Add(serviceAddress, requestJson, result, beginDate); | 
 |  |  |             } | 
 |  |  |         } | 
 |  |  |     } |