ASP.NET Core使用HttpClient的同步和异步请求

using System;using System.Collections.Generic;using System.Net.Http;using System.Text;using System.Threading.Tasks;namespace NetCoreOrder.Common{ ???public class HttpHelper ???{ ???????/// <summary> ???????/// 同步GET请求 ???????/// </summary> ???????/// <param name="url"></param> ???????/// <param name="headers"></param> ???????/// <param name="timeout">请求响应超时时间，单位/s(默认100秒)</param> ???????/// <returns></returns> ???????public static string HttpGet(string url, Dictionary<string, string> headers = null, int timeout = 0) ???????{ ???????????using (HttpClient client = new HttpClient()) ???????????{ ???????????????if (headers != null) ???????????????{ ???????????????????foreach (KeyValuePair<string, string> header in headers) ???????????????????{ ???????????????????????client.DefaultRequestHeaders.Add(header.Key, header.Value); ???????????????????} ???????????????} ???????????????if (timeout > 0) ???????????????{ ???????????????????client.Timeout = new TimeSpan(0, 0, timeout); ???????????????} ???????????????Byte[] resultBytes = client.GetByteArrayAsync(url).Result; ???????????????return Encoding.UTF8.GetString(resultBytes); ???????????} ???????} ???????/// <summary> ???????/// 异步GET请求 ???????/// </summary> ???????/// <param name="url"></param> ???????/// <param name="headers"></param> ???????/// <param name="timeout">请求响应超时时间，单位/s(默认100秒)</param> ???????/// <returns></returns> ???????public static async Task<string> HttpGetAsync(string url, Dictionary<string, string> headers = null, int timeout = 0) ???????{ ???????????using (HttpClient client = new HttpClient()) ???????????{ ???????????????if (headers != null) ???????????????{ ???????????????????foreach (KeyValuePair<string, string> header in headers) ???????????????????{ ???????????????????????client.DefaultRequestHeaders.Add(header.Key, header.Value); ???????????????????} ???????????????} ???????????????if (timeout > 0) ???????????????{ ???????????????????client.Timeout = new TimeSpan(0, 0, timeout); ???????????????} ???????????????Byte[] resultBytes = await client.GetByteArrayAsync(url); ???????????????return Encoding.Default.GetString(resultBytes); ???????????} ???????} ???????/// <summary> ???????/// 同步POST请求 ???????/// </summary> ???????/// <param name="url"></param> ???????/// <param name="postData"></param> ???????/// <param name="headers"></param> ???????/// <param name="contentType"></param> ???????/// <param name="timeout">请求响应超时时间，单位/s(默认100秒)</param> ???????/// <param name="encoding">默认UTF8</param> ???????/// <returns></returns> ???????public static string HttpPost(string url, string postData, Dictionary<string, string> headers = null, string contentType = null, int timeout = 0, Encoding encoding = null) ???????{ ???????????using (HttpClient client = new HttpClient()) ???????????{ ???????????????if (headers != null) ???????????????{ ???????????????????foreach (KeyValuePair<string, string> header in headers) ???????????????????{ ???????????????????????client.DefaultRequestHeaders.Add(header.Key, header.Value); ???????????????????} ???????????????} ???????????????if (timeout > 0) ???????????????{ ???????????????????client.Timeout = new TimeSpan(0, 0, timeout); ???????????????} ???????????????using (HttpContent content = new StringContent(postData ?? "", encoding ?? Encoding.UTF8)) ???????????????{ ???????????????????if (contentType != null) ???????????????????{ ???????????????????????content.Headers.ContentType = new System.Net.Http.Headers.MediaTypeHeaderValue(contentType); ???????????????????} ???????????????????using (HttpResponseMessage responseMessage = client.PostAsync(url, content).Result) ???????????????????{ ???????????????????????Byte[] resultBytes = responseMessage.Content.ReadAsByteArrayAsync().Result; ???????????????????????return Encoding.UTF8.GetString(resultBytes); ???????????????????} ???????????????} ???????????} ???????} ???????/// <summary> ???????/// 异步POST请求 ???????/// </summary> ???????/// <param name="url"></param> ???????/// <param name="postData"></param> ???????/// <param name="headers"></param> ???????/// <param name="contentType"></param> ???????/// <param name="timeout">请求响应超时时间，单位/s(默认100秒)</param> ???????/// <param name="encoding">默认UTF8</param> ???????/// <returns></returns> ???????public static async Task<string> HttpPostAsync(string url, string postData, Dictionary<string, string> headers = null, string contentType = null, int timeout = 0, Encoding encoding = null) ???????{ ???????????using (HttpClient client = new HttpClient()) ???????????{ ???????????????if (headers != null) ???????????????{ ???????????????????foreach (KeyValuePair<string, string> header in headers) ???????????????????{ ???????????????????????client.DefaultRequestHeaders.Add(header.Key, header.Value); ???????????????????} ???????????????} ???????????????if (timeout > 0) ???????????????{ ???????????????????client.Timeout = new TimeSpan(0, 0, timeout); ???????????????} ???????????????using (HttpContent content = new StringContent(postData ?? "", encoding ?? Encoding.UTF8)) ???????????????{ ???????????????????if (contentType != null) ???????????????????{ ???????????????????????content.Headers.ContentType = new System.Net.Http.Headers.MediaTypeHeaderValue(contentType); ???????????????????} ???????????????????using (HttpResponseMessage responseMessage = await client.PostAsync(url, content)) ???????????????????{ ???????????????????????Byte[] resultBytes = await responseMessage.Content.ReadAsByteArrayAsync(); ???????????????????????return Encoding.UTF8.GetString(resultBytes); ???????????????????} ???????????????} ???????????} ???????} ???}}