Yuebon.NetCore/Yuebon.Commons/Helpers/HttpRequestHelper.cs

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using System;
using System.Collections.Generic;
using System.IO;
using System.Net;
using System.Net.Http;
using System.Text;
using System.Threading.Tasks;
using Newtonsoft.Json;

namespace Yuebon.Commons.Helpers
{
    /// <summary>
    /// http请求类
    /// </summary>
    public static class HttpRequestHelper
    {
        static readonly HttpClient client = new HttpClient();      

        /// <summary>
        /// 使用Get方法获取字符串结果
        /// </summary>
        /// <param name="url"></param>
        /// <param name="encoding"></param>
        /// <param name="timeOut"></param>
        /// <returns></returns>
        public static async Task<string> HttpGet(string url, Encoding encoding = null, int timeOut = 60000)
        {
            HttpResponseMessage response = await client.GetAsync(url);
            using (Stream responseStream = response.Content.ReadAsStream())
            {
                using (StreamReader myStreamReader = new StreamReader(responseStream, encoding ?? Encoding.GetEncoding("utf-8")))
                {
                    string retString = myStreamReader.ReadToEnd();
                    return retString;
                }
            }
        }

        /// <summary>
        /// 使用Post方法获取字符串结果，常规提交
        /// </summary>
        /// <returns></returns>
        public static string HttpPost(string url, Dictionary<string, string> formData = null, Encoding encoding = null, int timeOut = 60000, Dictionary<string, string> headers = null)
        {
            MemoryStream ms = new MemoryStream();
            formData.FillFormDataStream(ms);//填充formData
            return HttpPost(url, ms, "application/x-www-form-urlencoded", encoding, headers, timeOut);
        }

        /// <summary>
        /// 发送HttpPost请求，使用JSON格式传输数据
        /// </summary>
        /// <param name="url"></param>
        /// <param name="postData"></param>
        /// <param name="encoding"></param>
        /// <param name="headers"></param>
        /// <returns></returns>
        public static string HttpPost(string url, string postData, Encoding encoding = null, Dictionary<string, string> headers = null)
        {
            if (encoding == null)