背景

在开发微信应用时，会经常在C#服务端以Http的GET或POST方式请求钉钉平台或微信平台的接口，为了方便发起请求，同时避免引入其他的dll，本人自己编写了一个发送http请求的类，封装了常规的get和post操作，并且不依赖任何其他的dll，很底层~，也很原生。

代码实现

HttpRequest代码如下：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Net;namespace Mesnac.WebChat.Util
{/// <summary>/// Http请求封装类，封装常用的Get，Post请求方法/// </summary>public class HttpRequest{/// <summary>/// 向指定URL发送GET方法的请求/// </summary>/// <param name="url">发送请求的URL</param>/// <param name="param">请求参数，请求参数应该是 name1=value1&name2=value2 的形式。</param>/// <returns>所代表远程资源的响应结果</returns>public static string SendGet(string url, string param){string result = String.Empty;StreamReader reader = null;try{string urlNameString = url + "?" + param;HttpWebRequest request = (HttpWebRequest)WebRequest.Create(urlNameString);request.Method = "GET";request.ContentType = "text/html;charset=UTF-8";request.Accept = "*/*";request.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)";HttpWebResponse response = (HttpWebResponse)request.GetResponse();Stream responseStream = response.GetResponseStream();reader = new StreamReader(responseStream, Encoding.GetEncoding("utf-8"));result = reader.ReadToEnd();reader.Close();responseStream.Close();response.Close();reader = null;responseStream = null;response = null;}catch (Exception ex){Console.WriteLine("发送GET请求出现异常：" + ex.Message);}finally{if (reader != null){reader.Close();}}return result;}/// <summary>/// 向指定URL发送GET方法的请求/// </summary>/// <param name="url">发送请求的URL</param>/// <param name="param">请求参数，请求参数应该是 name1=value1&name2=value2 的形式。</param>/// <param name="encoding">设置响应信息的编码格式，如utf-8</param>/// <returns>所代表远程资源的响应结果</returns>public static string SendGet(string url, string param, string encoding){string result = String.Empty;StreamReader reader = null;try{string urlNameString = url + "?" + param;HttpWebRequest request = (HttpWebRequest)WebRequest.Create(urlNameString);request.Method = "GET";request.ContentType = "text/html;charset=" + encoding;request.Accept = "*/*";request.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)";HttpWebResponse response = (HttpWebResponse)request.GetResponse();Stream responseStream = response.GetResponseStream();reader = new StreamReader(responseStream, Encoding.GetEncoding(encoding));result = reader.ReadToEnd();reader.Close();responseStream.Close();response.Close();reader = null;responseStream = null;response = null;}catch (Exception ex){Console.WriteLine("发送GET请求出现异常：" + ex.Message);}finally{if (reader != null){reader.Close();}}return result;}/// <summary>/// 向指定 URL 发送POST方法的请求/// </summary>/// <param name="url">发送请求的 URL</param>/// <param name="jsonData">请求参数，请求参数应该是Json格式字符串的形式。</param>/// <returns>所代表远程资源的响应结果</returns>public static string SendPost(string url, string jsonData){string result = String.Empty;try{CookieContainer cookie = new CookieContainer();HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);request.Method = "POST";request.Headers.Add("x-requested-with", "XMLHttpRequest");request.ServicePoint.Expect100Continue = false;request.ContentType = "application/x-www-form-urlencoded";request.Accept = "*/*";request.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)";request.ContentLength = Encoding.UTF8.GetByteCount(jsonData);request.CookieContainer = cookie;using (StreamWriter writer = new StreamWriter(request.GetRequestStream())){writer.Write(jsonData);}HttpWebResponse response = (HttpWebResponse)request.GetResponse();response.Cookies = cookie.GetCookies(response.ResponseUri);using (Stream responseStream = response.GetResponseStream()){using (StreamReader reader = new StreamReader(responseStream)){result = reader.ReadToEnd();reader.Close();}responseStream.Close();}response.Close();response = null;request = null;}catch (Exception ex){Console.WriteLine("发送GET请求出现异常：" + ex.Message);}return result;}/// <summary>/// 向指定 URL 发送POST方法的请求/// </summary>/// <param name="url">发送请求的 URL</param>/// <param name="jsonData">请求参数，请求参数应该是Json格式字符串的形式。</param>/// <param name="encoding">设置响应信息的编码格式，如utf-8</param>/// <returns>所代表远程资源的响应结果</returns>public static string SendPost(string url, string jsonData, string encoding){string result = String.Empty;try{CookieContainer cookie = new CookieContainer();HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);request.Method = "POST";request.Headers.Add("x-requested-with", "XMLHttpRequest");request.ServicePoint.Expect100Continue = false;request.ContentType = "application/x-www-form-urlencoded";request.Accept = "*/*";request.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)";request.ContentLength = Encoding.UTF8.GetByteCount(jsonData);request.CookieContainer = cookie;using (StreamWriter writer = new StreamWriter(request.GetRequestStream(), Encoding.GetEncoding(encoding))){writer.Write(jsonData);}HttpWebResponse response = (HttpWebResponse)request.GetResponse();response.Cookies = cookie.GetCookies(response.ResponseUri);using (Stream responseStream = response.GetResponseStream()){using (StreamReader reader = new StreamReader(responseStream, Encoding.GetEncoding(encoding))){result = reader.ReadToEnd();reader.Close();}responseStream.Close();}response.Close();response = null;request = null;}catch (Exception ex){Console.WriteLine("发送GET请求出现异常：" + ex.Message);}return result;}/// <summary>/// 上传媒体文件/// </summary>/// <param name="url">上传媒体文件的微信公众平台接口地址</param>/// <param name="file">要上传的媒体文件对象</param>/// <returns>返回上传的响应结果，详情参看微信公众平台开发者接口文档</returns>public static string UploadPost(string url, string file){string result = String.Empty;try{WebClient client = new WebClient();client.Credentials = CredentialCache.DefaultCredentials;byte[] responseArray = client.UploadFile(url, "POST", file);result = System.Text.Encoding.Default.GetString(responseArray, 0, responseArray.Length);Console.WriteLine("上传result:" + result);}catch (Exception ex){result = "Error:" + ex.Message;Console.WriteLine("发送GET请求出现异常：" + ex.Message);}finally{Console.WriteLine("上传MediaId:" + result);}return result;}public static bool DownloadFile(string url, string param, string outFileName){bool result = false;FileStream fs = null;try{string urlNameString = url + "?" + param;HttpWebRequest request = (HttpWebRequest)WebRequest.Create(urlNameString);request.Method = "GET";request.ContentType = "text/html;charset=UTF-8";request.Accept = "*/*";request.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)";HttpWebResponse response = (HttpWebResponse)request.GetResponse();Stream responseStream = response.GetResponseStream();fs = new FileStream(outFileName, FileMode.Create);int bufferSize = 2048;byte[] data = new byte[bufferSize];int length = 0;while((length = responseStream.Read(data, 0, bufferSize)) > 0){fs.Write(data, 0, length);}fs.Close();responseStream.Close();response.Close();fs = null;responseStream = null;response = null;result = true;}catch (Exception ex){Console.WriteLine("下载媒体文件时出现异常：" + ex.Message);Mesnac.Log.LogService.Instance.Error("下载媒体文件时出现异常：" + ex.Message);}finally{if (fs != null){fs.Close();}}return result;}}
}

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C#实现http的GET/POST请求封装类-HttpRequest

C#实现http的GET/POST请求封装类-HttpRequest

背景

代码实现

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