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
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
{
/// 所代表远程资源的响应结果
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;
}
/// 所代表远程资源的响应结果
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;
}
/// 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
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;
}
}
}