本文实例讲述了C#模拟Http与Https请求框架类。分享给大家供大家参考。
具体实现方法如下：
using System.Text;
using System.Net;
using System.IO;
using System.Text.RegularExpressions;
using System.Security.Cryptography.X509Certificates;
using System.Net.Security;
namespace WebRequestTest
{
/// <summary>
/// 动态类，每个实例使用单独session
/// </summary>
public class HttpHelperNew
{
public CookieContainer cookie = new CookieContainer();
/// <summary>
/// post请求返回html
/// </summary>
/// <param name="Url"></param>
/// <param name="postDataStr"></param>
/// <returns></returns>
public string HttpPost(string Url, string postDataStr)
{
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url);
//request.AllowAutoRedirect = false; //禁止自动重定向
request.Method = "POST";
request.ContentType = "application/x-www-form-urlencoded";
request.ContentLength = Encoding.UTF8.GetByteCount(postDataStr);
request.CookieContainer = cookie; //cookie信息由CookieContainer自行维护
Stream myRequestStream = request.GetRequestStream();
StreamWriter myStreamWriter = new StreamWriter(myRequestStream, Encoding.GetEncoding("gb2312"));
myStreamWriter.Write(postDataStr);
myStreamWriter.Close();
HttpWebResponse response = null;
try
{
this.SetCertificatePolicy();
response = (HttpWebResponse)request.GetResponse();
}
catch (System.Exception ex)
{
}
//获取重定向地址
//string url1 = response.Headers["Location"];
if (response !=null)
{
Stream myResponseStream = response.GetResponseStream();
StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.GetEncoding("utf-8"));
string retString = myStreamReader.ReadToEnd();
myStreamReader.Close();
myResponseStream.Close();
return retString;
}
else
{
return "error"; //post请求返回为空
}
}
/// <summary>
/// get请求获取返回的html
/// </summary>
/// <param name="Url"></param>
/// <param name="postDataStr"></param>
/// <returns></returns>
public string HttpGet(string Url, string Querydata)
{
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url + (Querydata == "" ? "" : "?") + Querydata);
request.Method = "GET";
request.ContentType = "text/html;charset=UTF-8";
request.CookieContainer = cookie;
this.SetCertificatePolicy();
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
// response.Cookies = cookie.GetCookies(response.ResponseUri);
Stream myResponseStream = response.GetResponseStream();
StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.GetEncoding("utf-8"));
string retString = myStreamReader.ReadToEnd();
myStreamReader.Close();
myResponseStream.Close();
return retString;
}
/// <summary>
/// 获得响应中的图像
/// </summary>
&nb