c# 查询本机可用的代理ip
作者：互联网
现在有很多网站都提供免费的代理ip，但是你会发现很多网站显示的可以用的 ，在自己电脑上是用不了，写个小代码提取出自己电脑上可以用的代理，没什么技术含量，只是为了记录一下
string strUrl = "https://www.xicidaili.com/nt/";
HttpHelper httpProxy = new HttpHelper();
for (int i = 1; i <= 728; i++)
{
string strHtml = httpProxy.Get_Request(strUrl + i, httpProxy.cookie, "www.xicidaili.com", "https://www.xicidaili.com/nt/", blnHttps: true, strAccept: "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3", strUserAgent: "Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/73.0.3683.86 Safari/537.36");
HtmlAgilityPack.HtmlDocument docList = new HtmlAgilityPack.HtmlDocument();
docList.LoadHtml(strHtml);
var trListNodes = docList.DocumentNode.SelectNodes("//*[@id=\"ip_list\"]/tr");
for (int j = 1; j < trListNodes.Count; j++)
{
var trNode = trListNodes[j];
string strIp = trNode.SelectSingleNode("td[2]").InnerText.Trim();
string strPort = trNode.SelectSingleNode("td[3]").InnerText.Trim();
int intPort = int.Parse(strPort);
try
{
WebProxy proxyObject = new WebProxy(strIp, intPort);// port为端口号 整数型
HttpWebRequest Req = WebRequest.Create("http://www.bookschina.com") as HttpWebRequest;
Req.Proxy = proxyObject; //设置代理
Req.Timeout = 2000; //超时
DateTime dt = DateTime.Now;
var Resp = (HttpWebResponse)Req.GetResponse();
Encoding bin = Encoding.GetEncoding("gb2312");
StreamReader sr = new StreamReader(Resp.GetResponseStream(), bin);
string str = sr.ReadToEnd();
sr.Close();
sr.Dispose();
var time = (DateTime.Now - dt).TotalMilliseconds;
Console.WriteLine(strIp + " " + intPort + " " + time);
}
catch
{ }
}
}
View Code
HttpHelper
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Net.Security;
using System.Security.Cryptography.X509Certificates;
using System.Text;
using System.Threading.Tasks;
namespace TestProxy
{
public class HttpHelper
{
public CookieContainer cookie;
public HttpHelper()
{
cookie = new CookieContainer();
}
private static bool CheckValidationResult(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors)
{
return true; //总是接受
}
public string Get_Request(
string strUrl,
CookieContainer _cookie = null,
string strHost = "",
string strRefer = "",
string strOrigin = "",
Dictionary<string, string> lstHeads = null,
string strEncoding = "utf-8",
string strContentType = "",
string strAccept = "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8",
string strUserAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.101 Safari/537.36",
bool blnAllowAutoRedirect = true,
int intTimeout = 1000 * 30,
bool blnHttps = false,
System.Net.WebProxy proxy = null)
{
HttpWebRequest request;
HttpWebResponse response;
request = (HttpWebRequest)WebRequest.Create(strUrl);
request.Accept = strAccept;
request.Timeout = intTimeout;
request.Method = "GET";
request.Credentials = CredentialCache.DefaultCredentials;
request.UserAgent = strUserAgent;
request.AllowAutoRedirect = blnAllowAutoRedirect;
if (blnHttps)
{
ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback(CheckValidationResult);
request.ProtocolVersion = HttpVersion.Version10;
ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;
}
if (!string.IsNullOrEmpty(strContentType))
{
request.ContentType = strContentType;
}
if (_cookie != null)
{
request.CookieContainer = _cookie;
}
if (!string.IsNullOrEmpty(strHost))
{
request.Host = strHost;
}
if (!string.IsNullOrEmpty(strRefer))
{
request.Referer = strRefer;
}
if (!string.IsNullOrEmpty(strOrigin))
{
request.Headers.Add("Origin", strOrigin);
}
if (lstHeads != null && lstHeads.Count > 0)
{
foreach (var item in lstHeads)
{
request.Headers.Add(item.Key, item.Value);
}
}
if (proxy != null)
request.Proxy = proxy;
response = (HttpWebResponse)request.GetResponse();
var sr = new StreamReader(response.GetResponseStream(), Encoding.GetEncoding(strEncoding));
string strResult = sr.ReadToEnd();
sr.Close();
request.Abort();
response.Close();
return strResult;
}
public string POST_Request(
string strUrl,
string postDataStr,
CookieContainer _cookie = null,
string strHost = "",
string strRefer = "",
string strOrigin = "",
Dictionary<string, string> lstHeads = null,
string strEncoding = "utf-8",
string strContentType = "",
string strAccept = "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8",
string strUserAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.101 Safari/537.36",
bool blnAllowAutoRedirect = true,
int intTimeout = 1000 * 30,
bool blnHttps = false,
System.Net.WebProxy proxy = null)
{
HttpWebRequest request;
HttpWebResponse response;
request = (HttpWebRequest)WebRequest.Create(strUrl);
request.Accept = strAccept;
request.Timeout = intTimeout;
request.Method = "POST";
request.Host = strHost;
request.UserAgent = strUserAgent;
if (_cookie != null)
{
request.CookieContainer = _cookie;
}
if (blnHttps)
{
ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback(CheckValidationResult);
request.ProtocolVersion = HttpVersion.Version10;
ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;
}
request.AllowAutoRedirect = blnAllowAutoRedirect;
if (!string.IsNullOrEmpty(strContentType))
{
request.ContentType = strContentType;
}
if (!string.IsNullOrEmpty(strOrigin))
{
request.Headers.Add("Origin", strOrigin);
}
if (!string.IsNullOrEmpty(strRefer))
{
request.Referer = strRefer;
}
if (!string.IsNullOrEmpty(strHost))
{
request.Host = strHost;
}
if (lstHeads != null && lstHeads.Count > 0)
{
foreach (var item in lstHeads)
{
request.Headers.Add(item.Key, item.Value);
}
}
if (!string.IsNullOrEmpty(postDataStr))
{
request.ContentLength = postDataStr.Length;
Stream myRequestStream = request.GetRequestStream();
StreamWriter myStreamWriter = new StreamWriter(myRequestStream);
myStreamWriter.Write(postDataStr);
myStreamWriter.Close();
}
if (proxy != null)
request.Proxy = proxy;
response = (HttpWebResponse)request.GetResponse();
var sr = new StreamReader(response.GetResponseStream(), Encoding.GetEncoding(strEncoding));
string strResult = sr.ReadToEnd();
sr.Close();
request.Abort();
response.Close();
return strResult;
}
public string DownloadFile(
string strURLAddress,
string strPath,
CookieContainer _cookie = null,
string strHost = "",
string strRefer = "",
string strOrigin = "",
Dictionary<string, string> lstHeads = null,
string strAccept = "",
string strUserAgent = "",
bool blnHttps = false,
System.Net.WebProxy proxy = null)
{
try
{
// 设置参数
HttpWebRequest request = WebRequest.Create(strURLAddress) as HttpWebRequest;
if (!string.IsNullOrEmpty(strAccept))
{
request.Accept = strAccept;
}
if (blnHttps)
{
ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback(CheckValidationResult);
request.ProtocolVersion = HttpVersion.Version10;
ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;
}
if (!string.IsNullOrEmpty(strUserAgent))
{
request.UserAgent = strUserAgent;
}
if (_cookie != null)
{
request.CookieContainer = _cookie;
}
if (!string.IsNullOrEmpty(strOrigin))
{
request.Headers.Add("Origin", strOrigin);
}
if (!string.IsNullOrEmpty(strRefer))
{
request.Referer = strRefer;
}
if (!string.IsNullOrEmpty(strHost))
{
request.Host = strHost;
}
if (lstHeads != null && lstHeads.Count > 0)
{
foreach (var item in lstHeads)
{
request.Headers.Add(item.Key, item.Value);
}
}
if (proxy != null)
request.Proxy = proxy;
request.Timeout = 2000;
//发送请求并获取相应回应数据
HttpWebResponse response = request.GetResponse() as HttpWebResponse;
string strReceivePath = string.Empty;
//直到request.GetResponse()程序才开始向目标网页发送Post请求
Stream responseStream = response.GetResponseStream();
//创建本地文件写入流
Stream stream = new FileStream(strPath, FileMode.Create);
byte[] bArr = new byte[1024];
int size = responseStream.Read(bArr, 0, (int)bArr.Length);
while (size > 0)
{
stream.Write(bArr, 0, size);
stream.Flush();
size = responseStream.Read(bArr, 0, (int)bArr.Length);
}
stream.Close();
responseStream.Close();
return strPath;
}
catch (Exception ex)
{
return "";
}
}
}
}
View Code
这个需要.net 4.5
标签：lstHeads,string,c#,ip,request,System,查询,IsNullOrEmpty,null 来源： https://www.cnblogs.com/bfyx/p/10734401.html