326 lines
11 KiB
C#
326 lines
11 KiB
C#
using System;
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using System.Collections;
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using System.Diagnostics;
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using System.IO;
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using System.Net;
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using System.Net.Security;
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using System.Net.Sockets;
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using System.Security.Authentication;
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using System.Security.Cryptography.X509Certificates;
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using System.Text;
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using System.Text.RegularExpressions;
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using System.Threading;
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/************************************************************************/
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/* Author:huliang
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* Email:huliang@yahoo.cn
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* QQ:12658501
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* 说明：转载请注明出处
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/************************************************************************/
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namespace EnAliKeywordSearch
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{
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public class HttpArgs
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{
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public string Url { get; set; }
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public string Host { get; set; }
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public int Port { get; set; }
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public string Accept { get; set; }
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public string Referer { get; set; }
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public string Cookie { get; set; }
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public string Data { get; set; }
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public string UA { get; set; }
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}
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public static class HttpHelper
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{
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/// <summary>
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/// 提交方法
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/// </summary>
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enum HttpMethod
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{
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GET,
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POST
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}
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#region HttpWebRequest & HttpWebResponse
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/// <summary>
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/// Get方法
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/// </summary>
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/// <param name="geturl">请求地址</param>
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/// <param name="cookieser">Cookies存储器</param>
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/// <returns>请求返回的Stream</returns>
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public static string Get(string url)
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{
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HttpArgs args = ParseURL(url);
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string strhtml = InternalSocketHttp(args, HttpMethod.GET);
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return strhtml;
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}
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/// <summary>
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/// Post方法
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/// </summary>
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/// <param name="posturl">请求地址</param>
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/// <param name="bytes">Post数据</param>
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/// <param name="cookieser">Cllkies存储器</param>
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/// <returns>请求返回的流</returns>
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public static string Post(string url,
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byte[] bytes,
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CookieContainer cookies,
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Encoding encoding)
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{
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return null;
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}
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/// <summary>
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/// 根据Url得到host
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/// </summary>
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/// <param name="strUrl">url字符串</param>
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/// <returns>host字符串</returns>
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private static HttpArgs ParseURL(string strUrl)
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{
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HttpArgs args = new HttpArgs();
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args.Host = "";
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args.Port = 80;
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args.Referer = "";
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args.Cookie = "";
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args.Url = "";
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args.Accept = "text/html";//,application/xhtml+xml,application/xml,application/json;";
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args.UA = "Mozilla/5.0+(Compatible;+Baiduspider/2.0;++http://www.baidu.com/search/spider.html)";
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//http://www.alibaba.com/products/Egg_Laying_Block_Machine/1.html
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int iIndex = strUrl.IndexOf(@"//");
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if (iIndex <= 0)
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return null;
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//www.alibaba.com:80/products/Egg_Laying_Block_Machine/1.html
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string nohttpurl = strUrl.Substring(iIndex + 2);
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string address = nohttpurl;
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iIndex = nohttpurl.IndexOf(@"/");
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if (iIndex > 0)
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{
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//www.alibaba.com:80
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address = nohttpurl.Substring(0, iIndex);
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args.Url = nohttpurl.Substring(iIndex);
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}
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iIndex = nohttpurl.IndexOf(@":");
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if (iIndex > 0)
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{
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string[] tempargs = nohttpurl.Trim().Split(char.Parse(":"));
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args.Host = tempargs[0];
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args.Port = int.Parse(tempargs[1]);
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}
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else
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{
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//www.alibaba.com:80
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args.Host = address;
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args.Port = 80;
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}
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return args;
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}
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#endregion
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#region Socket
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public static string Get(HttpArgs args)
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{
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return InternalSocketHttp(args, HttpMethod.GET);
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}
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public static string Post(IPEndPoint endpoint,
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HttpArgs args)
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{
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return InternalSocketHttp(args, HttpMethod.POST);
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}
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static string InternalSocketHttp(HttpArgs args, HttpMethod method)
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{
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using (Socket sK = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp))
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{
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try
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{
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sK.Connect(args.Host, args.Port);
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if (sK.Connected)
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{
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byte[] buff = ParseHttpArgs(method, args);
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if (sK.Send(buff) > 0)
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{
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string html = ParseResponse(sK, args);
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return html;
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}
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}
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}
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catch (Exception ex)
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{
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Console.WriteLine(ex.Message);
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}
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}
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return null;
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}
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private static string ParseResponse(Socket sK, HttpArgs args)
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{
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string header = ReadHeaderProcess(sK);
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if (header.StartsWith("HTTP/1.1 400 Bad Request"))
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{
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return string.Empty;
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}
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if (header.StartsWith("HTTP/1.1 302"))
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{
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int start = header
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.ToUpper().IndexOf("LOCATION");
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if (start > 0)
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{
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string temp = header.Substring(start, header.Length - start);
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string[] sArry = Regex.Split(temp, "\r\n");
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args.Url = sArry[0].Remove(0, 10);
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return Get(args); //注意：302协议需要重定向
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}
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}
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else if (header.StartsWith("HTTP/1.1 200")) //继续读取内容
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{
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int start = header.ToUpper().IndexOf("CONTENT-LENGTH");
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int content_length = 0;
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if (start > 0)
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{
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string temp = header.Substring(start, header.Length - start);
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string[] sArry = Regex.Split(temp, "\r\n");
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content_length = Convert.ToInt32(sArry[0].Split(':')[1]);
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if (content_length > 0)
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{
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byte[] bytes = new byte[content_length];
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if (sK.Receive(bytes) > 0)
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{
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return Encoding.Default.GetString(bytes);
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}
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}
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}
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else
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{
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//不存在Content-Length协议头
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return ParseResponse(sK);
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}
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}
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return string.Empty;
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}
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/// <summary>
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/// 读取协议头
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/// </summary>
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/// <param name="args"></param>
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/// <returns></returns>
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static string ReadHeaderProcess(Socket sK)
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{
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StringBuilder bulider = new StringBuilder();
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while (true)
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{
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byte[] buff = new byte[1];
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int read = sK.Receive(buff, SocketFlags.None);
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if (read > 0)
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{
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bulider.Append((char)buff[0]);
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}
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string temp = bulider.ToString();
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if (temp.Contains("\r\n\r\n") || temp.Contains("</html>"))
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{
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break;
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}
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}
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return bulider.ToString();
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}
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/// <summary>
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/// 注意：此函数可能产生死循环
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/// </summary>
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/// <param name="ssl"></param>
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/// <returns></returns>
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static string ParseResponse(Socket sK)
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{
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StringBuilder bulider = new StringBuilder();
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byte[] buff = new byte[1024];
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int len = sK.Receive(buff);
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string temp = string.Empty;
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while (len > 0)
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{
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byte[] reads = new byte[len];
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Array.Copy(buff, 0, reads, 0, len);
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bulider.Append(Encoding.Default.GetString(reads));
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temp = bulider.ToString();
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if (temp.ToUpper().Contains("</HTML>") || temp.Contains("\0"))
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{
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break;
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}
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len = sK.Receive(buff);
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}
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return temp;
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}
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#endregion
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#region Helper
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static byte[] ParseHttpArgs(HttpMethod method, HttpArgs args)
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{
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StringBuilder bulider = new StringBuilder();
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if (method.Equals(HttpMethod.POST))
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{
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bulider.AppendLine(string.Format("POST {0} HTTP/1.1", args.Url));
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bulider.AppendLine("Content-Type: application/x-www-form-urlencoded");
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}
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else
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{
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bulider.AppendLine(string.Format("GET {0} HTTP/1.1", args.Url));
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}
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bulider.AppendLine(string.Format("Host: {0}:{1}", args.Host, args.Port));
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bulider.AppendLine("User-Agent: " + args.UA);
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//"User-Agent: Mozilla/5.0+(Compatible;+Baiduspider/2.0;++http://www.baidu.com/search/spider.html)";Mozilla/5.0 (Windows NT 6.1; IE 9.0)
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if (!string.IsNullOrEmpty(args.Referer))
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bulider.AppendLine(string.Format("Referer: {0}", args.Referer));
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//bulider.AppendLine("Connection: close");
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if (!string.IsNullOrEmpty(args.Accept))
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bulider.AppendLine(string.Format("Accept: {0}", args.Accept));
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if (!string.IsNullOrEmpty(args.Cookie))
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bulider.AppendLine(string.Format("Cookie: {0}", args.Cookie));
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if (method.Equals(HttpMethod.POST))
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{
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bulider.AppendLine(string.Format("Content-Length: {0}\r\n", Encoding.Default.GetBytes(args.Data).Length));
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bulider.Append(args.Data);
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}
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else
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{
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bulider.Append("\r\n");
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}
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string header = bulider.ToString();
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return Encoding.Default.GetBytes(header);
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}
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#endregion
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}
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public class MilliTimer
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{
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private static double times { get; set; }
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public static void start()
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{
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times = getTotalMilliseconds();
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}
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public static double getTimes()
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{
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return getTotalMilliseconds() - times;
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}
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public static double getTotalMilliseconds()
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{
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return DateTime.Now.Subtract(DateTime.Parse("1970-1-1")).TotalMilliseconds;
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}
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}
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} |