using System;using System.Collections.Generic;using System.IO;using System.Linq;using System.Net;using System.Text;namespace Common{    public class WebH    {        WebProxy proxy;        public string ContentType { get; set; } = "application/x-www-form-urlencoded";        public string Accept { get; set; } = "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8";        public string UserAgent { get; set; } = "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/42.0.2311.152 Safari/537.36";        public CookieContainer Cookie { get; set; } = new CookieContainer();        public WebH() { }        public WebH(WebProxy proxy)        {            this.proxy = proxy;        }        public WebH(string url, string user, string pwd)        {            proxy = new WebProxy()            {                Address = new Uri(url),//"http://openproxy..com:8080"                Credentials = new NetworkCredential(user, pwd),            };        }        public string GetHtml(string url)        {            HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(url);            HttpWebResponse response = null;            try            {                request.Method = "GET";                request.Proxy = proxy;                request.CookieContainer = Cookie;                request.ContentType = ContentType;                //request.ServicePoint.ConnectionLimit = 300;                response = (HttpWebResponse)request.GetResponse();                Stream responseStream = response.GetResponseStream();                StreamReader streamReader = new StreamReader(responseStream, Encoding.UTF8);                return streamReader.ReadToEnd();            }            catch (Exception e)            {                throw e;            }            finally            {                request.Abort();                if (response != null)                    response.Close();            }        }        public string PostData(string url, string param, Action
     
       action = null)        {            HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(url);            try            {                byte[] bs = Encoding.ASCII.GetBytes(param);                request.Method = "POST";                request.Accept = Accept;                request.UserAgent = UserAgent;                request.Proxy = proxy;                request.ContentType = ContentType;                request.ContentLength = bs.Length;                request.CookieContainer = Cookie;                request.KeepAlive = true;                request.Referer = "https://www3.wipo.int/dasapplicant/en/pages/workbench/applicant.xhtml";                action?.Invoke(request.Headers);                using (Stream reqStream = request.GetRequestStream())                {                    reqStream.Write(bs, 0, bs.Length);//写数据时开始访问                }                using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())                {                    return new StreamReader(response.GetResponseStream(), Encoding.UTF8).ReadToEnd();                }            }            catch (Exception ex)            {                return ex.Message;            }            finally            {                request.Abort();            }        }        public string PostDataAJAX(string url, string param)        {            HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(url);            try            {                byte[] bs = Encoding.ASCII.GetBytes(param);                request.Method = "POST";                request.Accept = Accept;                request.UserAgent = UserAgent;                request.Proxy = proxy;                request.ContentType = ContentType;                request.ContentLength = bs.Length;                request.CookieContainer = Cookie;                request.KeepAlive = true;                //request.Connection = "keep-alive";                request.Headers.Add("X-Requested-With", "XMLHttpRequest");                using (Stream reqStream = request.GetRequestStream())                {                    reqStream.Write(bs, 0, bs.Length);//写数据时开始访问                }                using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())                {                    return new StreamReader(response.GetResponseStream(), Encoding.UTF8).ReadToEnd();                }            }            catch (Exception ex)            {                return ex.Message;            }            finally            {                //request.Abort();            }        }    }}