C#网络通信

using System; 

using System.IO; 

using System.Net; 

using System.Text; 

using System.Collections.Generic; 

using System.Text.RegularExpressions; 

   

namespace scan 

{ 

    public class zzHttp 

    { 

        private const string sContentType = "application/x-www-form-urlencoded"; 

        private const string sUserAgent = "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.2; .NET CLR 1.1.4322; .NET CLR 2.0.50727)"; 

          

        public static string Send(string data, string url) 

        { 

            return Send(Encoding.GetEncoding("UTF-8").GetBytes(data), url); 

        } 

   

        public static string Send(byte[] data, string url) 

        { 

            Stream responseStream; 

            HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest; 

            if (request == null) 

            { 

                  

                throw new ApplicationException(string.Format("Invalid url string: {0}", url)); 

            } 

            // request.UserAgent = sUserAgent; 

            request.ContentType = sContentType; 

            request.Method = "POST"; 

            request.ContentLength = data.Length; 

            Stream requestStream = request.GetRequestStream(); 

            requestStream.Write(data, 0, data.Length); 

            requestStream.Close(); 

            try 

            { 

                responseStream = request.GetResponse().GetResponseStream(); 

            } 

            catch (Exception exception) 

            { 

                   

                throw exception; 

            } 

            string str = string.Empty; 

            using (StreamReader reader = new StreamReader(responseStream, Encoding.GetEncoding("UTF-8"))) 

            { 

                str = reader.ReadToEnd(); 

            } 

            responseStream.Close(); 

            return str; 

        } 

  

        #region 同步通过POST方式发送数据 

        /// <summary> 

        /// 通过POST方式发送数据 

        /// </summary> 

        /// <param name="Url">url</param> 

        /// <param name="postDataStr">Post数据</param> 

        /// <param name="cookie">Cookie容器</param> 

        /// <returns></returns> 

        public string SendDataByPost(string Url, string postDataStr, ref CookieContainer cookie) 

        { 

            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url); 

            if (cookie.Count == 0) 

            { 

                request.CookieContainer = new CookieContainer(); 

                cookie = request.CookieContainer; 

            } 

            else 

            { 

                request.CookieContainer = cookie; 

            } 

            request.Method = "POST"; 

            request.ContentType = "application/x-www-form-urlencoded"; 

            request.ContentLength = postDataStr.Length; 

            //request.Timeout = 1000; 

            //request.ReadWriteTimeout = 3000; 

            Stream myRequestStream = request.GetRequestStream(); 

            StreamWriter myStreamWriter = new StreamWriter(myRequestStream, Encoding.GetEncoding("gb2312")); 

            myStreamWriter.Write(postDataStr); 

            myStreamWriter.Close(); 

            HttpWebResponse response = (HttpWebResponse)request.GetResponse(); 

            Stream myResponseStream = response.GetResponseStream(); 

            StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.GetEncoding("gb2312")); 

            string retString = myStreamReader.ReadToEnd(); 

            myStreamReader.Close(); 

            myResponseStream.Close(); 

            return retString; 

        } 

  

        #endregion 

        #region 同步通过GET方式发送数据 

        /// <summary> 

        /// 通过GET方式发送数据 

        /// </summary> 

        /// <param name="Url">url</param> 

        /// <param name="postDataStr">GET数据</param> 

        /// <param name="cookie">Cookie容器</param> 

        /// <returns></returns> 

        public string SendDataByGET(string Url, string postDataStr, ref CookieContainer cookie) 

        { 

            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url + (postDataStr == "" ? "" : "?") + postDataStr); 

            if (cookie.Count == 0) 

            { 

                request.CookieContainer = new CookieContainer(); 

                cookie = request.CookieContainer; 

            } 

            else 

            { 

                request.CookieContainer = cookie; 

            } 

            request.Method = "GET"; 

            request.ContentType = "text/html;charset=UTF-8"; 

            HttpWebResponse response = (HttpWebResponse)request.GetResponse(); 

            Stream myResponseStream = response.GetResponseStream(); 

            StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.GetEncoding("utf-8")); 

            string retString = myStreamReader.ReadToEnd(); 

            myStreamReader.Close(); 

            myResponseStream.Close(); 

            return retString; 

        } 

        #endregion 

   

   

   

        public string zzget(string Url,string getdata, string type) 

        { 

            try 

            { 

                System.Net.WebRequest wReq = System.Net.WebRequest.Create(Url + (getdata == "" ? "" : "?") + getdata); 

                // Get the response instance. 

                wReq.Method = "GET"; 

                wReq.ContentType = "text/html;charset=UTF-8"; 

                System.Net.WebResponse wResp = wReq.GetResponse(); 

                System.IO.Stream respStream = wResp.GetResponseStream(); 

                // Dim reader As StreamReader = New StreamReader(respStream) 

                using (System.IO.StreamReader reader = new System.IO.StreamReader(respStream, Encoding.GetEncoding(type))) 

                { 

                    return reader.ReadToEnd(); 

                } 

            } 

            catch (System.Exception ex) 

            { 

                //errorMsg = ex.Message; 

            } 

            return ""; 

        } 

   

        ///<summary> 

        ///采用post发送请求 

        ///</summary> 

        ///<param name="URL">url地址</param> 

        ///<param name="strPostdata">发送的数据</param> 

        ///<returns></returns> 

        public string zzpost(string URL, IDictionary<string, Object> strPostdata, string strEncoding) 

        { 

   

            //IDictionary<string, Object> idc = new Dictionary<string, object>(); 

            StringBuilder data = new StringBuilder(); 

            foreach (KeyValuePair<string, Object> param in strPostdata)  

            { 

                data.Append(param.Key).Append("="); 

                data.Append(param.Value.ToString()); 

                data.Append("&"); 

            } 

            data.Remove(data.Length- 1,1); 

            Encoding encoding = Encoding.Default; 

   

            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(URL); 

            request.CookieContainer = new CookieContainer();//少了这句就不能登录 

            request.Method = "post"; 

            request.Accept = "text/html, application/xhtml+xml, */*"; 

            request.ContentType = "application/x-www-form-urlencoded"; 

            byte[] buffer = encoding.GetBytes(data.ToString()); 

            request.ContentLength = buffer.Length; 

            request.GetRequestStream().Write(buffer, 0, buffer.Length); 

            /* 

            request.ContentLength = data.Length; 

            Stream myRequestStream = request.GetRequestStream(); 

            StreamWriter myStreamWriter = new StreamWriter(myRequestStream, Encoding.GetEncoding("gb2312")); 

            myStreamWriter.Write(data); 

            myStreamWriter.Close(); 

            */ 

            HttpWebResponse response = (HttpWebResponse)request.GetResponse(); 

            using (StreamReader reader = new StreamReader(response.GetResponseStream(), System.Text.Encoding.GetEncoding(strEncoding))) 

            { 

                return reader.ReadToEnd(); 

            } 

   

        } 

   

        /// <summary> 

        /// 清除文本中Html的标签 

        /// </summary> 

        /// <param name="Content"></param> 

        /// <returns></returns> 

        public static string ClearHtml(string Content) 

        { 

            Content = Zxj_ReplaceHtml("&#[^>]*;", "", Content); 

            Content = Zxj_ReplaceHtml("</?marquee[^>]*>", "", Content); 

            Content = Zxj_ReplaceHtml("</?object[^>]*>", "", Content); 

            Content = Zxj_ReplaceHtml("</?param[^>]*>", "", Content); 

            Content = Zxj_ReplaceHtml("</?embed[^>]*>", "", Content); 

            Content = Zxj_ReplaceHtml("</?table[^>]*>", "", Content); 

            Content = Zxj_ReplaceHtml(" ", "", Content); 

            Content = Zxj_ReplaceHtml("</?tr[^>]*>", "", Content); 

            Content = Zxj_ReplaceHtml("</?th[^>]*>", "", Content); 

            Content = Zxj_ReplaceHtml("</?p[^>]*>", "", Content); 

            Content = Zxj_ReplaceHtml("</?a[^>]*>", "", Content); 

            Content = Zxj_ReplaceHtml("</?img[^>]*>", "", Content); 

            Content = Zxj_ReplaceHtml("</?tbody[^>]*>", "", Content); 

            Content = Zxj_ReplaceHtml("</?li[^>]*>", "", Content); 

            Content = Zxj_ReplaceHtml("</?span[^>]*>", "", Content); 

            Content = Zxj_ReplaceHtml("</?div[^>]*>", "", Content); 

            Content = Zxj_ReplaceHtml("</?th[^>]*>", "", Content); 

            Content = Zxj_ReplaceHtml("</?td[^>]*>", "", Content); 

            Content = Zxj_ReplaceHtml("</?script[^>]*>", "", Content); 

            Content = Zxj_ReplaceHtml("(javascript|jscript|vbscript|vbs):", "", Content); 

            Content = Zxj_ReplaceHtml("on(mouse|exit|error|click|key)", "", Content); 

            Content = Zxj_ReplaceHtml("<\\?xml[^>]*>", "", Content); 

            Content = Zxj_ReplaceHtml("<\\/?[a-z]+:[^>]*>", "", Content); 

            Content = Zxj_ReplaceHtml("</?font[^>]*>", "", Content); 

            Content = Zxj_ReplaceHtml("</?b[^>]*>", "", Content); 

            Content = Zxj_ReplaceHtml("</?u[^>]*>", "", Content); 

            Content = Zxj_ReplaceHtml("</?i[^>]*>", "", Content); 

            Content = Zxj_ReplaceHtml("</?strong[^>]*>", "", Content); 

            Content = Zxj_ReplaceHtml("</?strong[^>]*>", "", Content); 

   

            Content = Zxj_ReplaceHtml(" ", "", Content); 

            Regex r = new Regex(@"\s+"); 

            Content = r.Replace(Content, ""); 

   

            Content.Trim(); 

            string clearHtml = Content; 

            return clearHtml; 

        } 

   

        /// <summary> 

        /// 清除文本中的Html标签 

        /// </summary> 

        /// <param name="patrn">要替换的标签正则表达式</param> 

        /// <param name="strRep">替换为的内容</param> 

        /// <param name="content">要替换的内容</param> 

        /// <returns></returns> 

        private static string Zxj_ReplaceHtml(string patrn, string strRep, string content) 

        { 

            if (string.IsNullOrEmpty(content)) 

            { 

                content = ""; 

            } 

            Regex rgEx = new Regex(patrn, RegexOptions.IgnoreCase); 

            string strTxt = rgEx.Replace(content, strRep); 

            return strTxt; 

        } 

   

   

    } 

}