c# 模拟POST,GET访问

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using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Net; using System.IO;     namespace WeixinPrinter {     class HttpTool     {           /// <summary>         /// 模拟POST访问         /// </summary>         /// <param name="postUrl">模拟POST的URL</param>         /// <param name="postDataStr">需要POST的数据</param>         /// <returns>模拟访问的网页源代码</returns>         public static string sendPost(string postUrl, string postDataStr)         {             System.Net.ServicePointManager.DefaultConnectionLimit = 100;             System.Net.ServicePointManager.Expect100Continue = false;               //用来存放cookie             CookieContainer cookie = null;             HttpWebRequest request = null;             Stream myRequestStream = null;             HttpWebResponse response = null;             Stream myResponseStream = null;             StreamReader myStreamReader = null;             try             {                 //转化                 byte[] byteArray = Encoding.UTF8.GetBytes(postDataStr);                 cookie = new CookieContainer();                 //发送一个POST请求                 request = (HttpWebRequest)WebRequest.Create(new Uri(postUrl));                 request.CookieContainer = cookie;                 request.Timeout = 3000;                 request.Method = "POST";                 request.ContentType = "application/x-www-form-urlencoded";                 request.ContentLength = byteArray.Length;                 myRequestStream = request.GetRequestStream();                 myRequestStream.Write(byteArray, 0, byteArray.Length);                 myRequestStream.Close();                 //获取返回的内容                 response = (HttpWebResponse)request.GetResponse();                 response.Cookies = cookie.GetCookies(response.ResponseUri);                 myResponseStream = response.GetResponseStream();                 myStreamReader = new StreamReader(myResponseStream, Encoding.GetEncoding("utf-8"));                 return myStreamReader.ReadToEnd();             }             catch (Exception ex)             {                 Console.WriteLine("postUrl = " + postUrl + "  Exception" + ex);             }             finally             {                 if (myStreamReader != null)                 {                     myStreamReader.Close();                 }                 if (myResponseStream != null)                 {                     myResponseStream.Close();                 }                 if (response != null)                 {                     response.Close();                 }                 if (request != null)                 {                     request.Abort();                 }             }               return "";         }           /// <summary>         /// 模拟GET访问         /// </summary>         /// <param name="getUrl">模拟GET的URL</param>         /// <returns>模拟访问的网页源代码</returns>         public static string SendGet(string getUrl)         {             System.Net.ServicePointManager.DefaultConnectionLimit = 100;             HttpWebRequest request = null;             HttpWebResponse response = null;             Stream myResponseStream = null;             StreamReader myStreamReader = null;             try             {                 request = (HttpWebRequest)WebRequest.Create(getUrl);                 request.Method = "GET";                 request.ContentType = "text/html;charset=UTF-8";                 request.Timeout = 3000;                 response = (HttpWebResponse)request.GetResponse();                 myResponseStream = response.GetResponseStream();                 myStreamReader = new StreamReader(myResponseStream, Encoding.GetEncoding("utf-8"));                 return myStreamReader.ReadToEnd();             }             catch (Exception ex)             {                 Console.WriteLine("getUrl = " + getUrl + "  Exception" + ex);             }             finally             {                 if (myStreamReader != null)                 {                     myStreamReader.Close();                 }                 if (myResponseStream != null)                 {                     myResponseStream.Close();                 }                 if (response != null)                 {                     response.Close();                 }                 if (request != null)                 {                     request.Abort();                 }             }               return "";         }            #region Http下载文件         /// <summary>         /// Http下载文件         /// </summary>         public static string HttpDownloadFile(string url, string path)         {             // 设置参数             HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;               //发送请求并获取相应回应数据             HttpWebResponse response = request.GetResponse() as HttpWebResponse;             //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(path, FileMode.Create);               byte[] bArr = new byte[1024];             int size = responseStream.Read(bArr, 0, (int)bArr.Length);             while (size > 0)             {                 stream.Write(bArr, 0, size);                 size = responseStream.Read(bArr, 0, (int)bArr.Length);             }             stream.Close();             responseStream.Close();             return path;         }         #endregion           #region Http上传文件         /// <summary>         /// Http上传文件         /// </summary>         public static string HttpUploadFile(string url, string path)         {             // 设置参数             HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;             CookieContainer cookieContainer = new CookieContainer();             request.CookieContainer = cookieContainer;             request.AllowAutoRedirect = true;             request.Method = "POST";             string boundary = DateTime.Now.Ticks.ToString("X"); // 随机分隔线             request.ContentType = "multipart/form-data;charset=utf-8;boundary=" + boundary;             byte[] itemBoundaryBytes = Encoding.UTF8.GetBytes("\r\n--" + boundary + "\r\n");             byte[] endBoundaryBytes = Encoding.UTF8.GetBytes("\r\n--" + boundary + "--\r\n");               int pos = path.LastIndexOf("\\");             string fileName = path.Substring(pos + 1);               //请求头部信息             StringBuilder sbHeader = new StringBuilder(string.Format("Content-Disposition:form-data;name=\"file\";filename=\"{0}\"\r\nContent-Type:application/octet-stream\r\n\r\n", fileName));             byte[] postHeaderBytes = Encoding.UTF8.GetBytes(sbHeader.ToString());               FileStream fs = new FileStream(path, FileMode.Open, FileAccess.Read);             byte[] bArr = new byte[fs.Length];             fs.Read(bArr, 0, bArr.Length);             fs.Close();               Stream postStream = request.GetRequestStream();             postStream.Write(itemBoundaryBytes, 0, itemBoundaryBytes.Length);             postStream.Write(postHeaderBytes, 0, postHeaderBytes.Length);             postStream.Write(bArr, 0, bArr.Length);             postStream.Write(endBoundaryBytes, 0, endBoundaryBytes.Length);             postStream.Close();               //发送请求并获取相应回应数据             HttpWebResponse response = request.GetResponse() as HttpWebResponse;             //直到request.GetResponse()程序才开始向目标网页发送Post请求             Stream instream = response.GetResponseStream();             StreamReader sr = new StreamReader(instream, Encoding.UTF8);             //返回结果网页（html）代码             string content = sr.ReadToEnd();             return content;         }         #endregion     } }

　　

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Net;
using System.IO;


namespace WeixinPrinter
{
    class HttpTool
    {

        /// <summary>
        /// 模拟POST访问
        /// </summary>
        /// <param name="postUrl">模拟POST的URL</param>
        /// <param name="postDataStr">需要POST的数据</param>
        /// <returns>模拟访问的网页源代码</returns>
        public static string sendPost(string postUrl, string postDataStr)
        {
            System.Net.ServicePointManager.DefaultConnectionLimit = 100;
            System.Net.ServicePointManager.Expect100Continue = false;

            //用来存放cookie
            CookieContainer cookie = null;
            HttpWebRequest request = null;
            Stream myRequestStream = null;
            HttpWebResponse response = null;
            Stream myResponseStream = null;
            StreamReader myStreamReader = null;
            try
            {
                //转化
                byte[] byteArray = Encoding.UTF8.GetBytes(postDataStr);
                cookie = new CookieContainer();
                //发送一个POST请求
                request = (HttpWebRequest)WebRequest.Create(new Uri(postUrl));
                request.CookieContainer = cookie;
                request.Timeout = 3000;
                request.Method = "POST";
                request.ContentType = "application/x-www-form-urlencoded";
                request.ContentLength = byteArray.Length;
                myRequestStream = request.GetRequestStream();
                myRequestStream.Write(byteArray, 0, byteArray.Length);
                myRequestStream.Close();
                //获取返回的内容
                response = (HttpWebResponse)request.GetResponse();
                response.Cookies = cookie.GetCookies(response.ResponseUri);
                myResponseStream = response.GetResponseStream();
                myStreamReader = new StreamReader(myResponseStream, Encoding.GetEncoding("utf-8"));
                return myStreamReader.ReadToEnd();
            }
            catch (Exception ex)
            {
                Console.WriteLine("postUrl = " + postUrl + "  Exception" + ex);
            }
            finally
            {
                if (myStreamReader != null)
                {
                    myStreamReader.Close();
                }
                if (myResponseStream != null)
                {
                    myResponseStream.Close();
                }
                if (response != null)
                {
                    response.Close();
                }
                if (request != null)
                {
                    request.Abort();
                }
            }

            return "";
        }

        /// <summary>
        /// 模拟GET访问
        /// </summary>
        /// <param name="getUrl">模拟GET的URL</param>
        /// <returns>模拟访问的网页源代码</returns>
        public static string SendGet(string getUrl)
        {
            System.Net.ServicePointManager.DefaultConnectionLimit = 100;
            HttpWebRequest request = null;
            HttpWebResponse response = null;
            Stream myResponseStream = null;
            StreamReader myStreamReader = null;
            try
            {
                request = (HttpWebRequest)WebRequest.Create(getUrl);
                request.Method = "GET";
                request.ContentType = "text/html;charset=UTF-8";
                request.Timeout = 3000;
                response = (HttpWebResponse)request.GetResponse();
                myResponseStream = response.GetResponseStream();
                myStreamReader = new StreamReader(myResponseStream, Encoding.GetEncoding("utf-8"));
                return myStreamReader.ReadToEnd();
            }
            catch (Exception ex)
            {
                Console.WriteLine("getUrl = " + getUrl + "  Exception" + ex);
            }
            finally
            {
                if (myStreamReader != null)
                {
                    myStreamReader.Close();
                }
                if (myResponseStream != null)
                {
                    myResponseStream.Close();
                }
                if (response != null)
                {
                    response.Close();
                }
                if (request != null)
                {
                    request.Abort();
                }
            }

            return "";
        }

 #region Http下载文件

        /// <summary>

        /// Http下载文件

        /// </summary>

        public static string HttpDownloadFile(string url, string path)

        {

            // 设置参数

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

 

            //发送请求并获取相应回应数据

            HttpWebResponse response = request.GetResponse() as HttpWebResponse;

            //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(path, FileMode.Create);

 

            byte[] bArr = new byte[1024];

            int size = responseStream.Read(bArr, 0, (int)bArr.Length);

            while (size > 0)

            {

                stream.Write(bArr, 0, size);

                size = responseStream.Read(bArr, 0, (int)bArr.Length);

            }

            stream.Close();

            responseStream.Close();

            return path;

        }

        #endregion

 

        #region Http上传文件

        /// <summary>

        /// Http上传文件

        /// </summary>

        public static string HttpUploadFile(string url, string path)

        {

            // 设置参数

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

            CookieContainer cookieContainer = new CookieContainer();

            request.CookieContainer = cookieContainer;

            request.AllowAutoRedirect = true;

            request.Method = "POST";

            string boundary = DateTime.Now.Ticks.ToString("X"); // 随机分隔线

            request.ContentType = "multipart/form-data;charset=utf-8;boundary=" + boundary;

            byte[] itemBoundaryBytes = Encoding.UTF8.GetBytes("\r\n--" + boundary + "\r\n");

            byte[] endBoundaryBytes = Encoding.UTF8.GetBytes("\r\n--" + boundary + "--\r\n");

 

            int pos = path.LastIndexOf("\\");

            string fileName = path.Substring(pos + 1);

 

            //请求头部信息 

            StringBuilder sbHeader = new StringBuilder(string.Format("Content-Disposition:form-data;name=\"file\";filename=\"{0}\"\r\nContent-Type:application/octet-stream\r\n\r\n", fileName));

            byte[] postHeaderBytes = Encoding.UTF8.GetBytes(sbHeader.ToString());

 

            FileStream fs = new FileStream(path, FileMode.Open, FileAccess.Read);

            byte[] bArr = new byte[fs.Length];

            fs.Read(bArr, 0, bArr.Length);

            fs.Close();

 

            Stream postStream = request.GetRequestStream();

            postStream.Write(itemBoundaryBytes, 0, itemBoundaryBytes.Length);

            postStream.Write(postHeaderBytes, 0, postHeaderBytes.Length);

            postStream.Write(bArr, 0, bArr.Length);

            postStream.Write(endBoundaryBytes, 0, endBoundaryBytes.Length);

            postStream.Close();

 

            //发送请求并获取相应回应数据

            HttpWebResponse response = request.GetResponse() as HttpWebResponse;

            //直到request.GetResponse()程序才开始向目标网页发送Post请求

            Stream instream = response.GetResponseStream();

            StreamReader sr = new StreamReader(instream, Encoding.UTF8);

            //返回结果网页（html）代码

            string content = sr.ReadToEnd();

            return content;

        }

        #endregion

    }
}