C#模拟http 发送POST或GET请求

 

1、POST：

  private string HttpPost(string Url, string postDataStr, CookieCollection cookies)

        {

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

            request.Method = "POST";

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

            request.ContentLength = Encoding.UTF8.GetByteCount(postDataStr);

            if (cookies != null)

            {

                request.CookieContainer = new CookieContainer();

                request.CookieContainer.Add(cookies);

            }

            Stream myRequestStream = request.GetRequestStream();

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

            myStreamWriter.Write(postDataStr);

            myStreamWriter.Close();

 

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

 

            response.Cookies = cookie.GetCookies(response.ResponseUri);

            Stream myResponseStream = response.GetResponseStream();

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

            string retString = myStreamReader.ReadToEnd();

            myStreamReader.Close();

            myResponseStream.Close();

 

            return retString;

        }

2、GET：

        public string HttpGet(string Url, string postDataStr)

        {

            HttpWebResponse response = null;

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

            request.Timeout = 30000; // 设置超时时间,单位毫秒。默认100000毫秒，100秒

            try

            {

            request.Method = "GET";

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

request.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; .NET CLR 1.0.3705;)";

            response = (HttpWebResponse)request.GetResponse();

            Stream myResponseStream = response.GetResponseStream();

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

            string retString = myStreamReader.ReadToEnd();

                  myStreamReader.Close();

 myStreamReader.Dispose();

                  myResponseStream.Close();

                  myResponseStream.Dispose();

                  return retString ;

            } catch(Exception ex){

                Console.WriteLine(ex.ToString());

            } finally{

                if (response != null)

{

response.Close();

}

            }

            return "false";

        }