清理SQUID服务器资源缓存

        /// <summary>
        /// 刷新Squid服务器上的文件地址
        /// </summary>
        /// <param name="flushUrl">Squid服务器上的文件地址</param>
        /// <returns></returns>
        public static bool FlushSQUID(string flushUrl)
        {
            string result = string.Empty;
            try
            {
                HttpWebRequest request = WebRequest.Create(flushUrl) as HttpWebRequest;
                string host = request.Address.Host;
                request.Accept = "*/*";
                request.Method = "PURGE";
                request.Referer = "http://" + host;
                request.Timeout = 30 * 1000;
                request.Headers.Add("Cache-Control", "no-cache");
                request.Proxy = new WebProxy("121.207.242.236");
                using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
                {
                    Stream respStream = response.GetResponseStream();
                    using (respStream)
                    using (StreamReader reader = new StreamReader(respStream, Encoding.UTF8))
                    {
                        if (response.StatusCode == HttpStatusCode.OK)
                        {
                            result = reader.ReadToEnd();
                            return !string.IsNullOrEmpty(result);
                        }
                    }
                }
            }
            catch
            {
                return false;
            }
            return false;
        }

 

 

 这里主要的关键点是在： request.method = "PURGE";