HttpWebResponse对gzip格式返回结果的处理

  HttpWebRequest webRequest = (System.Net.HttpWebRequest)System.Net.WebRequest.Create(url); 

HttpWebResponse webResponse = (System.Net.HttpWebResponse)webRequest.GetResponse();

            Stream streamReceive = webResponse.GetResponseStream();

  if (webResponse.ContentEncoding.ToLower().Contains("gzip"))
                {
                    //gzip格式
                    streamReceive = new GZipStream(streamReceive, CompressionMode.Decompress);
                }

 using (System.IO.StreamReader sr = new System.IO.StreamReader(streamReceive, encoding))
                {
                    responseData = sr.ReadToEnd();
                }