用DOM实现文章采集--采集到网页源码(4)

                responseStream = response.GetResponseStream(); 
               
                if (response.Headers["Accept-Encoding"] != null) 
                { 
                    if (MyCollections.Contain(response.Headers["Accept-Encoding"], "*", "gzip", "x-gzip")) 
                    { 
                        responseStream = new GZipStream(responseStream, CompressionMode.Decompress); 
                    } 
                } 
                else if (response.Headers["Content-Encoding"] != null) 
                { 
                    if (MyCollections.Contain(response.Headers["Content-Encoding"], "*", "gzip", "x-gzip")) 
                    { 
                        responseStream = new GZipStream(responseStream, CompressionMode.Decompress); 
                    } 
                } 
                
                if (this._HttpEncoding == null) 
                { 
                    string str = response.CharacterSet.ToLower(); 
                    if (str.Length > 3)