如何知道WebRequest的GetResponse()下载的是不是网页

Question

HttpWebResponse   response   =   (HttpWebResponse)request.GetResponse(); 
WebHeaderCollection   coll   =   request.Headers; 
检查http头

Answer 1

试了试没用的，我测试了两个地址，
一个是http://..../download.asp(该地址会下载文件)
另一个是http://.../list.html(网页)
这两个的Headers分别是
"Host: xxx.com\r\nConnection: Keep-Alive\r\n\r\n"
"Host: xxx.com\r\nConnection: Keep-Alive\r\n\r\n"这种能区别出来吗？

Answer 2

我下载网页的代码如下，请各位看看怎么获取下载的文件类型呢
WebResponse wrp = null;
 try
            {
                WebRequest wrq = WebRequest.Create(url);
                wrq.Timeout = 10000;
                wrp = wrq.GetResponse();
                
            }
           catch (Exception e)
            {
                //把该ID的url状态设置为3
                sql.UpdateData("update downurl set state=3 where id=" + str[0, 0].Trim());            }
            finally
            {                    if (wrp != null)
                    {
                        StreamReader sr = new StreamReader(wrp.GetResponseStream(), Encoding.GetEncoding(getEncoding((HttpWebResponse)wrp)));
                        strHtml = sr.ReadToEnd();
                        sr.Close();
                        wrp.Close();
                    }
            }            
        }