POST /wangchy0927/mvc/blog/sidecolumn.aspx HTTP/1.1 x-requested-with: XMLHttpRequest Accept-Language: zh-cn Referer: http://www.cnblogs.com/wangchy0927/ Accept: text/plain, */*; q=0.01 Content-Type: application/json; charset=utf-8 Accept-Encoding: gzip, deflate User-Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; GTB7.0; .NET CLR 2.0.50727; .NET CLR 3.0.04506.30; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; InfoPath.2) Host: www.cnblogs.com Content-Length: 25 Connection: Keep-Alive Cache-Control: no-cache
x-requested-with:The X-Requested-With is a non-standard HTTP header which is mainly used to identify Ajax requests. Most JavaScript frameworks send this header with value of XMLHttpRequest.