4.7 449 Response and Echo Reply

  • Article

The following example shows a server returning a 449 response status along with a script to request that the browser set a cookie with the client's available screen dimensions. The client responds to the 449 response and echo request with an echo reply and the cookie that was generated as a result of executing the script.

Request:

 GET /449/screen.449 HTTP/1.1
 Host: localhost
 Accept: */*
 

Response:

 HTTP/1.1 449 Reply With
 Content-Type: text/html
 Ms-Echo-Request: token
 Content-Length: 296
  
 <html>
 <head>
 </head>
 <body onload="createCookie();">
 <script language="JavaScript">
 <!--
 function createCookie()
 {
     strCookie = 'availWidth=' + screen.availWidth + '&availHeight=' + screen.availHeight;
     document.cookie = 'screen=' + strCookie;
 }
 --></script>
 </body>
 </html>
 

Echo reply:

 GET /449/screen.449 HTTP/1.1
 Host: localhost
 Accept:*/*
 Ms-Echo-Reply: token
 Cookie: screen=availWidth=800&availHeight=600
 

Final response:

 HTTP/1.1 200 OK
 Content-Type: text/html
 Content-Length: 125
  
 <html>
 <head>
 </head>
 <body>
 Please adjust your screen resolution to 1600 x 1200 to enjoy this content.
 </body>
 </html>