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MR_Freddy_31338's avatar
MR_Freddy_31338
Icon for Nimbostratus rankNimbostratus
Feb 20, 2018

304 Response code failure with java script Application

We have a problem with 304 response code

 

First Scenario:

 

-> VS listen on HTTPS and Server on HTTP with client SSL profile only with automap

 

-> Here we viewed that GET HTTP request sent with more header than the second scenario with "if modified since" header and "if none match" header

 

-> Which caused server respond with 304 response code

 

All 304 response code appeared with URL contain "JS" only

 

Second Scenario:

 

-> VS listen on HTTP and server on HTTP with automap

 

-> Here Server respond without any "if modified since" header and "if none match" header

 

-> As well as the server respond with 200 response code

 

All 304 response code appeared with URL contain "JS" only

 

application delivery
LTM
  • Anesh's avatar
    Anesh
    Icon for Cirrostratus rankCirrostratus
    Feb 21, 2018

    its expected to get a 304 response with a HTTP request header containing If-None-Match or a If-Modified-Since header, And the reason it happens for java script files is because static content will be cached.

     

  • MR_Freddy's avatar
    MR_Freddy
    Icon for Nimbostratus rankNimbostratus
    Feb 21, 2018

    @Surgeop .... the problem that backend server responds with 304 not 200 when applied VS HTTPS

     

  • Surgeon's avatar
    Surgeon
    Ret. Employee
    Feb 22, 2018

    I see. As Nesh mentioned below 304 is not error message. It just means that java script was cached on the client side and it was not updated on the server side since last download, thus it was not provided by the server side. This is as per HTTP rules and nothing wrong with it until it breaks service on you side.

     

  • Anesh's avatar
    Anesh
    Icon for Cirrostratus rankCirrostratus
    Feb 22, 2018

    You Mentioned "Which caused server respond with 304 response code "

     

    Hence i assuming the web requests are not properly handled by the web server, i have seen this in the past with ajax calls[XMLHttpRequest].

     

    Also, you can try the below irule on the VS

     

    when HTTP_REQUEST { 
if { [HTTP::header exists If-Modified-Since] } { 
   CACHE::disable 
} 
}