Forum Discussion

Marc_13733's avatar
Marc_13733
Icon for Nimbostratus rankNimbostratus
Feb 16, 2010

Change Content Disposition from Inline to Attachment

Our DMS server returns only inline disposition headers: 

Content-Disposition: inline; filename=somefile.pdf

We need to replace this header with the following: 

Content-Disposition: attachment; filename=somefile.pdf

Basically we need something like this: 

 
 set newheader [HTTP::header Content-Disposition] 
 set newheader strreplace($newheader, "inline", "attachment") 
 HTTP::header replace Content-Disposition $newheader

Something like this??: 

 
 set newheader string map {inline attachment} [HTTP::header Content-Disposition]
application delivery
dev
devops
iRules
  • hoolio's avatar
    hoolio
    Icon for Cirrostratus rankCirrostratus
    Feb 16, 2010
    Hi Marc,

    Can you try this? 

     
 when HTTP_RESPONSE { 
  
     Check if there is a Content-Disposition header with inline in the value 
    if {[string tolower [HTTP::header Content-Disposition]] contains "inline"}{ 
  
        Replace the Content-Disposition header with inline replaced with attachment 
       HTTP::header replace Content-Disposition [string map -nocase "inline attachment" [HTTP::header Content-Disposition]] 
    } 
 }

    Aaron
  • Marc_13733's avatar
    Marc_13733
    Icon for Nimbostratus rankNimbostratus
    Feb 16, 2010
    Thanks Aaron, works perfectly!

    One more thing - we want this modification to only occur when the querystring contains the word "attachment". When we do this: 

     
 when HTTP_RESPONSE { 
 set querystring URI::query 
 if { $querystring contains "attachment=1" } { 
  HTTP::header replace Content-Disposition [string map -nocase "inline attachment" [HTTP::header Content-Disposition]]  
 } 
 }

    We get an error "command is not valid in current event context". Apparently we can't query the querystring in a HTTP_RESPONSE block. How else can we do this header modification based on the URI?
  • Marc_13733's avatar
    Marc_13733
    Icon for Nimbostratus rankNimbostratus
    Feb 16, 2010
    Gottit! 

     
 when HTTP_REQUEST {  
  set querystring URI::query  
 } 
  
 when HTTP_RESPONSE {  
  if { $querystring contains "attachment=1" } {  
   HTTP::header replace Content-Disposition [string map -nocase "inline attachment" [HTTP::header Content-Disposition]]   
  }  
  
 }
  • hoolio's avatar
    hoolio
    Icon for Cirrostratus rankCirrostratus
    Feb 16, 2010
    Great that you figured it out. You could also try something like this: 

      
  when HTTP_REQUEST {  
    
      Check if the query string contains a parameter named attachment with a value of 1  
     if {[URI::query [HTTP::uri] "attachment"] == 1}{  
        set check_response 1  
     } else {  
        set check_response 0  
     }       
  }  
    
  when HTTP_RESPONSE {  
     if { $check_response } {  
        HTTP::header replace Content-Disposition [string map -nocase "inline attachment" [HTTP::header Content-Disposition]]  
     }  
  }

    Aaron

    edited to add HTTP::query to URI::query command...