add HTTP Header

Hi there,

 

 

You can use HTTP::header (Click here) to check if a header exists and to insert a new header or modify a new header.

 

 

Do you want to check if the header name is abc123 or the header value is abc123? Does the order of the HTTP headers matter? By default if you insert a new header it will be inserted after the existing headers. If you need the new header inserted before the existing one, you could insert the new one, save the value of the old one, remove the old one and insert a new instance of the old header.

 

 

Aaron

Dear aaron,

 

 

Could you show me how to use the HTTP:Header insert, I need to add a new header before the old header, and check if the incoming header is "abc" then add a new header "efg" before the "abc".

 

 

Thanks

I assume you have a scenario like this:

GET / HTTP/1.1

Host: somehost.example.com

ABC: abcs_value

And you want to check if there is an ABC header and if so insert a new header named EFG like this:

GET / HTTP/1.1

Host: somehost.example.com

EFG: efg_value

ABC: abc_value

If so, this should work:

 
 when HTTP_REQUEST { 
  
     Check if ABC header exists 
    if {[HTTP::header exists "ABC"]}{ 
  
        Save the value of ABC 
       set abc_value [HTTP::header value "ABC"] 
  
        Remove the ABC header 
       HTTP::header remove "ABC" 
  
        Insert the EFG header 
       HTTP::header insert "EFG" value "efg_value" 
  
        Insert the ABC header again so it's after the EFG header 
       HTTP::header insert "ABC" value $abc_value 
    } 
 } 
 

Note that I haven't tested it, but it looks about right. If you run into any issues, try adding some logging to the iRule.

Thanks,

Aaron