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Ben_D's avatar
Ben_D
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Aug 18, 2023

How to change javascript content from server response

Hello, 

I've an issue one of our apps call an external services across F5 BIG-IP, response is an javascript download on client browser. 

I would like to modify the content ( change fqdn ) of this javascript : irule, iruleLX or LTM policy. 

Do you know how can i do this ? 

I try with stream but it seems not work. 

best regards

 

1 Reply

  • Can you share the irule/stream profile?

    Because with an irule it should work:

    when HTTP_REQUEST {
     # Disable the stream filter for client requests
       STREAM::disable
       HTTP::header remove Accept-Encoding
    }
    
    when HTTP_RESPONSE {
     # Disable the stream filter for server responses
     STREAM::disable
     # Enable the stream filter for text responses only
     if {([HTTP::status] == 200)} {
      # Replace 'example.com' with 'app.example.com'
      STREAM::expression {@example.com@app.example.com@}
      # Enable the stream filter
      STREAM::enable
     }
    }

    Cheers,
    Kees