Serve Status Page with Images on LTM v10.2

There are a few iRules in the codeshare under the topics of "maintenance page" or "image server" that should help here, in the absence of iRules. Here are a few:

 

https://devcentral.f5.com/wiki/iRules.LTMImageHosting.ashx

 

https://devcentral.f5.com/wiki/iRules.LTMMaintenancePage.ashx

 

In both of the above cases, the css, js, or image is base64-encoded into a data group entry and then decoded on the way back out.

 

These examples are over complicating what I am trying to do.

 

Can I just base64 encode the single image and then reference it in my HTTP::respond?

 

Can I just base64 encode the single image and then reference it in my HTTP::respond?

Of course. The data group is just a place to store the information, but you could just as easily include that "string" directly in the iRule.

when HTTP_REQUEST {
    if { [HTTP::uri] equals "/myimage.png" } {
        set img "...base64-encoded image data..."
        HTTP::respond 200 content [b64decode $img] "Content-Type" "image/png"
    } else {
        HTTP::respond 200 content "...some HTML that includes an image src tag for /myimage.png..."
    }
}

Or, if you wanted to get really crazy and not require a second request for the image, you could include the data inline in your HTML response:

img src="data:image/png;base64,...base64-encoded image..."

This ultimately resolved my issue. This gives me a simple page with our logo along with the source IP address. The image is embedded in the HTML which does not require to place any additional files on the files system.

I encoded the image in base 64 using http://www.base64-image.de/. Note that I shortened the base 64 for the purpose of this post.

This is the iRule

when HTTP_REQUEST {
  set data " Fiserv Item Processing - Your IP Address ![](\)




You submitted this request from IP Address: [IP::client_addr]


" 
  HTTP::respond 200 content $data
}