Avoid injection for AMP pages

[ghost]

Love the product, yet run into one very important issues and that's the fact that for AMP pages included javascripts are not allowed. My setup is simple like this

    #configure tracker for website tracking
    config.middleware.use(Rack::Tracker) do
      handler :google_analytics, { tracker: Rails.application.credentials.dig(:google, :ga), ecommerce:true}
    end

I'm looking for a way in the middleware configuration to avoid the injection in case the request.rul end_with .amp Disable by sending DNT=1 in the header works great, yet Google doesn't do that. would love to see a configuration option

[DonSchado]

you can set any tracker option dynamically during requests by providing a lambda.

[ghost]

thanks for the quick response, but can you give an example. When the request is an amp request (mimeType) then it should inject.

[DonSchado]

not sure about the mime type, but you have access to everything in the rack env. have a look here:

• https://github.com/railslove/rack-tracker#google-analytics
• https://github.com/railslove/rack-tracker/issues/10

[DonSchado]

@petervandeput did that help? mind to share your solution for others?

[ghost]

Not really, problem I'm trying to solve is that when an amp version of the page is request (e.g. by Google) the code is not injected. still haven't figured out how to do

[DonSchado]

I have no experience with AMP but let's figure this out.

Please refer to this spec as an example: https://github.com/railslove/rack-tracker/commit/f3d4e65dee9527136c7613940f5cee16fba91f88#diff-f961e0b587e363c3a6cd9a6a3a231684

You have full access to anything in the rack env hash, which might look something similar to this:

{
  "GATEWAY_INTERFACE"=>"CGI/1.1",
  "HTTP_ACCEPT"=>"text/html,application/xhtml+xml",
  "HTTP_ACCEPT_ENCODING"=>"gzip",
  "HTTP_ACCEPT_LANGUAGE"=>"en-US,en;q=0.8,de;q=0.6",
  "HTTP_CACHE_CONTROL"=>"max-age=0",
  "HTTP_HOST"=>"localhost:3000",
  "HTTP_USER_AGENT"=>"Mozilla/5.0 (Macintosh; Intel Mac OS X)",
  "HTTP_VERSION"=>"HTTP/1.1",
  "PATH_INFO"=>"/",
  "QUERY_STRING"=>"",
  "rack.version"=>[1, 3], 
  "rack.url_scheme"=>"http",
  "REMOTE_ADDR"=>"127.0.0.1",
  "REMOTE_HOST"=>"localhost",
  "REQUEST_METHOD"=>"GET",
  "REQUEST_PATH"=>"/"
  "REQUEST_URI"=>"http://localhost:3000/",
  "SCRIPT_NAME"=>"",
  "SERVER_NAME"=>"localhost",
  "SERVER_PORT"=>"3000",
  "SERVER_PROTOCOL"=>"HTTP/1.1",
  "SERVER_SOFTWARE"=>"WEBrick/1.3.1 (Ruby/2.2.1/2015-02-26)",
}

Are you sure the request url contains what you're looking for? or is it maybe the referrer?

So if the env hash is not enough, you should be able to access the controller instance with env["action_controller.instance"] and ask the request object for further information to decide if you inject the tracker.

[ghost]

Thanks solved

[bumi]

@petervandeput do you want to share an example on how you solved it? This might be helpful for others who try to do similar things.

[luizeof]

@petervandeput see https://github.com/railslove/rack-tracker/issues/110#issuecomment-670945283