Re: [web-devel] Re: adding debug output to a response

On Mon, Nov 29, 2010 at 5:56 PM, Simon Michael wrote:

Thanks, I did not know about onRequest.

I want to send debug output immediately to the response, so that it appears on the rendered web page intermixed with the regular content. Ie I'm wondering is if there's an equivalent of trace for the web output.

Not really. In Yesod the entire response body is formed before being sent out, so during the "processing" phase, you can't inject information into the output stream like you can in PHP. If you're using a Hamlet template, you could stick debugging output in there, but that's probably not what you want. If you give an example of the type of debugging output you are trying to achieve, it might give some insight. Michael