Node / Express和Spooky / Casper js之间的通信

I tried to incorporate node/express with spooky js. However, I wasn't able to send back the elements I retrieved using spookyjs. Below is my code. With my code, I only got foo printed out although I intended to get all the DOM elements data with spooky. I was wondering if anyone has the experience how this can be done? Thanks in advance!I tried to incorporate node/express with spooky