Parse output of spawned node.js child process line by line

Question

I have a PhantomJS/CasperJS script which I\'m running from within a node.js script using process.spawn(). Since CasperJS doesn\'t support require()

Answer 1

I've actually written a Node library for exactly this purpose, it's called stream-splitter and you can find it on Github: samcday/stream-splitter.

The library provides a special Stream you can pipe your casper stdout into, along with a delimiter (in your case, \n), and it will emit neat token events, one for each line it has split out from the input Stream. The internal implementation for this is very simple, and delegates most of the magic to substack/node-buffers which means there's no unnecessary Buffer allocations/copies.