Please find below some of the most popular articles I've written on Gary's Guide To Nodejs.

In building a website scraper with Chrome and Node.js, I made mistakes that led to connection leaks. In this application, the scraper runs in a browser and connects to a node.js server, which saves data off to a database. Once you know what the issues look like, they are easy to see, but otherwise often difficult [...] Read More...

After doing “npm install forever” in a VirtualBox instance you may get an error like the following. This is caused by running the install from a folder shared with the host machine. Certain file operations fail when crossing the machine/file system boundary in VirtualBox. npm ERR! error rolling back [email protected] Error: UNKNOWN, unlink '/vagrant/node_modules/forever/node_modules/winston/docs/winston/transports.html' npm [...] Read More...

PhantomJS is a headless WebKit, which lets you run Javascript in a browser from the command line. It adds additional API calls which facilitate automated testing, screenshots, and scraping. I thought it would be interesting to write a script to retrieve Adsense destination URLs and text with PhantomJS. Extracting advertisement blocks requires fairly simple CSS [...] Read More...