phantomjs

phantomjs

An NPM wrapper for PhantomJS, headless webkit with JS API.

Building and Installing

npm install phantomjs

Or grab the source and

node ./install.js

To use a mirror of the phantomjs binaries, set $PHANTOMJS_CDNURL, default is https://bitbucket.org/ariya/phantomjs/downloads

PHANTOMJS_CDNURL=http://cnpmjs.org/downloads npm install phantomjs

What this installer is really doing is just grabbing a particular "blessed" (by this module) version of Phantom. As new versions of Phantom are released and vetted, this module will be updated accordingly.

The package has been set up to fetch and run Phantom for MacOS (darwin), Linux based platforms (as identified by nodejs), and -- as of version 0.2.0 -- Windows (thanks to Domenic Denicola). If you spot any platform weirdnesses, let us know or send a patch.

Running

bin/phantomjs [phantom arguments]

And npm will install a link to the binary in node_modules/.bin as it is wont to do.

Running via node

The package exports a path string that contains the path to the phantomjs binary/executable.

Below is an example of using this package via node.

var path = require('path')
var childProcess = require('child_process')
var phantomjs = require('phantomjs')
var binPath = phantomjs.path

var childArgs = [
  path.join(__dirname, 'phantomjs-script.js'),
  'some other argument (passed to phantomjs script)'
]

childProcess.execFile(binPath, childArgs, function(err, stdout, stderr) {
  // handle results
})

Versioning

The major and minor number tracks the version of PhantomJS that will be installed. The patch number is incremented when there is either an installer update or a patch build of the phantom binary.

A Note on PhantomJS

PhantomJS is not a library for NodeJS. It's a separate environment and code written for node is unlikely to be compatible. In particular PhantomJS does not expose a Common JS package loader.

This is an NPM wrapper and can be used to conveniently make Phantom available It is not a Node JS wrapper.

I have had reasonable experiences writing standalone Phantom scripts which I then drive from within a node program by spawning phantom in a child process.

Read the PhantomJS FAQ for more details: http://phantomjs.org/faq.html

Linux Note

An extra note on Linux usage, from the PhantomJS download page:

This package is built on CentOS 5.8. It should run successfully on Lucid or more modern systems (including other distributions). There is no requirement to install Qt, WebKit, or any other libraries. It is however expected that some base libraries necessary for rendering (FreeType, Fontconfig) and the basic font files are available in the system.

Troubleshooting

Installation fails with Error: read ECONNRESET or Error: connect ETIMEDOUT

This error means that something went wront with your internet connection, and the installer was not able to download the PhantomJS binary for your platform. Please try again.

I tried again, but I get ECONNRESET or ETIMEDOUT consistently.

Do you live in China, or a country with an authoritarian government? We've seen problems where the GFW or local ISP blocks bitbucket, preventing the installer from downloading the binary.

Try visiting the the download page manually. If that page is blocked, you can try using a different CDN with the PHANTOMJS_CDNURL env variable described above.

I am behind a corporate proxy that uses self-signed SSL certificates to intercept encrypted traffic.

You can tell NPM and the PhantomJS installer to skip validation of ssl keys with NPM's strict-ssl setting:

npm set strict-ssl false

WARNING: Turning off strict-ssl leaves you vulnerable to attackers reading your encrypted traffic, so run this at your own risk!

I tried everything, but my network is b0rked. What do I do?

If you install PhantomJS manually, and put it on PATH, the installer will try to use the manually-installed binaries.

I'm on Debian or Ubuntu, and the installer failed because it couldn't find node

Some Linux distros tried to rename node to nodejs due to a package conflict. This is a non-portable change, and we do not try to support this. The official documentation recommends that you symlink node to nodejs on those platforms, or many NodeJS programs won't work properly.

Contributing

Questions, comments, bug reports, and pull requests are all welcome. Submit them at the project on GitHub. If you haven't contributed to an Obvious project before please head over to the Open Source Project and fill out an OCLA (it should be pretty painless).

Bug reports that include steps-to-reproduce (including code) are the best. Even better, make them in the form of pull requests.

Author

Dan Pupius (personal website), supported by The Obvious Corporation.

License

Copyright 2012 The Obvious Corporation.

Licensed under the Apache License, Version 2.0. See the top-level file LICENSE.txt and (http://www.apache.org/licenses/LICENSE-2.0).