Running Phantomjs from a Ruby on Rails Application

Running phantomjs from a Ruby on Rails application

Use backticks in your ruby code e.g.:

output = `phantomjs rasterize.js http://raphaeljs.com/polar-clock.html clock.png`

Using PhantomJS in Ruby on Rails application

To initialize a capybara session in your app you can just do something like

session = Capybara::Session.new(:poltergeist)

( as documented here) and then rather than using page just call Capybara methods on session. One thing to note is that if you're going to test the app with Capybara too you will probably want to register a separate driver for the app and testing - https://github.com/jnicklas/capybara#configuring-and-adding-drivers . Also since Capybaras config is not thread-safe changing any of Capybaras setting would potentially affect both the test session and the in app session.

Deploying PhantomJS or headless gem on Engine Yard

I suggest the PhantomJS gem. It automatically installs PhantomJS the first time it's used, in a private location whose location you can get from an API. It provides a recent PhantomJS, currently 2.1.1. It works for me on both MacOS and Linux.

I haven't used that gem on Engine Yard, but I don't think there should be any Engine Yard-specific issues.

I use Cucumber, Capybara and poltergeist, so I have this in features/support/poltergeist.rb:

require 'capybara/poltergeist'
Capybara.javascript_driver = :poltergeist
Capybara.register_driver :poltergeist do |app|
  Capybara::Poltergeist::Driver.new(app, phantomjs: Phantomjs.path)
end

Using Selenium-Webdriver directly, I'd expect what rantingsonrails suggested would work:

Selenium::WebDriver::PhantomJS.path = Phantomjs.path

Rails/Poltergiest/PhantomJS not loading files in application.js during testing

I can think of two possible causes for this. The first would be a syntax error in a previous included JS file preventing the following files from being processed when they all get concatenated together. Since the file thats not working is the first file required it's probably not that. The second cause is that you have precompiled assets at some point, and have a manifest file in public/assets (probably something like public/assets/.sprockets-manifest-*.json) which can prevent the test environment from rebuilding and serving the latest version of the assets. Try deleting the file, or run rake assets:clobber

PhantomJS script hangs when executed from Rails controller on localhost

You have to use a multi-threaded web server like puma.

See here for an overview of different options.

Another pitfall might be your controller logic. If the page, that gets rendered by phantom, triggers the same controller action than the one, that calls phantom, you create an infinite loop.

Then, even a multi-threaded server would get stuck :)

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this question is a duplicate of PhantomJS.rb freezing when trying to screen capture page in my rails application
Please close this one. I'm lacking reputation to do so or write this as a comment.

phantomjs: How to run phantomjs command when Url with queryparams

You need to protect all & chars with a backslash :

phantomjs  rasterize.js http://www.myurl.com?q=123\&s=foo form1.pdf

Ampersand is annoying in console so you need to protect it like above. In a ruby script you need to protect backslash that protect & :

`phantomjs  rasterize.js http://www.myurl.com?q=123\\&s=foo form1.pdf`

example :

`phantomjs rasterize.js https://www.google.fr/search?q=rasterize.js+special+char\\&oq=rasterize.js google1.pdf`

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