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# Script that uses the ferrum gem to generate screenshots from a headless browser
require 'ferrum'
require 'optparse'
options = {show_help: false, out: "out.png"}
opts = OptionParser.new do |o|
o.banner = "Usage: #{File.basename($0)} [options]\n\n"
o.on("--url str","-u", "Fetch URL") do |url|
options[:url] = url
end
o.on("--out str","-o", "Output file") do |out|
options[:out] = out
end
o.on("--extract str", "Extract dimensions") do |dim|
options[:extract] = dim
end
o.on_tail('-h', '--help', 'Display this help and exit') do
options[:show_help] = true
end
end
begin
opts.parse!(ARGV)
if options[:show_help]
print opts
print USAGE
exit 0
end
rescue OptionParser::InvalidOption => e
options[:invalid_argument] = e.message
end
print("\nProcessing #{options[:url]}...")
browser = Ferrum::Browser.new
browser.timeout = 20
browser.go_to(options[:url])
browser.screenshot(path: options[:out])
browser.quit
if options[:extract]
print `convert -extract #{options[:extract]} #{options[:out]} convert.png`
File.rename("convert.png",options[:out])
end
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