/html2pdf

HTML in, PDF out

Primary LanguageRubyThe UnlicenseUnlicense

H2P: HTML in, PDF out

H2P takes an HTML blob, uses wkhtmltopdf to convert it to PDF, and returns a PDF blob.

Installation

gem install 'h2p'

# you'll also need to have wkhtmltopdf installed:
gem install 'wkhtmltopdf-binary'

Or just use the source™️.

Usage

...
my_html = '<html><body><h1>Hello, world!</h1></body></html>'
my_pdf = H2P.convert(my_html)
...

Use the source

If you don't want to add another dependency to your project, here's the source of the present gem (with the modulation dependency removed.) Feel free to use and manipulate however you please:

# This is free and unencumbered software released into the public domain
# Full license here: https://unlicense.org/

require 'tmpdir'
require 'fileutils'

module H2P
  def self.tmp_path(ext)
    stamp = Time.now.to_f
    @counter ||= 0
    File.join(Dir.tmpdir, "h2p-#{stamp}-#{@counter += 1}.#{ext}")
  end

  def self.convert(html)
    html_path = tmp_path(:html)
    pdf_path = tmp_path(:pdf)
    File.open(html_path, 'w+') { |f| f << html }
    system('wkhtmltopdf', '-q', html_path, pdf_path)
    IO.read(pdf_path)
  ensure
    FileUtils.rm(html_path) rescue nil
    FileUtils.rm(pdf_path) rescue nil
  end
end