Readable QR codes in Terminal

Native RQR Functionality

# as of rqrcode 10.0 (Feb 2016), it can natively render ANSI making my code irrelevant:

require 'rubygems'
require 'rqrcode'

puts RQRCode::QRCode.new("http://www.example.com/").as_ansi

Readable QR code in Terminal

# By: Pablo Averbuj - 2014/01/21 - Public Domain
require 'rubygems'
require 'rqrcode' # install this gem
require 'colorize' # install this gem

b = "  ".colorize(:background => :black)
w = "  ".colorize(:background => :white)
url = "http://www.google.com/"
# you may have to increase the :size parameter (and the w * 51 correspondingly) depending of the content you're encoding
qr = RQRCode::QRCode.new(url, :size => 8)
puts w * 51; qr.to_s(:true => b, :false => w).split("\n").each{|l| puts w + l + w } ; puts w * 51

Readable QR with autosizing

# By: Pablo Averbuj - 2016/08/03 - Public Domain
# Modification with autosizing for URL
require 'rubygems'
require 'rqrcode' # install this gem
require 'colorize' # install this gem

def drawQR (url)
  b = "  ".colorize(:background => :black)
  w = "  ".colorize(:background => :white)
  qr=nil
  size=1
  while qr.nil? do
    size += 1
    begin
      qr = RQRCode::QRCode.new(url, :size => size)
      puts w * (19+size*4); qr.to_s(:true => b, :false => w).split("\n").each{|l| puts w + l + w } ; puts w * (19+size*4)
    rescue RQRCode::QRCodeRunTimeError
    end
  end
end

drawQR("http://www.google.com")