Is there any rails QR code plugin for Rails 3?

I want to generate QR code for my application which is going to run in Rails 3.0, Is there any plugin available for that ?

Thanks in Advance, J开发者_如何学Pythonak.

You can use Google's Chart API

  def generate_qr_image( url )
    raw "http://chart.apis.google.com/chart?chs=150x150&cht=qr&chl=#{url}&choe=UTF-8"
  end

I think Google changed the api end point.

This worked for me:

= image_tag "https://chart.googleapis.com/chart?chs=150x150&cht=qr&chl=#{url}&choe=UTF-8"

As I understand it, anything based on google charts is deprecated, so not a long term solution.

I've used both the rqrcode gem and one of the many javascript encoders.

I Agree with TrAvid but it won't work, just need a small minute change,

Just assign @url="www.google.com" in the controller and then use this @url in View as

<%= image_tag "https://chart.googleapis.com/chart?chs=150x150&cht=qr&chl=#{@url}&choe=UTF-8" %>

It worked for me great.

I use the rqrcode_png that allow you to save the code as an image or do it like a table. It also let you display the image without saving it.

Here is an example of how save the image

    qr = RQRCode::QRCode.new( 'your string', :size => 1, :level => :h )
    image = qr.to_img.resize(250,250)
    image.save('name.png')

or if you don't want to save it you can

     qr = RQRCode::QRCode.new( 'your string', :size => 1, :level => :h )
     @png = qr.to_img.resize(250,250).to_data_url 

and then in your view <%= image_tag @png %>