2014-04-02 12:45:29 +08:00
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class QrcodesController < ApplicationController
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def show
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str = params[:str].to_s
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2014-04-02 13:37:02 +08:00
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max_length = 200
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2014-04-02 12:45:29 +08:00
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if str.length > max_length
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render nothing: true, status: 404
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return
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end
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require 'rqrcode/export/png'
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qr = RQRCode::QRCode.new(str)
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response.headers['Cache-Control'] = "public, max-age=#{12.hours.to_i}"
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response.headers['Content-Type'] = 'image/png'
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response.headers['Content-Disposition'] = 'inline'
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render :text => qr.as_png
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end
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end
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