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from io import BytesIO
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import qrcode
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from flask import send_file, flash
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def generate_qr_code(url):
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qr = qrcode.QRCode(
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version=None,
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error_correction=qrcode.constants.ERROR_CORRECT_M,
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box_size=30,
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border=4,
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)
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qr.add_data(url)
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qr.make(fit=True)
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return qr.make_image(fill_color='black', back_color='white')
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def serve_pil_image(pil_img):
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# Source: https://stackoverflow.com/questions/7877282/how-to-send-image-generated-by-pil-to-browser
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img_io = BytesIO()
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pil_img.save(img_io, 'PNG', quality=70)
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img_io.seek(0)
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return send_file(img_io, mimetype='image/png')
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def flash_errors(form):
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"""Flashes form errors"""
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print('a')
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for field, errors in form.errors.items():
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for error in errors:
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flash(u"Error in the %s field - %s" % (
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getattr(form, field).label.text,
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error
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), 'error')
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