qrcode

[Fabiano Almeida]

Hi all!

How to dynamically generate qr code in web2py?

grateful,

Fabiano.

[Niphlod]

with any qrcode library or qrcode ondemand service out there ? What did you try ?

[黄祥]

i think there is web2py appliances that create some thing like this before : semanticwebexample

best regards,

stifan

[Richard Vézina]

You can have a look on the side of elaphe : https://bitbucket.org/whosaysni/elaphe/

For most type of code it works... But there were issue with bouding box for some of them in the pass, hope it has been solve since then...

Richard

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Resources:
- http://web2py.com
- http://web2py.com/book (Documentation)
- http://github.com/web2py/web2py (Source code)
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[Michael M]

def qrpage():

    #Install Python Modules: (Pillow,qrcode)

    #https://github.com/lincolnloop/python-qrcode

    

    ToQRData = auth.user.username + ' Likes MLP:FIM'

    import qrcode

    import StringIO

    qr = qrcode.QRCode(

        version=1,

        error_correction=qrcode.constants.ERROR_CORRECT_L,

        box_size=10,

        border=1,

    )

    qr.add_data(ToQRData)

    qr.make(fit=True)

    # use an in-memory object to save

    output = StringIO.StringIO()

    img = qr.make_image()

    img.save(output)

    # and the use getvalue() method to get the string

    img_tag = '<img src="data:image/png;base64,%s">' % output.getvalue().encode('base64').replace('\n', '')

    return locals()

[Fabiano Almeida]

Hi Niphlod,

I trying to generate qr code with built-in feature, for local use, mobile for reading.

thx

--

[Fabiano Almeida]

Hi Stifan

I installed the semanticwebexample and not found reference to qr code on it.

thx

--

[Fabiano Almeida]

Hi Richard,

elaphe worked! thank you!

How to show a text message with qrcode on same page?

Thx

[Fabiano Almeida]

Hi Michael,

With your example, return this:

Qrpage

StringIO	:	<module 'StringIO' from '/usr/lib/python2.7/StringIO.pyc'>
ToQRData	:	Fabiano Likes MLP:FIM
img	:	<qrcode.image.pil.PilImage object at 0x7f02d1c0a9d0>
img_tag	:	<img src="data:image/png;base64,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">
output	:	<StringIO.StringIO instance at 0x7f02d1be67e8>
qr	:	<qrcode.main.QRCode instance at 0x7f02d1bf40e0>
qrcode	:	<module 'qrcode' from '/usr/local/lib/python2.7/dist-packages/qrcode-5.1-py2.7.egg/qrcode/__init__.pyc'>

How to show de picture + text message?

thx

--

[Carlos Costa]

http://www.web2pyslices.com/slice/show/1462/qr-code-builder-with-web2py

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Resources:
- http://web2py.com
- http://web2py.com/book (Documentation)
- http://github.com/web2py/web2py (Source code)
- https://code.google.com/p/web2py/issues/list (Report Issues)
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--

Carlos J. Costa

Cientista da Computação  | BS Computer Science
Esp. Gestão em Telecom   | PgC Telecom Mangement

<º))><

[Michael M]

create a default/qrpage.html

insert this   {{=XML(img_tag)}}

[Fabiano Almeida]

Hi Michael,

2015-10-14 16:00 GMT-03:00 Michael M <prea...@gmail.com>:

{{=XML(img_tag)}}

It worked! Grateful for all!

Fabiano.

[Michael M]

Glad it worked for you!

I like the method that I found(just took three working pieces and pushed together) because no static files are generated using StringIO memory and encoding it with Base64.  (as far as I know)  ;)

[isi_jca]

Hi!!!.

When I try to print qrcode image to pdf using pyfpdf, I get the next error:

<type 'exceptions.RuntimeError'> FPDF error: Unsupported image type: pilimage object at 0x7f2e82f13a50>

Versión

web2py™ Version 2.14.5-stable+timestamp.2016.04.14.03.26.16

Python Python 2.7.6: /usr/bin/python (prefix: /usr)

 

Anyone have experience with this topic?

Regards.

[Jorge Luis Hernández Dueñas]

Hi, I have the same error, I try to save a qr image and I have tried it in many ways but it keeps giving me error. Please, if you solved it, it would be very helpful for me.

[isi_jca]

Hi!!!

I solved the problem using reportlab https://www.reportlab.com/docs/reportlab-userguide.pdf

Look at this examples, http://www.web2pyslices.com/slice/show/1562/pdf-with-reportlab

http://www.web2pyslices.com/slice/show/1564/pdf-with-reportlab-ii

Regards.