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< p > date: 2021-04-19< / p >
< h2 id = "introduction" > < strong > Introduction< / strong > < / h2 >
< p > I worked out a solution in django-testing, for testing a view that renders a qrcode
as an svg as an inline svg xml string.< / p >
< p > In case you are not familiar with
< a href = "https://en.wikipedia.org/wiki/Scalable_Vector_Graphics" target = "_blank" > svg< / a > ,
scalable vector graphics, it is an image that is
completely rendered from a
< a href = "https://en.wikipedia.org/wiki/String_(computer_science)" target = "_blank" > string< / a >
of text, or more accurately < a href = "https://en.wikipedia.org/wiki/XML" target = "_blank" > XML< / a >
text, unlike < a href = "https://en.wikipedia.org/wiki/Portable_Network_Graphics" target = "_blank" > PNG< / a >
or < a href = "https://en.wikipedia.org/wiki/JPEG" target = "_blank" > JPG< / a > , which are
< a href = "https://en.wikipedia.org/wiki/Binary_file" target = "_blank" > binary file< / a > s.< / p >
< h3 id = "python-libraries-used" > Python Libraries Used< / h3 >
< ul >
< li > < a href = "https://pypi.org/project/beautifulsoup4/" target = "_blank" > BeautifulSoup< / a >
to consume html< / li >
< li > < a href = "https://pypi.org/project/CairoSVG/" target = "_blank" > CairoSVG< / a >
to convert svg to png< / li >
< li > < a href = "https://pypi.org/project/Pillow/" target = "_blank" > python-pillow< / a >
to convert transparent png background to white< / li >
< li > < a href = "https://pypi.org/project/opencv-python/" target = "_blank" > opencv-python< / a >
to extract data from qrcode< / li >
< li > < a href = "https://pypi.org/project/pyotp/" target = "_blank" > python-pyotp< / a > < / li >
< / ul >
< h2 id = "form-screenshot" > < strong > Form ScreenShot< / strong > < / h2 >
< p > This is the form we will be testing.< / p >
< p > In real life you would confirm that you want to use
< a href = "https://en.wikipedia.org/wiki/Multi-factor_authentication" target = "_blank" > two-factor-authentication< / a >
by scanning the qrcode with an
< a href = "https://play.google.com/store/apps/details?id=org.shadowice.flocke.andotp" target = "_blank" > authentication app< / a >
on your smartphone, and then enter the
< a href = "https://en.wikipedia.org/wiki/Time-based_One-Time_Password" target = "_blank" > time-based one-time password< / a > .< / p >
< p > totp codes are derived from two things and two things only. A secret key and a time such as the current time.
For instance, an authentication application can tell you what your totp code is, but of course
in this testing scenario we use
< a href = "https://pypi.org/project/pyotp/" target = "_blank" > python-pyotp< / a > , after extracting
the secret key from the qrcode.< / p >
< div align = "center" >
< em > enable totp confirmation form< / em >
< / div >
< p > < img alt = ""ScreenShot of a confirmation form for enabling totp (in a django app)"" class = "center" src = "../../photos/IMG_screenshot_enable_totp_confirmation_form.jpg" / > < / p >
< h2 id = "import-python-libraries" > < strong > Import Python Libraries< / strong > < / h2 >
< div class = "highlight" > < pre > < span > < / span > < code > < span class = "c1" > # tp/accounts/tests/test_enable_totp_view.py< / span >
< span class = "c1" > # python manage.py test accounts.tests.test_enable_totp_view< / span >
< span class = "kn" > from< / span > < span class = "nn" > django.test< / span > < span class = "kn" > import< / span > < span class = "n" > TestCase< / span >
< span class = "kn" > from< / span > < span class = "nn" > django.contrib.auth.models< / span > < span class = "kn" > import< / span > < span class = "n" > User< / span >
< span class = "kn" > from< / span > < span class = "nn" > accounts.models< / span > < span class = "kn" > import< / span > < span class = "n" > Account< / span >
< span class = "kn" > from< / span > < span class = "nn" > django.urls< / span > < span class = "kn" > import< / span > < span class = "n" > reverse< / span >
< span class = "kn" > from< / span > < span class = "nn" > bs4< / span > < span class = "kn" > import< / span > < span class = "n" > BeautifulSoup< / span >
< span class = "kn" > import< / span > < span class = "nn" > cv2< / span >
< span class = "kn" > from< / span > < span class = "nn" > cairosvg< / span > < span class = "kn" > import< / span > < span class = "n" > svg2png< / span >
< span class = "kn" > from< / span > < span class = "nn" > PIL< / span > < span class = "kn" > import< / span > < span class = "n" > Image< / span >
< span class = "kn" > import< / span > < span class = "nn" > pyotp< / span >
< span class = "kn" > import< / span > < span class = "nn" > pathlib< / span >
< / code > < / pre > < / div >
< p > The Account model has a one-to-one relationship with the Django built-in
User model. This is where we keep track of the totp secret key and
boolean value for having totp authentication enabled.< / p >
< h2 id = "setup-testcase" > < strong > setUp TestCase< / strong > < / h2 >
< div class = "highlight" > < pre > < span > < / span > < code > < span class = "o" > ...< / span >
< span class = "kn" > import< / span > < span class = "nn" > pathlib< / span >
< span class = "k" > class< / span > < span class = "nc" > TestEnableTOTPViewTestCase< / span > < span class = "p" > (< / span > < span class = "n" > TestCase< / span > < span class = "p" > ):< / span >
< span class = "k" > def< / span > < span class = "nf" > setUp< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "p" > ):< / span >
< span class = "n" > user_a< / span > < span class = "o" > =< / span > < span class = "n" > User< / span > < span class = "o" > .< / span > < span class = "n" > objects< / span > < span class = "o" > .< / span > < span class = "n" > create< / span > < span class = "p" > (< / span >
< span class = "n" > username< / span > < span class = "o" > =< / span > < span class = "s1" > ' user_a' < / span > < span class = "p" > )< / span >
< span class = "n" > user_a< / span > < span class = "o" > .< / span > < span class = "n" > set_password< / span > < span class = "p" > (< / span > < span class = "s1" > ' password_user_a' < / span > < span class = "p" > )< / span >
< span class = "n" > user_a< / span > < span class = "o" > .< / span > < span class = "n" > save< / span > < span class = "p" > ()< / span >
< span class = "n" > Account< / span > < span class = "o" > .< / span > < span class = "n" > objects< / span > < span class = "o" > .< / span > < span class = "n" > create< / span > < span class = "p" > (< / span > < span class = "n" > user< / span > < span class = "o" > =< / span > < span class = "n" > user_a< / span > < span class = "p" > )< / span >
< / code > < / pre > < / div >
< p > We create a test user and save that in the test database.< / p >
< h2 id = "get-form" > < strong > GET Form< / strong > < / h2 >
< p > < div class = "highlight" > < pre > < span > < / span > < code > < span class = "k" > class< / span > < span class = "nc" > TestEnableTOTPViewTestCase< / span > < span class = "p" > (< / span > < span class = "n" > TestCase< / span > < span class = "p" > ):< / span >
< span class = "o" > ...< / span >
< span class = "k" > def< / span > < span class = "nf" > test_enable_totp_view< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "p" > ):< / span >
< span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > client< / span > < span class = "o" > .< / span > < span class = "n" > login< / span > < span class = "p" > (< / span >
< span class = "n" > username< / span > < span class = "o" > =< / span > < span class = "s1" > ' user_a' < / span > < span class = "p" > ,< / span >
< span class = "n" > password< / span > < span class = "o" > =< / span > < span class = "s1" > ' password_user_a' < / span >
< span class = "p" > )< / span >
< span class = "n" > get_response< / span > < span class = "o" > =< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > client< / span > < span class = "o" > .< / span > < span class = "n" > get< / span > < span class = "p" > (< / span >
< span class = "n" > reverse< / span > < span class = "p" > (< / span > < span class = "s1" > ' accounts:enable_totp' < / span > < span class = "p" > )< / span >
< span class = "p" > )< / span >
< span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > assertEquals< / span > < span class = "p" > (< / span >
< span class = "n" > get_response< / span > < span class = "o" > .< / span > < span class = "n" > status_code< / span > < span class = "p" > ,< / span > < span class = "mi" > 200< / span >
< span class = "p" > )< / span >
< span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > assertTemplateUsed< / span > < span class = "p" > (< / span >
< span class = "n" > get_response< / span > < span class = "p" > ,< / span > < span class = "s1" > ' accounts/totp_form.html' < / span >
< span class = "p" > )< / span >
< span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > assertEquals< / span > < span class = "p" > (< / span >
< span class = "n" > get_response< / span > < span class = "o" > .< / span > < span class = "n" > request< / span > < span class = "p" > [< / span > < span class = "s1" > ' PATH_INFO' < / span > < span class = "p" > ],< / span >
< span class = "s1" > ' /accounts/enable-totp/' < / span >
< span class = "p" > )< / span >
< / code > < / pre > < / div >
The TestCase requires two requests. In the first request we GET the form
so that we can consume the qrcode.< / p >
< h2 id = "consume-svg-with-beautifulsoup" > < strong > Consume SVG with BeautifulSoup< / strong > < / h2 >
< p > < div class = "highlight" > < pre > < span > < / span > < code > < span class = "k" > class< / span > < span class = "nc" > TestEnableTOTPViewTestCase< / span > < span class = "p" > (< / span > < span class = "n" > TestCase< / span > < span class = "p" > ):< / span >
< span class = "o" > ...< / span >
< span class = "k" > def< / span > < span class = "nf" > test_enable_totp_view< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "p" > ):< / span >
< span class = "o" > ...< / span >
< span class = "n" > soup< / span > < span class = "o" > =< / span > < span class = "n" > BeautifulSoup< / span > < span class = "p" > (< / span >
< span class = "n" > get_response< / span > < span class = "o" > .< / span > < span class = "n" > content< / span > < span class = "p" > ,< / span > < span class = "n" > features< / span > < span class = "o" > =< / span > < span class = "s2" > " lxml" < / span >
< span class = "p" > )< / span >
< span class = "n" > svg_container< / span > < span class = "o" > =< / span > < span class = "n" > soup< / span > < span class = "o" > .< / span > < span class = "n" > find< / span > < span class = "p" > (< / span >
< span class = "s2" > " div" < / span > < span class = "p" > ,< / span > < span class = "p" > {< / span > < span class = "s2" > " id" < / span > < span class = "p" > :< / span > < span class = "s2" > " svgcontainer" < / span > < span class = "p" > }< / span >
< span class = "p" > )< / span >
< span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > assertIsNotNone< / span > < span class = "p" > (< / span > < span class = "n" > svg_container< / span > < span class = "p" > )< / span >
< span class = "n" > scsvg< / span > < span class = "o" > =< / span > < span class = "n" > svg_container< / span > < span class = "o" > .< / span > < span class = "n" > findChild< / span > < span class = "p" > (< / span >
< span class = "s2" > " svg" < / span > < span class = "p" > ,< / span > < span class = "n" > recursive< / span > < span class = "o" > =< / span > < span class = "kc" > False< / span >
< span class = "p" > )< / span >
< span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > assertIsNotNone< / span > < span class = "p" > (< / span > < span class = "n" > scsvg< / span > < span class = "p" > )< / span >
< span class = "k" > with< / span > < span class = "nb" > open< / span > < span class = "p" > (< / span > < span class = "s1" > ' qr.svg' < / span > < span class = "p" > ,< / span > < span class = "s1" > ' w' < / span > < span class = "p" > )< / span > < span class = "k" > as< / span > < span class = "n" > f< / span > < span class = "p" > :< / span >
< span class = "n" > x_string< / span > < span class = "o" > =< / span > < span class = "s2" > " < ?xml version=' 1.0' " < / span >
< span class = "n" > x_string< / span > < span class = "o" > +=< / span > < span class = "s2" > " encoding=' utf-8' ?> < / span > < span class = "se" > \n< / span > < span class = "s2" > " < / span >
< span class = "n" > f< / span > < span class = "o" > .< / span > < span class = "n" > write< / span > < span class = "p" > (< / span > < span class = "n" > x_string< / span > < span class = "o" > +< / span > < span class = "nb" > str< / span > < span class = "p" > (< / span > < span class = "n" > scsvg< / span > < span class = "p" > ))< / span >
< / code > < / pre > < / div >
The inline xml for the svg comes to us as a child of a
< code > div< / code > with an < code > id< / code > of < em > svgcontainer< / em > . We capture the xml of the svg in the variable
< code > scsvg< / code > , and then write it out to disc.< / p >
< h2 id = "svg2png" > < strong > svg2png< / strong > < / h2 >
< p > < div class = "highlight" > < pre > < span > < / span > < code > < span class = "k" > class< / span > < span class = "nc" > TestEnableTOTPViewTestCase< / span > < span class = "p" > (< / span > < span class = "n" > TestCase< / span > < span class = "p" > ):< / span >
< span class = "o" > ...< / span >
< span class = "k" > def< / span > < span class = "nf" > test_enable_totp_view< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "p" > ):< / span >
< span class = "o" > ...< / span >
< span class = "n" > svg2png< / span > < span class = "p" > (< / span >
< span class = "n" > url< / span > < span class = "o" > =< / span > < span class = "s1" > ' qr.svg' < / span > < span class = "p" > ,< / span > < span class = "n" > write_to< / span > < span class = "o" > =< / span > < span class = "s1" > ' qr.png' < / span > < span class = "p" > ,< / span >
< span class = "n" > scale< / span > < span class = "o" > =< / span > < span class = "mi" > 8< / span >
< span class = "p" > )< / span >
< / code > < / pre > < / div >
With svg2png from CairoSVG, we convert the svg to png format. Opencv seems
unable to consume the qrcode unless you scale it up.< / p >
< h2 id = "add-white-background" > < strong > Add White Background< / strong > < / h2 >
< p > < div class = "highlight" > < pre > < span > < / span > < code > < span class = "k" > class< / span > < span class = "nc" > TestEnableTOTPViewTestCase< / span > < span class = "p" > (< / span > < span class = "n" > TestCase< / span > < span class = "p" > ):< / span >
< span class = "o" > ...< / span >
< span class = "k" > def< / span > < span class = "nf" > test_enable_totp_view< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "p" > ):< / span >
< span class = "o" > ...< / span >
< span class = "n" > t_image< / span > < span class = "o" > =< / span > < span class = "n" > Image< / span > < span class = "o" > .< / span > < span class = "n" > open< / span > < span class = "p" > (< / span > < span class = "s1" > ' qr.png' < / span > < span class = "p" > )< / span >
< span class = "n" > t_image< / span > < span class = "o" > .< / span > < span class = "n" > load< / span > < span class = "p" > ()< / span >
< span class = "n" > background< / span > < span class = "o" > =< / span > < span class = "n" > Image< / span > < span class = "o" > .< / span > < span class = "n" > new< / span > < span class = "p" > (< / span >
< span class = "s2" > " RGB" < / span > < span class = "p" > ,< / span > < span class = "n" > t_image< / span > < span class = "o" > .< / span > < span class = "n" > size< / span > < span class = "p" > ,< / span >
< span class = "p" > (< / span > < span class = "mi" > 255< / span > < span class = "p" > ,< / span > < span class = "mi" > 255< / span > < span class = "p" > ,< / span > < span class = "mi" > 255< / span > < span class = "p" > )< / span >
< span class = "p" > )< / span >
< span class = "n" > background< / span > < span class = "o" > .< / span > < span class = "n" > paste< / span > < span class = "p" > (< / span >
< span class = "n" > t_image< / span > < span class = "p" > ,< / span >
< span class = "n" > mask< / span > < span class = "o" > =< / span > < span class = "n" > t_image< / span > < span class = "o" > .< / span > < span class = "n" > split< / span > < span class = "p" > ()[< / span > < span class = "mi" > 3< / span > < span class = "p" > ]< / span >
< span class = "p" > )< / span >
< span class = "n" > background< / span > < span class = "o" > .< / span > < span class = "n" > save< / span > < span class = "p" > (< / span >
< span class = "s1" > ' qr.jpg' < / span > < span class = "p" > ,< / span > < span class = "s2" > " JPEG" < / span > < span class = "p" > ,< / span >
< span class = "n" > quality< / span > < span class = "o" > =< / span > < span class = "mi" > 100< / span >
< span class = "p" > )< / span >
< / code > < / pre > < / div >
We use Image from python-pillow to change the background from transparent
to white. Opencv seems unable to consume the qrcode when it has a transparent
background.< / p >
< h2 id = "extract-data-from-qrcode" > < strong > Extract Data From QRCODE< / strong > < / h2 >
< div class = "highlight" > < pre > < span > < / span > < code > < span class = "k" > class< / span > < span class = "nc" > TestEnableTOTPViewTestCase< / span > < span class = "p" > (< / span > < span class = "n" > TestCase< / span > < span class = "p" > ):< / span >
< span class = "o" > ...< / span >
< span class = "k" > def< / span > < span class = "nf" > test_enable_totp_view< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "p" > ):< / span >
< span class = "o" > ...< / span >
< span class = "n" > image< / span > < span class = "o" > =< / span > < span class = "n" > cv2< / span > < span class = "o" > .< / span > < span class = "n" > imread< / span > < span class = "p" > (< / span > < span class = "s1" > ' qr.jpg' < / span > < span class = "p" > )< / span >
< span class = "n" > qr_det< / span > < span class = "o" > =< / span > < span class = "n" > cv2< / span > < span class = "o" > .< / span > < span class = "n" > QRCodeDetector< / span > < span class = "p" > ()< / span >
< span class = "n" > qrdata< / span > < span class = "o" > =< / span > < span class = "n" > qr_det< / span > < span class = "o" > .< / span > < span class = "n" > detectAndDecode< / span > < span class = "p" > (< / span > < span class = "n" > image< / span > < span class = "p" > )< / span >
< span class = "n" > totp_code< / span > < span class = "o" > =< / span > < span class = "n" > pyotp< / span > < span class = "o" > .< / span > < span class = "n" > TOTP< / span > < span class = "p" > (< / span >
< span class = "n" > pyotp< / span > < span class = "o" > .< / span > < span class = "n" > parse_uri< / span > < span class = "p" > (< / span > < span class = "n" > qrdata< / span > < span class = "p" > [< / span > < span class = "mi" > 0< / span > < span class = "p" > ])< / span > < span class = "o" > .< / span > < span class = "n" > secret< / span >
< span class = "p" > )< / span > < span class = "o" > .< / span > < span class = "n" > now< / span > < span class = "p" > ()< / span >
< / code > < / pre > < / div >
< ul >
< li > < code > qrdata[0]< / code > will be the < em > otpauth_uri< / em > .< / li >
< li > < code > pyotp.parse_uri(qrdata[0]).secret< / code > is the secret key.< / li >
< li > < code > totp_code< / code > is the one-time password.< / li >
< / ul >
< h2 id = "post-the-totp_code" > < strong > POST the < code > totp_code< / code > < / strong > < / h2 >
< p > < div class = "highlight" > < pre > < span > < / span > < code > < span class = "k" > class< / span > < span class = "nc" > TestEnableTOTPViewTestCase< / span > < span class = "p" > (< / span > < span class = "n" > TestCase< / span > < span class = "p" > ):< / span >
< span class = "o" > ...< / span >
< span class = "k" > def< / span > < span class = "nf" > test_enable_totp_view< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "p" > ):< / span >
< span class = "o" > ...< / span >
< span class = "n" > totp_code< / span > < span class = "o" > =< / span > < span class = "n" > pyotp< / span > < span class = "o" > .< / span > < span class = "n" > TOTP< / span > < span class = "p" > (< / span >
< span class = "n" > pyotp< / span > < span class = "o" > .< / span > < span class = "n" > parse_uri< / span > < span class = "p" > (< / span > < span class = "n" > qrdata< / span > < span class = "p" > [< / span > < span class = "mi" > 0< / span > < span class = "p" > ])< / span > < span class = "o" > .< / span > < span class = "n" > secret< / span >
< span class = "p" > )< / span > < span class = "o" > .< / span > < span class = "n" > now< / span > < span class = "p" > ()< / span >
< span class = "n" > response< / span > < span class = "o" > =< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > client< / span > < span class = "o" > .< / span > < span class = "n" > post< / span > < span class = "p" > (< / span >
< span class = "n" > reverse< / span > < span class = "p" > (< / span > < span class = "s1" > ' accounts:enable_totp' < / span > < span class = "p" > ),< / span >
< span class = "p" > {< / span > < span class = "s1" > ' totp_code' < / span > < span class = "p" > :< / span > < span class = "n" > totp_code< / span > < span class = "p" > },< / span >
< span class = "n" > follow< / span > < span class = "o" > =< / span > < span class = "kc" > True< / span >
< span class = "p" > )< / span >
< span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > assertEquals< / span > < span class = "p" > (< / span >
< span class = "n" > response< / span > < span class = "o" > .< / span > < span class = "n" > status_code< / span > < span class = "p" > ,< / span > < span class = "mi" > 200< / span >
< span class = "p" > )< / span >
< span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > assertTemplateUsed< / span > < span class = "p" > (< / span >
< span class = "n" > response< / span > < span class = "p" > ,< / span > < span class = "s1" > ' base_form.html' < / span >
< span class = "p" > )< / span >
< span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > assertEquals< / span > < span class = "p" > (< / span >
< span class = "n" > response< / span > < span class = "o" > .< / span > < span class = "n" > request< / span > < span class = "p" > [< / span > < span class = "s1" > ' PATH_INFO' < / span > < span class = "p" > ],< / span >
< span class = "s1" > ' /accounts/edit-profile/' < / span >
< span class = "p" > )< / span >
< span class = "n" > user_a< / span > < span class = "o" > =< / span > < span class = "n" > User< / span > < span class = "o" > .< / span > < span class = "n" > objects< / span > < span class = "o" > .< / span > < span class = "n" > get< / span > < span class = "p" > (< / span >
< span class = "n" > username< / span > < span class = "o" > =< / span > < span class = "s1" > ' user_a' < / span >
< span class = "p" > )< / span >
< span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > assertTrue< / span > < span class = "p" > (< / span > < span class = "n" > user_a< / span > < span class = "o" > .< / span > < span class = "n" > account< / span > < span class = "o" > .< / span > < span class = "n" > use_totp< / span > < span class = "p" > )< / span >
< span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > assertEquals< / span > < span class = "p" > (< / span >
< span class = "nb" > len< / span > < span class = "p" > (< / span > < span class = "n" > user_a< / span > < span class = "o" > .< / span > < span class = "n" > account< / span > < span class = "o" > .< / span > < span class = "n" > totp_key< / span > < span class = "p" > ),< / span > < span class = "mi" > 16< / span >
< span class = "p" > )< / span >
< span class = "n" > pathlib< / span > < span class = "o" > .< / span > < span class = "n" > Path< / span > < span class = "p" > (< / span > < span class = "s1" > ' qr.svg' < / span > < span class = "p" > )< / span > < span class = "o" > .< / span > < span class = "n" > unlink< / span > < span class = "p" > ()< / span >
< span class = "n" > pathlib< / span > < span class = "o" > .< / span > < span class = "n" > Path< / span > < span class = "p" > (< / span > < span class = "s1" > ' qr.png' < / span > < span class = "p" > )< / span > < span class = "o" > .< / span > < span class = "n" > unlink< / span > < span class = "p" > ()< / span >
< span class = "n" > pathlib< / span > < span class = "o" > .< / span > < span class = "n" > Path< / span > < span class = "p" > (< / span > < span class = "s1" > ' qr.jpg' < / span > < span class = "p" > )< / span > < span class = "o" > .< / span > < span class = "n" > unlink< / span > < span class = "p" > ()< / span >
< / code > < / pre > < / div >
Post the < code > totp_code< / code > back to the form, and then verify
that the database is updated, and then delete the image
files.< / p >
< h2 id = "complete-testcase" > < strong > Complete TestCase< / strong > < / h2 >
< div class = "highlight" > < pre > < span > < / span > < code > < span class = "c1" > # tp/accounts/tests/test_enable_totp_view.py< / span >
< span class = "c1" > # python manage.py test accounts.tests.test_enable_totp_view< / span >
< span class = "kn" > from< / span > < span class = "nn" > django.test< / span > < span class = "kn" > import< / span > < span class = "n" > TestCase< / span >
< span class = "kn" > from< / span > < span class = "nn" > django.contrib.auth.models< / span > < span class = "kn" > import< / span > < span class = "n" > User< / span >
< span class = "kn" > from< / span > < span class = "nn" > accounts.models< / span > < span class = "kn" > import< / span > < span class = "n" > Account< / span >
< span class = "kn" > from< / span > < span class = "nn" > django.urls< / span > < span class = "kn" > import< / span > < span class = "n" > reverse< / span >
< span class = "kn" > from< / span > < span class = "nn" > bs4< / span > < span class = "kn" > import< / span > < span class = "n" > BeautifulSoup< / span >
< span class = "kn" > import< / span > < span class = "nn" > cv2< / span >
< span class = "kn" > from< / span > < span class = "nn" > cairosvg< / span > < span class = "kn" > import< / span > < span class = "n" > svg2png< / span >
< span class = "kn" > from< / span > < span class = "nn" > PIL< / span > < span class = "kn" > import< / span > < span class = "n" > Image< / span >
< span class = "kn" > import< / span > < span class = "nn" > pyotp< / span >
< span class = "k" > class< / span > < span class = "nc" > TestEnableTOTPViewTestCase< / span > < span class = "p" > (< / span > < span class = "n" > TestCase< / span > < span class = "p" > ):< / span >
< span class = "c1" > # setUP TestCase< / span >
< span class = "k" > def< / span > < span class = "nf" > setUp< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "p" > ):< / span >
< span class = "n" > user_a< / span > < span class = "o" > =< / span > < span class = "n" > User< / span > < span class = "o" > .< / span > < span class = "n" > objects< / span > < span class = "o" > .< / span > < span class = "n" > create< / span > < span class = "p" > (< / span >
< span class = "n" > username< / span > < span class = "o" > =< / span > < span class = "s1" > ' user_a' < / span > < span class = "p" > )< / span >
< span class = "n" > user_a< / span > < span class = "o" > .< / span > < span class = "n" > set_password< / span > < span class = "p" > (< / span > < span class = "s1" > ' password_user_a' < / span > < span class = "p" > )< / span >
< span class = "n" > user_a< / span > < span class = "o" > .< / span > < span class = "n" > save< / span > < span class = "p" > ()< / span >
< span class = "n" > Account< / span > < span class = "o" > .< / span > < span class = "n" > objects< / span > < span class = "o" > .< / span > < span class = "n" > create< / span > < span class = "p" > (< / span > < span class = "n" > user< / span > < span class = "o" > =< / span > < span class = "n" > user_a< / span > < span class = "p" > )< / span >
< span class = "k" > def< / span > < span class = "nf" > test_enable_totp_view< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "p" > ):< / span >
< span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > client< / span > < span class = "o" > .< / span > < span class = "n" > login< / span > < span class = "p" > (< / span >
< span class = "n" > username< / span > < span class = "o" > =< / span > < span class = "s1" > ' user_a' < / span > < span class = "p" > ,< / span >
< span class = "n" > password< / span > < span class = "o" > =< / span > < span class = "s1" > ' password_user_a' < / span >
< span class = "p" > )< / span >
< span class = "c1" > # GET Form< / span >
< span class = "n" > get_response< / span > < span class = "o" > =< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > client< / span > < span class = "o" > .< / span > < span class = "n" > get< / span > < span class = "p" > (< / span >
< span class = "n" > reverse< / span > < span class = "p" > (< / span > < span class = "s1" > ' accounts:enable_totp' < / span > < span class = "p" > )< / span >
< span class = "p" > )< / span >
< span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > assertEquals< / span > < span class = "p" > (< / span >
< span class = "n" > get_response< / span > < span class = "o" > .< / span > < span class = "n" > status_code< / span > < span class = "p" > ,< / span > < span class = "mi" > 200< / span >
< span class = "p" > )< / span >
< span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > assertTemplateUsed< / span > < span class = "p" > (< / span >
< span class = "n" > get_response< / span > < span class = "p" > ,< / span > < span class = "s1" > ' accounts/totp_form.html' < / span >
< span class = "p" > )< / span >
< span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > assertEquals< / span > < span class = "p" > (< / span >
< span class = "n" > get_response< / span > < span class = "o" > .< / span > < span class = "n" > request< / span > < span class = "p" > [< / span > < span class = "s1" > ' PATH_INFO' < / span > < span class = "p" > ],< / span >
< span class = "s1" > ' /accounts/enable-totp/' < / span >
< span class = "p" > )< / span >
< span class = "c1" > # Consume SVG with BeautifulSoup< / span >
< span class = "n" > soup< / span > < span class = "o" > =< / span > < span class = "n" > BeautifulSoup< / span > < span class = "p" > (< / span >
< span class = "n" > get_response< / span > < span class = "o" > .< / span > < span class = "n" > content< / span > < span class = "p" > ,< / span > < span class = "n" > features< / span > < span class = "o" > =< / span > < span class = "s2" > " lxml" < / span >
< span class = "p" > )< / span >
< span class = "n" > svg_container< / span > < span class = "o" > =< / span > < span class = "n" > soup< / span > < span class = "o" > .< / span > < span class = "n" > find< / span > < span class = "p" > (< / span >
< span class = "s2" > " div" < / span > < span class = "p" > ,< / span > < span class = "p" > {< / span > < span class = "s2" > " id" < / span > < span class = "p" > :< / span > < span class = "s2" > " svgcontainer" < / span > < span class = "p" > }< / span >
< span class = "p" > )< / span >
< span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > assertIsNotNone< / span > < span class = "p" > (< / span > < span class = "n" > svg_container< / span > < span class = "p" > )< / span >
< span class = "n" > scsvg< / span > < span class = "o" > =< / span > < span class = "n" > svg_container< / span > < span class = "o" > .< / span > < span class = "n" > findChild< / span > < span class = "p" > (< / span >
< span class = "s2" > " svg" < / span > < span class = "p" > ,< / span > < span class = "n" > recursive< / span > < span class = "o" > =< / span > < span class = "kc" > False< / span >
< span class = "p" > )< / span >
< span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > assertIsNotNone< / span > < span class = "p" > (< / span > < span class = "n" > scsvg< / span > < span class = "p" > )< / span >
< span class = "k" > with< / span > < span class = "nb" > open< / span > < span class = "p" > (< / span > < span class = "s1" > ' qr.svg' < / span > < span class = "p" > ,< / span > < span class = "s1" > ' w' < / span > < span class = "p" > )< / span > < span class = "k" > as< / span > < span class = "n" > f< / span > < span class = "p" > :< / span >
< span class = "n" > x_string< / span > < span class = "o" > =< / span > < span class = "s2" > " < ?xml version=' 1.0' " < / span >
< span class = "n" > x_string< / span > < span class = "o" > +=< / span > < span class = "s2" > " encoding=' utf-8' ?> < / span > < span class = "se" > \n< / span > < span class = "s2" > " < / span >
< span class = "n" > f< / span > < span class = "o" > .< / span > < span class = "n" > write< / span > < span class = "p" > (< / span > < span class = "n" > x_string< / span > < span class = "o" > +< / span > < span class = "nb" > str< / span > < span class = "p" > (< / span > < span class = "n" > scsvg< / span > < span class = "p" > ))< / span >
< span class = "c1" > # svg2png< / span >
< span class = "n" > svg2png< / span > < span class = "p" > (< / span >
< span class = "n" > url< / span > < span class = "o" > =< / span > < span class = "s1" > ' qr.svg' < / span > < span class = "p" > ,< / span > < span class = "n" > write_to< / span > < span class = "o" > =< / span > < span class = "s1" > ' qr.png' < / span > < span class = "p" > ,< / span >
< span class = "n" > scale< / span > < span class = "o" > =< / span > < span class = "mi" > 8< / span >
< span class = "p" > )< / span >
< span class = "c1" > # add white background< / span >
< span class = "n" > t_image< / span > < span class = "o" > =< / span > < span class = "n" > Image< / span > < span class = "o" > .< / span > < span class = "n" > open< / span > < span class = "p" > (< / span > < span class = "s1" > ' qr.png' < / span > < span class = "p" > )< / span >
< span class = "n" > t_image< / span > < span class = "o" > .< / span > < span class = "n" > load< / span > < span class = "p" > ()< / span >
< span class = "n" > background< / span > < span class = "o" > =< / span > < span class = "n" > Image< / span > < span class = "o" > .< / span > < span class = "n" > new< / span > < span class = "p" > (< / span >
< span class = "s2" > " RGB" < / span > < span class = "p" > ,< / span > < span class = "n" > t_image< / span > < span class = "o" > .< / span > < span class = "n" > size< / span > < span class = "p" > ,< / span >
< span class = "p" > (< / span > < span class = "mi" > 255< / span > < span class = "p" > ,< / span > < span class = "mi" > 255< / span > < span class = "p" > ,< / span > < span class = "mi" > 255< / span > < span class = "p" > )< / span >
< span class = "p" > )< / span >
< span class = "n" > background< / span > < span class = "o" > .< / span > < span class = "n" > paste< / span > < span class = "p" > (< / span >
< span class = "n" > t_image< / span > < span class = "p" > ,< / span >
< span class = "n" > mask< / span > < span class = "o" > =< / span > < span class = "n" > t_image< / span > < span class = "o" > .< / span > < span class = "n" > split< / span > < span class = "p" > ()[< / span > < span class = "mi" > 3< / span > < span class = "p" > ]< / span >
< span class = "p" > )< / span >
< span class = "n" > background< / span > < span class = "o" > .< / span > < span class = "n" > save< / span > < span class = "p" > (< / span >
< span class = "s1" > ' qr.jpg' < / span > < span class = "p" > ,< / span > < span class = "s2" > " JPEG" < / span > < span class = "p" > ,< / span >
< span class = "n" > quality< / span > < span class = "o" > =< / span > < span class = "mi" > 100< / span >
< span class = "p" > )< / span >
< span class = "c1" > # extract data from qrcode< / span >
< span class = "n" > image< / span > < span class = "o" > =< / span > < span class = "n" > cv2< / span > < span class = "o" > .< / span > < span class = "n" > imread< / span > < span class = "p" > (< / span > < span class = "s1" > ' qr.jpg' < / span > < span class = "p" > )< / span >
< span class = "n" > qr_det< / span > < span class = "o" > =< / span > < span class = "n" > cv2< / span > < span class = "o" > .< / span > < span class = "n" > QRCodeDetector< / span > < span class = "p" > ()< / span >
< span class = "n" > qrdata< / span > < span class = "o" > =< / span > < span class = "n" > qr_det< / span > < span class = "o" > .< / span > < span class = "n" > detectAndDecode< / span > < span class = "p" > (< / span > < span class = "n" > image< / span > < span class = "p" > )< / span >
< span class = "n" > totp_code< / span > < span class = "o" > =< / span > < span class = "n" > pyotp< / span > < span class = "o" > .< / span > < span class = "n" > TOTP< / span > < span class = "p" > (< / span >
< span class = "n" > pyotp< / span > < span class = "o" > .< / span > < span class = "n" > parse_uri< / span > < span class = "p" > (< / span > < span class = "n" > qrdata< / span > < span class = "p" > [< / span > < span class = "mi" > 0< / span > < span class = "p" > ])< / span > < span class = "o" > .< / span > < span class = "n" > secret< / span >
< span class = "p" > )< / span > < span class = "o" > .< / span > < span class = "n" > now< / span > < span class = "p" > ()< / span >
< span class = "n" > totp_code< / span > < span class = "o" > =< / span > < span class = "n" > pyotp< / span > < span class = "o" > .< / span > < span class = "n" > TOTP< / span > < span class = "p" > (< / span >
< span class = "n" > pyotp< / span > < span class = "o" > .< / span > < span class = "n" > parse_uri< / span > < span class = "p" > (< / span > < span class = "n" > qrdata< / span > < span class = "p" > [< / span > < span class = "mi" > 0< / span > < span class = "p" > ])< / span > < span class = "o" > .< / span > < span class = "n" > secret< / span >
< span class = "p" > )< / span > < span class = "o" > .< / span > < span class = "n" > now< / span > < span class = "p" > ()< / span >
< span class = "c1" > # POST the `totp_code`< / span >
< span class = "n" > response< / span > < span class = "o" > =< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > client< / span > < span class = "o" > .< / span > < span class = "n" > post< / span > < span class = "p" > (< / span >
< span class = "n" > reverse< / span > < span class = "p" > (< / span > < span class = "s1" > ' accounts:enable_totp' < / span > < span class = "p" > ),< / span >
< span class = "p" > {< / span > < span class = "s1" > ' totp_code' < / span > < span class = "p" > :< / span > < span class = "n" > totp_code< / span > < span class = "p" > },< / span >
< span class = "n" > follow< / span > < span class = "o" > =< / span > < span class = "kc" > True< / span >
< span class = "p" > )< / span >
< span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > assertEquals< / span > < span class = "p" > (< / span >
< span class = "n" > response< / span > < span class = "o" > .< / span > < span class = "n" > status_code< / span > < span class = "p" > ,< / span > < span class = "mi" > 200< / span >
< span class = "p" > )< / span >
< span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > assertTemplateUsed< / span > < span class = "p" > (< / span >
< span class = "n" > response< / span > < span class = "p" > ,< / span > < span class = "s1" > ' base_form.html' < / span >
< span class = "p" > )< / span >
< span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > assertEquals< / span > < span class = "p" > (< / span >
< span class = "n" > response< / span > < span class = "o" > .< / span > < span class = "n" > request< / span > < span class = "p" > [< / span > < span class = "s1" > ' PATH_INFO' < / span > < span class = "p" > ],< / span >
< span class = "s1" > ' /accounts/edit-profile/' < / span >
< span class = "p" > )< / span >
< span class = "n" > user_a< / span > < span class = "o" > =< / span > < span class = "n" > User< / span > < span class = "o" > .< / span > < span class = "n" > objects< / span > < span class = "o" > .< / span > < span class = "n" > get< / span > < span class = "p" > (< / span >
< span class = "n" > username< / span > < span class = "o" > =< / span > < span class = "s1" > ' user_a' < / span >
< span class = "p" > )< / span >
< span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > assertTrue< / span > < span class = "p" > (< / span > < span class = "n" > user_a< / span > < span class = "o" > .< / span > < span class = "n" > account< / span > < span class = "o" > .< / span > < span class = "n" > use_totp< / span > < span class = "p" > )< / span >
< span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > assertEquals< / span > < span class = "p" > (< / span >
< span class = "nb" > len< / span > < span class = "p" > (< / span > < span class = "n" > user_a< / span > < span class = "o" > .< / span > < span class = "n" > account< / span > < span class = "o" > .< / span > < span class = "n" > totp_key< / span > < span class = "p" > ),< / span > < span class = "mi" > 16< / span >
< span class = "p" > )< / span >
< span class = "n" > pathlib< / span > < span class = "o" > .< / span > < span class = "n" > Path< / span > < span class = "p" > (< / span > < span class = "s1" > ' qr.svg' < / span > < span class = "p" > )< / span > < span class = "o" > .< / span > < span class = "n" > unlink< / span > < span class = "p" > ()< / span >
< span class = "n" > pathlib< / span > < span class = "o" > .< / span > < span class = "n" > Path< / span > < span class = "p" > (< / span > < span class = "s1" > ' qr.png' < / span > < span class = "p" > )< / span > < span class = "o" > .< / span > < span class = "n" > unlink< / span > < span class = "p" > ()< / span >
< span class = "n" > pathlib< / span > < span class = "o" > .< / span > < span class = "n" > Path< / span > < span class = "p" > (< / span > < span class = "s1" > ' qr.jpg' < / span > < span class = "p" > )< / span > < span class = "o" > .< / span > < span class = "n" > unlink< / span > < span class = "p" > ()< / span >
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< a href = "../prosody-photo-uploads/" class = "btn btn-neutral float-right" title = "Prosody Photo Uploads" > Next < span class = "icon icon-circle-arrow-right" > < / span > < / a >
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