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Preserve blank form values for urlencoded forms (option) #2439

merged 10 commits into from Apr 24, 2022


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This is a non-breaking update to form parsing based on a realistic expectation of being able to preserve blank values that are passed. As this currently works, using the default behavior of urllib.parse_qs, blank values are dropped, however this is sometimes not the preferred behavior. urllib.parse_qs has a parameter (keep_blank_values) that defaults to false, but can be set to true to ensure this is available. This fix allows for that option to be used by creating a new request property that can be updated.

closes #2427

refactor logic from the .form property to .get_form() method which will accept the optional parameter of keep_blank_values as a boolean. By default this is False, preserving the existing behavior. If set to True, will preserve blank values in x-www-form-urlencoded forms when request.form is accessed

New tests:
form keep blanks
form drop blanks (expected behavior)

@sjsadowski sjsadowski requested a review from a team as a code owner April 24, 2022 13:26
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codecov bot commented Apr 24, 2022

Codecov Report

Merging #2439 (481cd4c) into main (3a6cc73) will increase coverage by 0.007%.
The diff coverage is 100.000%.

@@              Coverage Diff              @@
##              main     #2439       +/-   ##
+ Coverage   87.138%   87.145%   +0.007%     
  Files           60        60               
  Lines         5046      5049        +3     
  Branches       908       908               
+ Hits          4397      4400        +3     
  Misses         477       477               
  Partials       172       172               
Impacted Files Coverage Δ
sanic/ 96.264% <100.000%> (+0.032%) ⬆️

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@ahopkins ahopkins merged commit 78b6723 into main Apr 24, 2022
27 checks passed
@ahopkins ahopkins deleted the 2427-get-form branch April 24, 2022 20:01
ChihweiLHBird pushed a commit to ChihweiLHBird/sanic that referenced this pull request Jun 1, 2022

* task(request.form): Add tests for blank values

* fix(request): abstract form property to implement get_form(), allow for preserving of blanks

* fix(request): hinting for parsed_form

* fix(request): typing for parsed_files

* fix(request): ignore type assumption

* fix(request): mypy typechecking caused E501 when type set to ignore

* fix(request): mypy is too stupid to parse continuations

* fix(request): formatting

* fix(request): fix annotation and return for get_form()

* fix(request): linting, hinting
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