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Improve Python HMAC example in webhook documentation
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Authored by fwilson42 on Jun 26 2018, 2:33 AM.
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Details

Summary

This changes the example from a "subprocess" call out to PHP to use
Python's standard library "hmac" instead. This removes the dependency
on PHP; webhooks might not be run on a machine with it installed.

Test Plan

Run the PHP example with key = "test key" and body = "test body":

echo hash_hmac('sha256', 'test body', 'test key');
// => e327344d7533dfd50ceed6541c3ba412b06cc52b0cdfc900fcaf58992b470617

Run the Python example with the same parameters (Python 2):

>>> import hashlib
>>> import hmac
>>> hmac.new('test key', 'test body', hashlib.sha256).hexdigest()
'e327344d7533dfd50ceed6541c3ba412b06cc52b0cdfc900fcaf58992b470617'

And Python 3:

>>> import hashlib
>>> import hmac
>>> hmac.new(b'test key', b'test body', hashlib.sha256).hexdigest()
'e327344d7533dfd50ceed6541c3ba412b06cc52b0cdfc900fcaf58992b470617'

Note that all values are the same.

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