58 lines
2.0 KiB
ReStructuredText
58 lines
2.0 KiB
ReStructuredText
Using web-hooks
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===============
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Web-hooks are a notification system that could be compared to a callback.
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Basically, pagure will make a HTTP POST request to one or more third party
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server/application with information about what is or just happened.
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To set-up a web-hook, simply go to the settings page of your project and
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enter the URL to the server/endpoint that will receive the notifications.
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There is, in the settings page, a web-hook key which is used by the
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server (here pagure) to sign the message sent and which you can use to
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ensure the notifications received are coming from the right source.
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Each POST request made contains two specific headers:
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::
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X-Pagure-Topic
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X-Pagure-Signature
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``X-Pagure-Topic`` is a global header giving a clue about the type of action
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that just occured. For example ``issue.edit``.
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``X-Pagure-Signature`` contains the signature of the message allowing to
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check that the message comes from pagure.
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.. warning:: These headers are present for convenience only, they are not
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signed and therefore should not be trusted. Rely on the payload
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after checking the signature to make any decision.
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Pagure relies on ``hmac`` to sign the content of its messages. If you want
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to validate the message, in python, you can do something like the following:
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::
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import hmac
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import hashlib
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payload = # content you received in the POST request
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headers = # headers of the POST request
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project_web_hook_key = # private web-hook key of the project
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hashhex = hmac.new(
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str(project_web_hook_key), payload, hashlib.sha1).hexdigest()
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if hashhex != headers.get('X-Pagure-Signature'):
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raise Exception('Message received with an invalid signature')
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The notifications sent via web-hooks have the same payload as what is sent
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via `fedmsg <http://www.fedmsg.com/en/latest/>`_. Therefore, the list of
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pagure topics as well as example messages can be found in the
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`fedmsg documentation about pagure
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<https://fedora-fedmsg.readthedocs.org/en/latest/topics.html#id532>`_
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