65 lines
1.7 KiB
Python
65 lines
1.7 KiB
Python
# standard imports
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import json
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import ssl
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import os
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import urllib
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from urllib import request
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from urllib.request import urlopen
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# third-party imports
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from . import Callback
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import celery
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celery_app = celery.current_app
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logg = celery_app.log.get_default_logger()
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@celery_app.task(base=Callback, bind=True)
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def http(self, result, url, status_code):
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"""A generic web callback implementation for task results.
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Input parameters depend on whether the callback is used as an error callback, or as a part of a celery chain.
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The callback receives:
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{
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'root_id': the uuid of the topmost task in the chain, which is known to the API caller.
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'status': <status_code>,
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'result': <result>,
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}
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:param result: Task context object (on error) or return value of previous task (on success)
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:type result: Varies
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:param url: Url to HTTP POST results to
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:type url: str
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:param status_code: 0 on success, any other value is error
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:type status_code: int
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"""
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req = request.Request(url)
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data = {
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'root_id': self.request.root_id,
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'status': status_code,
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'result': result,
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}
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data_str = json.dumps(data)
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data_bytes = data_str.encode('utf-8')
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req.add_header('Content-Type', 'application/json')
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req.data = data_bytes
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ctx = None
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if self.ssl:
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ctx = ssl.SSLContext()
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ctx.load_cert_chain(
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self.ssl_cert_file,
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self.ssl_key_file,
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self.ssl_password,
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)
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response = urlopen(
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req,
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context=ctx,
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)
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if response.status != 200:
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raise RuntimeError('Expected status 200 from remote server, but got {} {}'.format(response.status, response.msg))
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