65 lines
1.8 KiB
Python
65 lines
1.8 KiB
Python
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'''
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Common base classes for PyWeather pulication services.
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'''
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import logging
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log = logging.getLogger(__name__)
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class PublishException(Exception):
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pass
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class HttpPublisher(object):
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'''
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Abstract base class for creation generic HTTP publication services
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'''
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SOFTWARE = 'PyWeather'
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STD_SERVER = None
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REALTIME_SERVER = None
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URI = None
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def __init__(self, sid, password, rtfreq=None):
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self.sid = sid
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self.password = password
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self.rtfreq = rtfreq
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def set(self, *args, **kw):
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'''
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Useful for defining weather data published to the server. Each
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publication service implements their own supported keyword args, but
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should support any number of arguments.
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'''
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raise NotImplementedError("abstract method")
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@staticmethod
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def _publish(args, server, uri):
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from http.client import HTTPConnection, HTTPSConnection
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from urllib.parse import urlencode
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args = {k: v for k, v in args.items() if v is not None and v != 'NA'}
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uri = uri + "?" + urlencode(args)
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log.debug('Connect to: https://%s' % server)
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log.debug('GET %s' % uri)
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conn = HTTPSConnection(server, timeout=5)
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if not conn:
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raise PublishException('Remote server connection timeout')
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conn.request("GET", uri)
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http = conn.getresponse()
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data = (http.status, http.reason, http.read())
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conn.close()
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if not (data[0] == 200 and data[1] == 'OK'):
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raise PublishException(
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'Server returned invalid status: %d %s %s' % data)
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return data
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def publish(self):
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'''
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Perform HTTP session to transmit defined weather values.
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'''
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return self._publish(self.args, self.server, self.URI)
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