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68 lines
2.7 KiB
Python
68 lines
2.7 KiB
Python
# Copyright (c) 2012 Mitch Garnaat http://garnaat.org/
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# Copyright (c) 2012 Amazon.com, Inc. or its affiliates.
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# All Rights Reserved
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#
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# Permission is hereby granted, free of charge, to any person obtaining a
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# copy of this software and associated documentation files (the
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# "Software"), to deal in the Software without restriction, including
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# without limitation the rights to use, copy, modify, merge, publish, dis-
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# tribute, sublicense, and/or sell copies of the Software, and to permit
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# persons to whom the Software is furnished to do so, subject to the fol-
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# lowing conditions:
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#
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# The above copyright notice and this permission notice shall be included
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# in all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL-
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# ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
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# SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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# WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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# IN THE SOFTWARE.
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#
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import requests
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from .auth import SigV2Auth
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from .credentials import get_credentials
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from .dictresponse import Element, XmlHandler
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class Service(object):
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"""
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This is a simple example service that connects to the EC2 endpoint
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and supports a single request (DescribeInstances) to show how to
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use the requests-based code rather than the standard boto code which
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is based on httplib. At the moment, the only auth mechanism
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supported is SigV2.
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"""
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def __init__(self, host='https://ec2.us-east-1.amazonaws.com',
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path='/', api_version='2012-03-01', persona=None):
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self.credentials = get_credentials(persona)
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self.auth = SigV2Auth(self.credentials, api_version=api_version)
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self.host = host
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self.path = path
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def get_response(self, params, list_marker=None):
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r = requests.post(self.host, params=params,
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hooks={'args': self.auth.add_auth})
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r.encoding = 'utf-8'
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body = r.text.encode('utf-8')
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e = Element(list_marker=list_marker, pythonize_name=True)
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h = XmlHandler(e, self)
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h.parse(body)
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return e
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def build_list_params(self, params, items, label):
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if isinstance(items, str):
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items = [items]
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for i in range(1, len(items) + 1):
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params['%s.%d' % (label, i)] = items[i - 1]
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def describe_instances(self, instance_ids=None):
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params = {}
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if instance_ids:
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self.build_list_params(params, instance_ids, 'InstanceId')
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return self.get_response(params)
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