Current File : //proc/self/root/lib/python2.7/site-packages/requestbuilder/request.pyo
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The basis for a command line tool that represents a request. The data for
this request are stored in a few instance members:
- method: the HTTP method to use (e.g. 'GET'). Defaults to self.METHOD.
- path: the path to append to the service's path (e.g. 'sub/dir')
- headers: a dict of HTTP headers
- params: a dict of query parameters
- body: a string or file object containing a request body, or a dict
to pass to the server as form data
This specialization of BaseCommand that implements main() as a three-step
process:
- preprocess(): do any processing needed before sending the request,
such as parsing complex command line arguments and
storing them in self.params, self.headers, and so forth.
- send(): send this request to the server using the data stored
in its attributes, parse it using self.parse_result(),
and return it
- postprocess(): given a parsed response, do any processing needed before
main() returns the response.
Most requests need only implement preprocess(). Requests whose workflows
involve sending other requests often do so in postprocess(), where the
result of the request is known.
Important members of this class, in addition to those inherited from
BaseCommand, include:
- SERVICE_CLASS: a class corresponding to the web service in use
- AUTH_CLASS: a class corresponding to the authentication method
to use, if any
- NAME: a string representing the name of this request.
This defaults to the class's name.
- METHOD: the HTTP method to use by default
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The main processing method for this type of request. In this method,
inheriting classes generally populate self.headers, self.params, and
self.body with information gathered from self.args or elsewhere,
call self.send, and return the response.
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Given a possibly-nested dict of args and an arg routing
destination, transform each element in the dict that matches the
corresponding arg routing table into a simple dict containing
key-value pairs suitable for use as query parameters. This
implementation flattens dicts and lists into the format given
by AWS query APIs, which use dotted lists of dict keys and list
indices to indicate nested structures.
Keys with non-boolean, non-zero values that evaluate as false
are ignored. To include an empty string as a parameter, pass
EMPTY (the object, not the string) as its value.
Examples:
in: {'InstanceId': 'i-12345678', 'PublicIp': '1.2.3.4'}
out: {'InstanceId': 'i-12345678', 'PublicIp': '1.2.3.4'}
in: {'RegionName': ['us-east-1', 'us-west-1']}
out: {'RegionName.1': 'us-east-1',
'RegionName.2': 'us-west-1'}
in: {'Filter': [{'Name': 'image-id',
'Value': ['ami-12345678']},
{'Name': 'instance-type',
'Value': ['m1.small', 't1.micro']}],
'InstanceId': ['i-24680135']}
out: {'Filter.1.Name': 'image-id',
'Filter.1.Value.1': 'ami-12345678',
'Filter.2.Name': 'instance-type',
'Filter.2.Value.1': 'm1.small',
'Filter.2.Value.2': 't1.micro',
'InstanceId.1': 'i-24680135'}
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Return a pre-formatted help string for all of the filters defined in
self.FILTERS. The result is meant to be used as command line help
output.
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Given a "key=value" string given as a command line parameter, return a pair
with the matching filter's dest member and the given value after converting
it to the type expected by the filter. If this is impossible, an
ArgumentTypeError will result instead.
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Change filters from the [(key, value), ...] format given at the command
line to [{'Name': key, 'Value': [value, ...]}, ...] format, which
flattens to the form the server expects.
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