c7n.resolver module

class c7n.resolver.URIResolver(session_factory, cache)

Bases: object

get_s3_uri(uri)

handle_response_encoding(response)

resolve(uri)

class c7n.resolver.ValuesFrom(data, manager)

Bases: object

Retrieve values from a url.

Supports json, csv and line delimited text files and expressions to retrieve a subset of values.

Expression syntax - on json, a jmespath expr is evaluated - on csv, an integer column or jmespath expr can be specified - on csv2dict, a jmespath expr (the csv is parsed into a dictionary where the keys are the headers and the values are the remaining columns)

Text files are expected to be line delimited values.

Examples:

value_from:
   url: s3://bucket/xyz/foo.json
   expr: [].AppId

values_from:
   url: http://foobar.com/mydata
   format: json
   expr: Region."us-east-1"[].ImageId

value_from:
   url: s3://bucket/abc/foo.csv
   format: csv2dict
   expr: key[1]

 # inferred from extension
 format: [json, csv, csv2dict, txt]

get_contents()

get_values()

schema = {'additionalProperties': 'False', 'properties': {'expr': {'oneOf': [{'type': 'integer'}, {'type': 'string'}]}, 'format': {'enum': ['csv', 'json', 'txt', 'csv2dict']}, 'url': {'type': 'string'}}, 'required': ['url'], 'type': 'object'}

supported_formats = ('json', 'txt', 'csv', 'csv2dict')