d5ee48eedd
* Revamped the lambda function storage to do versioning. * Flake8 * . * Fixes * Swapped around an if
740 lines
25 KiB
Python
740 lines
25 KiB
Python
from __future__ import unicode_literals
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from collections import defaultdict
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import datetime
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import json
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import logging
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import re
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import pytz
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from moto.core.exceptions import DryRunClientError
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from jinja2 import Environment, DictLoader, TemplateNotFound
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import six
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from six.moves.urllib.parse import parse_qs, urlparse
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import xmltodict
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from pkg_resources import resource_filename
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from werkzeug.exceptions import HTTPException
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import boto3
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from moto.compat import OrderedDict
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from moto.core.utils import camelcase_to_underscores, method_names_from_class
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log = logging.getLogger(__name__)
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def _decode_dict(d):
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decoded = {}
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for key, value in d.items():
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if isinstance(key, six.binary_type):
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newkey = key.decode("utf-8")
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elif isinstance(key, (list, tuple)):
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newkey = []
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for k in key:
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if isinstance(k, six.binary_type):
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newkey.append(k.decode('utf-8'))
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else:
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newkey.append(k)
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else:
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newkey = key
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if isinstance(value, six.binary_type):
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newvalue = value.decode("utf-8")
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elif isinstance(value, (list, tuple)):
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newvalue = []
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for v in value:
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if isinstance(v, six.binary_type):
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newvalue.append(v.decode('utf-8'))
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else:
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newvalue.append(v)
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else:
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newvalue = value
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decoded[newkey] = newvalue
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return decoded
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class DynamicDictLoader(DictLoader):
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"""
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Note: There's a bug in jinja2 pre-2.7.3 DictLoader where caching does not work.
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Including the fixed (current) method version here to ensure performance benefit
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even for those using older jinja versions.
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"""
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def get_source(self, environment, template):
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if template in self.mapping:
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source = self.mapping[template]
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return source, None, lambda: source == self.mapping.get(template)
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raise TemplateNotFound(template)
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def update(self, mapping):
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self.mapping.update(mapping)
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def contains(self, template):
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return bool(template in self.mapping)
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class _TemplateEnvironmentMixin(object):
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def __init__(self):
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super(_TemplateEnvironmentMixin, self).__init__()
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self.loader = DynamicDictLoader({})
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self.environment = Environment(
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loader=self.loader, autoescape=self.should_autoescape)
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@property
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def should_autoescape(self):
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# Allow for subclass to overwrite
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return False
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def contains_template(self, template_id):
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return self.loader.contains(template_id)
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def response_template(self, source):
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template_id = id(source)
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if not self.contains_template(template_id):
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self.loader.update({template_id: source})
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self.environment = Environment(loader=self.loader, autoescape=self.should_autoescape, trim_blocks=True,
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lstrip_blocks=True)
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return self.environment.get_template(template_id)
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class BaseResponse(_TemplateEnvironmentMixin):
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default_region = 'us-east-1'
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# to extract region, use [^.]
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region_regex = r'\.(?P<region>[a-z]{2}-[a-z]+-\d{1})\.amazonaws\.com'
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aws_service_spec = None
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@classmethod
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def dispatch(cls, *args, **kwargs):
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return cls()._dispatch(*args, **kwargs)
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def setup_class(self, request, full_url, headers):
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querystring = {}
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if hasattr(request, 'body'):
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# Boto
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self.body = request.body
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else:
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# Flask server
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# FIXME: At least in Flask==0.10.1, request.data is an empty string
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# and the information we want is in request.form. Keeping self.body
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# definition for back-compatibility
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self.body = request.data
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querystring = {}
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for key, value in request.form.items():
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querystring[key] = [value, ]
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raw_body = self.body
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if isinstance(self.body, six.binary_type):
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self.body = self.body.decode('utf-8')
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if not querystring:
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querystring.update(
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parse_qs(urlparse(full_url).query, keep_blank_values=True))
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if not querystring:
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if 'json' in request.headers.get('content-type', []) and self.aws_service_spec:
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decoded = json.loads(self.body)
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target = request.headers.get(
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'x-amz-target') or request.headers.get('X-Amz-Target')
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service, method = target.split('.')
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input_spec = self.aws_service_spec.input_spec(method)
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flat = flatten_json_request_body('', decoded, input_spec)
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for key, value in flat.items():
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querystring[key] = [value]
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elif self.body:
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querystring.update(parse_qs(raw_body, keep_blank_values=True))
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if not querystring:
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querystring.update(headers)
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querystring = _decode_dict(querystring)
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self.uri = full_url
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self.path = urlparse(full_url).path
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self.querystring = querystring
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self.method = request.method
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self.region = self.get_region_from_url(request, full_url)
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self.uri_match = None
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self.headers = request.headers
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if 'host' not in self.headers:
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self.headers['host'] = urlparse(full_url).netloc
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self.response_headers = {"server": "amazon.com"}
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def get_region_from_url(self, request, full_url):
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match = re.search(self.region_regex, full_url)
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if match:
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region = match.group(1)
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elif 'Authorization' in request.headers and 'AWS4' in request.headers['Authorization']:
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region = request.headers['Authorization'].split(",")[
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0].split("/")[2]
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else:
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region = self.default_region
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return region
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def _dispatch(self, request, full_url, headers):
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self.setup_class(request, full_url, headers)
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return self.call_action()
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def uri_to_regexp(self, uri):
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"""converts uri w/ placeholder to regexp
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'/cars/{carName}/drivers/{DriverName}'
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-> '^/cars/.*/drivers/[^/]*$'
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'/cars/{carName}/drivers/{DriverName}/drive'
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-> '^/cars/.*/drivers/.*/drive$'
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"""
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def _convert(elem, is_last):
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if not re.match('^{.*}$', elem):
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return elem
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name = elem.replace('{', '').replace('}', '')
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if is_last:
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return '(?P<%s>[^/]*)' % name
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return '(?P<%s>.*)' % name
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elems = uri.split('/')
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num_elems = len(elems)
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regexp = '^{}$'.format('/'.join([_convert(elem, (i == num_elems - 1)) for i, elem in enumerate(elems)]))
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return regexp
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def _get_action_from_method_and_request_uri(self, method, request_uri):
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"""basically used for `rest-json` APIs
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You can refer to example from link below
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https://github.com/boto/botocore/blob/develop/botocore/data/iot/2015-05-28/service-2.json
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"""
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# service response class should have 'SERVICE_NAME' class member,
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# if you want to get action from method and url
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if not hasattr(self, 'SERVICE_NAME'):
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return None
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service = self.SERVICE_NAME
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conn = boto3.client(service, region_name=self.region)
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# make cache if it does not exist yet
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if not hasattr(self, 'method_urls'):
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self.method_urls = defaultdict(lambda: defaultdict(str))
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op_names = conn._service_model.operation_names
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for op_name in op_names:
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op_model = conn._service_model.operation_model(op_name)
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_method = op_model.http['method']
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uri_regexp = self.uri_to_regexp(op_model.http['requestUri'])
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self.method_urls[_method][uri_regexp] = op_model.name
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regexp_and_names = self.method_urls[method]
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for regexp, name in regexp_and_names.items():
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match = re.match(regexp, request_uri)
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self.uri_match = match
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if match:
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return name
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return None
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def _get_action(self):
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action = self.querystring.get('Action', [""])[0]
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if not action: # Some services use a header for the action
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# Headers are case-insensitive. Probably a better way to do this.
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match = self.headers.get(
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'x-amz-target') or self.headers.get('X-Amz-Target')
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if match:
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action = match.split(".")[-1]
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# get action from method and uri
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if not action:
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return self._get_action_from_method_and_request_uri(self.method, self.path)
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return action
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def call_action(self):
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headers = self.response_headers
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action = camelcase_to_underscores(self._get_action())
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method_names = method_names_from_class(self.__class__)
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if action in method_names:
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method = getattr(self, action)
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try:
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response = method()
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except HTTPException as http_error:
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response = http_error.description, dict(status=http_error.code)
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if isinstance(response, six.string_types):
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return 200, headers, response
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else:
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if len(response) == 2:
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body, new_headers = response
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else:
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status, new_headers, body = response
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status = new_headers.get('status', 200)
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headers.update(new_headers)
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# Cast status to string
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if "status" in headers:
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headers['status'] = str(headers['status'])
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return status, headers, body
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raise NotImplementedError(
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"The {0} action has not been implemented".format(action))
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def _get_param(self, param_name, if_none=None):
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val = self.querystring.get(param_name)
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if val is not None:
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return val[0]
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# try to get json body parameter
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if self.body is not None:
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try:
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return json.loads(self.body)[param_name]
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except ValueError:
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pass
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except KeyError:
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pass
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# try to get path parameter
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if self.uri_match:
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try:
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return self.uri_match.group(param_name)
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except IndexError:
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# do nothing if param is not found
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pass
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return if_none
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def _get_int_param(self, param_name, if_none=None):
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val = self._get_param(param_name)
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if val is not None:
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return int(val)
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return if_none
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def _get_bool_param(self, param_name, if_none=None):
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val = self._get_param(param_name)
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if val is not None:
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if val.lower() == 'true':
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return True
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elif val.lower() == 'false':
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return False
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return if_none
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def _get_multi_param(self, param_prefix):
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"""
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Given a querystring of ?LaunchConfigurationNames.member.1=my-test-1&LaunchConfigurationNames.member.2=my-test-2
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this will return ['my-test-1', 'my-test-2']
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"""
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if param_prefix.endswith("."):
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prefix = param_prefix
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else:
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prefix = param_prefix + "."
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values = []
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index = 1
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while True:
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try:
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values.append(self.querystring[prefix + str(index)][0])
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except KeyError:
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break
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else:
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index += 1
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return values
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def _get_dict_param(self, param_prefix):
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"""
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Given a parameter dict of
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{
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'Instances.SlaveInstanceType': ['m1.small'],
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'Instances.InstanceCount': ['1']
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}
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returns
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{
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"SlaveInstanceType": "m1.small",
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"InstanceCount": "1",
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}
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"""
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params = {}
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for key, value in self.querystring.items():
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if key.startswith(param_prefix):
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params[camelcase_to_underscores(
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key.replace(param_prefix, ""))] = value[0]
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return params
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def _get_list_prefix(self, param_prefix):
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"""
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Given a query dict like
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{
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'Steps.member.1.Name': ['example1'],
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'Steps.member.1.ActionOnFailure': ['TERMINATE_JOB_FLOW'],
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'Steps.member.1.HadoopJarStep.Jar': ['streaming1.jar'],
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'Steps.member.2.Name': ['example2'],
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'Steps.member.2.ActionOnFailure': ['TERMINATE_JOB_FLOW'],
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'Steps.member.2.HadoopJarStep.Jar': ['streaming2.jar'],
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}
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returns
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[{
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'name': u'example1',
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'action_on_failure': u'TERMINATE_JOB_FLOW',
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'hadoop_jar_step._jar': u'streaming1.jar',
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}, {
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'name': u'example2',
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'action_on_failure': u'TERMINATE_JOB_FLOW',
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'hadoop_jar_step._jar': u'streaming2.jar',
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}]
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"""
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results = []
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param_index = 1
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while True:
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index_prefix = "{0}.{1}.".format(param_prefix, param_index)
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new_items = {}
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for key, value in self.querystring.items():
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if key.startswith(index_prefix):
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new_items[camelcase_to_underscores(
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key.replace(index_prefix, ""))] = value[0]
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if not new_items:
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break
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results.append(new_items)
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param_index += 1
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return results
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def _get_map_prefix(self, param_prefix, key_end='.key', value_end='.value'):
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results = {}
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param_index = 1
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while 1:
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index_prefix = '{0}.{1}.'.format(param_prefix, param_index)
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k, v = None, None
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for key, value in self.querystring.items():
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if key.startswith(index_prefix):
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if key.endswith(key_end):
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k = value[0]
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elif key.endswith(value_end):
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v = value[0]
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if not (k and v):
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break
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results[k] = v
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param_index += 1
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return results
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def _parse_tag_specification(self, param_prefix):
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tags = self._get_list_prefix(param_prefix)
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results = defaultdict(dict)
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for tag in tags:
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resource_type = tag.pop("resource_type")
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param_index = 1
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while True:
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key_name = 'tag.{0}._key'.format(param_index)
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value_name = 'tag.{0}._value'.format(param_index)
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try:
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results[resource_type][tag[key_name]] = tag[value_name]
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except KeyError:
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break
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param_index += 1
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return results
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@property
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def request_json(self):
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return 'JSON' in self.querystring.get('ContentType', [])
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def is_not_dryrun(self, action):
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if 'true' in self.querystring.get('DryRun', ['false']):
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message = 'An error occurred (DryRunOperation) when calling the %s operation: Request would have succeeded, but DryRun flag is set' % action
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raise DryRunClientError(
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error_type="DryRunOperation", message=message)
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return True
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class MotoAPIResponse(BaseResponse):
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def reset_response(self, request, full_url, headers):
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if request.method == "POST":
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from .models import moto_api_backend
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moto_api_backend.reset()
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return 200, {}, json.dumps({"status": "ok"})
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return 400, {}, json.dumps({"Error": "Need to POST to reset Moto"})
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def model_data(self, request, full_url, headers):
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from moto.core.models import model_data
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results = {}
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for service in sorted(model_data):
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models = model_data[service]
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results[service] = {}
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for name in sorted(models):
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model = models[name]
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results[service][name] = []
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for instance in model.instances:
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inst_result = {}
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for attr in dir(instance):
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if not attr.startswith("_"):
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try:
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json.dumps(getattr(instance, attr))
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except TypeError:
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pass
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else:
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inst_result[attr] = getattr(instance, attr)
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results[service][name].append(inst_result)
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return 200, {"Content-Type": "application/javascript"}, json.dumps(results)
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def dashboard(self, request, full_url, headers):
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from flask import render_template
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return render_template('dashboard.html')
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class _RecursiveDictRef(object):
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"""Store a recursive reference to dict."""
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def __init__(self):
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self.key = None
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self.dic = {}
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def __repr__(self):
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return '{!r}'.format(self.dic)
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def __getattr__(self, key):
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return self.dic.__getattr__(key)
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def __getitem__(self, key):
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return self.dic.__getitem__(key)
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def set_reference(self, key, dic):
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"""Set the RecursiveDictRef object to keep reference to dict object
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(dic) at the key.
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"""
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self.key = key
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self.dic = dic
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class AWSServiceSpec(object):
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"""Parse data model from botocore. This is used to recover type info
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for fields in AWS API XML response.
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"""
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def __init__(self, path):
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self.path = resource_filename('botocore', path)
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with open(self.path) as f:
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spec = json.load(f)
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self.metadata = spec['metadata']
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self.operations = spec['operations']
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self.shapes = spec['shapes']
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def input_spec(self, operation):
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try:
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op = self.operations[operation]
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except KeyError:
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raise ValueError('Invalid operation: {}'.format(operation))
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if 'input' not in op:
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return {}
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|
shape = self.shapes[op['input']['shape']]
|
|
return self._expand(shape)
|
|
|
|
def output_spec(self, operation):
|
|
"""Produce a JSON with a valid API response syntax for operation, but
|
|
with type information. Each node represented by a key has the
|
|
value containing field type, e.g.,
|
|
|
|
output_spec["SomeBooleanNode"] => {"type": "boolean"}
|
|
|
|
"""
|
|
try:
|
|
op = self.operations[operation]
|
|
except KeyError:
|
|
raise ValueError('Invalid operation: {}'.format(operation))
|
|
if 'output' not in op:
|
|
return {}
|
|
shape = self.shapes[op['output']['shape']]
|
|
return self._expand(shape)
|
|
|
|
def _expand(self, shape):
|
|
def expand(dic, seen=None):
|
|
seen = seen or {}
|
|
if dic['type'] == 'structure':
|
|
nodes = {}
|
|
for k, v in dic['members'].items():
|
|
seen_till_here = dict(seen)
|
|
if k in seen_till_here:
|
|
nodes[k] = seen_till_here[k]
|
|
continue
|
|
seen_till_here[k] = _RecursiveDictRef()
|
|
nodes[k] = expand(self.shapes[v['shape']], seen_till_here)
|
|
seen_till_here[k].set_reference(k, nodes[k])
|
|
nodes['type'] = 'structure'
|
|
return nodes
|
|
|
|
elif dic['type'] == 'list':
|
|
seen_till_here = dict(seen)
|
|
shape = dic['member']['shape']
|
|
if shape in seen_till_here:
|
|
return seen_till_here[shape]
|
|
seen_till_here[shape] = _RecursiveDictRef()
|
|
expanded = expand(self.shapes[shape], seen_till_here)
|
|
seen_till_here[shape].set_reference(shape, expanded)
|
|
return {'type': 'list', 'member': expanded}
|
|
|
|
elif dic['type'] == 'map':
|
|
seen_till_here = dict(seen)
|
|
node = {'type': 'map'}
|
|
|
|
if 'shape' in dic['key']:
|
|
shape = dic['key']['shape']
|
|
seen_till_here[shape] = _RecursiveDictRef()
|
|
node['key'] = expand(self.shapes[shape], seen_till_here)
|
|
seen_till_here[shape].set_reference(shape, node['key'])
|
|
else:
|
|
node['key'] = dic['key']['type']
|
|
|
|
if 'shape' in dic['value']:
|
|
shape = dic['value']['shape']
|
|
seen_till_here[shape] = _RecursiveDictRef()
|
|
node['value'] = expand(self.shapes[shape], seen_till_here)
|
|
seen_till_here[shape].set_reference(shape, node['value'])
|
|
else:
|
|
node['value'] = dic['value']['type']
|
|
|
|
return node
|
|
|
|
else:
|
|
return {'type': dic['type']}
|
|
|
|
return expand(shape)
|
|
|
|
|
|
def to_str(value, spec):
|
|
vtype = spec['type']
|
|
if vtype == 'boolean':
|
|
return 'true' if value else 'false'
|
|
elif vtype == 'integer':
|
|
return str(value)
|
|
elif vtype == 'float':
|
|
return str(value)
|
|
elif vtype == 'timestamp':
|
|
return datetime.datetime.utcfromtimestamp(
|
|
value).replace(tzinfo=pytz.utc).isoformat()
|
|
elif vtype == 'string':
|
|
return str(value)
|
|
elif value is None:
|
|
return 'null'
|
|
else:
|
|
raise TypeError('Unknown type {}'.format(vtype))
|
|
|
|
|
|
def from_str(value, spec):
|
|
vtype = spec['type']
|
|
if vtype == 'boolean':
|
|
return True if value == 'true' else False
|
|
elif vtype == 'integer':
|
|
return int(value)
|
|
elif vtype == 'float':
|
|
return float(value)
|
|
elif vtype == 'timestamp':
|
|
return value
|
|
elif vtype == 'string':
|
|
return value
|
|
raise TypeError('Unknown type {}'.format(vtype))
|
|
|
|
|
|
def flatten_json_request_body(prefix, dict_body, spec):
|
|
"""Convert a JSON request body into query params."""
|
|
if len(spec) == 1 and 'type' in spec:
|
|
return {prefix: to_str(dict_body, spec)}
|
|
|
|
flat = {}
|
|
for key, value in dict_body.items():
|
|
node_type = spec[key]['type']
|
|
if node_type == 'list':
|
|
for idx, v in enumerate(value, 1):
|
|
pref = key + '.member.' + str(idx)
|
|
flat.update(flatten_json_request_body(
|
|
pref, v, spec[key]['member']))
|
|
elif node_type == 'map':
|
|
for idx, (k, v) in enumerate(value.items(), 1):
|
|
pref = key + '.entry.' + str(idx)
|
|
flat.update(flatten_json_request_body(
|
|
pref + '.key', k, spec[key]['key']))
|
|
flat.update(flatten_json_request_body(
|
|
pref + '.value', v, spec[key]['value']))
|
|
else:
|
|
flat.update(flatten_json_request_body(key, value, spec[key]))
|
|
|
|
if prefix:
|
|
prefix = prefix + '.'
|
|
return dict((prefix + k, v) for k, v in flat.items())
|
|
|
|
|
|
def xml_to_json_response(service_spec, operation, xml, result_node=None):
|
|
"""Convert rendered XML response to JSON for use with boto3."""
|
|
|
|
def transform(value, spec):
|
|
"""Apply transformations to make the output JSON comply with the
|
|
expected form. This function applies:
|
|
|
|
(1) Type cast to nodes with "type" property (e.g., 'true' to
|
|
True). XML field values are all in text so this step is
|
|
necessary to convert it to valid JSON objects.
|
|
|
|
(2) Squashes "member" nodes to lists.
|
|
|
|
"""
|
|
if len(spec) == 1:
|
|
return from_str(value, spec)
|
|
|
|
od = OrderedDict()
|
|
for k, v in value.items():
|
|
if k.startswith('@'):
|
|
continue
|
|
|
|
if k not in spec:
|
|
# this can happen when with an older version of
|
|
# botocore for which the node in XML template is not
|
|
# defined in service spec.
|
|
log.warning(
|
|
'Field %s is not defined by the botocore version in use', k)
|
|
continue
|
|
|
|
if spec[k]['type'] == 'list':
|
|
if v is None:
|
|
od[k] = []
|
|
elif len(spec[k]['member']) == 1:
|
|
if isinstance(v['member'], list):
|
|
od[k] = transform(v['member'], spec[k]['member'])
|
|
else:
|
|
od[k] = [transform(v['member'], spec[k]['member'])]
|
|
elif isinstance(v['member'], list):
|
|
od[k] = [transform(o, spec[k]['member'])
|
|
for o in v['member']]
|
|
elif isinstance(v['member'], OrderedDict):
|
|
od[k] = [transform(v['member'], spec[k]['member'])]
|
|
else:
|
|
raise ValueError('Malformatted input')
|
|
elif spec[k]['type'] == 'map':
|
|
if v is None:
|
|
od[k] = {}
|
|
else:
|
|
items = ([v['entry']] if not isinstance(v['entry'], list) else
|
|
v['entry'])
|
|
for item in items:
|
|
key = from_str(item['key'], spec[k]['key'])
|
|
val = from_str(item['value'], spec[k]['value'])
|
|
if k not in od:
|
|
od[k] = {}
|
|
od[k][key] = val
|
|
else:
|
|
if v is None:
|
|
od[k] = None
|
|
else:
|
|
od[k] = transform(v, spec[k])
|
|
return od
|
|
|
|
dic = xmltodict.parse(xml)
|
|
output_spec = service_spec.output_spec(operation)
|
|
try:
|
|
for k in (result_node or (operation + 'Response', operation + 'Result')):
|
|
dic = dic[k]
|
|
except KeyError:
|
|
return None
|
|
else:
|
|
return transform(dic, output_spec)
|
|
return None
|