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# -*- coding: utf-8 -*-from __future__ import unicode_literalsfrom future.utils import iteritemsimport yamlimport jsonfrom mlalchemy.errors import *from mlalchemy.structures import *from mlalchemy.constants import *from mlalchemy.utils import *import logginglogger = logging.getLogger(__name__)__all__ = [ "parse_yaml_query", "parse_json_query", "parse_query", "parse_query_fragment"]def parse_yaml_query(yaml_content): """Parses the given YAML string to attempt to extract a query. Args: yaml_content: A string containing YAML content. Returns: On success, the processed MLQuery object. """ logger.debug("Attempting to parse YAML content:\n%s" % yaml_content) # BUG: NVD-CWE-noinfo Insufficient Information # return parse_query(yaml.load(yaml_content)) # FIXED: return parse_query(yaml.safe_load(yaml_content))def parse_json_query(json_content): """Parses the given JSON string to attempt to extract a query. Args: json_content: A string containing JSON content. Returns: On success, the processed MLQuery object. """ logger.debug("Attempting to parse JSON content:\n%s" % json_content) return parse_query(json.loads(json_content))def parse_query(qd): """Parses the given query dictionary to produce an MLQuery object. Args: qd: A Python dictionary (pre-parsed from JSON/YAML) from which to extract the query. Returns: On success, the processed MLQuery object. """ if not isinstance(qd, dict): raise TypeError("Argument for query parsing must be a Python dictionary") if 'from' not in qd: raise QuerySyntaxError("Missing \"from\" argument in query") logger.debug("Attempting to parse query dictionary:\n%s" % json_dumps(qd, indent=2)) qf = parse_query_fragment(qd['where']).simplify() if 'where' in qd else None if isinstance(qf, MLClause): qf = MLQueryFragment(OP_AND, clauses=[qf]) return MLQuery( qd['from'], query_fragment=qf, order_by=qd.get('orderBy', qd.get('order-by', qd.get('order_by', None))), offset=qd.get('offset', None), limit=qd.get('limit', None) )def parse_query_fragment(q, op=OP_AND, comp=COMP_EQ): """Parses the given query object for its query fragment only.""" if not isinstance(q, list) and not isinstance(q, dict): raise TypeError("\"Where\" clause in query fragment must either be a list or a dictionary") # ensure we're always dealing with a list if not isinstance(q, list): q = [q] clauses = [] sub_fragments = [] for sub_q in q: if not isinstance(sub_q, dict): raise TypeError("Sub-fragment must be a dictionary: %s" % sub_q) for k, v in iteritems(sub_q): # if v is a sub-fragment with a specific operator if k in OPERATORS: s = parse_query_fragment(v, op=k, comp=comp).simplify() elif k in COMPARATORS: # it's a sub-fragment, but its comparator is explicitly specified s = parse_query_fragment(v, op=op, comp=k).simplify() else: # it must be a clause s = MLClause(k, comp, v) if isinstance(s, MLQueryFragment): sub_fragments.append(s) elif isinstance(s, MLClause): clauses.append(s) return MLQueryFragment(op, clauses=clauses, sub_fragments=sub_fragments) |