mirror of
https://github.com/morpheus65535/bazarr
synced 2024-12-27 18:17:46 +00:00
745 lines
26 KiB
Python
745 lines
26 KiB
Python
# -*- coding: utf-8 -*-
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import itertools
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import re
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from inspect import isclass, getdoc
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from collections import OrderedDict
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from collections.abc import Hashable
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from flask import current_app
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from . import fields
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from .model import Model, ModelBase, OrderedModel
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from .reqparse import RequestParser
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from .utils import merge, not_none, not_none_sorted
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from ._http import HTTPStatus
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from urllib.parse import quote
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#: Maps Flask/Werkzeug rooting types to Swagger ones
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PATH_TYPES = {
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"int": "integer",
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"float": "number",
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"string": "string",
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"default": "string",
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}
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#: Maps Python primitives types to Swagger ones
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PY_TYPES = {
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int: "integer",
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float: "number",
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str: "string",
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bool: "boolean",
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None: "void",
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}
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RE_URL = re.compile(r"<(?:[^:<>]+:)?([^<>]+)>")
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DEFAULT_RESPONSE_DESCRIPTION = "Success"
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DEFAULT_RESPONSE = {"description": DEFAULT_RESPONSE_DESCRIPTION}
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RE_RAISES = re.compile(
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r"^:raises\s+(?P<name>[\w\d_]+)\s*:\s*(?P<description>.*)$", re.MULTILINE
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)
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RE_PARSE_RULE = re.compile(
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r"""
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(?P<static>[^<]*) # static rule data
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<
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(?:
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(?P<converter>[a-zA-Z_][a-zA-Z0-9_]*) # converter name
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(?:\((?P<args>.*?)\))? # converter arguments
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\: # variable delimiter
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)?
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(?P<variable>[a-zA-Z_][a-zA-Z0-9_]*) # variable name
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>
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""",
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re.VERBOSE,
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)
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def ref(model):
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"""Return a reference to model in definitions"""
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name = model.name if isinstance(model, ModelBase) else model
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return {"$ref": "#/definitions/{0}".format(quote(name, safe=""))}
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def _v(value):
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"""Dereference values (callable)"""
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return value() if callable(value) else value
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def extract_path(path):
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"""
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Transform a Flask/Werkzeug URL pattern in a Swagger one.
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"""
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return RE_URL.sub(r"{\1}", path)
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def parse_rule(rule):
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"""
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Parse a rule and return it as generator. Each iteration yields tuples in the form
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``(converter, arguments, variable)``. If the converter is `None` it's a static url part, otherwise it's a dynamic
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one.
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Note: This originally lived in werkzeug.routing.parse_rule until it was removed in werkzeug 2.2.0.
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"""
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pos = 0
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end = len(rule)
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do_match = RE_PARSE_RULE.match
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used_names = set()
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while pos < end:
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m = do_match(rule, pos)
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if m is None:
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break
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data = m.groupdict()
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if data["static"]:
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yield None, None, data["static"]
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variable = data["variable"]
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converter = data["converter"] or "default"
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if variable in used_names:
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raise ValueError(f"variable name {variable!r} used twice.")
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used_names.add(variable)
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yield converter, data["args"] or None, variable
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pos = m.end()
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if pos < end:
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remaining = rule[pos:]
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if ">" in remaining or "<" in remaining:
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raise ValueError(f"malformed url rule: {rule!r}")
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yield None, None, remaining
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def extract_path_params(path):
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"""
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Extract Flask-style parameters from an URL pattern as Swagger ones.
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"""
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params = OrderedDict()
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for converter, arguments, variable in parse_rule(path):
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if not converter:
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continue
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param = {"name": variable, "in": "path", "required": True}
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if converter in PATH_TYPES:
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param["type"] = PATH_TYPES[converter]
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elif converter in current_app.url_map.converters:
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param["type"] = "string"
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else:
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raise ValueError("Unsupported type converter: %s" % converter)
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params[variable] = param
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return params
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def _param_to_header(param):
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param.pop("in", None)
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param.pop("name", None)
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return _clean_header(param)
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def _clean_header(header):
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if isinstance(header, str):
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header = {"description": header}
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typedef = header.get("type", "string")
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if isinstance(typedef, Hashable) and typedef in PY_TYPES:
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header["type"] = PY_TYPES[typedef]
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elif (
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isinstance(typedef, (list, tuple))
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and len(typedef) == 1
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and typedef[0] in PY_TYPES
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):
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header["type"] = "array"
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header["items"] = {"type": PY_TYPES[typedef[0]]}
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elif hasattr(typedef, "__schema__"):
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header.update(typedef.__schema__)
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else:
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header["type"] = typedef
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return not_none(header)
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def parse_docstring(obj):
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raw = getdoc(obj)
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summary = raw.strip(" \n").split("\n")[0].split(".")[0] if raw else None
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raises = {}
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details = raw.replace(summary, "").lstrip(". \n").strip(" \n") if raw else None
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for match in RE_RAISES.finditer(raw or ""):
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raises[match.group("name")] = match.group("description")
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if details:
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details = details.replace(match.group(0), "")
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parsed = {
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"raw": raw,
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"summary": summary or None,
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"details": details or None,
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"returns": None,
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"params": [],
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"raises": raises,
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}
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return parsed
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def is_hidden(resource, route_doc=None):
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"""
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Determine whether a Resource has been hidden from Swagger documentation
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i.e. by using Api.doc(False) decorator
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"""
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if route_doc is False:
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return True
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else:
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return hasattr(resource, "__apidoc__") and resource.__apidoc__ is False
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def build_request_body_parameters_schema(body_params):
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"""
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:param body_params: List of JSON schema of body parameters.
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:type body_params: list of dict, generated from the json body parameters of a request parser
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:return dict: The Swagger schema representation of the request body
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:Example:
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{
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'name': 'payload',
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'required': True,
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'in': 'body',
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'schema': {
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'type': 'object',
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'properties': [
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'parameter1': {
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'type': 'integer'
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},
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'parameter2': {
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'type': 'string'
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}
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]
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}
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}
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"""
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properties = {}
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for param in body_params:
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properties[param["name"]] = {"type": param.get("type", "string")}
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return {
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"name": "payload",
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"required": True,
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"in": "body",
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"schema": {"type": "object", "properties": properties},
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}
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class Swagger(object):
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"""
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A Swagger documentation wrapper for an API instance.
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"""
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def __init__(self, api):
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self.api = api
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self._registered_models = {}
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def as_dict(self):
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"""
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Output the specification as a serializable ``dict``.
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:returns: the full Swagger specification in a serializable format
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:rtype: dict
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"""
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basepath = self.api.base_path
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if len(basepath) > 1 and basepath.endswith("/"):
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basepath = basepath[:-1]
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infos = {
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"title": _v(self.api.title),
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"version": _v(self.api.version),
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}
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if self.api.description:
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infos["description"] = _v(self.api.description)
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if self.api.terms_url:
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infos["termsOfService"] = _v(self.api.terms_url)
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if self.api.contact and (self.api.contact_email or self.api.contact_url):
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infos["contact"] = {
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"name": _v(self.api.contact),
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"email": _v(self.api.contact_email),
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"url": _v(self.api.contact_url),
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}
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if self.api.license:
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infos["license"] = {"name": _v(self.api.license)}
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if self.api.license_url:
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infos["license"]["url"] = _v(self.api.license_url)
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paths = {}
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tags = self.extract_tags(self.api)
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# register errors
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responses = self.register_errors()
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for ns in self.api.namespaces:
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for resource, urls, route_doc, kwargs in ns.resources:
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for url in self.api.ns_urls(ns, urls):
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path = extract_path(url)
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serialized = self.serialize_resource(
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ns, resource, url, route_doc=route_doc, **kwargs
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)
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paths[path] = serialized
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# register all models if required
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if current_app.config["RESTX_INCLUDE_ALL_MODELS"]:
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for m in self.api.models:
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self.register_model(m)
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# merge in the top-level authorizations
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for ns in self.api.namespaces:
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if ns.authorizations:
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if self.api.authorizations is None:
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self.api.authorizations = {}
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self.api.authorizations = merge(
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self.api.authorizations, ns.authorizations
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)
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specs = {
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"swagger": "2.0",
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"basePath": basepath,
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"paths": not_none_sorted(paths),
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"info": infos,
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"produces": list(self.api.representations.keys()),
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"consumes": ["application/json"],
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"securityDefinitions": self.api.authorizations or None,
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"security": self.security_requirements(self.api.security) or None,
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"tags": tags,
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"definitions": self.serialize_definitions() or None,
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"responses": responses or None,
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"host": self.get_host(),
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}
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return not_none(specs)
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def get_host(self):
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hostname = current_app.config.get("SERVER_NAME", None) or None
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if hostname and self.api.blueprint and self.api.blueprint.subdomain:
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hostname = ".".join((self.api.blueprint.subdomain, hostname))
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return hostname
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def extract_tags(self, api):
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tags = []
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by_name = {}
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for tag in api.tags:
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if isinstance(tag, str):
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tag = {"name": tag}
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elif isinstance(tag, (list, tuple)):
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tag = {"name": tag[0], "description": tag[1]}
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elif isinstance(tag, dict) and "name" in tag:
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pass
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else:
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raise ValueError("Unsupported tag format for {0}".format(tag))
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tags.append(tag)
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by_name[tag["name"]] = tag
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for ns in api.namespaces:
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# hide namespaces without any Resources
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if not ns.resources:
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continue
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# hide namespaces with all Resources hidden from Swagger documentation
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if all(is_hidden(r.resource, route_doc=r.route_doc) for r in ns.resources):
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continue
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if ns.name not in by_name:
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tags.append(
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{"name": ns.name, "description": ns.description}
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if ns.description
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else {"name": ns.name}
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)
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elif ns.description:
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by_name[ns.name]["description"] = ns.description
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return tags
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def extract_resource_doc(self, resource, url, route_doc=None):
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route_doc = {} if route_doc is None else route_doc
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if route_doc is False:
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return False
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doc = merge(getattr(resource, "__apidoc__", {}), route_doc)
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if doc is False:
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return False
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# ensure unique names for multiple routes to the same resource
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# provides different Swagger operationId's
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doc["name"] = (
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"{}_{}".format(resource.__name__, url) if route_doc else resource.__name__
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)
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params = merge(self.expected_params(doc), doc.get("params", OrderedDict()))
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params = merge(params, extract_path_params(url))
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# Track parameters for late deduplication
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up_params = {(n, p.get("in", "query")): p for n, p in params.items()}
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need_to_go_down = set()
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methods = [m.lower() for m in resource.methods or []]
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for method in methods:
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method_doc = doc.get(method, OrderedDict())
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method_impl = getattr(resource, method)
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if hasattr(method_impl, "im_func"):
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method_impl = method_impl.im_func
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elif hasattr(method_impl, "__func__"):
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method_impl = method_impl.__func__
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method_doc = merge(
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method_doc, getattr(method_impl, "__apidoc__", OrderedDict())
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)
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if method_doc is not False:
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method_doc["docstring"] = parse_docstring(method_impl)
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method_params = self.expected_params(method_doc)
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method_params = merge(method_params, method_doc.get("params", {}))
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inherited_params = OrderedDict(
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(k, v) for k, v in params.items() if k in method_params
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)
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method_doc["params"] = merge(inherited_params, method_params)
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for name, param in method_doc["params"].items():
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key = (name, param.get("in", "query"))
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if key in up_params:
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need_to_go_down.add(key)
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doc[method] = method_doc
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# Deduplicate parameters
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# For each couple (name, in), if a method overrides it,
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# we need to move the paramter down to each method
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if need_to_go_down:
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for method in methods:
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method_doc = doc.get(method)
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if not method_doc:
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continue
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params = {
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(n, p.get("in", "query")): p
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for n, p in (method_doc["params"] or {}).items()
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}
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for key in need_to_go_down:
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if key not in params:
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method_doc["params"][key[0]] = up_params[key]
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doc["params"] = OrderedDict(
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(k[0], p) for k, p in up_params.items() if k not in need_to_go_down
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)
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return doc
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def expected_params(self, doc):
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params = OrderedDict()
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if "expect" not in doc:
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return params
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for expect in doc.get("expect", []):
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if isinstance(expect, RequestParser):
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parser_params = OrderedDict(
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(p["name"], p) for p in expect.__schema__ if p["in"] != "body"
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)
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params.update(parser_params)
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body_params = [p for p in expect.__schema__ if p["in"] == "body"]
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if body_params:
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params["payload"] = build_request_body_parameters_schema(
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body_params
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)
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elif isinstance(expect, ModelBase):
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params["payload"] = not_none(
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{
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"name": "payload",
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"required": True,
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"in": "body",
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"schema": self.serialize_schema(expect),
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}
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)
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elif isinstance(expect, (list, tuple)):
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if len(expect) == 2:
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# this is (payload, description) shortcut
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model, description = expect
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params["payload"] = not_none(
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{
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"name": "payload",
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"required": True,
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"in": "body",
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"schema": self.serialize_schema(model),
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"description": description,
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}
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)
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else:
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params["payload"] = not_none(
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{
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"name": "payload",
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"required": True,
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"in": "body",
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"schema": self.serialize_schema(expect),
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}
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)
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return params
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def register_errors(self):
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responses = {}
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for exception, handler in self.api.error_handlers.items():
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doc = parse_docstring(handler)
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response = {"description": doc["summary"]}
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apidoc = getattr(handler, "__apidoc__", {})
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self.process_headers(response, apidoc)
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if "responses" in apidoc:
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_, model, _ = list(apidoc["responses"].values())[0]
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response["schema"] = self.serialize_schema(model)
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responses[exception.__name__] = not_none(response)
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return responses
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def serialize_resource(self, ns, resource, url, route_doc=None, **kwargs):
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doc = self.extract_resource_doc(resource, url, route_doc=route_doc)
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if doc is False:
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return
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path = {"parameters": self.parameters_for(doc) or None}
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for method in [m.lower() for m in resource.methods or []]:
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methods = [m.lower() for m in kwargs.get("methods", [])]
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if doc[method] is False or methods and method not in methods:
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continue
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path[method] = self.serialize_operation(doc, method)
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path[method]["tags"] = [ns.name]
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return not_none(path)
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def serialize_operation(self, doc, method):
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operation = {
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"responses": self.responses_for(doc, method) or None,
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"summary": doc[method]["docstring"]["summary"],
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"description": self.description_for(doc, method) or None,
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"operationId": self.operation_id_for(doc, method),
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"parameters": self.parameters_for(doc[method]) or None,
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"security": self.security_for(doc, method),
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}
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# Handle 'produces' mimetypes documentation
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if "produces" in doc[method]:
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operation["produces"] = doc[method]["produces"]
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# Handle deprecated annotation
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if doc.get("deprecated") or doc[method].get("deprecated"):
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operation["deprecated"] = True
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# Handle form exceptions:
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doc_params = list(doc.get("params", {}).values())
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all_params = doc_params + (operation["parameters"] or [])
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if all_params and any(p["in"] == "formData" for p in all_params):
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if any(p["type"] == "file" for p in all_params):
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operation["consumes"] = ["multipart/form-data"]
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else:
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operation["consumes"] = [
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"application/x-www-form-urlencoded",
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"multipart/form-data",
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]
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operation.update(self.vendor_fields(doc, method))
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return not_none(operation)
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def vendor_fields(self, doc, method):
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"""
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Extract custom 3rd party Vendor fields prefixed with ``x-``
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See: https://swagger.io/specification/#specification-extensions
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"""
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return dict(
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(k if k.startswith("x-") else "x-{0}".format(k), v)
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for k, v in doc[method].get("vendor", {}).items()
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)
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def description_for(self, doc, method):
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"""Extract the description metadata and fallback on the whole docstring"""
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parts = []
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if "description" in doc:
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parts.append(doc["description"] or "")
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if method in doc and "description" in doc[method]:
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parts.append(doc[method]["description"])
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if doc[method]["docstring"]["details"]:
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parts.append(doc[method]["docstring"]["details"])
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return "\n".join(parts).strip()
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def operation_id_for(self, doc, method):
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"""Extract the operation id"""
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return (
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doc[method]["id"]
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if "id" in doc[method]
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else self.api.default_id(doc["name"], method)
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)
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def parameters_for(self, doc):
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params = []
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for name, param in doc["params"].items():
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param["name"] = name
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if "type" not in param and "schema" not in param:
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param["type"] = "string"
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if "in" not in param:
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param["in"] = "query"
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|
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if "type" in param and "schema" not in param:
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ptype = param.get("type", None)
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if isinstance(ptype, (list, tuple)):
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typ = ptype[0]
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param["type"] = "array"
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param["items"] = {"type": PY_TYPES.get(typ, typ)}
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elif isinstance(ptype, (type, type(None))) and ptype in PY_TYPES:
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param["type"] = PY_TYPES[ptype]
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params.append(param)
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|
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# Handle fields mask
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mask = doc.get("__mask__")
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if mask and current_app.config["RESTX_MASK_SWAGGER"]:
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param = {
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"name": current_app.config["RESTX_MASK_HEADER"],
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"in": "header",
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"type": "string",
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"format": "mask",
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"description": "An optional fields mask",
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}
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if isinstance(mask, str):
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param["default"] = mask
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params.append(param)
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return params
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def responses_for(self, doc, method):
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# TODO: simplify/refactor responses/model handling
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responses = {}
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|
for d in doc, doc[method]:
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if "responses" in d:
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|
for code, response in d["responses"].items():
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code = str(code)
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if isinstance(response, str):
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description = response
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model = None
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kwargs = {}
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elif len(response) == 3:
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description, model, kwargs = response
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elif len(response) == 2:
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description, model = response
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kwargs = {}
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else:
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raise ValueError("Unsupported response specification")
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description = description or DEFAULT_RESPONSE_DESCRIPTION
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if code in responses:
|
|
responses[code].update(description=description)
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else:
|
|
responses[code] = {"description": description}
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if model:
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schema = self.serialize_schema(model)
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|
envelope = kwargs.get("envelope")
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if envelope:
|
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schema = {"properties": {envelope: schema}}
|
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responses[code]["schema"] = schema
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self.process_headers(
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responses[code], doc, method, kwargs.get("headers")
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)
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|
if "model" in d:
|
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code = str(d.get("default_code", HTTPStatus.OK))
|
|
if code not in responses:
|
|
responses[code] = self.process_headers(
|
|
DEFAULT_RESPONSE.copy(), doc, method
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|
)
|
|
responses[code]["schema"] = self.serialize_schema(d["model"])
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|
|
if "docstring" in d:
|
|
for name, description in d["docstring"]["raises"].items():
|
|
for exception, handler in self.api.error_handlers.items():
|
|
error_responses = getattr(handler, "__apidoc__", {}).get(
|
|
"responses", {}
|
|
)
|
|
code = (
|
|
str(list(error_responses.keys())[0])
|
|
if error_responses
|
|
else None
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|
)
|
|
if code and exception.__name__ == name:
|
|
responses[code] = {"$ref": "#/responses/{0}".format(name)}
|
|
break
|
|
|
|
if not responses:
|
|
responses[str(HTTPStatus.OK.value)] = self.process_headers(
|
|
DEFAULT_RESPONSE.copy(), doc, method
|
|
)
|
|
return responses
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|
|
|
def process_headers(self, response, doc, method=None, headers=None):
|
|
method_doc = doc.get(method, {})
|
|
if "headers" in doc or "headers" in method_doc or headers:
|
|
response["headers"] = dict(
|
|
(k, _clean_header(v))
|
|
for k, v in itertools.chain(
|
|
doc.get("headers", {}).items(),
|
|
method_doc.get("headers", {}).items(),
|
|
(headers or {}).items(),
|
|
)
|
|
)
|
|
return response
|
|
|
|
def serialize_definitions(self):
|
|
return dict(
|
|
(name, model.__schema__) for name, model in self._registered_models.items()
|
|
)
|
|
|
|
def serialize_schema(self, model):
|
|
if isinstance(model, (list, tuple)):
|
|
model = model[0]
|
|
return {
|
|
"type": "array",
|
|
"items": self.serialize_schema(model),
|
|
}
|
|
|
|
elif isinstance(model, ModelBase):
|
|
self.register_model(model)
|
|
return ref(model)
|
|
|
|
elif isinstance(model, str):
|
|
self.register_model(model)
|
|
return ref(model)
|
|
|
|
elif isclass(model) and issubclass(model, fields.Raw):
|
|
return self.serialize_schema(model())
|
|
|
|
elif isinstance(model, fields.Raw):
|
|
return model.__schema__
|
|
|
|
elif isinstance(model, (type, type(None))) and model in PY_TYPES:
|
|
return {"type": PY_TYPES[model]}
|
|
|
|
raise ValueError("Model {0} not registered".format(model))
|
|
|
|
def register_model(self, model):
|
|
name = model.name if isinstance(model, ModelBase) else model
|
|
if name not in self.api.models:
|
|
raise ValueError("Model {0} not registered".format(name))
|
|
specs = self.api.models[name]
|
|
if name in self._registered_models:
|
|
return ref(model)
|
|
self._registered_models[name] = specs
|
|
if isinstance(specs, ModelBase):
|
|
for parent in specs.__parents__:
|
|
self.register_model(parent)
|
|
if isinstance(specs, (Model, OrderedModel)):
|
|
for field in specs.values():
|
|
self.register_field(field)
|
|
return ref(model)
|
|
|
|
def register_field(self, field):
|
|
if isinstance(field, fields.Polymorph):
|
|
for model in field.mapping.values():
|
|
self.register_model(model)
|
|
elif isinstance(field, fields.Nested):
|
|
self.register_model(field.nested)
|
|
elif isinstance(field, (fields.List, fields.Wildcard)):
|
|
self.register_field(field.container)
|
|
|
|
def security_for(self, doc, method):
|
|
security = None
|
|
if "security" in doc:
|
|
auth = doc["security"]
|
|
security = self.security_requirements(auth)
|
|
|
|
if "security" in doc[method]:
|
|
auth = doc[method]["security"]
|
|
security = self.security_requirements(auth)
|
|
|
|
return security
|
|
|
|
def security_requirements(self, value):
|
|
if isinstance(value, (list, tuple)):
|
|
return [self.security_requirement(v) for v in value]
|
|
elif value:
|
|
requirement = self.security_requirement(value)
|
|
return [requirement] if requirement else None
|
|
else:
|
|
return []
|
|
|
|
def security_requirement(self, value):
|
|
if isinstance(value, (str)):
|
|
return {value: []}
|
|
elif isinstance(value, dict):
|
|
return dict(
|
|
(k, v if isinstance(v, (list, tuple)) else [v])
|
|
for k, v in value.items()
|
|
)
|
|
else:
|
|
return None
|