mirror of https://github.com/morpheus65535/bazarr
459 lines
16 KiB
Python
459 lines
16 KiB
Python
import decimal
|
|
|
|
try:
|
|
from collections.abc import Hashable
|
|
except ImportError:
|
|
from collections import Hashable
|
|
from copy import deepcopy
|
|
from flask import current_app, request
|
|
|
|
from werkzeug.datastructures import MultiDict, FileStorage
|
|
from werkzeug import exceptions
|
|
|
|
from .errors import abort, SpecsError
|
|
from .marshalling import marshal
|
|
from .model import Model
|
|
from ._http import HTTPStatus
|
|
|
|
|
|
class ParseResult(dict):
|
|
"""
|
|
The default result container as an Object dict.
|
|
"""
|
|
|
|
def __getattr__(self, name):
|
|
try:
|
|
return self[name]
|
|
except KeyError:
|
|
raise AttributeError(name)
|
|
|
|
def __setattr__(self, name, value):
|
|
self[name] = value
|
|
|
|
|
|
_friendly_location = {
|
|
"json": "the JSON body",
|
|
"form": "the post body",
|
|
"args": "the query string",
|
|
"values": "the post body or the query string",
|
|
"headers": "the HTTP headers",
|
|
"cookies": "the request's cookies",
|
|
"files": "an uploaded file",
|
|
}
|
|
|
|
#: Maps Flask-RESTX RequestParser locations to Swagger ones
|
|
LOCATIONS = {
|
|
"args": "query",
|
|
"form": "formData",
|
|
"headers": "header",
|
|
"json": "body",
|
|
"values": "query",
|
|
"files": "formData",
|
|
}
|
|
|
|
#: Maps Python primitives types to Swagger ones
|
|
PY_TYPES = {
|
|
int: "integer",
|
|
str: "string",
|
|
bool: "boolean",
|
|
float: "number",
|
|
None: "void",
|
|
}
|
|
|
|
SPLIT_CHAR = ","
|
|
|
|
|
|
class Argument(object):
|
|
"""
|
|
:param name: Either a name or a list of option strings, e.g. foo or -f, --foo.
|
|
:param default: The value produced if the argument is absent from the request.
|
|
:param dest: The name of the attribute to be added to the object
|
|
returned by :meth:`~reqparse.RequestParser.parse_args()`.
|
|
:param bool required: Whether or not the argument may be omitted (optionals only).
|
|
:param string action: The basic type of action to be taken when this argument
|
|
is encountered in the request. Valid options are "store" and "append".
|
|
:param bool ignore: Whether to ignore cases where the argument fails type conversion
|
|
:param type: The type to which the request argument should be converted.
|
|
If a type raises an exception, the message in the error will be returned in the response.
|
|
Defaults to :class:`str`.
|
|
:param location: The attributes of the :class:`flask.Request` object
|
|
to source the arguments from (ex: headers, args, etc.), can be an
|
|
iterator. The last item listed takes precedence in the result set.
|
|
:param choices: A container of the allowable values for the argument.
|
|
:param help: A brief description of the argument, returned in the
|
|
response when the argument is invalid. May optionally contain
|
|
an "{error_msg}" interpolation token, which will be replaced with
|
|
the text of the error raised by the type converter.
|
|
:param bool case_sensitive: Whether argument values in the request are
|
|
case sensitive or not (this will convert all values to lowercase)
|
|
:param bool store_missing: Whether the arguments default value should
|
|
be stored if the argument is missing from the request.
|
|
:param bool trim: If enabled, trims whitespace around the argument.
|
|
:param bool nullable: If enabled, allows null value in argument.
|
|
"""
|
|
|
|
def __init__(
|
|
self,
|
|
name,
|
|
default=None,
|
|
dest=None,
|
|
required=False,
|
|
ignore=False,
|
|
type=str,
|
|
location=(
|
|
"json",
|
|
"values",
|
|
),
|
|
choices=(),
|
|
action="store",
|
|
help=None,
|
|
operators=("=",),
|
|
case_sensitive=True,
|
|
store_missing=True,
|
|
trim=False,
|
|
nullable=True,
|
|
):
|
|
self.name = name
|
|
self.default = default
|
|
self.dest = dest
|
|
self.required = required
|
|
self.ignore = ignore
|
|
self.location = location
|
|
self.type = type
|
|
self.choices = choices
|
|
self.action = action
|
|
self.help = help
|
|
self.case_sensitive = case_sensitive
|
|
self.operators = operators
|
|
self.store_missing = store_missing
|
|
self.trim = trim
|
|
self.nullable = nullable
|
|
|
|
def source(self, request):
|
|
"""
|
|
Pulls values off the request in the provided location
|
|
:param request: The flask request object to parse arguments from
|
|
"""
|
|
if isinstance(self.location, str):
|
|
if self.location in {"json", "get_json"}:
|
|
value = request.get_json(silent=True)
|
|
else:
|
|
value = getattr(request, self.location, MultiDict())
|
|
if callable(value):
|
|
value = value()
|
|
if value is not None:
|
|
return value
|
|
else:
|
|
values = MultiDict()
|
|
for l in self.location:
|
|
if l in {"json", "get_json"}:
|
|
value = request.get_json(silent=True)
|
|
else:
|
|
value = getattr(request, l, None)
|
|
if callable(value):
|
|
value = value()
|
|
if value is not None:
|
|
values.update(value)
|
|
return values
|
|
|
|
return MultiDict()
|
|
|
|
def convert(self, value, op):
|
|
# Don't cast None
|
|
if value is None:
|
|
if not self.nullable:
|
|
raise ValueError("Must not be null!")
|
|
return None
|
|
|
|
elif isinstance(self.type, Model) and isinstance(value, dict):
|
|
return marshal(value, self.type)
|
|
|
|
# and check if we're expecting a filestorage and haven't overridden `type`
|
|
# (required because the below instantiation isn't valid for FileStorage)
|
|
elif isinstance(value, FileStorage) and self.type == FileStorage:
|
|
return value
|
|
|
|
try:
|
|
return self.type(value, self.name, op)
|
|
except TypeError:
|
|
try:
|
|
if self.type is decimal.Decimal:
|
|
return self.type(str(value), self.name)
|
|
else:
|
|
return self.type(value, self.name)
|
|
except TypeError:
|
|
return self.type(value)
|
|
|
|
def handle_validation_error(self, error, bundle_errors):
|
|
"""
|
|
Called when an error is raised while parsing. Aborts the request
|
|
with a 400 status and an error message
|
|
|
|
:param error: the error that was raised
|
|
:param bool bundle_errors: do not abort when first error occurs, return a
|
|
dict with the name of the argument and the error message to be
|
|
bundled
|
|
"""
|
|
error_str = str(error)
|
|
error_msg = " ".join([str(self.help), error_str]) if self.help else error_str
|
|
errors = {self.name: error_msg}
|
|
|
|
if bundle_errors:
|
|
return ValueError(error), errors
|
|
abort(HTTPStatus.BAD_REQUEST, "Input payload validation failed", errors=errors)
|
|
|
|
def parse(self, request, bundle_errors=False):
|
|
"""
|
|
Parses argument value(s) from the request, converting according to
|
|
the argument's type.
|
|
|
|
:param request: The flask request object to parse arguments from
|
|
:param bool bundle_errors: do not abort when first error occurs, return a
|
|
dict with the name of the argument and the error message to be
|
|
bundled
|
|
"""
|
|
bundle_errors = current_app.config.get("BUNDLE_ERRORS", False) or bundle_errors
|
|
source = self.source(request)
|
|
|
|
results = []
|
|
|
|
# Sentinels
|
|
_not_found = False
|
|
_found = True
|
|
|
|
for operator in self.operators:
|
|
name = self.name + operator.replace("=", "", 1)
|
|
if name in source:
|
|
# Account for MultiDict and regular dict
|
|
if hasattr(source, "getlist"):
|
|
values = source.getlist(name)
|
|
else:
|
|
values = [source.get(name)]
|
|
|
|
for value in values:
|
|
if hasattr(value, "strip") and self.trim:
|
|
value = value.strip()
|
|
if hasattr(value, "lower") and not self.case_sensitive:
|
|
value = value.lower()
|
|
|
|
if hasattr(self.choices, "__iter__"):
|
|
self.choices = [choice.lower() for choice in self.choices]
|
|
|
|
try:
|
|
if self.action == "split":
|
|
value = [
|
|
self.convert(v, operator)
|
|
for v in value.split(SPLIT_CHAR)
|
|
]
|
|
else:
|
|
value = self.convert(value, operator)
|
|
except Exception as error:
|
|
if self.ignore:
|
|
continue
|
|
return self.handle_validation_error(error, bundle_errors)
|
|
|
|
if self.choices and value not in self.choices:
|
|
msg = "The value '{0}' is not a valid choice for '{1}'.".format(
|
|
value, name
|
|
)
|
|
return self.handle_validation_error(msg, bundle_errors)
|
|
|
|
if name in request.unparsed_arguments:
|
|
request.unparsed_arguments.pop(name)
|
|
results.append(value)
|
|
|
|
if not results and self.required:
|
|
if isinstance(self.location, str):
|
|
location = _friendly_location.get(self.location, self.location)
|
|
else:
|
|
locations = [_friendly_location.get(loc, loc) for loc in self.location]
|
|
location = " or ".join(locations)
|
|
error_msg = "Missing required parameter in {0}".format(location)
|
|
return self.handle_validation_error(error_msg, bundle_errors)
|
|
|
|
if not results:
|
|
if callable(self.default):
|
|
return self.default(), _not_found
|
|
else:
|
|
return self.default, _not_found
|
|
|
|
if self.action == "append":
|
|
return results, _found
|
|
|
|
if self.action == "store" or len(results) == 1:
|
|
return results[0], _found
|
|
return results, _found
|
|
|
|
@property
|
|
def __schema__(self):
|
|
if self.location == "cookie":
|
|
return
|
|
param = {"name": self.name, "in": LOCATIONS.get(self.location, "query")}
|
|
_handle_arg_type(self, param)
|
|
if self.required:
|
|
param["required"] = True
|
|
if self.help:
|
|
param["description"] = self.help
|
|
if self.default is not None:
|
|
param["default"] = (
|
|
self.default() if callable(self.default) else self.default
|
|
)
|
|
if self.action == "append":
|
|
param["items"] = {"type": param["type"]}
|
|
if "pattern" in param:
|
|
param["items"]["pattern"] = param.pop("pattern")
|
|
param["type"] = "array"
|
|
param["collectionFormat"] = "multi"
|
|
if self.action == "split":
|
|
param["items"] = {"type": param["type"]}
|
|
param["type"] = "array"
|
|
param["collectionFormat"] = "csv"
|
|
if self.choices:
|
|
param["enum"] = self.choices
|
|
return param
|
|
|
|
|
|
class RequestParser(object):
|
|
"""
|
|
Enables adding and parsing of multiple arguments in the context of a single request.
|
|
Ex::
|
|
|
|
from flask_restx import RequestParser
|
|
|
|
parser = RequestParser()
|
|
parser.add_argument('foo')
|
|
parser.add_argument('int_bar', type=int)
|
|
args = parser.parse_args()
|
|
|
|
:param bool trim: If enabled, trims whitespace on all arguments in this parser
|
|
:param bool bundle_errors: If enabled, do not abort when first error occurs,
|
|
return a dict with the name of the argument and the error message to be
|
|
bundled and return all validation errors
|
|
"""
|
|
|
|
def __init__(
|
|
self,
|
|
argument_class=Argument,
|
|
result_class=ParseResult,
|
|
trim=False,
|
|
bundle_errors=False,
|
|
):
|
|
self.args = []
|
|
self.argument_class = argument_class
|
|
self.result_class = result_class
|
|
self.trim = trim
|
|
self.bundle_errors = bundle_errors
|
|
|
|
def add_argument(self, *args, **kwargs):
|
|
"""
|
|
Adds an argument to be parsed.
|
|
|
|
Accepts either a single instance of Argument or arguments to be passed
|
|
into :class:`Argument`'s constructor.
|
|
|
|
See :class:`Argument`'s constructor for documentation on the available options.
|
|
"""
|
|
|
|
if len(args) == 1 and isinstance(args[0], self.argument_class):
|
|
self.args.append(args[0])
|
|
else:
|
|
self.args.append(self.argument_class(*args, **kwargs))
|
|
|
|
# Do not know what other argument classes are out there
|
|
if self.trim and self.argument_class is Argument:
|
|
# enable trim for appended element
|
|
self.args[-1].trim = kwargs.get("trim", self.trim)
|
|
|
|
return self
|
|
|
|
def parse_args(self, req=None, strict=False):
|
|
"""
|
|
Parse all arguments from the provided request and return the results as a ParseResult
|
|
|
|
:param bool strict: if req includes args not in parser, throw 400 BadRequest exception
|
|
:return: the parsed results as :class:`ParseResult` (or any class defined as :attr:`result_class`)
|
|
:rtype: ParseResult
|
|
"""
|
|
if req is None:
|
|
req = request
|
|
|
|
result = self.result_class()
|
|
|
|
# A record of arguments not yet parsed; as each is found
|
|
# among self.args, it will be popped out
|
|
req.unparsed_arguments = (
|
|
dict(self.argument_class("").source(req)) if strict else {}
|
|
)
|
|
errors = {}
|
|
for arg in self.args:
|
|
value, found = arg.parse(req, self.bundle_errors)
|
|
if isinstance(value, ValueError):
|
|
errors.update(found)
|
|
found = None
|
|
if found or arg.store_missing:
|
|
result[arg.dest or arg.name] = value
|
|
if errors:
|
|
abort(
|
|
HTTPStatus.BAD_REQUEST, "Input payload validation failed", errors=errors
|
|
)
|
|
|
|
if strict and req.unparsed_arguments:
|
|
arguments = ", ".join(req.unparsed_arguments.keys())
|
|
msg = "Unknown arguments: {0}".format(arguments)
|
|
raise exceptions.BadRequest(msg)
|
|
|
|
return result
|
|
|
|
def copy(self):
|
|
"""Creates a copy of this RequestParser with the same set of arguments"""
|
|
parser_copy = self.__class__(self.argument_class, self.result_class)
|
|
parser_copy.args = deepcopy(self.args)
|
|
parser_copy.trim = self.trim
|
|
parser_copy.bundle_errors = self.bundle_errors
|
|
return parser_copy
|
|
|
|
def replace_argument(self, name, *args, **kwargs):
|
|
"""Replace the argument matching the given name with a new version."""
|
|
new_arg = self.argument_class(name, *args, **kwargs)
|
|
for index, arg in enumerate(self.args[:]):
|
|
if new_arg.name == arg.name:
|
|
del self.args[index]
|
|
self.args.append(new_arg)
|
|
break
|
|
return self
|
|
|
|
def remove_argument(self, name):
|
|
"""Remove the argument matching the given name."""
|
|
for index, arg in enumerate(self.args[:]):
|
|
if name == arg.name:
|
|
del self.args[index]
|
|
break
|
|
return self
|
|
|
|
@property
|
|
def __schema__(self):
|
|
params = []
|
|
locations = set()
|
|
for arg in self.args:
|
|
param = arg.__schema__
|
|
if param:
|
|
params.append(param)
|
|
locations.add(param["in"])
|
|
if "body" in locations and "formData" in locations:
|
|
raise SpecsError("Can't use formData and body at the same time")
|
|
return params
|
|
|
|
|
|
def _handle_arg_type(arg, param):
|
|
if isinstance(arg.type, Hashable) and arg.type in PY_TYPES:
|
|
param["type"] = PY_TYPES[arg.type]
|
|
elif hasattr(arg.type, "__apidoc__"):
|
|
param["type"] = arg.type.__apidoc__["name"]
|
|
param["in"] = "body"
|
|
elif hasattr(arg.type, "__schema__"):
|
|
param.update(arg.type.__schema__)
|
|
elif arg.location == "files":
|
|
param["type"] = "file"
|
|
else:
|
|
param["type"] = "string"
|