mirror of https://github.com/morpheus65535/bazarr
368 lines
14 KiB
Python
368 lines
14 KiB
Python
from copy import deepcopy
|
|
|
|
try:
|
|
from collections.abc import MutableSequence
|
|
except ImportError:
|
|
from collections import MutableSequence
|
|
from flask import current_app, request
|
|
from werkzeug.datastructures import MultiDict, FileStorage
|
|
from werkzeug import exceptions
|
|
import flask_restful
|
|
import decimal
|
|
import six
|
|
|
|
|
|
class Namespace(dict):
|
|
def __getattr__(self, name):
|
|
try:
|
|
return self[name]
|
|
except KeyError:
|
|
raise AttributeError(name)
|
|
|
|
def __setattr__(self, name, value):
|
|
self[name] = value
|
|
|
|
|
|
_friendly_location = {
|
|
u'json': u'the JSON body',
|
|
u'form': u'the post body',
|
|
u'args': u'the query string',
|
|
u'values': u'the post body or the query string',
|
|
u'headers': u'the HTTP headers',
|
|
u'cookies': u'the request\'s cookies',
|
|
u'files': u'an uploaded file',
|
|
}
|
|
|
|
text_type = lambda x: six.text_type(x)
|
|
|
|
|
|
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 action: The basic type of action to be taken when this argument
|
|
is encountered in the request. Valid options are "store" and "append".
|
|
:param 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:`unicode`
|
|
in python2 and :class:`str` in python3.
|
|
: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=text_type, 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 __str__(self):
|
|
if len(self.choices) > 5:
|
|
choices = self.choices[0:3]
|
|
choices.append('...')
|
|
choices.append(self.choices[-1])
|
|
else:
|
|
choices = self.choices
|
|
return 'Name: {0}, type: {1}, choices: {2}'.format(self.name, self.type, choices)
|
|
|
|
def __repr__(self):
|
|
return "{0}('{1}', default={2}, dest={3}, required={4}, ignore={5}, location={6}, " \
|
|
"type=\"{7}\", choices={8}, action='{9}', help={10}, case_sensitive={11}, " \
|
|
"operators={12}, store_missing={13}, trim={14}, nullable={15})".format(
|
|
self.__class__.__name__, self.name, self.default, self.dest, self.required, self.ignore, self.location,
|
|
self.type, self.choices, self.action, self.help, self.case_sensitive,
|
|
self.operators, self.store_missing, self.trim, self.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, six.string_types):
|
|
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:
|
|
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 self.nullable:
|
|
return None
|
|
else:
|
|
raise ValueError('Must not be null!')
|
|
|
|
# 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))
|
|
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 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 = six.text_type(error)
|
|
error_msg = self.help.format(error_msg=error_str) if self.help else error_str
|
|
msg = {self.name: error_msg}
|
|
|
|
if current_app.config.get("BUNDLE_ERRORS", False) or bundle_errors:
|
|
return error, msg
|
|
flask_restful.abort(400, message=msg)
|
|
|
|
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 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
|
|
"""
|
|
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)
|
|
if not (isinstance(values, MutableSequence) and self.action == 'append'):
|
|
values = [values]
|
|
|
|
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:
|
|
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:
|
|
if current_app.config.get("BUNDLE_ERRORS", False) or bundle_errors:
|
|
return self.handle_validation_error(
|
|
ValueError(u"{0} is not a valid choice".format(
|
|
value)), bundle_errors)
|
|
self.handle_validation_error(
|
|
ValueError(u"{0} is not a valid choice".format(
|
|
value)), 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, six.string_types):
|
|
error_msg = u"Missing required parameter in {0}".format(
|
|
_friendly_location.get(self.location, self.location)
|
|
)
|
|
else:
|
|
friendly_locations = [_friendly_location.get(loc, loc)
|
|
for loc in self.location]
|
|
error_msg = u"Missing required parameter in {0}".format(
|
|
' or '.join(friendly_locations)
|
|
)
|
|
if current_app.config.get("BUNDLE_ERRORS", False) or bundle_errors:
|
|
return self.handle_validation_error(ValueError(error_msg), bundle_errors)
|
|
self.handle_validation_error(ValueError(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
|
|
|
|
|
|
class RequestParser(object):
|
|
"""Enables adding and parsing of multiple arguments in the context of a
|
|
single request. Ex::
|
|
|
|
from flask_restful import reqparse
|
|
|
|
parser = reqparse.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, namespace_class=Namespace,
|
|
trim=False, bundle_errors=False):
|
|
self.args = []
|
|
self.argument_class = argument_class
|
|
self.namespace_class = namespace_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, http_error_code=400):
|
|
"""Parse all arguments from the provided request and return the results
|
|
as a Namespace
|
|
|
|
:param req: Can be used to overwrite request from Flask
|
|
:param strict: if req includes args not in parser, throw 400 BadRequest exception
|
|
:param http_error_code: use custom error code for `flask_restful.abort()`
|
|
"""
|
|
if req is None:
|
|
req = request
|
|
|
|
namespace = self.namespace_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:
|
|
namespace[arg.dest or arg.name] = value
|
|
if errors:
|
|
flask_restful.abort(http_error_code, message=errors)
|
|
|
|
if strict and req.unparsed_arguments:
|
|
raise exceptions.BadRequest('Unknown arguments: %s'
|
|
% ', '.join(req.unparsed_arguments.keys()))
|
|
|
|
return namespace
|
|
|
|
def copy(self):
|
|
""" Creates a copy of this RequestParser with the same set of arguments """
|
|
parser_copy = self.__class__(self.argument_class, self.namespace_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
|