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# -*- coding: utf-8 -*-
"""
werkzeug
~~~~~~~~
Werkzeug is the Swiss Army knife of Python web development.
It provides useful classes and functions for any WSGI application to make
the life of a python web developer much easier. All of the provided
classes are independent from each other so you can mix it with any other
library.
:copyright: 2007 Pallets
:license: BSD-3-Clause
"""
import sys
from types import ModuleType
__version__ = "0.15.4"
# This import magic raises concerns quite often which is why the implementation
# and motivation is explained here in detail now.
#
# The majority of the functions and classes provided by Werkzeug work on the
# HTTP and WSGI layer. There is no useful grouping for those which is why
# they are all importable from "werkzeug" instead of the modules where they are
# implemented. The downside of that is, that now everything would be loaded at
# once, even if unused.
#
# The implementation of a lazy-loading module in this file replaces the
# werkzeug package when imported from within. Attribute access to the werkzeug
# module will then lazily import from the modules that implement the objects.
# import mapping to objects in other modules
all_by_module = {
"werkzeug.debug": ["DebuggedApplication"],
"werkzeug.local": [
"Local",
"LocalManager",
"LocalProxy",
"LocalStack",
"release_local",
],
"werkzeug.serving": ["run_simple"],
"werkzeug.test": ["Client", "EnvironBuilder", "create_environ", "run_wsgi_app"],
"werkzeug.testapp": ["test_app"],
"werkzeug.exceptions": ["abort", "Aborter"],
"werkzeug.urls": [
"url_decode",
"url_encode",
"url_quote",
"url_quote_plus",
"url_unquote",
"url_unquote_plus",
"url_fix",
"Href",
"iri_to_uri",
"uri_to_iri",
],
"werkzeug.formparser": ["parse_form_data"],
"werkzeug.utils": [
"escape",
"environ_property",
"append_slash_redirect",
"redirect",
"cached_property",
"import_string",
"dump_cookie",
"parse_cookie",
"unescape",
"format_string",
"find_modules",
"header_property",
"html",
"xhtml",
"HTMLBuilder",
"validate_arguments",
"ArgumentValidationError",
"bind_arguments",
"secure_filename",
],
"werkzeug.wsgi": [
"get_current_url",
"get_host",
"pop_path_info",
"peek_path_info",
"ClosingIterator",
"FileWrapper",
"make_line_iter",
"LimitedStream",
"responder",
"wrap_file",
"extract_path_info",
],
"werkzeug.datastructures": [
"MultiDict",
"CombinedMultiDict",
"Headers",
"EnvironHeaders",
"ImmutableList",
"ImmutableDict",
"ImmutableMultiDict",
"TypeConversionDict",
"ImmutableTypeConversionDict",
"Accept",
"MIMEAccept",
"CharsetAccept",
"LanguageAccept",
"RequestCacheControl",
"ResponseCacheControl",
"ETags",
"HeaderSet",
"WWWAuthenticate",
"Authorization",
"FileMultiDict",
"CallbackDict",
"FileStorage",
"OrderedMultiDict",
"ImmutableOrderedMultiDict",
],
"werkzeug.useragents": ["UserAgent"],
"werkzeug.http": [
"parse_etags",
"parse_date",
"http_date",
"cookie_date",
"parse_cache_control_header",
"is_resource_modified",
"parse_accept_header",
"parse_set_header",
"quote_etag",
"unquote_etag",
"generate_etag",
"dump_header",
"parse_list_header",
"parse_dict_header",
"parse_authorization_header",
"parse_www_authenticate_header",
"remove_entity_headers",
"is_entity_header",
"remove_hop_by_hop_headers",
"parse_options_header",
"dump_options_header",
"is_hop_by_hop_header",
"unquote_header_value",
"quote_header_value",
"HTTP_STATUS_CODES",
],
"werkzeug.wrappers": [
"BaseResponse",
"BaseRequest",
"Request",
"Response",
"AcceptMixin",
"ETagRequestMixin",
"ETagResponseMixin",
"ResponseStreamMixin",
"CommonResponseDescriptorsMixin",
"UserAgentMixin",
"AuthorizationMixin",
"WWWAuthenticateMixin",
"CommonRequestDescriptorsMixin",
],
"werkzeug.middleware.dispatcher": ["DispatcherMiddleware"],
"werkzeug.middleware.shared_data": ["SharedDataMiddleware"],
"werkzeug.security": ["generate_password_hash", "check_password_hash"],
# the undocumented easteregg ;-)
"werkzeug._internal": ["_easteregg"],
}
# modules that should be imported when accessed as attributes of werkzeug
attribute_modules = frozenset(["exceptions", "routing"])
object_origins = {}
for module, items in all_by_module.items():
for item in items:
object_origins[item] = module
class module(ModuleType):
"""Automatically import objects from the modules."""
def __getattr__(self, name):
if name in object_origins:
module = __import__(object_origins[name], None, None, [name])
for extra_name in all_by_module[module.__name__]:
setattr(self, extra_name, getattr(module, extra_name))
return getattr(module, name)
elif name in attribute_modules:
__import__("werkzeug." + name)
return ModuleType.__getattribute__(self, name)
def __dir__(self):
"""Just show what we want to show."""
result = list(new_module.__all__)
result.extend(
(
"__file__",
"__doc__",
"__all__",
"__docformat__",
"__name__",
"__path__",
"__package__",
"__version__",
)
)
return result
# keep a reference to this module so that it's not garbage collected
old_module = sys.modules["werkzeug"]
# setup the new module and patch it into the dict of loaded modules
new_module = sys.modules["werkzeug"] = module("werkzeug")
new_module.__dict__.update(
{
"__file__": __file__,
"__package__": "werkzeug",
"__path__": __path__,
"__doc__": __doc__,
"__version__": __version__,
"__all__": tuple(object_origins) + tuple(attribute_modules),
"__docformat__": "restructuredtext en",
}
)
# Due to bootstrapping issues we need to import exceptions here.
# Don't ask :-(
__import__("werkzeug.exceptions")
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