def gettext_popen_wrapper(args, os_err_exc_type=CommandError, stdout_encoding="utf-8"):
"""
Makes sure text obtained from stdout of gettext utilities is Unicode.
"""
# This both decodes utf-8 and cleans line endings. Simply using
# popen_wrapper(universal_newlines=True) doesn't properly handle the
# encoding. This goes back to popen's flaky support for encoding:
# https://bugs.python.org/issue6135. This is a solution for #23271, #21928.
# No need to do anything on Python 2 because it's already a byte-string there.
manual_io_wrapper = six.PY3 and stdout_encoding != DEFAULT_LOCALE_ENCODING
stdout, stderr, status_code = popen_wrapper(args, os_err_exc_type=os_err_exc_type,
universal_newlines=not manual_io_wrapper)
if manual_io_wrapper:
stdout = io.TextIOWrapper(io.BytesIO(stdout), encoding=stdout_encoding).read()
if six.PY2:
stdout = stdout.decode(stdout_encoding)
return stdout, stderr, status_code
python类PY3的实例源码
def get_environ(self):
# Strip all headers with underscores in the name before constructing
# the WSGI environ. This prevents header-spoofing based on ambiguity
# between underscores and dashes both normalized to underscores in WSGI
# env vars. Nginx and Apache 2.4+ both do this as well.
for k, v in self.headers.items():
if '_' in k:
del self.headers[k]
env = super(WSGIRequestHandler, self).get_environ()
path = self.path
if '?' in path:
path = path.partition('?')[0]
path = uri_to_iri(path).encode(UTF_8)
# Under Python 3, non-ASCII values in the WSGI environ are arbitrarily
# decoded with ISO-8859-1. We replicate this behavior here.
# Refs comment in `get_bytes_from_wsgi()`.
env['PATH_INFO'] = path.decode(ISO_8859_1) if six.PY3 else path
return env
def _ask_default(self):
print("Please enter the default value now, as valid Python")
print("The datetime and django.utils.timezone modules are available, so you can do e.g. timezone.now()")
while True:
if six.PY3:
# Six does not correctly abstract over the fact that
# py3 input returns a unicode string, while py2 raw_input
# returns a bytestring.
code = input(">>> ")
else:
code = input(">>> ").decode(sys.stdin.encoding)
if not code:
print("Please enter some code, or 'exit' (with no quotes) to exit.")
elif code == "exit":
sys.exit(1)
else:
try:
return eval(code, {}, {"datetime": datetime_safe, "timezone": timezone})
except (SyntaxError, NameError) as e:
print("Invalid input: %s" % e)
def _get_queryset_methods(cls, queryset_class):
def create_method(name, method):
def manager_method(self, *args, **kwargs):
return getattr(self.get_queryset(), name)(*args, **kwargs)
manager_method.__name__ = method.__name__
manager_method.__doc__ = method.__doc__
return manager_method
new_methods = {}
# Refs http://bugs.python.org/issue1785.
predicate = inspect.isfunction if six.PY3 else inspect.ismethod
for name, method in inspect.getmembers(queryset_class, predicate=predicate):
# Only copy missing methods.
if hasattr(cls, name):
continue
# Only copy public methods or methods with the attribute `queryset_only=False`.
queryset_only = getattr(method, 'queryset_only', None)
if queryset_only or (queryset_only is None and name.startswith('_')):
continue
# Copy the method onto the manager.
new_methods[name] = create_method(name, method)
return new_methods
def constant_time_compare(val1, val2):
"""
Returns True if the two strings are equal, False otherwise.
The time taken is independent of the number of characters that match.
For the sake of simplicity, this function executes in constant time only
when the two strings have the same length. It short-circuits when they
have different lengths. Since Django only uses it to compare hashes of
known expected length, this is acceptable.
"""
if len(val1) != len(val2):
return False
result = 0
if six.PY3 and isinstance(val1, bytes) and isinstance(val2, bytes):
for x, y in zip(val1, val2):
result |= x ^ y
else:
for x, y in zip(val1, val2):
result |= ord(x) ^ ord(y)
return result == 0
def get_environ(self):
# Strip all headers with underscores in the name before constructing
# the WSGI environ. This prevents header-spoofing based on ambiguity
# between underscores and dashes both normalized to underscores in WSGI
# env vars. Nginx and Apache 2.4+ both do this as well.
for k, v in self.headers.items():
if '_' in k:
del self.headers[k]
env = super(WSGIRequestHandler, self).get_environ()
path = self.path
if '?' in path:
path = path.partition('?')[0]
path = uri_to_iri(path).encode(UTF_8)
# Under Python 3, non-ASCII values in the WSGI environ are arbitrarily
# decoded with ISO-8859-1. We replicate this behavior here.
# Refs comment in `get_bytes_from_wsgi()`.
env['PATH_INFO'] = path.decode(ISO_8859_1) if six.PY3 else path
return env
def __init__(self, field, request, params, model, admin_view, field_path):
self.field = field
self.field_path = field_path
self.title = getattr(field, 'verbose_name', field_path)
self.context_params = {}
super(FieldFilter, self).__init__(request, params, model, admin_view)
for name, format in self.lookup_formats.items():
p = format % field_path
self.context_params["%s_name" % name] = FILTER_PREFIX + p
if p in params:
value = prepare_lookup_value(p, params.pop(p))
self.used_params[p] = value
self.context_params["%s_val" % name] = value
else:
self.context_params["%s_val" % name] = ''
arr = map(
lambda kv: setattr(self, 'lookup_' + kv[0], kv[1]),
self.context_params.items()
)
if six.PY3:
list(arr)
def post(self, request, *args, **kwargs):
self.instance_forms()
self.setup_forms()
if self.valid_forms():
self.save_forms()
self.save_models()
self.save_related()
response = self.post_response()
cls_str = str if six.PY3 else basestring
if isinstance(response, cls_str):
return HttpResponseRedirect(response)
else:
return response
return self.get_response()
def view_block(context, block_name, *args, **kwargs):
if 'admin_view' not in context:
return ""
admin_view = context['admin_view']
nodes = []
method_name = 'block_%s' % block_name
cls_str = str if six.PY3 else basestring
for view in [admin_view] + admin_view.plugins:
if hasattr(view, method_name) and callable(getattr(view, method_name)):
block_func = getattr(view, method_name)
result = block_func(context, nodes, *args, **kwargs)
if result and isinstance(result, cls_str):
nodes.append(result)
if nodes:
return mark_safe(''.join(nodes))
else:
return ""
def quote(s):
"""
Ensure that primary key values do not confuse the admin URLs by escaping
any '/', '_' and ':' characters. Similar to urllib.quote, except that the
quoting is slightly different so that it doesn't get automatically
unquoted by the Web browser.
"""
cls_str = str if six.PY3 else basestring
if not isinstance(s, cls_str):
return s
res = list(s)
for i in range(len(res)):
c = res[i]
if c in """:/_#?;@&=+$,"<>%\\""":
res[i] = '_%02X' % ord(c)
return ''.join(res)
def unquote(s):
"""
Undo the effects of quote(). Based heavily on urllib.unquote().
"""
cls_str = str if six.PY3 else basestring
if not isinstance(s, cls_str):
return s
mychr = chr
myatoi = int
list = s.split('_')
res = [list[0]]
myappend = res.append
del list[0]
for item in list:
if item[1:2]:
try:
myappend(mychr(myatoi(item[:2], 16)) + item[2:])
except ValueError:
myappend('_' + item)
else:
myappend('_' + item)
return "".join(res)
def get_actions(self):
if self.actions is None:
return OrderedDict()
actions = [self.get_action(action) for action in self.global_actions]
for klass in self.admin_view.__class__.mro()[::-1]:
class_actions = getattr(klass, 'actions', [])
if not class_actions:
continue
actions.extend(
[self.get_action(action) for action in class_actions])
# get_action might have returned None, so filter any of those out.
actions = filter(None, actions)
if six.PY3:
actions = list(actions)
# Convert the actions into a OrderedDict keyed by name.
actions = OrderedDict([
(name, (ac, name, desc, icon))
for ac, name, desc, icon in actions
])
return actions
def __init__(self, field, request, params, model, admin_view, field_path):
self.field = field
self.field_path = field_path
self.title = getattr(field, 'verbose_name', field_path)
self.context_params = {}
super(FieldFilter, self).__init__(request, params, model, admin_view)
for name, format in self.lookup_formats.items():
p = format % field_path
self.context_params["%s_name" % name] = FILTER_PREFIX + p
if p in params:
value = prepare_lookup_value(p, params.pop(p))
self.used_params[p] = value
self.context_params["%s_val" % name] = value
else:
self.context_params["%s_val" % name] = ''
arr = map(
lambda kv: setattr(self, 'lookup_' + kv[0], kv[1]),
self.context_params.items()
)
if six.PY3:
list(arr)
def post(self, request, *args, **kwargs):
self.instance_forms()
self.setup_forms()
if self.valid_forms():
self.save_forms()
self.save_models()
self.save_related()
response = self.post_response()
cls_str = str if six.PY3 else basestring
if isinstance(response, cls_str):
return HttpResponseRedirect(response)
else:
return response
return self.get_response()
def view_block(context, block_name, *args, **kwargs):
if 'admin_view' not in context:
return ""
admin_view = context['admin_view']
nodes = []
method_name = 'block_%s' % block_name
cls_str = str if six.PY3 else basestring
for view in [admin_view] + admin_view.plugins:
if hasattr(view, method_name) and callable(getattr(view, method_name)):
block_func = getattr(view, method_name)
result = block_func(context, nodes, *args, **kwargs)
if result and isinstance(result, cls_str):
nodes.append(result)
if nodes:
return mark_safe(''.join(nodes))
else:
return ""
def quote(s):
"""
Ensure that primary key values do not confuse the admin URLs by escaping
any '/', '_' and ':' characters. Similar to urllib.quote, except that the
quoting is slightly different so that it doesn't get automatically
unquoted by the Web browser.
"""
cls_str = str if six.PY3 else basestring
if not isinstance(s, cls_str):
return s
res = list(s)
for i in range(len(res)):
c = res[i]
if c in """:/_#?;@&=+$,"<>%\\""":
res[i] = '_%02X' % ord(c)
return ''.join(res)
def unquote(s):
"""
Undo the effects of quote(). Based heavily on urllib.unquote().
"""
cls_str = str if six.PY3 else basestring
if not isinstance(s, cls_str):
return s
mychr = chr
myatoi = int
list = s.split('_')
res = [list[0]]
myappend = res.append
del list[0]
for item in list:
if item[1:2]:
try:
myappend(mychr(myatoi(item[:2], 16)) + item[2:])
except ValueError:
myappend('_' + item)
else:
myappend('_' + item)
return "".join(res)
def get_actions(self):
if self.actions is None:
return OrderedDict()
actions = [self.get_action(action) for action in self.global_actions]
for klass in self.admin_view.__class__.mro()[::-1]:
class_actions = getattr(klass, 'actions', [])
if not class_actions:
continue
actions.extend(
[self.get_action(action) for action in class_actions])
# get_action might have returned None, so filter any of those out.
actions = filter(None, actions)
if six.PY3:
actions = list(actions)
# Convert the actions into a OrderedDict keyed by name.
actions = OrderedDict([
(name, (ac, name, desc, icon))
for ac, name, desc, icon in actions
])
return actions
def __init__(self, field, request, params, model, admin_view, field_path):
self.field = field
self.field_path = field_path
self.title = getattr(field, 'verbose_name', field_path)
self.context_params = {}
super(FieldFilter, self).__init__(request, params, model, admin_view)
for name, format in self.lookup_formats.items():
p = format % field_path
self.context_params["%s_name" % name] = FILTER_PREFIX + p
if p in params:
value = prepare_lookup_value(p, params.pop(p))
self.used_params[p] = value
self.context_params["%s_val" % name] = value
else:
self.context_params["%s_val" % name] = ''
arr = map(
lambda kv: setattr(self, 'lookup_' + kv[0], kv[1]),
self.context_params.items()
)
if six.PY3:
list(arr)
def post(self, request, *args, **kwargs):
self.instance_forms()
self.setup_forms()
if self.valid_forms():
self.save_forms()
self.save_models()
self.save_related()
response = self.post_response()
cls_str = str if six.PY3 else basestring
if isinstance(response, cls_str):
return HttpResponseRedirect(response)
else:
return response
return self.get_response()
def view_block(context, block_name, *args, **kwargs):
if 'admin_view' not in context:
return ""
admin_view = context['admin_view']
nodes = []
method_name = 'block_%s' % block_name
cls_str = str if six.PY3 else basestring
for view in [admin_view] + admin_view.plugins:
if hasattr(view, method_name) and callable(getattr(view, method_name)):
block_func = getattr(view, method_name)
result = block_func(context, nodes, *args, **kwargs)
if result and isinstance(result, cls_str):
nodes.append(result)
if nodes:
return mark_safe(''.join(nodes))
else:
return ""
def quote(s):
"""
Ensure that primary key values do not confuse the admin URLs by escaping
any '/', '_' and ':' characters. Similar to urllib.quote, except that the
quoting is slightly different so that it doesn't get automatically
unquoted by the Web browser.
"""
cls_str = str if six.PY3 else basestring
if not isinstance(s, cls_str):
return s
res = list(s)
for i in range(len(res)):
c = res[i]
if c in """:/_#?;@&=+$,"<>%\\""":
res[i] = '_%02X' % ord(c)
return ''.join(res)
def unquote(s):
"""
Undo the effects of quote(). Based heavily on urllib.unquote().
"""
cls_str = str if six.PY3 else basestring
if not isinstance(s, cls_str):
return s
mychr = chr
myatoi = int
list = s.split('_')
res = [list[0]]
myappend = res.append
del list[0]
for item in list:
if item[1:2]:
try:
myappend(mychr(myatoi(item[:2], 16)) + item[2:])
except ValueError:
myappend('_' + item)
else:
myappend('_' + item)
return "".join(res)
def get_actions(self):
if self.actions is None:
return OrderedDict()
actions = [self.get_action(action) for action in self.global_actions]
for klass in self.admin_view.__class__.mro()[::-1]:
class_actions = getattr(klass, 'actions', [])
if not class_actions:
continue
actions.extend(
[self.get_action(action) for action in class_actions])
# get_action might have returned None, so filter any of those out.
actions = filter(None, actions)
if six.PY3:
actions = list(actions)
# Convert the actions into a OrderedDict keyed by name.
actions = OrderedDict([
(name, (ac, name, desc, icon))
for ac, name, desc, icon in actions
])
return actions
def get_environ(self):
# Strip all headers with underscores in the name before constructing
# the WSGI environ. This prevents header-spoofing based on ambiguity
# between underscores and dashes both normalized to underscores in WSGI
# env vars. Nginx and Apache 2.4+ both do this as well.
for k, v in self.headers.items():
if '_' in k:
del self.headers[k]
env = super(WSGIRequestHandler, self).get_environ()
path = self.path
if '?' in path:
path = path.partition('?')[0]
path = uri_to_iri(path).encode(UTF_8)
# Under Python 3, non-ASCII values in the WSGI environ are arbitrarily
# decoded with ISO-8859-1. We replicate this behavior here.
# Refs comment in `get_bytes_from_wsgi()`.
env['PATH_INFO'] = path.decode(ISO_8859_1) if six.PY3 else path
return env
def logger_has_handlers(logger):
"""
Check if given logger has at least 1 handler associated, return a boolean value.
Since Python 2 doesn't provide Logger.hasHandlers(), we have to perform the lookup by ourself.
"""
if six.PY3:
return logger.hasHandlers()
else:
c = logger
rv = False
while c:
if c.handlers:
rv = True
break
if not c.propagate:
break
else:
c = c.parent
return rv
def gettext_popen_wrapper(args, os_err_exc_type=CommandError, stdout_encoding="utf-8"):
"""
Makes sure text obtained from stdout of gettext utilities is Unicode.
"""
# This both decodes utf-8 and cleans line endings. Simply using
# popen_wrapper(universal_newlines=True) doesn't properly handle the
# encoding. This goes back to popen's flaky support for encoding:
# https://bugs.python.org/issue6135. This is a solution for #23271, #21928.
# No need to do anything on Python 2 because it's already a byte-string there.
manual_io_wrapper = six.PY3 and stdout_encoding != DEFAULT_LOCALE_ENCODING
stdout, stderr, status_code = popen_wrapper(args, os_err_exc_type=os_err_exc_type,
universal_newlines=not manual_io_wrapper)
if manual_io_wrapper:
stdout = io.TextIOWrapper(io.BytesIO(stdout), encoding=stdout_encoding).read()
if six.PY2:
stdout = stdout.decode(stdout_encoding)
return stdout, stderr, status_code
def get_environ(self):
# Strip all headers with underscores in the name before constructing
# the WSGI environ. This prevents header-spoofing based on ambiguity
# between underscores and dashes both normalized to underscores in WSGI
# env vars. Nginx and Apache 2.4+ both do this as well.
for k, v in self.headers.items():
if '_' in k:
del self.headers[k]
env = super(WSGIRequestHandler, self).get_environ()
path = self.path
if '?' in path:
path = path.partition('?')[0]
path = uri_to_iri(path).encode(UTF_8)
# Under Python 3, non-ASCII values in the WSGI environ are arbitrarily
# decoded with ISO-8859-1. We replicate this behavior here.
# Refs comment in `get_bytes_from_wsgi()`.
env['PATH_INFO'] = path.decode(ISO_8859_1) if six.PY3 else path
return env
def gettext_popen_wrapper(args, os_err_exc_type=CommandError, stdout_encoding="utf-8"):
"""
Makes sure text obtained from stdout of gettext utilities is Unicode.
"""
# This both decodes utf-8 and cleans line endings. Simply using
# popen_wrapper(universal_newlines=True) doesn't properly handle the
# encoding. This goes back to popen's flaky support for encoding:
# https://bugs.python.org/issue6135. This is a solution for #23271, #21928.
# No need to do anything on Python 2 because it's already a byte-string there.
manual_io_wrapper = six.PY3 and stdout_encoding != DEFAULT_LOCALE_ENCODING
stdout, stderr, status_code = popen_wrapper(args, os_err_exc_type=os_err_exc_type,
universal_newlines=not manual_io_wrapper)
if manual_io_wrapper:
stdout = io.TextIOWrapper(io.BytesIO(stdout), encoding=stdout_encoding).read()
if six.PY2:
stdout = stdout.decode(stdout_encoding)
return stdout, stderr, status_code
def get_environ(self):
# Strip all headers with underscores in the name before constructing
# the WSGI environ. This prevents header-spoofing based on ambiguity
# between underscores and dashes both normalized to underscores in WSGI
# env vars. Nginx and Apache 2.4+ both do this as well.
for k, v in self.headers.items():
if '_' in k:
del self.headers[k]
env = super(WSGIRequestHandler, self).get_environ()
path = self.path
if '?' in path:
path = path.partition('?')[0]
path = uri_to_iri(path).encode(UTF_8)
# Under Python 3, non-ASCII values in the WSGI environ are arbitrarily
# decoded with ISO-8859-1. We replicate this behavior here.
# Refs comment in `get_bytes_from_wsgi()`.
env['PATH_INFO'] = path.decode(ISO_8859_1) if six.PY3 else path
return env
