mirror of
https://github.com/Grasscutters/mitmproxy.git
synced 2024-11-30 03:14:22 +00:00
93 lines
2.3 KiB
Python
93 lines
2.3 KiB
Python
from __future__ import absolute_import, print_function, division
|
|
import os.path
|
|
import re
|
|
import importlib
|
|
import inspect
|
|
|
|
|
|
def setbit(byte, offset, value):
|
|
"""
|
|
Set a bit in a byte to 1 if value is truthy, 0 if not.
|
|
"""
|
|
if value:
|
|
return byte | (1 << offset)
|
|
else:
|
|
return byte & ~(1 << offset)
|
|
|
|
|
|
def getbit(byte, offset):
|
|
mask = 1 << offset
|
|
return bool(byte & mask)
|
|
|
|
|
|
class BiDi(object):
|
|
|
|
"""
|
|
A wee utility class for keeping bi-directional mappings, like field
|
|
constants in protocols. Names are attributes on the object, dict-like
|
|
access maps values to names:
|
|
|
|
CONST = BiDi(a=1, b=2)
|
|
assert CONST.a == 1
|
|
assert CONST.get_name(1) == "a"
|
|
"""
|
|
|
|
def __init__(self, **kwargs):
|
|
self.names = kwargs
|
|
self.values = {}
|
|
for k, v in kwargs.items():
|
|
self.values[v] = k
|
|
if len(self.names) != len(self.values):
|
|
raise ValueError("Duplicate values not allowed.")
|
|
|
|
def __getattr__(self, k):
|
|
if k in self.names:
|
|
return self.names[k]
|
|
raise AttributeError("No such attribute: %s", k)
|
|
|
|
def get_name(self, n, default=None):
|
|
return self.values.get(n, default)
|
|
|
|
|
|
class Data(object):
|
|
|
|
def __init__(self, name):
|
|
m = importlib.import_module(name)
|
|
dirname = os.path.dirname(inspect.getsourcefile(m))
|
|
self.dirname = os.path.abspath(dirname)
|
|
|
|
def path(self, path):
|
|
"""
|
|
Returns a path to the package data housed at 'path' under this
|
|
module.Path can be a path to a file, or to a directory.
|
|
|
|
This function will raise ValueError if the path does not exist.
|
|
"""
|
|
fullpath = os.path.join(self.dirname, path)
|
|
if not os.path.exists(fullpath):
|
|
raise ValueError("dataPath: %s does not exist." % fullpath)
|
|
return fullpath
|
|
|
|
|
|
_label_valid = re.compile(b"(?!-)[A-Z\d-]{1,63}(?<!-)$", re.IGNORECASE)
|
|
|
|
|
|
def is_valid_host(host):
|
|
# type: (bytes) -> bool
|
|
"""
|
|
Checks if a hostname is valid.
|
|
"""
|
|
try:
|
|
host.decode("idna")
|
|
except ValueError:
|
|
return False
|
|
if len(host) > 255:
|
|
return False
|
|
if host[-1] == b".":
|
|
host = host[:-1]
|
|
return all(_label_valid.match(x) for x in host.split(b"."))
|
|
|
|
|
|
def is_valid_port(port):
|
|
return 0 <= port <= 65535
|