Updated script that can be controled by Nodejs web app

lib/python3.13/site-packages/dns/exception.py

@@ -0,0 +1,169 @@
+# Copyright (C) Dnspython Contributors, see LICENSE for text of ISC license
+
+# Copyright (C) 2003-2017 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+"""Common DNS Exceptions.
+
+Dnspython modules may also define their own exceptions, which will
+always be subclasses of ``DNSException``.
+"""
+
+
+from typing import Optional, Set
+
+
+class DNSException(Exception):
+    """Abstract base class shared by all dnspython exceptions.
+
+    It supports two basic modes of operation:
+
+    a) Old/compatible mode is used if ``__init__`` was called with
+    empty *kwargs*.  In compatible mode all *args* are passed
+    to the standard Python Exception class as before and all *args* are
+    printed by the standard ``__str__`` implementation.  Class variable
+    ``msg`` (or doc string if ``msg`` is ``None``) is returned from ``str()``
+    if *args* is empty.
+
+    b) New/parametrized mode is used if ``__init__`` was called with
+    non-empty *kwargs*.
+    In the new mode *args* must be empty and all kwargs must match
+    those set in class variable ``supp_kwargs``. All kwargs are stored inside
+    ``self.kwargs`` and used in a new ``__str__`` implementation to construct
+    a formatted message based on the ``fmt`` class variable, a ``string``.
+
+    In the simplest case it is enough to override the ``supp_kwargs``
+    and ``fmt`` class variables to get nice parametrized messages.
+    """
+
+    msg: Optional[str] = None  # non-parametrized message
+    supp_kwargs: Set[str] = set()  # accepted parameters for _fmt_kwargs (sanity check)
+    fmt: Optional[str] = None  # message parametrized with results from _fmt_kwargs
+
+    def __init__(self, *args, **kwargs):
+        self._check_params(*args, **kwargs)
+        if kwargs:
+            # This call to a virtual method from __init__ is ok in our usage
+            self.kwargs = self._check_kwargs(**kwargs)  # lgtm[py/init-calls-subclass]
+            self.msg = str(self)
+        else:
+            self.kwargs = dict()  # defined but empty for old mode exceptions
+        if self.msg is None:
+            # doc string is better implicit message than empty string
+            self.msg = self.__doc__
+        if args:
+            super().__init__(*args)
+        else:
+            super().__init__(self.msg)
+
+    def _check_params(self, *args, **kwargs):
+        """Old exceptions supported only args and not kwargs.
+
+        For sanity we do not allow to mix old and new behavior."""
+        if args or kwargs:
+            assert bool(args) != bool(
+                kwargs
+            ), "keyword arguments are mutually exclusive with positional args"
+
+    def _check_kwargs(self, **kwargs):
+        if kwargs:
+            assert (
+                set(kwargs.keys()) == self.supp_kwargs
+            ), f"following set of keyword args is required: {self.supp_kwargs}"
+        return kwargs
+
+    def _fmt_kwargs(self, **kwargs):
+        """Format kwargs before printing them.
+
+        Resulting dictionary has to have keys necessary for str.format call
+        on fmt class variable.
+        """
+        fmtargs = {}
+        for kw, data in kwargs.items():
+            if isinstance(data, (list, set)):
+                # convert list of <someobj> to list of str(<someobj>)
+                fmtargs[kw] = list(map(str, data))
+                if len(fmtargs[kw]) == 1:
+                    # remove list brackets [] from single-item lists
+                    fmtargs[kw] = fmtargs[kw].pop()
+            else:
+                fmtargs[kw] = data
+        return fmtargs
+
+    def __str__(self):
+        if self.kwargs and self.fmt:
+            # provide custom message constructed from keyword arguments
+            fmtargs = self._fmt_kwargs(**self.kwargs)
+            return self.fmt.format(**fmtargs)
+        else:
+            # print *args directly in the same way as old DNSException
+            return super().__str__()
+
+
+class FormError(DNSException):
+    """DNS message is malformed."""
+
+
+class SyntaxError(DNSException):
+    """Text input is malformed."""
+
+
+class UnexpectedEnd(SyntaxError):
+    """Text input ended unexpectedly."""
+
+
+class TooBig(DNSException):
+    """The DNS message is too big."""
+
+
+class Timeout(DNSException):
+    """The DNS operation timed out."""
+
+    supp_kwargs = {"timeout"}
+    fmt = "The DNS operation timed out after {timeout:.3f} seconds"
+
+    # We do this as otherwise mypy complains about unexpected keyword argument
+    # idna_exception
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+
+
+class UnsupportedAlgorithm(DNSException):
+    """The DNSSEC algorithm is not supported."""
+
+
+class AlgorithmKeyMismatch(UnsupportedAlgorithm):
+    """The DNSSEC algorithm is not supported for the given key type."""
+
+
+class ValidationFailure(DNSException):
+    """The DNSSEC signature is invalid."""
+
+
+class DeniedByPolicy(DNSException):
+    """Denied by DNSSEC policy."""
+
+
+class ExceptionWrapper:
+    def __init__(self, exception_class):
+        self.exception_class = exception_class
+
+    def __enter__(self):
+        return self
+
+    def __exit__(self, exc_type, exc_val, exc_tb):
+        if exc_type is not None and not isinstance(exc_val, self.exception_class):
+            raise self.exception_class(str(exc_val)) from exc_val
+        return False