Updated script that can be controled by Nodejs web app

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

@@ -0,0 +1,92 @@
+# 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.
+
+"""DNS TTL conversion."""
+
+from typing import Union
+
+import dns.exception
+
+# Technically TTLs are supposed to be between 0 and 2**31 - 1, with values
+# greater than that interpreted as 0, but we do not impose this policy here
+# as values > 2**31 - 1 occur in real world data.
+#
+# We leave it to applications to impose tighter bounds if desired.
+MAX_TTL = 2**32 - 1
+
+
+class BadTTL(dns.exception.SyntaxError):
+    """DNS TTL value is not well-formed."""
+
+
+def from_text(text: str) -> int:
+    """Convert the text form of a TTL to an integer.
+
+    The BIND 8 units syntax for TTLs (e.g. '1w6d4h3m10s') is supported.
+
+    *text*, a ``str``, the textual TTL.
+
+    Raises ``dns.ttl.BadTTL`` if the TTL is not well-formed.
+
+    Returns an ``int``.
+    """
+
+    if text.isdigit():
+        total = int(text)
+    elif len(text) == 0:
+        raise BadTTL
+    else:
+        total = 0
+        current = 0
+        need_digit = True
+        for c in text:
+            if c.isdigit():
+                current *= 10
+                current += int(c)
+                need_digit = False
+            else:
+                if need_digit:
+                    raise BadTTL
+                c = c.lower()
+                if c == "w":
+                    total += current * 604800
+                elif c == "d":
+                    total += current * 86400
+                elif c == "h":
+                    total += current * 3600
+                elif c == "m":
+                    total += current * 60
+                elif c == "s":
+                    total += current
+                else:
+                    raise BadTTL(f"unknown unit '{c}'")
+                current = 0
+                need_digit = True
+        if not current == 0:
+            raise BadTTL("trailing integer")
+    if total < 0 or total > MAX_TTL:
+        raise BadTTL("TTL should be between 0 and 2**32 - 1 (inclusive)")
+    return total
+
+
+def make(value: Union[int, str]) -> int:
+    if isinstance(value, int):
+        return value
+    elif isinstance(value, str):
+        return dns.ttl.from_text(value)
+    else:
+        raise ValueError("cannot convert value to TTL")