Quelle dns.py Sprache: Python

"""
    pygments.lexers.dns
    ~~~~~~~~~~~~~~~~~~~

    Pygments lexers for DNS

    :copyright: Copyright 2006-2024 by the Pygments team, see AUTHORS.
    :license: BSD, see LICENSE for details.
"""

import re

from pygments.token import Comment, Operator, Keyword, Name, String, \
    Number, Punctuation, Whitespace, Literal
from pygments.lexer import RegexLexer, bygroups, include

__all__ = ['DnsZoneLexer']

CLASSES = [
    "IN",
    "CS",
    "CH",
    "HS",
]

CLASSES_RE = "(" + "|".join(CLASSES) + ')'

class DnsZoneLexer(RegexLexer):

    """
    Lexer for DNS zone file
    """

    flags = re.MULTILINE

    name = 'Zone'
    aliases = ['zone']
    filenames = [ "*.zone" ]
    url = "https://datatracker.ietf.org/doc/html/rfc1035"
    mimetypes = ['text/dns']
    version_added = '2.16'

    tokens = {
       'root': [
            # Empty/comment line:
            (r'([ \t]*)(;.*)(\n)', bygroups(Whitespace, Comment.Single, Whitespace)),
            # Special directives:
            (r'^\$ORIGIN\b', Keyword, 'values'),
            (r'^\$TTL\b', Keyword, 'values'),
            (r'^\$INCLUDE\b', Comment.Preproc, 'include'),
            # TODO, $GENERATE https://bind9.readthedocs.io/en/v9.18.14/chapter3.html#soa-rr
            (r'^\$[A-Z]+\b', Keyword, 'values'),
            # Records:
            # <domain-name> [<TTL>] [<class>] <type> <RDATA> [<comment>]
            (r'^(@)([ \t]+)(?:([0-9]+[smhdw]?)([ \t]+))?(?:' + CLASSES_RE + "([ \t]+))?([A-Z]+)([ \t]+)",
                bygroups(Operator, Whitespace, Number.Integer, Whitespace, Name.Class, Whitespace, Keyword.Type, Whitespace),
                "values"),
            (r'^([^ \t\n]*)([ \t]+)(?:([0-9]+[smhdw]?)([ \t]+))?(?:' + CLASSES_RE + "([ \t]+))?([A-Z]+)([ \t]+)",
                bygroups(Name, Whitespace, Number.Integer, Whitespace, Name.Class, Whitespace, Keyword.Type, Whitespace),
                "values"),
            # <domain-name> [<class>] [<TTL>] <type> <RDATA> [<comment>]
            (r'^(Operator)([ \t]+)(?:' + CLASSES_RE + "([ \t]+))?(?:([0-9]+[smhdw]?)([ \t]+))?([A-Z]+)([ \t]+)",
                bygroups(Name, Whitespace, Number.Integer, Whitespace, Name.Class, Whitespace, Keyword.Type, Whitespace),
                "values"),
            (r'^([^ \t\n]*)([ \t]+)(?:' + CLASSES_RE + "([ \t]+))?(?:([0-9]+[smhdw]?)([ \t]+))?([A-Z]+)([ \t]+)",
                bygroups(Name, Whitespace, Number.Integer, Whitespace, Name.Class, Whitespace, Keyword.Type, Whitespace),
                "values"),
        ],
        # Parsing values:
        'values': [
            (r'\n', Whitespace, "#pop"),
            (r'$', Punctuation, 'nested'),
            include('simple-value'),
        ],
        # Parsing nested values (...):
        'nested': [
            (r'$', Punctuation, "#pop"),
            include('multiple-simple-values'),
        ],
        # Parsing values:
        'simple-value': [
            (r'(;.*)', bygroups(Comment.Single)),
            (r'[ \t]+', Whitespace),
            (r"@\b", Operator),
            ('"', String, 'string'),
            (r'[0-9]+[smhdw]?$', Number.Integer),
            (r'([0-9]+[smhdw]?)([ \t]+)', bygroups(Number.Integer, Whitespace)),
            (r'\S+', Literal),
        ],
        'multiple-simple-values': [
            include('simple-value'),
            (r'[\n]+', Whitespace),
        ],
        'include': [
            (r'([ \t]+)([^ \t\n]+)([ \t]+)([-\._a-zA-Z]+)([ \t]+)(;.*)?$',
             bygroups(Whitespace, Comment.PreprocFile, Whitespace, Name, Whitespace, Comment.Single), '#pop'),
            (r'([ \t]+)([^ \t\n]+)([ \t\n]+)$', bygroups(Whitespace, Comment.PreprocFile, Whitespace), '#pop'),
        ],
        "string": [
            (r'\\"', String),
            (r'"', String, "#pop"),
            (r'[^"]+', String),
        ]
    }

    def analyse_text(text):
        return text.startswith("$ORIGIN")

quality57%

¤ Dauer der Verarbeitung: 0.15 Sekunden (vorverarbeitet) ¤

Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.

Bemerkung:

Die farbliche Syntaxdarstellung ist noch experimentell.