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# dbconv |
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|
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Convert DNS-LG "database" from YAML to different outputs. |
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|
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## Usage |
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``` |
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Usage: dbconv.py [options] |
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Print DNS-LG database |
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Options: |
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-h, --help show this help message and exit |
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-f DBNAME, --database=DBNAME |
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Path to YAML database |
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-j, --json Output in JSON format |
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-o ORIGIN, --origin=ORIGIN |
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Specify origin for DNS zone master format. (default: dns-lg) |
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-t, --text Plain-text output |
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-x, --xml XML format |
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-z, --zone master zone file format |
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``` |
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## The following formats are currently supported |
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### Plain text |
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``` |
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http://dns.bortzmeyer.org/ Stéphane Bortzmeyer |
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http://dnslg.generic-nic.net/ |
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http://dns-lg.nlnetlabs.nl/ NLnetLabs |
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``` |
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### Master zone file format |
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``` |
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; Documentation of the existing DNS-LG instances. |
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; |
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; Generated at 2013-02-02T16:31:28 |
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; |
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; This file contains a TXT RRset for inclusion into a |
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; zone master file. Each endpoint is a TXT record. |
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; |
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dns-lg IN TXT "http://dns.bortzmeyer.org/" ; Stéphane Bortzmeyer |
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IN TXT "http://dnslg.generic-nic.net/" ; |
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IN TXT "http://dns-lg.nlnetlabs.nl/" ; NLnetLabs |
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``` |
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### JSON |
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```json |
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[ |
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{ |
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"endpoint": "http://dns.bortzmeyer.org/", |
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"contact": "St\u00e9phane Bortzmeyer" |
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}, |
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{ |
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"endpoint": "http://dnslg.generic-nic.net/" |
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}, |
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] |
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``` |
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### XML |
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```xml |
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<?xml version="1.0" ?> |
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<dns-lg> |
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<!--Generated at 2013-02-02T19:03:51--> |
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<endpoint contact="Stéphane Bortzmeyer"> |
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http://dns.bortzmeyer.org/ |
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</endpoint> |
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<endpoint> |
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http://dns-lg.tetaneutral.net/ |
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</endpoint> |
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</dns-lg> |
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``` |
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#!/usr/bin/env python |
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# -*- coding: utf-8 -*- |
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# dbconv.py, Copyright (c) 2012, Jan-Piet Mens |
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# All rights reserved. |
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# |
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# Redistribution and use in source and binary forms, with or without |
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# modification, are permitted provided that the following conditions are met: |
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# |
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# 1. Redistributions of source code must retain the above copyright notice, this |
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# list of conditions and the following disclaimer. |
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# 2. Redistributions in binary form must reproduce the above copyright notice, |
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# this list of conditions and the following disclaimer in the documentation |
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# and/or other materials provided with the distribution. |
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# |
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND |
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
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# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR |
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# ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
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# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
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# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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# |
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# converts DNS-LG YAML database to sundry (ahem!) formats |
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import sys |
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import optparse |
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import yaml |
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import codecs |
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try: |
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import json |
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except ImportError: |
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import simplejson as json |
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import time |
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HAVE_XML=True |
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try: |
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import xml.etree.ElementTree as ET |
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from xml.dom import minidom |
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except ImportError: |
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HAVE_XML=False |
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DBNAME = 'dns-lg.yaml' |
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def loadf(filename): |
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try: |
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f = codecs.open(filename, 'r', 'utf-8') |
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try: |
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doc = yaml.load(f.read()) |
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except: |
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print "Can't parse YAML in %s" % (filename) |
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sys.exit(1) |
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f.close() |
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return doc |
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except IOError, e: |
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sys.stderr.write("Can't open file %s: %s\n" % (filename, e)) |
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sys.exit(1) |
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def dns_txt(db, origin="dns-lg"): |
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''' Print in DNS master zone file format for inclusion into zone ''' |
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print "; Documentation of the existing DNS-LG instances." |
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print ";" |
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print "; Generated at %s" % (time.strftime("%Y-%m-%dT%H:%M:%S", time.localtime())) |
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print ";" |
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print "; This file contains a TXT RRset for inclusion into a" |
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print "; zone master file. Each endpoint is a TXT record." |
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print ";" |
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for ep in db: |
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if 'endpoint' in ep: |
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txt = "\"%s\"" % (ep['endpoint']) |
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print "%-10s IN TXT %-45s ; %s" % (origin, txt, ep.get('contact', '')) |
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origin = '' # on continuation line |
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def plain_txt(db): |
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''' Print database as plain text ''' |
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for ep in db: |
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if 'endpoint' in ep: |
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print "%-50s %s" % (ep['endpoint'], ep.get('contact', '')) |
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def prettyprint(elem): |
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''' Compliments of http://www.doughellmann.com/PyMOTW/xml/etree/ElementTree/create.html ''' |
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str = ET.tostring(elem, 'utf-8') |
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newstr = minidom.parseString(str) |
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return newstr.toprettyxml(indent=" ") |
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def xml_out(db): |
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root = ET.Element('dns-lg') |
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comment = ET.Comment('Generated at %s' % (time.strftime("%Y-%m-%dT%H:%M:%S", time.localtime()))) |
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root.append(comment) |
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for ep in db: |
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if 'endpoint' in ep: |
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child = ET.SubElement(root, 'endpoint') |
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child.text = ep['endpoint'] |
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if 'contact' in ep: |
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child.set('contact', ep.get('contact')) |
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print prettyprint(root) |
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if __name__ == '__main__': |
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p = optparse.OptionParser( |
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usage='usage: %prog [options]', |
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description='Print DNS-LG database', |
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) |
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p.add_option("-f", "--database", |
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action="store", |
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dest="dbname", |
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default=DBNAME, |
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help="Path to YAML database") |
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p.add_option("-j", "--json", |
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action="store_true", |
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default=False, |
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dest='json', |
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help='Output in JSON format') |
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p.add_option("-o", "--origin", |
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action="store", |
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default="dns-lg", |
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dest='origin', |
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help='Specify origin for DNS zone master format. (default: dns-lg)') |
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p.add_option("-t", "--text", |
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action="store_true", |
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default=True, |
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dest='plain', |
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help='Plain-text output') |
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if HAVE_XML: |
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p.add_option("-x", "--xml", |
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action="store_true", |
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default=False, |
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dest='xml', |
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help='XML format') |
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p.add_option("-z", "--zone", |
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action="store_true", |
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default=False, |
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dest='dnszone', |
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help='master zone file format') |
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(options, args) = p.parse_args() |
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sys.stdout = codecs.getwriter('utf8')(sys.stdout) |
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db = loadf(options.dbname) |
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if options.dnszone: |
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dns_txt(db, options.origin) |
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elif options.xml: |
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xml_out(db) |
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elif options.json: |
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print json.dumps(db, indent=4) |
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else: |
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plain_txt(db) |
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@ -0,0 +1,13 @@ |
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# Documentation of the existing DNS-LG instances. |
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- endpoint: http://dns.bortzmeyer.org/ |
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contact: Stéphane Bortzmeyer |
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- endpoint: http://dnslg.generic-nic.net/ |
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- endpoint: http://dns-lg.nlnetlabs.nl/ |
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contact: NLnetLabs |
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- endpoint: http://dns-lg.tetaneutral.net/ |
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- endpoint: http://dns-lg.vs.uni-due.de/ |
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