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43 lines
1.3 KiB
Python
43 lines
1.3 KiB
Python
import xml.etree.ElementTree as ElementTree
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import requests
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def altlink(url, priority=None, blacklist=None):
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'''Download .meta4 metalink version4 xml file and parse it.'''
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mirrors = {}
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url = url
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try:
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m = requests.get(url + '.meta4')
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except requests.exceptions.ConnectionError:
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return
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else:
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mirror_xml = ElementTree.fromstring(m.text)
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for f in mirror_xml.iter("{urn:ietf:params:xml:ns:metalink}file"):
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for u in f.iter("{urn:ietf:params:xml:ns:metalink}url"):
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pri = u.attrib['priority']
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mirrors[pri] = u.text
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if len(mirrors) == 0:
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# no alternative
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return url
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if priority is None:
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if blacklist is not None:
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for ind in range(len(mirrors)):
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mirror = mirrors[str(ind + 1)]
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black = False
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for b in blacklist:
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if mirror.startswith(b):
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black = True
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continue
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if black:
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continue
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return mirror
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else:
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for ind in range(len(mirrors)):
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mirror = mirrors[str(ind + 1)]
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return mirror
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else:
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return mirrors[str(priority)]
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