Parse an IP Address: Difference between revisions
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m (→version 1: changed whitespace and some comments, simplified the program.) |
(→{{header|Python}}: added a simpler version) |
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=={{header|Python}}== |
=={{header|Python}}== |
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<lang python>from ipaddress import ip_address |
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from urllib.parse import urlparse |
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tests = [ |
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"127.0.0.1", |
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"127.0.0.1:80", |
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"::1", |
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"[::1]:80", |
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"::192.168.0.1", |
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"2605:2700:0:3::4713:93e3", |
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"[2605:2700:0:3::4713:93e3]:80" ] |
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def parse_ip_port(netloc): |
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try: |
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ip = ip_address(netloc) |
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port = None |
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except ValueError: |
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parsed = urlparse('//{}'.format(netloc)) |
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ip = ip_address(parsed.hostname) |
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port = parsed.port |
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return ip, port |
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for address in tests: |
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ip, port = parse_ip_port(address) |
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hex_ip = {4:'{:08X}', 6:'{:032X}'}[ip.version].format(int(ip)) |
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print("{:39s} {:>32s} IPv{} port={}".format( |
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str(ip), hex_ip, ip.version, port ))</lang> |
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{{out}} |
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<pre> |
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127.0.0.1 7F000001 IPv4 port=None |
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127.0.0.1 7F000001 IPv4 port=80 |
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::1 00000000000000000000000000000001 IPv6 port=None |
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::1 00000000000000000000000000000001 IPv6 port=80 |
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::c0a8:1 000000000000000000000000C0A80001 IPv6 port=None |
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2605:2700:0:3::4713:93e3 260527000000000300000000471393E3 IPv6 port=None |
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2605:2700:0:3::4713:93e3 260527000000000300000000471393E3 IPv6 port=80 |
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</pre> |
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{{libheader|pyparse}} |
{{libheader|pyparse}} |
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The following uses [http://pyparsing.wikispaces.com/ pyparse] to parse the IP address. It's an attempt at using pyparse to describe an IP address in an ''extended'' [[wp:Backus–Naur_Form|BNF syntax]]. Using a parser does seems a bit like using a sledgehammer to crack a nut. However it does make for an interesting alternative to using a [[Regular expression|regular expressions]] to parse IP addresses. Note - for example - that the parser specifically reports - as an exception - the location where the IP address is syntactically wrong. |
The following uses [http://pyparsing.wikispaces.com/ pyparse] to parse the IP address. It's an attempt at using pyparse to describe an IP address in an ''extended'' [[wp:Backus–Naur_Form|BNF syntax]]. Using a parser does seems a bit like using a sledgehammer to crack a nut. However it does make for an interesting alternative to using a [[Regular expression|regular expressions]] to parse IP addresses. Note - for example - that the parser specifically reports - as an exception - the location where the IP address is syntactically wrong. |
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