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import socket |
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3
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from netaddr import iter_iprange |
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from netaddr.core import AddrFormatError |
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6
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7
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def is_ip(addr): |
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8
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"""Determine if a string is really an ip, or a hostname instead. |
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9
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10
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Args: |
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11
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addr (str): The ip address string to check |
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12
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13
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Returns: |
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bool: Whether or not `addr` is a valid ip. |
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15
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""" |
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16
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if '.' not in addr: |
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return False |
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18
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parts = addr.split('.') |
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19
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for part in parts: |
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try: |
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int(part) |
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22
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except ValueError: |
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return False |
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return True |
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26
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def is_hostname(addr): |
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"""Determine if a string is a hostname. |
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30
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Based on https://en.wikipedia.org/wiki |
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/Hostname#Restrictions_on_valid_hostnames |
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33
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Args: |
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addr (str): The address string to check |
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35
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36
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Returns: |
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37
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bool: Whether or not `addr` is a valid hostname. |
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""" |
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39
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if any([ |
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40
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'_' in addr, |
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41
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'.' not in addr, |
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42
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addr.endswith('-'), |
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is_ip(addr), |
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]): |
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return False |
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return True |
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48
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49
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def valid_hosts(formcls, field): |
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50
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"""Validate a list of IPs (Ipv4) or hostnames using python stdlib. |
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51
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52
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This is more robust than the WTForm version as it also considers hostnames. |
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53
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54
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Comma separated values: |
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e.g. '10.7.223.101,10.7.12.0' |
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Space separated values: |
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e.g. '10.223.101 10.7.223.102' |
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58
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Ranges: |
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59
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e.g. '10.7.223.200-10.7.224.10' |
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60
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Hostnames: |
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61
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e.g. foo.x.y.com, baz.bar.z.com |
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63
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:param formcls (object): The form class. |
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64
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:param field (str): The list of ips. |
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""" |
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data = field.data |
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67
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if ',' in data: |
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68
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ips = [ip for ip in data.split(',') if ip] |
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69
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elif ' ' in data: |
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70
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ips = [ip for ip in data.split(' ') if ip] |
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71
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elif '-' in data: |
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72
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try: |
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73
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start, end = data.split('-') |
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ips = iter_iprange(start, end) |
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75
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ips = [str(ip) for ip in list(ips)] |
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except ValueError: |
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raise ValueError( |
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'Invalid range specified. Format should be: ' |
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'XXX.XXX.XXX.XXX-XXX.XXX.XXX.XXX ' |
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80
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'(e.g. 10.7.223.200-10.7.224.10)') |
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81
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except AddrFormatError as e: |
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raise ValueError(e) |
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83
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else: |
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84
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# Just use the single ip |
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ips = [data] |
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86
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# If any fails conversion, it is invalid. |
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87
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for ip in ips: |
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88
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# Skip hostnames |
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89
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if not is_ip(ip): |
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90
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if not is_hostname(ip): |
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91
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raise ValueError('Invalid hostname: "{}"'.format(ip)) |
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92
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else: |
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93
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continue |
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94
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try: |
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95
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socket.inet_aton(ip) |
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96
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except socket.error: |
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97
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raise ValueError('Invalid IP: {}'.format(ip)) |
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98
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christabor /
flask_extras
