-
Notifications
You must be signed in to change notification settings - Fork 2
/
validators.py
62 lines (58 loc) · 1.85 KB
/
validators.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
# -*- coding: utf-8 -*-
""" module for validataion of agent """
from django.core.exceptions import ValidationError
import sys
if sys.version_info > (3, 0):
from urllib.parse import urlparse
else:
from urlparse import urlparse
from netaddr import IPAddress, AddrFormatError
import socket
from shiori.core.settings import FEED_EXCLUDE_FQDN
def validate_url(value):
"""
Argument:
value: url (eg. http://example.org/rss)
Return:
True or raise exceptions
"""
hostname = urlparse(value).netloc
if ':' in hostname:
hostname = hostname.split(':')[0]
if hostname in FEED_EXCLUDE_FQDN:
raise ValidationError('%s is prohibited in FEED_EXCLUDE_FQDN.' % value)
try:
if IPAddress(hostname).is_loopback():
raise ValidationError('loopback address is prohibited.')
except AddrFormatError:
if getaddr(hostname) == []:
raise ValidationError('%s is not found.' % value)
for ipaddr in getaddr(hostname):
if IPAddress(ipaddr).is_loopback():
raise ValidationError('loopback address is prohibited.')
if getaddr(hostname) == []:
raise ValidationError('%s is not found.' % value)
return True
def getaddr(hostname):
"""
Argument:
hostname: FQDN (eg. example.org)
Return:
list of IPv4 or/and IPv6 addresses
"""
addresses = []
try:
addresses.append(socket.gethostbyname(hostname))
except TypeError as error:
print(error)
except socket.gaierror as error:
print(error)
try:
addresses.append(socket.getaddrinfo(hostname,
None,
socket.AF_INET6)[0][4][0])
except TypeError as error:
print(error)
except socket.gaierror as error:
print(error)
return addresses