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
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
|
import six
from six.moves import urllib
from netlib import utils
# PY2 workaround
def decode_parse_result(result, enc):
if hasattr(result, "decode"):
return result.decode(enc)
else:
return urllib.parse.ParseResult(*[x.decode(enc) for x in result])
# PY2 workaround
def encode_parse_result(result, enc):
if hasattr(result, "encode"):
return result.encode(enc)
else:
return urllib.parse.ParseResult(*[x.encode(enc) for x in result])
def parse(url):
"""
URL-parsing function that checks that
- port is an integer 0-65535
- host is a valid IDNA-encoded hostname with no null-bytes
- path is valid ASCII
Args:
A URL (as bytes or as unicode)
Returns:
A (scheme, host, port, path) tuple
Raises:
ValueError, if the URL is not properly formatted.
"""
parsed = urllib.parse.urlparse(url)
if not parsed.hostname:
raise ValueError("No hostname given")
if isinstance(url, six.binary_type):
host = parsed.hostname
# this should not raise a ValueError,
# but we try to be very forgiving here and accept just everything.
# decode_parse_result(parsed, "ascii")
else:
host = parsed.hostname.encode("idna")
parsed = encode_parse_result(parsed, "ascii")
port = parsed.port
if not port:
port = 443 if parsed.scheme == b"https" else 80
full_path = urllib.parse.urlunparse(
(b"", b"", parsed.path, parsed.params, parsed.query, parsed.fragment)
)
if not full_path.startswith(b"/"):
full_path = b"/" + full_path
if not utils.is_valid_host(host):
raise ValueError("Invalid Host")
if not utils.is_valid_port(port):
raise ValueError("Invalid Port")
return parsed.scheme, host, port, full_path
def unparse(scheme, host, port, path=""):
"""
Returns a URL string, constructed from the specified components.
Args:
All args must be str.
"""
if path == "*":
path = ""
return "%s://%s%s" % (scheme, utils.hostport(scheme, host, port), path)
def encode(s):
"""
Takes a list of (key, value) tuples and returns a urlencoded string.
"""
s = [tuple(i) for i in s]
return urllib.parse.urlencode(s, False)
def decode(s):
"""
Takes a urlencoded string and returns a list of (key, value) tuples.
"""
return urllib.parse.parse_qsl(s, keep_blank_values=True)
|
