/usr/lib/python3/dist-packages/w3lib/http.py is in python3-w3lib 1.19.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 97 98 99 | from base64 import urlsafe_b64encode
def headers_raw_to_dict(headers_raw):
r"""
Convert raw headers (single multi-line bytestring)
to a dictionary.
For example:
>>> import w3lib.http
>>> w3lib.http.headers_raw_to_dict(b"Content-type: text/html\n\rAccept: gzip\n\n") # doctest: +SKIP
{'Content-type': ['text/html'], 'Accept': ['gzip']}
Incorrect input:
>>> w3lib.http.headers_raw_to_dict(b"Content-typt gzip\n\n")
{}
>>>
Argument is ``None`` (return ``None``):
>>> w3lib.http.headers_raw_to_dict(None)
>>>
"""
if headers_raw is None:
return None
headers = headers_raw.splitlines()
headers_tuples = [header.split(b':', 1) for header in headers]
result_dict = {}
for header_item in headers_tuples:
if not len(header_item) == 2:
continue
item_key = header_item[0].strip()
item_value = header_item[1].strip()
if item_key in result_dict:
result_dict[item_key].append(item_value)
else:
result_dict[item_key] = [item_value]
return result_dict
def headers_dict_to_raw(headers_dict):
r"""
Returns a raw HTTP headers representation of headers
For example:
>>> import w3lib.http
>>> w3lib.http.headers_dict_to_raw({b'Content-type': b'text/html', b'Accept': b'gzip'}) # doctest: +SKIP
'Content-type: text/html\\r\\nAccept: gzip'
>>>
Note that keys and values must be bytes.
Argument is ``None`` (returns ``None``):
>>> w3lib.http.headers_dict_to_raw(None)
>>>
"""
if headers_dict is None:
return None
raw_lines = []
for key, value in headers_dict.items():
if isinstance(value, bytes):
raw_lines.append(b": ".join([key, value]))
elif isinstance(value, (list, tuple)):
for v in value:
raw_lines.append(b": ".join([key, v]))
return b'\r\n'.join(raw_lines)
def basic_auth_header(username, password, encoding='ISO-8859-1'):
"""
Return an `Authorization` header field value for `HTTP Basic Access Authentication (RFC 2617)`_
>>> import w3lib.http
>>> w3lib.http.basic_auth_header('someuser', 'somepass')
'Basic c29tZXVzZXI6c29tZXBhc3M='
.. _HTTP Basic Access Authentication (RFC 2617): http://www.ietf.org/rfc/rfc2617.txt
"""
auth = "%s:%s" % (username, password)
if not isinstance(auth, bytes):
# XXX: RFC 2617 doesn't define encoding, but ISO-8859-1
# seems to be the most widely used encoding here. See also:
# http://greenbytes.de/tech/webdav/draft-ietf-httpauth-basicauth-enc-latest.html
auth = auth.encode(encoding)
return b'Basic ' + urlsafe_b64encode(auth)
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