721 lines
21 KiB
Python
721 lines
21 KiB
Python
# -*- coding: utf-8 -*-
|
|
|
|
"""
|
|
requests.utils
|
|
~~~~~~~~~~~~~~
|
|
|
|
This module provides utility functions that are used within Requests
|
|
that are also useful for external consumption.
|
|
|
|
"""
|
|
|
|
import cgi
|
|
import codecs
|
|
import collections
|
|
import io
|
|
import os
|
|
import platform
|
|
import re
|
|
import sys
|
|
import socket
|
|
import struct
|
|
import warnings
|
|
|
|
from . import __version__
|
|
from . import certs
|
|
from .compat import parse_http_list as _parse_list_header
|
|
from .compat import (quote, urlparse, bytes, str, OrderedDict, unquote, is_py2,
|
|
builtin_str, getproxies, proxy_bypass, urlunparse,
|
|
basestring)
|
|
from .cookies import RequestsCookieJar, cookiejar_from_dict
|
|
from .structures import CaseInsensitiveDict
|
|
from .exceptions import InvalidURL, FileModeWarning
|
|
|
|
_hush_pyflakes = (RequestsCookieJar,)
|
|
|
|
NETRC_FILES = ('.netrc', '_netrc')
|
|
|
|
DEFAULT_CA_BUNDLE_PATH = certs.where()
|
|
|
|
|
|
def dict_to_sequence(d):
|
|
"""Returns an internal sequence dictionary update."""
|
|
|
|
if hasattr(d, 'items'):
|
|
d = d.items()
|
|
|
|
return d
|
|
|
|
|
|
def super_len(o):
|
|
total_length = 0
|
|
current_position = 0
|
|
|
|
if hasattr(o, '__len__'):
|
|
total_length = len(o)
|
|
|
|
elif hasattr(o, 'len'):
|
|
total_length = o.len
|
|
|
|
elif hasattr(o, 'getvalue'):
|
|
# e.g. BytesIO, cStringIO.StringIO
|
|
total_length = len(o.getvalue())
|
|
|
|
elif hasattr(o, 'fileno'):
|
|
try:
|
|
fileno = o.fileno()
|
|
except io.UnsupportedOperation:
|
|
pass
|
|
else:
|
|
total_length = os.fstat(fileno).st_size
|
|
|
|
# Having used fstat to determine the file length, we need to
|
|
# confirm that this file was opened up in binary mode.
|
|
if 'b' not in o.mode:
|
|
warnings.warn((
|
|
"Requests has determined the content-length for this "
|
|
"request using the binary size of the file: however, the "
|
|
"file has been opened in text mode (i.e. without the 'b' "
|
|
"flag in the mode). This may lead to an incorrect "
|
|
"content-length. In Requests 3.0, support will be removed "
|
|
"for files in text mode."),
|
|
FileModeWarning
|
|
)
|
|
|
|
if hasattr(o, 'tell'):
|
|
current_position = o.tell()
|
|
|
|
return max(0, total_length - current_position)
|
|
|
|
|
|
def get_netrc_auth(url, raise_errors=False):
|
|
"""Returns the Requests tuple auth for a given url from netrc."""
|
|
|
|
try:
|
|
from netrc import netrc, NetrcParseError
|
|
|
|
netrc_path = None
|
|
|
|
for f in NETRC_FILES:
|
|
try:
|
|
loc = os.path.expanduser('~/{0}'.format(f))
|
|
except KeyError:
|
|
# os.path.expanduser can fail when $HOME is undefined and
|
|
# getpwuid fails. See http://bugs.python.org/issue20164 &
|
|
# https://github.com/kennethreitz/requests/issues/1846
|
|
return
|
|
|
|
if os.path.exists(loc):
|
|
netrc_path = loc
|
|
break
|
|
|
|
# Abort early if there isn't one.
|
|
if netrc_path is None:
|
|
return
|
|
|
|
ri = urlparse(url)
|
|
|
|
# Strip port numbers from netloc. This weird `if...encode`` dance is
|
|
# used for Python 3.2, which doesn't support unicode literals.
|
|
splitstr = b':'
|
|
if isinstance(url, str):
|
|
splitstr = splitstr.decode('ascii')
|
|
host = ri.netloc.split(splitstr)[0]
|
|
|
|
try:
|
|
_netrc = netrc(netrc_path).authenticators(host)
|
|
if _netrc:
|
|
# Return with login / password
|
|
login_i = (0 if _netrc[0] else 1)
|
|
return (_netrc[login_i], _netrc[2])
|
|
except (NetrcParseError, IOError):
|
|
# If there was a parsing error or a permissions issue reading the file,
|
|
# we'll just skip netrc auth unless explicitly asked to raise errors.
|
|
if raise_errors:
|
|
raise
|
|
|
|
# AppEngine hackiness.
|
|
except (ImportError, AttributeError):
|
|
pass
|
|
|
|
|
|
def guess_filename(obj):
|
|
"""Tries to guess the filename of the given object."""
|
|
name = getattr(obj, 'name', None)
|
|
if (name and isinstance(name, basestring) and name[0] != '<' and
|
|
name[-1] != '>'):
|
|
return os.path.basename(name)
|
|
|
|
|
|
def from_key_val_list(value):
|
|
"""Take an object and test to see if it can be represented as a
|
|
dictionary. Unless it can not be represented as such, return an
|
|
OrderedDict, e.g.,
|
|
|
|
::
|
|
|
|
>>> from_key_val_list([('key', 'val')])
|
|
OrderedDict([('key', 'val')])
|
|
>>> from_key_val_list('string')
|
|
ValueError: need more than 1 value to unpack
|
|
>>> from_key_val_list({'key': 'val'})
|
|
OrderedDict([('key', 'val')])
|
|
"""
|
|
if value is None:
|
|
return None
|
|
|
|
if isinstance(value, (str, bytes, bool, int)):
|
|
raise ValueError('cannot encode objects that are not 2-tuples')
|
|
|
|
return OrderedDict(value)
|
|
|
|
|
|
def to_key_val_list(value):
|
|
"""Take an object and test to see if it can be represented as a
|
|
dictionary. If it can be, return a list of tuples, e.g.,
|
|
|
|
::
|
|
|
|
>>> to_key_val_list([('key', 'val')])
|
|
[('key', 'val')]
|
|
>>> to_key_val_list({'key': 'val'})
|
|
[('key', 'val')]
|
|
>>> to_key_val_list('string')
|
|
ValueError: cannot encode objects that are not 2-tuples.
|
|
"""
|
|
if value is None:
|
|
return None
|
|
|
|
if isinstance(value, (str, bytes, bool, int)):
|
|
raise ValueError('cannot encode objects that are not 2-tuples')
|
|
|
|
if isinstance(value, collections.Mapping):
|
|
value = value.items()
|
|
|
|
return list(value)
|
|
|
|
|
|
# From mitsuhiko/werkzeug (used with permission).
|
|
def parse_list_header(value):
|
|
"""Parse lists as described by RFC 2068 Section 2.
|
|
|
|
In particular, parse comma-separated lists where the elements of
|
|
the list may include quoted-strings. A quoted-string could
|
|
contain a comma. A non-quoted string could have quotes in the
|
|
middle. Quotes are removed automatically after parsing.
|
|
|
|
It basically works like :func:`parse_set_header` just that items
|
|
may appear multiple times and case sensitivity is preserved.
|
|
|
|
The return value is a standard :class:`list`:
|
|
|
|
>>> parse_list_header('token, "quoted value"')
|
|
['token', 'quoted value']
|
|
|
|
To create a header from the :class:`list` again, use the
|
|
:func:`dump_header` function.
|
|
|
|
:param value: a string with a list header.
|
|
:return: :class:`list`
|
|
"""
|
|
result = []
|
|
for item in _parse_list_header(value):
|
|
if item[:1] == item[-1:] == '"':
|
|
item = unquote_header_value(item[1:-1])
|
|
result.append(item)
|
|
return result
|
|
|
|
|
|
# From mitsuhiko/werkzeug (used with permission).
|
|
def parse_dict_header(value):
|
|
"""Parse lists of key, value pairs as described by RFC 2068 Section 2 and
|
|
convert them into a python dict:
|
|
|
|
>>> d = parse_dict_header('foo="is a fish", bar="as well"')
|
|
>>> type(d) is dict
|
|
True
|
|
>>> sorted(d.items())
|
|
[('bar', 'as well'), ('foo', 'is a fish')]
|
|
|
|
If there is no value for a key it will be `None`:
|
|
|
|
>>> parse_dict_header('key_without_value')
|
|
{'key_without_value': None}
|
|
|
|
To create a header from the :class:`dict` again, use the
|
|
:func:`dump_header` function.
|
|
|
|
:param value: a string with a dict header.
|
|
:return: :class:`dict`
|
|
"""
|
|
result = {}
|
|
for item in _parse_list_header(value):
|
|
if '=' not in item:
|
|
result[item] = None
|
|
continue
|
|
name, value = item.split('=', 1)
|
|
if value[:1] == value[-1:] == '"':
|
|
value = unquote_header_value(value[1:-1])
|
|
result[name] = value
|
|
return result
|
|
|
|
|
|
# From mitsuhiko/werkzeug (used with permission).
|
|
def unquote_header_value(value, is_filename=False):
|
|
r"""Unquotes a header value. (Reversal of :func:`quote_header_value`).
|
|
This does not use the real unquoting but what browsers are actually
|
|
using for quoting.
|
|
|
|
:param value: the header value to unquote.
|
|
"""
|
|
if value and value[0] == value[-1] == '"':
|
|
# this is not the real unquoting, but fixing this so that the
|
|
# RFC is met will result in bugs with internet explorer and
|
|
# probably some other browsers as well. IE for example is
|
|
# uploading files with "C:\foo\bar.txt" as filename
|
|
value = value[1:-1]
|
|
|
|
# if this is a filename and the starting characters look like
|
|
# a UNC path, then just return the value without quotes. Using the
|
|
# replace sequence below on a UNC path has the effect of turning
|
|
# the leading double slash into a single slash and then
|
|
# _fix_ie_filename() doesn't work correctly. See #458.
|
|
if not is_filename or value[:2] != '\\\\':
|
|
return value.replace('\\\\', '\\').replace('\\"', '"')
|
|
return value
|
|
|
|
|
|
def dict_from_cookiejar(cj):
|
|
"""Returns a key/value dictionary from a CookieJar.
|
|
|
|
:param cj: CookieJar object to extract cookies from.
|
|
"""
|
|
|
|
cookie_dict = {}
|
|
|
|
for cookie in cj:
|
|
cookie_dict[cookie.name] = cookie.value
|
|
|
|
return cookie_dict
|
|
|
|
|
|
def add_dict_to_cookiejar(cj, cookie_dict):
|
|
"""Returns a CookieJar from a key/value dictionary.
|
|
|
|
:param cj: CookieJar to insert cookies into.
|
|
:param cookie_dict: Dict of key/values to insert into CookieJar.
|
|
"""
|
|
|
|
cj2 = cookiejar_from_dict(cookie_dict)
|
|
cj.update(cj2)
|
|
return cj
|
|
|
|
|
|
def get_encodings_from_content(content):
|
|
"""Returns encodings from given content string.
|
|
|
|
:param content: bytestring to extract encodings from.
|
|
"""
|
|
warnings.warn((
|
|
'In requests 3.0, get_encodings_from_content will be removed. For '
|
|
'more information, please see the discussion on issue #2266. (This'
|
|
' warning should only appear once.)'),
|
|
DeprecationWarning)
|
|
|
|
charset_re = re.compile(r'<meta.*?charset=["\']*(.+?)["\'>]', flags=re.I)
|
|
pragma_re = re.compile(r'<meta.*?content=["\']*;?charset=(.+?)["\'>]', flags=re.I)
|
|
xml_re = re.compile(r'^<\?xml.*?encoding=["\']*(.+?)["\'>]')
|
|
|
|
return (charset_re.findall(content) +
|
|
pragma_re.findall(content) +
|
|
xml_re.findall(content))
|
|
|
|
|
|
def get_encoding_from_headers(headers):
|
|
"""Returns encodings from given HTTP Header Dict.
|
|
|
|
:param headers: dictionary to extract encoding from.
|
|
"""
|
|
|
|
content_type = headers.get('content-type')
|
|
|
|
if not content_type:
|
|
return None
|
|
|
|
content_type, params = cgi.parse_header(content_type)
|
|
|
|
if 'charset' in params:
|
|
return params['charset'].strip("'\"")
|
|
|
|
if 'text' in content_type:
|
|
return 'ISO-8859-1'
|
|
|
|
|
|
def stream_decode_response_unicode(iterator, r):
|
|
"""Stream decodes a iterator."""
|
|
|
|
if r.encoding is None:
|
|
for item in iterator:
|
|
yield item
|
|
return
|
|
|
|
decoder = codecs.getincrementaldecoder(r.encoding)(errors='replace')
|
|
for chunk in iterator:
|
|
rv = decoder.decode(chunk)
|
|
if rv:
|
|
yield rv
|
|
rv = decoder.decode(b'', final=True)
|
|
if rv:
|
|
yield rv
|
|
|
|
|
|
def iter_slices(string, slice_length):
|
|
"""Iterate over slices of a string."""
|
|
pos = 0
|
|
while pos < len(string):
|
|
yield string[pos:pos + slice_length]
|
|
pos += slice_length
|
|
|
|
|
|
def get_unicode_from_response(r):
|
|
"""Returns the requested content back in unicode.
|
|
|
|
:param r: Response object to get unicode content from.
|
|
|
|
Tried:
|
|
|
|
1. charset from content-type
|
|
2. fall back and replace all unicode characters
|
|
|
|
"""
|
|
warnings.warn((
|
|
'In requests 3.0, get_unicode_from_response will be removed. For '
|
|
'more information, please see the discussion on issue #2266. (This'
|
|
' warning should only appear once.)'),
|
|
DeprecationWarning)
|
|
|
|
tried_encodings = []
|
|
|
|
# Try charset from content-type
|
|
encoding = get_encoding_from_headers(r.headers)
|
|
|
|
if encoding:
|
|
try:
|
|
return str(r.content, encoding)
|
|
except UnicodeError:
|
|
tried_encodings.append(encoding)
|
|
|
|
# Fall back:
|
|
try:
|
|
return str(r.content, encoding, errors='replace')
|
|
except TypeError:
|
|
return r.content
|
|
|
|
|
|
# The unreserved URI characters (RFC 3986)
|
|
UNRESERVED_SET = frozenset(
|
|
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
|
|
+ "0123456789-._~")
|
|
|
|
|
|
def unquote_unreserved(uri):
|
|
"""Un-escape any percent-escape sequences in a URI that are unreserved
|
|
characters. This leaves all reserved, illegal and non-ASCII bytes encoded.
|
|
"""
|
|
parts = uri.split('%')
|
|
for i in range(1, len(parts)):
|
|
h = parts[i][0:2]
|
|
if len(h) == 2 and h.isalnum():
|
|
try:
|
|
c = chr(int(h, 16))
|
|
except ValueError:
|
|
raise InvalidURL("Invalid percent-escape sequence: '%s'" % h)
|
|
|
|
if c in UNRESERVED_SET:
|
|
parts[i] = c + parts[i][2:]
|
|
else:
|
|
parts[i] = '%' + parts[i]
|
|
else:
|
|
parts[i] = '%' + parts[i]
|
|
return ''.join(parts)
|
|
|
|
|
|
def requote_uri(uri):
|
|
"""Re-quote the given URI.
|
|
|
|
This function passes the given URI through an unquote/quote cycle to
|
|
ensure that it is fully and consistently quoted.
|
|
"""
|
|
safe_with_percent = "!#$%&'()*+,/:;=?@[]~"
|
|
safe_without_percent = "!#$&'()*+,/:;=?@[]~"
|
|
try:
|
|
# Unquote only the unreserved characters
|
|
# Then quote only illegal characters (do not quote reserved,
|
|
# unreserved, or '%')
|
|
return quote(unquote_unreserved(uri), safe=safe_with_percent)
|
|
except InvalidURL:
|
|
# We couldn't unquote the given URI, so let's try quoting it, but
|
|
# there may be unquoted '%'s in the URI. We need to make sure they're
|
|
# properly quoted so they do not cause issues elsewhere.
|
|
return quote(uri, safe=safe_without_percent)
|
|
|
|
|
|
def address_in_network(ip, net):
|
|
"""
|
|
This function allows you to check if on IP belongs to a network subnet
|
|
Example: returns True if ip = 192.168.1.1 and net = 192.168.1.0/24
|
|
returns False if ip = 192.168.1.1 and net = 192.168.100.0/24
|
|
"""
|
|
ipaddr = struct.unpack('=L', socket.inet_aton(ip))[0]
|
|
netaddr, bits = net.split('/')
|
|
netmask = struct.unpack('=L', socket.inet_aton(dotted_netmask(int(bits))))[0]
|
|
network = struct.unpack('=L', socket.inet_aton(netaddr))[0] & netmask
|
|
return (ipaddr & netmask) == (network & netmask)
|
|
|
|
|
|
def dotted_netmask(mask):
|
|
"""
|
|
Converts mask from /xx format to xxx.xxx.xxx.xxx
|
|
Example: if mask is 24 function returns 255.255.255.0
|
|
"""
|
|
bits = 0xffffffff ^ (1 << 32 - mask) - 1
|
|
return socket.inet_ntoa(struct.pack('>I', bits))
|
|
|
|
|
|
def is_ipv4_address(string_ip):
|
|
try:
|
|
socket.inet_aton(string_ip)
|
|
except socket.error:
|
|
return False
|
|
return True
|
|
|
|
|
|
def is_valid_cidr(string_network):
|
|
"""Very simple check of the cidr format in no_proxy variable"""
|
|
if string_network.count('/') == 1:
|
|
try:
|
|
mask = int(string_network.split('/')[1])
|
|
except ValueError:
|
|
return False
|
|
|
|
if mask < 1 or mask > 32:
|
|
return False
|
|
|
|
try:
|
|
socket.inet_aton(string_network.split('/')[0])
|
|
except socket.error:
|
|
return False
|
|
else:
|
|
return False
|
|
return True
|
|
|
|
|
|
def should_bypass_proxies(url):
|
|
"""
|
|
Returns whether we should bypass proxies or not.
|
|
"""
|
|
get_proxy = lambda k: os.environ.get(k) or os.environ.get(k.upper())
|
|
|
|
# First check whether no_proxy is defined. If it is, check that the URL
|
|
# we're getting isn't in the no_proxy list.
|
|
no_proxy = get_proxy('no_proxy')
|
|
netloc = urlparse(url).netloc
|
|
|
|
if no_proxy:
|
|
# We need to check whether we match here. We need to see if we match
|
|
# the end of the netloc, both with and without the port.
|
|
no_proxy = (
|
|
host for host in no_proxy.replace(' ', '').split(',') if host
|
|
)
|
|
|
|
ip = netloc.split(':')[0]
|
|
if is_ipv4_address(ip):
|
|
for proxy_ip in no_proxy:
|
|
if is_valid_cidr(proxy_ip):
|
|
if address_in_network(ip, proxy_ip):
|
|
return True
|
|
else:
|
|
for host in no_proxy:
|
|
if netloc.endswith(host) or netloc.split(':')[0].endswith(host):
|
|
# The URL does match something in no_proxy, so we don't want
|
|
# to apply the proxies on this URL.
|
|
return True
|
|
|
|
# If the system proxy settings indicate that this URL should be bypassed,
|
|
# don't proxy.
|
|
# The proxy_bypass function is incredibly buggy on OS X in early versions
|
|
# of Python 2.6, so allow this call to fail. Only catch the specific
|
|
# exceptions we've seen, though: this call failing in other ways can reveal
|
|
# legitimate problems.
|
|
try:
|
|
bypass = proxy_bypass(netloc)
|
|
except (TypeError, socket.gaierror):
|
|
bypass = False
|
|
|
|
if bypass:
|
|
return True
|
|
|
|
return False
|
|
|
|
def get_environ_proxies(url):
|
|
"""Return a dict of environment proxies."""
|
|
if should_bypass_proxies(url):
|
|
return {}
|
|
else:
|
|
return getproxies()
|
|
|
|
def select_proxy(url, proxies):
|
|
"""Select a proxy for the url, if applicable.
|
|
|
|
:param url: The url being for the request
|
|
:param proxies: A dictionary of schemes or schemes and hosts to proxy URLs
|
|
"""
|
|
proxies = proxies or {}
|
|
urlparts = urlparse(url)
|
|
proxy = proxies.get(urlparts.scheme+'://'+urlparts.hostname)
|
|
if proxy is None:
|
|
proxy = proxies.get(urlparts.scheme)
|
|
return proxy
|
|
|
|
def default_user_agent(name="python-requests"):
|
|
"""Return a string representing the default user agent."""
|
|
return '%s/%s' % (name, __version__)
|
|
|
|
|
|
def default_headers():
|
|
return CaseInsensitiveDict({
|
|
'User-Agent': default_user_agent(),
|
|
'Accept-Encoding': ', '.join(('gzip', 'deflate')),
|
|
'Accept': '*/*',
|
|
'Connection': 'keep-alive',
|
|
})
|
|
|
|
|
|
def parse_header_links(value):
|
|
"""Return a dict of parsed link headers proxies.
|
|
|
|
i.e. Link: <http:/.../front.jpeg>; rel=front; type="image/jpeg",<http://.../back.jpeg>; rel=back;type="image/jpeg"
|
|
|
|
"""
|
|
|
|
links = []
|
|
|
|
replace_chars = " '\""
|
|
|
|
for val in re.split(", *<", value):
|
|
try:
|
|
url, params = val.split(";", 1)
|
|
except ValueError:
|
|
url, params = val, ''
|
|
|
|
link = {}
|
|
|
|
link["url"] = url.strip("<> '\"")
|
|
|
|
for param in params.split(";"):
|
|
try:
|
|
key, value = param.split("=")
|
|
except ValueError:
|
|
break
|
|
|
|
link[key.strip(replace_chars)] = value.strip(replace_chars)
|
|
|
|
links.append(link)
|
|
|
|
return links
|
|
|
|
|
|
# Null bytes; no need to recreate these on each call to guess_json_utf
|
|
_null = '\x00'.encode('ascii') # encoding to ASCII for Python 3
|
|
_null2 = _null * 2
|
|
_null3 = _null * 3
|
|
|
|
|
|
def guess_json_utf(data):
|
|
# JSON always starts with two ASCII characters, so detection is as
|
|
# easy as counting the nulls and from their location and count
|
|
# determine the encoding. Also detect a BOM, if present.
|
|
sample = data[:4]
|
|
if sample in (codecs.BOM_UTF32_LE, codecs.BOM32_BE):
|
|
return 'utf-32' # BOM included
|
|
if sample[:3] == codecs.BOM_UTF8:
|
|
return 'utf-8-sig' # BOM included, MS style (discouraged)
|
|
if sample[:2] in (codecs.BOM_UTF16_LE, codecs.BOM_UTF16_BE):
|
|
return 'utf-16' # BOM included
|
|
nullcount = sample.count(_null)
|
|
if nullcount == 0:
|
|
return 'utf-8'
|
|
if nullcount == 2:
|
|
if sample[::2] == _null2: # 1st and 3rd are null
|
|
return 'utf-16-be'
|
|
if sample[1::2] == _null2: # 2nd and 4th are null
|
|
return 'utf-16-le'
|
|
# Did not detect 2 valid UTF-16 ascii-range characters
|
|
if nullcount == 3:
|
|
if sample[:3] == _null3:
|
|
return 'utf-32-be'
|
|
if sample[1:] == _null3:
|
|
return 'utf-32-le'
|
|
# Did not detect a valid UTF-32 ascii-range character
|
|
return None
|
|
|
|
|
|
def prepend_scheme_if_needed(url, new_scheme):
|
|
'''Given a URL that may or may not have a scheme, prepend the given scheme.
|
|
Does not replace a present scheme with the one provided as an argument.'''
|
|
scheme, netloc, path, params, query, fragment = urlparse(url, new_scheme)
|
|
|
|
# urlparse is a finicky beast, and sometimes decides that there isn't a
|
|
# netloc present. Assume that it's being over-cautious, and switch netloc
|
|
# and path if urlparse decided there was no netloc.
|
|
if not netloc:
|
|
netloc, path = path, netloc
|
|
|
|
return urlunparse((scheme, netloc, path, params, query, fragment))
|
|
|
|
|
|
def get_auth_from_url(url):
|
|
"""Given a url with authentication components, extract them into a tuple of
|
|
username,password."""
|
|
parsed = urlparse(url)
|
|
|
|
try:
|
|
auth = (unquote(parsed.username), unquote(parsed.password))
|
|
except (AttributeError, TypeError):
|
|
auth = ('', '')
|
|
|
|
return auth
|
|
|
|
|
|
def to_native_string(string, encoding='ascii'):
|
|
"""
|
|
Given a string object, regardless of type, returns a representation of that
|
|
string in the native string type, encoding and decoding where necessary.
|
|
This assumes ASCII unless told otherwise.
|
|
"""
|
|
out = None
|
|
|
|
if isinstance(string, builtin_str):
|
|
out = string
|
|
else:
|
|
if is_py2:
|
|
out = string.encode(encoding)
|
|
else:
|
|
out = string.decode(encoding)
|
|
|
|
return out
|
|
|
|
|
|
def urldefragauth(url):
|
|
"""
|
|
Given a url remove the fragment and the authentication part
|
|
"""
|
|
scheme, netloc, path, params, query, fragment = urlparse(url)
|
|
|
|
# see func:`prepend_scheme_if_needed`
|
|
if not netloc:
|
|
netloc, path = path, netloc
|
|
|
|
netloc = netloc.rsplit('@', 1)[-1]
|
|
|
|
return urlunparse((scheme, netloc, path, params, query, ''))
|