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requests.utils
~~~~~~~~~~~~~~
This module provides utility functions that are used within Requests
that are also useful for external consumption.
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c C s! t � r t | � St | � Sd S( s� Return True, if the host should be bypassed.
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c C s" t | d � r | j � } n | S( s/ Returns an internal sequence dictionary update.t items( t hasattrR5 ( t d( ( s> /usr/lib/python2.7/site-packages/pip/_vendor/requests/utils.pyt dict_to_sequence[ s c C s� d } d } t | d � r* t | � } n� t | d � rE | j } nm t | d � r� y | j � } Wn t j k
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Ni t __len__t lent filenot bs% 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.t tellt seeki ( t NoneR6 R: R; t iot UnsupportedOperationt ost fstatt st_sizet modet warningst warnR R= R' t IOErrorR> t max( t ot total_lengtht current_positionR; ( ( s> /usr/lib/python2.7/site-packages/pip/_vendor/requests/utils.pyt super_lend s@
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c C s[ t | d d � } | rW t | t � rW | d d k rW | d d k rW t j j | � Sd S( s0 Tries to guess the filename of the given object.t namei t <i����t >N( t getattrR? RX R
RB RS t basename( t objRg ( ( s> /usr/lib/python2.7/site-packages/pip/_vendor/requests/utils.pyt guess_filename� s %c C sD | d k r d St | t t t t f � r: t d � � n t | � S( s� 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')])
:rtype: OrderedDict
s+ cannot encode objects that are not 2-tuplesN( R? RX R R t boolt intt
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c C se | d k r d St | t t t t f � r: t d � � n t | t j � r[ | j � } n t
| � S( s� 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.
:rtype: list
s+ cannot encode objects that are not 2-tuplesN( R? RX R R Rn Ro Rp t collectionst MappingR5 t list( Rq ( ( s> /usr/lib/python2.7/site-packages/pip/_vendor/requests/utils.pyt to_key_val_list� s c C sh g } x[ t | � D]M } | d | d k o8 d k n rS t | d d !� } n | j | � q W| S( s 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`
:rtype: list
i i����t "( t _parse_list_headert unquote_header_valuet append( Rq t resultt item( ( s> /usr/lib/python2.7/site-packages/pip/_vendor/requests/utils.pyt parse_list_header s $c C s� i } x� t | � D]~ } d | k r5 d | | <q n | j d d � \ } } | d | d k ol d k n r� t | d d !� } n | | | <q W| S( s^ 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`
:rtype: dict
t =i i����Rw N( Rx R? R) Ry ( Rq R{ R| Rg ( ( s> /usr/lib/python2.7/site-packages/pip/_vendor/requests/utils.pyt parse_dict_header1 s
$c C sq | rm | d | d k o% d k n rm | d d !} | sN | d d k rm | j d d � j d d � Sn | S( s� Unquotes a header value. (Reversal of :func:`quote_header_value`).
This does not use the real unquoting but what browsers are actually
using for quoting.
:param value: the header value to unquote.
:rtype: str
i i����Rw i i s \\s \s \"( R+ ( Rq t is_filename( ( s> /usr/lib/python2.7/site-packages/pip/_vendor/requests/utils.pyRy T s
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c C s+ i } x | D] } | j | | j <q
W| S( s� Returns a key/value dictionary from a CookieJar.
:param cj: CookieJar object to extract cookies from.
:rtype: dict
( Rq Rg ( t cjt cookie_dictt cookie( ( s> /usr/lib/python2.7/site-packages/pip/_vendor/requests/utils.pyt dict_from_cookiejarm s
c C s
t | | � S( s� Returns a CookieJar from a key/value dictionary.
:param cj: CookieJar to insert cookies into.
:param cookie_dict: Dict of key/values to insert into CookieJar.
:rtype: CookieJar
( R ( R� R� ( ( s> /usr/lib/python2.7/site-packages/pip/_vendor/requests/utils.pyt add_dict_to_cookiejar| s c C sv t j d t � t j d d t j �} t j d d t j �} t j d � } | j | � | j | � | j | � S( sl Returns encodings from given content string.
:param content: bytestring to extract encodings from.
s� In requests 3.0, get_encodings_from_content will be removed. For more information, please see the discussion on issue #2266. (This warning should only appear once.)s! <meta.*?charset=["\']*(.+?)["\'>]t flagss+ <meta.*?content=["\']*;?charset=(.+?)["\'>]s$ ^<\?xml.*?encoding=["\']*(.+?)["\'>]( RF RG t DeprecationWarningR, t compileR. t findall( t contentt
charset_ret pragma_ret xml_re( ( s> /usr/lib/python2.7/site-packages/pip/_vendor/requests/utils.pyt get_encodings_from_content� s c C s_ | j d � } | s d St j | � \ } } d | k rK | d j d � Sd | k r[ d Sd S( s} Returns encodings from given HTTP Header Dict.
:param headers: dictionary to extract encoding from.
:rtype: str
s content-typet charsets '"t texts
ISO-8859-1N( t getR? t cgit parse_headert strip( t headerst content_typet params( ( s> /usr/lib/python2.7/site-packages/pip/_vendor/requests/utils.pyt get_encoding_from_headers� s c c s� | j d k r) x | D] } | Vq Wd St j | j � d d � } x+ | D]# } | j | � } | rK | VqK qK W| j d d t �} | r� | Vn d S( s Stream decodes a iterator.Nt errorsR+ t t final( t encodingR? t codecst getincrementaldecoderRY R* ( t iteratort rR| t decodert chunkt rv( ( s> /usr/lib/python2.7/site-packages/pip/_vendor/requests/utils.pyt stream_decode_response_unicode� s
c c sd d } | d k s | d k r- t | � } n x0 | t | � k r_ | | | | !V| | 7} q0 Wd S( s Iterate over slices of a string.i N( R? R: ( t stringt slice_lengtht pos( ( s> /usr/lib/python2.7/site-packages/pip/_vendor/requests/utils.pyt iter_slices� s c C s� t j d t � g } t | j � } | rc y t | j | � SWqc t k
r_ | j | � qc Xn y t | j | d d �SWn t k
r� | j SXd S( s� 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
:rtype: str
s� 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.)R� R+ N(
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t4 ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzs 0123456789-._~c C s� | j d � } x� t d t | � � D]� } | | d d !} t | � d k r� | j � r� y t t | d � � } Wn! t k
r� t d | � � n X| t k r� | | | d | | <q� d | | | | <q% d | | | | <q% Wd j | � S( s� Un-escape any percent-escape sequences in a URI that are unreserved
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:rtype: str
t %i i i i s% Invalid percent-escape sequence: '%s'R� (
R) t rangeR: t isalnumt chrRo Rp R t UNRESERVED_SETt join( t urit partst it ht c( ( s> /usr/lib/python2.7/site-packages/pip/_vendor/requests/utils.pyt unquote_unreserved� s
c C sK d } d } y t t | � d | �SWn t k
rF t | d | �SXd S( s� 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.
:rtype: str
s !#$%&'()*+,/:;=?@[]~s !#$&'()*+,/:;=?@[]~t safeN( R R� R ( R� t safe_with_percentt safe_without_percent( ( s> /usr/lib/python2.7/site-packages/pip/_vendor/requests/utils.pyt requote_uri
s
c C s� t j d t j | � � d } | j d � \ } } t j d t j t t | � � � � d } t j d t j | � � d | @} | | @| | @k S( s� This function allows you to check if an 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
:rtype: bool
s =Li t /( t structt unpackt sockett inet_atonR) t dotted_netmaskRo ( t ipt nett ipaddrt netaddrt bitst netmaskt network( ( s> /usr/lib/python2.7/site-packages/pip/_vendor/requests/utils.pyt address_in_network# s
+#c C s/ d d d | >d A} t j t j d | � � S( s� Converts mask from /xx format to xxx.xxx.xxx.xxx
Example: if mask is 24 function returns 255.255.255.0
:rtype: str
I���� i i s >I( R� t inet_ntoaR� t pack( t maskR� ( ( s> /usr/lib/python2.7/site-packages/pip/_vendor/requests/utils.pyR� 2 s c C s- y t j | � Wn t j k
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:rtype: bool
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c c st | d k } | r4 t j j | � } | t j | <n z d VWd | ro | d k r_ t j | =qo | t j | <n Xd S( s� Set the environment variable 'env_name' to 'value'
Save previous value, yield, and then restore the previous value stored in
the environment variable 'env_name'.
If 'value' is None, do nothingN( R? RB t environR� ( t env_nameRq t
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Return a dict of environment proxies.
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R� N( R� R
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:param proxies: A dictionary of schemes or schemes and hosts to proxy URLs
t alls ://s all://N( R t hostnameR? R� t scheme( R^ t proxiest urlpartst
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Return a string representing the default user agent.
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c C s� g } d } x� t j d | � D]� } y | j d d � \ } } Wn t k
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r� Pn X| j | � | | j | � <q� W| j | � q W| S( s� 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"
:rtype: list
s '"s , *<R i R� s <> '"R^ R~ ( R, R) Rp R� Rz ( Rq t linkst
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s RQ i i c C s | d } | t j t j f k r& d S| d t j k r= d S| d t j t j f k r] d S| j t � } | d k r| d S| d k r� | d d d � t k r� d
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i s utf-32i s utf-8-sigi s utf-16i s utf-8Ns utf-16-bei s utf-16-les utf-32-bes utf-32-le( R� t BOM_UTF32_LEt BOM_UTF32_BEt BOM_UTF8t BOM_UTF16_LEt BOM_UTF16_BER� t _nullt _null2t _null3R? ( t datat samplet nullcount( ( s> /usr/lib/python2.7/site-packages/pip/_vendor/requests/utils.pyt guess_json_utf s*
c C sS t | | � \ } } } } } } | s7 | | } } n t | | | | | | f � S( s� Given a URL that may or may not have a scheme, prepend the given scheme.
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:rtype: str
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rM d } n X| S( s{ Given a url with authentication components, extract them into a tuple of
username,password.
:rtype: (str,str)
R� ( R� R� ( R R t usernamet passwordR] R� ( R^ t parsedt auth( ( s> /usr/lib/python2.7/site-packages/pip/_vendor/requests/utils.pyt get_auth_from_urlB s "
s ^\S[^\r\n]*$|^$c C s� | \ } } t | t � r$ t } n t } y& | j | � sO t d | � � n Wn0 t k
r� t d | | t | � f � � n Xd S( s� Verifies that header value is a string which doesn't contain
leading whitespace or return characters. This prevents unintended
header injection.
:param header: tuple, in the format (name, value).
s7 Invalid return character or leading space in header: %ss> Value for header {%s: %s} must be of type str or bytes, not %sN( RX R t _CLEAN_HEADER_REGEX_BYTEt _CLEAN_HEADER_REGEX_STRR- R R� t type( t headerRg Rq t pat( ( s> /usr/lib/python2.7/site-packages/pip/_vendor/requests/utils.pyt check_header_validityW s
c C sf t | � \ } } } } } } | s4 | | } } n | j d d � d } t | | | | | d f � S( sW
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c C s} t | j d d � } | d k rm t | j t � rm y | | j � Wqy t t f k
ri t d � � qy Xn t d � � d S( sf Move file pointer back to its recorded starting position
so it can be read again on redirect.
R> s; An error occurred when rewinding request body for redirect.s+ Unable to rewind request body for redirect.N( Rj t bodyR? RX t _body_positionR RH R' R ( t prepared_requestt body_seek( ( s> /usr/lib/python2.7/site-packages/pip/_vendor/requests/utils.pyt rewind_body} s ( s .netrcR (` t __doc__R� R� Rs t
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