B
    +az                 @   s  d Z ddlZddlZddlZddlZddlZddlZddlZddlZddl	Z	ddl
Z
ddlZddlmZ ddlmZ ddlmZ ddlmZ ddlmZ dd	lmZ dd
lmZmZmZmZmZmZmZmZm Z m!Z!m"Z"m#Z#m$Z$m%Z% ddl&m'Z' ddl(m)Z) ddl*m+Z+m,Z,m-Z-m.Z. dZ/e0 Z1dddZ2d3e4deddd Z5ej6dkrbdd Z7dd Zdd Z8dd Z9dqd!d"Z:d#d$ Z;d%d& Z<ej=d'd( Z>d)d* Z?d+d, Z@d-d. ZAd/d0 ZBdrd1d2ZCd3d4 ZDd5d6 ZEd7d8 ZFd9d: ZGd;d< ZHd=d> ZId?d@ ZJdAdB ZKeLdCZMdDdE ZNdFdG ZOdHdI ZPdJdK ZQdLdM ZRdNdO ZSej=dPdQ ZTdRdS ZUdsdTdUZVdVdW ZWdtdYdZZXd[d\ ZYd]d^ ZZd_[d`Z\e\da Z]e\db Z^dcdd Z_dedf Z`dgdh ZaebdiZcebdjZddkdl Zedmdn Zfdodp ZgdS )uz
requests.utils
~~~~~~~~~~~~~~

This module provides utility functions that are used within Requests
that are also useful for external consumption.
    N)OrderedDict)make_headers   )__version__)certs)to_native_string)parse_http_list)quoteurlparsebytesstrunquote
getproxiesproxy_bypass
urlunparse
basestringinteger_typesis_py3proxy_bypass_environmentgetproxies_environmentMapping)cookiejar_from_dict)CaseInsensitiveDict)
InvalidURLInvalidHeaderFileModeWarningUnrewindableBodyError)z.netrc_netrcP   i  )httphttpsz, z,\s*T)accept_encodingzaccept-encodingwin32c             C   s   yt rdd l}ndd l}W n tk
r.   dS X y6||jd}t||dd }||dd }W n tk
rz   dS X |r|sdS |	d}xX|D ]P}|dkrd| krd	S |
dd
}|
dd}|
dd}t|| tjrd	S qW dS )Nr   Fz;Software\Microsoft\Windows\CurrentVersion\Internet SettingsZProxyEnableZProxyOverride;z<local>.Tz\.*z.*?)r   winreg_winregImportErrorOpenKeyHKEY_CURRENT_USERintQueryValueExOSErrorsplitreplacerematchI)hostr'   ZinternetSettingsZproxyEnableZproxyOverridetest r6   2/tmp/pip-unpacked-wheel-bpvnazb1/requests/utils.pyproxy_bypass_registry6   s8    


r8   c             C   s   t  rt| S t| S dS )zReturn True, if the host should be bypassed.

        Checks proxy settings gathered from the environment, if specified,
        or the registry.
        N)r   r   r8   )r4   r6   r6   r7   r   ]   s    r   c             C   s   t | dr|  } | S )z/Returns an internal sequence dictionary update.items)hasattrr9   )dr6   r6   r7   dict_to_sequencei   s    
r<   c          	   C   s4  d }d}t | drt| }nbt | dr.| j}nPt | dr~y|  }W n tjk
rZ   Y n$X t|j}d| jkr~t	
dt t | dry|  }W n$ ttfk
r   |d k	r|}Y n^X t | dr|d kry&| dd	 |  }| |pd W n ttfk
r   d}Y nX |d kr&d}td|| S )
Nr   __len__lenfilenoba%  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.tellseek   )r:   r>   r?   ioUnsupportedOperationosfstatst_sizemodewarningswarnr   rA   r.   IOErrorrB   max)ototal_lengthcurrent_positionr?   r6   r6   r7   	super_lenr   s@    







rQ   Fc          	   C   s>  t jd}|dk	r|f}ndd tD }yddlm}m} d}xD|D ]<}yt j|}W n tk
rn   dS X t j	|rF|}P qFW |dkrdS t
| }	d}
t| tr|
d}
|	j|
d }y6|||}|r|d rdnd	}|| |d
 fS W n" |tfk
r   |r Y nX W n ttfk
r8   Y nX dS )z;Returns the Requests tuple auth for a given url from netrc.ZNETRCNc             s   s   | ]}d  |V  qdS )z~/{}N)format).0fr6   r6   r7   	<genexpr>   s    z!get_netrc_auth.<locals>.<genexpr>r   )netrcNetrcParseError   :asciir   rC   )rF   environgetNETRC_FILESrV   rW   path
expanduserKeyErrorexistsr
   
isinstancer   decodenetlocr/   authenticatorsrL   r)   AttributeError)urlraise_errorsZ
netrc_fileZnetrc_locationsrV   rW   
netrc_pathrT   locrisplitstrr4   r   login_ir6   r6   r7   get_netrc_auth   s@    


rm   c             C   sB   t | dd}|r>t|tr>|d dkr>|d dkr>tj|S dS )z0Tries to guess the filename of the given object.nameNr   <>)getattrra   r   rF   r]   basename)objrn   r6   r6   r7   guess_filename   s    ru   c          	   C   s   t j| r| S t j| \}}x2|rRt j|sRt j|\}}d||g}q"W t|sb| S t|}|| kr|| S t	
 }t j||dd }t j|st|}||| W dQ R X |S )zReplace nonexistent paths that look like they refer to a member of a zip
    archive with the location of an extracted copy of the target, or else
    just return the provided path unchanged.
    /rp   N)rF   r]   r`   r/   joinzipfile
is_zipfileZipFilenamelisttempfile
gettempdiratomic_openwriteread)r]   archivememberprefixzip_filetmpextracted_pathZfile_handlerr6   r6   r7   extract_zipped_paths   s"    


r   c          	   c   s   t jd dkrtjntj}tjtj| d\}}y,t	|d}|V  W dQ R X |||  W n  t
k
r~   t|  Y nX dS )z-Write a file to the disk in an atomic fashionr   rC   )dirwbN)sysversion_inforF   renamer0   r|   mkstempr]   dirnamefdopenBaseExceptionremove)filenamereplacerZtmp_descriptorZtmp_nameZtmp_handlerr6   r6   r7   r~     s    
r~   c             C   s.   | dkrdS t | ttttfr&tdt| S )a  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')
        Traceback (most recent call last):
        ...
        ValueError: cannot encode objects that are not 2-tuples
        >>> from_key_val_list({'key': 'val'})
        OrderedDict([('key', 'val')])

    :rtype: OrderedDict
    Nz+cannot encode objects that are not 2-tuples)ra   r   r   boolr,   
ValueErrorr   )valuer6   r6   r7   from_key_val_list  s
    r   c             C   s@   | dkrdS t | ttttfr&tdt | tr8|  } t| S )a  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')
        Traceback (most recent call last):
        ...
        ValueError: cannot encode objects that are not 2-tuples

    :rtype: list
    Nz+cannot encode objects that are not 2-tuples)	ra   r   r   r   r,   r   r   r9   list)r   r6   r6   r7   to_key_val_list:  s    
r   c             C   s\   g }xRt | D ]F}|dd |dd   kr6dkrJn nt|dd }|| qW |S )a  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
    Nr   rp   ")_parse_list_headerunquote_header_valueappend)r   resultitemr6   r6   r7   parse_list_headerX  s    (r   c             C   s|   i }xrt | D ]f}d|kr$d||< q|dd\}} | dd | dd   krXdkrln nt| dd } | ||< qW |S )a^  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
    =Nr   rp   r   )r   r/   r   )r   r   r   rn   r6   r6   r7   parse_dict_headerx  s    (r   c             C   s\   | rX| d | d   kr dkrXn n4| dd } |rD| dd dkrX|  dd d	dS | S )
zUnquotes 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
    r   rp   r   r   NrC   z\\\z\")r0   )r   is_filenamer6   r6   r7   r     s
    $r   c             C   s"   i }x| D ]}|j ||j< q
W |S )zReturns a key/value dictionary from a CookieJar.

    :param cj: CookieJar object to extract cookies from.
    :rtype: dict
    )r   rn   )cjcookie_dictcookier6   r6   r7   dict_from_cookiejar  s    
r   c             C   s
   t || S )zReturns 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   r6   r6   r7   add_dict_to_cookiejar  s    r   c             C   sT   t dt tjdtjd}tjdtjd}td}|| ||  ||  S )zlReturns encodings from given content string.

    :param content: bytestring to extract encodings from.
    zIn 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.)z!<meta.*?charset=["\']*(.+?)["\'>])flagsz+<meta.*?content=["\']*;?charset=(.+?)["\'>]z$^<\?xml.*?encoding=["\']*(.+?)["\'>])rJ   rK   DeprecationWarningr1   compiler3   findall)content
charset_re	pragma_rexml_rer6   r6   r7   get_encodings_from_content  s    
r   c       
      C   s   |  d}|d  |dd  }}i }d}xh|D ]`}| }|r2|d }}|d}	|	dkr|d|	 |}||	d d |}||| < q2W ||fS )	zReturns content type and parameters from given header

    :param header: string
    :return: tuple containing content type and dictionary of
         parameters
    r#   r   r   Nz"' Tr   rp   )r/   stripfindlower)
headertokenscontent_typeparamsparams_dictitems_to_stripparamkeyr   index_of_equalsr6   r6   r7   _parse_content_type_header  s    



r   c             C   sP   |  d}|sdS t|\}}d|kr4|d dS d|kr@dS d|krLdS dS )	z}Returns encodings from given HTTP Header Dict.

    :param headers: dictionary to extract encoding from.
    :rtype: str
    zcontent-typeNcharsetz'"textz
ISO-8859-1zapplication/jsonzutf-8)r[   r   r   )headersr   r   r6   r6   r7   get_encoding_from_headers  s    
r   c             c   sr   |j dkr"x| D ]
}|V  qW dS t|j dd}x | D ]}||}|r:|V  q:W |jddd}|rn|V  dS )zStream decodes a iterator.Nr0   )errors    T)final)encodingcodecsgetincrementaldecoderrb   )iteratorrr   decoderchunkrvr6   r6   r7   stream_decode_response_unicode  s    





r   c             c   sL   d}|dks|dkrt | }x*|t | k rF| |||  V  ||7 }qW dS )z Iterate over slices of a string.r   N)r>   )stringslice_lengthposr6   r6   r7   iter_slices&  s    r   c             C   sv   t dt g }t| j}|rJyt| j|S  tk
rH   || Y nX yt| j|ddS  t	k
rp   | jS X dS )zReturns 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
    zIn 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.)r0   )r   N)
rJ   rK   r   r   r   r   r   UnicodeErrorr   	TypeError)r   tried_encodingsr   r6   r6   r7   get_unicode_from_response0  s    
r   zBABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-._~c          	   C   s   |  d}xtdt|D ]}|| dd }t|dkr| rytt|d}W n  tk
rt   td| Y nX |tkr||| dd  ||< qd||  ||< qd||  ||< qW d	|S )	zUn-escape any percent-escape sequences in a URI that are unreserved
    characters. This leaves all reserved, illegal and non-ASCII bytes encoded.

    :rtype: str
    %r   r   rC      z%Invalid percent-escape sequence: '%s'N )
r/   ranger>   isalnumchrr,   r   r   UNRESERVED_SETrw   )uripartsihcr6   r6   r7   unquote_unreservedY  s    
r   c             C   s:   d}d}yt t| |dS  tk
r4   t | |dS X dS )zRe-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
    z!#$%&'()*+,/:;=?@[]~z!#$&'()*+,/:;=?@[]~)safeN)r	   r   r   )r   safe_with_percentsafe_without_percentr6   r6   r7   requote_uriq  s    r   c             C   sl   t dt| d }|d\}}t dttt|d }t dt|d |@ }||@ ||@ kS )zThis 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
    z=Lr   rv   )structunpacksocket	inet_atonr/   dotted_netmaskr,   )ipnetipaddrnetaddrbitsnetmasknetworkr6   r6   r7   address_in_network  s
    r   c             C   s&   ddd|  > d A }t td|S )zConverts mask from /xx format to xxx.xxx.xxx.xxx

    Example: if mask is 24 function returns 255.255.255.0

    :rtype: str
    l    r       z>I)r   	inet_ntoar   pack)maskr   r6   r6   r7   r     s    r   c             C   s*   yt |  W n t jk
r$   dS X dS )z
    :rtype: bool
    FT)r   r   error)	string_ipr6   r6   r7   is_ipv4_address  s
    r   c             C   s   |  ddkryt| dd }W n tk
r8   dS X |dk sJ|dkrNdS yt| dd  W q tjk
r|   dS X ndS dS )zV
    Very simple check of the cidr format in no_proxy variable.

    :rtype: bool
    rv   r   Fr   r   T)countr,   r/   r   r   r   r   )string_networkr   r6   r6   r7   is_valid_cidr  s    r   c          	   c   sT   |dk	}|r"t j| }|t j| < z
dV  W d|rN|dkrDt j| = n
|t j| < X dS )zSet 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)rF   rZ   r[   )env_namer   value_changed	old_valuer6   r6   r7   set_environ  s    


r  c       	   
   C   s,  dd }|}|dkr|d}t | }|jdkr2dS |rdd |dd	d
D }t|jrxz|D ],}t|rt|j|rdS qb|j|krbdS qbW nD|j}|jr|d|j7 }x&|D ]}|j	|s|	|rdS qW t
d|6 yt|j}W n  ttjfk
r   d}Y nX W dQ R X |r(dS dS )zL
    Returns whether we should bypass proxies or not.

    :rtype: bool
    c             S   s   t j| pt j|  S )N)rF   rZ   r[   upper)kr6   r6   r7   <lambda>  r   z'should_bypass_proxies.<locals>.<lambda>Nno_proxyTc             s   s   | ]}|r|V  qd S )Nr6   )rS   r4   r6   r6   r7   rU     s    z(should_bypass_proxies.<locals>.<genexpr> r   ,z:{}F)r
   hostnamer0   r/   r   r   r   portrR   endswithr  r   r   r   gaierror)	rf   r  	get_proxyno_proxy_argparsedproxy_iphost_with_portr4   bypassr6   r6   r7   should_bypass_proxies  s<    





r  c             C   s   t | |dri S t S dS )zA
    Return a dict of environment proxies.

    :rtype: dict
    )r  N)r  r   )rf   r  r6   r6   r7   get_environ_proxies  s    r  c             C   sv   |pi }t | }|jdkr.||j|dS |jd |j |jd|j dg}d}x|D ]}||krX|| }P qXW |S )zSelect 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
    Nallz://zall://)r
   r
  r[   scheme)rf   proxiesurlparts
proxy_keysproxy	proxy_keyr6   r6   r7   select_proxy#  s    

r  python-requestsc             C   s   d| t f S )zO
    Return a string representing the default user agent.

    :rtype: str
    z%s/%s)r   )rn   r6   r6   r7   default_user_agent=  s    r  c               C   s   t t tdddS )z9
    :rtype: requests.structures.CaseInsensitiveDict
    z*/*z
keep-alive)z
User-AgentzAccept-EncodingAccept
Connection)r   r  DEFAULT_ACCEPT_ENCODINGr6   r6   r6   r7   default_headersF  s
    r#  c       	   
   C   s   g }d}|  |} | s|S xtd| D ]}y|dd\}}W n tk
r^   |d }}Y nX d| di}xP|dD ]B}y|d\}} W n tk
r   P Y nX |  ||| |< qzW || q(W |S )	zReturn a list 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
    z '"z, *<r#   r   r   rf   z<> '"r   )r   r1   r/   r   r   )	r   linksreplace_charsvalrf   r   linkr   r   r6   r6   r7   parse_header_linksR  s&    
r(   rY   rC      c             C   s   | dd }|t jt jfkr dS |dd t jkr6dS |dd t jt jfkrRdS |t}|dkrhd	S |dkr|ddd tkrd
S |ddd tkrdS |dkr|dd t	krdS |dd t	krdS dS )z
    :rtype: str
    N   zutf-32r*  z	utf-8-sigrC   zutf-16r   zutf-8z	utf-16-ber   z	utf-16-lez	utf-32-bez	utf-32-le)
r   BOM_UTF32_LEBOM_UTF32_BEBOM_UTF8BOM_UTF16_LEBOM_UTF16_BEr   _null_null2_null3)datasample	nullcountr6   r6   r7   guess_json_utf}  s*    
r7  c             C   s8   t | |\}}}}}}|s$|| }}t||||||fS )zGiven 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.

    :rtype: str
    )r
   r   )rf   
new_schemer  rc   r]   r   queryfragmentr6   r6   r7   prepend_scheme_if_needed  s    
r;  c          	   C   sB   t | }yt|jt|jf}W n ttfk
r<   d}Y nX |S )z{Given a url with authentication components, extract them into a tuple of
    username,password.

    :rtype: (str,str)
    )r   r   )r
   r   usernamepasswordre   r   )rf   r  authr6   r6   r7   get_auth_from_url  s    
r?  s   ^\S[^\r\n]*$|^$z^\S[^\r\n]*$|^$c          	   C   sf   | \}}t |trt}nt}y||s4td| W n* tk
r`   td||t|f Y nX dS )zVerifies 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).
    z7Invalid return character or leading space in header: %sz>Value for header {%s: %s} must be of type str or bytes, not %sN)ra   r   _CLEAN_HEADER_REGEX_BYTE_CLEAN_HEADER_REGEX_STRr2   r   r   type)r   rn   r   patr6   r6   r7   check_header_validity  s    

rD  c             C   sF   t | \}}}}}}|s"|| }}|ddd }t|||||dfS )zW
    Given a url remove the fragment and the authentication part.

    :rtype: str
    @r   rp   r   )r
   rsplitr   )rf   r  rc   r]   r   r9  r:  r6   r6   r7   urldefragauth  s
    
rG  c          	   C   s`   t | jdd}|dk	rTt| jtrTy|| j W q\ ttfk
rP   tdY q\X ntddS )zfMove file pointer back to its recorded starting position
    so it can be read again on redirect.
    rB   Nz;An error occurred when rewinding request body for redirect.z+Unable to rewind request body for redirect.)rr   bodyra   _body_positionr   rL   r.   r   )prepared_request	body_seekr6   r6   r7   rewind_body  s    rL  )F)F)N)r  )h__doc__r   
contextlibrD   rF   r1   r   r   r   r|   rJ   rx   collectionsr   Zurllib3.utilr   r   r   r   _internal_utilsr   compatr   r   r	   r
   r   r   r   r   r   r   r   r   r   r   r   r   cookiesr   
structuresr   
exceptionsr   r   r   r   r\   whereDEFAULT_CA_BUNDLE_PATHDEFAULT_PORTSrw   r/   r"  platformr8   r<   rQ   rm   ru   r   contextmanagerr~   r   r   r   r   r   r   r   r   r   r   r   r   r   	frozensetr   r   r   r   r   r   r   r  r  r  r  r  r#  r(  encoder1  r2  r3  r7  r;  r?  r   r@  rA  rD  rG  rL  r6   r6   r6   r7   <module>	   s   @
'	=
9! #

%=

	&
 

