a
    Ba_Aw                     @   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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$m%Z% ddl&m'Z' ddl(m)Z)m*Z*m+Z+m,Z, dZ-e. Z/dddZ0ej1dkr:dd Z2dd Zdd Z3dd Z4diddZ5dd Z6dd  Z7d!d" Z8d#d$ Z9d%d& Z:d'd( Z;djd)d*Z<d+d, Z=d-d. Z>d/d0 Z?d1d2 Z@d3d4 ZAd5d6 ZBd7d8 ZCd9d: ZDeEd;ZFd<d= ZGd>d? ZHd@dA ZIdBdC ZJdDdE ZKdFdG ZLejMdHdI ZNdJdK ZOdkdLdMZPdNdO ZQdldQdRZRdSdT ZSdUdV ZTdWUdXZVeVdY ZWeVdZ ZXd[d\ ZYd]d^ ZZd_d` Z[e\daZ]e\dbZ^dcdd Z_dedf Z`dgdh ZadS )mz
requests.utils
~~~~~~~~~~~~~~

This module provides utility functions that are used within Requests
that are also useful for external consumption.
    N)OrderedDict   __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  )ZhttpZhttpsZwin32c                 C   s   zt rdd l}ndd l}W n ty.   Y dS 0 z6||jd}t||dd }||dd }W n tyz   Y dS 0 |r|sdS |	d}|D ]T}|dkrd| vr d	S |
dd
}|
dd}|
dd}t|| tjr d	S qdS )Nr   Fz;Software\Microsoft\Windows\CurrentVersion\Internet SettingsZProxyEnableZProxyOverride;z<local>.Tz\.*z.*?)r   winregZ_winregImportErrorOpenKeyHKEY_CURRENT_USERintZQueryValueExOSErrorsplitreplacerematchI)hostr$   ZinternetSettingsZproxyEnableZproxyOverridetest r1   0/usr/lib/python3/dist-packages/requests/utils.pyproxy_bypass_registry0   sF    

r3   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   r3   )r/   r1   r1   r2   r   W   s    r   c                 C   s   t | dr|  } | S )z/Returns an internal sequence dictionary update.items)hasattrr4   )dr1   r1   r2   dict_to_sequencec   s    
r7   c              	   C   s.  d }d}t | drt| }n`t | dr.| j}nNt | dr|z|  }W n tjyX   Y n$0 t|j}d| jvr|t	
dt t | drz|  }W n" ttfy   |d ur|}Y n\0 t | dr|d u rz&| dd	 |  }| |pd W n ttfy   d}Y n0 |d u r d}td|| S )
Nr   __len__lenfilenoba%  Requests has determined the content-length for this request using the binary size of the file: however, the file has been opened in text mode (i.e. without the 'b' flag in the mode). This may lead to an incorrect content-length. In Requests 3.0, support will be removed for files in text mode.tellseek   )r5   r9   r:   ioUnsupportedOperationosfstatst_sizemodewarningswarnr   r<   r)   IOErrorr=   max)oZtotal_lengthZcurrent_positionr:   r1   r1   r2   	super_lenl   sB    








rJ   Fc              	   C   sF  t jd}|dur|f}ndd tD } zddlm}m} d}|D ]B}zt j|}W n tyr   Y  W dS 0 t j	|rF|} qqF|du rW dS t
| }	d}
t| tr|
d}
|	j|
d }z<|||}|r|d rdnd	}|| |d
 fW W S W n  |tfy$   |r  Y n0 W n ttfy@   Y n0 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fr1   r1   r2   	<genexpr>       z!get_netrc_auth.<locals>.<genexpr>r   )netrcNetrcParseError   :asciir   r>   )rA   environgetNETRC_FILESrP   rQ   path
expanduserKeyErrorexistsr
   
isinstancer   decodenetlocr*   ZauthenticatorsrG   r%   AttributeError)urlZraise_errorsZ
netrc_fileZnetrc_locationsrP   rQ   Z
netrc_pathrM   ZlocZriZsplitstrr/   r   Zlogin_ir1   r1   r2   get_netrc_auth   s@    

r`   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   <>)getattrr[   r   rA   rW   basename)objra   r1   r1   r2   guess_filename   s
    
rh   c                 C   s   t j| r| S t j| \}}|rPt j|sPt j|\}}d||g}q t|s^| S t|}|| vrx| S t	
 }t jj|g|dR  }t j|s|j||d}|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.
    /)rW   )rA   rW   rZ   r*   joinzipfileZ
is_zipfileZZipFileZnamelisttempfileZ
gettempdirextract)rW   archivememberprefixZzip_filetmpZextracted_pathr1   r1   r2   extract_zipped_paths   s     

rr   c                 C   s.   | du 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
    N+cannot encode objects that are not 2-tuples)r[   r   r   boolr(   
ValueErrorr   valuer1   r1   r2   from_key_val_list
  s
    rx   c                 C   s@   | du 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
    Nrs   )	r[   r   r   rt   r(   ru   r   r4   listrv   r1   r1   r2   to_key_val_list%  s    
rz   c                 C   sX   g }t | D ]F}|dd |dd   kr4dkrHn nt|dd }|| q|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   rc   ")_parse_list_headerunquote_header_valueappend)rw   resultitemr1   r1   r2   parse_list_headerC  s    (r   c                 C   sx   i }t | D ]f}d|vr"d||< q|dd\}} | dd | dd   krVdkrjn nt| dd } | ||< q|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   rc   r{   )r|   r*   r}   )rw   r   r   ra   r1   r1   r2   parse_dict_headerc  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   rc   r{   r   Nr>   z\\\z\")r+   )rw   Zis_filenamer1   r1   r2   r}     s
    $r}   c                 C   s   i }| D ]}|j ||j< q|S )zReturns a key/value dictionary from a CookieJar.

    :param cj: CookieJar object to extract cookies from.
    :rtype: dict
    )rw   ra   )cjcookie_dictZcookier1   r1   r2   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   r1   r1   r2   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=["\']*(.+?)["\'>])rE   rF   DeprecationWarningr,   compiler.   findall)contentZ
charset_reZ	pragma_reZxml_rer1   r1   r2   get_encodings_from_content  s    
r   c           
      C   s   |  d}|d  |dd  }}i }d}|D ]`}| }|r0|d }}|d}	|	dkr|d|	 |}||	d d |}||| < q0||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   rc   )r*   stripfindlower)
headertokenscontent_typeparamsZparams_dictZitems_to_stripparamkeyrw   Zindex_of_equalsr1   r1   r2   _parse_content_type_header  s    


r   c                 C   sP   |  d}|sdS t|\}}d|v r4|d dS d|v r@dS d|v 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/jsonutf-8)rU   r   r   )headersr   r   r1   r1   r2   get_encoding_from_headers  s    
r   c                 c   sj   |j du r| D ]
}|V  qdS t|j dd}| D ]}||}|r4|V  q4|jddd}|rf|V  dS )zStream decodes a iterator.Nr+   errorsrO   T)final)encodingcodecsgetincrementaldecoderr\   )iteratorrr   decoderchunkrvr1   r1   r2   stream_decode_response_unicode  s    

r   c                 c   sH   d}|du s|dkrt | }|t | k rD| |||  V  ||7 }qdS )z Iterate over slices of a string.r   N)r9   )stringZslice_lengthposr1   r1   r2   iter_slices  s    r   c                 C   sz   t dt g }t| j}|rJzt| j|W S  tyH   || Y n0 zt| j|ddW S  t	yt   | j Y S 0 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.)r+   r   N)
rE   rF   r   r   r   r   r   UnicodeErrorr~   	TypeError)r   Ztried_encodingsr   r1   r1   r2   get_unicode_from_response  s    
r   zBABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-._~c              	   C   s   |  d}tdt|D ]}|| dd }t|dkr| rztt|d}W n typ   td| Y n0 |tv r||| dd  ||< qd||  ||< qd||  ||< q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   r>      z%Invalid percent-escape sequence: '%s'N )
r*   ranger9   isalnumchrr(   ru   r   UNRESERVED_SETrj   )uripartsihcr1   r1   r2   unquote_unreservedD  s    
r   c                 C   s>   d}d}zt t| |dW S  ty8   t | |d Y S 0 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!#$%&'()*+,/:;=?@[]~z!#$&'()*+,/:;=?@[]~)ZsafeN)r	   r   r   )r   Zsafe_with_percentZsafe_without_percentr1   r1   r2   requote_uri\  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   ri   )structZunpacksocket	inet_atonr*   dotted_netmaskr(   )ZipZnetZipaddrZnetaddrbitsZnetmaskZnetworkr1   r1   r2   address_in_networkr  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   Z	inet_ntoar   Zpack)maskr   r1   r1   r2   r     s    r   c                 C   s*   zt |  W n t jy$   Y dS 0 dS )z
    :rtype: bool
    FT)r   r   error)Z	string_ipr1   r1   r2   is_ipv4_address  s
    r   c                 C   s   |  ddkrzt| dd }W n ty8   Y dS 0 |dk sJ|dkrNdS zt| dd  W q tjy|   Y dS 0 ndS dS )zV
    Very simple check of the cidr format in no_proxy variable.

    :rtype: bool
    ri   r   Fr   r   T)countr(   r*   ru   r   r   r   )Zstring_networkr   r1   r1   r2   is_valid_cidr  s    
r   c              	   c   st   |du}|r"t j| }|t j| < z*dV  W |rp|du rBt j| = qp|t j| < n"|rn|du rdt j| = n
|t j| < 0 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)rA   rT   rU   )Zenv_namerw   Zvalue_changed	old_valuer1   r1   r2   set_environ  s    


r   c           	   
   C   s>  dd }|}|du r|d}t | }|jdu r2dS |rdd |dd	d
D }t|jr|D ]0}t|rt|j|r dS q`|j|kr` dS q`nB|j}|jr|d|j7 }|D ] }|j	|s|	|r dS qt
d|> zt|j}W n ttjfy   d}Y n0 W d   n1 s&0    Y  |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)rA   rT   rU   upper)kr1   r1   r2   <lambda>  rO   z'should_bypass_proxies.<locals>.<lambda>Nno_proxyTc                 s   s   | ]}|r|V  qd S r   r1   )rL   r/   r1   r1   r2   rN     s   z(should_bypass_proxies.<locals>.<genexpr> r   ,z:{}F)r
   hostnamer+   r*   r   r   r   ZportrK   endswithr   r   r   r   Zgaierror)	r_   r   Z	get_proxyZno_proxy_argparsedZproxy_ipZhost_with_portr/   Zbypassr1   r1   r2   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   )r_   r   r1   r1   r2   get_environ_proxies  s    r   c                 C   st   |pi }t | }|jdu r.||j|dS |jd |j |jd|j dg}d}|D ]}||v rV|| } qpqV|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   rU   scheme)r_   ZproxiesZurlpartsZ
proxy_keysproxyZ	proxy_keyr1   r1   r2   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/%sr   )ra   r1   r1   r2   default_user_agent(  s    r   c                   C   s   t t dddddS )z9
    :rtype: requests.structures.CaseInsensitiveDict
    z, )ZgzipZdeflatez*/*z
keep-alive)z
User-AgentzAccept-EncodingZAcceptZ
Connection)r   r   rj   r1   r1   r1   r2   default_headers1  s    r   c           	   
   C   s   g }d}|  |} | s|S td| D ]}z|dd\}}W n tyZ   |d }}Y n0 d| di}|dD ]D}z|d\}} W n ty   Y  qY n0 |  ||| |< qt|| q&|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   r_   z<> '"r   )r   r,   r*   ru   r~   )	rw   ZlinksZreplace_charsvalr_   r   linkr   r   r1   r1   r2   parse_header_links=  s&    
r    rS   r>      c                 C   s   | dd }|t jt jfv r dS |dd t jkr6dS |dd t jt jfv 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-sigr>   zutf-16r   r   z	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)dataZsampleZ	nullcountr1   r1   r2   guess_json_utfh  s*    
r   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   )r_   Z
new_schemer   r]   rW   r   queryfragmentr1   r1   r2   prepend_scheme_if_needed  s    
r   c              	   C   s@   t | }zt|jt|jf}W n ttfy:   d}Y n0 |S )z{Given a url with authentication components, extract them into a tuple of
    username,password.

    :rtype: (str,str)
    )r   r   )r
   r   ZusernameZpasswordr^   r   )r_   r   Zauthr1   r1   r2   get_auth_from_url  s    
r   s   ^\S[^\r\n]*$|^$z^\S[^\r\n]*$|^$c              	   C   sd   | \}}t |trt}nt}z||s4td| W n( ty^   td||t|f Y n0 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)r[   r   _CLEAN_HEADER_REGEX_BYTE_CLEAN_HEADER_REGEX_STRr-   r   r   type)r   ra   rw   Zpatr1   r1   r2   check_header_validity  s    

r   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   rc   r   )r
   rsplitr   )r_   r   r]   rW   r   r   r   r1   r1   r2   urldefragauth  s
    
r   c              	   C   s^   t | jdd}|durRt| jtrRz|| j W qZ ttfyN   tdY qZ0 ntddS )zfMove file pointer back to its recorded starting position
    so it can be read again on redirect.
    r=   Nz;An error occurred when rewinding request body for redirect.z+Unable to rewind request body for redirect.)re   bodyr[   Z_body_positionr   rG   r)   r   )Zprepared_requestZ	body_seekr1   r1   r2   rewind_body  s    r   )F)F)N)r   )b__doc__r   
contextlibr?   rA   r,   r   r   sysrl   rE   rk   collectionsr   r   r   r   Z_internal_utilsr   compatr   r|   r	   r
   r   r   r   r   r   r   r   r   r   r   r   r   Zcookiesr   Z
structuresr   
exceptionsr   r   r   r   rV   whereZDEFAULT_CA_BUNDLE_PATHZDEFAULT_PORTSplatformr3   r7   rJ   r`   rh   rr   rx   rz   r   r   r}   r   r   r   r   r   r   r   r   	frozensetr   r   r   r   r   r   r   contextmanagerr   r   r   r   r   r   r   encoder   r   r   r   r   r   r   r   r   r   r   r   r1   r1   r1   r2   <module>   s   @
'	=
9  #

%
=

	&
 

