B
    +ć                 @   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mZ ddlmZ ddlmZ ddlmZmZ dd	lmZmZmZmZmZmZ dd
lmZ ddlm Z m!Z!m"Z"m#Z#m$Z$m%Z%m&Z& ddl'm(Z( ddl)m*Z*m+Z+m,Z,m-Z- ddl.m/Z/ dZ0e1 Z2dddZ3d4e5deddd Z6ej7dkrndd Z8dd Z dd Z9dd  Z:dtd"d#Z;d$d% Z<d&d' Z=ej>d(d) Z?d*d+ Z@d,d- ZAd.d/ ZBd0d1 ZCdud2d3ZDd4d5 ZEd6d7 ZFd8d9 ZGd:d; ZHd<d= ZId>d? ZJd@dA ZKdBdC ZLeMdDZNdEdF ZOdGdH ZPdIdJ ZQdKdL ZRdMdN ZSdOdP ZTej>dQdR ZUdSdT ZVdvdUdVZWdWdX ZXdwdYdZZYdxd\d]ZZd^d_ Z[d`da Z\db]dcZ^e^dd Z_e^de Z`dfdg Zadhdi Zbdjdk Zcdldm Zddndo Zedpdq Zfdrds ZgdS )yz
requests.utils
~~~~~~~~~~~~~~

This module provides utility functions that are used within Requests
that are also useful for external consumption.
    N)OrderedDict)make_headers	parse_url   )certs)__version__)HEADER_VALIDATORSto_native_string)Mapping
basestringbytes
getproxiesgetproxies_environmentinteger_types)parse_http_list)proxy_bypassproxy_bypass_environmentquotestrunquoteurlparse
urlunparse)cookiejar_from_dict)FileModeWarningInvalidHeader
InvalidURLUnrewindableBodyError)CaseInsensitiveDict)z.netrc_netrcP   i  )ZhttpZhttpsz, z,\s*T)Zaccept_encodingzaccept-encodingwin32c          	   C   s   ydd l }W n tk
r    dS X y6||jd}t||dd }||dd }W n ttfk
rp   dS X |rz|s~d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.*?)winregImportErrorOpenKeyHKEY_CURRENT_USERintZQueryValueExOSError
ValueErrorsplitreplacerematchI)hostr%   ZinternetSettingsZproxyEnableZproxyOverrideZtest r2   -lib/python3.7/site-packages/requests/utils.pyproxy_bypass_registryG   s2    

r4   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   r4   )r1   r2   r2   r3   r   k   s    r   c             C   s   t | dr|  } | S )z/Returns an internal sequence dictionary update.items)hasattrr5   )dr2   r2   r3   dict_to_sequencew   s    
r8   c          	   C   s0  d }d}t | drt| }nft | dr.| j}nTt | dry|  }W n tjtfk
r^   Y n$X t|j}d| j	krt
dt t | dry|  }W n  tk
r   |d k	r|}Y nZX t | dr|d kry&| dd	 |  }| |pd W n t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   )r6   r:   r;   ioUnsupportedOperationAttributeErrorosfstatst_sizemodewarningswarnr   r=   r*   r>   max)oZtotal_lengthZcurrent_positionr;   r2   r2   r3   	super_len   s@    







rK   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~/Nr2   ).0fr2   r2   r3   	<genexpr>   s    z!get_netrc_auth.<locals>.<genexpr>r   )NetrcParseErrornetrc   :asciir   r?   )rC   environgetNETRC_FILESrP   rO   path
expanduserKeyErrorexistsr   
isinstancer   decodenetlocr,   Zauthenticatorsr*   r&   rB   )urlZraise_errorsZ
netrc_fileZnetrc_locationsrO   rP   Z
netrc_pathrM   locZriZsplitstrr1   r   Zlogin_ir2   r2   r3   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   <>)getattrrZ   r   rC   rV   basename)objr`   r2   r2   r3   guess_filename   s    &rg   c          	   C   s   t j| r| S t j| \}}x8|rXt j|sXt j|\}}|sHP d||g}q"W t|sh| 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.
    /rb   N)rC   rV   rY   r,   joinzipfileZ
is_zipfileZZipFileZnamelisttempfileZ
gettempdiratomic_openwriteread)rV   archivememberprefixZzip_fileZtmpZextracted_pathZfile_handlerr2   r2   r3   extract_zipped_paths  s&    


rr   c          	   c   sl   t jtj| d\}}y.t|d}|V  W dQ R X t||  W n  tk
rf   t|  Y nX dS )z-Write a file to the disk in an atomic fashion)dirwbN)	rk   ZmkstemprC   rV   dirnamefdopenr-   BaseExceptionremove)filenameZtmp_descriptorZtmp_nameZtmp_handlerr2   r2   r3   rl   '  s    
rl   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)rZ   r   r   boolr)   r+   r   )valuer2   r2   r3   from_key_val_list4  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)	rZ   r   r   rz   r)   r+   r
   r5   list)r{   r2   r2   r3   to_key_val_listO  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   rb   ")_parse_list_headerunquote_header_valueappend)r{   resultitemr2   r2   r3   parse_list_headerm  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   rb   r   )r   r,   r   )r{   r   r   r`   r2   r2   r3   parse_dict_header  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   rb   r   r   Nr?   z\\\z\")r-   )r{   Zis_filenamer2   r2   r3   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{   r`   )cjcookie_dictZcookier2   r2   r3   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   r2   r2   r3   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=["\']*(.+?)["\'>])rG   rH   DeprecationWarningr.   compiler0   findall)contentZ
charset_reZ	pragma_reZxml_rer2   r2   r3   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   rb   )r,   stripfindlower)
headertokenscontent_typeparamsZparams_dictZitems_to_stripparamkeyr{   Zindex_of_equalsr2   r2   r3   _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)rT   r   r   )headersr   r   r2   r2   r3   get_encoding_from_headers  s    
r   c             c   sh   |j dkr| E dH  dS t|j dd}x | D ]}||}|r0|V  q0W |jddd}|rd|V  dS )zStream decodes an iterator.Nr-   )errors    T)final)encodingcodecsgetincrementaldecoderr[   )iteratorrdecoderchunkrvr2   r2   r3   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:   )stringZslice_lengthposr2   r2   r3   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.)r-   )r   N)
rG   rH   r   r   r   r   r   UnicodeErrorr   	TypeError)r   Ztried_encodingsr   r2   r2   r3   get_unicode_from_responseI  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
rx   td| 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   r?      z"Invalid percent-escape sequence: ''N )
r,   ranger:   isalnumchrr)   r+   r   UNRESERVED_SETri   )uripartsihcr2   r2   r3   unquote_unreservedv  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!#$%&'()*+,/:;=?@[]~z!#$&'()*+,/:;=?@[]~)ZsafeN)r   r   r   )r   Zsafe_with_percentZsafe_without_percentr2   r2   r3   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   rh   )structunpacksocket	inet_atonr,   dotted_netmaskr)   )ZipZnetZipaddrZnetaddrbitsZnetmaskZnetworkr2   r2   r3   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   Z	inet_ntoar   pack)maskr   r2   r2   r3   r     s    r   c             C   s(   yt |  W n tk
r"   dS X dS )z
    :rtype: bool
    FT)r   r   r*   )Z	string_ipr2   r2   r3   is_ipv4_address  s
    r   c             C   s   |  ddkr~y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k
rz   dS X ndS dS )zV
    Very simple check of the cidr format in no_proxy variable.

    :rtype: bool
    rh   r   Fr   r   T)countr)   r,   r+   r   r   r*   )Zstring_networkr   r2   r2   r3   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)rC   rS   rT   )Zenv_namer{   Zvalue_changed	old_valuer2   r2   r3   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)rC   rS   rT   upper)r   r2   r2   r3   	get_proxy  s    z(should_bypass_proxies.<locals>.get_proxyNno_proxyTc             s   s   | ]}|r|V  qd S )Nr2   )rL   r1   r2   r2   r3   rN     s    z(should_bypass_proxies.<locals>.<genexpr> r   ,:F)r   hostnamer-   r,   r   r   r   portendswithr   r   r   r   Zgaierror)	r]   r   r   Zno_proxy_argparsedZproxy_ipZhost_with_portr1   Zbypassr2   r2   r3   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   r2   r2   r3   get_environ_proxies3  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   rT   scheme)r]   proxiesZurlpartsZ
proxy_keysproxyZ	proxy_keyr2   r2   r3   select_proxy?  s    

r   c       	      C   st   |dk	r|ni }| j }t|j}|d}| }|rpt||dspt||d}|||d}|rp||| |S )a  This method takes proxy information from a request and configuration
    input to resolve a mapping of target proxies. This will consider settings
    such a NO_PROXY to strip proxy configurations.

    :param request: Request or PreparedRequest
    :param proxies: A dictionary of schemes or schemes and hosts to proxy URLs
    :param trust_env: Boolean declaring whether to trust environment configs

    :rtype: dict
    Nr   )r   r   )r]   r   r   rT   copyr   r   
setdefault)	Zrequestr   Z	trust_envr]   r   r   Znew_proxiesZenviron_proxiesr   r2   r2   r3   resolve_proxiesY  s    

r   python-requestsc             C   s   |  dt  S )zO
    Return a string representing the default user agent.

    :rtype: str
    rh   )r   )r`   r2   r2   r3   default_user_agentt  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-EncodingZAcceptZ
Connection)r   r   DEFAULT_ACCEPT_ENCODINGr2   r2   r2   r3   default_headers}  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   r]   z<> '"r   )r   r.   r,   r+   r   )	r{   ZlinksZreplace_charsvalr]   r   linkr   r   r2   r2   r3   parse_header_links  s&    
r    rR   r?      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-sigr?   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)dataZsampleZ	nullcountr2   r2   r3   guess_json_utf  s*    
r   c             C   sl   t | }|\}}}}}}}	|j}
|
s.||
 }
}|r@d||
g}
|dkrL|}|dkrXd}t||
|d||	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
    @Nr   )r   r\   ri   r   )r]   Z
new_schemer   r   authr1   r   rV   queryfragmentr\   r2   r2   r3   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   ZusernameZpasswordrB   r   )r]   r   r   r2   r2   r3   get_auth_from_url  s    
r   c             C   sz   | \}}x<| D ]4}t |tkrtd|d|d|dt | qW t|dtt | d  t|dtt | d  d	S )
zVerifies that header parts don't contain leading whitespace
    reserved characters, or return characters.

    :param header: tuple, in the format (name, value).
    zHeader part (z) from {z: z$} must be of type str or bytes, not r`   r   r{   r   N)typer   r   _validate_header_part)r   r`   r{   partr2   r2   r3   check_header_validity  s    
&r  c             C   s"   | | std| d| d S )NzSInvalid leading whitespace, reserved character(s), or returncharacter(s) in header z: )r/   r   )Zheader_partZheader_kindZ	validatorr2   r2   r3   r     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   r   rb   r   )r   rsplitr   )r]   r   r\   rV   r   r   r   r2   r2   r3   urldefragauth  s
    
r  c             C   s\   t | jdd}|dk	rPt| jtrPy|| j W qX tk
rL   tdY qXX 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.)rd   ZbodyrZ   Z_body_positionr   r*   r   )Zprepared_requestZ	body_seekr2   r2   r3   rewind_body/  s    

r  )F)F)N)T)r   )h__doc__r   
contextlibr@   rC   r.   r   r   sysrk   rG   rj   collectionsr   Zurllib3.utilr   r   r   r   r   Z_internal_utilsr   r	   compatr
   r   r   r   r   r   r   r   r   r   r   r   r   r   r   Zcookiesr   
exceptionsr   r   r   r   Z
structuresr   rU   whereZDEFAULT_CA_BUNDLE_PATHZDEFAULT_PORTSri   r,   r   platformr4   r8   rK   r_   rg   rr   contextmanagerrl   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   r   encoder   r   r   r   r   r   r  r   r  r  r2   r2   r2   r3   <module>   s    $	
$	B
9% #

(<


	&
 