3
d                 @   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 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/ dvZ0ej1 Z2dddZ3dj4ej5deddd Z6ej7dkrndd Z8dd Zdd Z9d d! Z:dwd#d$Z;d%d& Z<d'd( Z=ej>d)d* Z?d+d, Z@d-d. ZAd/d0 ZBd1d2 ZCdxd3d4ZDd5d6 ZEd7d8 ZFd9d: ZGd;d< ZHd=d> ZId?d@ ZJdAdB ZKdCdD ZLeMdyZNdGdH ZOdIdJ ZPdKdL ZQdMdN ZRdOdP ZSdQdR ZTej>dSdT ZUdUdV ZVdzdWdXZWdYdZ ZXd{d[d\ZYd|d^d_ZZd`da Z[dbdc Z\ddj]deZ^e^df Z_e^dg Z`dhdi Zadjdk Zbdldm ZcejddnZeejddoZfdpdq Zgdrds Zhdtdu ZidS )}z
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   )__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.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|jd}t|j|dd }|j|dd }W n tk
rz   dS X | s| rdS |j	d}xX|D ]P}|dkrd| krd	S |j
dd
}|j
dd}|j
dd}tj|| 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 r8   2/tmp/pip-build-7vycvbft/requests/requests/utils.pyproxy_bypass_registry7   s8    


r:   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   r:   )r6   r8   r8   r9   r   ^   s    r   c             C   s   t | dr| j } | S )z/Returns an internal sequence dictionary update.items)hasattrr;   )dr8   r8   r9   dict_to_sequencej   s    
r>   c             C   s6  d }d}t | drt| }nft | dr.| j}nTt | dry| j }W n tjtfk
r^   Y n$X tj|j}d| j	krt
jdt t | dry| j }W n$ ttfk
r   |d k	r|}Y n\X t | do|d kry&| jdd	 | j }| j|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@   rA   ioUnsupportedOperationAttributeErrorosfstatst_sizemodewarningswarnr   rC   r0   IOErrorrD   max)ototal_lengthcurrent_positionrA   r8   r8   r9   	super_lens   s@    







rT   Fc             C   s>  t jjd}|dk	r|f}ndd tD }yddlm}m} d}xD|D ]<}yt jj|}W n tk
rn   dS X t jj	|rF|}P qFW |dkrdS t
| }	d}
t| tr|
jd}
|	jj|
d }y6||j|}|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 j |V  qdS )z~/{}N)format).0fr8   r8   r9   	<genexpr>   s    z!get_netrc_auth.<locals>.<genexpr>r   )netrcNetrcParseError   :asciir   rE   )rI   environgetNETRC_FILESrY   rZ   path
expanduserKeyErrorexistsr   
isinstancer   decodenetlocr1   authenticatorsrO   r+   rH   )urlraise_errorsZ
netrc_fileZnetrc_locationsrY   rZ   
netrc_pathrW   locrisplitstrr6   r   login_ir8   r8   r9   get_netrc_auth   s@    


ro   c             C   sB   t | dd}|r>t|tr>|d dkr>|d dkr>tjj|S dS )z0Tries to guess the filename of the given object.nameNr   <r   >)getattrrd   r   rI   r`   basename)objrp   r8   r8   r9   guess_filename   s    rw   c          
   C   s   t jj| r| S t jj| \}}x:|rZt jj| rZt jj|\}}|sJP dj||g}q"W tj|sj| S tj|}||j kr| S t	j
 }t jj||jdd }t jj|st|}|j|j| 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.
    /r   Nrs   )rI   r`   rc   r1   joinzipfile
is_zipfileZipFilenamelisttempfile
gettempdiratomic_openwriteread)r`   archivememberprefixZzip_filetmpZextracted_pathZfile_handlerr8   r8   r9   extract_zipped_paths   s&    


r   c             c   s   t jd dkrtjntj}tjtjj| d\}}y,tj	|d}|V  W dQ R X |||  W n  t
k
r~   tj|  Y nX dS )z-Write a file to the disk in an atomic fashionr   rE   )dirwbN)sysversion_inforI   renamer2   r~   mkstempr`   dirnamefdopenBaseExceptionremove)filenameZreplacerZtmp_descriptorZtmp_nameZtmp_handlerr8   r8   r9   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)rd   r   r   boolr.   
ValueErrorr   )valuer8   r8   r9   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| j } 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)	rd   r   r   r   r.   r   r   r;   list)r   r8   r8   r9   to_key_val_listB  s    
r   c             C   s\   g }xRt | D ]F}|dd |dd   ko4dkn  rJt|dd }|j| 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   "rs   rs   )_parse_list_headerunquote_header_valueappend)r   resultitemr8   r8   r9   parse_list_header`  s    (r   c             C   s|   i }xrt | D ]f}d|kr$d||< q|jdd\}} | dd | dd   koVdkn  rlt| 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   r   rs   rs   )r   r1   r   )r   r   r   rp   r8   r8   r9   parse_dict_header  s    (r   c             C   s^   | rZ| d | d	   kodkn  rZ| dd
 } | sF| dd dkrZ| j ddj 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   r   r   NrE   z\\\z\"rs   rs   )r2   )r   is_filenamer8   r8   r9   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   rp   )cjcookie_dictcookier8   r8   r9   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   r8   r8   r9   add_dict_to_cookiejar  s    r   c             C   sT   t jdt tjdtjd}tjdtjd}tjd}|j| |j|  |j|  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=["\']*(.+?)["\'>])rM   rN   DeprecationWarningr3   compiler5   findall)content
charset_re	pragma_rexml_rer8   r8   r9   get_encodings_from_content  s    
r   c       
      C   s   | j d}|d j |dd  }}i }d}xh|D ]`}|j }|r2|d }}|jd}	|	dkr|d|	 j|}||	d d j|}|||j < 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   rs   )r1   stripfindlower)
headertokenscontent_typeparamsZparams_dictZitems_to_stripparamkeyr   Zindex_of_equalsr8   r8   r9   _parse_content_type_header  s    



r   c             C   sP   | j d}|sdS t|\}}d|kr4|d j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   r8   r8   r9   get_encoding_from_headers  s    
r   c             c   sr   |j dkr"x| D ]
}|V  qW dS tj|j dd}x | D ]}|j|}|r:|V  q:W |jddd}|rn|V  dS )zStream decodes a iterator.Nr2   )errors    T)final)encodingcodecsgetincrementaldecoderre   )iteratorrr   decoderchunkrvr8   r8   r9   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posr8   r8   r9   iter_slices.  s    r   c             C   sv   t jdt g }t| j}|rJyt| j|S  tk
rH   |j| 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.)r2   )r   N)
rM   rN   r   r   r   r   r   UnicodeErrorr   	TypeError)r   tried_encodingsr   r8   r8   r9   get_unicode_from_response8  s    
r   Z4ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzz0123456789-._~c             C   s   | j d}xtdt|D ]}|| dd }t|dkr|j 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j	|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   rE      z%Invalid percent-escape sequence: '%s'N )
r1   ranger@   isalnumchrr.   r   r   UNRESERVED_SETry   )uripartsihcr8   r8   r9   unquote_unreserveda  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_percentr8   r8   r9   requote_uriy  s    r   c             C   sl   t jdtj| d }|jd\}}t jdtjtt|d }t jdtj|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   rx   )structunpacksocket	inet_atonr1   dotted_netmaskr.   )ipnetipaddrnetaddrbitsnetmasknetworkr8   r8   r9   address_in_network  s
    r   c             C   s&   ddd|  > d A }t jtj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   r8   r8   r9   r     s    r   c             C   s*   yt j|  W n t jk
r$   dS X dS )z
    :rtype: bool
    FT)r   r   error)	string_ipr8   r8   r9   is_ipv4_address  s
    r   c             C   s   | j ddkryt| jdd }W n tk
r8   dS X |dk sJ|dkrNdS ytj| j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
    rx   r   Fr   r   T)countr.   r1   r   r   r   r   )string_networkr   r8   r8   r9   is_valid_cidr  s    r   c             c   sT   |dk	}|r"t j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)rI   r]   r^   )env_namer   value_changed	old_valuer8   r8   r9   set_environ  s    


r   c       	      C   s,  dd }|}|dkr|d}t | }|jdkr2dS |rdd |jdd	jd
D }t|jrxz|D ],}t|rt|j|rdS qb|j|krbdS qbW nD|j}|jr|dj|j7 }x&|D ]}|jj	|s|j	|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j| pt jj| j S )N)rI   r]   r^   upper)kr8   r8   r9   <lambda>  s    z'should_bypass_proxies.<locals>.<lambda>Nno_proxyTc             s   s   | ]}|r|V  qd S )Nr8   )rV   r6   r8   r8   r9   rX     s    z(should_bypass_proxies.<locals>.<genexpr> r   ,z:{}F)r   hostnamer2   r1   r   r   r   portrU   endswithr   r   r   r   gaierror)	rh   r  	get_proxyno_proxy_argparsedproxy_ipZhost_with_portr6   bypassr8   r8   r9   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   )rh   r  r8   r8   r9   get_environ_proxies  s    r  c             C   sv   |pi }t | }|jdkr.|j|j|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)rh   proxiesurlparts
proxy_keysproxy	proxy_keyr8   r8   r9   select_proxy+  s    

r  c       	      C   sv   |dk	r|ni }| j }t|j}|jd}|j }|rrt||d rrt||d}|j||jd}|rr|j|| |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  )rh   r   r  r^   copyr  r  
setdefault)	requestr  	trust_envrh   r  r  new_proxiesenviron_proxiesr  r8   r8   r9   resolve_proxiesE  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   )rp   r8   r8   r9   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_ENCODINGr8   r8   r8   r9   default_headersi  s
    r%  c       	      C   s   g }d}| j |} | s|S xtjd| D ]}y|jdd\}}W n tk
r^   |d }}Y nX d|j di}xP|jdD ]B}y|jd\}} W n tk
r   P Y nX | j |||j |< qzW |j| 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   rh   z<> '"r   )r   r3   r1   r   r   )	r   linksreplace_charsvalrh   r   linkr   r   r8   r8   r9   parse_header_linksu  s&    
r*   r\   rE      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 |j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-sigrE   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	nullcountr8   r8   r9   guess_json_utf  s*    
r9  c             C   sl   t | }|\}}}}}}}	|j}
|
s.||
 }
}|r@dj||
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   rf   ry   r   )rh   
new_schemer  r  authr6   r  r`   queryfragmentrf   r8   r8   r9   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   r   usernamepasswordrH   r   )rh   r  r<  r8   r8   r9   get_auth_from_url  s    
rB  s   ^\S[^\r\n]*$|^$z^\S[^\r\n]*$|^$c             C   sf   | \}}t |trt}nt}y|j|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)rd   r   _CLEAN_HEADER_REGEX_BYTE_CLEAN_HEADER_REGEX_STRr4   r   r   type)r   rp   r   patr8   r8   r9   check_header_validity  s    

rG  c             C   sF   t | \}}}}}}|s"|| }}|jddd }t|||||dfS )zW
    Given a url remove the fragment and the authentication part.

    :rtype: str
    r:  r   r   rs   )r   rsplitr   )rh   r  rf   r`   r   r=  r>  r8   r8   r9   urldefragauth  s
    
rI  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.
    rD   Nz;An error occurred when rewinding request body for redirect.z+Unable to rewind request body for redirect.)rt   bodyrd   _body_positionr   rO   r0   r   )prepared_request	body_seekr8   r8   r9   rewind_body  s    rN  )r   r   )F)FzBABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-._~)N)T)r   )j__doc__r   
contextlibrF   rI   r3   r   r   r   r~   rM   rz   collectionsr   Zurllib3.utilr   r   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_PORTSry   r1   r$  platformr:   r>   rT   ro   rw   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%  r*  encoder3  r4  r5  r9  r?  rB  r   rC  rD  rG  rI  rN  r8   r8   r8   r9   <module>	   s   @
'	@
9% #

%=


	&
 

