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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)quoteurlparsebytesstrunquote
getproxies proxy_bypass
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integer_typesis_py3proxy_bypass_environmentgetproxies_environmentMapping)cookiejar_from_dict)CaseInsensitiveDict)
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r7 c C s t rt| S t| S dS )zReturn True, if the host should be bypassed.
Checks proxy settings gathered from the environment, if specified,
or the registry.
N)r r r7 )r3 r5 r5 r6 r W s r c C s t | dr| j } | S )z/Returns an internal sequence dictionary update.items)hasattrr8 )dr5 r5 r6 dict_to_sequencec s
r; c C s2 d }d}t | dr t| }nbt | dr.| j}nPt | dr~y | j }W n tjk
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Nr __len__lenfilenoba% 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.tellseek )r9 r= r> ioUnsupportedOperationosfstatst_sizemodewarningswarnr r@ r- IOErrorrA max)o total_lengthcurrent_positionr> r5 r5 r6 super_lenl s@
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rh c C sB t | dd}|r>t|tr>|d dkr>|d dkr>tjj|S dS )z0Tries to guess the filename of the given object.nameNr )getattrr[ r rE rV basename)objri r5 r5 r6 guess_filename s rp c C s t jj| r| S t jj| \}}x4|rTt jj| rTt jj|\}}dj||g}q"W tj|sd| S tj|}||j kr~| S t j
}t jj|f|jd }t jj|s|j ||d}|S )zReplace nonexistent paths that look like they refer to a member of a zip
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gettempdirextract)rV archivememberprefixzip_filetmpextracted_pathr5 r5 r6 extract_zipped_paths s
r c C s. | dkr dS t | ttttfr&tdt| 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)r[ r r
boolr+
ValueErrorr )valuer5 r5 r6 from_key_val_list s
r c C s@ | dkr dS t | ttttfr&tdt | tr8| 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) r[ r r
r r+ r r r8 list)r r5 r5 r6 to_key_val_list s
r c C s\ g }xRt | D ]F}|dd |dd ko4dkn rJt|dd }|j| qW |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 "rl rl )_parse_list_headerunquote_header_valueappend)r resultitemr5 r5 r6 parse_list_header= s (r c C s| i }xrt | D ]f}d|kr$d||< q|jdd\}} | dd | dd koVdkn rlt| dd } | ||< qW |S )a^ Parse lists of key, value pairs as described by RFC 2068 Section 2 and
convert them into a python dict:
>>> d = parse_dict_header('foo="is a fish", bar="as well"')
>>> type(d) is dict
True
>>> sorted(d.items())
[('bar', 'as well'), ('foo', 'is a fish')]
If there is no value for a key it will be `None`:
>>> parse_dict_header('key_without_value')
{'key_without_value': None}
To create a header from the :class:`dict` again, use the
:func:`dump_header` function.
:param value: a string with a dict header.
:return: :class:`dict`
:rtype: dict
=Nr r rl rl )r r. r )r r r ri r5 r5 r6 parse_dict_header] s ( r c C s^ | rZ| d | d ko dkn rZ| dd
} | sF| dd dkrZ| j ddj ddS | S ) zUnquotes a header value. (Reversal of :func:`quote_header_value`).
This does not use the real unquoting but what browsers are actually
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$ 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 ri )cj cookie_dictcookier5 r5 r6 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.
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)r )r r r5 r5 r6 add_dict_to_cookiejar s r c C sT t jdt tjdtjd}tjdtjd}tjd}|j| |j| |j| S )zlReturns encodings from given content string.
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charset_re pragma_rexml_rer5 r5 r6 get_encodings_from_content s
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C s | j d}|d j |dd }}i }d}xh|D ]`}|j }|r2|d }}|jd} | dkr|d| j|}|| d d j|}|||j < q2W ||fS ) zReturns content type and parameters from given header
:param header: string
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parameters
r" r r Nz"' Tr rl )r. stripfindlower)
headertokens content_typeparams params_dictitems_to_stripparamkeyr index_of_equalsr5 r5 r6 _parse_content_type_header s
r c C sD | j d}|sdS t|\}}d|kr4|d jdS d|kr@dS dS )z}Returns encodings from given HTTP Header Dict.
:param headers: dictionary to extract encoding from.
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rp | jS X dS )zReturns the requested content back in unicode.
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:rtype: str
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rI rJ r r r r r UnicodeErrorr TypeError)r tried_encodingsr r5 r5 r6 get_unicode_from_response s
r Z4ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzz0123456789-._~c
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rt td| Y nX |tkr||| dd ||< qd|| ||< qd|| ||< qW dj |S ) zUn-escape any percent-escape sequences in a URI that are unreserved
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:rtype: str
%r r rB z%Invalid percent-escape sequence: '%s'N )
r. ranger= isalnumchrr+ r r UNRESERVED_SETrr )uripartsihcr5 r5 r6 unquote_unreserved: s
r c C s: d}d}yt t| |dS tk
r4 t | |dS X dS )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_percentsafe_without_percentr5 r5 r6 requote_uriR s r c C sl t jdtj| d }|jd\}}t jdtjtt|d }t jdtj|d |@ }||@ ||@ kS )zThis function allows you to check if an IP belongs to a network subnet
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returns False if ip = 192.168.1.1 and net = 192.168.100.0/24
:rtype: bool
z=Lr rq )structunpacksocket inet_atonr. dotted_netmaskr+ )ipnetipaddrnetaddrbitsnetmasknetworkr5 r5 r6 address_in_networkh s
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Example: if mask is 24 function returns 255.255.255.0
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|t j| < X dS )zSet the environment variable 'env_name' to 'value'
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the environment variable 'env_name'.
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c S s t jj| pt jj| j S )N)rE r r upper)kr5 r5 r6 s z'should_bypass_proxies..Nno_proxyTc s s | ]}|r|V qd S )Nr5 ).0r3 r5 r5 r6 s z(should_bypass_proxies.. r ,z:{}F)r hostnamer/ r. r r r portrX endswithr r r r gaierror) r` r get_proxy no_proxy_argparsedproxy_iphost_with_portr3 bypassr5 r5 r6 should_bypass_proxies s<
r c C s t | |dri S t S dS )zA
Return a dict of environment proxies.
:rtype: dict
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)r` r r5 r5 r6 get_environ_proxies s r c C sv |pi }t | }|jdkr.|j|j|jdS |jd |j |jd|j dg}d}x |D ]}||krX|| }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
Nallz://zall://)r r r scheme)r` proxiesurlparts
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r c C s g }d}| j |} | s|S xtjd| D ]}y|jdd\}}W n tk
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i.e. Link: ; rel=front; type="image/jpeg",; rel=back;type="image/jpeg"
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r rT rB c C s | dd }|t jt jfkr dS |dd t jkr6dS |dd t jt jfkrRdS |jt}|dkrhd S |dkr|ddd tkrd
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r) c C s8 t | |\}}}}}}|s$|| }}t||||||fS )zGiven a URL that may or may not have a scheme, prepend the given scheme.
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r- c C sB t | }yt|jt|jf}W n ttfk
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username,password.
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r1 s ^\S[^\r\n]*$|^$z^\S[^\r\n]*$|^$c C sf | \}}t |trt}nt}y|j|s4td| W n* tk
r` td||t|f Y nX dS )zVerifies that header value is a string which doesn't contain
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:param header: tuple, in the format (name, value).
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_CLEAN_HEADER_REGEX_BYTE_CLEAN_HEADER_REGEX_STRr1 r r type)r ri r patr5 r5 r6 check_header_validity s
r6 c C sF t | \}}}}}}|s"|| }}|jddd }t|||||dfS )zW
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r9 c C s` t | jdd}|dk rTt| jtrTy|| j W q\ ttfk
rP tdY q\X ntddS )zfMove file pointer back to its recorded starting position
so it can be read again on redirect.
rA Nz;An error occurred when rewinding request body for redirect.z+Unable to rewind request body for redirect.)rm bodyr[ _body_positionr rK r- r )prepared_request body_seekr5 r5 r6 rewind_body s r> )r r )F)FzBABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-._~)N)r )b__doc__r
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