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See the following document for more info on URLs:
"Names and Addresses, URIs, URLs, URNs, URCs", at
http://www.w3.org/pub/WWW/Addressing/Overview.html
See also the HTTP spec (from which the error codes are derived):
"HTTP - Hypertext Transfer Protocol", at
http://www.w3.org/pub/WWW/Protocols/
Related standards and specs:
- RFC1808: the "relative URL" spec. (authoritative status)
- RFC1738 - the "URL standard". (authoritative status)
- RFC1630 - the "URI spec". (informational status)
The object returned by URLopener().open(file) will differ per
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c C s d S( Ni ( ( t x( ( s+ /opt/alt/python27/lib64/python2.7/urllib.pyt _is_unicode s c C s
t | t � S( N( R� t unicode( RK ( ( s+ /opt/alt/python27/lib64/python2.7/urllib.pyRL s c C sT t | � rP y | j d � } WqP t k
rL t d t | � d � � qP Xn | S( s toBytes(u"URL") --> 'URL'.t ASCIIs URL s contains non-ASCII characters( RL t encodet UnicodeErrort repr( R( ( ( s+ /opt/alt/python27/lib64/python2.7/urllib.pyRU ! s
c C si | j � } | d d k rB | d d k rB | d d !j � } n | d d k re | d j � } n | S( s8 unwrap('<URL:type://host/path>') --> 'type://host/path'.i t <i����t >i s URL:( R� ( R( ( ( s+ /opt/alt/python27/lib64/python2.7/urllib.pyR - s c C sv t d k r* d d l } | j d � a n t j | � } | rl | j d � } | j � | t | � d f Sd | f S( s: splittype('type:opaquestring') --> 'type', 'opaquestring'.i����Ns
^([^/:]+):i ( t _typeprogR% R� t compileR t groupR� Ru ( R( R� R R ( ( s+ /opt/alt/python27/lib64/python2.7/urllib.pyR 6 s c C s� t d k r$ t j d t j � a n t j | � } | r� | j d � } | j d � } | rz | j d � rz d | } n | | f Sd | f S( s; splithost('//host[:port]/path') --> 'host[:port]', '/path'.s //([^/#?]*)(.*)i i R� N( t _hostprogR% R� RU t DOTALLR RV R� ( R( R t host_portRo ( ( s+ /opt/alt/python27/lib64/python2.7/urllib.pyR D s
c C sY t d k r* d d l } | j d � a n t j | � } | rO | j d d � Sd | f S( sJ splituser('user[:passwd]@host[:port]') --> 'user[:passwd]', 'host[:port]'.i����Ns ^(.*)@(.*)$i i ( t _userprogR% R� RU R RV ( Rf R� R ( ( s+ /opt/alt/python27/lib64/python2.7/urllib.pyR T s c C s_ t d k r0 d d l } | j d | j � a n t j | � } | rU | j d d � S| d f S( s/ splitpasswd('user:passwd') -> 'user', 'passwd'.i����Ns ^([^:]*):(.*)$i i ( t _passwdprogR% R� RU t SR RV ( R� R� R ( ( s+ /opt/alt/python27/lib64/python2.7/urllib.pyR ` s c C sn t d k r* d d l } | j d � a n t j | � } | rd | j � \ } } | rd | | f Sn | d f S( s* splitport('host:port') --> 'host', 'port'.i����Ns ^(.*):([0-9]*)$( t _portprogR% R� RU R R ( Rf R� R R� ( ( s+ /opt/alt/python27/lib64/python2.7/urllib.pyR m s
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r� d } n X| | f Sn | | f S( s� Split host and port, returning numeric port.
Return given default port if no ':' found; defaults to -1.
Return numerical port if a valid number are found after ':'.
Return None if ':' but not a valid number.i����Ns ^(.*):(.*)$i i ( t
_nportprogR% R� RU R RV Rs R� ( Rf t defportR� R R� t nport( ( s+ /opt/alt/python27/lib64/python2.7/urllib.pyR | s
c C sY t d k r* d d l } | j d � a n t j | � } | rO | j d d � S| d f S( s/ splitquery('/path?query') --> '/path', 'query'.i����Ns ^(.*)\?([^?]*)$i i ( t
_queryprogR% R� RU R RV ( R( R� R ( ( s+ /opt/alt/python27/lib64/python2.7/urllib.pyR � s c C sY t d k r* d d l } | j d � a n t j | � } | rO | j d d � S| d f S( s) splittag('/path#tag') --> '/path', 'tag'.i����Ns ^(.*)#([^#]*)$i i ( t _tagprogR% R� RU R RV ( R( R� R ( ( s+ /opt/alt/python27/lib64/python2.7/urllib.pyR
� s c C s! | j d � } | d | d f S( sk splitattr('/path;attr1=value1;attr2=value2;...') ->
'/path', ['attr1=value1', 'attr2=value2', ...].R� i i ( R� ( R( t words( ( s+ /opt/alt/python27/lib64/python2.7/urllib.pyR � s c C sY t d k r* d d l } | j d � a n t j | � } | rO | j d d � S| d f S( s- splitvalue('attr=value') --> 'attr', 'value'.i����Ns ^([^=]*)=(.*)$i i ( t
_valueprogR% R� RU R RV ( R� R� R ( ( s+ /opt/alt/python27/lib64/python2.7/urllib.pyR � s t 0123456789ABCDEFabcdefc c s? | ]5 } t D]( } | | t t | | d � � f Vq
q d S( i N( t _hexdigt chrRs ( t .0R� t b( ( s+ /opt/alt/python27/lib64/python2.7/urllib.pys <genexpr>� s s ([ -]+)c C sO t | � r� d | k r | St j | � } | d g } | j } xU t d t | � d � D]; } | t t | | � � j d � � | | | d � qZ Wd j | � S| j d � } t | � d k r� | S| d g } | j } x^ | d D]R } y$ | t
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r=| d � | | � q� Xq� Wd j | � S( s" unquote('abc%20def') -> 'abc def'.t %i i i t latin1Rk ( RL t _asciireR� RM t rangeRu R R� t decodeR� t _hextochrt KeyError( t st bitst resRM R� t item( ( s+ /opt/alt/python27/lib64/python2.7/urllib.pyR � s.
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c C s | j d d � } t | � S( s% unquote('%7e/abc+def') -> '~/abc def't +t ( RX R ( Rq ( ( s+ /opt/alt/python27/lib64/python2.7/urllib.pyR � s sA ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_.-i i� s %{:02X}R� c C s� | s% | d k r! t d � � n | S| t f } y t | \ } } Wnf t k
r� t j � } | j g | D] } | | f ^ qn � | j } t | } | | f t | <n X| j | � s� | Sd j
t | | � � S( s quote('abc def') -> 'abc%20def'
Each part of a URL, e.g. the path info, the query, etc., has a
different set of reserved characters that must be quoted.
RFC 2396 Uniform Resource Identifiers (URI): Generic Syntax lists
the following reserved characters.
reserved = ";" | "/" | "?" | ":" | "@" | "&" | "=" | "+" |
"$" | ","
Each of these characters is reserved in some component of a URL,
but not necessarily in all of them.
By default, the quote function is intended for quoting the path
section of a URL. Thus, it will not encode '/'. This character
is reserved, but in typical usage the quote function is being
called on a path where the existing slash characters are used as
reserved characters.
s None object cannot be quotedRk N( R% t TypeErrort always_safeR/ Rp t _safe_mapt copyt updatet __getitem__t rstripR� t map( Rq RP t cachekeyt quotert safe_mapt c( ( s+ /opt/alt/python27/lib64/python2.7/urllib.pyR � s
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Rk c C s< d | k r/ t | | d � } | j d d � St | | � S( s9 Quote the query fragment of a URL; replacing ' ' with '+'Rv Ru ( R RX ( Rq RP ( ( s+ /opt/alt/python27/lib64/python2.7/urllib.pyR s i c C s� t | d � r | j � } nb y- t | � rJ t | d t � rJ t � n Wn2 t k
r t j � \ } } } t d | � n Xg } | s� xc| D]E \ } } t t | � � } t t | � � } | j
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| � S( sv Encode a sequence of two-element tuples or dictionary into a URL query string.
If any values in the query arg are sequences and doseq is true, each
sequence element is converted to a separate parameter.
If the query arg is a sequence of two-element tuples, the order of the
parameters in the output will match the order of parameters in the
input.
t itemsi s1 not a valid non-string sequence or mapping objectR� RN RX t &( R> R� Ru R� t tupleRw R^ R_ R R� RM RL RO R� ( t queryt doseqt tyt vat tbt lR� R� t elt( ( s+ /opt/alt/python27/lib64/python2.7/urllib.pyR
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)c C s� i } xP t j j � D]? \ } } | j � } | r | d d k r | | | d <q q Wd t j k r{ | j d d � n xg t j j � D]V \ } } | d d k r� | j � } | r� | | | d <q� | j | d d � q� q� W| S( s� Return a dictionary of scheme -> proxy server URL mappings.
Scan the environment for variables named <scheme>_proxy;
this seems to be the standard convention. In order to prefer lowercase
variables, we process the environment in two passes, first matches any
and second matches only lower case proxies.
If you need a different way, you can pass a proxies dictionary to the
[Fancy]URLopener constructor.
i����t _proxyt REQUEST_METHODR� N( RD t environR� R� t popR% ( R" Rh R� ( ( s+ /opt/alt/python27/lib64/python2.7/urllib.pyt getproxies_environment[ s c C s� | d k r t � } n y | d } Wn t k
r: d SX| d k rK d St | � \ } } g | j d � D] } | j � ^ qm } xs | D]k } | r� | j d � } t j | � } d | } t j | | t j
� s� t j | | t j
� r� d Sq� q� Wd S( s� Test if proxies should not be used for a particular host.
Checks the proxies dict for the value of no_proxy, which should be a
list of comma separated DNS suffixes, or '*' for all hosts.
t noi t *i R� t .s
(.+\.)?%s$N( R% R� Rp R R� R� t lstripR� t escapeR R� ( Rf R" t no_proxyt hostonlyR� Rd t
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C s� d d l } d d l } d d l m } t | � \ } } d � } t � } d | k ri | d ri t Sn d } x'| j d d
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Return True iff this host shouldn't be accessed using a proxy
This function uses the MacOSX framework SystemConfiguration
to fetch the proxy information.
i����N( t fnmatchc S sy | j d � } t t | � } t | � d k rM | d d d d g d } n | d d >| d d >B| d d >B| d BS(
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exceptionss (\d+(?:\.\d+)*)(/\d+)?i i i i ( ( R� R\ R� R R� R� R% R@ R R� R] RV t countRs R8 (
Rf R� R\ R� R� R� R� t proxy_settingst hostIPR� t mt baset mask( ( s+ /opt/alt/python27/lib64/python2.7/urllib.pyt proxy_bypass_macosx_sysconf� s@
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c C s t � S( s� Return a dictionary of scheme -> proxy server URL mappings.
This function uses the MacOSX framework SystemConfiguration
to fetch the proxy information.
( R� ( ( ( s+ /opt/alt/python27/lib64/python2.7/urllib.pyt getproxies_macosx_sysconf� s c C s* t � } | r t | | � St | � Sd S( s� Return True, if a host should be bypassed.
Checks proxy settings gathered from the environment, if specified, or
from the MacOSX framework SystemConfiguration.
N( R� R� R� ( Rf R" ( ( s+ /opt/alt/python27/lib64/python2.7/urllib.pyR� � s
c C s t � p t � S( N( R� R� ( ( ( s+ /opt/alt/python27/lib64/python2.7/urllib.pyR � s c C sm i } y d d l } Wn t k
r* | SXy!| j | j d � } | j | d � d } | rAt | j | d � d � } d | k r� x� | j d � D]Y } | j d d � \ } } d d l } | j d
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k r| | d <qAd | | d <d | | d <d | | d <n | j � Wn t
t t f k
rhn X| S( sx Return a dictionary of scheme -> proxy server URL mappings.
Win32 uses the registry to store proxies.
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