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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
protocol. All you know is that is has methods read(), readline(),
readlines(), fileno(), close() and info(). The read*(), fileno()
and close() methods work like those of open files.
The info() method returns a mimetools.Message object which can be
used to query various info about the object, if available.
(mimetools.Message objects are queried with the getheader() method.)
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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 5 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� Rs ( R( R� R� R ( ( s+ /opt/alt/python27/lib64/python2.7/urllib.pyR > 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� RT t DOTALLR� RU R� ( R( R� t host_portRm ( ( s+ /opt/alt/python27/lib64/python2.7/urllib.pyR L 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 ^(.*)@(.*)$i i ( t _userprogR% R� RT R� RU ( Re R� R� ( ( s+ /opt/alt/python27/lib64/python2.7/urllib.pyR \ s c C s_ t d k r0 d d l } | j d | j � a n t j | � } | rU | j d d � S| d f S( s/ splitpasswd('user:passwd') -> 'user', 'passwd'.i����Ns ^([^:]*):(.*)$i i ( t _passwdprogR% R� RT t SR� RU ( R� R� R� ( ( s+ /opt/alt/python27/lib64/python2.7/urllib.pyR h 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]*)$( t _portprogR% R� RT R� R� ( Re R� R� R� ( ( s+ /opt/alt/python27/lib64/python2.7/urllib.pyR u s
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'/path', ['attr1=value1', 'attr2=value2', ...].R� i i ( R� ( R( t words( ( s+ /opt/alt/python27/lib64/python2.7/urllib.pyR � s c C sY t d k r* d d l } | j d � a n t j | � } | rO | j d d � S| d f S( s- splitvalue('attr=value') --> 'attr', 'value'.i����Ns ^([^=]*)=(.*)$i i ( t
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c C s | j d d � } t | � S( s% unquote('%7e/abc+def') -> '~/abc def't +t ( RV R ( Rp ( ( 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
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t | | � � S( s quote('abc def') -> 'abc%20def'
Each part of a URL, e.g. the path info, the query, etc., has a
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RFC 2396 Uniform Resource Identifiers (URI): Generic Syntax lists
the following reserved characters.
reserved = ";" | "/" | "?" | ":" | "@" | "&" | "=" | "+" |
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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 quotedRj N( R% t TypeErrort always_safeR/ Ro t _safe_mapt copyt updatet __getitem__t rstripR� t map( Rp RM t cachekeyt quotert safe_mapt c( ( s+ /opt/alt/python27/lib64/python2.7/urllib.pyR � s
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Rj c C s< d | k r/ t | | d � } | j d d � St | | � S( s9 Quote the query fragment of a URL; replacing ' ' with '+'Ru Rt ( R RV ( Rp RM ( ( 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
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| � S( sv Encode a sequence of two-element tuples or dictionary into a URL query string.
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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.
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i����t _proxyt REQUEST_METHODR� N( RA t environR� R� t popR% ( R" Rg R� ( ( s+ /opt/alt/python27/lib64/python2.7/urllib.pyt getproxies_environmentc s c C s� | d k r t � } n y | d } Wn t k
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� r� d Sq� q� Wd S( s� Test if proxies should not be used for a particular host.
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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.
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c C s t � S( s� Return a dictionary of scheme -> proxy server URL mappings.
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( 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
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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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