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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 s} t d j ol d d k } y d d k l } Wn# t j
o d d k l } n X| i | d a t i i n t S( s) Return an empty mimetools.Message object.iN( R i ( t
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R c B s; e Z d Z d Z d Z d Z d Z d Z RS( s; Class used by open_ftp() for cache of open FTP connections.c C s; | | _ | | _ | | _ | | _ | | _ | i d S( N( R R R_ R R t init( R1 R R R_ R R ( ( s" /usr/local/lib/python2.5/urllib.pyR/ F s c C s~ d d k } d | _ | i | _ | i i | i | i | i i | i | i x! | i
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t | d i d | i | d f S( NiR R s TYPE Ai s TYPE i s RETR i t 550s ftp errori s LIST t LISTRI ( R R ( R t endtransferR t voidcmdR R R# t ntransfercmdt
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( R3 R4 R R/ R R R% RA ( ( ( s" /usr/local/lib/python2.5/urllib.pyR C s t addbasec B s) e Z d Z d Z d Z d Z RS( s( Base class for addinfo and addclosehook.c C s | | _ | i i | _ | i i | _ t | i d o | i i | _ n t | i d o | i i | _ n
d | _ t | i d o9 | i i | _ t | i d o | i i | _ q n d S( Nt readlinest filenoc S s d S( N( R# ( ( ( s" /usr/local/lib/python2.5/urllib.pyt <lambda> s t __iter__t next( R[ Rm t readlineRQ R1 R2 R4 R5 ( R1 R[ ( ( s" /usr/local/lib/python2.5/urllib.pyR/ s c C s d | i i t | | i f S( Ns <%s at %r whose fp = %r>( t __class__R3 t idR[ ( R1 ( ( s" /usr/local/lib/python2.5/urllib.pyt __repr__ s c C sL d | _ d | _ d | _ d | _ | i o | i i n d | _ d S( N( R# Rm R6 R1 R2 R[ RA ( R1 ( ( s" /usr/local/lib/python2.5/urllib.pyRA s
( R3 R4 R R/ R9 RA ( ( ( s" /usr/local/lib/python2.5/urllib.pyR0 s R) c B s e Z d Z d Z d Z RS( s* Class to add a close hook to an open file.c G s& t i | | | | _ | | _ d S( N( R0 R/ t closehookt hookargs( R1 R[ R: R; ( ( s" /usr/local/lib/python2.5/urllib.pyR/ s c C sA t i | | i o& | i | i d | _ d | _ n d S( N( R0 RA R: R; R# ( R1 ( ( s" /usr/local/lib/python2.5/urllib.pyRA s
( R3 R4 R R/ RA ( ( ( s" /usr/local/lib/python2.5/urllib.pyR) s t addinfoc B s e Z d Z d Z d Z RS( s. class to add an info() method to an open file.c C s t i | | | | _ d S( N( R0 R/ RZ ( R1 R[ RZ ( ( s" /usr/local/lib/python2.5/urllib.pyR/ s c C s | i S( N( RZ ( R1 ( ( s" /usr/local/lib/python2.5/urllib.pyRf s ( R3 R4 R R/ Rf ( ( ( s" /usr/local/lib/python2.5/urllib.pyR< s RN c B s) e Z d Z d Z d Z d Z RS( s9 class to add info() and geturl() methods to an open file.c C s& t i | | | | _ | | _ d S( N( R0 R/ RZ R& ( R1 R[ RZ R& ( ( s" /usr/local/lib/python2.5/urllib.pyR/ s c C s | i S( N( RZ ( R1 ( ( s" /usr/local/lib/python2.5/urllib.pyRf s c C s | i S( N( R& ( R1 ( ( s" /usr/local/lib/python2.5/urllib.pyt geturl s ( R3 R4 R R/ Rf R= ( ( ( s" /usr/local/lib/python2.5/urllib.pyRN s c C s d S( Ni ( ( t x( ( s" /usr/local/lib/python2.5/urllib.pyt _is_unicode s c C s
t | t S( N( R t unicode( R> ( ( s" /usr/local/lib/python2.5/urllib.pyR? s c C sX t | oG y | i d } WqT t j
o! t d t | d qT Xn | S( s toBytes(u"URL") --> 'URL'.t ASCIIs URL s contains non-ASCII characters( R? t encodet UnicodeErrort repr( R& ( ( s" /usr/local/lib/python2.5/urllib.pyRM s
c C sn | i } | d d j o( | d d j o | d d !i } n | d d j o | d i } n | S( s8 unwrap('<URL:type://host/path>') --> 'type://host/path'.i t <it >i s URL:( R ( R& ( ( s" /usr/local/lib/python2.5/urllib.pyR s " c C s} t d j o d d k } | i d a n t i | } | o1 | i d } | i | t | d f Sn d | f S( s: splittype('type:opaquestring') --> 'type', 'opaquestring'.iNs
^([^/:]+):i ( t _typeprogR# R t compileR t groupR Rn ( R& R R R ( ( s" /usr/local/lib/python2.5/urllib.pyR s
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c C si t d j o d d k } | i d a n t i | } | o t t | i d d Sn d | f S( sJ splituser('user[:passwd]@host[:port]') --> 'user[:passwd]', 'host[:port]'.iNs ^(.*)@(.*)$i i ( t _userprogR# R RH R t mapR RI ( R_ R R ( ( s" /usr/local/lib/python2.5/urllib.pyR s
c C s` t d j o d d k } | i d a n t i | } | o | i d d Sn | d f S( s/ splitpasswd('user:passwd') -> 'user', 'passwd'.iNs ^([^:]*):(.*)$i i ( t _passwdprogR# R RH R RI ( R R R ( ( s" /usr/local/lib/python2.5/urllib.pyR s
c C s` t d j o d d k } | i d a n t i | } | o | i d d Sn | d f S( s* splitport('host:port') --> 'host', 'port'.iNs ^(.*):([0-9]+)$i i ( t _portprogR# R RH R RI ( R_ R R ( ( s" /usr/local/lib/python2.5/urllib.pyR + s
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d } n X| | f Sn | | f S( s Split host and port, returning numeric port.
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c C s` t d j o d d k } | i d a n t i | } | o | i d d Sn | d f S( s) splittag('/path#tag') --> '/path', 'tag'.iNs ^(.*)#([^#]*)$i i ( t _tagprogR# R RH R RI ( R& R R ( ( s" /usr/local/lib/python2.5/urllib.pyR
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'/path', ['attr1=value1', 'attr2=value2', ...].R i i ( R ( R& t words( ( s" /usr/local/lib/python2.5/urllib.pyR d s c C s` t d j o d d k } | i d a n t i | } | o | i d d Sn | d f S( s- splitvalue('attr=value') --> 'attr', 'value'.iNs ^([^=]*)=(.*)$i i ( t
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c C s? | d d j o$ | d d !o | d | d f Sn d | f S( s2 splitgophertype('/Xselector') --> 'X', 'selector'.i R i N( R# ( R` ( ( s" /usr/local/lib/python2.5/urllib.pyR v s c c s) x" | ] } d | t | f Vq Wd S( s %02xN( t chr( t .0R ( ( s" /usr/local/lib/python2.5/urllib.pys <genexpr>| s i c c s) x" | ] } d | t | f Vq Wd S( s %02XN( RV ( RW R ( ( s" /usr/local/lib/python2.5/urllib.pys <genexpr>} s c C s | i d } x t d t | D] } | | } y t | d | d | | <Wq% t j
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of | t 7} h } xB t d D]4 } t | } | | j o | p d | | | <qH W| t | <n Xt | i | } d i | 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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but not necessarily in all of them.
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section of a URL. Thus, it will not encode '/'. This character
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called on a path where the existing slash characters are used as
reserved characters.
i s %%%02XRd ( t always_safet _safemapsR[ t rangeRV RL t __getitem__R ( R^ R t cachekeyt safe_mapR t cR_ ( ( s" /usr/local/lib/python2.5/urllib.pyR s
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| S( sv Encode a sequence of two-element tuples or dictionary into a URL query string.
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If the query arg is a sequence of two-element tuples, the order of the
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t itemsi s1 not a valid non-string sequence or mapping objectR RA RP t &( RQ Rj Rn R t tuplet TypeErrorRW RX R R RF R? RB R (
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this seems to be the standard convention. If you need a
different way, you can pass a proxies dictionary to the
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it _proxy( R; t environRj R ( R" Ra R ( ( s" /usr/local/lib/python2.5/urllib.pyt getproxies_environment s t darwinc
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o q Xd | | d <n | S( s Return a dictionary of scheme -> proxy server URL mappings.
By convention the mac uses Internet Config to store
proxies. An HTTP proxy, for instance, is stored under
the HttpProxy key.
iNt UseHTTPProxyt
HTTPProxyHosts http://%sR{ ( t icR t ICRV ( Rz t configR" R ( ( s" /usr/local/lib/python2.5/urllib.pyt getproxies_internetconfig s c C s d S( Ni ( ( R> ( ( s" /usr/local/lib/python2.5/urllib.pyR . s c C s t p t S( N( Rv R} ( ( ( s" /usr/local/lib/python2.5/urllib.pyR 1 s c C sn h } y d d k } Wn t j
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or the registry.
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GHd Sqq qq W| o& | d j o t n t | n2 | p d GHn x | D] } t | i GqWd S( Nii t ths Use -h for helpi s -ts -hs& Usage: python urllib.py [-t] [url ...]s -t runs self-test;s' otherwise, contents of urls are printed( t getoptRW t argvRV R R R Rm ( R RW t optsRG Rb t tt oR R& ( ( s" /usr/local/lib/python2.5/urllib.pyt main s4 #
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