ACC SHELL
| Path : /usr/lib/python/ |
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| Current File : //usr/lib/python/urllib2.pyc |
o Mc @ s d Z d d k Z d d k Z d d k Z d d k Z d d k Z d d k Z d d k Z d d k Z d d k Z d d k
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Z- d Z. d dC d YZ/ d dD d YZ0 d Z1 d dE d YZ2 d e2 f d YZ3 d e2 f d YZ4 d e2 f d YZ5 d Z6 d e2 f d YZ7 d dF d YZ8 d! e8 f d" YZ9 d# dG d$ YZ: d% e: e2 f d& YZ; d' e: e2 f d( YZ< d) Z= d* dH d+ YZ> d, e2 e> f d- YZ? d. e2 e> f d/ YZ@ d0 e2 f d1 YZA d2 eA f d3 YZB eC e d4 o d5 eA f d6 YZD n d7 e2 f d8 YZE d9 e2 f d: YZF d; ZG d< ZH d= e2 f d> YZI d? e2 f d@ YZJ dA eJ f dB YZK d S(I s! An extensible library for opening URLs using a variety of protocols
The simplest way to use this module is to call the urlopen function,
which accepts a string containing a URL or a Request object (described
below). It opens the URL and returns the results as file-like
object; the returned object has some extra methods described below.
The OpenerDirector manages a collection of Handler objects that do
all the actual work. Each Handler implements a particular protocol or
option. The OpenerDirector is a composite object that invokes the
Handlers needed to open the requested URL. For example, the
HTTPHandler performs HTTP GET and POST requests and deals with
non-error returns. The HTTPRedirectHandler automatically deals with
HTTP 301, 302, 303 and 307 redirect errors, and the HTTPDigestAuthHandler
deals with digest authentication.
urlopen(url, data=None) -- Basic usage is the same as original
urllib. pass the url and optionally data to post to an HTTP URL, and
get a file-like object back. One difference is that you can also pass
a Request instance instead of URL. Raises a URLError (subclass of
IOError); for HTTP errors, raises an HTTPError, which can also be
treated as a valid response.
build_opener -- Function that creates a new OpenerDirector instance.
Will install the default handlers. Accepts one or more Handlers as
arguments, either instances or Handler classes that it will
instantiate. If one of the argument is a subclass of the default
handler, the argument will be installed instead of the default.
install_opener -- Installs a new opener as the default opener.
objects of interest:
OpenerDirector -- Sets up the User Agent as the Python-urllib client and manages
the Handler classes, while dealing with requests and responses.
Request -- An object that encapsulates the state of a request. The
state can be as simple as the URL. It can also include extra HTTP
headers, e.g. a User-Agent.
BaseHandler --
exceptions:
URLError -- A subclass of IOError, individual protocols have their own
specific subclass.
HTTPError -- Also a valid HTTP response, so you can treat an HTTP error
as an exceptional event or valid response.
internals:
BaseHandler and parent
_call_chain conventions
Example usage:
import urllib2
# set up authentication info
authinfo = urllib2.HTTPBasicAuthHandler()
authinfo.add_password(realm='PDQ Application',
uri='https://mahler:8092/site-updates.py',
user='klem',
passwd='geheim$parole')
proxy_support = urllib2.ProxyHandler({"http" : "http://ahad-haam:3128"})
# build a new opener that adds authentication and caching FTP handlers
opener = urllib2.build_opener(proxy_support, authinfo, urllib2.CacheFTPHandler)
# install it
urllib2.install_opener(opener)
f = urllib2.urlopen('http://www.python.org/')
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s :\d+$c C sa | i } t i | d } | d j o | i d d } n t i d | d } | i S( s Return request-host, as defined by RFC 2965.
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This is called by the http_error_30x methods when a
redirection response is received. If a redirection should
take place, return a new Request to allow http_error_30x to
perform the redirect. Otherwise, raise HTTPError if no-one
else should try to handle this url. Return None if you can't
but another Handler might.
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d } n | d | !} t | \ } } | d j o t | \ } } n d } } | | | | f S( s3 Return (scheme, user, password, host/port) given a URL or an authority.
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have two slashes after the scheme:
>>> _parse_proxy('file:/ftp.example.com/')
Traceback (most recent call last):
ValueError: proxy URL with no authority: 'file:/ftp.example.com/'
The first three items of the returned tuple may be None.
Examples of authority parsing:
>>> _parse_proxy('proxy.example.com')
(None, None, None, 'proxy.example.com')
>>> _parse_proxy('proxy.example.com:3128')
(None, None, None, 'proxy.example.com:3128')
The authority component may optionally include userinfo (assumed to be
username:password):
>>> _parse_proxy('joe:password@proxy.example.com')
(None, 'joe', 'password', 'proxy.example.com')
>>> _parse_proxy('joe:password@proxy.example.com:3128')
(None, 'joe', 'password', 'proxy.example.com:3128')
Same examples, but with URLs instead:
>>> _parse_proxy('http://proxy.example.com/')
('http', None, None, 'proxy.example.com')
>>> _parse_proxy('http://proxy.example.com:3128/')
('http', None, None, 'proxy.example.com:3128')
>>> _parse_proxy('http://joe:password@proxy.example.com/')
('http', 'joe', 'password', 'proxy.example.com')
>>> _parse_proxy('http://joe:password@proxy.example.com:3128')
('http', 'joe', 'password', 'proxy.example.com:3128')
Everything after the authority is ignored:
>>> _parse_proxy('ftp://joe:password@proxy.example.com/rubbish:3128')
('ftp', 'joe', 'password', 'proxy.example.com')
Test for no trailing '/' case:
>>> _parse_proxy('http://joe:password@proxy.example.com')
('http', 'joe', 'password', 'proxy.example.com')
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