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Edit File: urllib2.pyc
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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$parole') proxy_support = urllib2.ProxyHandler({"http" : "http://ahad-haam:3128"}) # build a new opener that adds authentication and caching FTP handlers opener = urllib2.build_opener(proxy_support, authinfo, urllib2.CacheFTPHandler) # install it urllib2.install_opener(opener) f = urllib2.urlopen('http://www.python.org/') i����N( t StringIO( t unwrapt unquotet splittypet splithostt quotet addinfourlt splitportt splittagt toBytest splitattrt ftpwrappert splitusert splitpasswdt splitvalue( t localhostt url2pathnamet getproxiest proxy_bypassi c C s� | s | s | r� | d k r- t d � � n t sB t d � � n t j d t j j d | d | � } t d | � } t | � } nF | r� t d | � } t | � } n" t d k r� t � a } n t } | j | | | � S( NsD You can't pass both context and any of cafile, capath, and cadefaults SSL support not availablet purposet cafilet capatht context( t Nonet ValueErrort _have_sslt sslt create_default_contextt Purposet SERVER_AUTHt HTTPSHandlert build_openert _openert open( t urlt datat timeoutR R t cadefaultR t https_handlert opener( ( s /usr/lib/python2.7/urllib2.pyt urlopen� s$ c C s | a d S( N( R ( R' ( ( s /usr/lib/python2.7/urllib2.pyt install_opener� s t URLErrorc B s e Z d � Z d � Z RS( c C s | f | _ | | _ d S( N( t argst reason( t selfR, ( ( s /usr/lib/python2.7/urllib2.pyt __init__� s c C s d | j S( Ns <urlopen error %s>( R, ( R- ( ( s /usr/lib/python2.7/urllib2.pyt __str__� s ( t __name__t __module__R. 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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') R� s //s proxy URL with no authority: %ri i����N( R R� R R R� R R ( t proxyt schemet r_schemet authorityt endt userinfot hostportt usert password( ( s /usr/lib/python2.7/urllib2.pyt _parse_proxy� s 2 R� c B s# e Z d Z d d � Z d � Z RS( id c C s� | d k r t � } n t | d � s3 t d � � | | _ x= | j � D]/ \ } } t | d | | | | j d � � qI Wd S( Nt has_keys proxies must be a mappings %s_openc S s | | | | � S( N( ( t rR� RJ R� ( ( s /usr/lib/python2.7/urllib2.pyt <lambda>� s ( R R R� t AssertionErrort proxiesRN t setattrR� ( R- R RJ R" ( ( s /usr/lib/python2.7/urllib2.pyR. � s c C s� | j � } t | � \ } } } } | d k r9 | } n | j rU t | j � rU d S| r� | r� d t | � t | � f } t j | � j � } | j d d | � n t | � } | j | | � | | k s� | d k r� d S| j j | d | j �Sd S( Ns %s:%ss Proxy-authorizations Basic Rf R$ ( Rc R� R RE R R t base64t b64encodet stripRO Rg R� R! 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