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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$parole') proxy_support = urllib2.ProxyHandler({"http" : "http://ahad-haam:3128"}) # build a new opener that adds authentication and caching FTP handlers opener = urllib2.build_opener(proxy_support, authinfo, urllib2.CacheFTPHandler) # install it urllib2.install_opener(opener) f = urllib2.urlopen('http://www.python.org/') i����N( t StringIO( t unwrapt unquotet splittypet splithostt quotet addinfourlt splitportt splittagt toBytest splitattrt ftpwrappert splitusert splitpasswdt splitvalue( t localhostt url2pathnamet getproxiest proxy_bypassi c C s� | s | s | r� | d k r- t d � � n t sB t d � � n t j d t j d | d | � } t d | d t � } t | � } nF | r� t d | � } t | � } n" t d k r� t � a } n t } | j | | | � S( NsD You can't pass both context and any of cafile, capath, and cadefaults SSL support not availablet cert_reqst cafilet capatht contextt check_hostname( t Nonet ValueErrort _have_sslt sslt _create_stdlib_contextt CERT_REQUIREDt HTTPSHandlert Truet build_openert _openert open( t urlt datat timeoutR R t cadefaultR t https_handlert opener( ( s /usr/lib64/python2.7/urllib2.pyt urlopen� s$ c C s | a d S( N( R! ( R( ( ( s /usr/lib64/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/lib64/python2.7/urllib2.pyt __init__� s c C s d | j S( Ns <urlopen error %s>( R- ( R. ( ( s /usr/lib64/python2.7/urllib2.pyt __str__� s ( t __name__t __module__R/ R0 ( ( ( s /usr/lib64/python2.7/urllib2.pyR+ � s t HTTPErrorc B sA e Z d Z e j Z d � Z d � Z e d � � Z d � Z RS( sB Raised when HTTP error occurs, but also acts like non-error returnc C sV | | _ | | _ | | _ | | _ | | _ | d k rR | j | | | | � n d S( N( t codet msgt hdrst fpt filenameR t _HTTPError__super_init( R. R# R4 R5 R6 R7 ( ( s /usr/lib64/python2.7/urllib2.pyR/ � s c C s d | j | j f S( Ns HTTP Error %s: %s( R4 R5 ( R. ( ( s /usr/lib64/python2.7/urllib2.pyR0 � s c C s | j S( N( R5 ( R. ( ( s /usr/lib64/python2.7/urllib2.pyR- � s c C s | j S( N( R6 ( R. ( ( s /usr/lib64/python2.7/urllib2.pyt info� s ( R1 R2 t __doc__R R/ R9 R0 t propertyR- R: ( ( ( s /usr/lib64/python2.7/urllib2.pyR3 � s s :\d+$c C s_ | j � } t j | � d } | d k r@ | j d d � } n t j d | d � } | j � S( s� Return request-host, as defined by RFC 2965. Variation from RFC: returned value is lowercased, for convenient comparison. i t t Host( t get_full_urlt urlparset get_headert _cut_port_ret subt lower( t requestR# t host( ( s /usr/lib64/python2.7/urllib2.pyt request_host� s t Requestc B s� e Z d i d e d � Z d � Z d � Z d � Z d � Z d � Z d � Z d � Z d � Z d � Z d � Z d � Z d � Z d � Z d � Z d � Z d � Z d d � Z d � Z RS( c C s� t | � | _ t | j � \ | _ | _ d | _ d | _ d | _ d | _ | | _ i | _ x* | j � D] \ } } | j | | � qm Wi | _ | d k r� t | � } n | | _ | | _ d S( N( R t _Request__originalR t _Request__fragmentR t typeRF t portt _tunnel_hostR$ t headerst itemst add_headert unredirected_hdrsRG t origin_req_hostt unverifiable( R. 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Re Rg Rh Rj Rk Rl Rm RP Rp Rr RA Rw ( ( ( s /usr/lib64/python2.7/urllib2.pyRH � s( t OpenerDirectorc B sS e Z d � Z d � Z d � Z d � Z d e j d � Z d d � Z d � Z RS( c C sM d t } d | f g | _ g | _ i | _ i | _ i | _ i | _ d S( Ns Python-urllib/%ss User-agent( t __version__t addheaderst handlerst handle_opent handle_errort process_responset process_request( R. t client_version( ( s /usr/lib64/python2.7/urllib2.pyR/ S s c C s� t | d � s( t d t | � � � n t } xet | � D]W} | d k rS q; n | j d � } | | } | | d } | j d � r� | j d � | d } | | d } y t | � } Wn t k r� n X| j j | i � } | | j | <n] | d k r| } | j } n? | d k r3| } | j } n! | d k r; | } | j } n q; | j | g � } | rt j | | � n | j | � t } q; W| r�t j | j | � | j | � n d S( Nt add_parents% expected BaseHandler instance, got %rt redirect_requestt do_opent proxy_opent _i t errorR" t responseRE ( s redirect_requests do_opens proxy_open( RX t TypeErrorRK Rx t dirt findt startswitht intR R~ Rs R} R R� t setdefaultt bisectt insortt appendR R| R� ( R. t handlert addedt metht it protocolt conditiont jt kindt lookupR| ( ( s /usr/lib64/python2.7/urllib2.pyt add_handler^ sJ c C s d S( N( ( R. 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If any of the handlers passed as arguments are subclasses of the default handlers, the default handlers will not be used. i����Nc s t | � j t f � S( N( R� t ClassTypeRK ( t obj( t types( s /usr/lib64/python2.7/urllib2.pyt isclass� s t HTTPS( R� Ry t ProxyHandlert UnknownHandlert HTTPHandlert HTTPDefaultErrorHandlert HTTPRedirectHandlert FTPHandlert FileHandlert HTTPErrorProcessorRX t httplibR� R t sett issubclasst addR� t removeR� ( R| R� R( t default_classest skipt klasst checkt h( ( R� s /usr/lib64/python2.7/urllib2.pyR � s2 t BaseHandlerc B s) e Z d Z d � Z d � Z d � Z RS( i� c C s | | _ d S( N( t parent( R. R� ( ( s /usr/lib64/python2.7/urllib2.pyR� s c C s d S( N( ( R. ( ( s /usr/lib64/python2.7/urllib2.pyR� s c C s# t | d � s t S| j | j k S( Nt handler_order( RX R R� ( R. t other( ( s /usr/lib64/python2.7/urllib2.pyt __lt__ s ( R1 R2 R� R� R� R� ( ( ( s /usr/lib64/python2.7/urllib2.pyR� s R� c B s# e Z d Z d Z d � Z e Z RS( s Process HTTP error responses.i� c C sd | j | j | j � } } } d | k o7 d k n s` | j j d | | | | | � } n | S( Ni� i, R� ( R4 R5 R: R� R� ( R. RE R� R4 R5 R6 ( ( s /usr/lib64/python2.7/urllib2.pyt http_response s ( R1 R2 R; R� R� t https_response( ( ( s /usr/lib64/python2.7/urllib2.pyR� s R� c B s e Z d � Z RS( c C s" t | j � | | | | � � d S( N( R3 R? ( R. R� R7 R4 R5 R6 ( ( s /usr/lib64/python2.7/urllib2.pyR� - s ( R1 R2 R� ( ( ( s /usr/lib64/python2.7/urllib2.pyR� , s R� c B s: e Z d Z d Z d � Z d � Z e Z Z Z d Z RS( i i c C s� | j � } | d k r$ | d k s< | d k r� | d k r� | j d d � } t d � | j j � D� � } t | d | d | j � d t �St | j � | | | | � � d S( s� Return a Request or None in response to a redirect. 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. i- i. i/ i3 R_ t HEADR^ t s %20c s s3 | ]) \ } } | j � d k r | | f Vq d S( s content-lengths content-typeN( s content-lengths content-type( RD ( t .0t kt v( ( s /usr/lib64/python2.7/urllib2.pys <genexpr>L s RN RR RS N( i- i. i/ i3 ( s GETR� ( i- i. i/ ( Ra t replaceR� RN RO RH Rl R R3 R? ( R. R� R7 R4 R5 RN t newurlt mt newheaders( ( s /usr/lib64/python2.7/urllib2.pyR� 8 s c C s� d | k r" | j d � d } n& d | k rD | j d � d } n d St j | � } | j sy t | � } d | d <n t j | � } t j | j � | � } | j � } | j d � p� | j d � p� | j d � s� t | | | d | | | � � n | j | | | | | | � } | d k r*d St | d � r�| j } | _ | j | d � | j k syt | � | j k r�t | j � | | j | | | � � q�n i } | _ | _ | j | d � d | | <| j � | j � | j j | d | j �S( Nt locationi t urit /i s http://s https://s ftp://s) - Redirection to url '%s' is not allowedt redirect_dicti R% ( t getheadersR@ t patht listt urlunparset urljoinR? RD R� R3 R� R RX R� Rs t max_repeatst lent max_redirectionst inf_msgt readR� R� R" R% ( R. R� R7 R4 R5 RN R� t urlpartst newurl_lowert newt visited( ( s /usr/lib64/python2.7/urllib2.pyt http_error_302Z sB so The HTTP server returned a redirect error that would lead to an infinite loop. The last 30x error message was: ( R1 R2 R� R� R� R� t http_error_301t http_error_303t http_error_307R� ( ( ( s /usr/lib64/python2.7/urllib2.pyR� 0 s " 8c C s� t | � \ } } | j d � s0 d } | } nV | j d � sR t d | � � n | j d d � } | d k ry d } n | d | !} t | � \ } } | d k r� t | � \ } } n d } } | | | | f S( s3 Return (scheme, user, password, host/port) given a URL or an authority. If a URL is supplied, it must have an authority (host:port) component. According to RFC 3986, having an authority component means the URL must 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') 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/lib64/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� RK R� ( ( s /usr/lib64/python2.7/urllib2.pyt <lambda>� s ( R R RX t AssertionErrort proxiesRO t setattrR� ( R. 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