Editing: 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$parole') proxy_support = urllib2.ProxyHandler({"http" : "http://ahad-haam:3128"}) # build a new opener that adds authentication and caching FTP handlers opener = urllib2.build_opener(proxy_support, authinfo, urllib2.CacheFTPHandler) # install it urllib2.install_opener(opener) f = urllib2.urlopen('http://www.python.org/') i����N( t StringIO( t unwrapt unquotet splittypet splithostt quotet addinfourlt splitportt splittagt toBytest splitattrt ftpwrappert splitusert splitpasswdt splitvalue( t localhostt url2pathnamet getproxiest proxy_bypassi c C s� | s | s | r� | d k r- t d � � n t sB t d � � n t j d t j j d | d | � } t d | � } t | � } nF | r� t d | � } t | � } n" t d k r� t � a } n t } | j | | | � S( NsD You can't pass both context and any of cafile, capath, and cadefaults SSL support not availablet purposet cafilet capatht context( t Nonet ValueErrort _have_sslt sslt create_default_contextt Purposet SERVER_AUTHt HTTPSHandlert build_openert _openert open( t urlt datat timeoutR R t cadefaultR t https_handlert opener( ( s /usr/lib64/python2.7/urllib2.pyt urlopen� s$ 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. 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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 typeRE t portt _tunnel_hostR# t headerst itemst add_headert unredirected_hdrsRF t origin_req_hostt unverifiable( R- R" R# RM RQ RR t keyt value( ( s /usr/lib64/python2.7/urllib2.pyR. � s c C s< | d k r/ t | d | d � � | j | St | � d S( Nt _Request__r_typet _Request__r_hostt get_i ( RU RV ( t getattrt __dict__t AttributeError( R- t attr( ( s /usr/lib64/python2.7/urllib2.pyt __getattr__� s c C s | j � r d Sd Sd S( Nt POSTt GET( t has_data( R- ( ( s /usr/lib64/python2.7/urllib2.pyt get_method s c C s | | _ d S( N( R# ( R- R# ( ( s /usr/lib64/python2.7/urllib2.pyt add_data s c C s | j d k S( N( R# R ( R- ( ( s /usr/lib64/python2.7/urllib2.pyR_ s c C s | j S( N( R# ( R- ( ( s /usr/lib64/python2.7/urllib2.pyt get_data s c C s( | j r d | j | j f S| j Sd S( Ns %s#%s( RI RH ( R- ( ( s /usr/lib64/python2.7/urllib2.pyR> s c C sV | j d k rO t | j � \ | _ | _ | j d k rO t d | j � qO n | j S( Ns unknown url type: %s( RJ R R RH RU R ( R- ( ( s /usr/lib64/python2.7/urllib2.pyt get_type s c C sR | j d k rK t | j � \ | _ | _ | j rK t | j � | _ qK n | j S( N( RE R R RU RV R ( R- ( ( s /usr/lib64/python2.7/urllib2.pyt get_host s c C s | j S( N( RV ( R- ( ( s /usr/lib64/python2.7/urllib2.pyt get_selector% s c C sJ | j d k r( | j r( | j | _ n | | _ | j | _ | | _ d S( Nt https( RJ RL RE RH RV ( R- RE RJ ( ( s /usr/lib64/python2.7/urllib2.pyt set_proxy( s c C s | j | j k S( N( RV RH ( R- ( ( s /usr/lib64/python2.7/urllib2.pyt has_proxy1 s c C s | j S( N( RQ ( R- ( ( s /usr/lib64/python2.7/urllib2.pyt get_origin_req_host4 s c C s | j S( N( RR ( R- ( ( s /usr/lib64/python2.7/urllib2.pyt is_unverifiable7 s c C s | | j | j � <d S( N( RM t capitalize( R- RS t val( ( s /usr/lib64/python2.7/urllib2.pyRO : s c C s | | j | j � <d S( N( RP Rk ( R- RS Rl ( ( s /usr/lib64/python2.7/urllib2.pyt add_unredirected_header> s c C s | | j k p | | j k S( N( RM RP ( R- t header_name( ( s /usr/lib64/python2.7/urllib2.pyt has_headerB s c C s" | j j | | j j | | � � S( N( RM t getRP ( R- Rn t default( ( s /usr/lib64/python2.7/urllib2.pyR@ F s c C s) | j j � } | j | j � | j � S( N( RP t copyt updateRM RN ( R- R5 ( ( s /usr/lib64/python2.7/urllib2.pyt header_itemsK s N( R0 R1 R t FalseR. 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R� R� R� R t sockett _GLOBAL_DEFAULT_TIMEOUTR! R� R� ( ( ( s /usr/lib64/python2.7/urllib2.pyRv P s / c sR d d l � � f d � } t � } t t t t t t t t g } t t d � ra | j t � n t � } xl | D]d } x[ | D]S } | | � r� t | | � r� | j | � q� q~ t | | � r~ | j | � q~ q~ Wqq Wx | D] } | j | � q� Wx | D] } | j | � � q� Wx3 | D]+ } | | � r=| � } n | j | � q W| S( s+ Create an opener object from a list of handlers. The opener will use several default handlers, including support for HTTP, FTP and when applicable, HTTPS. 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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( RC ( t .0t kt v( ( s /usr/lib64/python2.7/urllib2.pys <genexpr>J s RM RQ RR N( i- i. i/ i3 ( R^ R� ( i- i. i/ ( R` t replaceR� RM RN RG Ri R� R2 R> ( R- R� R6 R3 R4 RM t newurlt mt newheaders( ( s /usr/lib64/python2.7/urllib2.pyR� 6 s c C s d | k r" | j d � d } n& d | k rD | j d � d } n d St j | � } | j r� | j r� t | � } d | d <n t j | � } t j | j � | � } | j � } | j d � p� | j d � p� | j d � st | | | d | | | � � n | j | | | | | | � } | d k r4d St | d � r�| j } | _ | j | d � | j k s�t | � | 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 netloct listt urlunparset urljoinR> RC R� R2 R� R R� R� Rp t max_repeatst lent max_redirectionst inf_msgt readR� R� 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/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� RJ R� ( ( s /usr/lib64/python2.7/urllib2.pyt <lambda>� s ( R R R� t AssertionErrort proxiesRN t setattrR� ( R- R RJ R" ( ( s /usr/lib64/python2.7/urllib2.pyR. � s c C s | j � } t | � \ } } } } | d k r9 | } n | j � | j r_ t | j � r_ 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 Rd RE R R t base64t b64encodet stripRO Rg R� R! 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R R R� R R ( ( ( s /usr/lib64/python2.7/urllib2.pyR s t HTTPPasswordMgrWithDefaultRealmc B s e Z d � Z RS( c C sD t j | | | � \ } } | d k r1 | | f St j | d | � S( N( R R R ( R- R R R� R� ( ( s /usr/lib64/python2.7/urllib2.pyR N s ( R0 R1 R ( ( ( s /usr/lib64/python2.7/urllib2.pyR# L s t AbstractBasicAuthHandlerc B s; e Z e j d e j � Z d d � Z d � Z d � Z RS( s5 (?:[^,]*,)*[ ]*([^ ,]+)[ ]+realm=(["']?)([^"']*)\2c C s4 | d k r t � } n | | _ | j j | _ d S( N( R R R R ( R- t password_mgr( ( s /usr/lib64/python2.7/urllib2.pyR. d s c C s� | j | d � } | r� t j j | � } | r� | j � \ } } } | d k rg t j d t d � n | j � d k r� | j | | | � Sq� n d S( Nt "t 's Basic Auth Realm was unquotedi t basic( R& R' ( Rp R R$ t rxt searcht groupst warningst warnt UserWarningRC t retry_http_basic_auth( R- t authreqRE R� RM t moR� R R ( ( s /usr/lib64/python2.7/urllib2.pyt http_error_auth_reqedk s c C s� | j j | | � \ } } | d k r� d | | f } d t j | � j � } | j | j d � | k ro d S| j | j | � | j j | d | j �Sd Sd S( Ns %s:%ss Basic %sR$ ( R R R R R R R@ t auth_headerRm R� R! R$ ( R- RE R� R R� t pwt rawt auth( ( s /usr/lib64/python2.7/urllib2.pyR/ { s N( R0 R1 t ret compilet IR) R R. R2 R/ ( ( ( s /usr/lib64/python2.7/urllib2.pyR$ V s t HTTPBasicAuthHandlerc B s e Z d Z d � Z RS( t Authorizationc C s( | j � } | j d | | | � } | S( Ns www-authenticate( R> R2 ( R- R� R6 R3 R4 RM R" R� ( ( s /usr/lib64/python2.7/urllib2.pyt http_error_401� s ( R0 R1 R3 R< ( ( ( s /usr/lib64/python2.7/urllib2.pyR: � s t ProxyBasicAuthHandlerc B s e Z d Z d � Z RS( s Proxy-authorizationc C s( | j � } | j d | | | � } | S( Ns proxy-authenticate( Rd R2 ( R- R� R6 R3 R4 RM R� R� ( ( s /usr/lib64/python2.7/urllib2.pyt http_error_407� s ( R0 R1 R3 R> ( ( ( s /usr/lib64/python2.7/urllib2.pyR= � s c C s} t j j d � r; t d � } | j | � } | j � | Sg t | � D] } t t j d d � � ^ qH } d j | � Sd S( s Return n random bytes.s /dev/urandomi i R< N( t osR� t existsR! 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