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d j o e n d S( s< robotparser.py
Copyright (C) 2000 Bastian Kleineidam
You can choose between two licenses when using this package:
1) GNU GPLv2
2) PSF license for Python 2.2
The robots.txt Exclusion Protocol is implemented as specified in
http://info.webcrawler.com/mak/projects/robots/norobots-rfc.html
Nt RobotFileParseri c C s t o | GHn d S( N( t debugt msg( R ( ( t! /usr/lib/python2.4/robotparser.pyt _debug s c B sb t Z d Z d d Z d Z d Z d Z d Z d Z d Z d Z
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Z RS( ss This class provides a set of methods to read, parse and answer
questions about a single robots.txt file.
t c C s> g | _ d | _ t | _ t | _ | i | d | _ d S( Ni (
t selft entriest Nonet
default_entryt Falset disallow_allt allow_allt set_urlt urlt last_checked( R R ( ( R t __init__ s
c C s | i S( s· Returns the time the robots.txt file was last fetched.
This is useful for long-running web spiders that need to
check for new robots.txt files periodically.
N( R R ( R ( ( R t mtime$ s c C s d k } | i | _ d S( sY Sets the time the robots.txt file was last fetched to the
current time.
N( t timeR R ( R R ( ( R t modified- s c C s/ | | _ t i | d d !\ | _ | _ d S( s, Sets the URL referring to a robots.txt file.i i N( R R t urlparset hostt path( R R ( ( R R
5 s c C sϋ t } | i | i } g } | i } x+ | o# | i | i
| i } q0 W| i | _ | i d j p | i d j o t | _
t d nZ | i d j o t | _ t d n3 | i d j o" | o t d | i | n d S( s4 Reads the robots.txt URL and feeds it to the parser.i i s disallow alli s allow alliΘ s parse linesN( t URLopenert openert openR R t ft linest readlinet linet appendt stript errcodet TrueR R R t parse( R R R R R ( ( R t read: s&
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useragentsR R R R ( R R% ( ( R t
_add_entryN s
c C s« d } d } t } xZ| D]R} | d } | p_ | d j o! t d | t } d } q | d j o | i | t } d } q n | i d } | d j o | | } n | i } | p q n | i d d } t
| d j o_| d i i | d <t i | d i | d <| d d j oS | d j o( t d | | i | t } n | i i | d d } qn| d d j oF | d j o t d
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| | f q W| d j o | i i | n t d t | d S( s parse the input lines from a robots.txt file.
We allow that a user-agent: line is not preceded by
one or more blank lines.i i s] line %d: warning: you should insert allow: or disallow: directives below any user-agent: linei t #t :s
user-agentsP line %d: warning: you should insert a blank line before any user-agent directivet disallowsH line %d: error: you must insert a user-agent: directive before this linet allows line %d: warning: unknown key %ss! line %d: error: malformed line %ss Parsed rules:
%sN( t statet
linenumbert EntryR% R R R R R' t findt iR t splitt lent lowert urllibt unquoteR& R t rulelinest RuleLineR
R! R t str( R R R0 R- R, R% R ( ( R R" U s^
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t i | d p d } x2 | i D]' } | i | o | i | Sqn qn W| i o | i i | Sn t S( s= using the parsed robots.txt decide if useragent can fetch urls= Checking robots.txt allowance for:
user agent: %s
url: %si t /N( R t useragentR R R R
R R! R4 t quoteR R5 R R% t
applies_tot allowanceR ( R R: R R% ( ( R t can_fetch s
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c C s2 d } x% | i D] } | t | d } q W| S( NR s
( t retR R R% R8 ( R R% R? ( ( R t __str__ͺ s
( t __name__t
__module__t __doc__R R R R
R# R' R" R> R@ ( ( ( R R s @ R7 c B s) t Z d Z d Z d Z d Z RS( so A rule line is a single "Allow:" (allowance==True) or "Disallow:"
(allowance==False) followed by a path.c C s> | d j o | o
t } n t i | | _ | | _ d S( NR ( R R= R! R4 R; R ( R R R= ( ( R R ΄ s
c C s | i d j p | i | i S( NR$ ( R R t filenamet
startswith( R RD ( ( R R< » s c C s | i o d p d d | i S( Nt Allowt Disallows : ( R R= R ( R ( ( R R@ Ύ s ( RA RB RC R R< R@ ( ( ( R R7 ± s R. c B s2 t Z d Z d Z d Z d Z d Z RS( s? An entry has one or more user-agents and zero or more rulelinesc C s g | _ g | _ d S( N( R R& R6 ( R ( ( R R Δ s c C sX d } x# | i D] } | d | d } q Wx% | i D] } | t | d } q6 W| S( NR s User-agent: s
( R? R R& t agentR6 R R8 ( R R RH R? ( ( R R@ Θ s
c C sg | i d d i } xG | i D]< } | d j o t Sn | i } | | j o t Sq# q# Wt S( s2 check if this entry applies to the specified agentR9 i R$ N( R: R1 R3 R R& RH R! R
( R R: RH ( ( R R< Π s
c C sO xH | i D]= } t | t | | i f | i | o | i Sq
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Wt S( sZ Preconditions:
- our agent applies to this entry
- filename is URL decodedN( R R6 R R RD R8 R= R< R! ( R RD R ( ( R R= έ s
( RA RB RC R R@ R< R= ( ( ( R R. Β s
R c B s t Z d Z d Z RS( Nc G s t i i | | d | _ d S( NiΘ ( R4 t FancyURLopenerR R t argsR ( R RJ ( ( R R θ s c C s( | | _ t i i | | | | | | S( N( R R R4 RI t http_error_defaultR t fpt errmsgt headers( R R RL R RM RN ( ( R RK μ s ( RA RB R RK ( ( ( R R η s c C s; | p
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access denieds access allowedt faileds ok (%s)( t bt act a( RR RP RQ ( ( R t _checkρ s
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d d t | i d d d t | i d
d d t | i d d d t | i d d d t | i d d d t | i d d d t | i d d d | i d | i t | i d d d d S( Ni s" http://www.musi-cal.com/robots.txtR$ s http://www.musi-cal.com/R i t CherryPickerSEs? http://www.musi-cal.com/cgi-bin/event-search?city=San+Franciscos CherryPickerSE/1.0s CherryPickerSE/1.5t ExtractorPros http://www.musi-cal.com/blubbat extractorpros toolpak/1.1t spams http://www.musi-cal.com/searchs# http://www.musi-cal.com/Musician/mes http://www.lycos.com/robots.txtt Mozillas http://www.lycos.com/search( R t rpR R
R# RS R> ( RY ( ( R t _testό s4
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