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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
iÿÿÿÿNt RobotFileParserc B sb e 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 | ƒ d | _ d S( Ni ( t entriest Nonet
default_entryt Falset disallow_allt allow_allt set_urlt last_checked( t selft url( ( s! /usr/lib/python2.6/robotparser.pyt __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.
( R ( R
( ( s! /usr/lib/python2.6/robotparser.pyt mtime s c C s d d k } | i ƒ | _ d S( sY Sets the time the robots.txt file was last fetched to the
current time.
iÿÿÿÿN( t timeR ( R
R ( ( s! /usr/lib/python2.6/robotparser.pyt modified) s c C s/ | | _ t i | ƒ d d !\ | _ | _ d S( s, Sets the URL referring to a robots.txt file.i i N( R t urlparset hostt path( R
R ( ( s! /usr/lib/python2.6/robotparser.pyR 1 s c C s¾ t ƒ } | i | i ƒ } g } | D] } | | i ƒ q& ~ } | i ƒ | i | _ | i d j o
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t | _ n) | i d j o | o | i | ƒ n d S( s4 Reads the robots.txt URL and feeds it to the parser.i‘ i“ i iÈ N( i‘ i“ (
t URLopenert openR t stript closet errcodet TrueR R t parse( R
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useragentsR R t append( R
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_add_entryD s
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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 i t #t :s
user-agentt disallowt allowN( t EntryR$ t findR t splitt lent lowert urllibt unquoteR! R" t rulelinest RuleLineR R R ( R
R t statet
linenumberR# R t i( ( s! /usr/lib/python2.6/robotparser.pyR K sP
c C s› | i o t S| i o t St i t i t i | ƒ ƒ d ƒ p d } x/ | i D]$ } | i | ƒ o | i
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| ƒ St S( s= using the parsed robots.txt decide if useragent can fetch urli t /( R R R R R. t quoteR R/ R t
applies_tot allowanceR ( R
t useragentR R# ( ( s! /usr/lib/python2.6/robotparser.pyt can_fetch~ s
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R R# ( ( s! /usr/lib/python2.6/robotparser.pyt __str__‘ s ( t __name__t
__module__t __doc__R R
R R R R$ R R: R= ( ( ( s! /usr/lib/python2.6/robotparser.pyR s 3 R1 c B s) e 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 | ƒ | _ | | _ d S( NR ( R R. R6 R R8 ( R
R R8 ( ( s! /usr/lib/python2.6/robotparser.pyR ˜ s
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startswith( R
t filename( ( s! /usr/lib/python2.6/robotparser.pyR7 Ÿ s c C s | i o d p d d | i S( Nt Allowt Disallows : ( R8 R ( R
( ( s! /usr/lib/python2.6/robotparser.pyR= ¢ s ( R> R? R@ R R7 R= ( ( ( s! /usr/lib/python2.6/robotparser.pyR1 • s R) c B s2 e 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! R0 ( R
( ( s! /usr/lib/python2.6/robotparser.pyR ¨ s c C sj g } x' | i D] } | i d | d g ƒ q Wx* | i D] } | i t | ƒ d g ƒ q: Wd i | ƒ S( Ns User-agent: s
R ( R! t extendR0 R< R; ( R
t rett agentR ( ( s! /usr/lib/python2.6/robotparser.pyR= ¬ s
c C sa | i d ƒ d i ƒ } xA | i D]6 } | d j o t S| i ƒ } | | j o t Sq# Wt S( s2 check if this entry applies to the specified agentR5 i R ( R+ R- R! R R ( R
R9 RG ( ( s! /usr/lib/python2.6/robotparser.pyR7 ´ s
c C s0 x) | i D] } | i | ƒ o | i Sq
Wt S( sZ Preconditions:
- our agent applies to this entry
- filename is URL decoded( R0 R7 R8 R ( R
RB R ( ( s! /usr/lib/python2.6/robotparser.pyR8 Á s
( R> R? R@ R R= R7 R8 ( ( ( s! /usr/lib/python2.6/robotparser.pyR) ¦ s
R c B s# e Z d „ Z d „ Z d „ Z RS( c G s t i i | | Œ d | _ d S( NiÈ ( R. t FancyURLopenerR R ( R
t args( ( s! /usr/lib/python2.6/robotparser.pyR Ë s c C s d S( N( NN( R ( R
R t realm( ( s! /usr/lib/python2.6/robotparser.pyt prompt_user_passwdÏ s c C s( | | _ t i i | | | | | | ƒ S( N( R R. RH t http_error_default( R
R t fpR t errmsgt headers( ( s! /usr/lib/python2.6/robotparser.pyRL Ô s ( R> R? R RK RL ( ( ( s! /usr/lib/python2.6/robotparser.pyR Ê s ( ( ( ( R@ R R. t __all__R R1 R) RH R ( ( ( s! /usr/lib/python2.6/robotparser.pyt <module> s ƒ$