steve
/
factor
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

spider - better handling of relative links for frames, dont spider things twice

db4
Doug Coleman 2009-04-01 11:08:19 -05:00
parent 393df94d38
commit b35bb10123
1 changed files with 21 additions and 9 deletions
extra/spider

30
extra/spider/spider.factor
View File

@ -4,11 +4,12 @@ USING: accessors fry html.parser html.parser.analyzer
http.client kernel tools.time sets assocs sequences
concurrency.combinators io threads namespaces math multiline
math.parser inspector urls logging combinators.short-circuit
continuations calendar prettyprint dlists deques locals ;
continuations calendar prettyprint dlists deques locals
present ;
IN: spider
TUPLE: spider base count max-count sleep max-depth initial-links
filters spidered todo nonmatching quiet ;
filters spidered todo nonmatching quiet currently-spidering ;
TUPLE: spider-result url depth headers fetch-time parsed-html
links processing-time timestamp ;
@ -25,10 +26,16 @@ TUPLE: unique-deque assoc deque ;
: <unique-deque> ( -- unique-deque )
H{ } clone <dlist> unique-deque boa ;
: url-exists? ( url unique-deque -- ? )
[ url>> ] [ assoc>> ] bi* key? ;
: push-url ( url depth unique-deque -- )
[ <todo-url> ] dip
[ [ [ t ] dip url>> ] [ assoc>> ] bi* set-at ]
[ deque>> push-back ] 2bi ;
[ <todo-url> ] dip 2dup url-exists? [
2drop
] [
[ [ [ t ] dip url>> ] [ assoc>> ] bi* set-at ]
[ deque>> push-back ] 2bi
] if ;
: pop-url ( unique-deque -- todo-url ) deque>> pop-front ;
@ -38,6 +45,7 @@ TUPLE: unique-deque assoc deque ;
>url
spider new
over >>base
over >>currently-spidering
swap 0 <unique-deque> [ push-url ] keep >>todo
<unique-deque> >>nonmatching
0 >>max-depth
@ -71,9 +79,12 @@ TUPLE: unique-deque assoc deque ;
[ add-nonmatching ]
[ tuck [ apply-filters ] 2dip add-todo ] 2bi ;
: url-absolute? ( url -- ? )
present "http://" head? ;
: normalize-hrefs ( links spider -- links' )
[ [ >url ] map ] dip
base>> swap [ derive-url ] with map ;
currently-spidering>> present swap
[ dup url-absolute? [ derive-url ] [ url-append-path >url ] if ] with map ;
: print-spidering ( url depth -- )
"depth: " write number>string write
@ -83,7 +94,7 @@ TUPLE: unique-deque assoc deque ;
f url spider spidered>> set-at
[ url http-get ] benchmark :> fetch-time :> html :> headers
[
html parse-html [ ] [ find-hrefs spider normalize-hrefs ] bi
html parse-html [ ] [ find-all-links spider normalize-hrefs ] bi
] benchmark :> processing-time :> links :> parsed-html
url depth headers fetch-time parsed-html links processing-time
now spider-result boa ;
@ -110,6 +121,7 @@ TUPLE: unique-deque assoc deque ;
} 1&& ;
: setup-next-url ( spider -- spider url depth )
dup todo>> peek-url url>> present >>currently-spidering
dup todo>> pop-url [ url>> ] [ depth>> ] bi ;
: spider-next-page ( spider -- )
@ -119,7 +131,7 @@ PRIVATE>
: run-spider-loop ( spider -- )
dup spider-page? [
[ spider-next-page ] [ run-spider-loop ] bi
[ spider-next-page ] [ spider-sleep ] [ run-spider-loop ] tri
] [
drop
] if ;