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# 28feb11abu
# (c) Software Lab. Alexander Burger
# *ScrHost *ScrPort *ScrGate *Title *Expect *Found
# *Links *Forms *Buttons *Fields *Errors
# Scrape HTML form(s)
(de scrape (Host Port How)
(client (setq *ScrHost Host) (setq *ScrPort Port) How
(off *ScrGate *Links *Forms *Buttons *Fields *Errors)
(while
(from
"303 See Other"
"<title>"
"<base href=\"http://"
"<a href=\""
" action=\""
"<input type=\"submit\" name=\""
"<input type=\"hidden\" name=\""
"<input type=\"text\" name=\""
"<input type=\"password\" name=\""
"<select name=\""
"<option selected=\"selected\">"
"<textarea name=\""
"<span id=\""
"<div class=\"error\">"
*Expect )
(case @
("303 See Other"
(when (from "Location: http://")
(let L (split (line) ':)
(if (cdr L)
(scrape
(pack (pop 'L))
(ifn (format (car (setq L (split (car L) '/))))
80
(pop 'L)
@ )
(glue '/ L) )
(setq L (split (car L) '/))
(scrape (pack (pop 'L)) 80 (glue '/ L)) ) ) ) )
("<title>"
(setq *Title (ht:Pack (till "<"))) )
("<base href=\"http://"
(let L (split (till "\"") ':)
(if (cdr L)
(setq
*ScrHost (pack (pop 'L))
*ScrPort (format (cdr (rot (car L)))) )
(setq *ScrGate (pack (cdr (member '/ (car L))))) ) ) )
("<a href=\""
(let Url (pack *ScrGate (till "\"" T))
(from ">")
(cond
((till "<")
(queue '*Links (cons (ht:Pack @) Url)) )
((= "<img" (till " " T))
(from "alt=\"")
(queue '*Links (cons (ht:Pack (till "\"")) Url)) ) ) ) )
(" action=\""
(queue '*Forms # (action . fields)
(list (pack *ScrGate (till "\"" T))) ) )
("<input type=\"submit\" name=\""
(let Nm (till "\"" T)
(from "value=\"")
(queue '*Buttons # (label field . form)
(cons
(ht:Pack (till "\""))
(cons Nm T)
(last *Forms) ) ) ) )
("<input type=\"hidden\" name=\""
(conc (last *Forms)
(cons
(cons (till "\"" T)
(prog (from "value=\"") (ht:Pack (till "\"")))) ) ) )
(("<input type=\"text\" name=\"" "<input type=\"password\" name=\"")
(conc (last *Forms)
(cons
(queue '*Fields
(cons (till "\"" T)
(prog (from "value=\"") (ht:Pack (till "\"")))) ) ) ) )
("<select name=\""
(conc (last *Forms)
(cons
(queue '*Fields (cons (till "\"" T))) ) ) )
("<option selected=\"selected\">"
(con (last *Fields) (ht:Pack (till "<"))) )
("<textarea name=\""
(conc (last *Forms)
(cons
(queue '*Fields
(cons (till "\"" T)
(prog (from ">") (ht:Pack (till "<"))) ) ) ) ) )
("<span id=\""
(from ">")
(queue '*Fields (ht:Pack (till "<"))) )
("<div class=\"error\">"
(queue '*Errors (ht:Pack (till "<"))) )
(T (on *Found)) ) )
(or *Errors *Title) ) )
# Expect content
(de expect (*Expect . "Prg")
(let *Found NIL
(run "Prg")
(unless *Found
(quit "Content not found" *Expect) ) ) )
# Click on a link
(de click (Lbl Cnt)
(let L (cdr (target *Links Lbl Cnt))
(when (pre? "http://" L)
(setq
L (split (nth (chop L) 8) '/ ':)
*ScrHost (pack (pop 'L))
*ScrPort (ifn (format (car L)) 80 (pop 'L) @)
L (glue '/ L) ) )
(scrape *ScrHost *ScrPort L) ) )
# Press a button
(de press (Lbl Cnt)
(let B (target *Buttons Lbl Cnt)
(scrape *ScrHost *ScrPort
(cons
(caddr B)
(glue "&"
(mapcar
'((X)
(list (car X) '= (ht:Fmt (cdr X))) )
(cons (cadr B) (cdddr B)) ) ) ) ) ) )
# Retrieve a field's value
(de value (Fld Cnt)
(fin (field Fld Cnt)) )
# Set a field's value
(de enter (Fld Str Cnt)
(con (field Fld Cnt) Str) )
# Inspect current page
(de display ()
(prinl "###############")
(apply println (mapcar car *Links) 'click)
(prinl)
(apply println (mapcar car *Buttons) 'press)
(prinl)
(apply println (trim (mapcar fin *Fields)) 'value)
(prinl)
*Title )
### Utility functions ###
(de target (Lst Lbl Cnt)
(cond
((num? Lbl)
(get Lst Lbl) )
((pair Lbl) Lbl)
(T
(default Cnt 1)
(or
(find
'((L)
(and
(pre? Lbl (car L))
(=0 (dec 'Cnt)) ) )
Lst )
(quit "Target not found" Lbl) ) ) ) )
(de field (Fld Cnt)
(or
(cond
((gt0 Fld)
(get *Fields Fld) )
((lt0 Fld)
(get *Fields (+ (length *Fields) Fld 1)) )
(T (assoc Fld (cdr (get *Forms (or Cnt 1))))) )
(quit "Field not found" Fld) ) )
# vi:et:ts=3:sw=3
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