[plexippus-xpath-devel] Beginner: trying out xpath
Ivan Shvedunov
ivan4th at gmail.com
Fri Nov 26 23:56:43 UTC 2010
Hello.
The error message indicates that your cxml-stp is not the most recent one.
Please use the version from quicklisp (make sure it was updated since its
beta release if you're already using it) or from cxml-stp git repository:
git clone http://www.lichteblau.com/git/cxml-stp.git
On Sat, Nov 27, 2010 at 2:48 AM, Andrei Stebakov <lispercat at gmail.com> wrote:
> Just tired to evaluate
>
> (let ((doc (chtml:parse (drakma:http-request "http://www.google.com")
> (stp:make-builder))))
> (xpath:evaluate "//body" doc))
>
> This results in an exception:
> The value NIL is not of type VECTOR.
> [Condition of type TYPE-ERROR]
>
> Restarts:
> 0: [RETRY] Retry SLIME interactive evaluation request.
> 1: [*ABORT] Return to SLIME's top level.
> 2: [TERMINATE-THREAD] Terminate this thread (#<THREAD "worker"
> RUNNING {C499B91}>)
>
> Backtrace:
> 0: (CXML-STP-IMPL::NORMALIZE-TEXT-NODES! ..)
> 1: ((SB-PCL::FAST-METHOD XPATH-PROTOCOL:CHILD-PIPE-USING-NAVIGATOR
> ((EQL :DEFAULT-NAVIGATOR) CXML-STP:ELEMENT)) ..)
> 2: ((LAMBDA (SB-PCL::.PV. SB-PCL::.NEXT-METHOD-CALL. SB-PCL::.ARG0.
> SB-PCL::.ARG1.)) ..)
> 3: ((LAMBDA (XPATH::NODE XPATH::STARTING-NODE)) ..)
> 4: ((LAMBDA (XPATH::N)) ..)
> 5: (XPATH::MAPPEND-PIPE ..)
> 6: (XPATH::MAPPEND-PIPE ..)
> 7: (XPATH::MAPPEND-PIPE ..)
> 8: (XPATH::MAPPEND-PIPE ..)
> 9: ((LAMBDA (XPATH::NODE XPATH::STARTING-NODE)) ..)
> 10: ((LAMBDA (XPATH::N)) #.(CXML-STP-IMPL::DOCUMENT :CHILDREN
> '(#.(CXML-STP:ELEMENT #| :PARENT of type DOCUMENT |# :CHILDREN '#
> :LOCAL-NAME "html" :NAMESPACE-URI "http://www.w3.org/1999/xhtml"))))
> 11: (XPATH::MAPPEND-PIPE ..)
> 12: ((LAMBDA (XPATH::NODE XPATH::STARTING-NODE)) ..)
> 13: ((LAMBDA (XPATH:CONTEXT)) #<XPATH:CONTEXT {DA0EA59}>)
> 14: (XPATH:EVALUATE-COMPILED ..)
>
>
> When evaluating "body" (without //) just returns an empty set.
>
> Got the latest xpath, cxml-stp, closure-html.
> What am I missing? Parsing html, should I use (stp:do-recursively
> ...) instead for better results?
>
> Thank you,
> Andrew
>
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--
Ivan Shvedunov <ivan4th at gmail.com>
;; My GPG fingerprint is: 2E61 0748 8E12 BB1A 5AB9 F7D0 613E C0F8 0BC5 2807
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