[REBOL] Re: How to properly parse HTML and XHTML Meta Tags
From: christian::ensel::gmx::de at: 12-Sep-2008 9:42
Hi Von,
in your special case, it doesn't seem to be necessary to go thru the >
or /> hassle, if you rely on " as a delimiter.
But keep in mind that in many, many cases the solution below as well as
yours will fail.
E.g. in cases where the content and name attributes are given in reverse
order, which is valid HTML, too.
However, have a look at the following PARSE-METATAGS.
HTH,
Christian
------------------------------------------------------------------------
parse-metatags: func [page [url!] /local title keywords description] [
page: read http://www.rebol.com
parse page [thru <title> copy title to </title>]
parse/all page [thru {<meta name="keywords" content="} copy keywords
to {"}]
parse/all page [thru {<meta name="description" content="} copy
description to {"}]
foreach keyword keywords: parse/all any [keywords ""] "," [trim keyword]
reduce [
'title title
'keywords keywords
'description description
]
]
>> parse-metatags http://www.rebol.com
== [
title "REBOL Technologies"
keywords ["REBOL" "Web 3.0" "Web 2.0" "programming" "Internet"
software
"domain specific language" "di
stributed computing" "collaboration" "operating systems" "development"
rebel
]
description {REBOL: a Web 3.0 language and system based on new
lightweight computing methods. Site inclu
des products, downloads, documentation, and support.}
]
vonja-sbcglobal.net schrieb:
