cs_register_strfunc(3) [debian man page]

cs_register_strfunc(3)						      cs/cs.h						    cs_register_strfunc(3)

NAME

       cs_register_strfunc  - register a string handling function

SYNOPSIS

       #include <cs/cs.h>

       NEOERR *cs_register_strfunc(CSPARSE *parse, char *funcname, CSSTRFUNC str_func);

ARGUMENTS

       parse - a pointer to a CSPARSE structure initialized with cs_init()
       funcname - the name for the CS function call
       Note that registering a duplicate funcname will
       raise a NERR_DUPLICATE error
       str_func - a CSSTRFUNC not-callback

DESCRIPTION

       cs_register_strfunc will register a string function that can be called during CS render.  This not-callback is designed to allow for string
       formating/escaping functions that are not built-in to CS (since CS is not HTML specific, for instance, but it is very  useful  to  have	CS
       have functions for javascript/html/url escaping).  Note that we explicitly don't provide any associated data or anything to attempt to keep
       you from using this as a generic callback...  The format of a CSSTRFUNC is: NEOERR * str_func(char *in, char **out); This  function  should
       not modify the input string, and should allocate the output string with a libc function.  (as we will call free on it)

SEE ALSO

       cs_dump(3),  cs_destroy(3),  cs_render(3),  cs_register_esc_strfunc(3),	cs_arg_parsev(3),  cs_register_fileload(3),  cs_init(3), cs_regis-
       ter_strfunc(3), cs_arg_parse(3), cs_parse_string(3), cs_parse_file(3), =(3), cs_register_function

ClearSilver							   12 July 2007 					    cs_register_strfunc(3)

HTML::LinkExtor(3)					User Contributed Perl Documentation					HTML::LinkExtor(3)

NAME

       HTML::LinkExtor - Extract links from an HTML document

SYNOPSIS

	require HTML::LinkExtor;
	$p = HTML::LinkExtor->new(&cb, "http://www.perl.org/");
	sub cb {
	    my($tag, %links) = @_;
	    print "$tag @{[%links]}
";
	}
	$p->parse_file("index.html");

DESCRIPTION

       HTML::LinkExtor is an HTML parser that extracts links from an HTML document.  The HTML::LinkExtor is a subclass of HTML::Parser. This means
       that the document should be given to the parser by calling the $p->parse() or $p->parse_file() methods.

       $p = HTML::LinkExtor->new
       $p = HTML::LinkExtor->new( $callback )
       $p = HTML::LinkExtor->new( $callback, $base )
	   The constructor takes two optional arguments. The first is a reference to a callback routine. It will be called as links are found. If
	   a callback is not provided, then links are just accumulated internally and can be retrieved by calling the $p->links() method.

	   The $base argument is an optional base URL used to absolutize all URLs found.  You need to have the URI module installed if you provide
	   $base.

	   The callback is called with the lowercase tag name as first argument, and then all link attributes as separate key/value pairs.  All
	   non-link attributes are removed.

       $p->links
	   Returns a list of all links found in the document.  The returned values will be anonymous arrays with the following elements:

	     [$tag, $attr => $url1, $attr2 => $url2,...]

	   The $p->links method will also truncate the internal link list.  This means that if the method is called twice without any parsing
	   between them the second call will return an empty list.

	   Also note that $p->links will always be empty if a callback routine was provided when the HTML::LinkExtor was created.

EXAMPLE

       This is an example showing how you can extract links from a document received using LWP:

	 use LWP::UserAgent;
	 use HTML::LinkExtor;
	 use URI::URL;

	 $url = "http://www.perl.org/";  # for instance
	 $ua = LWP::UserAgent->new;

	 # Set up a callback that collect image links
	 my @imgs = ();
	 sub callback {
	    my($tag, %attr) = @_;
	    return if $tag ne 'img';  # we only look closer at <img ...>
	    push(@imgs, values %attr);
	 }

	 # Make the parser.  Unfortunately, we don't know the base yet
	 # (it might be different from $url)
	 $p = HTML::LinkExtor->new(&callback);

	 # Request document and parse it as it arrives
	 $res = $ua->request(HTTP::Request->new(GET => $url),
			     sub {$p->parse($_[0])});

	 # Expand all image URLs to absolute ones
	 my $base = $res->base;
	 @imgs = map { $_ = url($_, $base)->abs; } @imgs;

	 # Print them out
	 print join("
", @imgs), "
";

SEE ALSO

       HTML::Parser, HTML::Tagset, LWP, URI::URL

COPYRIGHT

       Copyright 1996-2001 Gisle Aas.

       This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

perl v5.18.2							    2013-03-25							HTML::LinkExtor(3)