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LWP::Debug(3)		       User Contributed Perl Documentation		    LWP::Debug(3)

       LWP::Debug - debug routines for the libwww-perl library

	use LWP::Debug qw(+ -conns);

	# Used internally in the library
	LWP::Debug::debug('url ok');
	LWP::Debug::conns("read $n bytes: $data");

       LWP::Debug provides tracing facilities. The trace(), debug() and conns() function are
       called within the library and they log information at increasing levels of detail. Which
       level of detail is actually printed is controlled with the "level()" function.

       The following functions are available:

	   The "level()" function controls the level of detail being logged. Passing '+' or '-'
	   indicates full and no logging respectively. Inidividual levels can switched on and of
	   by passing the name of the level with a '+' or '-' prepended.  The levels are:

	     trace   : trace function calls
	     debug   : print debug messages
	     conns   : show all data transfered over the connections

	   The LWP::Debug module provide a special import() method that allows you to pass the
	   level() arguments with initial use statement.  If a use argument start with '+' or '-'
	   then it is passed to the level function, else the name is exported as usual.  The fol-
	   lowing two statements are thus equivalent (if you ignore that the second pollutes your

	     use LWP::Debug qw(+);
	     use LWP::Debug qw(level); level('+');

	   The "trace()" function is used for tracing function calls. The package and calling
	   subroutine name is printed along with the passed argument. This should be called at
	   the start of every major function.

	   The "debug()" function is used for high-granularity reporting of state in functions.

	   The "conns()" function is used to show data being transferred over the connections.
	   This may generate considerable output.

libwww-perl-5.65			    1997-12-02				    LWP::Debug(3)
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