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LWP::Debug(3pm) User Contributed Perl Documentation LWP::Debug(3pm)
NAME
LWP::Debug - debug routines for the libwww-perl library
SYNOPSIS
use LWP::Debug qw(+ -conns);
# Used internally in the library
LWP::Debug::trace('send()');
LWP::Debug::debug('url ok');
LWP::Debug::conns("read $n bytes: $data");
DESCRIPTION
LWP::Debug provides tracing facilities. The trace(), debug() and conns() function are
called within the library and they log information at increasing levels of detail. Which
level of detail is actually printed is controlled with the "level()" function.
The following functions are available:
level(...)
The "level()" function controls the level of detail being logged. Passing '+' or '-'
indicates full and no logging respectively. Individual levels can switched on and of
by passing the name of the level with a '+' or '-' prepended. The levels are:
trace : trace function calls
debug : print debug messages
conns : show all data transfered over the connections
The LWP::Debug module provide a special import() method that allows you to pass the
level() arguments with initial use statement. If a use argument start with '+' or '-'
then it is passed to the level function, else the name is exported as usual. The
following two statements are thus equivalent (if you ignore that the second pollutes
your namespace):
use LWP::Debug qw(+);
use LWP::Debug qw(level); level('+');
trace($msg)
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.
debug($msg)
The "debug()" function is used for high-granularity reporting of state in functions.
conns($msg)
The "conns()" function is used to show data being transferred over the connections.
This may generate considerable output.
perl v5.10.0 2008-04-07 LWP::Debug(3pm)
Generated by $Id: phpMan.php,v 4.49 2006/02/26 13:18:18 chedong Exp $ Author: Che Dong
On Apache
Under GNU General Public License
2012-05-24 15:08 @38.107.179.236 Crawled by CCBot/1.0 (+http://www.commoncrawl.org/bot.html)