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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)