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DBD::Gofer::Transport:UsereContributed Perl DoDBD::Gofer::Transport::stream(3)
NAME
       DBD::Gofer::Transport::stream - DBD::Gofer transport for stdio
       streaming
SYNOPSIS
         DBI->connect('dbi:Gofer:transport=stream;url=ssh:username AT host.com;dsn=dbi:...',...)
       or, enable by setting the DBI_AUTOPROXY environment variable:
         export DBI_AUTOPROXY='dbi:Gofer:transport=stream;url=ssh:username AT host.com'
DESCRIPTION
       Without the "url=" parameter it launches a subprocess as
         perl -MDBI::Gofer::Transport::stream -e run_stdio_hex
       and feeds requests into it and reads responses from it. But that's not
       very useful.
       With a "url=ssh:username AT host.com" parameter it uses ssh to
       launch the subprocess on a remote system. That's much more useful!
       It gives you secure remote access to DBI databases on any system you
       can login to.  Using ssh also gives you optional compression and many
       other features (see the ssh manual for how to configure that and many
       other options via ~/.ssh/config file).
       The actual command invoked is something like:
         ssh -xq ssh:username AT host.com bash -c $setup $run
       where $run is the command shown above, and $command is
         . .bash_profile 2>/dev/null || . .bash_login 2>/dev/null || . .profile 2>/dev/null; exec "$@"
       which is trying (in a limited and fairly unportable way) to setup the
       environment (PATH, PERL5LIB etc) as it would be if you had logged in to
       that system.
       The ""perl"" used in the command will default to the value of $^X when
       not using ssh.  On most systems that's the full path to the perl that's
       currently executing.
PERSISTENCE
       Currently gofer stream connections persist (remain connected) after all
       database handles have been disconnected. This makes later connections
       in the same process very fast.
       Currently up to 5 different gofer stream connections (based on url) can
       persist.  If more than 5 are in the cache when a new connection is made
       then the cache is cleared before adding the new connection. Simple but
       effective.
TO DO
       Document go_perl attribute
       Automatically reconnect (within reason) if there's a transport error.
       Decide on default for persistent connection - on or off? limits? ttl?
AUTHOR
       Tim Bunce, <http://www.tim.bunce.name>;
LICENCE AND COPYRIGHT
       Copyright (c) 2007, Tim Bunce, Ireland. All rights reserved.
       This module is free software; you can redistribute it and/or modify it
       under the same terms as Perl itself. See perlartistic.
SEE ALSO
       DBD::Gofer::Transport::Base
       DBD::Gofer
perl v5.26.3                      2013-06-24  DBD::Gofer::Transport::stream(3)