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SOAP::Lite Servers and inetd

by tektsu (Acolyte)
on Apr 15, 2004 at 21:52 UTC ( #345567=perlquestion: print w/replies, xml ) Need Help??
tektsu has asked for the wisdom of the Perl Monks concerning the following question:

I have found no end of useful documentation on writing SOAP Servers. Unfortunately, I haven't been ubale to figure out what I want to do, so I'm hoping someone here will have this elusive information.

I want to write a standalone forking server, which will allow me to add or modify methods without stopping and restarting the server. That would be easy if I was using SOAP CGI scripts through a webserver, but I will not have webservers on these boxes.

I'm wondering if it would be possible to run the server through inetd. So far, I have not had any success in doing so, but I'm certainly willing to entertain the propect that I am clueless as an explanation for that. Anyone have any pointers? Or alternative ways of doing this?


kiku wa ittoki no haji kikanu wa matsudai no haji

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Re: SOAP::Lite Servers and inetd
by rob_au (Abbot) on Apr 16, 2004 at 02:53 UTC
    By default SOAP::Transport::IO uses STDIN and STDOUT for input and output and as such it should be quite trivial to implement an inetd based SOAP server - The following is an untested inetd-based SOAP server based upon some existing code which I had on hand.
    #!/opt/bin/perl package main; # For Perl 6 forward-compatability # The following constants are used to define server timeout and sock +et # timeout behaviour. sub TIMEOUT_PEER () { 60 } sub TIMEOUT_SERVER () { 300 } use IO::Socket; use POSIX qw( WNOHANG ); use SOAP::Transport::IO; use Socket qw( :crlf ); use vars qw( $VERSION ); $VERSION = sprintf( "%d.%02d", q$Revision: 1.4 $ =~ /(\d+)\.(\d+)/ ); # Define signal handlers for timeout and child events $SIG{'ALRM'} = sub { exit 0 }; $SIG{'CHLD'} = sub { while ( waitpid( -1, WNOHANG ) > 0) {} }; # Create IO socket from STDIN file descriptor on which the network # communication socket is duplicated for the server process by the i +netd # daemon. my $socket = IO::Socket->new_from_fd( STDIN, 'r+' ); unless ( defined $socket ) { croak( 'Cannot create socket from STDIN -- ', $! ); } while ( my $connection = $socket->accept ) { my $child = undef; unless ( defined ( $child = fork() ) ) { croak( 'Cannot fork process to handle new connection -- ', $! +); } if ( $child == 0 ) { # Clear the alarm timeout, close the parent socket and initi +ate # communication with POP3 client. alarm(0); $socket->close; STDIN->fdopen( $connection, 'r' ) or croak( 'Cannot re-open STDIN for input -- ', $! ); STDOUT->fdopen( $connection, 'w' ) or croak( 'Cannot re-open STDOUT for output -- ', $! ); STDERR->fdopen( $connection, 'w' ) or croak( 'Cannot re-open STDERR for output -- ', $! ); STDOUT->autoflush(1); SOAP::Transport::IO::Server ->new ->dispatch_to('/path/to/modules', 'Local::Module') ->handle; } } continue { $connection->close; alarm( TIMEOUT_SERVER ); exit 0; } 1; __END__


    perl -le "print unpack'N', pack'B32', '00000000000000000000001011010001'"

      Excellent! This is just what I was looking for (I guess I should have looked a little harder...).


      kiku wa ittoki no haji kikanu wa matsudai no haji

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