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|
#!/usr/bin/perl
use Socket;
use Carp;
sub spawn; # forward declaration
sub logmsg { #print "$0 $$: @_ at ", scalar localtime, "\n"
}
my $port = shift || $ARGV[0];
my $proto = getprotobyname('tcp');
$port = $1 if $port =~ /(\d+)/; # untaint port number
socket(Server, PF_INET, SOCK_STREAM, $proto)|| die "socket: $!";
setsockopt(Server, SOL_SOCKET, SO_REUSEADDR,
pack("l", 1)) || die "setsockopt: $!";
bind(Server, sockaddr_in($port, INADDR_ANY))|| die "bind: $!";
listen(Server,SOMAXCONN) || die "listen: $!";
logmsg "server started on port $port";
open(PID, ">log/server.pid");
print PID $$;
close(PID);
my $waitedpid = 0;
my $paddr;
sub REAPER {
$waitedpid = wait;
$SIG{CHLD} = \&REAPER; # loathe sysV
logmsg "reaped $waitedpid" . ($? ? " with exit $?" : '');
}
$SIG{CHLD} = \&REAPER;
for ( $waitedpid = 0;
($paddr = accept(Client,Server)) || $waitedpid;
$waitedpid = 0, close Client)
{
next if $waitedpid and not $paddr;
my($port,$iaddr) = sockaddr_in($paddr);
my $name = gethostbyaddr($iaddr,AF_INET);
logmsg "connection from $name [", inet_ntoa($iaddr), "] at port $port";
# this code is forked and run
spawn sub {
while(<STDIN>) {
if($_ =~ /(GET|POST|HEAD) (.*) HTTP\/1.(\d)/) {
$request=$1;
$path=$2;
$ver=$3;
}
elsif($_ =~ /^Content-Length: (\d*)/) {
$cl=$1;
}
# print "RCV: $_";
push @headers, $_;
if($left > 0) {
$left -= length($_);
}
if(($_ eq "\r\n") or ($_ eq "")) {
if($request eq "POST") {
$left=$cl;
}
else {
$left = -1; # force abort
}
}
if($left < 0) {
last;
}
}
#
# we always start the path with a number, this is the
# test number that this server will use to know what
# contents to pass back to the client
#
if($path =~ /^\/(\d*)/) {
$testnum=$1;
}
else {
print STDERR "UKNOWN TEST CASE\n";
exit;
}
open(INPUT, ">log/server.input");
for(@headers) {
print INPUT $_;
}
close(INPUT);
# send a reply to the client
open(DATA, "<data/reply$testnum.txt");
while(<DATA>) {
print $_;
}
close(DATA);
# print "Hello there, $name, it's now ", scalar localtime, "\r\n";
};
}
sub spawn {
my $coderef = shift;
unless (@_ == 0 && $coderef && ref($coderef) eq 'CODE') {
confess "usage: spawn CODEREF";
}
my $pid;
if (!defined($pid = fork)) {
logmsg "cannot fork: $!";
return;
} elsif ($pid) {
logmsg "begat $pid";
return; # I'm the parent
}
# else I'm the child -- go spawn
open(STDIN, "<&Client") || die "can't dup client to stdin";
open(STDOUT, ">&Client") || die "can't dup client to stdout";
## open(STDERR, ">&STDOUT") || die "can't dup stdout to stderr";
exit &$coderef();
}
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