fastcgi-wrapper.pl
#!/usr/bin/perl
use FCGI;
#perl -MCPAN -e 'install FCGI'
use Socket;
use POSIX qw(setsid);
#use Fcntl;
require 'syscall.ph';
&daemonize;
#this keeps the program alive or something after exec'ing perl scripts
END() { } BEGIN() { }
*CORE::GLOBAL::exit = sub { die "fakeexit\nrc=".shift()."\n"; };
eval q{exit};
if ($@) {
exit unless $@ =~ /^fakeexit/;
};
&main;
sub daemonize() {
chdir '/' or die "Can't chdir to /: $!";
defined(my $pid = fork) or die "Can't fork: $!";
exit if $pid;
setsid or die "Can't start a new session: $!";
umask 0;
}
sub main {
$socket = FCGI::OpenSocket( "127.0.0.1:8999", 10 ); #use IP sockets
#$socket = FCGI::OpenSocket( "/var/run/nginx/perl_cgi-dispatch.sock", 10 ); #use UNIX sockets - user running this script must have w access to the 'nginx' folder!!
$request = FCGI::Request( \*STDIN, \*STDOUT, \*STDERR, \%req_params, $socket );
if ($request) { request_loop()};
FCGI::CloseSocket( $socket );
}
sub request_loop {
while( $request->Accept() >= 0 ) {
#processing any STDIN input from WebServer (for CGI-POST actions)
$stdin_passthrough ='';
$req_len = 0 + $req_params{'CONTENT_LENGTH'};
if (($req_params{'REQUEST_METHOD'} eq 'POST') && ($req_len != 0) ){
my $bytes_read = 0;
while ($bytes_read < $req_len) {
my $data = '';
my $bytes = read(STDIN, $data, ($req_len - $bytes_read));
last if ($bytes == 0 || !defined($bytes));
$stdin_passthrough .= $data;
$bytes_read += $bytes;
}
}
#running the cgi app
if ( (-x $req_params{SCRIPT_FILENAME}) && #can I execute this?
(-s $req_params{SCRIPT_FILENAME}) && #Is this file empty?
(-r $req_params{SCRIPT_FILENAME}) #can I read this file?
){
pipe(CHILD_RD, PARENT_WR);
my $pid = open(KID_TO_READ, "-|");
unless(defined($pid)) {
print("Content-type: text/plain\r\n\r\n");
print "Error: CGI app returned no output - Executing $req_params{SCRIPT_FILENAME} failed !\n";
next;
}
if ($pid > 0) {
close(CHILD_RD);
print PARENT_WR $stdin_passthrough;
close(PARENT_WR);
while(my $s = <KID_TO_READ>) { print $s; }
close KID_TO_READ;
waitpid($pid, 0);
} else {
foreach $key ( keys %req_params){
$ENV{$key} = $req_params{$key};
}
# cd to the script's local directory
if ($req_params{SCRIPT_FILENAME} =~ /^(.*)\/[^\/]+$/) {
chdir $1;
}
close(PARENT_WR);
close(STDIN);
#fcntl(CHILD_RD, F_DUPFD, 0);
syscall(&SYS_dup2, fileno(CHILD_RD), 0);
#open(STDIN, "<&CHILD_RD");
exec($req_params{SCRIPT_FILENAME});
die("exec failed");
}
}
else {
print("Content-type: text/plain\r\n\r\n");
print "Error: No such CGI app - $req_params{SCRIPT_FILENAME} may not exist or is not executable by this process.\n";
}
}
}