WEB服务器之——Nginx支持CGI

安装NGINX步骤省略。

以下操作均在su下完成

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安装perl略。（yum -y install perl*）

开启perl-FCGI支持

perl -MCPAN -e ‘install FCGI‘

perl -MCPAN -e ‘install FCGI::ProcManager

配置perl-fcgi守护进程perl-fcgi.pl存放于nginx/sbin目录下。chmod 755 perl-fcgi.pl

#!/usr/bin/perl
use FCGI;
use Socket;
use POSIX qw(setsid);
require ‘syscall.ph‘;
&daemonize;
END() { } BEGIN() { }
*CORE::GLOBAL::exit = sub { die "fakeexit\nrc=".shift()."\n"; };
eval q{exit};
if ([email protected]) {
        exit unless [email protected] =~ /^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( "127.0.0.1:9001", 10 ); #use IP sockets
        $socket = FCGI::OpenSocket( "/usr/local/services/nginx/logs/perl-fcgi.sock", 51200 ); #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";
            }
        }
}ce