配置Nginx 运行CGI(Perl-cgi)

笔者的nginx安装目录为/usr/local/nginx

虚拟机配置文件为/usr/local/nginx/conf/vhosts.conf

目前php fast-cgi已支持

以下操作均在su下完成

=====================

安装perl cgi模块

wget http://www.cpan.org/modules/by-module/FCGI/FCGI-0.67.tar.gz
tar -zxvf FCGI-0.67.tar.gz
cd FCGI-0.67
perl Makefile.PL
make && make install

安装FCGI-ProcManager:
wget http://search.cpan.org/CPAN/authors/id/G/GB/GBJK/FCGI-ProcManager-0.18.tar.gz
tar -xzxf FCGI-ProcManager-0.18.tar.gz
cd FCGI-ProcManager-0.18
perl Makefile.PL
make    make install

===================

先在/bin目录下放置一个perl写的分发器，取名叫perl-fcgi

vi /bin/perl-cgi

#!/usr/bin/perl -w
use FCGI;
use Socket;
use FCGI::ProcManager;
sub shutdown { FCGI::CloseSocket($socket); exit; }
sub restart { FCGI::CloseSocket($socket); &main; }
use sigtrap 'handler', \&shutdown, 'normal-signals';
use sigtrap 'handler', \&restart, 'HUP';
require 'syscall.ph';
use POSIX qw(setsid);
#&daemonize; we don't daemonize when running under runsv
#this keeps the program alive or something after exec'ing perl scripts
END() { }
BEGIN() { }
{
no warnings;
*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 {
$socket = FCGI::OpenSocket( "127.0.0.1:10081", 10 ); #use IP sockets
#$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!!
#foreach $item (keys %ENV) { delete $ENV{$item}; }
$proc_manager = FCGI::ProcManager->new( {n_processes => 5} );
#$socket = FCGI::OpenSocket( "/opt/nginx/fcgi/cgi.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,
&FCGI::FAIL_ACCEPT_ON_INTR );
$proc_manager->pm_manage();
if ($request) { request_loop() }
FCGI::CloseSocket($socket);
}
sub request_loop {
while ( $request->Accept() >= 0 ) {
$proc_manager->pm_pre_dispatch();
#processing any STDIN input from WebServer (for CGI-POST actions)
$stdin_passthrough = '';
{ no warnings; $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 );
pipe( PARENT_ERR, CHILD_ERR );
my $pid = open( CHILD_O, "-|" );
unless ( defined($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;
}
$oldfh = select(PARENT_ERR);
$| = 1;
select(CHILD_O);
$| = 1;
select($oldfh);
if ( $pid > 0 ) {
close(CHILD_RD);
close(CHILD_ERR);
print PARENT_WR $stdin_passthrough;
close(PARENT_WR);
$rin = $rout = $ein = $eout = '';
vec( $rin, fileno(CHILD_O), 1 ) = 1;
vec( $rin, fileno(PARENT_ERR), 1 ) = 1;
$ein = $rin;
$nfound = 0;
while ( $nfound =
select( $rout = $rin, undef, $ein = $eout, 10 ) )
{
die "$!" unless $nfound != -1;
$r1 = vec( $rout, fileno(PARENT_ERR), 1 ) == 1;
$r2 = vec( $rout, fileno(CHILD_O), 1 ) == 1;
$e1 = vec( $eout, fileno(PARENT_ERR), 1 ) == 1;
$e2 = vec( $eout, fileno(CHILD_O), 1 ) == 1;
if ($r1) {
while ( $bytes = read( PARENT_ERR, $errbytes, 4096 ) ) {
print STDERR $errbytes;
}
if ($!) {
$err = $!;
die $!;
vec( $rin, fileno(PARENT_ERR), 1 ) = 0
unless ( $err == EINTR or $err == EAGAIN );
}
}
if ($r2) {
while ( $bytes = read( CHILD_O, $s, 4096 ) ) {
print $s;
}
if ( !defined($bytes) ) {
$err = $!;
die $!;
vec( $rin, fileno(CHILD_O), 1 ) = 0
unless ( $err == EINTR or $err == EAGAIN );
}
}
last if ( $e1 || $e2 );
}
close CHILD_RD;
close PARENT_ERR;
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(PARENT_ERR);
close(STDIN);
close(STDERR);
#fcntl(CHILD_RD, F_DUPFD, 0);
syscall( &SYS_dup2, fileno(CHILD_RD), 0 );
syscall( &SYS_dup2, fileno(CHILD_ERR), 2 );
#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";
}
}
}

给这个脚本执行权限

chmod +x /bin/perl-fcgi
然后试试看能否启动
/bin/perl-cgi &
若是成功则会出现以下信息
FastCGI: server (pid 21315): initialized
FastCGI: manager (pid 17915): server (pid 21315) started

如果遇到错误Can’t locate FCGI.pm,那么执行下面的命令

perl -MCPAN -e 'install FCGI'

perl -MCPAN -e 'install FCGI::ProcManager'

cd /usr/include; h2ph *.h */*.h

第一、二条命令是给perl安装FCGI模块，第三条是注册perl能识别的头文件，然后重新执行/bin/perl-fcgi, 如果正常的话，那么执行：

netstat -tunlp

列表中应该出现
tcp 0 0 127.0.0.1:10081 0.0.0.0:* LISTEN 5640/perl
启用分发器

/bin/perl-fcgi > /dev/null 2>&1 &
将其写入rc.local
echo "/bin/perl-fcgi > /dev/null 2>&1 &" >> /etc/rc.local
上面的方式启动后perl-fcgi是以执行它的用户身份运行的，对于web程序来说这是很不利的。老外用perl写了一个脚本Noah Friedman可以用指定的用户来运行某个程序，源程序在这里，这里也贴出来方便查阅

配置Nginx 运行CGI(Perl-cgi)

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