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nginx下perl(fastcgi)配置笔记  


官方文档 http://wiki.codemongers.com/NginxSimpleCGI

1. perl-cgi接口程序
#cd $path/nginx/sbin
#vi cgiwrap-fcgi.pl
#需要注意的是/tmp/cgiwrap-dispatch.sock这个文件的属主要改成与nginx进程一致

#!/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 {

#$socket = FCGI::OpenSocket( “127.0.0.1:8999″, 10 ); #use IP sockets
#$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!!
#foreach $item (keys %ENV) { delete $ENV{$item}; }
$proc_manager = FCGI::ProcManager->new( {n_processes => 5} );
$socket = FCGI::OpenSocket( “/tmp/cgiwrap-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,
&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";
}
}
}

# chmod +x cgiwrap-fcgi.pl

# 写一个socket监听脚本
#!/bin/sh
$path/sbin/cgiwrap-fcgi.pl > /dev/null 2>&1 &
sleep 2
chown nobody /tmp/cgiwrap-dispatch.sock

# 两个启动报错解决办法
Can’t locate FCGI.pm
wget http://www.cpan.org/modules/by-module/FCGI/FCGI-0.67.tar.gz
tar zxf … && cd FCGI-0xxx && perl Makefile.PL && make && make install
Can’t locate FCGI/ProcManager.pm
wget http://www.cpan.org/modules/by-module/FCGI/FCGI-ProcManager-0.18.tar.gz
tar zxf … && cd FCGI-Pxxx && perl Makefile.PL && make && make install

2.修改nginx.conf
include perl_fcgi.conf;

#cat perl_fcgi.conf

location ~ \.pl$ {
gzip off; #gzip makes scripts feel slower since they have to complete before getting gzipped
fastcgi_pass unix:/tmp/cgiwrap-dispatch.sock;
fastcgi_index index.cgi;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
fastcgi_param QUERY_STRING $query_string;
fastcgi_param REQUEST_METHOD $request_method;
fastcgi_param CONTENT_TYPE $content_type;
fastcgi_param CONTENT_LENGTH $content_length;
fastcgi_param GATEWAY_INTERFACE CGI/1.1;
fastcgi_param SERVER_SOFTWARE nginx;
fastcgi_param SCRIPT_NAME $fastcgi_script_name;
fastcgi_param REQUEST_URI $request_uri;
fastcgi_param DOCUMENT_URI $document_uri;
fastcgi_param DOCUMENT_ROOT $document_root;
fastcgi_param SERVER_PROTOCOL $server_protocol;
fastcgi_param REMOTE_ADDR $remote_addr;
fastcgi_param REMOTE_PORT $remote_port;
fastcgi_param SERVER_ADDR $server_addr;
fastcgi_param SERVER_PORT $server_port;
fastcgi_param SERVER_NAME $server_name;
}

kill -HUP `cat $PATH/nginx.pid`

3.编写一个perl测试文件,并放于website目录
#cat test.pl

#!/usr/bin/perl
print “Content-type: text/html\n\n”;
print “Hello, world.“;

4.关闭所有接口程序perl-fcgi
kill `ps aux|grep perl-fcgi|grep -v grep | awk ‘{print $2}’`