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getting plain cgi scripts working with nginx setup

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This commit is contained in:
Dan Buch 2011-01-03 17:18:06 -05:00
parent 50c240b0e1
commit 080b7ba992
7 changed files with 230 additions and 9 deletions
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2
.gitignore vendored
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@ -1,5 +1,7 @@
*/*.log */*.log
*/*.pid */*.pid
*/*.sock
web/nginx.conf web/nginx.conf
web/cgiwrap-fcgi.pl
web/*_temp/* web/*_temp/*

17
web/Makefile
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@ -1,16 +1,29 @@
ROOT ?= $(PWD) ROOT ?= $(PWD)
HTTP_PORT ?= 49228 HTTP_PORT ?= 49228
NGINX_CONF_IN := nginx.conf.in
ALL_NGINX_CONF_INPUTS := \
$(NGINX_CONF_IN) \
$(wildcard perl_requirements.d/*) \
$(wildcard perl_locations.d/*)
serve: nginx.conf serve: nginx.conf
nginx -p $(ROOT)/ -c $(ROOT)/$< nginx -p $(ROOT)/ -c $(ROOT)/$<
nginx.conf: nginx.conf.in nginx.conf: $(ALL_NGINX_CONF_INPUTS)
cat $< | \ cat $< | \
sed -e 's@__ROOT__@$(ROOT)@g' \ sed -e 's@__ROOT__@$(ROOT)@g' \
-e 's@__HTTP_PORT__@$(HTTP_PORT)@g' > $@ -e 's@__HTTP_PORT__@$(HTTP_PORT)@g' > $@
.PHONY: serve serve-cgiwrap: cgiwrap-fcgi.pl
perl $<
cgiwrap-fcgi.pl: cgiwrap-fcgi.pl.in
cat $< | sed -e 's@__ROOT__@$(ROOT)@g' > $@
.PHONY: serve serve-cgiwrap

155
web/cgiwrap-fcgi.pl.in Normal file
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@ -0,0 +1,155 @@
#!/usr/bin/env perl
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);
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 {
$proc_manager = FCGI::ProcManager->new( {n_processes => 5} );
$socket = FCGI::OpenSocket("__ROOT__/nginx-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";
}
}
}

7
web/html/cgi-bin/test.cgi Executable file
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@ -0,0 +1,7 @@
#!/usr/bin/env perl
printf("Content-Type: text/plain\n\n");
printf("Hello Test\n");
1;
__END__

28
web/lib/perl/base.pm
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@ -1,17 +1,35 @@
package base; package base;
use strict;
use warnings;
use nginx; use nginx;
sub handler { sub handler {
my $r = shift; my $r = shift();
$r->send_http_header("text/plain");
return OK if $r->header_only;
$r->print("hello!\n"); $r->send_http_header("text/plain");
$r->rflush; return OK if $r->header_only();
$r->print("Hello There!\n");
$r->rflush();
if (-f $r->filename or -d _) { if (-f $r->filename or -d _) {
$r->print($r->uri, " exists!\n"); $r->print($r->uri, " exists!\n");
} else {
$r->print($r->uri, " does not exist!\n");
}
my $directory = '/home/me/tmp';
# '/home/me/src/LearningPerl/src/web';
my $didopen = opendir(DIR, $directory);
if ($didopen) {
while (my $file = readdir(DIR)) {
$r->print("$file\n");
}
closedir(DIR);
} }
} }

28
web/nginx.conf.in
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@ -24,14 +24,40 @@ http {
autoindex on; autoindex on;
server { server {
root __ROOT__/html;
index index.html;
listen __HTTP_PORT__; listen __HTTP_PORT__;
server_name localhost; server_name localhost;
access_log __ROOT__/access.log main; access_log __ROOT__/access.log main;
root __ROOT__/html;
include __ROOT__/perl_locations.d/*; include __ROOT__/perl_locations.d/*;
location ~ ^/cgi-bin/.*\.cgi$ {
gzip off;
fastcgi_pass unix:__ROOT__/nginx-cgiwrap-dispatch.sock;
fastcgi_index index.cgi;
fastcgi_param SCRIPT_FILENAME __ROOT__/html$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;
} }
} }
}
# vim:filetype=nginx # vim:filetype=nginx

2
web/perl_locations.d/base.conf
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@ -1,4 +1,4 @@
location / { location /embedded {
perl base::handler; perl base::handler;
} }