Home / user-3371

jonny's questions

Martin Hope
jonny
Asked: 2021-07-06 06:04:13 +0800 CST
  • 1

We are using postgres LISTEN/NOTIFY mechanics together with node-pg

        let sql = 'LISTEN ' + o.name
        
        db.query (sql)
        
        db.on ('notification', async e => {

Sometimes after long app inactivity time our notifications stop to deliver

What exactly is going on undercover node-pg LISTEN?

What is OK state for this situation? Shouldn't be there active connection from app to db?

How we can debug this?

postgresql
Martin Hope
jonny
Asked: 2014-10-27 23:50:41 +0800 CST
  • 1

I can't use outgoing http requests in IIS due some security permissions or something

I am trying to use my own REST http service (it is a standalone application) on localhost in my perl CGI site

use LWP::UserAgent;
my $ua = LWP::UserAgent -> new (timeout => 600);
my $response = $ua -> get ('http://127.0.0.1:8000/get');
if ($response -> is_error ()) {
    die join ("\n\n",
        $response -> error_as_HTML ()
        , $response -> code ()
        , $response -> content ()
        , $response -> status_line ()
    );
}

Here what I've got

<html>
<head><title>An Error Occurred</title></head>
<body>
<h1>An Error Occurred</h1>
<p>500 Can't connect to 127.0.0.1:8000</p>
</body>
</html>


500

Can't connect to 127.0.0.1:8000

Invalid argument. at C:/strawberry/perl/site/lib/LWP/Protocol/http.pm line 60.


500 Can't connect to 127.0.0.1:8000 at C:\inetpub\wwwroot\test\lib\Content\_lib.pm line 724.

my 127.0.0.1:8000 service is a standalone application outside of IIS, it is running and gives an alive status when I access http://127.0.0.1:8000/get via browser; I can see it is listening on port 8000; I turned off firewall

same configuration with same application works with lighttpd on linux box, problem occurs only when I run under windows and IIS

I tried to run my perl CGI application pool as Network Service and even Local System account - same result

How should I configure IIS to allow outgoing http REST calls to another standalone webservice on localhost?

UPDATE

After some low-level investigation, it looks like this is common IIS problem

just google IIS Can't create TCP/IP socket (10106)

iis
Martin Hope
jonny
Asked: 2011-09-22 08:37:15 +0800 CST
  • 9

Ok, I have this in fstab

  //windows_mashine/Backup /backups cifs credentials=/root/.credentials,rw,_netdev,iocharset=utf8,uid=1000 0 0

I have rsnapshot in my cron which backups /etc/ and /usr/local/ and some other files to /backups

Recently I find that when other mashine is down and /backups cannot be mounted rsnapshot backups to physical folder /backups thus it eats partition / space. How can I avoid this?

Can I prevent any writing to /backups when it is not mounted (rsnapshot runs as root, since it need to backup some system files)

backup mount rsnapshot
Martin Hope
jonny
Asked: 2011-04-22 05:19:34 +0800 CST
  • 9

Is it possible to redirect user to file file too big page

when POST request size exceeds specified limit?

I am aware about max-request-size option, but it gives just static page that cannot be overloaded.

I am thinking to create a rewrite rule which takes

content-size from request body as input and redirects to error page

UPDATE

now we use nginx as front-end. Any new suggestions?

upload .htaccess nginx lighttpd httpd.conf