#!/usr/bin/node
//
//
//
//
// data_collector_status source
//
//
//
//
// <![CDATA[
//
// File: data_collector_status
//
// Author: Francesco.Prelz@mi.infn.it
//
// Description: Sample CGI program built with server-side Javascript
// (node.js) that checks on the status of a background network listener
//
// History:
// 10-Oct-2014 Initial creation.
var fs = require('fs');
var path = require('path');
var childp = require('child_process');
var querystring = require('querystring');
var datac = "data_collector_cgi";
var pidfile = "/var/tmp/" + datac + ".pid";
var xmldata = "/var/tmp/" + datac + "_data.xml";
var the_pid;
var pid_status = "stopped";
try
{
the_pid = fs.readFileSync(pidfile, "utf8");
the_pid = the_pid.replace(/[^0-9]*$/, '');
}
catch (err)
{
the_pid = "";
}
var attrs = querystring.parse(process.env.QUERY_STRING);
if (parseInt(the_pid, 10) > 0)
{
var pid_in_proc = "/proc/"+the_pid;
if (fs.existsSync(pid_in_proc))
{
if (attrs.action == "Stop")
{
process.kill(the_pid);
}
else
{
pid_status = "running";
}
}
}
if (pid_status == "stopped" && attrs.action == "Start")
{
var child = childp.spawn("/home/guest/public_html/esercizi/wireless/jsFiles/data_collector_process", [ pidfile, xmldata ],
{
detached: true,
stdio: [ 'ignore', 'ignore', 'ignore' ]
});
the_pid = child.pid;
child.unref();
pid_status = "running";
}
process.stdout.write("Content-type: text/html\n\n");
process.stdout.write("STATUS: "+ pid_status + " childPID: " + the_pid + "\n");
]]></plaintext></span>