Web Callback Notification

You can configure AWS Elemental Statmux to send you web callback notifications when alerts occur.

To receive web callback notifications, you must have a web server that supports php scripting. Use the following steps to configure this server to receive alert notifications from AWS Elemental Statmux.

To set up web callback notifications

1. Use a text editor such as Notepad on a Windows system or Nano on Linux to create a .php file containing the following text:

   <?php
       function get_raw_post(){
           $data = @file_get_contents('php://input');
           if ($data){
               return $data;
           }
               return "nothing passed";
           }
   
       $file = "../webcallback/notify";
       $fh = fopen($file, "a");
       $data = get_raw_post();
       fwrite($fh, $data);
       fclose($fh);
   ?>

2. Save the file in a directory on your web server.

3. Subscribe to all or some alerts using the steps described here:

   Subscribe to all alerts

   1. On the AWS Elemental Statmux web interface, go to the Settings page and ensure that you're on the General tab.

   2. Complete the Global Alert Notification fields, using the instructions in the following table as a guide. Choose Update.

      Field	Instructions
      Notification: Email	If you want to receive email notifications too, enter the email address of the alert recipient. If your network doesn't allow open relay messages, see Configure Sendmail Relay Server to configure a Sendmail server to relay messages.
      Notification: Web Callback URL	Enter the URL of the appropriate .php file on your web server. This is required if you don't provide an address in the Email field.
      Notify	Select when you want to be notified, either when the alert is raised or when it's cleared. You can choose both options.
      Notes	Add optional notes as needed.

   Subscribe to individual alerts

   1. On the AWS Elemental Statmux web interface, hover over Stats page and choose Alerts.

   2. On the Alerts page, choose Configure Alerts.

   3. In the list of alerts, locate the alert that you want to be notified on and choose it to expand it.

   4. Complete the fields, using the instructions in the following table as a guide. Choose Update.

      Field	Instructions
      Notification: Email	If you want to receive email notifications too, enter the email address of the alert recipient. If your network doesn't allow open relay messages, see Configure Sendmail Relay Server to configure a Sendmail server to relay messages.
      Notification: Web Callback URL	Enter the URL of the appropriate .php file on your web server. This is required if you don't provide an address in the Email field.
      Notify	Select when you want to be notified, either when the alert is raised or when it's cleared. You can choose both options.
      Notes	Add optional notes as needed.

   5. Locate, expand, and complete the fields for each alert of which you want to be notified.

4. Test your setup by typing the following at the command line of the AWS Elemental Statmux node:

   curl -X POST -d "param1=value1&param2=value2" http://yourdomain.com/webcallback/notification.php

5. Open your notify.php to check that it was updated. The text of your file should contain something like this:

   <?xml version="1.0" encoding="UTF-8"?>
   <job href="/jobs/3401">
     <node>earhart</node>
     <user_data></user_data>
     <submitted>2014-11-14 01:27:05 -0800</submitted>
     <priority>50</priority>
     <status>preprocessing</status>
     <pct_complete>0</pct_complete>
     <average_fps>0.0</average_fps>
     <elapsed>0</elapsed>
     <start_time>2014-11-14 01:27:06 -0800</start_time>
     <elapsed_time_in_words>00:00:00</elapsed_time_in_words>
   </job>
   param1=value&param2=value2

6. Enter your web callback URL into a web browser to see the HTTP post.