Hi,

For configuring auth_backend & inserting ads on PHP needed to create an external web server, for example, nginx

# install php and nginx
apt update
apt install nginx php7.2-fpm


# type next command:

nano /etc/nginx/sites-available/auth_backend

# Ctrl+O - for save file
# Ctrl+X - close editor

# copy in here follow code:

server {
        listen 80;
        server_name <BACKEND_SITE_DOMAIN>;

        root /var/www/auth_backend/;

        index index.php;

        location ~ \.php$ {
                try_files $uri =404;
                include /etc/nginx/fastcgi.conf;
                fastcgi_pass unix:/run/php/php7.2-fpm.sock;
        }
    }

# Create a directory for the site and put here auth_backend script

mkdir /var/www/auth_backend

nano /var/www/auth_backend/auth_backend.php

<?php

# auth_backend code

$get = print_r($_GET, true);
$token = $_GET["token"];
if(!$token || !strlen($token)) {
    header('HTTP/1.0 403 Forbidden');
    error_log("No token provided", 4);
    die();
}

$tokens = array();
$contents = explode("\n", file_get_contents("auth.txt"));
foreach($contents as $line) {
    if(strlen($line) > 3) {
        $parts = explode(":", $line);
        $tokens[$parts[1]] = $parts[0];
    }
}


if($tokens[$token]) {
    header("HTTP/1.0 200 OK");
    header("X-UserId: ".$tokens[$token]."\r\n");
#    header("X-Max-Sessions: 5\r\n"); // Turn this on to protect from multiscreen
} else {
    header('HTTP/1.0 403 Forbidden');
}

# code to insert ads

header('Content-type: application/json');

$user_ads = [
    "preroll" => "vod/bunny.mp4",
    "midroll_interval" => 180,
    "midroll" => ["vod/bunny.mp4", "vod/bunny.mp4"]
];

echo json_encode(array("ad_inject" => $user_ads));
?>

# Ctrl+O - for save file
# Ctrl+X - close editor

# File with tokens and users:

nano /var/www/auth_backend/auth.txt

user1:token1
user2:token2
user3:token3

# Ctrl+O - for save file
# Ctrl+X - close editor

# For apply changes restart nginx
service nginx restart

# For test perform follow command:

curl -v http://<BACKEND_SITE_DOMAIN>/auth_backend.php

*   Trying 127.0.1.1...
* TCP_NODELAY set
* Connected to an1.e (127.0.1.1) port 8080 (#0)
> GET /auth_backend.php HTTP/1.1
> Host: <BACKEND_SITE_DOMAIN>
> User-Agent: curl/7.58.0
> Accept: */*
>
< HTTP/1.1 403 Forbidden
< Server: nginx/1.14.0 (Ubuntu)
< Date: Sat, 18 May 2019 07:51:33 GMT
< Content-Type: text/html; charset=UTF-8
< Transfer-Encoding: chunked
< Connection: keep-alive


# Configure the Flussonic, 

nano /etc/flussonic/flussonic.conf

# type here following code:

auth_backend main {
  backend http://<BACKEND_SITE_DOMAIN>/auth_backend.php;
}

stream ads_insert {
  url fake://fake;
  auth auth://main;
}

# apply Flussonic configuration

service flussonic reload


# For test open url

http://flussonic-ip/ads_insert/embed.html?token=token1