Nginx Session Handler Laravel Package

Getting Started

This package is not a Laravel session driver. Despite the name, it parses the binary session files written by nginx's ngx_http_session_log_module — the module that groups requests from one client into a "session" (request count, bytes sent, duration, user agent, referer, etc.). Treat it as an analytics/ingestion library, not as a drop-in replacement for SESSION_DRIVER=file.

Minimal steps:

1. composer require mrsuh/nginx-session-handler
2. Enable the nginx module and point it at a directory Laravel can read, e.g.:

   session_log zone=client_sessions:1m path=/var/log/nginx/sessions format=json;
   

3. Read the README first — the public API is tiny (a handler + a session value object). Check src/ for the exact class names and the getSession()/iteration methods; the repo is small enough to read end-to-end in ten minutes.

First use case worth wiring up: an Artisan command that parses a session log file and dumps sessions into a table, so you can answer "how many requests and bytes did each client session generate in the last hour?" without standing up a separate analytics stack.

// app/Console/Commands/ImportNginxSessions.php
$handler = new \Mrsuh\NginxSessionHandler\Handler($this->argument('path'));
foreach ($handler as $session) {
    NginxSession::create([
        'client_ip'   => $session->getClientIp(),   // verify method names in src/
        'requests'    => $session->getRequests(),
        'bytes_sent'  => $session->getBytesSent(),
        'started_at'  => $session->getStartTime(),
    ]);
}

Implementation Patterns

Wrap it in a service, not a controller. Create app/Services/NginxSessionParser.php that owns the handler and returns Laravel DTOs or Eloquent models. Keep the third-party classes on the boundary so the package's API never leaks into your app.

Stream, don't slurp. Session logs grow fast. Iterate the handler session-by-session and chunk() inserts into the DB (e.g. 500 rows per insert()), rather than collecting everything into an array.

Queue the ingestion. A ProcessNginxSessionLog job dispatched from a scheduled command keeps the heavy parse off the request path:

$schedule->command('nginx:import-sessions')
         ->everyFiveMinutes()
         ->withoutOverlapping();

Rotate by byte offset. Store the last-parsed filename + offset in a settings table and resume from there on the next run. Nginx rotation creates new files, so track filename and offset, not just offset.

Join with your own data. The highest-value pattern is joining by IP + time window against login events or orders to attribute traffic to real users. Store the raw parsed session in a nginx_sessions table with an index on (client_ip, started_at) for this.

Debug view. Add a GET /admin/sessions/{id} route that reads one file and renders a parsed session — invaluable for verifying format changes after an nginx upgrade.

Gotchas and Tips

• The name is a trap. New team members will assume it's SessionHandlerInterface. Add a one-line comment in composer.json or a README note in your app so nobody wires it into config/session.php.
• Format is version-dependent. The nginx session_log binary layout has shifted across nginx versions. Upgrade nginx, re-test your parser; a silent truncation or garbage field is the usual symptom.
• Partial files. Nginx writes as it goes. A session file that's still open may have an incomplete trailing record — catch parse exceptions per file and skip, don't abort the whole import.
• Permissions. Logs are typically 640 nginx:adm. Either add the PHP-FPM user to adm or ship a log-shipper; don't chmod 777 the log dir.
• Timezones. Session timestamps are usually epoch/UTC. Cast explicitly and store in UTC; don't let MySQL guess.
• Memory ceiling on cold parses. For a first backfill, split large files with split -l or process one file per job; memory_limit exhaustion is the most common failure.
• Maintenance risk. Zero stars, last release May 2023, no dependents. Vendor the parsing logic if the format is stable, and pin the exact version in composer.json. Add a unit test with a checked-in sample log file so a future nginx upgrade fails loudly in CI rather than silently corrupting analytics.
• Extension point to watch. The handler is the only seam — if you need new fields, subclass it rather than editing vendor/; the class is small enough that fork-and-own is a legitimate long-term option.