404 Error on `GET /api/config`

[madushanTHAMB]

Issue: 404 Error on GET /api/config

Hello guys !

Description

I am encountering a 404 Not Found error when attempting to access /api/config on the frontend of the nfsen-ng web interface. The backend is functioning correctly, and I can successfully parse files, generate nfcapd files daily, and create RRD files without any issues. However, the frontend fails to retrieve the configuration from the /api/config endpoint.

---

Environment and Setup

OS and Web Server

• OS: Arch Linux
• Web Server: Apache (httpd)
• PHP Version: 8.3

nfsen-ng Setup

• Repository: Cloned into /data/nfsen-ng/
• Frontend: Located in /data/nfsen-ng/frontend/
• Backend: Located in /data/nfsen-ng/backend/
• RRD Files: Located in /data/nfsen-ng/backend/datasources/data
• NFCAPD Files: Generated in /data/nfsen-ng/profiles-data/

---

Current Configuration

Apache Configuration (httpd.conf)

<VirtualHost *:80>
    ServerName localhost
    DocumentRoot /data/nfsen-ng/frontend

    # Alias pour le frontend
    Alias /nfsen-ng/ /data/nfsen-ng/frontend/

    <Directory /data/nfsen-ng/frontend/>
        AllowOverride All
        Require all granted
    </Directory>

    # Configuration pour le backend (nécessaire pour les réécritures définies dans .htaccess)
    <Directory /data/nfsen-ng/backend/>
        AllowOverride All
        Require all granted
    </Directory>

    # Journaux personnalisés pour déboguer
    ErrorLog /var/log/httpd/nfsen-ng-error.log
    CustomLog /var/log/httpd/nfsen-ng-access.log combined

    # Définir le niveau des logs pour le débogage des réécritures
    LogLevel alert rewrite:trace3
</VirtualHost>

nfsen-ng Settings (settings.php):

<?php

$nfsen_config = [
    'general' => [
        'filters' => [
            'proto udp',
            'proto tcp',
        ],
        'formats' => [
            'external_interfaces' => '%ts %td %pr %in %out %sa %sp %da %dp %ipkt %ibyt %opkt %obyt %flg',
        ],
        'db' => 'RRD',
        'processor' => 'NfDump',
        'ports' => [],
        'stored_output_formats' => [],
        'stored_filters' => [],
        'sources' => [
            'PFC_CHA',
        ],        
    ],
    'frontend' => [
        'reload_interval' => 60,
        'defaults' => [
            'view' => 'graphs',
            'graphs' => [
                'display' => 'sources',
                'datatype' => 'flows',
                'protocols' => ['any'],
            ],
            'flows' => [
                'limit' => 50,
            ],
            'statistics' => [
                'order_by' => 'bytes',
            ],
            'table' => [
                'hidden_fields' => [
                    'flg', 'fwd', 'in', 'out', 'sas', 'das'
                ],
            ],
        ],
    ],
    'nfdump' => [
        'binary' => '/usr/local/bin/nfdump',
        'profiles-data' => '/data/nfsen-ng/profiles-data/',
        'profile' => 'live',
        'max-processes' => 10,
    ],
    'log' => [
        'priority' => \LOG_INFO,
    ],
];

Apache Modules - The following modules are enabled:

rewrite_module (shared)
deflate_module (shared)
expires_module (shared)
php_module (shared)

My nfcapd command:

/usr/local/bin/nfcapd -vv -D -p 9995 -B 20971520 -S 1 -P /data/nfsen-ng/var/run/p9995.pid -z=lz4 -t 300 -I PFC_CHA -w /data/nfsen-ng/profiles-data/live/PFC_CHA -T all

Frontend Error:

On the web interface, the /api/config endpoint returns a 404 Not Found.
The following error is observed in the browser console:
GET http://X.X.X.X/api/config 404 (Not Found)

It's been 2 days i'm on it and i can't find any solution in the issues, is it maybe because i'm not putting the files in /var/www/html ? I don't really know, so if you could help me i'll be great :)
Thanks !

[mbolli]

Try with

<Directory /data/nfsen-ng/>
    AllowOverride All
    Require all granted
</Directory>

instead of

    <Directory /data/nfsen-ng/frontend/>
        AllowOverride All
        Require all granted
    </Directory>

    # Configuration pour le backend (nécessaire pour les réécritures définies dans .htaccess)
    <Directory /data/nfsen-ng/backend/>
        AllowOverride All
        Require all granted
    </Directory>

[madushanTHAMB]

Hello sir !

I tried it but always the same, i restart httpd and nfsen-ng to make sure but same.

with your change my httpd_conf was this :

<VirtualHost *:80>
ServerName localhost
DocumentRoot /data/nfsen-ng/frontend

# Alias pour le frontend
Alias /nfsen-ng/ /data/nfsen-ng/frontend/

<Directory /data/nfsen-ng/>
    AllowOverride All
    Require all granted
</Directory>
# Journaux personnalisés pour déboguer
ErrorLog /var/log/httpd/nfsen-ng-error.log
CustomLog /var/log/httpd/nfsen-ng-access.log combined

# Définir le niveau des logs pour le débogage des réécritures
LogLevel alert rewrite:trace3

I tried a lot of things but i don't know why it is so complicated, people had no a lot of problem

Thank you for your help

[mbolli]

what does it say if you create a file phpinfo.php with content <?php phpinfo();?> and open it in the browser?

[madushanTHAMB]

I already did this to see if it's taking my php:

Do i need to give you more informations about this page ?

I can give you informations about what it's scanning or done as data:

[mbolli]

Well this is weird. The api/config endpoint should be rewritten using mod rewrite. This is probably not happening, and that's why it results in a 404. Are you 100% sure the module is enabled? Do you have anything else in the logs which could explain this behavior? Can you test mod_rewrite with another RedirectRule, e.g. to redirect everything to google.com?

[madushanTHAMB]

Hello !
I have nothing in the logs, no error log.

For the backend i have create a service(i always restart everything to run) :

cat /etc/systemd/system/nfsen-ng.service

[Unit]
Description=nfsen-ng
After=network-online.target

[Service]
Type=simple
RemainAfterExit=yes
Restart=always
StartLimitIntervalSec=0
RestartSec=2
ExecStart=su - http --shell=/bin/bash -c '/data/nfsen-ng/backend/cli.php start'
ExecStop=su - http --shell=/bin/bash -c '/data/nfsen-ng/backend/cli.php stop'

[Install]
WantedBy=multi-user.target

Here is my module rewrite :

So i test for the rewrite, it works with that configuration it redirect me to google:

<VirtualHost *:80>
    ServerName localhost
    DocumentRoot /data/nfsen-ng/frontend

    # Alias pour le frontend
    Alias /nfsen-ng/ /data/nfsen-ng/frontend/

    <Directory /data/nfsen-ng/frontend/>
        AllowOverride All
        Require all granted
    </Directory>

    # Test de réécriture
    RewriteEngine On
    RewriteRule ^.*$ https://www.google.com [R=301,L]

    ErrorLog /var/log/httpd/nfsen-ng-error.log
    CustomLog /var/log/httpd/nfsen-ng-access.log combined
</VirtualHost>

[mbolli]

hmm does the test rewrite also work in the .htaccess in the nfsen-ng folder?

[madushanTHAMB]

I tried this( i delete from the redirection from the httpd_conf):

It's not redirecting to google !

[mbolli]

can you remove <IfModule> around the rules?

[madushanTHAMB]

I tried this :

But same

[mbolli]

you still need to have <Directory /data/nfsen-ng/> in the virtual host.

[madushanTHAMB]

I didn't touch this file :

I don't really wanna bother you with that aha

[mbolli]

yes but it needs to AllowOverride the .htaccess which is in /data/nfsen-ng - not in /data/nfsen-ng/frontend.

[madushanTHAMB]

Ok the error change :

with that configuration as you said:

<VirtualHost *:80>
    ServerName localhost
    DocumentRoot /data/nfsen-ng/frontend

    # Alias pour le frontend
    Alias /nfsen-ng/ /data/nfsen-ng/frontend/

    <Directory /data/nfsen-ng/>
        AllowOverride All
        Require all granted
    </Directory>

    ErrorLog /var/log/httpd/nfsen-ng-error.log
    CustomLog /var/log/httpd/nfsen-ng-access.log combined
</VirtualHost>

So the redirect to google "works" because he tries to expose /api/config to www.google.com

[mbolli]

yes, nice. what happens now if you remove the redirect to google?