Nginx redirect a specific subdomain to specific location

Question

I would like it so that when a user types task-manager.example.com, they are automatically redirected to location /api/ without having to type out the full path of task-manager.example.com/api. Only task-manager.example.com should get redirected to location /api/

For example.com and www.example.com, I want all requests to be directed to location / regardless of whether the user types example.com/api or not. Any requests to example.com/api or www.example.com/api should be automatically redirected to example.com/ or www.example.com/.

Can Nginx be configured to achieve this functionality?

Here is my current configuration:

server
{
    server_name example.com www.example.com task-manager.example.com;

    location /
    {
        # Frontend application
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;

        proxy_pass http://localhost:9091;
    }

    location /api/
    {
        # Backend application
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;

        proxy_pass http://localhost:9090;
    }

    # some Certbot SSL configuration ...
}

server
{
    if ($host = www.example.com) {
        return 301 https://$host/;
    } # managed by Certbo


    if ($host = example.com) {
        return 301 https://$host/;
    } # managed by Certbo


    if ($host = task-manager.example.com) {
        return 301 https://$host/api;
    } # managed by Certbo


    listen 80 default_server;
    listen [::]:80 default_server;
    server_name example.com www.example.com task-manager.example.com;
    return 404; # managed by Certbot
}

score 1 · Answer 1 · answered Feb 24 '23 at 21:55

I was able to solve my issue by moving the if conditions to the relevant location blocks. This allowed me to specify redirects for specific hosts to go to specific URIs.

This is my new config:

server
{
    server_name example.com www.example.com task-manager.example.com;

    location /
    {
        if ($host = task-manager.example.com) {
            return 301 /api;
        }

        # Frontend application
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;

        proxy_pass http://localhost:9091;
    }

    location /api/
    {

        if ($host = www.example.com) {
            return 301 /;
        }

        if ($host = example.com) {
            return 301 /;
        }

        # Backend application
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;

        proxy_pass http://localhost:9090;
    }

    # here is usually some Certbot SSL configuration ...
}

server
{
    listen 80 default_server;
    listen [::]:80 default_server;
    server_name example.com www.example.com task-manager.example.com;
    return 301 https://$host$request_uri;
}

Nginx redirect a specific subdomain to specific location

1 Answers1