# Synapse-Client- und Federation-API. Synapse selbst lauscht nur auf
# 127.0.0.1:8008; TLS und Port 443 macht nginx.
server {
    listen 80;
    listen [::]:80;
    server_name matrix.example.com;
    location /.well-known/acme-challenge/ { root /var/www/html; }
    location / { return 301 https://$host$request_uri; }
}

server {
    listen 443 ssl;
    listen [::]:443 ssl;
    http2 on;
    server_name matrix.example.com;

    ssl_certificate     /etc/letsencrypt/live/matrix.example.com/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/matrix.example.com/privkey.pem;
    include /etc/letsencrypt/options-ssl-nginx.conf;
    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem;

    # Muss mindestens so gross sein wie max_upload_size in Synapse.
    client_max_body_size 100M;

    location ~ ^(/_matrix|/_synapse/client) {
        proxy_pass http://127.0.0.1:8008;
        proxy_set_header X-Forwarded-For $remote_addr;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_set_header Host $host;
        proxy_http_version 1.1;
        # Long-Polling (/sync) darf nicht nach 60s abgeschnitten werden.
        proxy_read_timeout 3600s;
        proxy_send_timeout 3600s;
        proxy_buffering off;
    }

    location / {
        return 200 'Matrix homeserver. Web client: https://element.example.com\n';
        default_type text/plain;
    }
}