Add ability to set CORS allow-list in n8n webhooks

Feature Requests (done)
,
7

If anyone stumbles upon this, I’ve worked around the cors limitations by setting up a super simple docker nginx container that proxies traffic through to n8n with cors enabled:

# default.conf
# replace variables with actual host/port names
# ${NGINX_UPSTREAM_HOST}:${NGINX_UPSTREAM_PORT}



server {
listen 80;

location / {

    # add cors headers
    if ($request_method = 'OPTIONS') {
    add_header 'Access-Control-Allow-Origin' '*';
    add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
    #
    # Custom headers and headers various browsers *should* be OK with but aren't
    #
    add_header 'Access-Control-Allow-Headers' 'DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range';
    #
    # Tell client that this pre-flight info is valid for 20 days
    #
    add_header 'Access-Control-Max-Age' 1728000;
    add_header 'Content-Type' 'text/plain; charset=utf-8';
    add_header 'Content-Length' 0;
    return 204;
    }
    if ($request_method = 'POST') {
    add_header 'Access-Control-Allow-Origin' '*' always;
    add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS' always;
    add_header 'Access-Control-Allow-Headers' 'DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range' always;
    add_header 'Access-Control-Expose-Headers' 'Content-Length,Content-Range' always;
    }
    if ($request_method = 'GET') {
    add_header 'Access-Control-Allow-Origin' '*' always;
    add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS' always;
    add_header 'Access-Control-Allow-Headers' 'DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range' always;
    add_header 'Access-Control-Expose-Headers' 'Content-Length,Content-Range' always;
    }

    # Only requests matching the whitelist expectations will
    # get sent to the application server
    proxy_pass http://${NGINX_UPSTREAM_HOST}:${NGINX_UPSTREAM_PORT};
    proxy_http_version 1.1;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection 'upgrade';
    proxy_set_header Host $host;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_cache_bypass $http_upgrade;
}
}
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