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Proxing or Self-hosting

In some cases, our codes can have a custom prefix (also sometimes called a "vanity url"), and in some cases the client wants these scans to be proxied before they're forwarded to the landing-page. In this case it is up to the middleware server to take care of the following:

1. Capture and set the user-agent

When a request is forwarded, set the http-header User-Agent to that of tthe incoming request This is needed to get the right app / user-agent to display in the dashboard

2. Set the forwarding header

When a request is forwarded, set the http-header X-Forwarded-For to the client-IP address of tthe incoming request. The newer header forwarded: for={client-ip} is also supported. This is needed to get the right ip-address to display in the dashboard; in case the location-update API is not called on the client-side, this is the only way to get data about the location of the user.