httpd_wrapper:http

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Predicate http_peer/2

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http
- http

http_peer(+Request, -PeerIP:atom) is semidet

True when PeerIP is the IP address of the connection peer. If the connection is established via a proxy or CDN we try to find the initiating peer. Currently supports:

Fastly-client-ip
X-real-ip
X-forwarded-for
Direct connections

bug: - The X-forwarded-for header is problematic. According to Wikipedia, the original client is the first, while according to AWS it is the last.