27 lines
833 B
Go
27 lines
833 B
Go
package controller
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import (
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"arimelody-web/model"
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"net/http"
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"slices"
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"strings"
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)
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// Returns the request's original IP address, resolving the `x-forwarded-for`
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// header if the request originates from a trusted proxy.
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func ResolveIP(app *model.AppState, r *http.Request) string {
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iSplit := strings.LastIndex(r.RemoteAddr, ":")
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addr := r.RemoteAddr[0:iSplit]
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if slices.Contains(app.Config.TrustedProxies, addr) {
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forwardedFor := r.Header.Get("x-forwarded-for")
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if len(forwardedFor) > 0 {
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// discard extra IPs; cloudflare tends to append their nodes
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forwardedFor = strings.Split(forwardedFor, ", ")[0]
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addr = forwardedFor
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}
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}
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if addr[0] == '[' && addr[len(addr) - 1] == ']' {
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addr = addr[1:len(addr) - 1]
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}
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return addr
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}
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