Function firstToken

core/http/middleware/baseurl.go:91–96

firstToken returns the first comma-separated token of v, trimmed of spaces. Reverse-proxy chains can emit X-Forwarded-Proto as "https,http"; only the first hop (closest to the client) is meaningful for scheme detection.

(v string)

// Reverse-proxy chains can emit X-Forwarded-Proto as "https,http"; only the
// first hop (closest to the client) is meaningful for scheme detection.
func firstToken(v string) string {
	if i := strings.IndexByte(v, ','); i >= 0 {
		v = v[:i]
	}
	return strings.TrimSpace(v)
}

// parseForwarded extracts the proto and host directives from the first element
// of an RFC 7239 Forwarded header (e.g. `for=x;proto=https;host=h, for=y`).