ip

var (
	// CFConnectingIP is an HeaderParser.
	// https://support.cloudflare.com/hc/en-us/articles/206776727-What-is-True-Client-IP-
	CFConnectingIP = HeaderParser{"CF-Connecting-IP", parseXForwardedForHeader}

	// TrueClientIP is an HeaderParser.
	TrueClientIP = HeaderParser{"True-Client-IP", parseXForwardedForHeader}

	// XForwardedFor is an HeaderParser.
	XForwardedFor = HeaderParser{"X-Forwarded-For", parseXForwardedForHeader}

	// Forwarded is an HeaderParser.
	Forwarded = HeaderParser{"Forwarded", parseForwardedHeader}

	// XRealIP is an HeaderParser.
	XRealIP = HeaderParser{"X-Real-IP", parseXRealIPHeader}

	// DefaultHeaderParser is a list of headers and corresponding parsers to look up the real client IP.
	// They will be check in order, the first non-empty one will be picked,
	// or else the remote address is selected.
	DefaultHeaderParser = []HeaderParser{
		CFConnectingIP,
		TrueClientIP,
		XForwardedFor,
		Forwarded,
		XRealIP,
	}
)