XTLS/Xray-core · error · errors.Error

malformed proxy host: {host}

Error message

malformed proxy host: {host}

What it means

Error "malformed proxy host: {host}" thrown in XTLS/Xray-core.

Source

Thrown at proxy/http/server.go:150

		}
	}

	errors.LogInfo(ctx, "request to Method [", request.Method, "] Host [", request.Host, "] with URL [", request.URL, "]")
	if err := conn.SetReadDeadline(time.Time{}); err != nil {
		errors.LogDebugInner(ctx, err, "failed to clear read deadline")
	}

	defaultPort := net.Port(80)
	if strings.EqualFold(request.URL.Scheme, "https") {
		defaultPort = net.Port(443)
	}
	host := request.Host
	if host == "" {
		host = request.URL.Host
	}
	dest, err := http_proto.ParseHost(host, defaultPort)
	if err != nil {
		return errors.New("malformed proxy host: ", host).AtWarning().Base(err)
	}
	ctx = log.ContextWithAccessMessage(ctx, &log.AccessMessage{
		From:   conn.RemoteAddr(),
		To:     request.URL,
		Status: log.AccessAccepted,
		Reason: "",
	})

	if strings.EqualFold(request.Method, "CONNECT") {
		return s.handleConnect(ctx, request, reader, conn, dest, dispatcher, inbound)
	}

	keepAlive := (strings.TrimSpace(strings.ToLower(request.Header.Get("Proxy-Connection"))) == "keep-alive")

	err = s.handlePlainHTTP(ctx, request, conn, dest, dispatcher)
	if err == errWaitAnother {
		if keepAlive {
			goto Start

View on GitHub (pinned to 7d214f8b09)

When it happens

Trigger: Thrown at proxy/http/server.go:150 when the library encounters an invalid state.

Common situations: See trigger scenarios.

Understand the failure class

• Parsing and encoding errors: unexpected token, malformed input — why parsers reject input and how to find the real culprit.

AI-assisted analysis of XTLS/Xray-core@7d214f8b09 (2026-08-15). Data as JSON: /api/errors/f33d2b47498b8ce5. Report an issue: GitHub.