getTLSConfig() — fiber Function Reference

Architecture documentation for the getTLSConfig() function in helpers.go from the fiber codebase.

Function go FiberCore Context

Entity Profile

FiberCore→ Context→ getTLSConfig() — fiber Function Reference

Dependency Diagram

graph TD
  efae1809_5c25_1c98_9578_477fd00968bd["getTLSConfig()"]
  bec0e401_e4cd_f765_6df3_a79059073e50["helpers.go"]
  efae1809_5c25_1c98_9578_477fd00968bd -->|defined in| bec0e401_e4cd_f765_6df3_a79059073e50
  style efae1809_5c25_1c98_9578_477fd00968bd fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

helpers.go lines 55–118

func getTLSConfig(ln net.Listener) *tls.Config {
	if ln == nil {
		return nil
	}

	type tlsConfigProvider interface {
		TLSConfig() *tls.Config
	}

	type configProvider interface {
		Config() *tls.Config
	}

	if provider, ok := ln.(tlsConfigProvider); ok {
		return provider.TLSConfig()
	}

	if provider, ok := ln.(configProvider); ok {
		return provider.Config()
	}

	pointer := reflect.ValueOf(ln)
	if !pointer.IsValid() {
		return nil
	}

	// Reflection fallback for listeners that do not expose a TLS config method.
	val := reflect.Indirect(pointer)
	if !val.IsValid() {
		return nil
	}

	field := val.FieldByName("config")
	if !field.IsValid() {
		return nil
	}

	if field.Type() != reflect.TypeFor[*tls.Config]() {
		return nil
	}

	if field.CanInterface() {
		if cfg, ok := field.Interface().(*tls.Config); ok {
			return cfg
		}
		return nil
	}

	if !field.CanAddr() {
		return nil
	}

	value := reflect.NewAt(field.Type(), unsafe.Pointer(field.UnsafeAddr())).Elem() //nolint:gosec // Access to unexported field is required for listeners that don't expose TLS config methods.
	if !value.IsValid() {
		return nil
	}

	cfg, ok := value.Interface().(*tls.Config)
	if !ok {
		return nil
	}

	return cfg
}