caddyserver/caddy · error

loading authentication providers: %v

Error message

loading authentication providers: %v

What it means

Error "loading authentication providers: %v" thrown in caddyserver/caddy.

Source

Thrown at modules/caddyhttp/caddyauth/caddyauth.go:81

	logger *zap.Logger
}

// CaddyModule returns the Caddy module information.
func (Authentication) CaddyModule() caddy.ModuleInfo {
	return caddy.ModuleInfo{
		ID:  "http.handlers.authentication",
		New: func() caddy.Module { return new(Authentication) },
	}
}

// Provision sets up an Authentication module by initializing its logger,
// loading and registering all configured authentication providers.
func (a *Authentication) Provision(ctx caddy.Context) error {
	a.logger = ctx.Logger()
	a.Providers = make(map[string]Authenticator)
	mods, err := ctx.LoadModule(a, "ProvidersRaw")
	if err != nil {
		return fmt.Errorf("loading authentication providers: %v", err)
	}
	for modName, modIface := range mods.(map[string]any) {
		a.Providers[modName] = modIface.(Authenticator)
	}
	return nil
}

func (a Authentication) ServeHTTP(w http.ResponseWriter, r *http.Request, next caddyhttp.Handler) error {
	repl := r.Context().Value(caddy.ReplacerCtxKey).(*caddy.Replacer)
	var user User
	var candidate User
	var hasCandidate bool
	var authed bool
	var err error

	// With a single provider there is nothing to isolate it from, so it is
	// given the real ResponseWriter directly — no buffering, and every writer
	// capability (Flusher, Hijacker, Pusher, ReaderFrom, ...) is preserved

View on GitHub (pinned to 50e54ee279)

Solutions

1. Check the wrapped error for the failing authentication provider module and correct its configuration.

When it happens

Trigger: Thrown at modules/caddyhttp/caddyauth/caddyauth.go:81 when the library encounters an invalid state.

Common situations: See trigger scenarios.

Understand the failure class

• Authentication and authorization failures — expired tokens, bad credentials, and missing scopes.

AI-assisted analysis of caddyserver/caddy@50e54ee279 (2026-08-15). Data as JSON: /api/errors/e603c4fdfe2fd80d. Report an issue: GitHub.