BoundaryML/baml · error

failed to get URL: %w

Error message

failed to get URL: %w

What it means

httpRequest.Url() invokes the runtime object's 'url' method via the raw-objects bridge. 'failed to get URL: %w' means the bridge call failed — the runtime object could not execute 'url', so no URL value was produced.

Source

Thrown at engine/language_client_go/pkg/rawobjects_http_request.go:44

func (h *httpRequest) RequestId() (string, error) {
	result, err := raw_objects.CallMethod(h, "id", nil)
	if err != nil {
		return "", fmt.Errorf("failed to get ID: %w", err)
	}

	id, ok := result.(string)
	if !ok {
		return "", fmt.Errorf("unexpected type for ID: %T", result)
	}

	return id, nil
}

func (h *httpRequest) Url() (string, error) {
	result, err := raw_objects.CallMethod(h, "url", nil)
	if err != nil {
		return "", fmt.Errorf("failed to get URL: %w", err)
	}

	url, ok := result.(string)
	if !ok {
		return "", fmt.Errorf("unexpected type for URL: %T", result)
	}

	return url, nil
}

func (h *httpRequest) Method() (string, error) {
	result, err := raw_objects.CallMethod(h, "method", nil)
	if err != nil {
		return "", fmt.Errorf("failed to get method: %w", err)
	}

	method, ok := result.(string)
	if !ok {

View on GitHub (pinned to bd85ce9dee)

Solutions

1. Inspect the wrapped cause (%w) to identify the underlying failure
2. Ensure the request object is used within the same dispatch/lifecycle it was created in
3. Confirm the runtime exposes a working 'url' method for this request kind
4. Re-dispatch the request if the object is stale

if req == nil { return errors.New("request unavailable") }

func (h *httpRequest) hasURL() bool { return h != nil && h.RawObject != nil }

u, err := req.Url()
if err != nil {
    return fmt.Errorf("cannot read request URL: %w", err)
}

When it happens

Trigger: Calling Url() on a request whose backing raw object is invalid or detached, or whose 'url' method raises in the runtime.

Common situations: Using a request object after runtime disposal; handler scripts that error while computing the URL; API changes between client and runtime versions.

Related errors

• failed to get JSON: %w
• failed to get ID: %w
• unexpected type for URL: %T
• failed to get method: %w
• failed to get headers: %w

AI-assisted analysis of BoundaryML/baml@bd85ce9dee (2026-09-12). Data as JSON: /api/errors/90c692a532ce7027. Report an issue: GitHub.