Function headers

dsl/http.go:1128–1155

headers returns the mapped attribute containing the headers for the given expression if it's either the root, a service or an endpoint - nil otherwise.

(exp eval.Expression)

// headers returns the mapped attribute containing the headers for the given
// expression if it's either the root, a service or an endpoint - nil otherwise.
func headers(exp eval.Expression) *expr.MappedAttributeExpr {
	switch e := exp.(type) {
	case *expr.RootExpr:
		if e.API.HTTP.Headers == nil {
			e.API.HTTP.Headers = expr.NewEmptyMappedAttributeExpr()
		}
		return e.API.HTTP.Headers
	case *expr.HTTPServiceExpr:
		if e.Headers == nil {
			e.Headers = expr.NewEmptyMappedAttributeExpr()
		}
		return e.Headers
	case *expr.HTTPEndpointExpr:
		if e.Headers == nil {
			e.Headers = expr.NewEmptyMappedAttributeExpr()
		}
		return e.Headers
	case *expr.HTTPResponseExpr:
		if e.Headers == nil {
			e.Headers = expr.NewEmptyMappedAttributeExpr()
		}
		return e.Headers
	case *expr.MappedAttributeExpr:
		return e
	default:
		return nil
	}
}

// cookies returns the mapped attribute containing the cookies for the given
// expression if it's either the root, a service or an endpoint - nil otherwise.