Function Interceptor

dsl/interceptor.go:29–52

Interceptor defines a request interceptor. Interceptors provide a type-safe way to read and write from and to the request and response. Interceptor must appear in an API, Service or Method expression. Interceptor accepts two arguments: the name of the interceptor and the defining DSL. Example:

(name string, fn ...func())

//	   })
//	})
func Interceptor(name string, fn ...func()) *expr.InterceptorExpr {
	if len(fn) > 1 {
		eval.ReportError("interceptor %q cannot have multiple definitions", name)
		return nil
	}
	i := &expr.InterceptorExpr{Name: name}
	if name == "" {
		eval.ReportError("interceptor name cannot be empty")
		return i
	}
	if len(fn) > 0 {
		if !eval.Execute(fn[0], i) {
			return i
		}
	}
	for _, i := range expr.Root.Interceptors {
		if i.Name == name {
			eval.ReportError("interceptor %q already defined", name)
			return i
		}
	}
	expr.Root.Interceptors = append(expr.Root.Interceptors, i)
	return i
}

// ReadPayload defines the payload attributes read by the interceptor.
//