is there any way to achieve zero copy deserialization

[Hydrostic]

In the framework I used previously, I could lazily extract data from the body using the builtin method. However, in ntex, there seems to be no way to achieve this simply. I wonder if ntex provides such a method or do I have to implement it myself?

[fafhrd91]

could you explain what is “lazily extract”?

[Hydrostic]

i.e. extract in the handler. But actually it seems I have mistaken the idea of zero copy deserialzation, actually I want some method that bind the lifetime to Deseralize<'de> that can help to write code like below:

pub struct Data<'a>{
   text: Cow<'a, str>
}

[fafhrd91]

you need to load body in any case, then you can do whatever you need

[Hydrostic]

But why the builtin extractor is designed to only support self-owned struct, I wonder if changing the generic lifetime to below would be a better approach

impl<'de, T, Err: ErrorRenderer> FromRequest<Err> for Json<T>
where
    T: Deserialize<'de>
{

[fafhrd91]

lifetime would complicate definition

[fafhrd91]

you can always take Payload and use whatever extraction method you need

[Hydrostic]

Ok, Thanks