A modern programming language that makes developers happier.

kotlinlang

I was looking at the way <https://www.http4k.org/guide/howto/use_html_forms/|HTML forms> are handled and I was wondering if there is a way to use a Bidi Lens for converting the request to an object? This would be particularly useful for larger forms with multiple fields, or when validation needs to be done on the form object as a whole, for example.

`BiDiLensSpec.composite()` is probably what you're after.

<https://github.com/http4k/http4k/blob/eb3a2659a81fa2b04ec3d1808844d253625a2abd/http4k-core/src/main/kotlin/org/http4k/filter/ZipkinTraces.kt#L66> shows an example from the http4 source code.

Interesting, I'll give that a go, thanks!

FYI, this might be a red herring, I couldn't quite figure out how and where this would be wired to parse a response dynamically (based on the type of the form class)

I'll raise a feature request for this particular thing. It might not be critical, but it would be nice to have something like:
```Body.webForm&lt;MyFormObject&gt;().toLens()(request) ```
or something to that effect. Parsing/configuring individual field lenses isn't always feasible.