Hey, I've got a question about the new Spring Rout...

# spring

[cpe]

Hey, I've got a question about the new Spring Router DSL.
I am migrating an application from the traditional Mappings and struggling on a POST from a web form containing an array for a value, let's say like this:

<form name="users" action="POST">
<input type="text" name="someInfo">
<input type="text" name="users[name][0]">
<input type="text" name="users[surname][0]">
<input type="text" name="users[name][1]">
<input type="text" name="users[surname][1]">
</form>

data class InputForm(val someInfo: String, val users: Map<String, List<String>)

which could be wired like this:

@PostMapping("/users")
fun updateUsers(inputForm: InputForm) {
  // access input form data like "someInfo" and the map "user"
}

With the migration I have something like:

router {
  POST("/users", userController::updateUsers)
}

fun updateUsers(request: ServerRequest): ServerResponse {
  val inputForm = request.body<InputForm>()
  // do some stuff
  return ServerResponse.ok().render("success.html")
}

This is causing the following exception: org.springframework.web.HttpMediaTypeNotSupportedException: Content type 'application/x-www-form-urlencoded;charset=UTF-8' not supported

What is the correct way to read the message in an automated way like it was possible with the traditional mapping? Or do I need to write a custom HttpMessageConverter?

[mister11]

If you are retrieving data from form, then you want to use request.formData() instead of request.body().

[cpe]

That would be nice, but there is no such function.

[cpe]

Seems that this is something that WebFlux has inside its DefaultServerRequest but WebMVC not.

[sdeleuze]

Try request.params()

[cpe]

I already tried that, but with val params: MultiValueMap<String, String> = request.params() the form data is not converted into the target class. I could write a workaround for parsing the plain parameters to a map, but that was supported out of with the common, non-functional style.

[sdeleuze]

Ok let me check

[sdeleuze]

I have asked a feedback from Arjen Poutsma who developed that feature, I will forward you his feedback.

[cpe]

Thank you very much for your support!

[sdeleuze]

So we are going to improve the documentation to make the request.params() more discoverable.

For your need, I think what you want is data binding which is bot supported on WebFlux and WebMvc functional API. Feel free to create an issue if you care.