vertx / io.vertx.reactivex.core.http / HttpClientRequest / continueHandler

# continueHandler

`open fun continueHandler(handler: Handler<Void>): HttpClientRequest`

If you send an HTTP request with the header `Expect` set to the value `100-continue` and the server responds with an interim HTTP response with a status code of `100` and a continue handler has been set using this method, then the `handler` will be called.

You can then continue to write data to the request body and later end it. This is normally used in conjunction with the `io.vertx.reactivex.core.http.HttpClientRequest#sendHead` method to force the request header to be written before the request has ended.

### Parameters

`handler` -

Return
a reference to this, so the API can be used fluently