Alternatives for HttpServletRequest and HttpServletResponse in Micronaut

Question

I am playing with Micronaut and what I currently miss is access to HttpServletRequest and HttpServletResponse. These normally allow to access things like:

• request parameters
• input/output stream (especially writing directly to output stream)
• getting/setting cookies
• getting/setting headers
• getting client IP

Also I am not sure about alternatives for:

• @RequestParam files: List<MultipartFile>
• @RequestBody myClass: MyClass

Answer 1

https://docs.micronaut.io/latest/guide/index.html#requestResponse and https://docs.micronaut.io/latest/guide/index.html#binding shows how to bind to request parameters, cookies, headers, etc.

https://docs.micronaut.io/latest/guide/index.html#uploads shows how to handle file uploads.

input/output stream (especially writing directly to output stream)

Micronaut does things differently so you don't have access to a stream to write to. You can return a reactive type to have your data pushed to the response as soon as it's available.

getting client IP

Typically available via the host header or https://docs.micronaut.io/latest/api/io/micronaut/http/HttpRequest.html#getRemoteAddress--

Edit: Sending an XML file chunked

@Get(uri = "/xml", produces = MediaType.TEXT_XML)
Flowable<String> getXml() {
    return Flowable.create(emitter -> {
        emitter.onNext("<<xml header>>");
        //do some work
        emitter.onNext("more xml");
        emitter.onNext("<<xml footer>>");
    }, BackpressureStrategy.BUFFER);
}