@Mehdi you can use a composite to extract the values like so:

fun main() {
    data class Pageable(val sortAscending: Boolean, val page: Int, val maxResults: Int)

    val lens = Query.composite {
        Pageable(
            boolean().defaulted("sortAscending", true)(it),
            int().defaulted("page", 1)(it),
            int().defaulted("maxResults", 20)(it)
        )
    }

    println(lens(Request(GET, "/list?page=1")))
    // Pageable(sortAscending=true, page=1, maxResults=20)
}

not an http4k bug per se but something to consider when building executable jars with Jetty in http4k

Hi all, we are using http4k-contract and we were wondering if there is a way to add a description to a definition property. As the properties are inferred from the response data class, we thought perhaps there is an annotation or equivalent that we could use?

you just need to add the person/xsd one first because otherwise the wildcard will match

Is it possible to use coroutines ? I have to do a large insert after calling an endpoint but i want to return the a Status.OK after i validate the data and not wait for the data to be inserted.

How to add a custom filter similar to BasicAuth into ServerFilters?

question 1: is there some example to copy on managing the cookie storage for http4k client? we made it works but I think it should be kind of simpler than the code we've written

question 2: when doing local testing, we start alll our microservices on local host with different ports. To make the services correctly calling each other we keep a map of the ports and set all the hostname to localhost. So far so good... now we are toying with the idea of not starting the servers (sockets and all), but just connecting the httpHandlers between them. What we need is a way to select the right one using some abstraction (what currently is the port). Is there some work done in this direction somewhere?

re: cookies. I have a list of Response objects from the same domain, now I am trying to replicate the client state at the end, specifically the cookies. The basic logic would say to loop through each Response, and for each Cookie either add new or overwrite, as appropriate. What's the most efficient or easiest way to do this in 4k? loop and create a simple list of k/v pairs? Use BasicCookieStorage and map the Response's cookie to LocalCookie? Use a Filter and send each Response through it? Something else? Thank you.

Hi we are trying to upgrade http4k but we are getting a compile error because body.gzipped() now returns a CompressionResult. Any ideas?

I am evaluating kotlin frameworks for my new app which will use server generated pages, no JSON api needed. I like simple frameworks with little magic, but with reasonable defaults, speed and large enough community. That left ktor and http4k in kotlin world. Why would I choose http4k over ktor?

1 more question. Is there a way to add auto reload functionality on code changes?

Hi, what's the best practice for returning an arbitrary Map object as a JSON Response? No validation, as the keys will vary often. The 3 examples at https://www.http4k.org/guide/modules/json/ all describe objects specifically created to be JSON, not a normal Map (or list of Pairs). And can http4k automatically set the Response's content type to

application/json

? Perhaps an equivalent of Flask's

jsonify

(https://flask.palletsprojects.com/en/1.1.x/api/#flask.json.jsonify). Thanks.

I noticed that the latest http4k uses okhttp

4.6.0

but the newest version of okhttp is

4.7.0

Is there a recommended upgrade strategy here? Should I wait for http to catch up with okhttp before upgrading both?

Hi, I’m trying to contribute to http4k and think I may work on https://github.com/http4k/http4k/issues/327 To add the multipart response support, should I create a set of classes and lenses similar to

MultipartFormBody

,

MultipartEntity

,

MultipartFormParser

,

Part

etc.? If so, is it possible to reuse some of the existing logic? Because the current

http4k-multipart

module seems very specific to

multipart/form-data

requests, it feels not very straight-forward to reuse.

For anyone that is interested - another pretty good showing from the http4k camp... 🙂 https://kotlinlang.slack.com/archives/C0B8RC352/p1590765239291500

So, I'm using Http4k streaming like so

val client = ApacheClient(responseBodyMode = BodyMode.Stream, client = HttpClients.custom()
		.setDefaultRequestConfig(RequestConfig.custom()
				.setCookieSpec(CookieSpecs.IGNORE_COOKIES)
				.build()).build())

val app = { request: Request ->
	val query = Request(Method.GET, "<some url>")
	val response = client(query)

	Response(Status.OK).body(response.body)
}.asServer(Netty(port)).start()

Now if I use Jetty, the streaming nature works fine. I want to use Netty however, and switching to Netty means all the streaming code is ignored, and no waterfall occurs.

Also, is

ApacheClient

safe to reuse in a handler?

Hi guys, we're currently trying to use http4k as a reverse proxy, and wanted to pass an incoming request to a client (which client depends on matching the path in the request), and then return the response from the client to the originating requestor. We're having some trouble with tests at the moment - we wanted to create a fake server in our test (to simulate the service we proxy to), and capture the request that it receives, so assert that our proxy passed on the request correctly. The issue that we're having is when trying to call bodyString() on the captured request, this just hangs. We think it's something to do with the body already being consumed, but wondered if you could help explain what we're doing wrong here? I'll post the example test and HttpHandler code. Thanks in advance!

So a bug I've found is that

ApacheClient

will just stop querying large files (3Mb) and not close the connection. This leads to thread starvation and eventually an unresponsive app.

val client = ApacheClient(responseBodyMode = BodyMode.Stream, client = HttpClients.custom()
    .setDefaultRequestConfig(RequestConfig.custom()
        .setCookieSpec(CookieSpecs.IGNORE_COOKIES)
        .setConnectTimeout(3000)
        .setSocketTimeout(3000)
        .build())
    .setMaxConnTotal(10)
    .build())

I'm just piping the resulting stream directly into a response, and when I augmented the ReadCalls with some printlns, they just suddenly stop after a while - and then my app freezes. Edit: It can also happen on smaller files. What's important is that the connection doesn't appear to be closed.

Hi All, How can I easily configure OpenAPI or swagger for my existing routes? I checked the codes and discussions here, open API contract is totally confusing me to be honest🙂

fun routes(): RoutingHttpHandler {
return org.http4k.routing.routes(
                "/ping" bind Method.GET to pingHandler,
                "foo" bind <http://Method.POST|Method.POST> t fooHandler,
              
        )
}

Our @kotliners talk "Writing Test-Driven Apps with http4k" is now available. Create reliable, crazy fast HTTP tests (even for 3rd party services), which you can reuse at multiple levels of the testing pyramid. https://t.co/xrrkdkUHmb

How does WsHandler work? Does it handle the upgrading itself? If not, why does it take an Upgrade Request instance field?

GET /api/personer/47120999865 HTTP/2

Host: localhost:8443

User-Agent: curl/7.64.1

Accept: /

* Connection state changed (MAX_CONCURRENT_STREAMS == 128)! * TLSv1.2 (IN), TLS alert, close notify (256): * Empty reply from server * Connection #0 to host localhost left intact curl: (52) Empty reply from server * Closing connection 0

Hi being using HTTP4k in production for roughly a year now and its been great! So thank you. I'm having a very odd and very rare issue. I recently updated from

3.183.0

to

3.249.0

and I use Undertow in production About once a day, a single request throw this error

io.undertow.request - UT005007: Request was not fully consumed

Any ideas?

Hi David, adding cookies to a request via

.cookie(name, val)

results in the cookie values being surrounded by double-quotes. I'm guessing that is usually OK but is it possible to create the Cookie header without the double-quotes for some fussy servers? (other than creating my own list of k-v pairs and joining the string manually). Thanks

Hi, does anyone know of an example app using http4k and oauth2 where the app uses the user's oauth token not only to identify/authorize the user but also to make requests to remote web services?

Getting this error: “header ‘x-http4k-context’ is required” when calling

contexts[request]

Any ideas?

not really a 4k question but probable you've had to deal with it: Trying to test my 4k server using the 4k

ApacheClient()

... which is stuck on "DEBUG" log level and thus prints huge amounts of output. Tried to change with

(LoggerFactory.getLogger(ApacheClient::class.java) as ch.qos.logback.classic.Logger).level = Level.ERROR

but no luck. Any ideas on changing the client log level? Thanks.