hi.. any ideas on how to add rest style pagination headers like

</test_domain/v2?key=test&per_page=5&page=2>; rel="next",</test_domain/v2?key=test&per_page=5&page=5>; rel="last"

with ktor

Does anyone here know about a good way of documenting your APIs with ktor? (something like swagger codegen but it doesn't have to be swagger, anything that produces documentation would be 👍 )

guys is it possible in a custom feature in Ktor declares a dependency on another feature?

Hi, is it normal that the LogLevel.HEADERS only show the headers that are sent but not the headers I receive? (client side/android) My expectation would be the same behaviour as with okhttp, that the headers I receive will also be displayed.

please please publish ktor 1.3.2 on maven central

jcenter.bintray.com gives me HTTP 502, (it is hosted by jfrog)

When is it hoped to release a version of ktor that works with native-mt version of coroutines?

Is it possible to serialize handling of a specific route? For example, I have

user/{userId}

and want to make sure all requests for a given

userId

are handled in the order they were received. I've tried doing this in the route implement, but because there are multiple threads calling it there's still wiggle room as to the order in which they're handled: I know the network is already a variable, but I'm trying to get as close as possible to handling them in the order in which they were received. I looked at doing this in a feature, but even then the request is already dispatched to a worker thread so they've already been parallelized, is there a lower level hook? Or maybe this whole endeavor is misguided?

What is the current status on linuxArm32Hfp support for Ktor Client?

Oh, I should point out another ktor lib I wrote recently. If you have an existing JAX-RS-based app (whether it's just a plain Jersey thing, or Dropwizard, or anything else like that), you can use https://bitbucket.org/marshallpierce/jersey-container-ktor/src/master/ to host your JAX-RS resources inside ktor. This means you're only running 1 server, on 1 port, and you can migrate endpoints from JAX-RS to Ktor one at a time. This is also used in production and serving real traffic.

How can I expose data from within the Application module scope? Lets say I do the following:

fun Application.adapter() {
    val topic: SomeObject = SomeObject(environmnet.config.property("something").getString())
}

and I want to use the topic Object in a different class (a koin module). I just have the feeling that I'm missing a fundamental concept here.. I just found that github issue, but that doesn't really help me. https://github.com/ktorio/ktor/issues/1448

Something that I got bit by that I wonder if is intended: when using the

ktor-client-cio

client and creating a

WebSocket

connection, if the

HttpTimeout

feature is installed, it will apply to the

WebSocket

connection, even if the connection is actively transmitting messages back and forth. It seems like

WebSocket

should be considered an exception to

HttpTimeout

? If not, is it possible to configure

HttpTimeout

in a way that it could be applied to some requests (normal ones) but not things like a websocket connection?

Any news of the macosx curl empty body issue https://github.com/ktorio/ktor/issues/1622? Is there anything I could provide to help solving the issue?

Hello for all, I try to use ktor-client in

native

in .kts file

dependencies {
                implementation("io.ktor:ktor-client-core:$ktorVersion")
                implementation("io.ktor:ktor-client-core-macosx64:$ktorVersion")
                implementation("io.ktor:ktor-client-core-native:$ktorVersion")

                implementation("io.ktor:ktor-client-curl:$ktorVersion")

                implementation("io.ktor:ktor-http-cio:$ktorVersion")
                implementation("io.ktor:ktor-client-cio:$ktorVersion")
                implementation("io.ktor:ktor-http-cio-native:$ktorVersion")
                implementation("io.ktor:ktor-http-cio-macosx64:$ktorVersion")
            }

It works with CUrl:

client = HttpClient(io.ktor.client.engine.curl.Curl)

But doesn’t works with CIO:

client = HttpClient(io.ktor.client.engine.cio.CIO)

> Task :compileKotlinMac FAILED
e: /.../CurlClient.kt: (12, 51): Unresolved reference: cio

What have I to do?

Anyone else noticed that ktor HttpClient on android freezes (and later times out) if you try to send a body a long with a GET request?

Hi, I'm very exited with KTor and I'm using it for several microservices. I created a Feature to integrate prometheus metrics on the http server. It was very easy. Then I created a Feature for the client side, but I got a little confused with the client pipelines and which is the best place to add the interceptor for measure total request time. I want to add to the measure the returned status code from the http response. Any help to understand pipelines and the proper place to inject metrics will be welcome. (edited)

Hi. I wrote an Interceptor to obtain the userId and session Id to be pushed into a ContextElement to be able to get those value in other parts of the app without the need to pass them as parameters all through the business logic. The path is like "/api/users/{userId}/rest-of-path" and the code is similar to this:

pipeline.intercept(ApplicationCallPipeline.Features) {
                call.parameters["userId"] --> null
                proceed()
            }

The problem is that

call.parameters["userId"]

is always null. I guess I'm doing something wrong. Any help?

Hi, I am using ktor server ContentNegotiation features setup like this

install(ContentNegotiation) {
        json()
    }

on the client side, I use kotlinx-serialization to serialize a sealed class and post it to server but it doesn't work because the kotlinx-serialization produces different format than ktor-server expects. I thought they are supposed to use the same format. What is the way to make them work together?

I was wondering how a proposal for a different approach on the routing configuration would be accepted. Something in the direction of middlewares (similar to expressjs)?! Also something that would return a response object instead of calling a method on a "call" import.

Is it just me or Ktor has very slow startup times? I have a Ktor backend hosted in GCP and uses Cloud SQL (postgres). When the backend has been idle for some time, it requires a new startup which takes almost 1 minute. This breaks the user experience. Why does the app have to start all over again, shoulldn't this happen only once during deployment? I checked and saw that part of the initialization that slows the startup is database work (flyway). Is there a way to speed this up or achieve it asynchronously?

Hey all, so I am attempting to make a POST request in a unit test using ktor on iOS (native) and I get this certificate error.

io.ktor.client.engine.ios.IosHttpRequestException: Exception in http request: Error Domain=NSURLErrorDomain Code=-1202 "The certificate for this server is invalid..."

Any ideas on how to solve this? (this request works on every other device I've tried.)

how come when I do a OPTIONS request to get whether CORS is enabled or not in the preflight request, it responds with a 403? currently, I have

install(CORS) {
		method(<http://HttpMethod.Post|HttpMethod.Post>)
		allowCredentials = true
		anyHost()
	}

Is there a way to split/buffer a ByteReadChannel? My use case is downloading a file from a http URL on GET request and then streaming it to the client as as well as a local file.

the ktor Url class seems to accept bogus url strings when you construct with

Url("bogus")

(it turns that into http://localhost/bogus)….anybody know of a good kmp way to validate a Url?

I was working on migrating to Ktor and in our microservices I need to call external rest webservice to validate my Jwt token. Any idea about how to achieve this with Ktor??

I can put it in a pastebin or something for you to look at.

Hello How I can call ktor-client/curl (1.3.2) post in kotlin-native (1.3.72) with coroutine(1.3.6)? This can produce an error https://github.com/ktorio/ktor/issues/1538

val result = runBlocking {
    <http://client.post|client.post><String>(url) {
        contentType(ContentType.Application.Json)
        body = json
    }
}

Hey folks 👋 I’m facing some issues with sending multipart data using Ktor for a multiplatform project. Basically I’m converting the image to

ByteArray

and then passing it in the multipart block but server is not accepting it as a multipart request but sees it like a regular post call (and the API is working fine on postman),

val data: ByteArray = ...
val urlString: String = ...
httpClient.request<T>(urlString) {
    method = <http://HttpMethod.Post|HttpMethod.Post>
	body = MultiPartFormDataContent(
    	formData {
        	append("avatar", data)
    	}
	)
}

Can someone point me to right direction what could be wrong/missing here? Is there some other way to upload an image? Do we have to manually set

"Content-Type"

as

multipart/form-data

somewhere? 🤔

So the ktor website in its guide for websockets gives the following example:

install(WebSockets) {
    pingPeriod = Duration.ofSeconds(60) // Disabled (null) by default
    timeout = Duration.ofSeconds(15)
    maxFrameSize = Long.MAX_VALUE // Disabled (max value). The connection will be closed if surpassed this length. 
    masking = false
}

However, this doesn't actually work (as far as I can tell), because the receiver of the lambda is the type of the first parameter of

WebSockets

, which is

Unit

. Anyone know where I went wrong?