How are you abstracting Ktor’s

HttpClient

? I would like to hide it behind interface for testing and maintainability purposes, but I can’t because its methods are defined as a

inline reified

Hi all! Are there issues with the

HttpResponseValidator

on Javascript? Somehow, if I have this:

HttpResponseValidator {
    validateResponse {
        check(it.status == HttpStatusCode.OK || it.status == HttpStatusCode.NoContent)
    }
    handleResponseException {
        println("Response exception")
    }
}

The handleResponseException is not called, until the coroutine it is launched in cancels. Also subsequent requests are hanging

Hi all, that is recommended method to generate ktor client from OpenAPI v3 specs nowadays? Ktor support in openapi-generator seems to be outdated, it uses kotlin 1.3.50/ktor 1.2.4/serialization 0.12.0.

Hi! Question about ktor and multiplatform. I see OAuth2 support is provided by the code in

ktor-features/ktor-auth

. However, all of the source is under

jvm/

. Is there a particular dependency on JVM? Or is there some other reason this cannot be common code and reused on a native platform?

Hey all. I googled and dug through docs and I am still a bit confused about this. I am trying to make an interceptor that will check if an authorized principal has rights to access a route based on roles. This is my interceptor, which I based on the one in the docs:

fun Route.authorizedBy(roles: List<String>, callback: Route.() -> Route): Route {
    val routeWithRoles = this.createChild(object : RouteSelector(RouteSelectorEvaluation.qualityConstant) {
        override fun toString(): String {
            return "(roles: $roles)"
        }

        override fun evaluate(context: RoutingResolveContext, segmentIndex: Int): RouteSelectorEvaluation =
            RouteSelectorEvaluation.Constant
    })

    routeWithRoles.intercept(ApplicationCallPipeline.Call) {
        if (!hasAccess(roles, call.user)) {
            call.respond(HttpStatusCode.Unauthorized, "Not sufficient authority") //todo I am not sure if I should respond or throw errror
            finish() //todo i am not sure if I should call finish here
        }
    }

    callback(routeWithRoles)
    return routeWithRoles
}

1. In my code I am uncertain if I should throw an exception from the interceptor or is it ok to call the

respond

method? 2. Also is it necessary to call the

finish()

there? 3. Should I call

proceed()

in the

else

branch or is that not necessary? In general I think it is unclear when to use the proceed and finish methods and what is an intended way to break out of an interceptor with errors.

In case folks are interested about some design discussion we’re having regarding Ktor features https://youtrack.jetbrains.com/issue/KTOR-1142

hi, is it possible to add headers to request in servers Pipeline::intercept?

Hi all. Using ktor-jwt how can i get the payload?

Hi. I am using Retrofit in an Android project, and want to migrate some parts to Ktor Client as a PoC. I am having trouble to find a way of getting the wrapped return value as Retrofit does. e.g.

suspend fun get() :Response<DataValue>

in Retrofit would give me a response code, a way to parse an error model returned, etc easily. How can I have this in Ktor? Haven't seen it in the examples, unless using the

HttpResponseValidator

function to the Client configuration, which I will have to configure per api call. I am pretty sure there is an easier way, but could someone point me to a good example please?

Hi all, I try to implement an async request to a ktor-Server which shall respond directly and then start the async task. It is possible to do it like:

put<MyRoute> {
        call.respond(HttpStatusCode.OK)
        MyService.runTask()
    }

This returns the response directly and the synchronous task seems to run until the end. Does every call already run in a separated thread or do I have to start a new thread for the runTask()?

When can we expect the next update? That Apache client engine bug keeps freezing my entire program every night 😕

Hi guys, Is there a way to rerun the request when intercepting the response pipeline? I'm trying to implement a Refresh Token Feature but I can't figure a way to rerun the request with the new token.

Hey, is it common practice to pass around a coroutine context? Specifically, should I pass around the

application

variable? I come from the C# world, and I’m trying to figure out how to actually call suspend functions

Hi. Working on a custom Ktor feature to extend http cache-control to store on a permanent storage. Following default Ktor cache feature

HttpCache

implementation. Faced with some challenges and some obstacles which I cannot overcome: 1.

HttpResponse

and

HttpRequest

have few sub-classes but only

DefaultHttpResponse

and

DefaultHttpRequest

are public but they are annotated as

@InternalAPI

. I could use them to deserialize stored data but then it put the project at risk. However, this is not the main issue. 2. Even though, technically

DefaultHttpResponse

and

DefaultHttpRequest

are usable but they requires

HttpClientCall

instance. 3.

HttpClientCall

constructor is internal. Function with the same name

HttpClientCall

is internal also. So technically cannot create the object instance. Briefly,

HttpClientCall

is main obstacle of implementing permanent cache storage. Does anybody have any idea how to overcome this?

Hey all! Does anyone know where ktor.io/docs is maintained so that suggestions/PRs/etc. could be made? Is an issue report preferred?

Where has this dependency gone? Intellij says it's not found.

implementation("io.ktor:ktor-server-serialization:1.4.1")

I'm still confused about setting up kotlinx #serialization with ktor 😩

Hello everyone, I am curious to find out if I can get ktor client micrometer metrics. The ktor server has the

MicrometerMetrics

feature but I don’t see an equivalent one for the ktor client. Am I missing something?

Hello everyone, I have a question about extracting routes. So I extracted them and put them in separate files, but the question is, if these different routing all need to hold the references to same objects, where to put those objects? More specifically, I have two routing files called Order.kt and Item.kt, and both of them need to use an instance of ItemService class. Then where should I put this

lateinit var itemService: ItemService

For now this is what I do, in Order.kt file:

lateinit var itemService: ItemService
fun Route.order() {
  post<Order> {
    init(...)
  }

  get<Order> {
    init(...)
  }
}

init(...) {
  itemService = ItemService(...)
}

and in Item.kt file

fun Route.item() {
  post<Item> {
    init(...)
  }
  get<Item> {
    init(...)
  }
}

Basically I put those common objects and their initialization method in one of the routing files, and other routing file can have direct access to those objects and methods. I wonder what is the more proper way of organizing this? Appreciate any kinds of input !

I am still getting crashes from Ktor on iOS...

I am using Ktor to build api backend for mobile project I can not find any support from Ktor for caching Redis Do you know any suggestion ?

Hi, i need different caching strategies for different parts of my API. I tried to split the app into two modules and install

CachingHeaders

in both, just with different configuration. This fails with

io.ktor.application.DuplicateApplicationFeatureException: Conflicting application feature is already installed with the same key

Is this possible at all?

Is there way to dynamically enable/disable particular routes? Or for example does web server have to be restarted to allow this?

Are there guides that show you how to implement custom authentication? This is all I got from the official documentation which is quite lacking

Maybe a very easy question, but I couldn't find it: I want to create a test in Ktor-client that simulates that the httpClient does not have an connection. How can I do that?

is it possible to update the routing on the

Applicaiton

after the server is stated?

I would like to set this on a per-request basis

Does anybody know how to hot reload and refresh the browser window after a change with ktor like the web pack dev server does?

Hi! Is there a way to log the exact request a Ktor client is sending? Not just the headers, but also the full body contents

I'm trying to use Ktor under Kotlin Native but it looks like the ktor-client-core-native package doesn't exist with the 1.4 line