@Jonas Bark absolutely, I was just hoping to get general feedback here before doing so to make sure I hadn't missed anything obvious when going through the docs.

should the best course of action in this scenario to use java libraries like this: https://bitbucket.org/b_c/jose4j/wiki/Home or this: https://github.com/jwtk/jjwt?

Any chance someone could look at the issue I created two days ago? https://github.com/ktorio/ktor/issues/917, maybe someone knows how could I consume Flowable to return its result as a json to the client

Why is the httpClient.request changing response/return type depending on if i use Features or not? Trying to wrap a promise like solution to the httpClient.request response but for whatever reason it will change between HttpResponse and io.ktor.client.features.observer.DelegatedResponse if I use logging. This is while using KotlinxSerializer too, so it does not even seem to map it to json

Just got this error during the build, of an Android multi-module project:

More than one file was found with OS independent path 'META-INF/ktor-http.kotlin_module'

HttpClient shows up in red in IntelliJ even when there is no errors (compile works, alt+click works on it as well), is that a known bug?

I am trying to add cookies and now get

java.lang.IllegalArgumentException: Couldn't instantiate type class Session for parameters [value]

whenever I call an endpoint.

I have the following code, which is a part of a MPP library which I now use from iOS. The problem is that sometimes the size of

input

gets less than intended, in other words I don’t get the data in its entirety. Via Wireshark I’ve verified that the problem is not on the backend side, I always receive the same amount of bytes via the network interface and the bytes are also the same. But in 1-10% of cases

input

is shorter than intended.

private val client = HttpClient()

suspend fun <T> send(...): ... {

        val response: HttpResponse

        try {
            response = <http://client.post|client.post>(url) { body = payload }
        } catch (e: Throwable) {
            ...
        }

        if (response.status != HttpStatusCode.OK) {
            return ...
        }

        val input = response.readBytes().asUByteArray()
        ...
}

Thoughts?

Is there any way to get a more helpful error message from the Ktor Client (using Gson as the JSON serializer)? End up with this confusing error: Fail to run receive pipeline 😕

Hello everyone, I have a problem while using Jackson ContentNegotiation inside Ktor. I keep getting

InvalidDefinitionException - (no Creators, like default construct, exist): cannot deserialize from Object value (no delegate- or property-based Creator)

I'm installing the feature as follows:

install(ContentNegotiation) {
            jackson {

                // Set how the dates should be handled
                dateFormat = SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'").apply {
                    timeZone = TimeZone.getTimeZone("UTC")
                }

                // Do not serialize null values
                setSerializationInclusion(JsonInclude.Include.NON_NULL)

                // Do not worry about unknown properties, ignoring them
                configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false)

                // If we receive an empty object, treat it as null
                enable(DeserializationFeature.ACCEPT_EMPTY_STRING_AS_NULL_OBJECT)

                //accept also lowercase value in enum fields
                enable(MapperFeature.ACCEPT_CASE_INSENSITIVE_ENUMS)
            }
        }

Every time I do something like

call.receive<MyClass>()

I get that error. How could I resolve the issue?

hey guys, I'm just starting to learn Kotlin for a new job I start in a couple weeks. Would you recommend learning ktor along with it, or should I focus on the language fundamentals first and start with integrating something like Spring Boot, Micronaut, or some other solution for building REST APIs?

Hi everyone! Maybe someone encountered the same challenge...

lateinit var foo: Foo

fun Application.main() {
  if(!::foo.isInitialized){
    // Initialize foo, which is heavy processing...
  }
  // More code...
}

Is there any way I can avoid re-initializing foo with Autoreload? I hoped the initialization check would work, but it won't.

Is there a Android example that uses the Ktor HTTP client for JSON serialization/deserialization with a REST API?

Why does the route not return until what is running inside the launch is done? I thought that

launch

returned immediatly and ran whatever was inside on a new thread.

launch {
    doStuff()
}
call.respond(Created)

How do one conditionally apply authentication in ktor? 😛 I want to skip it in development since I do not send

basic

auth headers then

For routing, why did Ktor go with

"/mouse/{id}"

rather than

"/mouse/:id"

, which seems a little more common?

oh great another one then? 🙂

Yep, when you post something to the test application engine, you now need to specify the content type

I'm using the Ktor CIO client to call an external service. If the service takes over a certain threshold to respond I want it to fail. Is there any way to do this in the client? I'm currently wrapping the client call with

withTimeout

, but will this handle cleanup properly, will it cancel the in-flight request? (I'm aware of, and using,

connectTimeout

, but I want to timeout on the request as a whole, not just opening a connection.)

Is there a way in Ktor to have multiple routes go to the same handler. For example I’d like “/api/todos” and /api/v1/todos” to be the same branch of the tree?

I know there’s https://ktor.io/servers/uploads, but I just don’t know where to upload them and keep a reference in my DB

Hi, anyone has problems with the Ktor Http Client for Kotlin/Native? When instantiating a

HttpClient

compiled against iOS it crashes because the

Charset.ISO_8859_1

is not found. Kotlin 1.3.21, Ktor Client 1.1.2

Probably the IAE at 61 here https://github.com/Kotlin/kotlinx-io/blob/master/native/src/kotlinx/io/charsets/CharsetNative.kt#L61

Can I somehow accept body in

DELETE

route method? Right now it returns 415.

When I use ktor http client I want to read a message that comes with an unsuccessful response status, like 500, but when I call

response.receive<String>()

it throws with BadResponseStatusException. I kinda understand the reason for that, but how do I read a message that comes with bad response?

Does putting a runBlocking in a ktor route block the web server from receiving more requests?

runBlocking {
            delay(500)
    }

How do I write a file upload request + json body in Ktor client common (mpp) ?

When uploading an base64 encoded image with ktor-core (common sourceset) when the image is bigger than around 200k I get the following error:

IllegalArgumentException {message_8yp7un$_0: "should should be greater than write space + end ga… = 9, writeRemaining = 0, endGap = 8, rem+gap = 8", cause_th0jdv$_0: null, name: "IllegalArgumentException", stack: "IllegalArgumentException: should should be greater…8td$_0 (<http://localhost:9000/bundle.js:31435:19>)"}

Hello, World! I have a pattern that happens a lot in our codebase: enums with a String key, and we need to get the enum value from the key, or a special “unknown” value. So what we do currently is something like:

enum class MyEnum(val key: String) {
    FOO("foo"),
    BAR("bar"),
    UNKNOWN("unknown");

    companion object {
        fun getByKey(key: String?): MyEnum {
            return MyEnum.values().firstOrNull { it.key == key } ?: MyEnum.UNKNOWN
        }
    }
}

I’m looking for a way to not repeat this companion object for all our enums. Possibly a combination of an interface and a generic extension function? Any idea? 🙂