Has anyone dealt with an issue like this before?

* What went wrong:
Execution failed for task ':presentation:minifyBrandProductionReleaseWithR8'.
> Could not resolve all files for configuration ':presentation:brandProductionReleaseRuntimeClasspath'.
   > Failed to transform ktor-client-core-jvm-1.6.2.jar (io.ktor:ktor-client-core-jvm:1.6.2) to match attributes {artifactType=android-asm-instrumented-jars, asm-transformed-variant=brandProductionRelease, org.gradle.libraryelements=jar, org.gradle.status=release, org.gradle.usage=java-runtime, org.jetbrains.kotlin.platform.type=jvm}.
      > Execution failed for AsmClassesTransform: /root/.gradle/caches/transforms-3/0442ceba8861991962529ab9a6c53c81/transformed/jetified-ktor-client-core-jvm-1.6.2.jar.
         > Index -1 out of bounds for length 0

h3{+"a < b"}

it display as it is rather then less then sign. how html entities can be displayed?

Does someone use something other than Exposed to communicate with a database?

I'm using ktor, but think this might be a Gradle/IntelliJ question. I have

kotlin("plugin.serialization") version "1.5.20"

declared in my

build.gradle.kts

file, and yet I cannot use the

*import* kotlinx.serialization.Serializable

in my code. The "External Libraries" part of the project explorer does not show

Gradle:io.ktor:ktor-serialization:1.6.1

like the example code in https://ktor.io/docs/creating-http-apis.html does when I run that. I'm not sure what I need to do in order to get IntelliJ/Gradle to install the necessary dependencies so I can use them in the code?

When adding authentication to a website, do you wrap all the routes which the user must be logged into to with

authenticate()

or do you just add

authenticate()

to the routes which actually do the authentication? I'm terribly confused.

Hi In the app engine deployment documentation there is an error in the configuration of the artifact (point 3) : https://ktor.io/docs/google-app-engine.html#configure-app-engine-settings

appengine {
    stage {
        artifact = "build/libs/$project.name-$project.version-all.jar"
    }

So missing some curly braces:

appengine {
    stage {
        artifact = "build/libs/${project.name}-${project.version}-all.jar"
    }

I am trying to change from

0.0.0.0

to

0.0.0.0/project_name

but while running I'm getting

java.nio.channels.UnresolvedAddressException

What's the correct way to change host URL?

Hello. What's the go to for database (specifically postgresql) connectivity in the community? I've eyeballed Exposed, but at this stage I want some far lighter weight - ideally just parameterised SQL queries, not an ORM. I also don't really want to duplicate my SQL Schema in classes, ideally. SQLDelight looks fairly promising, but the PostgreSQL support is still in development, and again it seems to solve a problem I don't have. I don't have a Java background, so perhaps there is a really basic answer I'm missing because I keep including "Kotlin" in my Google. My goal would be something like https://knexjs.org/ for Kotlin. A basic query builder that will also let me execute raw SQL with parameterised input.

When using Json I see the JsonFeature removing the content-type ([here](https://github.com/ktorio/ktor/blob/main/ktor-client/ktor-client-features/ktor-cli[…]ent-json/common/src/io/ktor/client/features/json/JsonFeature.kt)), do I need to add it anywhere else? I have it in the defaultRequest but the jsonFeature is being installed after the default so it is never present

I’m using kotlinx.serialization, and when I receive a JSON object that has some unknown keys to my model a 500 is sent back automatically. I don’t want to use

ignoreUnknownKeys = true

. And I am using the

post("path") { myType: MyType -> //code }

syntax. I could potentially change this with

val login: Login = try {
    call.receive()
} catch (e: SerializationException) {
    return@post call.respondWith(Response.badRequest(InvalidInput))
}

Or even

val login: Login = call.receiveOrNull() ?: return@post call.respondWith(Response.badRequest(InvalidInput))

But I don’t necessarily like this if there is an alternative. How would I deal with this? Can I create an interceptor that catches all SerializationExceptions? Something else? Is my proposed solution the only way? I really do want to use the typed version of the post() method if possible.

This message was deleted.

Hi All, I'm trying to run a Ktor server on android but cannot get the static webpage to display on the browser. I've added an assets folder and place the website as a subfolder in it, The request is recognized but the path I give in the response always seems to be wrong. Any ideas what I'm doing wrong?

I've just got this confusing piece of stack trace when debugging a problem with ktor:

io.ktor.features.CORS.respondCorsFailed(CORS.kt:604)

It points to line 604 where CORS.kt has only 537 lines... I know it seems to be not really related to ktor, but probably Kotlin in general, but has anyone faced something similar or understands why it happens? If not, I'm going to report it as a Kotlin bug.

I have created a Ktor feature to retry network call in case of Unauthorized error with an updated access token. In receive pipeline, I am intercepting the before phase to change the response in case of the error. I have validated that the retried call with the new access token is being success, however the status code that I am receiving in the client side is still Unauthorized. The feature implementation looks like below:

private fun handle(config: Config, scope: HttpClient) {
    scope.receivePipeline.intercept(HttpReceivePipeline.Before) { response ->
        if (context.response.status == HttpStatusCode.Unauthorized) {
            val client = HttpClient(scope.engine)
            var newResponse: HttpResponse = context.response
            runCatching {
                val accessToken = config.tokenRefreshService?.getAccessToken()
                val requestBuilder = request {
                    url(context.request.url)
                    headers {
                        for (header in context.request.headers.names()) {
                            if (header != AUTH_TOKEN) {
                                append(header, context.request.headers[header] ?: "")
                            } else {
                                append(header, NetworkModule.authToken(accessToken ?: ""))
                            }
                        }
                    }
                    method = context.request.method
                    body = context.request.content
                }
                client.request(requestBuilder) as HttpResponse
            }.onSuccess {
                newResponse = it
            }.onFailure {
                newResponse = response
            }
            client.close()
            if (newResponse == context.response) {
                proceed()
            } else {
                proceedWith(newResponse)
            }
        }
    }
}

Please can someone help with this? I was expecting that by updating the subject in

proceedWith

it will work.

How can I secure store strings like passwords in a ktor app?

On GitHub I've found interesting ktor projects, but none that demonstrates well how do unit and integration testing. Are you aware of something like that?

Hi there, I am trying to get Ktor client to trigger a token refresh when getting a 401. Unfortunately the api is not setting the correct auth scheme in the response header. They are using “default” when the BearerAuthProvider expects “bearer” obviously. This prevents the token refresh logic from being run. Any ideas on a not so hacky way around this?

Hi 🙂 I have three modules (main, core, synchronization), and I need to DB access in core and synchronization. Should I init a connection to DB in the main module or core and synchronization modules?

what happened to

ktor.locations

? why does get<Object> work, but not post<Object> not work?

I have a problem with Koin - I get the DuplicateApplicationFeatureException. I have 3 modules with installed Koin plugin/feature.

Hi 👋 does someone has a best practice for sharing code between ktor server and multiplatform client?

I wanted to make a little server to share files, but I get an error when I try to go to the server.

routing {
     static("/static") {
          staticBasePackage = "/home/pi/Raspy/"
          files("public")
     }
}

2021-08-20 22:15:54.514 [eventLoopGroupProxy-4-2] TRACE ktor.application - Failed to decode request
java.lang.IllegalArgumentException: invalid version format: XV�PÒ�ÆICL;ÅËÊ)|$À+À/̨̩À,À0À

URL I try: https://localhost:26666/static/public/test.txt

Has anyone worked with rsocket + ktor in android? If so kindly point me to any references

I am getting “io.ktor.utils.io.charsets.MalformedInputException: Input length = 1” from client when api returns 400 and “{}” instead of a responseException. New to ktor so I might be configuring the client incorrectly

I'm new to Ktor and having a problem with receiving a post - I'm sending a really simple bit of JSON

{"title":"AA","slug":"BB"}

and I've got an equally simple Serialiable

data class TestForm(val title: String, val slug: String)

. Posting the JSON from my web page gets a 415 Unsupported Media Type error. What am I likely to have got wrong in setting up ContentNegotiation?

I would need some

ktor-io

help. I encounter some difficulties because

ReadByteChannel

and

ByteReadPacket

don't share a common super-interface for all the

read***

operations. I have to read a possibly large amount X of bytes (up to 2^63-1) from a

ReadByteChannel

. The precise number X of bytes is read first then I wish to delegate the read of the content of those X bytes to a sub-method which have to read (in this amount of bytes) an unknown number of packets of different sizes. My problem is that

readPacket(size: Int)

takes an

Int

and not a

Long

(and also that may be crazy to load a possibly very large number of bytes in memory). Ideally, I would like to create as "sub-channel" with a limit (of X bytes). Any hint on how I should proceed ? (Please tell me if I am not clear enough.)

This message was deleted.

Within the docs we have

get("/user/{login}") {
    if (call.parameters["login"] == "admin") {
        // ...
    }
}

But from looking at the definition

call

just seems an alias for

context

- what is the reason for the convention that has us using

call

over

context

in this situation? (Kotlin noob, so feel free just to point me at the docs and RTFM me)

[Solved] 🙂 I have a strange problem. I get:

Response has already been sent
io.ktor.server.engine.BaseApplicationResponse$ResponseAlreadySentException: Response has already been sent

but only in tests and only in the situation when I call

every { something, something } throws AnyException

Did you have similar problem?