Is there a reason why

io.ktor.http.URL

isn’t

@Serializable

? Seems like a good way to avoid and a quick win to get basic validation:

@Serializable
data class Person(
    val name: String,
    val friends: String,
)
val p = Person("Abbey", "<http://ex.com/abbey/friends>")
Json.encodeToString(p) // { "name": "Abbey", "friends": "<http://ex.com/abbey/friends>" }

val err = """
	{ "name": "Abbey", "friends": "abbey/friends" }
"""
Json.decodeFromString<Person>(err) // MalformedUrlException : SerializationException

I’m having configuration issue with

application.conf

, I declared the following :

ktor {
    deployment {
        port = 8080
        port = ${?PORT}
    }
    application {
        modules = [ ... ]
    }
    jwt {
        secret = "secret"
        issuer = "<http://0.0.0.0:8080/>"
        audience = "<http://0.0.0.0:8080/login>"
        realm = "Access to 'login'"
    }
    pbkdf2 {
        salt = "salt"
        iterations = "10000"
        keyLength = "512"
    }
}

when I use

environment.config.property("jwt.secret").getString()

from

Application.kt

I receive this error

Caused by: io.ktor.config.ApplicationConfigurationException: Property jwt.secret not found.

What am I doing wrong here?

I am sending a get request with username and password for basic authentication in the url, unfortunately the password contains $ sign, how do I disable the url encoding? I cannot send the a password with a $ as it turns into %24, pls help.

Hi Is there a way to override an install Plugin (formerly known as Features 🙂 ) in the tests ? More specifically I would like to override Koin installation Thanks

Hi I d like to add ssl certificates to ktor client. Is it possible add them to default engine or should i use okhttps. Does ktor load ssl from system ? Thx

Hi, I would like to receive

List<Stirng>

in a

GET

request what's the most efficient way to do so? I'm currently doing like this but was hoping if I can receive List<String> without any manual operation

val keywords = call.request.queryParameters["keywords"]?.split(',') // List<String>?

GET

url will be like

?keywords=a,b,c

Hi. Is there a way to measure the transferred size of a static file at the end of the request? For example, we have a 2GB static file. A user requests to get the file but cancels it when it's 25% completed. How to get the size which is 512MB?

👋 I’m using the Auth client plugin with Bearer provider, is there a way to prevent ktor for making multiple refresh token requests at once? For context, if my app makes 2 concurrent requests and they both fail due to expired access token, ktor at the moment makes 2 token refresh requests, one of which fails as the refresh token it used was already consumed by the first token refresh call. Ideally I’d want ktor to only ever execute one token refresh and then retry both original requests

Hi Is it possible to declare a list of Json objects in the config file and read it with the config.property? we have something like this:

key : [
{
  aKey: aValue
},
{
  bKey: bValue
}
]
....

IJ suggesting me one of those but I am not sure which one to use

Hey. Has anyone handled continuous delivery using ktor and kubernetes/docker. I really need a sample. Feel like it will save me a lot of time in the long run.

Hi all im trying to track down an issue with a long running websocket connection using ktor client, i send one message at the start and then im just receiving messages, in the past i have seen that the connection can get dropped, but i only get an error message when i try and send something, does anyone know if there is a way to check the connection periodically without writing something to the stream?

Hi fellows, i am work with ktor and netty as server, and after run a load test we discover that the aplication is losting requests, we realized that the configuration parameter the Netty is not otimized. I would ask if you guys can help me figuring out how to optimize netty settings in ktor. Thanks a lot for the help

Hello all, I am trying to use a function to create the HTML for my response in Ktor using the following:

route("{year}") {
    get {
        val year = call.parameters["year"]!!.toIntOrNull()
        if (year == null) {
            call.respondText { "Year can only be an integer" }
        } else {
            val posts = PostRepo.getByDate(year)
            call.respondHtml { respondWithPostList(posts) }
       }
    }
}

fun respondWithPostList(posts: List<PostDTO>?) {
    HtmlContent {
        head { title { +"Posts" } }
        body {
            posts?.forEach { post ->
                run {
                    div {
                        h3 {+"${post.title} (${post.id})"}
                        p {+post.author.email}
                    }
                }
            }
        }
    }
}

But it does not work. However, the following works:

route("{year}") {
    get {
        val year = call.parameters["year"]!!.toIntOrNull()
        if (year == null) {
            call.respondText { "Year can only be an integer" }
        } else {
            val posts = PostRepo.getByDate(year)
            call.respondHtml {
                head { title { +"Posts" } }
                body {
                    posts?.forEach { post ->
                       run {
                            div {
                                h3 {
                                    +"${post.title} (${post.id})"
                                }
                                p {
                                    +post.author.email
                                }
                            }
                        }
                    }
                }
            }
        }
    }
}

Does anyone know what I do wrong? what is the correct way to produce HTML in a function?

HtmlContent {
        head { title { +"Posts" } }
}

Here you are effectively calling the constructor of HtmlContent and adding content to it, but you are not returning the constructed instance. Your function

respondWithPostList

has no return type, so it will implicitly return

Unit

. I think the most neat solution is to make your

respondWithPostList

function an extension method of

HtmlContent

. So it would look like this:

fun HtmlContent.respondWithPostList(posts: List<PostDTO>?) {
        head { title { +"Posts" } }
        body {
            posts?.forEach { post ->
                run {
                    div {
                        h3 {+"${post.title} (${post.id})"}
                        p {+post.author.email}
                    }
                }
            }
        }
}

Hello everyone, I want to start ktor project with Intellij Idea CE. I need to install ktor plugin inside IDE but marketplace only shows "obsolete" plugin. I downloaded latest version from website and try to "Install Plugin from Disk" option but it gives this error. I researched and found new ktor plugin is only support Intellij Idea "Ultimate" version and it disappointed me. I can't afford to buy Ultimate version. Should I use ktor only if I have Ultimate version, right?

Hello everyone. I'm a total Kotlin, and Java, noob so if my question is embarrassing, I'm sorry. But... I started a new Ktor project and included routing and compression plugins. I wanted to be able to serialize my models for output in my routes, so following the pattern in https://ktor.io/docs/creating-http-apis.html#dependencies I added the serialization plugin (https://plugins.gradle.org/plugin/org.jetbrains.kotlin.plugin.serialization) to the

build.gradle.kts

file. When I do that, the

./gradlew build

goes from passing, to failing with

Could not determine the dependencies of task ':distTar'.
> Could not resolve all dependencies for configuration ':runtimeClasspath'.
   > Could not create task ':compileKotlin'.
      > Could not create task of type 'KotlinCompile'.
         > Could not create an instance of type org.jetbrains.kotlin.gradle.tasks.KotlinJavaToolchainProvider.
            > Could not generate a decorated class for type KotlinJavaToolchainProvider.
               > Cannot have abstract method KotlinJavaToolchain.getJdk().

Totally flummoxed me, and my google-fu has failed me. Can anyone point me in the right direction please?

Hello all, I could not find anything on the absolute path in Ktor routing on the internet. Do you know a way one can link to a path generated form absolute top level of the app? e.g.

route("") {
    route("/{year}/{month?}/{day?}") {
        get {
            call.respondHtml{
                title { +"title" }
                body {
                    a (href = "$baseUrl/somepath") { +"link to top level" }
                }
            }
        }
    }
}

In this example, if I do

href="/somepath"

, it will go to different places if month or day is given.

What are you using to do GraphQL with ktor?

Is there any ORM for ktor?

I'm using the IntelliJ wizard for kotlin "full stack web application" -- I'm wondering if there's any way to split the kotlin/js part of the code depending on the route. Right now it seems to bundle it all into

/static/myproject.js

with no way to be more granular?

Hello! I'm trying to implement a feature that sends a HTTP 301 redirection when certain paths are requested, but nothing has matched them in the routing step (note that I'm building general-purpose redirection feature, so just putting those paths directly in the

routing {}

block is not an option). It seems that intercepting the

Fallback

pipeline would be a good solution, but it turns out that a response is already sent earlier in that pipeline by default due to this code: https://github.com/ktorio/ktor/blob/066d0c4f12debb32b3e7385ca07c4f1bd767e0a4/ktor-[…]t-common/jvm/src/io/ktor/server/engine/BaseApplicationEngine.kt, thus triggering a ResponseAlreadySentException when I try to call

call.respond(...)

in my interceptor. Is there anyway to intercept the pipeline before the default interceptors kick in, or if not, which phase should I intercept?

Hi! I'm running a server using CIO engine and I'm getting HTTP 403 when trying to call a PATCH endpoint that uploads a photo. It doesn't even enter the handler logic, just returns 403 without any details. I stumbled upon URLConnection works fine but ktor client returns 403 forbidden during a get request : KTOR-309 but it's about CIO in client engine. It works locally and I see HTTP/1.1 is used, but it doesn't work when I deploy it to AWS where HTTP/2 is used - it may be relevant, but since there's no error message, it's hard to tell. Any idea why PATCH endpoint causes such issues? My next step would be to try configure HTTP/2 as https://ktor.io/docs/advanced-http2.html, but since it works with the rest of requests, I'm not sure if I need it 🤷

I have a problem in my multiplatform project on iOS with InvalidMutabilityException while uploading a file via KTOR. I found an issue which is marked as fixed in 1.6.2, but in my case it doesn’t help. I tried to reproduce my problem based on

client_mpp

example and found that for ByteArray with size 100 problem is not happened, but for size 200 I got an exception. here is the code of modified

ApplicationApi

@SharedImmutable
internal expect val ApplicationDispatcher: CoroutineDispatcher

class ApplicationApi {

    // 100 - ok, 200 - kotlin.native.concurrent.InvalidMutabilityException: mutation attempt of frozen <object>
    private val SIZE = 200;

    private val client = HttpClient()

    private val address = Url("<https://cors-test.appspot.com/test>")

    fun about(callback: (String) -> Unit) {
        GlobalScope.launch(ApplicationDispatcher) {
            val result: String = <http://client.post|client.post> {
                url(address.toString())
                val filename = "test"
                val mimeType = "image/png"
                val filePart = formData {
                    val key = "photo"
                    val headers = Headers.build {
                        append(HttpHeaders.ContentDisposition, "filename=$filename;type=$mimeType")
                    }
                    append(key, ByteArray(SIZE), headers)
                }
                body = MultiPartFormDataContent(filePart)
            }

            callback(result)
        }
    }
}

Hi I set ktor.deployment.watch in my project with gradle multi-projects build on windows, but I got an error. I use ktor 1.6.2

Hi, I had the next scenario, some client calls a service A with header H, service A needs to call service B propagating the same header H. Is there any feature, or plug-in, or something to do this without moving around this information all over the A service? I’m using ktor client and server in each service

With the new bearer token client auth feature, our app has two kinds of oauth tokens: authenticated and unauthenticated. Each has a separate token and refresh token. The unauthenticated tokens are used for guest users. I'd like to figure out a way to replace the guest tokens after the user has authenticated with either user/pw or social token, but the current feature seems pretty limited. Does anyone know how I might accomplish this? Should I create a new client?

Hello, I would like that when parsing a body request in

call.receive<FooRequest>()

to sanitize all fields declared as String in

FooRequest

What would you suggest?

Using Ktor http client to make a request to my Nodejs backend. Tried sending a request manually and it is working, tried with my app, the body is missing. So it has to be something with my setup

val data = JSONObject()
        data.put("email", "email")
        data.put("name", "testname")
        data.put("companyName", "testcompname")

        return singleFromCoroutine {
            try {
                val response: HttpResponse =
                    <http://client.post|client.post>("${serverUrl}${apiEndpoint}/account") {
                        body = data.toString()
                        contentType(ContentType.Application.Json)
                    }

Not sure what is happening, I'll post the entire request that gets received by the server

What's _application path_? https://ktor.io/docs/serving-static-content.html#folders Root directory of my project?