kotlinlang #ktor

Hello, can’t I use status pages for api calls? This is my code, when I go to a random route, I get the error of This page isn’t working. It is same for not authenticated pages In postman, it says <Response body is empty>

1 reply · 2 participants

xxfast

05/18/2022, 3:25 AM

Hi all. Im trying to disable ssl for my ktor client. I've been following this stackoverflow post. However, my project is an multiplatform project, and i'm making use of the default engine to create my client in

commonMain

. Given that this ssl-disabling is slightly different for each engine, is there a way to do this neatly for each engine without having to `expect`/`actual` the whole engines for each platforms?

2 replies · 2 participants

Jonathan Lennox

05/18/2022, 5:45 PM

Hi all, I'm trying to build ktor on macOS, and it's not building - it's failing in compilePosixMainKotlinMetadata, it looks like it can't find the kotlinx atomicfu and coroutines. Has anyone seen that?

7 replies · 3 participants

Sean Proctor

05/18/2022, 9:18 PM

Hi, I'm migrating a Ktor server from 1.6 to 2.0. The migration guide doesn't mention anything about the new interface to AuthenticationProvider. Can anyone point me to an example that has been migrated?

:plus1: 2

5 replies · 2 participants

Amaan

05/20/2022, 1:20 AM

If I want to host different apps/apis on different subdomains, how do I do that and test it locally? I tried doing the following:

fun Application.configureRouting() {
    routing {
        host("localhost:8080") {
            home()
        }
        host("chat.localhost:8080") {
            chat()
        }
    }
}

but that doesn't seem to work when I test it on my browser.

2 replies · 2 participants

Helio

05/20/2022, 1:24 AM

Hello Ktor team 👋🏽 , I’m about to complete the migration from Ktor 1 to 2 but I noticed some weird things in which I’m not sure if this is a behaviour change that I couldn’t find in the documentation, or if these could be indeed an issue. Both of the issues found were around the Unit/Integration tests.

1 - Converting an URL to URI using
io.ktor.http.Url
throws an Exception
java.net.URISyntaxException: Illegal character in query at index

The snippet below works for
Ktor 1.6.8
, but it throws the exception for
Ktor 2.0.1

// The input parameters used for testing are:
// baseUrl = <http://bbc-pipelines-build-info.integration.test:8082>
// urlQueryParameters = build-info?workspace-id={5734a707-dc63-47a1-b63f-03e5d80efad5}

private fun buildBuildInfoUrl(baseUrl: String, urlQueryParameters: String) =
    return Url("$baseUrl/$urlQueryParameters").toURI().toString()

The response is:
<http://bbc-pipelines-build-info.integration.test:8082/build-info?workspace-id=%7B5734a707-dc63-47a1-b63f-03e5d80efad5%7D>

Exception thrown by
Ktor 2.0.1

java.net.URISyntaxException: Illegal character in query at index 78: <http://bbc-pipelines-build-info.integration.test:8082/build-info?workspace-id={5734a707-dc63-47a1-b63f-03e5d80efad5}>
	at java.base/java.net.URI$Parser.fail(URI.java:2913)
	at java.base/java.net.URI$Parser.checkChars(URI.java:3084)
	at java.base/java.net.URI$Parser.parseHierarchical(URI.java:3172)
	at java.base/java.net.URI$Parser.parse(URI.java:3114)
	at java.base/java.net.URI.<init>(URI.java:600)
	at io.ktor.http.URLUtilsJvmKt.toURI(URLUtilsJvm.kt:54)

2 - Even though I’m using the
defaultRequest
plugin with the HttpClient from my integration tests, when I set the following attributes
host/port/protocol
, during the request time the
host
is replaced from the value I gave with
localhost
.

Looking through the snippet below in which I define my HttpClient I would assume that

host

used for the request should be

bbc-pipelines-build-info.integration.test

fun buildClient(): HttpClient {
    val buildInfoUrl = URLBuilder("<http://bbc-pipelines-build-info.integration.test:8082>").build()
    return HttpClient(MockEngine) {
        install(ContentNegotiation) {
            json(Json {
                isLenient = true
                ignoreUnknownKeys = true
                useArrayPolymorphism = true
            })
        }
        defaultRequest {
            url {
                protocol = buildInfoUrl.protocol
                port = buildInfoUrl.port
                host = buildInfoUrl.host
            }
            header(HttpHeaderConstants.X_SLAUTH_EGRESS, true)
        }
        bbcPipelinesUrlHandler(buildInfoUrl)
    }
}

However, when I make the request with

url {encodedPath = "build-info"}

the request is done using the host as being

localhost

(see snippet below). When I replace the

url { encodedPath = "build-info"}

with

buildInfoHttpClient.submitForm("build-info",...)

instead of

localhost

, the request is sent to

bbc-pipelines-build-info.integration.test

host.

suspend fun getBitbucketPipelineBuildInfo(
        workspaceId: String,
    ): BitbucketBuildInfoResponseModel = retrying {
        buildInfoHttpClient.submitForm(url {encodedPath = "build-info"}, formParameters = Parameters.build {
            append(BitbucketPipelineQueryParameters.WORKSPACE_ID.field, workspaceId)
        }, encodeInQuery = true).body()
    }

Do you reckon you could provide an assistance for these 2 issues, please? Thanks heaps!

12 replies · 3 participants

Slackbot

05/20/2022, 1:55 PM

This message was deleted.

1 reply · 2 participants

hafiedh

05/20/2022, 3:16 PM

is there any resource how to upload ktor to heroku with mongodb database?

1 reply · 2 participants

jmfayard

05/21/2022, 9:11 AM

Hello friends, how do validate that a given field is not blank / has given length / matches some regex, ... do you have a validation library (annotation? DSL?) or do you roll your own thing?

3 replies · 3 participants

Jan

05/21/2022, 10:41 PM

I'm getting redirected from a website to my ktor server like that: http://localhost:3000/callback#somedata=somedata&moredata=data Is it possible with ktor to read these things after the #?

10 replies · 3 participants

dany giguere

05/23/2022, 2:59 PM

I’m using Ktor 2 and JWT. I want to hash the password when a user creates an account. And then verify it when the user logs in. Which function/package should I user to hash passwords ?

12 replies · 3 participants

Jonathan Lennox

05/23/2022, 6:48 PM

Does ktor 2's

testApplication

work with kotest? I'm trying to use it but my tests are hanging.

:yes: 1

11 replies · 2 participants

Jonathan Lennox

05/23/2022, 7:52 PM

Another question - I'm porting code from ktor 1, and there's a unit test that tests that some code that uses ktor's HttpClient executes properly. Previously the request.body it would pass to the MockEngine would be of type

TextContent

, so the test could inspect it to make sure it had the right content. With ktor 2, however, the request.body is an

OutputStreamContent

- what's the best way for me to verify that its content is correct?

10 replies · 2 participants

rrva

05/24/2022, 5:56 AM

ktor 2.x binary incompatible with ktor 1.x is a pain. I have dependencies which force me to stay on 1.x: https://github.com/awslabs/aws-sdk-kotlin/issues/480 Please don’t do the same for ktor 3.x

2 replies · 3 participants

benkuly

05/24/2022, 12:38 PM

When I add a ktor 2 client plugin with

scope.requestPipeline.intercept(HttpRequestPipeline.Render)

I get

No request transformation found

. Without

intercept

it works (json with content negotiation). Any idea why?

5 replies · 2 participants

Robert Kempton

05/24/2022, 6:22 PM

Hello! I really like the idea of directory based routing, like how apache + php works. There you put files in a directory, and voila, routes defined. In addition to making it easy to define routes, finding routes based on a URL is really easy, you navigate to the file and you're done. I've created a plugin that provides package based routing for ktor. You provide a base package, and add classes in the base package. The package name and class name is used to determine the route path, and all you need to do is implement the KtorRoute interface. AFAIK, this package based routing has never been done before in any jvm language, so I'm sure it seems really weird. Here's the repo where the README has more info on usage https://github.com/snowbldr/ktor-pkg-router It's published to maven central, so is ready to use if you'd like to try it out. I hope you find this useful, and please let me know what you think, I'd be super interested in opinions on whether this is a good idea, a terrible idea, or if there's better ways to implement this.

👍 1

10 replies · 2 participants

Slackbot

05/24/2022, 9:38 PM

This message was deleted.

2 replies · 3 participants

Ryan Brink

05/25/2022, 1:16 AM

👋 can someone from the ktor team give any update on whether this ticket will be seeing any progress in the near future https://youtrack.jetbrains.com/issue/KTOR-774 I’m a solo dev who wrote a plugin for ktor 1 to do this https://github.com/bkbnio/kompendium V2 is really neat and route plugins are a huge feature for something like this, but doing a complete rewrite to support it is just too much for me at the moment. Is there any chance the Ktor team will be publishing their own 1 party plugin soon? I know the community really wants this feature

4 replies · 4 participants

ynsok

05/25/2022, 6:13 AM

Every time I’m doing a request I’m receiving a RESPONSE: 200 OK even if I have cache enabled. So the question is how can I be sure that the current response is from the cache?

HttpClient {
    install(Logging) {
        level = <http://LogLevel.INFO|LogLevel.INFO>
    }
    install(HttpCache)
    install(JsonFeature) {
        serializer = KotlinxSerializer(json = get())
    }
}

client.get {
    url(url = BASE_URL)
    header(HttpHeaders.CacheControl, "only-if-cached")
}

3 replies · 2 participants

ribesg

05/25/2022, 10:32 AM

Why was this closed without being implemented? https://youtrack.jetbrains.com/issue/KTOR-316 I’m checking on this issue every few months so that we can get rid of our custom cors plugin, and I discover that the issue was just closed. I’m kinda angry.

9 replies · 3 participants

Joost Klitsie

05/25/2022, 2:12 PM

Hello hello! I was wondering, I have an app that has a KTOR client. There are many CRUD operations in the app and not really the ability to abstract it all away nicely, due to reified function calls within ktor library. I have for example an abstract base class which I want to have set/get/delete/update operations with the generic types I need. But within this base class, I cannot do:

abstract class ApiDataSource<T>(private val httpClient: HttpClient) {

    fun update(value: T) {
        httpClient.put {
            setBody(value) // <-- T needs to be reified
        }
    }
}

As of course setBody needs to have a reified type. I was looking through the functions, and nowhere can I pass a type or kclass. Am I missing something? Also, a workaround would be to serialize the body myself (by passing the KSerializer in the constructor and Json and setBody with the serialized text), but would this be preferable? I rather serialize through using the ContentNegotiation plugin

3 replies · 2 participants

Tianyu Zhu

05/25/2022, 4:15 PM

Is there an easy way to enforce a rate-limit on a Ktor client? e.g.

HttpClient {
  install(RateLimit) {
    limit = 100.requestsPerSecond
  }
}

1 reply · 2 participants

Tolga ÇAĞLAYAN

05/25/2022, 4:44 PM

Hello to everyone. I want to authenticate firebase admin with ktor. I found examples for Ktor 1.6.8 but how can I do it in 2.0.1. Anyone have an idea about this? Thanks in advance

5 replies · 2 participants

spierce7

05/25/2022, 10:31 PM

I realize this is a long shot, but does Ktor have any support for Unix Domain Sockets?

2 replies · 2 participants

Kirillov Mikhail

05/26/2022, 8:27 AM

Hello everyone We use ktor 2.0.0 with Netty engine We process large tsv, tsv transmitted over http We represent http request body as Flow<ByteBuffer> How we read from channel

fun ApplicationCall.receiveFlow(): Flow<ByteBuffer> = flow<ByteBuffer> {

    val channel = receiveChannel()
    try {
        while (true) {
            val buffer = ByteBuffer.allocate(4096)
            if (channel.readAvailable(buffer) == -1) {
                break
            }
            buffer.flip()
            emit(buffer)
        }
    } catch (e: Exception) {
        log.error("URL: '${request.uri}' error reading body", e)
        throw e
    }
}

If server slowly process http request - we see increase direct byte buffers (non-heap), this buffers create netty for buffering request (buffers grows to 2 gb) I expected back pressure in ktor, but buffers are growing... I communicated with netty users - they recommend disable autoread at channel and use read() manually Does ktor support back pressure? If so, how enable it?

5 replies · 2 participants

Jakub Gwóźdź

05/26/2022, 10:29 AM

Hi there. Docs for default JSON serialization say that “mode is not strict so extra json fields are ignored” but in fact deserialization fails on such unknown fields (ignoreUnknownKeys is set to false). Is this by default or a bug?

4 replies · 2 participants

Muhammad Usman

05/27/2022, 1:57 PM

Hi, Can any one help me to get out of this problem. How can I detect where i have made a mistake , I was trying to configure SSL over Ktor . Thanks

Exception in thread "main" java.security.UnrecoverableKeyException: Get Key failed: Given final block not properly padded. Such issues can arise if a bad key is used during decryption.
	at java.base/sun.security.pkcs12.PKCS12KeyStore.engineGetKey(PKCS12KeyStore.java:457)
	at java.base/sun.security.util.KeyStoreDelegator.engineGetKey(KeyStoreDelegator.java:90)
	at java.base/java.security.KeyStore.getKey(KeyStore.java:1050)
	at io.ktor.server.netty.NettyChannelInitializer.<init>(NettyChannelInitializer.kt:55)
	at io.ktor.server.netty.NettyApplicationEngine.createBootstrap(NettyApplicationEngine.kt:145)
	at io.ktor.server.netty.NettyApplicationEngine.access$createBootstrap(NettyApplicationEngine.kt:29)
	at io.ktor.server.netty.NettyApplicationEngine$bootstraps$2.invoke(NettyApplicationEngine.kt:131)
	at io.ktor.server.netty.NettyApplicationEngine$bootstraps$2.invoke(NettyApplicationEngine.kt:130)
	at kotlin.SynchronizedLazyImpl.getValue(LazyJVM.kt:74)
	at io.ktor.server.netty.NettyApplicationEngine.getBootstraps$ktor_server_netty(NettyApplicationEngine.kt:130)
	at io.ktor.server.netty.NettyApplicationEngine.start(NettyApplicationEngine.kt:177)
	at org.exime.ApplicationKt.main(Application.kt:30)
	at org.exime.ApplicationKt.main(Application.kt)
Caused by: javax.crypto.BadPaddingException: Given final block not properly padded. Such issues can arise if a bad key is used during decryption.
	at java.base/com.sun.crypto.provider.CipherCore.unpad(CipherCore.java:977)
	at java.base/com.sun.crypto.provider.CipherCore.fillOutputBuffer(CipherCore.java:1058)
	at java.base/com.sun.crypto.provider.CipherCore.doFinal(CipherCore.java:855)
	at java.base/com.sun.crypto.provider.PKCS12PBECipherCore.implDoFinal(PKCS12PBECipherCore.java:408)
	at java.base/com.sun.crypto.provider.PKCS12PBECipherCore$PBEWithSHA1AndDESede.engineDoFinal(PKCS12PBECipherCore.java:440)
	at java.base/javax.crypto.Cipher.doFinal(Cipher.java:2207)
	at java.base/sun.security.pkcs12.PKCS12KeyStore.lambda$engineGetKey$0(PKCS12KeyStore.java:401)
	at java.base/sun.security.pkcs12.PKCS12KeyStore$RetryWithZero.run(PKCS12KeyStore.java:291)
	at java.base/sun.security.pkcs12.PKCS12KeyStore.engineGetKey(PKCS12KeyStore.java:395)
	... 12 more

Process finished with exit code 1

1 reply · 2 participants

Julius

05/27/2022, 2:53 PM

Is there an example on how to do websockets with authentication on ktor 2.0.0 somewhere? 🙂 I'm using Firebase authentication in a custom plugin right now (it uses a Baerer Token), I'm currently assuming I have to do a http call first to establish session authentication?

15 replies · 2 participants

robnik

05/28/2022, 9:30 PM

Running a ktor app, as described in the following link, does not seem to work for me. The problem is it does not properly run the

processResources

step, so if I update resources, I have to manually run the gradle task. Is this a bug in the IDE integration? https://ktor.io/docs/intellij-idea.html#run_app

5 replies · 2 participants

Title

robnik

05/28/2022, 9:30 PM

Running a ktor app, as described in the following link, does not seem to work for me. The problem is it does not properly run the

processResources

step, so if I update resources, I have to manually run the gradle task. Is this a bug in the IDE integration? https://ktor.io/docs/intellij-idea.html#run_app

Aleksei Tirman [JB]

05/30/2022, 9:17 AM

What do you mean by updating resources?

robnik

05/30/2022, 5:00 PM

I mean I edit an HTML file under src/jvmMain/resources.

Aleksei Tirman [JB]

05/30/2022, 5:28 PM

So do you have a multiplatform project and you made some modifications to the configuration of a generated project?

robnik

05/30/2022, 7:28 PM

Yes, it's a multiplatform project. Not sure if I changed anything. I could try starting a new project and copying in my source code, to see if that helps.

Aleksei Tirman [JB]

06/01/2022, 9:07 AM

I’ve asked that because the Ktor plugin for IDEA cannot create multiplatform projects yet.

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