kotlinlang #ktor

but it is always empty. I am using version 0.9.4. I saw on the following post on stackoverflow that it was a known issue fixed in v0.9.2. Anyone knows if it is still an issue in the latest version ? https://stackoverflow.com/questions/49895169/ktor-unable-to-receive-post-body-on-server

Semigradsky

09/09/2018, 10:15 AM

Hi! Where can I find an example of using the

MultiPartFormDataContent

📝 1

✅ 1

Nikky

09/10/2018, 9:53 AM

i think this page points users at the wrong artifacts in gradle

Nikky

09/10/2018, 10:34 AM

so now.. is there any example of how you can handle url redirects on ktor-client manually? i am dealing with a api returning me incorrectly escaped urls, and with fuel i just disabled redirects and looped until it finally resulted in a file

Nikky

09/10/2018, 4:54 PM

https://ktor.io/clients/http-client/features/json-feature.html this page implies kotlinx.serialization is only useable on native with the ktor client ?

➕ 1

Nikky

09/11/2018, 8:06 AM

so i have been experimenting with kotlinx.serilaizazion for ktor-client . https://gist.github.com/NikkyAI/2e2891ccf67d423c523311f0b43ca57b it seems to be a mess currently, registering classes for read/write mapper seems to make using generics like `List`s impossible this could work if the ktor-client Framework could pass reified types down instead of assuming the Json serializer can handle Any PS: sorry for the many edits, slack keeps cutting out and not actually saving

Nikky

09/11/2018, 12:52 PM

seems like the buildsystem freak out once i try to add a module with

expectedBy project(':ktor-client:ktor-client-features:ktor-client-json')

Janez Štupar

09/11/2018, 2:07 PM

Hi there! I have already tried asking in RX channel, but nobody responded. I am trying to call an Observable pipeline from a Ktor request handler. The problem is that response writer is already closed before Observable produces a result, how do I go about this?

Nikky

09/11/2018, 5:53 PM

or maybe typeinfo actually gets me everything i need.. i will experiment

Nikky

09/11/2018, 9:11 PM

i could do a

expect fun serializerOf(typeInfo: TypeInfo): KSerializer<Any>

to move al lthe jvm specific cruft away.. but i am not sure if that would be considered a good idea

rharter

09/12/2018, 3:16 AM

I'm trying to make a high level visual of the architecture of a Ktor Application. Does this look accurate? At this point I'm not going into specifics about the phases, features, and engines, but is it safe to say this is an accurate picture of an entire application?

Nikky

09/12/2018, 10:00 AM

general question for PRs on ktor.io .. to keep them up to date, rebase on master/origin or merge ? i do not see many merges in the history so i assume you always rebase, just want to ask and make sure

gildor

09/12/2018, 10:28 AM

When should we expect Ktor version with support of 1.3 and stable coroutines? I’m ready to try snapshot version on our project

dave08

09/13/2018, 12:22 PM

Is Ktor going to support Coroutines 0.26.0 soon?

:yes: 1

dave08

09/16/2018, 3:26 PM

Right now I have:

val kodein = Kodein.direct {
     .....
}

fun Routing.someController(
		someRepository: SomeRepository
) { ... }

fun Application.module() {
      routing {
        someController(kodein.instance())
    }
}

But I want to be able to access the

kodein

instance inside the

Application.module()

in a way that I can replace it in my tests... @Deactivated User?

✅ 1

📝 1

spand

09/17/2018, 12:34 PM

Any particular reason

GsonSerializer.read

casts deserialized json to

Any

? And not

Any?

dave08

09/17/2018, 7:51 PM

Isn't that what ContentNegotiation does? For example https://github.com/ktorio/ktor/blob/master/ktor-features/ktor-gson/src/io/ktor/gson/GsonSupport.kt, uses a reader... @enleur

gildor

09/18/2018, 7:34 AM

Always better to use SSL

bdawg.io

09/18/2018, 7:58 PM

I wrote a custom authenticator, but the routes seem to be getting called without authentication anyways. Any ideas from the routing and the authentication pipeline snippets?

Untitled.kt

09/19/2018, 10:26 AM

📣 ktor

0.9.5

and

0.9.6-alpha-1-rc13

has been released. They have the same features but the second is built with Kotlin 1.3 RC. * Added shorthand client functions for HEAD, OPTIONS, PATCH and DELETE methods (#562) * URLBuilder's parser improved (#553, #567) * Improved client's cookie matching and processing * Introduced CallId feature * Added MDC support to CallLogging feature * Fixed setting charset encoding for non-text content types * Added

respondOutputStream { }

response function * Migrated to Kotlin 1.2.70 * Split Infrastructure phase into Monitoring and Features phases Migration guide https://ktor.io/quickstart/migration/0.9.5.html

🎉 14

orangy

09/19/2018, 10:35 AM

We’d like feedback on the

CallId

feature. If you have a homebrew version of such a feature, or would like to try it, please tell us how it works and if it suites your needs. That’s the last feature before we go towards 1.0 and start fixing only bugs and biggest pain points.

christophsturm

09/19/2018, 11:08 AM

@Deactivated User I’m trying to build the mmo-poc but it say

Could not find io.ktor.client:ktor-client-redis:0.2.0

, and indeed there seems to be no version 0.2.0 of that

Nikky

09/19/2018, 1:02 PM

is there a reason this is Any ? https://github.com/ktorio/ktor/blob/master/ktor-client/ktor-client-core/src/io/ktor/client/request/HttpRequest.kt#L84 or did nothing in the pipeline require this to me a reified type parameter yet ?

Nikky

09/19/2018, 1:30 PM

and something else i tried to do which failed was

<http://client.post|client.post><List<Users>>(...)

✅ 1

mwudka

09/20/2018, 9:20 PM

I'd like to build a ktor server that uses the embedded Netty engine, exposes an SSL endpoint, and validates client certificates against a custom CA. Serving over SSL is easy and fun thanks to the magic of ktor, but I'm struggling with validating client certificates. I can see in https://github.com/ktorio/ktor/blob/master/ktor-server/ktor-server-netty/src/io/ktor/server/netty/NettyChannelInitializer.kt#L47 that the

NettyChannelInitializer

uses the familiar

SslContextBuilder

from Netty. I think that calling

clientAuth

and

trustManager

on the

SslContextBuilder

instance would do what I want. My problem is that I can't see how to pass settings into my engine config to make

NettyChannelInitializer

do what I want. Any ideas? Or is this not possible in the current version of ktor, and I should use nginx as a reverse proxy?

oshai

09/20/2018, 11:33 PM

I am trying to install application event but it is not running at startup

gildor

09/21/2018, 7:39 AM

I tried to find any information about support of kotlinx.serialization on Ktor, I saw that ktor-client-json is there, but it only for http client, is there any issue which I can track to see progress?

Alexander Vasiljev

09/21/2018, 8:24 AM

Hello. 1st of all, ktor is super. I've built a sample project with it in no time. I have some difficulties it coupling locations and views (built with html dsl). My views are refactored into separate classes, like this one, for the main template.

MainTemplate.kt

Title

Alexander Vasiljev

09/21/2018, 8:24 AM

MainTemplate.kt

Deactivated User

09/21/2018, 8:25 AM

what do you mean by coupling locations and views?

Alexander Vasiljev

09/21/2018, 8:29 AM

As you see, template references locations https://ktor.io/servers/features/locations.html they are defined elsewhere in the project:

@Location("/products")
class Products
@Location("/platforms")
class Platforms
@Location("/deviceModels")
class DeviceModels

so instead of using error-prone string literals inside template, like

a(href = "/products") { +"Products" }

one is able to

a(href = href(Products())) { +"Products" }

-- the feature is great!

The problem is to resolve the location (

href(Products())

) inside the template. Corresponding function

href

is available only in Routing context. For now I am using the trick:

var href: (Any) -> String = { "" }

fun Routing.commonRoutes() {

    href = fun(location: Any): String { return application.locations.href(location) }
  // etc.

and wonder if more elegant solution might exist?

Or maybe ktor framework will add some global function to resolve location even out of Routing context?

Deactivated User

09/21/2018, 8:57 AM

Aha, let me check

I’m checking why href depends on the Routing/ApplicationCall context. Still I guess you can create a

Template

subclass with a

call: ApplicationCall

, and make a href method or extension method for that class that calls the right method with the right context

I believe that the context is used to cache the information per type

Alexander Vasiljev

09/21/2018, 10:21 AM

Your suggestion is correct, yet the code would become little too verbose in my scenario:

fun Routing.productRoutes() {
    get<Products> { _ ->
        call.respondHtmlTemplate(
                ListTemplate(
                        title = "All products",
                        tableModel = allProductTableModel(),
                        href = fun(location: Any) = this@productRoutes.application.locations.href(location)
                )
        ) {}
    }
}

same code for every get or post

instead of

fun Routing.productRoutes() {
    get<Products> { _ ->
        call.respondHtmlTemplate(
                ListTemplate(title = "All products", tableModel = allProductTableModel())
        ) {}
    }
}

and pithiness is what we love kotlin (and ktor) for

orangy

09/21/2018, 10:34 AM

I admit

Locations

is a feature that needs much more attention, but unfortunately right now we don’t have enough resource. It’s not about coding, more about designing it better.

In general, we don’t really allow static context, it doesn’t work well with multiple servers in the single process, doesn’t work great with multithreading, etc. So you will still have to pass some context into a template.

All you need is

Location

feature instance, so it shouldn’t be too hard?

If you’re fine with some statics, you can have a global lateinit variable that you initialize with an

Application

instance and use it everywhere.

But I would suggest against it 🙂

Alexander Vasiljev

09/21/2018, 10:40 AM

Current solution is nothing more then hack, that would break in multithread environment, I agree completely here.

orangy

09/21/2018, 10:41 AM

Static application (or Location instance) won’t break in multithreaded environment, given you have only one app in a JVM and you initialize it once and never change.

Deactivated User

09/21/2018, 10:43 AM

you can also make your html builder suspend, and use the

coroutineContext

as a dependency container 🤨, like a scala implicit. Though I wouldn’t do that either the main problem with globals (in addition to multithreading issues) is testing or multiple applications, you normally want to start things from scratch. Even when in control at the beginning, it is a bad practice in general

Alexander Vasiljev

09/21/2018, 10:43 AM

It’s not about coding, more about designing it better.

So I provided you with feedback from a real world application. Anyway, thank you for a wonderful framework.

orangy

09/21/2018, 10:47 AM

Thanks for feedback 🙂 It would be awesome if you could post an issue to GitHub so we have it handy when we’ll work on the design.

@Deactivated User coroutine context is a nice idea indeed! However it would require changes to kotlinx.html I believe

Alexander Vasiljev

09/21/2018, 10:49 AM

or Location instance

I do not see that Location instance would be of any use though. E.g. there are actually @Location("/products") class Products { @Location("/{id}") class Item(val id: Int) } and later:

private fun ProductModel.asRowModel(): RowModel {
    return RowModel(listOf(RefCell(id) { href(Products.Item(id)) }, PlainCell(name)))
}

It is possible to embed links into list view. Each to corresponding item:

href(Products.Item(id))

for every item in the list

orangy

09/21/2018, 10:51 AM

I mean

Locations

feature instance, like

application.locations

Alexander Vasiljev

09/21/2018, 10:51 AM

Ah, I see

Deactivated User

09/21/2018, 10:54 AM

@orangy I thought that the DSL was inline already. But just checked and it is not the case, so yeah, it wouldn’t work directly. You would have to get the links before the DSL.

Alexander Vasiljev

09/21/2018, 11:31 AM

@orangy here is an issue: https://github.com/ktorio/ktor/issues/597

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