What’s the standard way to return a 400 response when there is an error deserializing Json? Wrapping each body deserialization with a try/catch, looking for

kotlinx.serialization.json.JsonParsingException

, or using an equivalent extension function seems error prone and verbose. Surely there is a way to do this at the feature level?

On using ktor client and getting 409 I get ClientRequestException on attempt to read a body with

response.readText()

. On the other hand it is official recommendation for 409 response to get payload. How to get the payload with ktor?

I’m trying to compile K/N project with just released

1.3.50

and ktor and having ABI incompatibility (worked with

1.3.41

):

w: skipping /Users/asmirnov/.gradle/caches/modules-2/files-2.1/io.ktor/ktor-client-core-macosx64/1.2.3/4987d836935e25e127e275b7147fa24ff9b24b1b/ktor-client-core.klib. The abi versions don’t match. Expected ‘[14]’, found ‘9’

w: The compiler versions don’t match either. Expected ‘[]’, found ‘1.3-rc1-11132’

e: Could not find “/Users/asmirnov/.gradle/caches/modules-2/files-2.1/io.ktor/ktor-client-core-macosx64/1.2.3/4987d836935e25e127e275b7147fa24ff9b24b1b/ktor-client-core.klib” in [/Users/asmirnov/Documents/dev/src/cmp/project/desktop/performance_app, /Users/asmirnov/.konan/klib, /Users/asmirnov/.konan/kotlin-native-macos-1.3.50/klib/common, /Users/asmirnov/.konan/kotlin-native-macos-1.3.50/klib/platform/macos_x64].

Anyone? As far as i can see Ktor 1.2.3 is not yet released for 1.3.50 and the most recent one is https://mvnrepository.com/artifact/io.ktor/ktor-client-core/1.2.3-1.3.50-eap-5

is there any kind of arrow-kt integration for Ktor (specifically Ktor-client stuff)? Currently im using extension functions on HttpClient like

getSafe

that just wrap the

HttpClient.get

method in a `Try`object, but i wonder if there is any way to get that out of the box / with a library

Hi guys, in the KTOR documentation there is no info about coroutine scoping, in essence what's the scope the call is run into, what if I launch a coroutine within a call and then the whole call is timedout? will the parent cancel it? @cy I ask because I am afraid my coroutines will leak if I don't pay attention to this, even though I always try to fork everything on the context of the parent call, not global! @e5l

Hey all. Does anyone know what the minimum Android SDK version supported for the CIO engine is?

Any news on a

1.3.50

-based Ktor 'update' release? 🤞 K

Hey 🙂 what is the “official” way to autogenerate OpenAPI or Swagger specs in ktor ?

Can I add body to DELETE request?

Hi. Does

ktor

have any plans in future to implement a huge customization futures like

spring

project have? For example in spring exist inner DI with which you could in next configuration steps retrieve some bean from previous. Or in runtime replace any bean in context by creating it by yourself. For now ktor doesn’t contain any DI system internal and such cases is difficult to implement without it. And for now I couldn’t imagine how to implement something like spring starters which are comes with new beans inserting to context + bean post processors which could customize beans depends on conditions/previous creatated beans/etc. I don’t say that

ktor

is going by wrong way or what it’s had some invalid architecture constructions. Me really likes how it constructs internal. And I just want to know, is at ever possible to do something like in spring for ktor?

Hi all, could someone tell me how I can intercept after the authentication feature pipeline has been finished? I want to load an user profile after being logged in

When I intercept ApplicationCallPipeline.Fallback, I cannot access the response message of my response, only the status, any reason why?

Hey 🙂 I am getting

java.io.IOException: Connection reset by peer

from Netty for all my requests that were answered with a 200. I understand that the client closed the connection, but why is then an exception thrown? Did somebody experience this before ?

https://kotlinlang.slack.com/archives/C0A974TJ9/p1566853984325300 Anybody doing this or knows if it’s possible?

I am having issues with docker containerized application, it is not creating sessions and throws

java.util.NoSuchElementException: No session data found for id b8130c2077351466

, it works fine without containerizing it. Also, I am new to docker . Is there something I need to do that I am missing?

How do I use MockEngine (https://ktor.io/clients/http-client/testing.html)? I can see how I can set it up, but I have a class with a private

HttpClient

Hi, is there any way to pass a cert when making a request with Ktor Client? Something like…

# python requests lib
        url = '<https://example.com>'
        headers = {
            'Content-Type': 'application/x-www-form-urlencoded'
        }
        cert = (path_to_cert_file, path_to_key_file)
        data = {
            'username': username,
            'password': password
        }
        r = <http://requests.post|requests.post>(url, headers=headers, cert=cert, data=data)

Hey, I would like to use ktor to connect to an api which uses self-signed SSL certificate. I've figured out how to achieve this with

OkHttp

on Android, but is there any way to achieve this with the

Ios

engine on iOS as well?

Hi, is there a way in ktor to close HTTP connection with client from server after responding to a post request? Cause a client seems to be keeping connection alive without reusing it.

Is Ktor client (iOS) supported with worker.execute? The following code will freeze on iOS. Issue 678 describes the same issue and closed without resolution

hello there, I'm using ktor websockets with netty and getting the following stacktrace (thread):

hi! how can i tell the http client to allow a string as body when content-type = application/json? as soon as i set that header i get the exception "class java.lang.String cannot be cast to class io.ktor.client.call.HttpClientCall"

Hello, I was wondering if someone from Ktor is looking into the following issue. I would really like a solution for this. If anyone has any suggestions how I could fix this, please let me know. https://github.com/ktorio/ktor/issues/1263

hi! anyone experience this exception when using the Apache HTTP client? java.lang.IllegalStateException: Unexpected request state READY

I'm having a hard time understanding when to use the

handle

method in a

Route

. My initial thought was that it is a place to put a piece of code that should execute every time the route is triggered - could be checking a cookie for relevant info and reacting accordingly. But it doesn't seem to work that way. Can anyone shed some light on this one please 🙂

1. Context + I am connecting from a client with Ktor version 1.2.3 raw socket with TLS to the TCP Input Plugin Version v6.0.3 with Logstash 7.3. 2. Issue + TLS/SSL negotiation fails and I am getting a

TLSException

with error message +

Unknown hash algorithm: 8

3. Analysis: - The accuracy of all key and certificate files confirmed with successful openssl: +

openssl s_client -connect IP:PORT -CAfile cacert.pem -cert client_crt.pem -key client_key.pem

- The output of

openssl

gives a hint at what might be wrong: + [source,subs="quotes"] .Requested Signature Algorithms:

ECDSA+SHA256:**0x04+0x08**:RSA+SHA256:ECDSA+SHA384:**0x05+0x08**:RSA+SHA384:**0x06+0x08**:RSA+SHA512:RSA+SHA1

+ .Shared Requested Signature Algorithms: ---- ECDSA+SHA256RSA+SHA256ECDSA+SHA384RSA+SHA384RSA+SHA512:RSA+SHA1 ---- - I assume that the requested signature algorithms come from the server and include hash code 0x08 (as in

0x04+0x08

) - I also assume that the

0x08

hash code comes from the new "Intrinsic" hash hash code introduced in RFC 8442 and registered by IANA [https://www.iana.org/assignments/tls-parameters/tls-parameters.txt] - Looking into the source code of the TLS handshake routines of ktor-network-tls I find in

io/ktor/network/tls/extensions/SignatureAlgorithm.kt

the following snippet: +

kotlin
enum class HashAlgorithm(val code: Byte, val openSSLName: String, val macName: String) {
    NONE(0, "", ""),
    MD5(1, "MD5", "HmacMD5"),
    SHA1(2, "SHA-1", "HmacSHA1"),
    SHA224(3, "SHA-224", "HmacSHA224"),
    SHA256(4, "SHA-256", "HmacSHA256"),
    SHA384(5, "SHA-384", "HmacSHA384"),
    SHA512(6, "SHA-512", "HmacSHA512");

    companion object {
        /**
         * Find hash algorithm instance by it's numeric [code]
         * @throws TLSExtension if no hash algorithm found by code
         */
        fun byCode(code: Byte): HashAlgorithm = values().find { it.code == code }
            ?: throw TLSException("Unknown hash algorithm: $code")
    }
}

- It seems to me that throwing an exception when encountering an unknown hash algorithm is not necessary. The algorithm would be ignored anyway when the list of mutually supported algorithms is build. Questions: . Is my analysis correct? . Should I file an issue for ktor on Github and propose the following change options: .. Add

INTRINSIC(8, "INTRINIC", "Intrinsic")

to the

HashAlgorithm

enum class .. Change the return type of

byCode()

to a nullable and ignore null when building the list of requested hash algorithms . Is there a way to prevent a ruby.openssl based server (not ktor) from sending the new hash code value 8? (Please ignore this question if it does not belong to ktor|kotlinlang)

Hello, I am an Android Developer, trying to learn backend development using ktor. Are there open source projects that uses ktor? I want to know the common stack/libraries used together with ktor.

I am updating ktor but something changed here:

Hey guys, new to Kotlin and this channel, please help me. Basically I'm facing this issue. https://github.com/ktorio/ktor/issues/253 I'm not able to read from application.conf file, please help

Hey Guys, i have a performance question that is not directly related to K-Tor, but since i am building my backend & clients using ktor/multiplatform i will ask it here (i am primally an android dev). I have a bigger data set around 15 000 entries, the whole set is around 20 MB in MySQL and i was experimenting a bit with the performance tuning when i want to get one element. My assumption was that if i cache the collection in

HashMap<Long,MyObject>

and don't access the DB all the time i will get faster response times, but i did not . It takes more time to execute the request if i add this "cache (hash map)" there. Is it fine to use mysql only, since it contains some sort of caching?