What does this mean? ```TRACE i.k.s.p.c.ContentNeg...

# ktor

[CLOVIS]

What does this mean?

TRACE i.k.s.p.c.ContentNegotiation - Skipping because the type is ignored.

I'm using testApplication with just the ContentNegotiation plugin using KotlinX.Serialization

The test fails with 400 Bad Request with no provided body, and Ktor seems to log that it decided to ignore the body for some reason?

[e5l]

Hey @CLOVIS, thanks for the question. It means that body with that type is not usually handled with ContentNegotiation plugin(like String or ByteReadChannel). If it's necessary, you can remove the type from ignored: https://api.ktor.io/ktor-server/ktor-server-plugins/ktor-server-content-negotiatio[…]egotiation/-content-negotiation-config/remove-ignored-type.html

[CLOVIS]

Strange. This is the type I'm serializing:

@Serializable
class New(
	val name: String,
)

[CLOVIS]

Is it because it has a single String field? It's not a value class

[e5l]

This type is not ignored by default

[CLOVIS]

Is there an easy way to turn on additional logging to get more information on what's going on?

[CLOVIS]

According the client logging, the entire request is:

METHOD: HttpMethod(value=POST)
COMMON HEADERS
-> Accept: application/json
-> Accept-Charset: UTF-8
-> Authorization: Bearer fake:0
CONTENT HEADERS
-> Content-Length: 27
-> Content-Type: application/json
BODY Content-Type: application/json
BODY START
{"name":"A new department"}
BODY END

[CLOVIS]

It's definitely sending my class, not just a primitive

[e5l]

Yep, but this logging is for the request body, and the top one is for the response

[CLOVIS]

Oh. The client isn't logging anything for the response.

[e5l]

Could you tell me how you're receving the response body?

[CLOVIS]

Do you mean, the client-side code to deserialize?

[e5l]

server side request handler

[CLOVIS]

Using call.receive() : https://gitlab.com/opensavvy/pedestal/-/blob/main/spine-ktor/spine-ktor-server/src/commonMain/kotlin/opensavvy.spine.ktor.server/Server.kt#L90

[CLOVIS]

Sorry, that's anything but a small example 😅

[CLOVIS]

The type is not visible in this file because of generics, but it is the New class I shared above

[CLOVIS]

I have used this exact function in other projects so I think it's unlikely that's where the problem is, I expect it's something to do with the TestApplication configuration, but I have no idea what it could be

[e5l]

could you tell me how the TestApplication is configured?

[CLOVIS]

It has the Routing , ContentNegotiation and Authentication plugins (don't hesitate to ask for the specific config for each, this project is FOSS)

Specifically for ContentNegotiation:

val ApiJson = Json {
	encodeDefaults = false
}

install(ContentNegotiation) {
	json(ApiJson)
}

[CLOVIS]

(this is Ktor 2.2.1 btw, I believe it's either the most recent version or close to it?)

[e5l]

Could you log an issue with small repro? I will take a look

[CLOVIS]

In the process in minifying it, I found something interesting: if I remove the authenticate {} block, it works

[CLOVIS]

If you want to run it locally:
• The repository is https://gitlab.com/opensavvy/formulaide
• The problem can be reproduced on commit 80da9f76f5fd67114346adf8e9ea8b15ee86a56b
• The reproduce, run remote-server:test , more precisely opensavvy.formulaide.remote.server.utils.ReproductionTest
• As it is, the test returns a 400 Bad Request with no body
• By disabling authentication (line 31), the test passes

[CLOVIS]

Ah 😐 found the probkem

[CLOVIS]

It's the : in:

-> Authorization: Bearer fake:0

[CLOVIS]

I'm creating an issue to make it a better error message 🙂

[CLOVIS]

https://youtrack.jetbrains.com/issue/KTOR-5409/The-error-message-is-not-helpful-when-authenticating-with-a-bearer-header-with-a-colon