Hi, I'm trying the `.sse()` function in Ktor 3.0 ...

# ktor

[Zane W]

Hi, I'm trying the .sse() function in Ktor 3.0 beta 1, and I get

io.ktor.sse.SSEException: io.ktor.sse.SSEException: Expected status code 200 but was: 400 at io.ktor.client.plugins.sse.BuildersKt$serverSentEventsSession$2.invokeSuspend(builders.kt:56) at _COROUTINE.BOUNDARY.(CoroutineDebugging.kt:46) at kotlinx.coroutines.flow.AbstractFlow.collect(Flow.kt:230) at kotlinx.coroutines.flow.FlowKt__ErrorsKt.catchImpl(Errors.kt:156) at kotlinx.coroutines.flow.FlowKt__ErrorsKt$catch$$inlined$unsafeFlow$1.collect(Errors.kt:114)

my request body works in other clients.
When I get this error, I don't know the response body, and I can't access the response header. It just failed without any way to know why. btw, I also set the expectSuccess = false in the client, but it does not work apparently.

[Zane W]

when I enabled the logging, I found the request body is empty which causes the 400 error.
but the request body is set through setBody , the requestBody variable is a json string:

.sse(url, request = {
                method = HttpMethod.Post
                headers {
                    append(HttpHeaders.Accept, ContentType.Text.EventStream)
                    append(HttpHeaders.ContentType, ContentType.Application.Json)
                }
                setBody(requestBody)
            }) {...}

all other fields are set allright.

[Zane W]

followed the client side debugging, it shows the body was correctly set into HTTPRequestBuilder, but later creating the ClientSSESession, it appears dropped all the body and content type information. I don't know why.

[Aleksei Tirman [JB]]

Thank you for the issues in YouTrack.