Can anyone tell me the correct usage of this command in Raw Sockets ``` input.read { byteBuffer } `...

# ktor

[otakusenpai]

Can anyone tell me the correct usage of this command in Raw Sockets

input.read { byteBuffer }

Where input is a ByteReadChannel object ?

[otakusenpai]

The problem is that when i instantiate it with a size of 512, the data from the println shows the size as 512 but the contents of the data isnull

[otakusenpai]

var byteBuffer = ByteBuffer.wrap(ByteArray(512))
            input.read { byteBuffer }
            data = String(byteBuffer.array(), Charset.forName("ASCII"))
            println("Data size = ${data.length}")

[otakusenpai]

I changed the code to this

var byteBuffer = ByteBuffer.wrap(ByteArray(512))
            val bbToString = { data = String(byteBuffer.array(), Charset.forName("ASCII")) }
            input.read { byteBuffer -> bbToString }

But its giving me this error

[otakusenpai]

java.lang.Exception: BasicConnection.kt: Didn't receive data from connection!
	at com.github.otakusenpai.testbot.connection.BasicConnection$receiveData$1.doResume(BasicConnection.kt:83)
	at kotlin.coroutines.experimental.jvm.internal.CoroutineImpl.resume(CoroutineImpl.kt:42)
	at kotlinx.coroutines.experimental.DispatchedTask$DefaultImpls.run(Dispatched.kt:168)
	at kotlinx.coroutines.experimental.DispatchedContinuation.run(Dispatched.kt:13)
	at kotlinx.coroutines.experimental.EventLoopBase.processNextEvent(EventLoop.kt:166)
	at kotlinx.coroutines.experimental.BlockingCoroutine.joinBlocking(Builders.kt:69)
	at kotlinx.coroutines.experimental.BuildersKt__BuildersKt.runBlocking(Builders.kt:45)
	at kotlinx.coroutines.experimental.BuildersKt.runBlocking(Unknown Source)
	at kotlinx.coroutines.experimental.BuildersKt__BuildersKt.runBlocking$default(Builders.kt:35)
	at kotlinx.coroutines.experimental.BuildersKt.runBlocking$default(Unknown Source)
	at com.github.otakusenpai.testbot.connection.BasicConnection.receiveData(BasicConnection.kt:73)
	at com.github.otakusenpai.testbot.MainKt.main(main.kt:89)
Received data: null

[cy]

Don't get, read{ } lambda has Unit return type so I don't get what are you trying to do

[cy]

To read bytes to a byte buffer use readAvailable or readFully

[otakusenpai]

ok

[otakusenpai]

I'll try

[cy]

Please read kdoc for read if you are sure that you really need exactly this function

[otakusenpai]

where is the link ?

[cy]

Can't you simply navigate it it?

[otakusenpai]

no just the link to kdoc, i was previously reading the ktor.io docs

[cy]

Why not? Doesn't it work if you Ctrl-click on it?

[cy]

It should work out of the box

[cy]

if not, you can read it here <https://github.com/Kotlin/kotlinx-io/blob/eap13/kotlinx-coroutines-io/kotlinx-coroutines-io-jvm/src/main/kotlin/kotlinx/coroutines/experimental/io/ByteReadChannelJVM.kt#L152>

[otakusenpai]

I just want to know what this kdocs is that you speak about

[cy]

kdoc is just like javadoc but different syntax (markdown instead of html)

[otakusenpai]

ok so where can i download this kdoc for ktor ?

[cy]

IDEA usually shows it in the documentation popup but it only work if you have downloaded sources

[otakusenpai]

nvm found it

[otakusenpai]

https://api.ktor.io/0.9.5/

[cy]

yes, you can browse it here but it is not yet published for 1.0.0-alpha-* yet

[Deactivated User]

https://api.ktor.io/1.0.0-alpha-1/

Still that documentation is from kotlinx-io so not included here