Hi, I'm using ktor in a Kotlin multiplatform proje...

# ktor

[Reece H. Dunn]

Hi, I'm using ktor in a Kotlin multiplatform project that supports jvm, native, and node-js. I'm trying to get the socket client example working, but:
1. <http://Dispatchers.IO|Dispatchers.IO> from kotlinx.coroutines is jvm only.
2. runBlocking from kotlinx.coroutines is jvm and native only.
Is there a multiplatform example, or platform-specific examples for native and node-js?

[Big Chungus]

Node is single threaded so switching dispatchers does almost nothing - I'd just expect typealias into main dispatcher on node.

As for runBlocking, again that's impossible on js due to singleThreaded nature (although node does have some blocking io)

[Big Chungus]

Generally runBlocking usage is discouraged if you can avoid it.

[Big Chungus]

Hope this helps

[Reece H. Dunn]

Trying to use the ktor APIs without runBlocking results in a Suspend function 'readUTF8Line' should be called only from a coroutine or another suspend function error. I don't particularly care about it being multi-threaded, or runBlocking specifically, just how to implement a functioning ktor socket client in multiplatform. -- I'm mentioning runBlocking here as that is what the ktor sample code is using. (Note: I'm new to Kotlin coroutines and ktor sockets, so I don't know the best practices.)

[Big Chungus]

One way to solve this would be to make your entire function chain suspend (all the way up to main)

[Big Chungus]

Alternatively coroutines have some helpers to integrate with promises

[Reece H. Dunn]

Thanks. I'll investigate those options.

[Reece H. Dunn]

After further investigation, I've found that the sockets library only works for JVM. Given that, and the lack of other channels JSON-RPC/LSP uses (stdio, windows pipes, node-ipc, etc.) I've decided to not use ktor to provide the IO support.