Hi, I got warning `Inappropriate blocking method call` when call blocking method in suspend function...

# coroutines

[ken_kentan]

Hi, I got warning Inappropriate blocking method call when call blocking method in suspend function. I don't know that why this code was warned...
How to fix this?

import java.net.URL

suspend fun foo(bar: String): String {
    if (bar.isEmpty()) {
        return ""
    }
    return withContext(<http://Dispatchers.IO|Dispatchers.IO>) {
        // warning: Inappropriate blocking method call
        URL("<https://www.example.com>")
            .readText()
    }
}

[octylFractal]

it seems fine, I believe this is an intellij bug but I can't find an exact issue that looks the same

[octylFractal]

you might want to file one yourself

[elizarov]

https://youtrack.jetbrains.com/issue/IDEA-227359

[elizarov]

Nope… no that one

[elizarov]

Actually, cannot reproduce. Works fine for me.

[elizarov]

If I remove withContext it complains on URL which is a bug: https://youtrack.jetbrains.com/issue/KT-39352

[elizarov]

But it does not complain on `readText`: https://youtrack.jetbrains.com/issue/KT-39476

[louiscad]

Where is that list of blocking methods?

[elizarov]

There’s no like. It consider any Java method that throws IOException to be potentially blocking (which is quite a good heuristic for Java world)

[elizarov]

And it is not really a coroutine-inspection. It is quite complicated beast that understands “non blocking reactive contexts” and warn on potential blocking code usage in them

[ken_kentan]

Thank you. I understood.
I will ignore this warning using @Suppress annotation.

[EyeCon]

I had the same issue using Jsoup's `get()`which I suppressed.

[EyeCon]

val doc = Jsoup.connect(workUrl).get()

...triggers the same warning.