ChromeDPClient hangs when using a WS URL instead of HTTP

[pcarrier]

Version

6.6.0-1391447

What happened?

This code hangs forever:

import org.hildan.chrome.devtools.protocol.ChromeDPClient

suspend fun main() {
    val client = ChromeDPClient(
        "ws://127.0.0.1:9222/devtools/browser/9e0c7e2a-72a8-4120-8047-c4487f3c1c14",
        overrideHostHeader = true
    )
    client.webSocket().browser.close()
}

Reproduction and additional details

No response

Kotlin target platforms

JVM (non-Android)

[joffrey-bion]

With the ChromeDPClient you don't need the full WS URL. You just need the base HTTP URL http://127.0.0.1:9222, like this:

val client = ChromeDPClient("http://127.0.0.1:9222", overrideHostHeader = true)
val browserSession = client.webSocket()

Check the README for how to get started: https://github.com/joffrey-bion/chrome-devtools-kotlin/tree/main?tab=readme-ov-file#connecting-to-the-browser

If you want to use the WS URL directly and save one intermediate HTTP call, you can use the Ktor HttpClient directly with the chromeWebSocket extension like this:

val httpClient = HttpClient { ... }
val browserSession = httpClient.chromeWebSocket("ws://127.0.0.1:9222/devtools/browser/9e0c7e2a-72a8-4120-8047-c4487f3c1c14")

Please let me know if this fixes your issue.

[joffrey-bion]

That being said, it is still a problem that your original code hangs. It should instead fail with an error message that hints towards this solution. So thanks for reporting this, I'll check.

[pcarrier]

Thanks! For reference, needed:

    val client = HttpClient {
        install(WebSockets)
        install(DefaultRequest) {
            headers["Host"] = "localhost"
        }
    }

[joffrey-bion]

Oh yeah, my bad, the HttpClient needs a bit of configuration, as you can see in the ChromeDPClient implementation. But you can also avoid this hassle if you just use the HTTP URL with ChromeDPClient.