Hi! Is there a way to log the exact request a Ktor client is sending? Not just the headers, but also...

# ktor

[CLOVIS]

Hi! Is there a way to log the exact request a Ktor client is sending? Not just the headers, but also the full body contents

[russhwolf]

I think it's supposed to happen when you do LogLevel.BODY or LogLevel.ALL once https://youtrack.jetbrains.com/issue/KTOR-426 is fixed.

[CLOVIS]

Thanks, I'll look into that

[MJegorovas]

In the mean time you can use something like this (I use it for Android):

class BodyLoggingInterceptor {
    companion object : HttpClientFeature<Nothing, BodyLoggingInterceptor> {
        override val key: AttributeKey<BodyLoggingInterceptor> =
            AttributeKey("BodyLoggingInterceptor")

        override fun prepare(block: Nothing.() -> Unit): BodyLoggingInterceptor =
            BodyLoggingInterceptor()

        override fun install(feature: BodyLoggingInterceptor, scope: HttpClient) {
            scope.sendPipeline.intercept(HttpSendPipeline.Monitoring) {
                val body = context.body
                if (body is TextContent) {
                    val content = body.text
                    for (i in content.indices step 1024) {
                        Log.d(
                            "BodyLoggingInterceptor",
                            content.substring(i, min(content.length, i + 1024))
                        )
                    }
                }
            }
        }
    }
}

And then just install in the client just as any other feature.

[CLOVIS]

LogLevel.ALL does print the BODY but only for JSON requests, I'm trying to debug a Multipart request 😕

[CLOVIS]

@MJegorovas Thanks for your code, but it's the same thing, it only prints JSON body and not Multipart body... Unless you're certain that it works and then my code is completely wrong, which would explain many things 🤔

[MJegorovas]

Sorry, for not getting back to you earlier. I was unsuccessful to get MultiPartFormDataContent content out of it because it is already processed as List<PreparedPart> at this point, so you'll need some other way to log this.

[CLOVIS]

I see. Do you have any tips/clues to how I can do this?

[MJegorovas]

If you're using submitFormWithBinaryData method to build request you'll need to print your List<PartData> content before passing it to that method. I don't have any other thought at the moment.