Why can’t I set the content type on a request? It fails saying the engine should handle the content type header, what does that mean?

You can set

Content-type

if you’re using

OutgoingContent

as body.

Here is my code

private suspend fun doUploadFile(data: ByteReadChannel, uploadUrl: String, contentType: ContentType): Unit =
        http.put(uploadUrl) {
            headers.clear() // Remove default headers for this request
            contentType(contentType)
            body = object : OutgoingContent.WriteChannelContent() {

                override suspend fun writeTo(channel: ByteWriteChannel) {
                    data.copyAndClose(channel)
                }

            }
        }

Could you try something like this?

suspend fun HttpClient.doUploadFile(
        data: ByteReadChannel,
        uploadUrl: String,
        contentType: ContentType
): Unit = put(uploadUrl) {
        body = object : OutgoingContent.WriteChannelContent() {
            override val contentType: ContentType? get() = contentType

            override suspend fun writeTo(channel: ByteWriteChannel) {
                data.copyAndClose(channel)
            }

        }
    }

I see. I’ve been looking a bit more at the

OutgoingContent

file and I saw

ReadChannelContent

, can I use this code instead? What’s the difference?

body = object : OutgoingContent.ReadChannelContent() {
                override fun readFrom() = data
            }

(Adding the contentType to that)

Yes, you can also override

contentType

in any

OutgoingContent

.

How do you chose if you use a

ReadChannelContent

or a

WriteChannelContent

?

ReadChannelContent

obliges you to provide generating channel.

WriteChannelContent

allows you to write content directly.

So if I already have a

ByteReadChannel

I use

ReadChannelContent

, while if I have something else to write like a simple

String

or an

InputStream

I could write it directly using

WriteChannelContent

, am I understanding that correctly?