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Hey!
Can I use Ktor client to upload a file as a single binary file instead of using multipart?
I have the need to upload a file to aws s3 and it doesn’t work as expected with a single-part multipart, but testing from Postman using “binary” works. Would there be any way to do that?
Also, I can’t use `submitFormWithBinaryData` because AWS S3 expects a `PUT` and not a `POST`

You can use the `setBody` method to send a binary body. Here is an example:
```val client = HttpClient(OkHttp)

val r = <http://client.post|client.post>("<https://httpbin.org/post>") {
    setBody(File("data.bin").readChannel())
}
println(r.bodyAsText())```

Waaay easier than expected. Thanks, mate.

For future reference, I had to also set the Content-Type manually (not able to use ByteChannel here).