StreamCryptoStateBodyContent
internal class StreamCryptoStateBodyContent(fileContentStream: () -> Source, fileSize: Long) : OutgoingContent.WriteChannelContent
Custom OutgoingContent implementation to stream the crypto state backup as multipart/form-data without loading it all into memory. The content is structured as follows: --boundary Content-Disposition: form-data; name="file"; filename="CHANGELOG.zip" Content-Type: application/octet-stream Content-Length: