Provides a Formatting Flow which could be used to format a MultipartFormData.Part source to a multipart/form data body
Creates a new random number of the given length and base64 encodes it (using a custom "safe" alphabet).
Creates a new random number of the given length and base64 encodes it (using a custom "safe" alphabet).
IllegalArgumentException
if the length is greater than 70 or less than 1 as specified in
rfc2046
Transforms a Source[MultipartFormData.Part]
to a Source[ByteString]