Hi, I am trying to process a multipart/form-data upload in a streaming manner. We are using camel-servlet and camel-rest (2.17.0) to route REST paths to Spring beans for processing the request. However, with anything that I have tried, I only get to the Spring bean after the entire request has been recieved, including the entire multipart message.
I would like to be able to process the uploaded file without it being temporarily stored in memory or on disk as our application will need to be able to process very large uploads simultaneously. I can accomplish this when implementing a HttpRequestServlet and using Apache's commons-fileupload (https://commons.apache.org/proper/commons-fileupload/streaming.html), but I'm having less luck when using Camel to route REST paths to our beans. We define our rest paths like so: rest("upload") .post() .route() .bean(UploadHandler.class, "handleUpload"); Explicitly adding noStreamCaching() to the route doesn't seem to change anything (which makes sense, given that the default behaviour as of Camel 2.0 is not to cache streams). Some of the options i've tried: * Not using camel-rest, but directly route from camel-servlet * Not using .bean, but .to * Using .process * Using camel-jetty But each attempt had the same effect; the entire request had to be received (and presumably processed by Camel into an Exchange object) before I could start processing it in my bean. Is it possible to use Camel to route an HTTP POST request to a Spring bean in such a way that I can the process it in a streaming manner? And if so, how? Any help is greatly appreciated. Kind regards, Jonas Koperdraat
