"How did you do that?" It's surprisingly easy to do once you understand the concepts involved. There are four ways to get binary data from the Flex application back to your server: AMF3 (RemoteObject), Web Services, HTTP Services, or through a Socket connection. In this article I'll cover the first three topics as they pertain to Flex 2; Socket connectivity could take an article all by itself.
Binary data can't be pushed to the server in its native format using a Web Service or a standard HTTP POST method. To save the data using Web Services or HTTP POST, you must first convert the binary data to a text string using Base64-encoding. On the other hand, AMF3 (RemoteObject method) lets you send the binary data to the server in its native binary form. One thing to keep in mind with Base64-encoding is that the encoding process will actually increase the size of the data that's being sent across the wire.
