Why would you want to use XML for that? XML imposes quite a lot of restrictions on the content, such as for example, it may not contain certain bytes or byte sequences, whilst these restrictions may not necessarily apply to the files you want to transfer. Generally there are three ways of sending files from flash: using FileReference (or FileReferenceList), using NetConnection or using Socket. The choice depends on what in particular you are trying to achieve. Filereference resembles the API you have in HTML with few differences regarding what headers you may send and having an option to monitor the upload process. NetConnection may send even fewer headers, on the other hand it may allow you for somewhat better control of the data transfer (you may send it in chunks and backup parts of it if needed). Socket would allow you to implement other transfer protocol based on TCP, such as FTP for example.
Best. Oleg
