Flex上传器和有关flex的详细信息

I making an uploader for 3rd party site, I don't want upload through my host (user upload to host, host upload to 3rd party site), it waste bandwidth so I decided choose flex, but I want know clearly about flex before I tried with it, can it handle http response after upload (redirect header, html response, json ...)I making an uploader for 3rd party site, I don'