ESP8266 Community Forum

martinayotte wrote:You're right !
I've decided to try it out myself, and effectively, the onFileUpload handler doesn't show any args.
I don't know if ESP8266WebServer could be modified easily to support that during onFileUpload.

No biggie. I just wanted to be sure I wasn't missing something. I can make up for it with the javascript and just re-write the action tag on submit.

Ok ! Yes, there are many ways to workaround ...
I think the issue is that parser is parsing only the first boundary of multipart and ignore others.
This also means that we can't have multiple files uploads.