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[WIP ] ImageIO (MultiClient picture)

Marcus Oskarsson requested to merge gh-72e2e218/312/bolmsten/imageIO into master

Created by: bolmsten

In this PR I have changed the way the client fetches the picture from the server.

Before we used "multipart/x-mixed-replace" served by flask as described by this tutorial:

http://blog.miguelgrinberg.com/post/video-streaming-with-flask

This does not work for multiple clients and as stated in the link above the most efficient ways of sending a picture is by websockets.

Additionally the technology we are using is also slowly losing support:

https://bugs.chromium.org/p/chromium/issues/detail?id=249132

The problem I have encountered is that FireFox seems to handle the new approach quite badly and this is the reason I keep this as WIP.

(Chrome works great no matter how many clients attached)

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