A quick mobile-to-desktop share capability, through matrix barcode
License: Apache License 2.0
Cool Maze is a quick mobile-to-desktop share app, through matrix barcode.
This repo contains (open source):
This repo does not contain (closed source):
This repo does not contain (open source):
The Issue tracker welcomes bugs of all components of Cool Maze.
![dependabot[bot] avatar](https://avatars.githubusercontent.com/in/29110?v=4 "dependabot[bot]")
The app is not really designed to be opened as standalone, it is rather part of an "intent" process (Share with...).
Currently launching the app displays an ugly blank screen.
Design an onboarding to explain the concept and invite user to open webpage on desktop computer.
Toolbar icon : click it to display QR and listen to push service.
Not much more than the webpage coolmaze.net, but handy.
Don't even try complex HTTP requests and use cases when internet is OFF.
It currently only features an obscure, unusable QR-code.
Keep it sober and minimalist, but explain :
E.g. when you wake computer after suspend.
Detect it and recreate connection.
If necessary, change the chanID and the QR-code.
"Loading requests" on GAE are bad.
On Android activity start, send a background request to https://cool-maze.appspot.com/wakeup
On webpage load, send a background request to https://cool-maze.appspot.com/wakeup
Report that something went wrong, instead of keeping spinning.
Try to require as few permissions as possible. This one may be used during scanning, but hopefully we can manage to get along without it.
This example looks nice https://en.wikipedia.org/wiki/QR_code#Variants
From Picasa app, sharing a 14MB MP4 video ended up in a 40MB MPG video.
It didn't play directly in browser (Safari), instead it was downloaded to fs.
Two use cases :
Between 2 and 5 chars should do the job.
Find a hashing technique to make a Target ID difficult to guess.
All endpoints of cool-maze.appspot.com should refuse HTTP
Emit a mail alert otherwise. This may detect a bug or an security leak. Or even block the transfer?
This would reduce 2 security risks
Would be useful.
Toolbar icon : click it to display QR and listen to push service.
Not much more than the webpage coolmaze.net, but handy.
/dispatch is called, with unexpected values.
Sometimes a photo shared from Whatsapp is uploaded as image/* ... and then the browser doesn't know how to display it directly (offers a raw file download instead).
The scan works fine, but the sentence is at the correct place for the Portrait use, which is currently the only recommended orientation for Cool Maze app.
Related to issue #19
State somewhere that URLs are short-lived, uploaded files won't be retained, blah blah blah
Maybe Google Analytics will be enough, or maybe not.
Interesting metrics would be
For example pusher.com
E.g. "Try to send this puppy to coolmaze.net !"
Current impl (a small textarea below the QR-code) doesn't look good enough.
The goal is to secure the Target ID : it should be unique.
Or find a way with Pusher (listener count, etc.).
How many ms between "Share with ... Cool Maze" and QR-code successful reading, in optimal conditions (when phone already facing the QR-code at appropriate distance) ?
Typical computer user (sitting 50cm in front of screen) must step back with phone in order to scan the QR-code.
By default, display a smaller (medium-size) QR-code.
Add an option to display full-size, e.g. for video projectors.
Keep all files in GCS.
Keep a mapping of Hash -> GCS File in Datastore and Memcache.
Make sure the mobile calculates the hash before uploading.
In case the hash is known, serve directly a fresh GET URL to the existing GCS object.
Note that it is almost the contrary of issue #31. A compromise would be to keep the files and mappings, but no more than 3 days.
This would let us take appropriate measures to mitigate the attack : invalidate current sessions, raise the complexity of the chanIDs ...
The file transfer must be :
E.g. a blue or orange circle?
Display some kind of progress bar after the scanning, on the [Uploading...] screen.
http://coolmaze.io
http://coolmaze.net
Should immediately redirect to HTTPS counterpart
The upload doesn't need the result of the scan.
The scan intent doesn't need the upload to be completed.
Make the two in parallel. Wait for the two completions before notifying the uploaded file GET URL (the what) to the target desktop browser (the whom).
Should clearly state :
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