Add configurable CORS allowed origins

[facchinm]

@mastrolinux

[ArduinoBot]

✅ Build completed.

Download at http://downloads.arduino.cc/CreateBridge/CreateBridge-PR35.zip

[mastrolinux]

@matteosuppo please test this one.

[matteosuppo]

It's not working for me:

[msuppo@summer linux_amd64]$ ./Arduino_Create_Bridge 
INFO[0000] Version:1.0.0-dev-d762844                    
INFO[0000] Hostname: summer                             
INFO[0000] Garbage collection is on using Standard mode, meaning we just let Golang determine when to garbage collect. 
INFO[0000] You specified a serial port regular expression filter: usb|acm|com

INFO[0000] Your serial ports:                           
INFO[0000]  There are no serial ports to list.          
[GIN-debug] [WARNING] Running in "debug" mode. Switch to "release" mode in production.
 - using env:   export GIN_MODE=release
 - using code:  gin.SetMode(gin.ReleaseMode)

[GIN-debug] GET   /                         --> main.homeHandler (2 handlers)
[GIN-debug] POST  /upload                   --> main.uploadHandler (2 handlers)
[GIN-debug] GET   /socket.io/               --> main.*WsServer.ServeHTTP·fm (2 handlers)
[GIN-debug] POST  /socket.io/               --> main.*WsServer.ServeHTTP·fm (2 handlers)
[GIN-debug] WS    /socket.io/               --> main.*WsServer.ServeHTTP·fm (2 handlers)
[GIN-debug] WSS   /socket.io/               --> main.*WsServer.ServeHTTP·fm (2 handlers)
[GIN-debug] GET   /info                     --> main.infoHandler (2 handlers)
INFO[0000] Inside run of serialhub                      
[GIN-debug] Listening and serving HTTPS on :8991
[GIN-debug] Listening and serving HTTP on :8991
[GIN-debug] [ERROR] listen tcp :8991: bind: address already in use
INFO[0000] Error trying to bind to port: listen tcp :8991: bind: address already in use, so exiting... 
[GIN-debug] Listening and serving HTTPS on :8992

(Arduino_Create_Bridge:8435): Gdk-CRITICAL **: gdk_window_thaw_toplevel_updates: assertion 'window->update_and_descendants_freeze_count > 0' failed
http: TLS handshake error from [::1]:55206: tls: first record does not look like a TLS handshake

On localhost:8991 I get:

WebSocket connection to 'ws://localhost:8991/socket.io/?EIO=3&transport=websocket&sid=7x4MkfeheI6UWoKgj-0X' failed: Error during WebSocket handshake: Unexpected response code: 200

On http://webide.arduino.cc:8080/ide/#/home I get:

XMLHttpRequest cannot load http://localhost:8991/info. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://webide.arduino.cc:8080' is therefore not allowed access.
(index):1 XMLHttpRequest cannot load http://localhost:8992/info. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://webide.arduino.cc:8080' is therefore not allowed access.

This is the content of the config.ini:

configUpdateInterval = 0  # Update interval for re-reading config file set via -config flag. Zero disables config file re-reading.
gc = std  # Type of garbage collection. std = Normal garbage collection allowing system to decide (this has been known to cause a stop the world in the middle of a CNC job which can cause lost responses from the CNC controller and thus stalled jobs. use max instead to solve.), off = let memory grow unbounded (you have to send in the gc command manually to garbage collect or you will run out of RAM eventually), max = Force garbage collection on each recv or send on a serial port (this minimizes stop the world events and thus lost serial responses, but increases CPU usage)
hostname = unknown-hostname  # Override the hostname we get from the OS
ls = false  # launch self 5 seconds later
regex = usb|acm|com  # Regular expression to filter serial port list
v = true  # show debug logging
appName = CreateBridge
updateUrl = http://downloads.arduino.cc/
#updateUrl = http://localhost/
origins = http://webide.arduino.cc:8080

How can I help?