Tips for using c9.io

[rocketinventor]

Hi, I was able to get the python code for c9 working but it auto-opens in lynx and I cannot figure out how to play the demo. Any tips?

[macfergus]

Hi, the problem is that the html and javascript are served as local file:// URLs. So you can't access them over the network. We should serve them through the web server to fix this.

To do this, we need to configure the flask static_folder to point to a path containing demoBot.html jgboard-latest.js and board.js. Then update the postMove URL to be relative instead of absolute.

PS. @rocketinventor, if you are interested in contributing to betago this would be a really useful and straightforward place to start :)

[rocketinventor]

I'm still working on getting flask to serve the files statically. My current efforts are not working though. It looks something like this and is based in part on this guide b/c I didn't understand this one. Workspace url: https://ide.c9.io/rocketinventor/beta-go

The postMove URL part is done, though, I'll push it out when I get the flask server running.

P.s. @macfergus Thanks for helping me get started 👍

[macfergus]

Your diff looks good, I think the only thing you're missing is to change app = Flask(__name__) to app = Flask(__name__, static_folder='../ui') or something like that. All the calls to send_static_file and such are relative to static_folder.

Thanks for tackling this!

[rocketinventor]

After several moths of inactivity, I finally noticed that the C9 IDE documentation says explicitly that you can only use ports 8080 - 8082.

I'm going to take another look to see if that was my problem.

[maxpumperla]

Great to hear! Let me know if it solved your problem. Haven't had time to work on betago for a very long time either...

[rocketinventor]

@maxpumperla No luck so far. I don't think this is a c9 issue, right now because I can't get it to work in curl, either. I tried running betago according to the instructions, then I tried running the following in bash:

rocketinventor:~/workspace/betago (master) $ curl 0.0.0.0:8081/prediction                                                                                 
curl: (7) Failed to connect to 0.0.0.0 port 8081: Connection refused
rocketinventor:~/workspace/betago (master) $ curl 0.0.0.0:5000/prediction
curl: (7) Failed to connect to 0.0.0.0 port 5000: Connection refused
rocketinventor:~/workspace/betago (master) $ curl localhost:5000/prediction
curl: (7) Failed to connect to localhost port 5000: Connection refused

Here is the traceback from flask (change the ext to .html)

Traceback (most recent call last):
  File "/home/ubuntu/workspace/.betago/lib/python2.7/site-packages/flask/app.py", line 1836, in __call__
    return self.wsgi_app(environ, start_response)
  File "/home/ubuntu/workspace/.betago/lib/python2.7/site-packages/flask/app.py", line 1820, in wsgi_app
    response = self.make_response(self.handle_exception(e))
  File "/home/ubuntu/workspace/.betago/lib/python2.7/site-packages/flask_cors/extension.py", line 188, in wrapped_function
    return cors_after_request(app.make_response(f(*args, **kwargs)))
  File "/home/ubuntu/workspace/.betago/lib/python2.7/site-packages/flask/app.py", line 1403, in handle_exception
    reraise(exc_type, exc_value, tb)
  File "/home/ubuntu/workspace/.betago/lib/python2.7/site-packages/flask/app.py", line 1817, in wsgi_app
    response = self.full_dispatch_request()
  File "/home/ubuntu/workspace/.betago/lib/python2.7/site-packages/flask/app.py", line 1477, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "/home/ubuntu/workspace/.betago/lib/python2.7/site-packages/flask_cors/extension.py", line 188, in wrapped_function
    return cors_after_request(app.make_response(f(*args, **kwargs)))
  File "/home/ubuntu/workspace/.betago/lib/python2.7/site-packages/flask/app.py", line 1381, in handle_user_exception
    reraise(exc_type, exc_value, tb)
  File "/home/ubuntu/workspace/.betago/lib/python2.7/site-packages/flask/app.py", line 1475, in full_dispatch_request
    rv = self.dispatch_request()
  File "/home/ubuntu/workspace/.betago/lib/python2.7/site-packages/flask/app.py", line 1461, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "/home/ubuntu/workspace/betago/betago/model.py", line 49, in next_move
    row = content['i']
TypeError: 'NoneType' object has no attribute '__getitem__'

Files: https://c9.io/rocketinventor/beta-go/files/betago

[rocketinventor]

@maxpumperla Everything works now! Please merge #28 so that others can benefit as well.

[rocketinventor]

28 also contains a bash script that makes running the demo easier. Soon, it will be super simple to run anywhere (especially c9.io).