Tabrisjs Cannot establish connection package.json file

Question

I followed the tabrisjs tutorial instructions to the letter when I get to this part

In the URL tab of the developer app, enter:

http://(development-machine-ip-address):8080/

I do as it instructs and I get the following error

Could not establish connection

Could not open file: http://(ipaddress):8080/package.json

How do I go about figuring out why it cannot find the file?

I am on the same network as my development laptop with the android device , so that shouldn't be the problem.

here is the link:

https://tabrisjs.com/documentation/0.9/getting-started

Have you started the http-server inside the directory of the example? Can you open the package.json URL in you browser (just for testing)? — Jonek, Mar 29 '15 at 18:08

score 3 · Accepted Answer · answered Apr 07 '15 at 12:55

Open a browser on the device and point it to the package.json URL the developer client complains about (http://(ipaddress):8080/package.json). If the browser can open the file, but the developer client still complains, then this is a bug and should be reported in the tabris.js issue tracker. If the browser cannot open this file, the problem is on the server side.

One common reason is that http-server has been started in another directory.

Another common problem is that there is already a server running on port 8080. In this case, http-server would open on the next available port, e.g. 8081.

score 1 · Answer 2 · answered Feb 24 '17 at 04:51

In my case I found that this was down to my firewall, AVG, blocking the connection attempt. The solution

From Menu->Settings->Components choose Firewall
Choose Network profiles
For your current network adaptor change the profile to private (you have to establish whether this is a safe thing to do)
Back on the Policies page check Allow all connections with friends in private mode

With other firewall software you will have to find out just how you allow access to that port from other devices on the same network

score 0 · Answer 3 · answered Jun 09 '16 at 23:23

This is a bit old but, for anyone else who runs into the problem, I was able to fix it on Android M (S7Edge) by exiting the server (CTRL+C) then force stopping the developer app and removing all its data. After restarting the app and the server, everything worked fine.

I seemed to have caused the problem by trying to connect while the server was running in a directory which did not have a Tabris application. I accidentally miss-typed the directory name on the CD command and didn't notice until I started trying to figure out why it wasn't working.

After stopping the server and restarting it in the correct directory, the file could be opened from a web browser but the developer app still seemed to be using the old (incorrect) location. This issue persisted even after rebooting the computer.

Tabrisjs Cannot establish connection package.json file

3 Answers3