About japikas

japikas · ‎03-06-2023

Not fully solved yet. The WebSocket server provides the data over insecure ws connection. It's accepted by browser when loading html/js file from local file system of the developing computer. When the html page is hosted by the go-server in CtrlX Core, it's provided always over secure https connection, and browser does not accept insecure ws anymore, but requires secure connection for WebSocket as well. No the question under investigation is how to do that, and how to bind it with the build-in https server of the Core.

japikas · ‎03-06-2023

It's very useful to ask questions here. First I struggle for days, and after asking I manage to figure out the problem within an hour... 😊 As usual, the problem was in own code. I did some changes after testing on own computer, which caused it not to work properly. Now it's working and case closed. What my App does? Collects data from UDP socket server and USB serial port simultaneously. Synchronizes the data and provides as live-stream over WebSocket. A different snap app implements web server to host a web page to render the data in real-time chart.

japikas · ‎03-06-2023

Hi, My intention is to streaam real-time data to my web UI integrated with the CtrlX Core dashboard. I have an UDP server implemented in Node.js to collect data from external sensor, and web-server cloned from the go.hello sample. I have a Node.js WebSocket server implemented in the same snap application with the UDP server. It's working on my own computer w/o snap. The problem is that I'm unable to allow access to the WebSocket server, even if I know how to enable access to the UDP server. From the log file I can see that the WebSocket server is running, but not accessible. Propably something wrong with my config files. I wonder if there's any example available how to implement WebSocket server, so that I could compare my configurations.

japikas · ‎02-21-2023

Got my problem solved. Had to enable access to the serial port by adding it in snapcraft.yaml file: plugs: [network, serial-port] However, the error message is persistent when building the snap app. To ensure it's not caused by any of my configuration changes, I created a new App Build Environment (1.18.2) and only installed sdk (1.18.0) and snapcraft with the scripts included. The error message is as stated above. My snap app source is copy of the hello-world Node sample, with only src/app.ts, package.json and snap/snapcraft files modified accoringly.

japikas · ‎02-20-2023

Missing piece of information: I'm building in App Build Environment of WORKS version 1.18.2

About japikas

Re: WebSocket server

Re: WebSocket server

WebSocket server

Re: Accessing USB serial port with Node application / snap build fails

Re: Accessing USB serial port with Node application / snap build fails