Web interface not supporting color calibration via Kodi

[Nears]

• I confirm that this is an issue rather than a question.

Bug report

It is not possible to run the color calibration via web-interface. Even if Kodi is running and the right IP address is set the calibration does not find Kodi.

Steps to reproduce

Install Kodi (Version 18.6.) and Hyperion.NG (Version 2.0.0.Alpha 4) (From https://github.com/hyperion-project/hyperion.ng/releases/download/2.0.0-alpha.4/Hyperion-2.0.0-alpha.4-Linux-armv7hf-rpi.deb)

What is expected?

Calibration mode is started and colors can ge calibrated

What is actually happening?

Calibration does not start and times out after some time. User is requested to start manual calibration, but even during this the Color-Picker GUI shows up but the LEDs are not changing theire color. Therefor no calibration is possible.

System

Hyperion Server:

• Build: (HEAD detached at 731b517) (brindosch-80f7da4d/731b517b-1585347672)
• Build time: Mar 28 2020 12:26:15
• Git Remote: https://github.com/hyperion-project/hyperion.ng
• Version: 2.0.0-alpha.4
• UI Lang: auto (BrowserLang: de)
• UI Access: default
• Avail Capt: dispmanx,v4l2,framebuffer,qt

Hyperion Server OS:

• Distribution: Raspbian GNU/Linux 10 (buster)
• Arch: arm
• Kernel: linux (4.19.97-v7l+ (WS: 32))
• Browser: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:75.0) Gecko/20100101 Firefox/75.0

[pattyland]

Did you also activate the web remote in Kodi? I use Alpha 5 and MrMC and the calibration via web interface worked fine

[FransTwisk]

I'm experiencing the same. Pre-filled IP is correct but I can't click "Continue" because it's disabled. Hyperion Alpha 5 & Kodi 18.6 running on the same Raspberry Pi 4 running Raspbian Buster. It also didn't work on my LibreELEC install. This first call actually works, with the prefilled local IP, but returns:

jsonCallback({"error":{"code":-32099,"message":"Bad client permission."},"id":"1","jsonrpc":"2.0"});

This is what shows up in the Kodi debug log:

2020-05-02 11:18:20.089 T:2052059344   DEBUG: CWebServer[8080]: request received for /jsonrpc?callback=jsonCallback&request={"jsonrpc":"2.0","method":"GUI.ShowNotification","params":{"title": "Colour calibration wizard", "message": "Test success - time to proceed!", "image":"info", "displaytime":5000 },"id":"1"}&_=1588411096647

Allow remote control from applications on this system & Allow remote control from applications on other systems are turned on. Username and password are blank. Web remote works fine.

[Nears]

Did you also activate the web remote in Kodi? I use Alpha 5 and MrMC and the calibration via web interface worked fine

Yes its active in Kodi and working, I also use it for remote controll access.

[LichtiMC]

In current release (2.0.0-alpha.7) I have the same problem.
How would I calibrate the colors now?

Thanks...

[m-seker]

I'm experiencing the same. Pre-filled IP is correct but I can't click "Continue" because it's disabled. Hyperion Alpha 5 & Kodi 18.6 running on the same Raspberry Pi 4 running Raspbian Buster. It also didn't work on my LibreELEC install. This first call actually works, with the prefilled local IP, but returns:

jsonCallback({"error":{"code":-32099,"message":"Bad client permission."},"id":"1","jsonrpc":"2.0"});

This is what shows up in the Kodi debug log:

2020-05-02 11:18:20.089 T:2052059344   DEBUG: CWebServer[8080]: request received for /jsonrpc?callback=jsonCallback&request={"jsonrpc":"2.0","method":"GUI.ShowNotification","params":{"title": "Colour calibration wizard", "message": "Test success - time to proceed!", "image":"info", "displaytime":5000 },"id":"1"}&_=1588411096647

Allow remote control from applications on this system & Allow remote control from applications on other systems are turned on. Username and password are blank. Web remote works fine.

1- Did you figure out a way to overcome this issue ? Or did it just disappear with later releases(alpha6 or alpha7) ?

2- Are Raspbian and Kodi working fine on Pi4 ? I tried once and it was painfully slow, then I didn't check any further.

[FransTwisk]

1- Did you figure out a way to overcome this issue ? Or did it just disappear with later releases(alpha6 or alpha7) ?

2- Are Raspbian and Kodi working fine on Pi4 ? I tried once and it was painfully slow, then I didn't check any further.

I did not. I did however switch to an Nvidia Shield, since I really missed not being able to play 4k & HDR content. Kodi works fine on a Pi 4, but no HDR support and no Hyperion support for 4k. I do however have the same issue on Nvidia Shield where Hyperion also can't connect to calibrate through Kodi. But I can now at least play 4k HDR content with ambilight!

[sPOiDar]

Since Kodi Leia non-read-only JSONRPC commands must be sent via POST rather than GET.

EDIT: Oh I see the issue, the existing code attempts to use JSONP, which cannot be POSTed cross-origin, so it's converted to a GET. And since Kodi does not set any access-control headers, regular JSON POST won't work in recent browsers either. So, the approach in #1044 of using the websocket seems like a viable fix, tested and appears functional here.