topic Problem with Javascript&colon; Palette.sendInfoToHTML returns no response in Fusion API and Scripts Forum

Problem with Javascript: Palette.sendInfoToHTML returns no response

j.han97 — Wed, 05 Jan 2022 08:47:15 GMT

Hi all,

I am developing a palette recently and it worked fine until just now. The Javascript suddenly just refused to return anything.

To identify the problem, I have created a sample to replicate this problem. With a simple palette that connects to a HTML with only "Hello World" as plain text, this script then sends a simple 'hi' message to the HTML.

However, the same error persists and show 'response empty' message.

I am not experienced in Javascript, hence have no idea how to debug this problem. I have restarted Fusion 360 as well, but no help in this issue.

Thank you in advance for your kind help.

Re: Problem with Javascript: Palette.sendInfoToHTML returns no response

j.han97 — Wed, 05 Jan 2022 09:30:18 GMT

Ok, now I think the Fusion 360 on my computer is broken. When I ran this script:

import adsk.core, adsk.fusion, adsk.cam, traceback _app = adsk.core.Application.get() _ui = _app.userInterface def run(context): try: _ui.messageBox('Hello world') except: if _ui: _ui.messageBox('Failed:\n{}'.format(traceback.format_exc())) def stop(context): if _ui: _ui.messageBox('Bye bye world')

The 'Hello world' dialog popped out first, then followed by 'Bye bye world' immediately. Seems like Fusion 360 is rushing from run() to stop() recklessly. I will re-install and see if the problem goes away.

Re: Problem with Javascript: Palette.sendInfoToHTML returns no response

j.han97 — Wed, 05 Jan 2022 10:13:15 GMT

After a clean re-install, Fusion 360 is working normally now. (Although I don't know if it will snap again someday)

As a side note, I am experiencing some connectivity issues to Autodesk servers (pure speculation), so the problem might be rooting from there (pure speculation).

Anyway, the problem is gone for now, so I will mark this post as solved.

Re: Problem with Javascript: Palette.sendInfoToHTML returns no response

kandennti — Wed, 05 Jan 2022 14:30:51 GMT

Hi @j.han97 .

When sending data from python to Html, it is useful to set it with json.dumps against HTMLEventArgs.returnData property.

https://help.autodesk.com/view/fusion360/ENU/?guid=GUID-DC2A4AB7-6A24-4A28-87A0-9952A0ABDF74

I also have very little experience with JavaScript, but I learned it from @thomasa88 and @JeromeBriot.

https://forums.autodesk.com/t5/fusion-360-api-and-scripts/i-want-to-set-the-initial-values-for-the-palette-display/m-p/10610275

And I was able to publish this one.

https://github.com/kantoku-code/Fusion360_PerspectiveAngleController

Re: Problem with Javascript: Palette.sendInfoToHTML returns no response

j.han97 — Wed, 05 Jan 2022 15:26:42 GMT

Thank you @kandennti for the useful information. I definitely need them to make my code more robust.

Besides that, the developer mode mentioned in your post sounds very interesting to me. Since the html is implemented in Fusion 360 (kind of indirect), plus I am not very familiar with Javascript, it is extremely frustrating for me to debug the script. With the developer tools I expect to develop my script more efficiently.

Re: Problem with Javascript: Palette.sendInfoToHTML returns no response

j.han97 — Thu, 06 Jan 2022 01:53:03 GMT

Thanks to the tips on the developer tools in Fusion 360, I was able to find the problem. There is a mistyped function at the beginning (variable declaration) of the Javascript, which caused the whole script to fail and not returning everything.

So lesson learnt: If Javascript gives empty response, check the script!!

Re: Problem with Javascript: Palette.sendInfoToHTML returns no response

rishabsain723 — Wed, 12 Jan 2022 07:33:15 GMT

Great! this is helpful, thanks for sharing.