Takios/download-with-kget

Error at sending native message: Full error message: Error: Attempt to postMessage on disconnected port

Closed this issue · 10 comments

proatgram commented

Like the title says, I am getting that error notification whenever I try to download with KGet.
Unlike the other issue, I have already installed the native application.

Specs:

            .-/+oossssoo+/-.               thetimbrick@compuber 
        `:+ssssssssssssssssss+:`           -------------------- 
      -+ssssssssssssssssssyyssss+-         OS: Ubuntu 22.10 x86_64 
    .ossssssssssssssssssdMMMNysssso.       Host: 20J9S0M400 ThinkPad L570 
   /ssssssssssshdmmNNmmyNMMMMhssssss/      Kernel: 5.19.0-23-generic 
  +ssssssssshmydMMMMMMMNddddyssssssss+     Uptime: 1 day, 4 hours, 53 mins 
 /sssssssshNMMMyhhyyyyhmNMMMNhssssssss/    Packages: 4326 (dpkg), 6 (flatpak) 
.ssssssssdMMMNhsssssssssshNMMMdssssssss.   Shell: bash 5.2.2 
+sssshhhyNMMNyssssssssssssyNMMMysssssss+   Resolution: 1366x768 
ossyNMMMNyMMhsssssssssssssshmmmhssssssso   DE: Plasma 5.26.2 
ossyNMMMNyMMhsssssssssssssshmmmhssssssso   WM: kwin 
+sssshhhyNMMNyssssssssssssyNMMMysssssss+   WM Theme: Klassy 
.ssssssssdMMMNhsssssssssshNMMMdssssssss.   Theme: [Plasma], Breeze [GTK3] 
 /sssssssshNMMMyhhyyyyhdNMMMNhssssssss/    Icons: Fluent [Plasma], Fluent [GTK2/3] 
  +sssssssssdmydMMMMMMMMddddyssssssss+     Terminal: konsole 
   /ssssssssssshdmNNNNmyNMMMMhssssss/      CPU: Intel i5-7200U (4) @ 3.100GHz 
    .ossssssssssssssssssdMMMNysssso.       GPU: Intel HD Graphics 620 
      -+sssssssssssssssssyyyssss+-         Memory: 4141MiB / 7840MiB 

Mozilla Firefox 106.0.2 ( Debian Package, not snap)
kget 22.08.2
Takios commented

I'm currently unable to reproduce the issue. You might be missing one of the dependencies for the native application:

  • python3-pydbus
  • python3-json
  • python3-construct

The exact package names might be different on Ubuntu.

proatgram commented

I installed everything except Python3-json, that might be the problem as I thought I already had it installed

If I were to run the python script manually would I get an error about a missing package?

Takios commented

You can try the script manually with echo "Insert any URL here" | /usr/lib64/mozilla/native-messaging-hosts/download_with_kget.py. If a package/module is missing, then it should complain about it, yes.

proatgram commented

When invoked manually I get the following output:

Traceback (most recent call last):
  File "/usr/lib64/mozilla/native-messaging-hosts/download_with_kget.py", line 42, in <module>
    message = get_message()
  File "/usr/lib64/mozilla/native-messaging-hosts/download_with_kget.py", line 16, in get_message
    return json.loads(message_content)
  File "/usr/lib/python3.10/json/__init__.py", line 346, in loads
    return _default_decoder.decode(s)
  File "/usr/lib/python3.10/json/decoder.py", line 337, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "/usr/lib/python3.10/json/decoder.py", line 355, in raw_decode
    raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)
Takios commented

Ah my mistake, the echo method is expected not to work (it's been a few years since I've had a look at this, I forgot :D )

Anyway I was able to reproduce the issue now and am working on resolving it.

Takios commented

I have some good news and some bad news.

The good news is, that I was able to fix this particular issue with the 086d075 commit.

However, the .deb based Firefox install now fails the native message with an "Unexpected error". I have not been able to find the cause or a workaround for this.

I am inclined to say this is an issue with the .deb, because I've also been unable to get other extensions that rely on native messaging to work, like "KeepassXC-Browser" or "Plasma Integration".

According to https://discourse.ubuntu.com/t/call-for-testing-native-messaging-support-in-the-firefox-snap/29759 the snap-based Firefox on Ubuntu now has Native Messaging support in its beta branch (sudo snap install firefox --beta) and those addons, including download-with-kget, work there.

proatgram commented

The issue is indeed resolved for me with this commit, though the issue you are having now I am not having and KGet opens with the download link ready to go. Is the installation failing with the addon?

Takios commented

That's interesting, maybe I made a mistake. I'll reinstall my Ubuntu VM and try again.
You are using the Firefox .deb provided by the mozillateam PPA, right?

proatgram commented

That is correct

Takios commented

Welp, it still occurs for me after a reinstall. I'll still close this issue now because the original issue is fixed, the follow-up issue doesn't appear on my main system and you're not affected by the follow-up issue on your system either, so it might be something wrong with my VM setup.