Problem parsing package & OTA Update Failure: 400

[Braxwell]

Hi !
I have some problems implementing OTA update. I don't think it's a problem of link or file because I can manually install the app by downloading it.
When I try to update my app (using the same code as the example you gave), this happens (permissions have been granted) :

D/FLUTTER OTA( 5335): OTA UPDATE ON LISTEN
D/FLUTTER OTA( 5335): OTA UPDATE ON STARTING DOWNLOAD
D/FLUTTER OTA( 5335): OTA UPDATE DOWNLOAD STARTED 4479
D/FLUTTER OTA( 5335): OTA UPDATE TRACK DOWNLOAD STARTED 4479
D/FLUTTER OTA( 5335): OTA UPDATE TRACK DOWNLOAD THREAD STARTED 4479
D/FLUTTER OTA( 5335): OTA UPDATE PENDING
D/FLUTTER OTA( 5335): OTA UPDATE FAILURE: 400

And then I have the "There was a problem parsing the package." message on the screen. When I go to my download folder, there is no apk file. I tested with and without checksum, and with it I have the same results, minus the message on screen.
If it can help, I'm using a Xiaomi Mi A2 (Android 10) for my tests.

Thank you !

[MartinHlavna]

That number is just error reason provided from Android download manager. According to documentation it will hold either ERROR_ constant or HTTP status code. All ERROR constant are above 1000 so it looks like your server responded with HTTP 400 status.

Could you see error logs on your server? Maybe that server requires some headers.

[Braxwell]

After some tests, It seems that my requests don't even reach the server. I switched my link for the one showed in the example and it worked perfectly.
In this application, I send another request for the same server (to a .php file) and it's working, so I find this strange. I also tried to download the file from another link (not a private server) and it didn't work.
Is OTA Update blocking non-httpS addresses ?

[MartinHlavna]

Could try to apply this solution? Looks like non-https is blocked by default in download manager.

[Braxwell]

That was it ! Thank you !

[MartinHlavna]

I will add it to readme