Problems when importing settings from the link

[Alex-302]

Please answer the following questions for yourself before submitting an issue

• [x] Filters were updated before reproducing an issue
• [x] I checked the knowledge base and found no answer
• [x] I checked to make sure that this issue has not already been filed

AdGuard version

7.21 n13

Issue Details

Steps to reproduce:

1. Go to https://github.com/AdguardTeam/AdguardFilters/issues/199639
2. Try to import settings by clicking Import button under the table

Expected Behavior

Settings imported.

Actual Behavior

Nothing.

It is caused by:

• parameters without values - importation always fails. For example:

  &dns.filters=
  &dns.custom_bootstrap=
  &dns.custom_fallback=
  

• length of URL. Original length in https://github.com/AdguardTeam/AdguardFilters/issues/199639 - 2561 - not works; Without "parameters without values" - 2518 - not works; Without "parameters without values" and trimmed to 2030 symbols - works. So, mostly configurations that are close to the default values are successfully imported.

[Alex-302]

• https://github.com/AdguardTeam/AdguardFilters/issues/199909

Fails due to limit of URL with the settings = 2064 symbols. No problems with AdGuard for Mac.

[Sergey-Lyapin]

https://github.com/AdguardTeam/AdguardFilters/issues/199795 import button doesn't work with AG for Windows

[Alex-302]

https://github.com/AdguardTeam/AdguardFilters/issues/200723 https://github.com/AdguardTeam/AdguardFilters/issues/200752 Fails due to limit of URL with the settings