# Onebox (deprecated) gem question on allowed domains & settings
**URL:** https://meta.discourse.org/t/onebox-deprecated-gem-question-on-allowed-domains-settings/310589
**Category:** Development
**Created:** [June 5, 2024, 3:10am UTC](https://meta.discourse.org/t/onebox-deprecated-gem-question-on-allowed-domains-settings/310589 "2024-06-05T03:10:24Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@fearlessfrog](https://meta.discourse.org/u/fearlessfrog)
#### Post date: [June 5, 2024, 3:10am UTC](https://meta.discourse.org/t/onebox-deprecated-gem-question-on-allowed-domains-settings/310589/1 "2024-06-05T03:10:24Z")
I was playing with the old onebox gem here [discourse/onebox: (DEPRECATED) A gem for turning URLs into website previews (github.com)](https://github.com/discourse/onebox) (I see it is deprecated, just trying to understand it a bit more) and couldn’t see how to set up options for it. I think there is a cache: value to set but didn’t see anything else.
When I use it with this
```ruby
url = 'https://meta.discourse.org/t/upgrading-v2-2-0-beta4-
forum-with-unknown-local-changes/310241'
Onebox.preview(url).to_s
```
..it works fine, gives a onebox. When I use it with an og site like this:
```ruby
url = 'https://bonnieplants.com/blogs/garden-fundamentals/v
egetable-garden-care-tips'
Onebox.preview(url).to_s
```
..it doesn’t, e.g. returns empty.
The same links in Discourse onebox ok of course. I suspect there is some sort of AllowedDomainsList regex (?) that opens it up via config and was wondering how I could use that with this gem? Can I pass that option somehow, or use it as an engine some how? I am hunting around the specs but think I am missing it.
Appreciate any insights, even if this is a deprecated gem. Thanks! ❤
---
### Author:  [@fearlessfrog](https://meta.discourse.org/u/fearlessfrog)
#### Post date: [June 5, 2024, 9:49pm UTC](https://meta.discourse.org/t/onebox-deprecated-gem-question-on-allowed-domains-settings/310589/2 "2024-06-05T21:49:22Z")
I was being lazy, but stepping through the code the old onebox can allow this with using the allowed\_domains on the generic onebox e.g.
```ruby
Onebox::Engine::AllowlistedGenericOnebox.allowed_domains << hostname
preview = Onebox.preview(url, onebox_options).to_s
```
---
### Author:  [@system](https://meta.discourse.org/u/system)
#### Post date: [July 5, 2024, 9:49pm UTC](https://meta.discourse.org/t/onebox-deprecated-gem-question-on-allowed-domains-settings/310589/3 "2024-07-05T21:49:53Z")
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