CNNのワンボクシングの失敗

tgxworld · 2024 年 5 月 8 日午前 5:33

これは、以下のリンクで修正されました。

github.com/discourse/discourse

FIX: Attempt to onebox even if response body exceeds `max_download_kb`

main ← fix_dont_throw_away_response_body_when_max_download_exceeded

opened 05:28AM - 08 May 24 UTC

tgxworld

+45 -4

In 95a82d608d6377faf68a0e2c5d9640b043557852, we lowered the default for `Onebox….options.max_download_kb` from 10mb to 2mb for security hardening purposes. However, this resulted in multiple bug reports where seemingly nomral URLs stopped being oneboxed. It turns out that lowering `Onebox.options.max_download_kb` resulted in `Onebox::Helpers::DownloadTooLarge` being raised more often for more URLs in `Onebox::Helpers.fetch_response` which `Onebox::Helpers.fetch_html_doc` relies on. When `Onebox::Helpers::DownloadTooLarge` is raised in `Onebox::Helpers.fetch_response`, we throw away whatever response body which we have already downloaded at that point. This is not ideal because Nokogiri can parse incomplete HTML documents and there is a really high chance that the incomplete HTML document contains the information which we need for generating a reasonable onebox. Therefore, this commit updates `Onebox::Helpers.fetch_html_doc` to not throw away the response body when the size of the response body exceeds `Onebox.options.max_download_size`. Instead, we just take whatever we have and get Nokogiri to parse it.

ローカル環境では、このトピックで報告された「問題のある」URLは、ワンボックスを試みた際にエラーが表示されなくなりました。

トピック		返信	表示
Issue with Onebox not working for videos larger than 5MB Support	0	35	2025 年 12 月 20 日
Oneboxing large images fails with no visual cue Bug onebox	47	1571	2023 年 5 月 4 日
Onebox links result in large image downloads Feature	2	474	2022 年 12 月 14 日
Can't override size of image oneboxes Feature	3	809	2017 年 6 月 18 日
Onebox issue with a specific site Support onebox	14	1634	2019 年 3 月 2 日

CNNのワンボクシングの失敗

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