i have a site to which i added the required OpenGraph tags to, but is not displaying any Onebox previews. it is passing OpenGraph validation, so i doubt it is a markup issue. (i cannot post a link to the validator, because i am a new user) i can observe on the server end that it is indeed serving pages to the Discourse robot: User-Agent: 'Discourse Forum Onebox v3.3.0.beta1-dev' IP Address: 2602:fd3f:3:204:0:242:ac11:2d but the links just do not show up: [image] Authenticate with GitHub No overview available i considered that the problem could be because we return 505 HTTP Version Not Supported for HEAD requests, based on this thread. so i patched our server to return a perfunctory 200 OK response for the HEAD method: > HEAD / HTTP/1.1 > Host: swiftinit.org > User-Agent: curl/7.81.0 > Accept: */* > < HTTP/1.1 200 OK < host: swiftinit.org < access-control-allow-origin: * < content-length: 0 < content-type: text/html; charset=utf-8 < however, this is still not working.

From what I see, it’s a GET request, and only User-Agent header is passed. Right now, it returns a Bad Request. I don’t think there is a direct way to see the response; I added some debug log directly into the code.

i see, i have reconfigured the site to treat HEAD requests identically to GET requests. the site has a security policy that will return 400 unless the client sends a user agent string that starts with the string "Discourse Forum Onebox" and an Accept-Language: * header. i am able to pass the filter using curl with the following settings: $ curl -v -I --http1.1 \ -A 'Discourse Forum Onebox v3.3.0.beta1-dev' \ -H 'Accept-Language: *' \ https://swiftinit.org -o /dev/null > HEAD / HTTP/1.1 > Host: swiftinit.org > User-Agent: Discourse Forum Onebox v3.3.0.beta1-dev > Accept: */* > Accept-Language: * > ; rel="canonical" < etag: "8898806577480f6f7e5241ff270a9201" < access-control-allow-origin: * < content-length: 18933 < content-type: text/html; charset=utf-8 < is there a way i can see the discourse fetch response?

ah that was it, it had a filter on the Accept-Language header, which the bot doesn’t send with all requests. thank you so much!

Onebox previews are not working for my site

Product Support

Arkshine February 23, 2024, 2:04am 2

Hi, welcome

Can you check if your server doesn’t block the requests? From what I see, I get 400 as an error code (when I look at the Discourse fetch response)

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Onebox previews are not working for my site

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