Onebox can not show preview for url with og metadatas


I’ve managed setup a discourse instance with discourse_docker, with version 2.7.0.beta4.

I’m facing a curious problem that with the same url it did generated onebox preview, however it fails several days later.

the url in problem is Dapr可视化指南-InfoQ

The error prints as below.


But I can find “og:description” and “og:image” in this url meta tags.

I’m not familiar with discourse code, any help will be appreciated, thanks!

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finally I found that is an issue of my environment, I use an SNAT proxy and the some 1 outer IP of the proxy IP pool was blocked by the service provider.


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