Imgur 图片未嵌入，出现 429 错误

[rahim123]

Thanks @Canapin .

Onebox fail with 429 error should still create valid <img> tags

On my Discourse forum users are encouraged to use external image hosting services when possible. The most common is Imgur, which after a while starts rate-limiting the Discourse server with a 429 error. While this is an unsolvable problem with Imgur, Discourse also doesn’t handle it optimally. Currently when Imgur throws a 429 error Discourse interprets it as if it were an invalid image link and it just displays the image URL with <a> tags. But there is nothing preventing individual users from v…