facebook - 重定向并保留我的图标

Question

我想知道当你点击 facebook 上的链接时，facebook redirects 是如何保持它的 favicon 的，它的打开的新标签带有 FB favicon

我想知道这是怎么实现的

它不是 iframe 所以我怎么能这样做

我应该从哪里开始？虽然重定向有一个 URL 叫做 maybe it does everything

问候

Answer 1

您使用的是谷歌浏览器吗？我很确定你指的是一个已知的错误。参见 this bug合并到this bug .

What steps will reproduce the problem?

1. Visit site with /favicon.ico (e.g. facebook.com)
2. Receive a redirect from this domain to a new domain without a /favicon.ico
3. The favicon for the new url is inherited from the last domain.

What is the expected result?

Favicon is blank.

What happens instead?

Favicon is inherited from last domain.

Other information:

I discovered this as facebook.com does not link directly to external sites, but logs the url then redirects to it. I reproduced the issue on localhost using the 'redirect' statement in the ruby web-framework 'Sinatra'.