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nginx 能否实时检测图片链接状态,如果是200就直接显示,非200就请求另外的链接地址再显示

有这样的实现方法吗?
图片存储的位置是一样,就是请求二级域名不一样,第二个地方的存储是备份。
能否可以通过nginx来检测连接状态判断来请求?


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try_files指令,
try_files $uri $uri/ @rewrite;
@rewrite 替换为你的跳转连接.

你是用 nginx+ngx_lua 或者直接使用 openresty 的话,可以使用 lua 来写逻辑,就可以实现复杂的逻辑.


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