luckyyang
commented
9 years ago seem this issue is done, so close it. I created a wiki for this issue: https://github.com/maodouio/meteor-lean-startup-camp/wiki/%E5%9B%BE%E7%89%87%E5%A6%82%E4%BD%95%E7%BC%93%E5%AD%98
If you are not using meteor, do it as what you did before, if you are using Meteor, there are many ways. If the picture is stored inside mongodb, you can subscribe it. if the pictures are in S3 ( or some CDN like that), it will be automatically cached by browser unless you disable the cache feature.