How to send an image via Node.js/Express, so it is cached permanently?

Question

What are the required http headers to tell the browser to cache an image forever, when sending it via Node.js?

Look [here](http://stackoverflow.com/questions/7790825/nodejs-express-framework-caching). — robertklep, May 25 '13 at 13:50

score 1 · Accepted Answer · answered May 25 '13 at 14:21

1

Here we go:

if (!res.getHeader('Cache-Control') || !res.getHeader('Expires')) {
    res.setHeader("Cache-Control", "public, max-age=345600"); // ex. 4 days in seconds.
    res.setHeader("Expires", new Date(Date.now() + 345600000).toUTCString());  // in ms.
}

answered May 25 '13 at 14:21

jmingov

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Just to clarify, this only caches for 4 days, right? That doesn't seem all that permanent to me. – D.Tate Mar 23 '16 at 01:05

How to send an image via Node.js/Express, so it is cached permanently?

1 Answers1