Cache text responses in browser

Question

The scenario is the following:

The request comes on server side.
The server gets the content of a file and modifies it, computing the information that comes from request.
The server sends the response sending the computed information (string) using response.end(content).

Is it possible to cache such response in browser?

Right now, I only cache in browser files (images, CSS & HTML files etc) that are streamed using stream.pipe(response). I use stats = Fs.lstatSync(fileName) to get stats about the file. Caching stuff code is located here.

If the response is just text, I cannot have any stats, because I don't have a file but a long string.

How can I cache text responses? How can I handle them modifications?

Just to make sure: whenever you hit `/url1`, the response will always be the same? — Florian Margaine, Jun 16 '14 at 12:15
@FlorianMargaine In the most of cases yes. That's why I am asking how to handle modifications. But basically, yes. — Ionică Bizău, Jun 16 '14 at 12:16
For a browser, knowing whether to cache or not depends on the url, not on the request body. So you have to make sure that the url **always** returns the same response. — Florian Margaine, Jun 16 '14 at 12:20
@FlorianMargaine OK! Let's suppose that. It would be perfect in my case. — Ionică Bizău, Jun 16 '14 at 12:53
Then simply set the cache header on the response. See [here](http://stackoverflow.com/a/8007793/851498) — Florian Margaine, Jun 16 '14 at 13:15
@FlorianMargaine Is that enough? I suppose there should be a `304` response also (when the content is already cached). — Ionică Bizău, Jun 16 '14 at 13:29
I think that is managed by node itself. Try to keep the headers and body same. If the etag remains same it will send 304 automatically. — user568109, Jun 16 '14 at 15:29

Cache text responses in browser

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