Enable use with memory-fs

[gajus]

I am producing all the files and storing them only in memory, i.e. https://github.com/webpack/memory-fs. I'd like there to be an option to tell serve-static which fs to use.

[dougwilson]

Does that module actually implement enough of the features to work here? I didn't look at it immediately but I remember at least one previous issue about this. Of course, please feel so inclined to make a PR in which you think the ideal implementation should be. This module does not require(fs) anywhere, so the change here is not obvious to me.

[gajus]

This module does not require(fs) anywhere, so the change here is not obvious to me.

serve-static is using send to read-stream files.

serve-static/index.js

Line 96 in f75f969

var stream = send(req, path, opts)

Bummer. This would require modification of send as well as serve-static.

I see that send is using only stat and createReadStream. memory-fs implements these methods.

Supporting this feature would require send to introduce a factory abstraction.

This is too low of a priority for me to champion such change. I will rather simply write to the disk and continue using serve-static.

Lets leave this open and see if more people require this feature. I am sensing it might be an edge use case.

[acupofspirt]

I have the same issue. Is there any way to provide fs module?

[hinell]

Highly related #pillarjs/send/issues/160