Any way to serve gzip assets from heroku?

Question

I'm wondering if there is any way to get the Rails webserver (thin) to serve the *.gz files the asset pipeline creates. As I understand, those have a higher compression level than that of Rack::Deflater, which only works with serve_static_assets from within the rackup file and not in config.middleware.

A less optimal solution might be to change the default compression level of Zlib which is what Rack::Deflater references. It should only need to gzip once, then it goes to Rack::Cache, then hopefully a CDN.

A second less optimal solution might be a Rack::Rewrite.

Solution

The answer to your question can be found at https://gist.github.com/2152663.

Comments

[willglynn]

Someone made a middleware that appears to do what you want: gist.github.com/2152663

[Joseph Le Brech]

the asset pipeline compiles .gz files as well as regular files, I think pushing that to heroku should work, rack shouldn't have to deflate anything, just serve a .gz instead of a regular asset.

[maletor]

Which is why the gist above does exactly what I need.

[Kevin Walsh]

Another option for serving gzipped assets using Rack::Rewrite gist.github.com/eliotsykes/6049536

[anka]

To summarize the answer: Use this gem github.com/mattolson/heroku_rails_deflate