The purpose of Rack::GridServe is to provide an alternative to
Rack::Gridfs which works with the Mongo ruby driver version 2.0
and above. This driver has a different API and while the Rack::Gridfs
team is working on it, it is not yet ready.
While Rack::GridServe can be used the same way, it is by no mean
as complete and well crafted as Rack::Gridfs. So I recommend that
you switch back when their next version is ready.
Until then, the function is the same, you can mount the middleware
in order to serve images which are hosted in the GridFS part
of a Mongo database.
Here is how you mount it in your config.ru:
require 'rack/grid_serve'
use Rack::GridServe, {
db: $db,
prefix: 'gridfs', # Path prefix, default is "gridfs"
cache_control: 'no-cache' # Default is "no-cache"
}These are the only options so far.
Rack::GridServe sets the ETag and Last-Modified response
headers and uses Rack::ConditionalGet to let the browser use
cached version of the files when possible.
Run tests this way:
bundle exec ruby -I lib test.rb