lunr

https://github.com/jbarnette/lunr

A simple read-only interface to Solr, built on Sunspot. Lunr makes it easy to query and create objects from a Sunspot-managed Solr index without requiring all the knowledge, code, and data used to build the index in the first place. If you have complex indexes with a stored fields and need to search / access those fields without access to the original data store, Lunr might be what you're looking for.