retrieve list of files
GET the cache listing, DELETE from cache

1. curl http://localhost:3000/
[]

2. echo 'hello world hello Hello' | curl -F filename=stdin -F file=@- http://localhost:3000
{"Total":4,"Words":{"Hello":1,"hello":2,"world":1}}

3. echo 'this is not what I had before' | curl -F filename=stdin -F file=@- http://localhost:3000
{"Total":4,"Words":{"Hello":1,"hello":2,"world":1}}    # you get back cached data though

4. curl http://localhost:3000/
["stdin"]

5. curl -X DELETE http://localhost:3000/?filename=stdin
null

6. curl http://localhost:3000/
[]

7. echo 'this is not what I had before' | curl -F filename=stdin -F file=@- http://localhost:3000
{"Total":7,"Words":{"I":1,"before":1,"had":1,"is":1,"not":1,"this":1,"what":1}}