contentdb file.ext to content-type lookups

pkg/contentdb/Makefile

@@ -0,0 +1,26 @@
+# Generate db.go from db.json downloaded nodejs mime-db project.
+# NOTE: Autogenerated db.go needs to be vet proofed. \
+	Manually edit json -> JSON for all variable names
+all: checkdeps download build
+
+# go-bindata generates go source from any data file.
+checkdeps:
+	@go get -u github.com/jteeuwen/go-bindata/...
+
+# Download db.json from NodeJS's mime-db project. It is under MIT license.
+download: checkdeps
+	@mkdir db
+	@wget -nv https://cdn.rawgit.com/jshttp/mime-db/master/db.json -O db/db.json
+
+
+# After generating db.go, clean up downloaded db.json.
+build: download
+	@go-bindata -pkg contentdb -o db.go db
+	@rm -fv db/db.json
+	@rm -rfv db
+
+# Clean auto-generated files and backups.
+clean:
+	@rm -rf db.go
+	@rm -f *~
+