hello world

Makefile

@@ -0,0 +1,9 @@
+.PHONY: all
+
+fmt:
+	go fmt ./...
+
+vet:
+	go vet ./...
+
+build: fmt vet

etag.go

@@ -0,0 +1,25 @@
+package etag
+
+import (
+	"crypto/sha1"
+	"encoding/hex"
+	"fmt"
+)
+
+func getHash(str string) string {
+	h := sha1.New()
+	h.Write([]byte(str))
+
+	return hex.EncodeToString(h.Sum(nil))
+}
+
+// Generate an Etag for given sring. Allows specifying whether to generate weak
+// Etag or not as second parameter
+func Generate(str string, weak bool) string {
+	tag := fmt.Sprintf("%d-%s", len(str), getHash(str))
+	if weak {
+		tag = "W/" + tag
+	}
+
+	return tag
+}