Add 'ocis-pkg/' from commit '72d605ba3857d0b972ddd72e226d8a5360fb480d'

git-subtree-dir: ocis-pkg
git-subtree-mainline: 4c12bed11b
git-subtree-split: 72d605ba38

ocis-pkg/middleware/static.go

@@ -0,0 +1,35 @@
+package middleware
+
+import (
+	"net/http"
+	"path"
+	"strings"
+)
+
+// Static is a middleware that serves static assets.
+func Static(root string, fs http.FileSystem) func(http.Handler) http.Handler {
+	if !strings.HasSuffix(root, "/") {
+		root = root + "/"
+	}
+
+	static := http.StripPrefix(
+		root,
+		http.FileServer(
+			fs,
+		),
+	)
+
+	return func(next http.Handler) http.Handler {
+		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			if strings.HasPrefix(r.URL.Path, path.Join(root, "api")) {
+				next.ServeHTTP(w, r)
+			} else {
+				if strings.HasSuffix(r.URL.Path, "/") {
+					http.NotFound(w, r)
+				} else {
+					static.ServeHTTP(w, r)
+				}
+			}
+		})
+	}
+}