1 files changed, 35 insertions, 0 deletions
diff --git a/workhorse/internal/urlprefix/urlprefix.go b/workhorse/internal/urlprefix/urlprefix.go
new file mode 100644
index 00000000000..23eefe70c67
--- /dev/null
+++ b/workhorse/internal/urlprefix/urlprefix.go
@@ -0,0 +1,35 @@
+package urlprefix
+
+import (
+	"path"
+	"strings"
+)
+
+type Prefix string
+
+func (p Prefix) Strip(path string) string {
+	return CleanURIPath(strings.TrimPrefix(path, string(p)))
+}
+
+func (p Prefix) Match(path string) bool {
+	pre := string(p)
+	return strings.HasPrefix(path, pre) || path+"/" == pre
+}
+
+// Borrowed from: net/http/server.go
+// Return the canonical path for p, eliminating . and .. elements.
+func CleanURIPath(p string) string {
+	if p == "" {
+		return "/"
+	}
+	if p[0] != '/' {
+		p = "/" + p
+	}
+	np := path.Clean(p)
+	// path.Clean removes trailing slash except for root;
+	// put the trailing slash back if necessary.
+	if p[len(p)-1] == '/' && np != "/" {
+		np += "/"
+	}
+	return np
+}