Strip leading slashes from requests to download map

http.go

@@ -112,13 +112,7 @@ func redirectHandler(w http.ResponseWriter, r *http.Request) {
 	redirectPath := path.Join(server.Path, r.URL.Path)
 
 	if dlMap != nil {
-		p := r.URL.Path
-
-		if p[0] != '/' {
-			p = "/" + p
-		}
-
-		if newPath, exists := dlMap[p]; exists {
+		if newPath, exists := dlMap[strings.TrimLeft(r.URL.Path, "/")]; exists {
 			downloadsMapped.Inc()
 			redirectPath = path.Join(server.Path, newPath)
 		}

map.go

@@ -4,6 +4,7 @@ import (
 	"encoding/csv"
 	"io"
 	"os"
+	"strings"
 )
 
 func loadMap(file string) (map[string]string, error) {
@@ -32,7 +33,7 @@ func loadMap(file string) (map[string]string, error) {
 			return nil, err
 		}
 
-		m[row[0]] = row[1]
+		m[strings.TrimLeft(row[0], "/")] = strings.TrimLeft(row[1], "/")
 	}
 
 	return m, nil