further improve initial CGI path stripping

Signed-off-by: kim (grufwub) <grufwub@gmail.com>

core/cgi.go

@@ -42,9 +42,10 @@ func generateCGIEnv(client *Client, request *Request, pathInfo string) []string
 func TryExecuteCGIScript(client *Client, request *Request) *errors.Error {
 	// Get relative path with CGI dir stripped
 	partial := request.Path().Relative()[len(cgiPath.Relative()):]
-	if len(partial) > 0 && partial[0] == '/' {
-		partial = partial[1:]
+	if len(partial) == 0 {
+		return errors.NewError(RestrictedPathErr)
 	}
+	partial = partial[1:]
 
 	// Start with the CGI dir path
 	nextPath := cgiPath

core/server.go

@@ -14,7 +14,7 @@ import (
 
 const (
 	// Version holds the current version string
-	Version = "v3.1.8-beta4"
+	Version = "v3.1.8-beta5"
 )
 
 var (