From e98937d0b323d119f5e7c2fbe808f6cca21d03cd Mon Sep 17 00:00:00 2001
From: Arnaud Roques <plantuml@gmail.com>
Date: Mon, 20 May 2019 20:12:41 +0200
Subject: [PATCH] ALLOW_PLANTUML_INCLUDE

---
 .../java/net/sourceforge/plantuml/servlet/PlantUmlServlet.java | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/main/java/net/sourceforge/plantuml/servlet/PlantUmlServlet.java b/src/main/java/net/sourceforge/plantuml/servlet/PlantUmlServlet.java
index 6f2ae11..625cc9e 100644
--- a/src/main/java/net/sourceforge/plantuml/servlet/PlantUmlServlet.java
+++ b/src/main/java/net/sourceforge/plantuml/servlet/PlantUmlServlet.java
@@ -66,6 +66,9 @@ public class PlantUmlServlet extends HttpServlet {
     private static final Pattern RECOVER_UML_PATTERN = Pattern.compile("/uml/(.*)");
     static {
         OptionFlags.ALLOW_INCLUDE = false;
+        if ("true".equalsIgnoreCase(System.getenv("ALLOW_PLANTUML_INCLUDE"))) {
+            OptionFlags.ALLOW_INCLUDE = true;
+        }
     }
 
     @Override