Bug fixes (im frustrated)

src/main/java/org/openautonomousconnection/webserver/utils/HeaderMaps.java

@@ -0,0 +1,32 @@
+package org.openautonomousconnection.webserver.utils;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * Small helper utilities for mutable header maps.
+ */
+public final class HeaderMaps {
+
+    private HeaderMaps() {
+    }
+
+    /**
+     * Creates an empty mutable header map.
+     *
+     * @return mutable map
+     */
+    public static Map<String, String> mutable() {
+        return new HashMap<>();
+    }
+
+    /**
+     * Creates a mutable header map initialized with the given entries.
+     *
+     * @param initial initial entries (may be null)
+     * @return mutable map
+     */
+    public static Map<String, String> mutable(Map<String, String> initial) {
+        return (initial == null || initial.isEmpty()) ? new HashMap<>() : new HashMap<>(initial);
+    }
+}

src/main/java/org/openautonomousconnection/webserver/utils/HttpsProxy.java

@@ -43,7 +43,7 @@ public final class HttpsProxy {
             return new WebResponsePacket(
                     502,
                     "text/plain; charset=utf-8",
-                    Map.of(),
+                    HeaderMaps.mutable(),
                     ("Bad Gateway: " + e.getClass().getName() + ": " + e.getMessage()).getBytes(StandardCharsets.UTF_8)
             );
         }
@@ -54,7 +54,7 @@ public final class HttpsProxy {
             return new WebResponsePacket(
                     508,
                     "text/plain; charset=utf-8",
-                    Map.of(),
+                    HeaderMaps.mutable(),
                     "Too many redirects".getBytes(StandardCharsets.UTF_8)
             );
         }
@@ -82,7 +82,7 @@ public final class HttpsProxy {
                 return new WebResponsePacket(
                         502,
                         "text/plain; charset=utf-8",
-                        Map.of(),
+                        HeaderMaps.mutable(),
                         ("Bad Gateway: redirect without Location (code=" + code + ")").getBytes(StandardCharsets.UTF_8)
                 );
             }
@@ -104,8 +104,7 @@ public final class HttpsProxy {
             con.disconnect();
         }
 
-        Map<String, String> headers = new HashMap<>();
-        return new WebResponsePacket(code, contentType, headers, body);
+        return new WebResponsePacket(code, contentType, HeaderMaps.mutable(), body);
     }
 
     private static byte[] readAllBytes(InputStream in) throws Exception {