From a6995708a8b928e810eab78012849b65854183b5 Mon Sep 17 00:00:00 2001
From: Christoph John <christoph.john@macd.com>
Date: Thu, 27 Jul 2023 14:16:58 +0200
Subject: [PATCH] Added check for HttpUrlConnection to changes done in #460

---
 .../src/main/java/quickfix/FileUtil.java         | 16 ++++++++++++----
 .../src/test/java/quickfix/FileUtilTest.java     |  9 +++++++++
 2 files changed, 21 insertions(+), 4 deletions(-)

diff --git a/quickfixj-core/src/main/java/quickfix/FileUtil.java b/quickfixj-core/src/main/java/quickfix/FileUtil.java
index b589980895..9bf228e137 100644
--- a/quickfixj-core/src/main/java/quickfix/FileUtil.java
+++ b/quickfixj-core/src/main/java/quickfix/FileUtil.java
@@ -26,6 +26,7 @@
 import java.io.InputStream;
 import java.net.HttpURLConnection;
 import java.net.URL;
+import java.net.URLConnection;
 
 
 public class FileUtil {
@@ -144,10 +145,17 @@ public static InputStream open(Class<?> clazz, String name, Location... location
             case URL:
                 try {
                     URL url = new URL(name);
-                    HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();
-                    httpURLConnection.setRequestProperty("User-Agent", "Java-QuickFIXJ-FileUtil");
-                    httpURLConnection.connect();
-                    in = httpURLConnection.getInputStream();
+                    URLConnection urlConnection = url.openConnection();
+                    if (urlConnection instanceof HttpURLConnection) {
+                        HttpURLConnection httpURLConnection = (HttpURLConnection)urlConnection;
+                        httpURLConnection.setRequestProperty("User-Agent", "Java-QuickFIXJ-FileUtil");
+                        httpURLConnection.connect();
+                        in = httpURLConnection.getInputStream();
+                    } else {
+                        if (urlConnection != null) {
+                            in = urlConnection.getInputStream();
+                        }
+                    }
                 } catch (IOException e) {
                     // ignore
                 }
diff --git a/quickfixj-core/src/test/java/quickfix/FileUtilTest.java b/quickfixj-core/src/test/java/quickfix/FileUtilTest.java
index 16cffdc225..c50b4a21a4 100644
--- a/quickfixj-core/src/test/java/quickfix/FileUtilTest.java
+++ b/quickfixj-core/src/test/java/quickfix/FileUtilTest.java
@@ -67,6 +67,15 @@ public void testURLLocation() throws Exception {
         }
     }
 
+    @Test
+    public void testJARURLLocation() throws Exception {
+        // just test that we don't run into a ClassCastException
+        InputStream in = FileUtil.open(Message.class, "jar:file:/foo.bar!/");
+        if (in != null) {
+            in.close();
+        }
+    }
+
     @Test
     // QFJ-775
     public void testSessionIDFileName() {