Issue #12680 - Test of 2GB+ files on ResourceHandler.

jetty-core/jetty-server/src/test/java/org/eclipse/jetty/server/handler/ResourceHandlerTest.java

@@ -18,13 +18,16 @@
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
+import java.nio.ByteBuffer;
+import java.nio.channels.SeekableByteChannel;
 import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
 import java.nio.file.InvalidPathException;
 import java.nio.file.Path;
 import java.nio.file.StandardOpenOption;
 import java.nio.file.attribute.FileTime;
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.List;
 import java.util.function.Consumer;
 import java.util.regex.Matcher;
@@ -760,6 +763,28 @@ public void testBigger() throws Exception
         assertThat(response.getContent(), containsString("   400\tThis is a big file\n"));
     }
 
+    @Test
+    public void testOver2GBFile() throws Exception
+    {
+        long hugeLength = (long)Integer.MAX_VALUE + 10L;
+
+        generateFile(docRoot.resolve("huge.mkv"), hugeLength);
+
+        HttpTester.Response response = HttpTester.parseResponse(
+            _local.getResponse("""
+                GET /context/huge.mkv HTTP/1.1\r
+                Host: local\r
+                Connection: close\r
+                \r
+                """));
+
+        System.err.println(response);
+
+        assertThat(response.getStatus(), is(HttpStatus.OK_200));
+        long responseContentLength = response.getLongField(CONTENT_LENGTH);
+        assertThat(responseContentLength, is(hugeLength));
+    }
+
     @Test
     public void testBrotliInitialCompressed() throws Exception
     {
@@ -3939,6 +3964,40 @@ private void setupBigFiles(Path base) throws Exception
         }
     }
 
+    private void generateFile(Path staticFile, long size) throws Exception
+    {
+        byte[] buf = new byte[(int)(1024 * 1024)]; // about 1 MB
+        Arrays.fill(buf, (byte)'x');
+        ByteBuffer src = ByteBuffer.wrap(buf);
+
+        if (Files.exists(staticFile) && Files.size(staticFile) == size)
+        {
+            // all done, nothing left to do.
+            System.err.printf("File Exists Already: %s (%,d bytes)%n", staticFile, Files.size(staticFile));
+            return;
+        }
+
+        System.err.printf("Creating %,d byte file: %s ...%n", size, staticFile);
+        try (SeekableByteChannel channel = Files.newByteChannel(staticFile, StandardOpenOption.CREATE, StandardOpenOption.WRITE, StandardOpenOption.TRUNCATE_EXISTING))
+        {
+            long remaining = size;
+            while (remaining > 0)
+            {
+                ByteBuffer slice = src.slice();
+                int len = buf.length;
+                if (remaining < Integer.MAX_VALUE)
+                {
+                    len = Math.min(buf.length, (int)remaining);
+                    slice.limit(len);
+                }
+
+                channel.write(slice);
+                remaining -= len;
+            }
+        }
+        System.err.println(" Done");
+    }
+
     private void setupQuestionMarkDir(Path base) throws IOException
     {
         boolean filesystemSupportsQuestionMarkDir = false;