    public void testRenameTo() throws Exception {
        TestHttpData test = new TestHttpData("test", UTF_8, 0);
        try {
            File tmpFile = PlatformDependent.createTempFile(UUID.randomUUID().toString(), ".tmp", null);
            tmpFile.deleteOnExit();
            final int totalByteCount = 4096;
            byte[] bytes = new byte[totalByteCount];
            PlatformDependent.threadLocalRandom().nextBytes(bytes);
            ByteBuf content = Unpooled.wrappedBuffer(bytes);
            test.setContent(content);
            boolean succ = test.renameTo(tmpFile);
            assertTrue(succ);
            FileInputStream fis = new FileInputStream(tmpFile);
            try {
                byte[] buf = new byte[totalByteCount];
                int count = 0;
                int offset = 0;
                int size = totalByteCount;
                while ((count = fis.read(buf, offset, size)) > 0) {
                    offset += count;
                    size -= count;
                    if (offset >= totalByteCount || size <= 0) {
                        break;
                    }
                }
                assertArrayEquals(bytes, buf);
                assertEquals(0, fis.available());
            } finally {
                fis.close();
            }
        } finally {
            //release the ByteBuf in AbstractMemoryHttpData
            test.delete();
        }
    }
Opening temporary files without appropriate measures or controls can leave the file, its contents and any function that it impacts vulnerable to attack.