diff --git a/unknow-server-http/src/main/java/unknow/server/http/servlet/ServletResourceStatic.java b/unknow-server-http/src/main/java/unknow/server/http/servlet/ServletResourceStatic.java
index faee05c9..52586ab6 100644
--- a/unknow-server-http/src/main/java/unknow/server/http/servlet/ServletResourceStatic.java
+++ b/unknow-server-http/src/main/java/unknow/server/http/servlet/ServletResourceStatic.java
@@ -65,8 +65,10 @@ private void process(HttpServletRequest req, HttpServletResponse resp, boolean c
 
 		if (!content)
 			return;
-		ServletOutputStream os = resp.getOutputStream();
-		os.write(data);
+
+		try (ServletOutputStream os = resp.getOutputStream()) {
+			os.write(data);
+		}
 	}
 
 	@Override
diff --git a/unknow-server-http/src/main/java/unknow/server/http/servlet/ServletResponseImpl.java b/unknow-server-http/src/main/java/unknow/server/http/servlet/ServletResponseImpl.java
index fc737bbd..11767fec 100644
--- a/unknow-server-http/src/main/java/unknow/server/http/servlet/ServletResponseImpl.java
+++ b/unknow-server-http/src/main/java/unknow/server/http/servlet/ServletResponseImpl.java
@@ -28,6 +28,7 @@
 import unknow.server.http.HttpConnection;
 import unknow.server.http.HttpError;
 import unknow.server.http.servlet.out.ChunckedOutputStream;
+import unknow.server.http.servlet.out.EmptyStream;
 import unknow.server.http.servlet.out.LengthOutputStream;
 import unknow.server.http.servlet.out.Output;
 import unknow.server.http.servlet.out.ServletWriter;
@@ -220,6 +221,8 @@ public void sendError(HttpError e, int sc, String msg) throws IOException {
 	private <T extends ServletOutputStream & Output> T createStream() {
 		if (contentLength < 0)
 			return (T) new ChunckedOutputStream(p.getOut(), this, bufferSize);
+		if (contentLength == 0)
+			return (T) EmptyStream.INSTANCE;
 		return (T) new LengthOutputStream(p.getOut(), this, contentLength);
 	}
 
diff --git a/unknow-server-http/src/main/java/unknow/server/http/servlet/out/EmptyStream.java b/unknow-server-http/src/main/java/unknow/server/http/servlet/out/EmptyStream.java
index 153f73d5..73c0195d 100644
--- a/unknow-server-http/src/main/java/unknow/server/http/servlet/out/EmptyStream.java
+++ b/unknow-server-http/src/main/java/unknow/server/http/servlet/out/EmptyStream.java
@@ -46,6 +46,19 @@ public void setWriteListener(WriteListener writeListener) { // OK
 	}
 
 	@Override
-	public void write(int b) throws IOException { // OK
+	public void write(int b) throws IOException {
+		throw new IOException("empty stream");
+	}
+
+	@Override
+	public void write(byte[] b) throws IOException {
+		if (b.length > 0)
+			throw new IOException("empty stream");
+	}
+
+	@Override
+	public void write(byte[] b, int off, int len) throws IOException {
+		if (len > 0)
+			throw new IOException("empty stream");
 	}
 }