Checks for buffer out of bounds before writing to the stream. Fixes #636

src/test/java/redis/clients/jedis/tests/ProtocolTest.java

@@ -4,6 +4,7 @@ import java.io.BufferedInputStream;
 import java.io.ByteArrayInputStream;
 import java.io.IOException;
 import java.io.InputStream;
+import java.io.OutputStream;
 import java.io.PipedInputStream;
 import java.io.PipedOutputStream;
 import java.util.ArrayList;
@@ -38,6 +39,28 @@ public class ProtocolTest extends JedisTestBase {
 
 	assertEquals(expectedCommand, sb.toString());
     }
+    
+    @Test(expected=IOException.class)
+    public void writeOverflow() throws IOException {
+	RedisOutputStream ros = new RedisOutputStream(new OutputStream() {
+	    
+	    @Override
+	    public void write(int b) throws IOException {
+		throw new IOException("thrown exception");
+		
+	    }
+	});
+	
+	ros.write(new byte[8191]);
+	
+	try {
+	    ros.write((byte)'*');
+	} catch (IOException ioe) {}
+	
+	    
+	ros.write((byte)'*');
+
+    }
 
     @Test
     public void bulkReply() {