Fix potential security vulnerabilities and now download file can know file size

Author: itning

pom.xml

@@ -4,7 +4,7 @@
     <groupId>com.ning</groupId>
     <artifactId>shw</artifactId>
     <packaging>war</packaging>
-    <version>1.1.1-RELEASE</version>
+    <version>1.2.0-RELEASE</version>
     <name>shw Maven Webapp</name>
     <url>http://maven.apache.org</url>
     <properties>