spring 3 uploadify giving 404 Error - spring-mvc

Question

I am using Spring 3 and implementing Uploadify. The problem is, the files are updating properly but it is giving HTTP Error 404, on completion of file upload. I tried every possible solution, but none of them works.
The files are uploaded. Values are storing in DB properly, only that i am getting HTTP Error 404. Any help is appreciated and Thanks in advance.
The Solution is :
Finally i found the solution but it is lame.
I removed the return "" and changed the method as void. Thats it.
But still i don't understand why the same code is working in Spring 2.5.6 and not in 3.
The URL of the screenshot : http://imgur.com/bf3qo
The JSP Page
$(function() {
$('#file_upload').uploadify({
'swf' : 'scripts/uploadify.swf',
'fileObjName' : 'the_file',
'fileTypeExts' : '*.gif; *.jpg; *.jpeg; *.png',
'multi' : true,
'uploader' : '/photo/savePhoto',
'fileSizeLimit' : '10MB',
'uploadLimit' : 50,
'onUploadStart' : function(file) {
$('#file_upload').uploadify('settings', 'formData', {'trip_id' :'1', 'trip_name' :'Sample Trip', 'destination_trip' :'Mumbai','user_id' :'1','email' :'s#s.com','city_id' :'12'});
},
'onQueueComplete' : function(queueData) {
console.log('queueData : '+queueData);
window.location.href = "trip/details/1";
}
});
});
The Controller
#RequestMapping(value="photo/{action}", method=RequestMethod.POST)
public String postHandler(#PathVariable("action") String action, HttpServletRequest request) {
if(action.equals("savePhoto"))
{
try{
MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest)request;
MultipartFile file = multipartRequest.getFile("the_file");
String trip_id = request.getParameter("trip_id");
String trip_name = request.getParameter("trip_name");
String destination_trip = request.getParameter("destination_trip");
String user_id = request.getParameter("user_id");
String email = request.getParameter("email");
String city_id = request.getParameter("city_id");
photo.savePhoto(file,trip_id,trip_name,destination_trip,user_id,email,city_id);
photo.updatetrip(photo_id,trip_id);
}catch(Exception e ){e.printStackTrace();}
}
return "";
} **Solution** : Change the method return type as void and remove the return
spring config
<bean class="org.springframework.web.multipart.commons.CommonsMultipartResolver" id="multipartResolver">
<property name="maxUploadSize" value="10000000"/>
</bean>
Web.xml is
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
<display-name>project_name</display-name>
<distributable/>
<context-param>
<param-name>log4jConfigLocation</param-name>
<param-value>classpath:log4j.properties</param-value>
</context-param>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/project_name-servlet.xml,/WEB-INF/applicationContext-jdbc.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
</listener>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<servlet>
<servlet-name>project_name</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>project_name</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<session-config>
<session-timeout>60</session-timeout>
</session-config>
</web-app>

Answer 1

maybe you simply haven't page trip/details/1 in your application?
EDIT:
Change window.location.href = "trip/details/1"; to
window.location.href = "<%= request.getContextPath() %>/trip/details/1";

Answer 2

The files are uploaded. Values are storing in DB properly, only that i
am getting HTTP Error 404.
What this tells me is that your request is properly being submitted to the URL at '/photo/*'
and is properly handled by the postHandler() method.
You're getting a 404 because your web application doesn't know what to do with the url of "" that the postHandler() method is trying to direct you to.
There is most likely (and I'm making some assumptions here, it'd be helpful if you included the web.xml) a request mapper not set up to handle the " " that your controller is returning; make your controller return some sort of meaningful view name that has a valid servlet mapping and you will not get a 404.

Answer 3

I had this problem too. I added "#ResponseBody" and got the right result.
I think the problem is that without the annotation "#ResponseBody", the returned string is handled by some strange resolver and javascript code gets response of unexpected form.
#RequestMapping(value="/uploadFile",method=RequestMethod.POST)
public #ResponseBody String upload(HttpServletResponse response,
HttpServletRequest request) throws IOException{