Jason Jason - 5 months ago 39
AngularJS Question

Spring file upload - getting Expected MultipartHttpServletRequest: is a MultipartResolver configured? error

I'm trying to incorporate multiple file upload functionality in my Angular web application using angular-file-upload. Currently, the front end functionality works, but each upload attempt throws a

java.lang.IllegalStateException,java.io.IOException]:
java.lang.IllegalArgumentException: Expected MultipartHttpServletRequest:
is a MultipartResolver configured?


exception.

The Upload Controller is defined as

@Controller
@PropertySource("classpath:application.properties")
public class FileUploadController {

@Resource
private Environment env;

@RequestMapping(value = "/fileupload", method = RequestMethod.POST)
@ResponseBody
public List<String> fileUpload(@RequestParam("file") MultipartFile[] uploadFiles) throws IllegalStateException, IOException {
//file processing logic
}
}


In my
AppConfig.java
class, I declare the bean

@Bean
public CommonsMultipartResolver commonsMultipartResolver(){
CommonsMultipartResolver commonsMultipartResolver = new CommonsMultipartResolver();
commonsMultipartResolver.setDefaultEncoding("utf-8");
commonsMultipartResolver.setMaxUploadSize(50000000);
return commonsMultipartResolver;
}


and start the web application with

@Override
public void onStartup(ServletContext servletContext) throws ServletException {

AnnotationConfigWebApplicationContext ctx = new AnnotationConfigWebApplicationContext();
ctx.register(AppConfig.class);
servletContext.addListener(new ContextLoaderListener(ctx));

ctx.setServletContext(servletContext);
ctx.refresh();

Dynamic servlet = servletContext.addServlet(SERVLET_NAME, new DispatcherServlet(ctx));
servlet.addMapping("/");
servlet.setLoadOnStartup(1);
//servlet.setMultipartConfig(ctx.getBean(MultipartConfigElement.class));
}


I do not think it is due to the lack of a
<form>
element in my Angular view, because I can see that
Content-Tyle
is
multipart/form-data
and that the Request Payload is set appropriately.

Remote Address:192.168.33.10:80
Request URL:http://dev.jason.com/rest/fileupload
Request Method:POST
Status Code:500 Internal Server Error
Request Headers
Accept:*/*
Accept-Encoding:gzip,deflate
Accept-Language:en-US,en;q=0.8
Cache-Control:no-cache
Connection:keep-alive
Content-Length:415235
Content-Type:multipart/form-data; boundary=----WebKitFormBoundaryBHlsldPQysTVpvwZ
Host:dev.jason.com
Origin:http://dev.jason.com
Pragma:no-cache
Referer:http://dev.jason.com/
User-Agent:Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/38.0.2125.122 Safari/537.36
Request Payload
------WebKitFormBoundaryBHlsldPQysTVpvwZ
Content-Disposition: form-data; name="file"; filename="IMG_5072.jpg"
Content-Type: image/jpeg

------WebKitFormBoundaryBHlsldPQysTVpvwZ--


Note that this issue still occurs when including

@Bean
public MultipartConfigElement multipartConfigElement(){
MultipartConfigFactory multipartConfigFactory = new MultipartConfigFactory();
multipartConfigFactory.setMaxFileSize("10MB");
multipartConfigFactory.setMaxRequestSize("50MB");
return multipartConfigFactory.createMultipartConfig();
}


in
AppConfig.java
and uncommenting the command

servlet.setMultipartConfig(ctx.getBean(MultipartConfigElement.class));


in my servlet initializer class.

Any help is appreciated!

Answer

Spring's MVC stack requires that the MultipartResolver bean be called multipartResolver. Change your @Bean method to

@Bean
public CommonsMultipartResolver multipartResolver(){

or

@Bean(name="multipartResolver")
public CommonsMultipartResolver commonsMultipartResolver(){