Question

I’m trying to validate the contents of some files through a web interface and use the response to enable / disable some other functionality … like a save button. I’ve got as far as the submit and file handling (stubbed) but I cant seem to get my response to work properly.

Problem : on response tries to make user download a file with the response contents. I want to just pass the response to the success function to be handled.

JS Function Code:

function validateCopybook() {
        //submit values. 
        console.log("validating");
        if (this.getForm().isValid()) {
            this.getForm().submit({
            url : 'batch/validateCopybook.json',
            waitMsg : 'Validating...',
            success : function(form, action) {
                this.msg('Success', 'Processed file on the server');


                }
            });
        }
    }

Server side code :

public ModelAndView validateCopybook(HttpServletRequest request, HttpServletResponse response) throws Exception
{
    // Check whether we're dealing with a multipart request
    String contentHeader = request.getHeader("content-type");
    boolean isMultipart = (contentHeader != null && contentHeader.indexOf("multipart/form-data") != -1);

    if (isMultipart == false)
    {
        return Helper.errorResponse("not multipart");
    }
    else
    {
        DefaultMultipartHttpServletRequest reqM = (DefaultMultipartHttpServletRequest) request;
        MultiValueMap<String, MultipartFile> fileMap = reqM.getMultiFileMap();
        MultipartFile copyIn = fileMap.get("copy-path-in").get(0);
        MultipartFile copyOut = fileMap.get("copy-path-out").get(0);
    }

    System.out.println(response.getContentType());
    response.setContentType("application/json");

    ModelAndView mav = Helper.successResponse("success");
    return mav;
}

Response returned :

ModelAndView: reference to view with name 'json'; model is {model={data={"success":true,"info":"success","dataLength":0,"data":[]}}}

Any ideas ?

Answer 1

Ok I wasnt setting the response header correctly

 response.setContentType("application/json");

wasnt enough.

        MappingJacksonJsonView view = new MappingJacksonJsonView();
    view.setContentType("text/html");
    Map<String, Object> responseMap = new HashMap<String, Object>();
    responseMap.put("success", true);
    ModelAndView mav = new ModelAndView(view, responseMap);

Works correctly.