DataSubmitController.java

package pl.piotrsukiennik.whowhen.web.controller;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Controller;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import pl.piotrsukiennik.whowhen.backend.api.outer.BackendRequest;
import pl.piotrsukiennik.whowhen.backend.api.outer.IBackendService;
import pl.piotrsukiennik.whowhen.shared.form.WhoWhenRequestForm;
import pl.piotrsukiennik.whowhen.web.util.RequestValidator;

import javax.annotation.Resource;
import java.io.File;
import java.io.FileOutputStream;

@Controller
public class DataSubmitController {
    @Value( "#{serviceProperties['frontend.apacheDeploymentPath']}" )
    private String apacheDeploymentPath;

    @Value( "#{requestProperties['maxFileSize']}" )
    private String maxFileSize;

    public static final String TARGET_DATA_FILE_NAME = "file";

    @Resource
    private IBackendService backendService;

    @RequestMapping( value = "/", method = RequestMethod.POST )
    public String indexPOST(
     @ModelAttribute( value = "FORM" ) WhoWhenRequestForm form,
     @RequestParam( value = "redirect", required = true ) String redirect,

     BindingResult result ) {
        RequestValidator requestValidator = new RequestValidator();
        requestValidator.validate( form, result );

        if ( !result.hasErrors() && form.getFile().getSize() < Long.valueOf( maxFileSize ) ) {
            FileOutputStream outputStream = null;
            try {
                String requestIdentifier = generateRequestIdentifier();
                //System.out.println("1");
                byte[] fileBytes = form.getFile().getFileItem().get();
                String targetDir = apacheDeploymentPath + requestIdentifier + File.separator;
                String filePath = targetDir + TARGET_DATA_FILE_NAME;
                File targetFile = new File( filePath );
                // System.out.println("2");
                if ( !targetFile.exists() ) {
                    targetFile.getParentFile().mkdirs();
                    outputStream = new FileOutputStream( targetFile );
                    outputStream.write( fileBytes );
                    outputStream.close();
                }
                BackendRequest backendRequest = new BackendRequest( requestIdentifier, FormUtil.toRequestData( form ), targetFile );
                backendService.handle( backendRequest );
                return "redirect:" + redirect + backendRequest.getRequestIdentifier() + "/request";

            }
            catch ( Exception e ) {
                e.printStackTrace();

            }
        }
        return "redirect:/?error=true";
    }

    protected String generateRequestIdentifier() {
        return java.util.UUID.randomUUID().toString();
    }

}