micronaut file upload

micronaut-file-upload.java

package example.micronaut;

//tag::imports[]
import io.micronaut.http.HttpResponse;
import io.micronaut.http.MediaType;
import io.micronaut.http.annotation.Consumes;
import io.micronaut.http.annotation.Controller;
import io.micronaut.http.annotation.Get;
import io.micronaut.http.annotation.Post;
import io.micronaut.http.multipart.CompletedFileUpload;
import io.micronaut.views.View;

import javax.annotation.Nullable;
import java.net.URI;
import java.util.HashMap;
import java.util.Map;
//end::imports[]


@Controller("/")
public class HomeController {

    public static final String REDIRECT_PATH = "/";

    public static String IMAGE_KEY = "some-file.png";

    private final FileRepository fileRepository;

    public HomeController(FileRepository fileRepository) { //inject
        this.fileRepository = fileRepository;
    }
  

    @View("home")
    @Get
    public Map<String, Object> index() {
        return Map.of("message", "Hi there! This is simple example of upload file");
    }
  
  
    @Consumes(MediaType.MULTIPART_FORM_DATA)
    @Post("/upload")
    public HttpResponse upload(CompletedFileUpload file) {
        if ((file.getFilename() == null || file.getFilename().equals(""))) {
            return HttpResponse.seeOther(URI.create(REDIRECT_PATH));
        }
        fileRepository.upload(IMAGE_KEY, file);
        return HttpResponse.seeOther(URI.create(REDIRECT_PATH));
    }


    @Consumes(MediaType.APPLICATION_FORM_URLENCODED)
    @Post("/delete")
    public HttpResponse delete(String key) {
        fileRepository.delete(key);
        return HttpResponse.seeOther(URI.create(REDIRECT_PATH));
    }
}