The request was rejected because no multipart boundary was found in springboot

Question

As I am trying this with spring boot and webservices with postman chrome add-ons.

In postman content-type="multipart/form-data" and I am getting the below exception.

HTTP Status 500 - Request processing failed; 
nested exception is org.springframework.web.multipart.MultipartException: Could not parse multipart servlet request; 
nested exception is java.io.IOException: 
org.apache.tomcat.util.http.fileupload.FileUploadException: the request was rejected because no multipart boundary was found

In Controller I specified the below code

@ResponseBody
@RequestMapping(value = "/file", headers = "Content-Type= multipart/form-data", method = RequestMethod.POST)

public String upload(@RequestParam("name") String name,
        @RequestParam(value = "file", required = true) MultipartFile file)
//@RequestParam ()CommonsMultipartFile[] fileUpload
{
    // @RequestMapping(value="/newDocument", , method = RequestMethod.POST)
    if (!file.isEmpty()) {
        try {
            byte[] fileContent = file.getBytes();
            fileSystemHandler.create(123, fileContent, name);
            return "You successfully uploaded " + name + "!";
        } catch (Exception e) {
            return "You failed to upload " + name + " => " + e.getMessage();
        }
    } else {
        return "You failed to upload " + name + " because the file was empty.";
    }
}

Here I specify the file handler code

public String create(int jonId, byte[] fileContent, String name) {
    String status = "Created file...";
    try {
        String path = env.getProperty("file.uploadPath") + name;
        File newFile = new File(path);
        newFile.createNewFile();
        BufferedOutputStream stream = new BufferedOutputStream(new FileOutputStream(newFile));
        stream.write(fileContent);
        stream.close();
    } catch (IOException ex) {
        status = "Failed to create file...";
        Logger.getLogger(FileSystemHandler.class.getName()).log(Level.SEVERE, null, ex);
    }
    return status;
}

user_1408954 · Answer

Heard you can do this in postman:

user_8030201 · Answer

When I use postman to send a file which is 5.6M to an external network, I faced the same issue. The same action is succeeded on my own computer and local testing environment.

After checking all the server configs and HTTP headers, I found that the reason is Postman may have some trouble simulating requests to external HTTP requests. Finally, I did the sendfile request on the chrome HTML page successfully. Just as a reference :)

user_6430538 · Answer

I met this problem because I use request.js which writen base on axios
And I already set a defaults.headers in request.js

import axios from 'axios'
const request = axios.create({
  baseURL: '', 
  timeout: 15000 
})
service.defaults.headers.post['Content-Type'] = 'application/x-www-form-urlencoded'

here is how I solve this
instead of

request.post('/manage/product/upload.do',
      param,config
    )

I use axios directly send request,and didn't add config

axios.post('/manage/product/upload.do',
      param
    )

hope this can solve your problem

user_3519504 · Answer

Newer versions of ARC(Advaced Rest client) also provides file upload option:

user_15928285 · Answer

You can try with below simple code, it should work. I tested on Advanced REST Client and below attached screenshot will help for configuration.

package com.example.demo;

import java.io.FileOutputStream;
import java.io.IOException;

import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

@RestController
public class ImageUploadController {

    @PostMapping("image-upload")
    public String uploadImage(@RequestParam MultipartFile myFile) throws IOException {
        
        byte[] bytes = myFile.getBytes();

        FileOutputStream fileOutputStream = new FileOutputStream("image.jpg");

        fileOutputStream.write(bytes);
        fileOutputStream.close();
        
        return "Image uploaded successfully..!";

    }
}

you can find uploaded image on below location in project.

Also please note that if your controller should be within the package of @SpringBootApplication package. You can refer below image.

The request was rejected because no multipart boundary was found in springboot

10 Answers