Programmers are working on Java language for designing top-notch projects or programs for web applications and websites. It is a language that has recognition all over the world, and that’s the reason programmers are using it, even beginners are also learning it. A Multipart is a container responsible for holding various body parts along with providing a way to set the subparts. It acts as the base class as well. When working on a Java program, you may get ‘MultipartException: Current request is not a multipart request’.
The error makes you worried, but there is no need to get panicked as this is a common exception. And, we are here to provide easy ways to help you. Check out how error occurs
How error occurs
When you work on a project to a make restful controller so that you can upload files, you end up with the exception. Have a look at the program
@RestController
public class MaterialController {
@RequestMapping(value="/upload", method= RequestMethod.POST)
public String handleFileUpload(
@RequestParam("file") MultipartFile file){
String name = "test11";
if (!file.isEmpty()) {
try {
byte[] bytes = file.getBytes();
BufferedOutputStream stream =
new BufferedOutputStream(new FileOutputStream(new File(name + "-uploaded")));
stream.write(bytes);
stream.close();
return "You successfully uploaded " + name + " into " + name + "-uploaded !";
} catch (Exception e) {
return "You failed to upload " + name + " => " + e.getMessage();
}
} else {
return "You failed to upload " + name + " because the file was empty.";
}
}
}After the code, you may have used the postman in order to send a pdf, but in return, you get the error warning.
MultipartException: Current request is not a multipart requestHow to Fix ‘MultipartException: Current request is not a multipart request’
The prime reason for the error is using postman for sending a multipart request with no custom Content-Type specified in the header. It makes the header tab blank as a result in the postman. The Postman is used to determine the form-data boundary.
Check out the solution to fix the error warning
Solution 1 – Postman setting
With this, the issue can be resolved. You just need to select the type of file in the body tab of Postman. The ‘Missing start boundary’ is a server error. Check out the solution code
POST /v1/media_photos HTTP/1.1
Host: ****
Authorization: ****
Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryp7MA4YWxkTrZu0gW
Cache-Control: no-cache
Postman-Token: 9b823259-ee15-16fe-6aa0-cd094d23286e
----WebKitFormBoundaryE19zNvXGzXaLvS5C
Content-Disposition: form-data; name="photo"; filename="Canon_CanonEOS_4800x3200.jpg"
Content-Type: image/jpeg
----WebKitFormBoundaryE19zNvXGzXaLvS5C
Content-Disposition: form-data; name="metadata"; filename="metadata.json"
Content-Type: application/json
----WebKitFormBoundaryE19zNvXGzXaLvS5C
Content-Disposition: form-data; name="thumbnail"; filename="thumbnail.jpg"
Content-Type: image/jpeg
----WebKitFormBoundaryE19zNvXGzXaLvS5CCURL command is recommended by Postman. Look below
curl -X POST -H Authorization: *** -H Content-Type:multipart/form-data; boundary=----WebKitFormBoundaryp7MA4YWxkTrZu0gW -H Cache-Control:no-cache -H Postman-Token:298b7786-7f5b-9fce-d290-e51e5d13c915 -F photo= -F metadata= -F thumbnail= http://***/v1/media_photosThe code that is working as CURL code is:
curl --header "Authorization: ***" -F "[email protected]" -F "[email protected]" -F metadata='{"file_size":879394}' http://***/v1/media_photosSolution 2 – Modify client-side form
If you have a problem requesting to the server that is not a multipart request, then you should modify the client-side form to fix the error warning. Follow the code:
<form action="..." method="post" enctype="multipart/form-data">
<input type="file" name="file" />
</form>Solution 3 – Add the Code
You need to add the following code in your application.properties
spring.servlet.multipart.max-file-size=128KB
spring.servlet.multipart.max-request-size=128KB
spring.http.multipart.enabled=falseTo add in html form, add the following code
<form method="POST" enctype="multipart/form-data" action="/">This will resolve the error warning.
Conclusion
Here you are! The tips and solutions are discussed to fix ‘MultipartException: Current request is not a multipart request’. It is completely on you to choose the solution that is suitable for your program.
I hope it helps!
Reference Source: https://dtuto.com/questions/12629/multipartexception-current-request-is-not-a-multipart-request