Spring MVC: best practices for 'No multipart boundary was found' scenarios When Uploading Files?
I'm experimenting with I'm testing a new approach and Quick question that's been bugging me - I'm working on a Spring MVC application (version 5.3.10) and I'm working with an behavior when trying to upload files through a form. The form uses enctype='multipart/form-data', and the controller method is set up to handle multipart requests. However, upon submitting, I'm getting the behavior message: `No multipart boundary was found`. I've checked the client-side code, and it seems to be set up correctly. Here’s the relevant part of my controller: ```java @PostMapping("/upload") public ResponseEntity<String> handleFileUpload(@RequestParam("file") MultipartFile file) { if (file.isEmpty()) { return ResponseEntity.badRequest().body("File is empty"); } // Process the file return ResponseEntity.ok("File uploaded successfully"); } ``` And my HTML form looks like this: ```html <form method="post" action="/upload" enctype="multipart/form-data"> <input type="file" name="file" /> <button type="submit">Upload</button> </form> ``` I've also made sure that the necessary dependencies for file upload are included in my `pom.xml`: ```xml <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-tomcat</artifactId> <scope>provided</scope> </dependency> ``` Additionally, I've checked my `application.properties` for any multipart settings: ```properties spring.servlet.multipart.enabled=true spring.servlet.multipart.max-file-size=10MB spring.servlet.multipart.max-request-size=10MB ``` Despite these configurations, I still receive the same behavior. I suspect it could be an scenario with how the form data is being sent, or perhaps a missing configuration? Any ideas on how to troubleshoot this further or resolve the scenario? Am I missing something obvious? I'm working on a mobile app that needs to handle this. Thanks, I really appreciate it! This is happening in both development and production on macOS. What am I doing wrong?