MissingServletRequestParameterException

I'm passing a formData object to my Spring back-end:

imageBanner(banner: File, bannerPath: string, id: number, callback: (response) => void){ var formData = new FormData(); formData.append('name', banner.name); console.log(formData.get('name')); formData.append('file', banner); console.log(formData.get('file')); this.sendPost("/upload/" + bannerPath, formData, response => { callback(response); });
}

The console log shows:

1.jpg
File {name: "1.jpg", lastModified: 1496737372408, lastModifiedDate: Tue Jun 06 2017 10:22:52 GMT+0200 (W. Europe Daylight Time), webkitRelativePath: "", size: 38983…}

So it looks like the formData has some values.

In the back-end I have this:

@RequestMapping(value="/rest/upload/localeventbanner", method=RequestMethod.POST, headers = "content-type!=multipart/form-data") public @ResponseBody String uploadFileHandler(@RequestParam("name") String name, @RequestParam("file") MultipartFile file) { if (!file.isEmpty()) { try { log("success"); return "You successfully uploaded file=" + name; } catch (Exception e) { log("fail"); return "You failed to upload"; } } else { log("nope"); return "You failed to upload " + name + " because the file was empty."; }
}

The return I'm getting in the console is:

"{"timestamp":1502745177167,"status":400,"error":"Bad Request","exception":"org.springframework.web.bind.MissingServletRequestParameterException","message":"Required String parameter 'name' is not present","path":"/beheerback/rest/upload/localeventbanner"}"

It says name isn't present but when I log it in the front-end it shows name is present in the formData object.

1 Answer

Try to give required = false for name and file, something like:

@RequestParam(value = "name", required = false, defaultValue = "defaultName") String name, @RequestParam(value = "file" , required = false, defaultValue = "defaultFile") MultipartFile file

Then check the values that you're really getting. Also, check the form sent using the network inspector in the dev mode of your browser.