recently, when I was studying uploading and downloading files, I didn"t quite understand the upload principle of angular-file-upload.js. Is there a great god who can guide the upload principle of
angular-file-upload? If it is a picture, it can be understood that it is converted into base64 and then uploaded, then how does a file that is not a picture be uploaded? that is to say, when it is uploaded, what is actually transmitted to the server
if the server is developed by java, how can it receive the uploaded file