I am making a server to process file uploads. Here is my current front end code.
document.querySelector("form").onsubmit = e => {
e.preventDefault();
// Parse the file and the file extension.
var input = document.querySelector("input"),
files = input.files;
if(files.length > 0) {
var file = files[0];
var ext = input.value.split("/").pop().split(".").pop();
// Send the file to the server using fetch
fetch("https://example.com/fileUpload", {
method: "POST",
headers: {
"File-Extension": "." + ext
},
body: document.querySelector("input").files[0]
})
}
}<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<form>
Upload file<input type="file">
<input type="submit" value="upload">
</form>
</body>
</html>This code sends the file extension of the file as a header, and the file contents as the body. Now on the server side, I need to process the body (which is most likely binary), and save the contents of the request body to a file with a randomly generated name ending with the file extension (supplied in the headers). I can usually use body parser for text or json, but what do I do for incoming binary data? Possibly something that returns a Buffer that contains the body?