We cannot process an uploaded file in the same way we process other POST data. When a file input is submitted in a form, the browser processes the file into a multipart message.
Multipart was originally developed as an e-mail format allowing multiple pieces of mixed content to be combined into one message. If we attempted to receive the upload as a stream and write it to a file, we would have a file filled with multipart data instead of the file or files themselves. We need a multipart parser, the writing of which is more than a recipe can cover. So, we'll be using the well-known and battle-tested
formidable module to convert our upload data into files.
Let's create a new
uploads directory to store the uploaded ...