Uploading files in Erlang and Cowboy

Question

Erlang

While developing a website in Erlang, using the Cowboy server as a basis, I encountered a problem with uploading files.
Unfortunately, I can't find a good article on the Internet on how to properly receive files sent by the client.
I tried to figure it out myself, but I was only able to get the entire POST array, parse it and select a file from the POST parameters (other POST data from the form comes with the file), but it is presented as a list and is truncated because there are too many bytes. That is, the file is truncated.
How to accept files from clients in Erlang and Cowboy?

Answer 1

<form method="POST" enctype="multipart/form-data">...

+
https://github.com/extend/cowboy/blob/master/guide...

Answer 2

Here is an example of a binary File Upload without any XML, jQuery, Base64, XHR, MIME, miltipart, using only the WebSocket channel. Speed ​​without buffers 22MB / s at 40% CPU utilization, supports resuming when the connection is broken on both sides: N2O Binary File Transfer Protocol . The technology description is here: 5ht.co/ftp.htm The issue price is 100 lines of code, the code does not depend much on N2O and can be transferred to a pure cowboy.