While the buffer APIs are easier to use to upload and download files, the streaming APIs are a great way to better manage memory and concurrency. In this post, you'll learn how to stream files between clients, Node.js, and Oracle Database.
Overview
The streaming APIs in Node.js are designed to leverage and simplify its evented nature. There are four different stream classes: Readable, Writeable, Transform, and Duplex. Readable streams (which includes Transform and Duplex) have a method that can be thought of like the pipe command in Linux, where the standard output of one command can be piped into the standard input of another command. Here's a command line example that takes the output from the ls (list) command and pipes it through the grep (search) command to show files that have the word "oracle" in the name: