Node JS - Streams



Streams are the continuous flow of data, It is suitable for large size data transmission between client and server.

Unlike Buffer, Streams does not hold the entire data into the memory, instead it divides the data into multiple smaller data sets called chunks.


And transmits the chunk in a continuous order . It reduces the load from the server. There are different types of streams

Read : Used for reading the stream

Write : Used for writing the stream

Duplex : Used to perform both read and write

Transform : Similar to duplex, but in this the stream can be transform or manipulated, if required and and perform either read or write operation


Example:


const fs = require("fs");
const http = require("http");

http
  .createServer((req, res) => {
    
    fs.createReadStream(__filename)
      .pipe(res)
      .on("error", () => console.log("error reported"));
  })
  .listen(3000, () => console.log("Connected!!"));