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stream in node.js

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Shirshak Kandel answered on July 21, 2020 Popularity 10/10 Helpfulness 2/10

answer stream in node.js

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stream in node.js

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streams is process(read and write) data piece(chunks) without completing the
whole read or write operation, and therefore without keeping all the data in 
memory.
There are four types of streams => readable streams, writable streams, duplex
and transform streams.

Popularity 10/10 Helpfulness 2/10 Language typescript

Source: Grepper

Tags: node.js stream typescript

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Contributed on Oct 10 2022

Shirshak Kandel

0 Answers Avg Quality 2/10

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nodejs create stream

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const { Readable } = require("stream")

const readable = Readable.from(["input string"])

readable.on("data", (chunk) => {
  console.log(chunk) // will be called once with `"input string"`
})

Popularity 10/10 Helpfulness 3/10 Language javascript

Source: stackoverflow.com

Tags: javascript j

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Contributed on Jul 21 2020

North Bear

0 Answers Avg Quality 2/10

nodejs file stream

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import { WriteStream, createWriteStream } from 'fs'
import path from 'path'
import { Stream } from 'stream'
import consola from 'consola'

import { ConfigsEnvironment } from '~/configs/config.env'
import { IUser } from '~/interfaces/interface.users'

export const fileStream = (chunk: Buffer, user: IUser): void => {
	const now: Date = new Date()

	const year: number = now.getFullYear()
	const month: string = ('0' + (now.getMonth() + 1)).slice(-2)
	const day: string = ('0' + now.getDate()).slice(-2)
	const hour: string = ('0' + now.getHours()).slice(-2)
	const minute: string = ('0' + now.getMinutes()).slice(-2)
	const second: string = ('0' + now.getSeconds()).slice(-2)
	const milliseconds: number = now.getMilliseconds()

	const fileName: string = `img_web_${user.userId}_${year}${month}${day}_1707${hour}${minute}${second}${milliseconds}.jpg`
	const fileWriteStream: WriteStream = createWriteStream(path.resolve(ConfigsEnvironment.STORAGE_DIR, fileName))

	const fileStream: Stream = new Stream()
	fileStream.pipe<NodeJS.WritableStream> = (dest: NodeJS.WritableStream) => {
		dest.write(chunk)
		return dest
	}
	fileStream
		.pipe(fileWriteStream)
		.on('pipe', () => {
			consola.info('File process to recreate')
		})
		.on('error', (err: Error) => {
			consola.error('File error to recreate')
			Promise.reject(err)
		})
		.on('finish', () => {
			console.info('File finish to recreate')
		})
}

Popularity 8/10 Helpfulness 2/10 Language typescript

Source: Grepper

Tags: file stream stre

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Contributed on Feb 08 2024

Restu Wahyu Saputra

0 Answers Avg Quality 2/10

streami node js

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const fs = require('fs');
const r = fs.createReadStream('file.txt');
const z = zlib.createGzip();
const w = fs.createWriteStream('file.txt.gz');
r.pipe(z).pipe(w);

Popularity 10/10 Helpfulness 2/10 Language javascript

Source: nodejs.org

Tags: javascript j

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Contributed on Dec 16 2020

Homely Hamster

0 Answers Avg Quality 2/10

nodejs file stream

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import { Stream } from 'stream'
import { WriteStream, createWriteStream } from 'fs'
import path from 'path'

import { ConfigsEnvironment } from '~/configs/config.env'
import { IUser } from '~/interfaces/interface.users'

export const fileStream = (chunk: Buffer, user: IUser): Promise<string> => {
	return new Promise((resolve: (value: string | PromiseLike<string>) => void, reject: (reason?: any) => void) => {
		const now: Date = new Date()

		const year: number = now.getFullYear()
		const month: string = ('0' + (now.getMonth() + 1)).slice(-2)
		const day: string = ('0' + now.getDate()).slice(-2)
		const hour: string = ('0' + now.getHours()).slice(-2)
		const minute: string = ('0' + now.getMinutes()).slice(-2)
		const second: string = ('0' + now.getSeconds()).slice(-2)
		const milliseconds: number = now.getMilliseconds()

		const fileName: string = `img_web_${user.userId}_${year}${month}${day}_1707${hour}${minute}${second}${milliseconds}.jpg`
		const writeStream: WriteStream = createWriteStream(path.resolve(ConfigsEnvironment.STORAGE_DIR, fileName))

		const stream: Stream = new Stream()
		stream.pipe<NodeJS.WritableStream> = (destination: NodeJS.WritableStream) => {
			destination.write(chunk)
			return destination
		}

		stream.pipe(writeStream).on('error', reject).end()
		writeStream.on('error', reject).end(() => resolve(fileName))
	})
}

Popularity 8/10 Helpfulness 1/10 Language typescript

Source: Grepper

Tags: file stream str

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Contributed on Feb 09 2024

Restu Wahyu Saputra

0 Answers Avg Quality 2/10

stream in node.js

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