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How to use the createWriteStream function from fs-extra

Find comprehensive JavaScript fs-extra.createWriteStream code examples handpicked from public code repositorys.

fs-extra.createWriteStream is a method in the fs-extra library that creates a writable stream for a given file path.

applicationize.js

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function downloadFile(url, filePath) {
    // Promisify the request
    return new Promise(function (resolve, reject) {
        try {
            // Create write stream
            var stream = fs.createWriteStream(filePath);


            // Wait for finish event
            stream.on('finish', function () {
                // Resolve the promise

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socket.js

GitHub: PufferPanel/Scales

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    return;
}

Fs.ensureDirSync(server.buildPath(meta.path));

var file = Fs.createWriteStream(server.buildPath(Path.join(meta.path, meta.name)));
stream.pipe(file);

stream.on('data', function (data) {
    stream.write({rx: data.length / meta.size});

How does fs-extra.createWriteStream work?

fs-extra.createWriteStream is a method in the fs-extra library that creates a writable stream for a given file path. When you call fs.createWriteStream(path, options), the function returns a writable stream that can be used to write data to the file specified by path. The options parameter is an object that can be used to specify additional options for the stream, such as the encoding to use for the data. You can write data to the stream using the .write() method and close the stream using the .end() method. Data written to the stream is buffered until the buffer size exceeds the high water mark specified in the stream options, at which point the data is written to the file. In essence, fs-extra.createWriteStream provides a way to create a writable stream to a file, allowing you to write data to the file incrementally rather than all at once. This can be useful for writing large amounts of data to a file without having to load it all into memory at once.

tool-utils.js

GitHub: laurent22/joplin-nextcloud

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toolUtils.downloadFile = function(url, targetPath) {
	const https = require('https');
	const fs = require('fs');


	return new Promise((resolve, reject) => {
		const file = fs.createWriteStream(targetPath);
		https.get(url, function(response) {
			if (response.statusCode !== 200) reject(new Error(`HTTP error ${response.statusCode}`));
			response.pipe(file);
			file.on('finish', function() {

+ 8 other calls in file

dataset.js

GitHub: data-fair/data-fair

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if (dataset.isRest) return restDatasetsUtils.writeExtendedStreams(db, dataset)
const tmpFullFile = await tmp.tmpName({ dir: path.join(dataDir, 'tmp') })
// creating empty file before streaming seems to fix some weird bugs with NFS
await fs.ensureFile(tmpFullFile)

const writeStream = fs.createWriteStream(tmpFullFile)

const relevantSchema = dataset.schema.filter(f => !f['x-calculated'])
const transforms = []

Ai Example

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const fs = require("fs-extra");

const writeStream = fs.createWriteStream("./output.txt");

writeStream.write("Hello, world!");
writeStream.write("This is a test.");
writeStream.end();

console.log("Data written to file.");

In this example, we first import the fs-extra library. We then call fs.createWriteStream('./output.txt') to create a writable stream to the file output.txt. The function returns a WriteStream object that we can use to write data to the file. We then write two strings to the stream using the .write() method, and close the stream using the .end() method. Finally, we log a message to the console indicating that the data has been written to the file. Note that in this example, we're writing two small strings to the file, but you can write any type of data to the stream, such as binary data or large data sets.

nodejs.md?plain=1

GitHub: 5102a/My_Growth

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- fs.chmod()：更改通过传递的文件名指定的文件的权限。相关阅读：fs.lchmod()，fs.fchmod()
- fs.chown()：更改由传递的文件名指定的文件的所有者和组。相关阅读：fs.fchown()，fs.lchown()
- fs.close()：关闭文件描述符
- fs.copyFile()：复制文件
- fs.createReadStream()：创建可读的文件流
- fs.createWriteStream()：创建可写文件流
- fs.link()：创建指向文件的新硬链接
- fs.mkdir()： 新建一个文件夹
- fs.mkdtemp()：创建一个临时目录
- fs.open()：设置文件模式

+ 27 other calls in file

electron.js

GitHub: jjpps/Championify

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const file_dest = path.join(dest, entry.fileName);
const dest_dir = path.parse(file_dest).dir;
if (!fs.existsSync(dest_dir)) fs.mkdirsSync(dest_dir);

const write_stream = fs.createWriteStream(file_dest);
readStream.pipe(write_stream);
write_stream.on('finish', function() {
  if (stat.mode === 33261) exec(`chmod +x "${file_dest}"`);
  return resolve();

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+ 3 other calls in file

template.js

GitHub: wk-js/starter-nanogl

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this.emit('start')

fs.ensureDirSync( path.dirname(this.output) )

const rs = fs.createReadStream(this.input)
const ws = fs.createWriteStream(this.output)

rs.on('data', ( chunk ) => {
  chunk = Buffer.isBuffer(chunk) ? chunk.toString('utf8') : chunk
  ws.write( this.renderSource(chunk) )

upload.js

GitHub: Kunedawg/kev-bot

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// Download file from discord to a local file path
try {
  var response = await fetch(discordFileUrl);
  var readStream = response.body;
  var writeSteam = fs.createWriteStream(downloadFilePath);
  await asyncPipe(readStream, writeSteam);
  //await readStream.pipe(fs.createWriteStream(downloadFilePath));
} catch (err) {
  return reject({

+ 11 other calls in file

file_manager.js

GitHub: Cloud-V/Backend

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    };
    const readStream =
        fs.createReadStream(stdcellPath);
    readStream.on("error", done);
    const writeStream =
        fs.createWriteStream(stdCellDest);
    writeStream.on("error", done);
    writeStream.on("close", done);
    return readStream.pipe(writeStream);
}

+ 9 other calls in file

assetguard.js

GitHub: TGS-Network/TGSLauncher

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    // Adjust download
    this.totaldlsize -= asset.size
    this.totaldlsize += contentLength
}

let writeStream = fs.createWriteStream(asset.to)
writeStream.on('close', () => {
    if(dlTracker.callback != null){
        dlTracker.callback.apply(dlTracker, [asset, self])
    }

+ 6 other calls in file

s3.js

GitHub: impress-dev/HelloWorld

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if (stripKeyPath) file = basename(file);
const destination = join(path, file);

await fs.ensureDir(dirname(destination));

const writer = fs.createWriteStream(destination);

const { Body } = await s3.getObject({ Bucket, Key });

Body.pipe(writer);

getFiles.bundle.js

GitHub: changpzh/project_zhou

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  })
}

function copyFile (file, target) {
  var readStream = fs.createReadStream(file.name)
  var writeStream = fs.createWriteStream(target, { mode: file.mode })

  readStream.on('error', onError)
  writeStream.on('error', onError)

+ 17 other calls in file

core.js

GitHub: jzwood/meowvc

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}


async function _writeToDisk() {
  const streamWrite = async (fpath, data) => {
    await fs.ensureDir(path.dirname(fpath))
    const writeStream = fs.createWriteStream(fpath)
    await writeStream.write(data)
    writeStream.end()
  }

index.js

GitHub: davidmerfield/Blot

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  return fs.outputFile(join(uploadDir, "error.txt"), err.message);
}

// zip the image and send it
let archive = archiver("zip");
const resultWS = fs.createWriteStream(resultZip);

archive.on("end", () => {
  console.log(archive.pointer() + " total bytes");
  console.log("archiver finalized");

+ 4 other calls in file

middleware.js

GitHub: davidmerfield/Blot

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tmp_name = uuid() + basename(req.baseUrl + req.path);
tmp_path = join(tmp_directory, tmp_name);

// Initiate the stream to the location we'll
// write the response to this request.
stream = fs.createWriteStream(tmp_path);

// I suspect this catches an error which results when you flush the
// cache for a given site, whilst caching the response to a request to
// a page on the site. Allow a sudden, the file to which the stream

+ 7 other calls in file

imageCompare.js

GitHub: klassijs/klassi-js

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fs.ensureDirSync(diffDirNegative); // Make sure destination folder exists, if not, create it

if (error > this.expected) {
  diffFile = `${diffDirNegative}${filename}`;

  const writeStream = fs.createWriteStream(diffFile);
  await result.getDiffImage().pack().pipe(writeStream);
  writeStream.on('error', (err) => {
    console.log('this is the writeStream error ', err);
  });

mods.js

GitHub: 0neGal/viper

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		fs.rmSync(modlocation);
	}
}

// write out the file to the temporary location
let stream = fs.createWriteStream(modlocation);
res.pipe(stream);

stream.on("finish", () => {
	stream.close();

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+ 17 other calls in file

copy-file.js

GitHub: bcomnes/cpx2

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 * @private
 */
function copyFileContent(source, output, transforms) {
    return new Promise((resolve, reject) => {
        const reader = fs.createReadStream(source)
        const writer = fs.createWriteStream(output)
        const streams = [reader]


        /**
         * Clean up.

+ 8 other calls in file

update.js

GitHub: rajeshn95/locospec-demo

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  "attachment; filename=",
  ""
);

var destf = path.join("upgrade-nobejs", filename);
var dest = fs.createWriteStream(destf);

var total = parseInt(res2.headers["content-length"]);
// console.log("total", total);
var completed = 0;

+ 11 other calls in file

ptl.js

GitHub: rinie/vlm

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// https://stackoverflow.com/questions/18814221/adding-timestamps-to-all-console-messages
// https://github.com/iccicci/rotating-file-stream#readme
const logToFile = (process.argv.length > 4);
if (logToFile) { // all output to stdout?
  const logfileName = (process.argv.length > 4) ? process.argv[4] : `/opt/locus/var/log/${appName}.log`;
  const logFile = fs.createWriteStream(logfileName, { flags: 'as' });
  process.stdout.write = process.stderr.write = logFile.write.bind(logFile);
  console.error(`${appName} stderr log to file use env.SET DEBUG_COLORS=NO`);
}
// console.error(`${appName} stderr log to file`, tty.isatty(process.stderr.fd));

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