How to use the createWriteStream function from temp

temp.createWriteStream is a function that creates a writable stream to a temporary file in Node.js.

How does temp.createWriteStream work?

temp.createWriteStream works by creating a new temporary file on the file system using the temp module in Node.js.

The function returns a writable stream object that can be used to write data to the temporary file.

When the writable stream is closed or the Node.js process exits, the temporary file is automatically deleted from the file system.

This can be useful for situations where you need to write temporary data to disk, such as during file uploads or processing large data sets.

By using temporary files, you can avoid filling up the file system with unnecessary data and ensure that sensitive information is not left behind on the disk.

Ai Example

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
const temp = require("temp").track();
const fs = require("fs");

// Create a writable stream to a temporary file
const writeStream = temp.createWriteStream();

// Write some data to the stream
writeStream.write("Hello, world!");
writeStream.write("How are you today?");
writeStream.end();

// When the stream is closed, read the data from the temporary file
writeStream.on("close", () => {
  const filePath = writeStream.path;
  const data = fs.readFileSync(filePath, "utf-8");
  console.log("Data from temporary file:", data);
});

In this example, we use the temp module to track temporary files and create a writable stream to a temporary file using temp.createWriteStream. We then write some data to the stream using the write method and close the stream using the end method. When the stream is closed, the 'close' event is emitted, allowing us to read the data from the temporary file using fs.readFileSync. The resulting data is printed to the console, demonstrating how temporary files can be used to store data temporarily and then automatically cleaned up when no longer needed.