Laravel

File I/O

Node.js File Streams

Using File Streams

Node.js file streams handle large files with readable/writable streams.

Introduction to Node.js File Streams

Node.js file streams offer an efficient way to handle large files, which might be inefficient to process in a single operation. Streams allow you to read or write data piece by piece, reducing memory usage and enhancing performance.

Types of Streams in Node.js

Node.js supports several types of streams:

  • Readable Streams: Used for reading data.
  • Writable Streams: Used for writing data.
  • Duplex Streams: Allow both reading and writing.
  • Transform Streams: A type of duplex stream where the output is computed based on input.

Creating a Readable Stream

To create a readable stream in Node.js, you can use the fs.createReadStream() method. This method is used to read data from a file in a stream format.

Creating a Writable Stream

Similarly, a writable stream can be created using fs.createWriteStream(). This is useful when you need to write data to a file in chunks.

Piping Streams

Piping is a powerful feature in Node.js streams that allows you to connect a readable stream to a writable stream. This can be extremely useful for operations like copying data from one file to another.

Handling Stream Events

Streams in Node.js are instances of EventEmitter and can emit several events. Some of the common events include:

  • data: Emitted when data is available to read.
  • end: Emitted when there is no more data to read.
  • error: Emitted if an error occurs.
  • finish: Emitted when all data has been flushed to the underlying system.

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