Node.js, MongoDB, and AngularJS Web Development

Streaming File Reading

One of the best methods to use when reading large amounts of data from a file is streaming, which opens a file as a Readable stream. As discussed in Chapter 5, you can easily implement Readable streams and link them to Writable streams by using the pipe() method. This makes is very easy to read data from a file and inject it into a Writable stream source, such as an HTTP response.

To stream data from a file asynchronously, you first need to create a Readable stream object, using the following syntax:

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fs.createReadStream(path, [options])

The path parameter specifies the path to the file, which can be relative or absolute. The optional options parameter is an object that can contain encoding ...