Introduction to Multistream

Multistream is a powerful feature for developers and enthusiasts looking to enhance their streaming capabilities. It allows for multiple streams of data to be handled simultaneously, offering greater flexibility and efficiency in data processing and application performance.

API Examples

Creating a Multistream

To create a simple multistream, you can use the following code:

  const { MultiStream } = require('multistream');
  
  const streamA = getReadableStreamSomehow();
  const streamB = getAnotherReadableStream();
  
  const combinedStream = MultiStream([streamA, streamB]);
  
  combinedStream.on('data', (chunk) => {
    console.log(chunk.toString());
  });

Error Handling in Multistream

Error handling is crucial to ensure that your application behaves as expected. Here’s an example:

  combinedStream.on('error', (err) => {
    console.error('Stream encountered an error: ', err);
  });

Using Multistream with Different Data Sources

Multistream can also handle streams from different data sources:

  const fs = require('fs');
  const { MultiStream } = require('multistream');
  
  const fileStream1 = fs.createReadStream('file1.txt');
  const fileStream2 = fs.createReadStream('file2.txt');
  
  const combinedFileStream = MultiStream([fileStream1, fileStream2]);
  
  combinedFileStream.pipe(process.stdout);

Pausing and Resuming Multistream

Sometimes, you may need to pause and resume streams. This is how you can do it:

  combinedFileStream.pause();
  
  setTimeout(() => {
    combinedFileStream.resume();
  }, 3000);

Application Example Using Multistream

Here’s a complete example application that uses multistream to combine data from multiple sources and output them sequentially:

  const fs = require('fs');
  const http = require('http');
  const { MultiStream } = require('multistream');
  
  http.createServer((req, res) => {
    const logStream = fs.createReadStream('/var/log/server.log');
    const requestStream = fs.createReadStream('requests.log');
    
    const combinedStream = MultiStream([logStream, requestStream]);
    combinedStream.pipe(res);
  }).listen(8080, () => {
    console.log('Server is listening on port 8080');
  });

In this example, an HTTP server combines data from two log streams and sends them to clients upon request.

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