thunk-stream

Wrap a readable/writable/duplex/transform stream to a thunk.

thunks

Demo

const thunkStream = require('thunk-stream')
const stream = require('stream')
const fs = require('fs')
 
const readableStream = fs.createReadStream('index.js')
const passStream = new stream.PassThrough()
 
thunkStream(readableStream)(function (error) {
  if (error) console.error('error', error)
  else console.log('read file end.')
})
 
thunkStream(passStream)(function (error) {
  console.log('file pass through finished.')
})
 
readableStream.pipe(passStream)

Installation

npm install thunk-stream

API

const thunkStream = require('thunk-stream')

thunkStream(stream[, options])

Return a thunk function.

stream

Required, Type: stream, readable/writable/duplex/transform stream.

options.endEventType

Optional, Type: String or Array

Appoint one or more event types to delegate the stream end. In built end event types: ['end', 'finish', 'close', 'error'].

options.error

Optional, Type: Boolean

If true, ignore error event for stream end.

options.end

Optional, Type: Boolean

If true, ignore end event for stream end.

options.finish

Optional, Type: Boolean

If true, ignore finish event for stream end.

options.close

Optional, Type: Boolean

If true, ignore close event for stream end.

options[eventType]

Optional, Type: Boolean

If true, ignore eventType event for stream end.

thunk.clearListeners()

After thunk is called, clearListeners is added that can remove all listeners added to stream by thunkStream. if listeners has been removed already, it return false, else return true.