range-slice-stream

Extract a bunch of ranges from a stream to construct a new stream

Usage

`` js
const RangeSliceStream = require('range-slice-stream')

const slicer = new RangeSliceStream()
slicer.end('abcdefghijklmnop')

const out = slicer.slice([
{ start: 1, end: 3 },
{ start: 6, end: 9 }
])

out.pipe(process.stdout)

// Prints 'bcghi'
`

API

#### var slicer = new RangeSliceStream([offset[, opts]])

Create a new slicer, which is a writable stream.

If an offset is provided, it is subtracted from all range offsets. This
makes it more intuitive to use if the incoming data stream itself starts
at an offset into an underlying resource like a file.

opts is passed to the underlying writable stream constructor.

#### var slice = slicer.slice([{start: , end: }, {start: , end: },...])

Get a new readable stream that is built by concatenating the data from one
or more byte ranges of the data piped into the slicer. Like the Buffer.slice()
method, start is inclusive and end is exclusive.

slice() can be called multiple times to generate multiple streams built from
different sets of ranges. However, all ranges must be provided in increasing
order, both within a given call to slice() and between calls.

Data between ranges is discarded. Once all ranges specified by slice() calls
are satisfied, backpressure will be applied to the incoming stream until the
next desired range is specified by calling slice() again.

#### slicer.satisfied

Boolean that is true when all slice() calls have been satisfied and
backpressure is applied. In addition, the satisfied event is emitted
when slicer.satisfied` becomes true.

License

MIT