range-parser

Range header field parser.

# Installation

This is a Node.js module available through the npm registry. Installation is done using the `npm install` command:

$ npm install range-parser

# API

var parseRange = require('range-parser')

## parseRange(size, header, options)

Parse the given `header` string where `size` is the maximum size of the resource. An array of ranges will be returned or negative numbers indicating an error parsing.

- `-2` signals a malformed header string
- `-1` signals an unsatisfiable range

// parse header from request
var range = parseRange(size, req.headers.range)
// the type of the range
if (range.type === 'bytes') {
// the ranges
range.forEach(function (r) {
// do something with r.start and r.end
})
}

### Options

These properties are accepted in the options object.

#### combine

Specifies if overlapping & adjacent ranges should be combined, defaults to `false`. When `true`, ranges will be combined and returned as if they were specified that way in the header.

parseRange(100, 'bytes=50-55,0-10,5-10,56-60', { combine: true })
// => [
// { start: 0, end: 10 },
// { start: 50, end: 60 }
// ]

# License

[MIT](LICENSE)