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http-range

v1.0.0

Published

Node.js parser for Content-Range and Range HTTP/1.1 header fields.

Downloads

7,940

Readme

http-range

Node.js parser for Content-Range and Range HTTP header fields according to the HTTP/1.1 specifications.

Build Status

Installation

$ npm install http-range

Usage

var ContentRange = require('http-range').ContentRange;
var Range = require('http-range').Range;

// Parsing and creating 'Content-Range' header
ContentRange.prototype.parse('bytes 0-49/50');  // Content-Range: bytes 0-49/50
new ContentRange('bytes', '0-49', 50).toString(); // => bytes 0-49/50

// Parsing and creating 'Range' header
Range.prototype.parse('bytes=0-49');  // Range: bytes=0-49
new Range('bytes', '0-49'); // => bytes=0-49

For more usages check the test files.

API

ContentRange Class

new ContentRange(unit, range, length)
  • unit {String} Usually 'bytes', but can be any token
  • range {RangeSpec|String} A RangeSpec instance, a string like '0-49' or '*' if unknown
  • length {Number|'*'} The total length of the full entity-body or '*' if this length is unknown or difficult to determine

Throws error if arguments are invalid.

Properties
  • unit {String}
  • range {RangeSpec}
  • length {Number|null} Null if unknown
Methods
  • toString() Return a valid string value
  • parse(input) Parse an input string. Throws error if invalid

Allowed Content-Range(s)

  • Content-Range: bytes 0-49/50
  • Content-Range: bytes 0-49/*
  • Content-Range: bytes */50
  • Content-Range: bytes */*

Range Class

new Range(unit, ranges)
  • unit {String} Usually 'bytes', but can be any token
  • ranges {RangeSpec[]|String} An array of RangeSpec instances or a string like '0-49[,50-99][...]'

Throws error if arguments are invalid.

Properties
Methods
  • toString() Return a valid string value
  • parse(input) Parse an input string. Throws error if invalid

Allowed Range(s)

  • Range: bytes=0-49
  • Range: bytes=0-49,50-99,-30
  • Range: bytes=1-
  • Range: bytes=-50

RangeSpec Class

new RangeSpec(low, high, size)
  • low {Number|undefined}
  • high {Number|undefined}
  • size {Number|undefined} For validation only, optional

Throws error if arguments are invalid.

Properties
  • low {Number|undefined}
  • high {Number|undefined}
Methods
  • toString() Return a valid string value
  • parse(input) Parse an input string. Throws error if invalid

Examples of valid ranges

  • *
  • 0-49
  • -49
  • 34-

Tests

$ make test