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85 lines
2.2 KiB
Markdown
85 lines
2.2 KiB
Markdown
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# range-parser
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[![NPM Version][npm-version-image]][npm-url]
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[![NPM Downloads][npm-downloads-image]][npm-url]
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[![Node.js Version][node-image]][node-url]
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[![Build Status][travis-image]][travis-url]
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[![Test Coverage][coveralls-image]][coveralls-url]
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Range header field parser.
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## Installation
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This is a [Node.js](https://nodejs.org/en/) module available through the
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[npm registry](https://www.npmjs.com/). Installation is done using the
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[`npm install` command](https://docs.npmjs.com/getting-started/installing-npm-packages-locally):
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```sh
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$ npm install range-parser
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```
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## API
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<!-- eslint-disable no-unused-vars -->
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```js
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var parseRange = require('range-parser')
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```
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### parseRange(size, header, options)
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Parse the given `header` string where `size` is the maximum size of the resource.
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An array of ranges will be returned or negative numbers indicating an error parsing.
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* `-2` signals a malformed header string
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* `-1` signals an unsatisfiable range
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<!-- eslint-disable no-undef -->
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```js
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// parse header from request
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var range = parseRange(size, req.headers.range)
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// the type of the range
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if (range.type === 'bytes') {
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// the ranges
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range.forEach(function (r) {
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// do something with r.start and r.end
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})
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}
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```
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#### Options
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These properties are accepted in the options object.
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##### combine
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Specifies if overlapping & adjacent ranges should be combined, defaults to `false`.
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When `true`, ranges will be combined and returned as if they were specified that
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way in the header.
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<!-- eslint-disable no-undef -->
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```js
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parseRange(100, 'bytes=50-55,0-10,5-10,56-60', { combine: true })
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// => [
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// { start: 0, end: 10 },
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// { start: 50, end: 60 }
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// ]
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```
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## License
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[MIT](LICENSE)
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[coveralls-image]: https://badgen.net/coveralls/c/github/jshttp/range-parser/master
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[coveralls-url]: https://coveralls.io/r/jshttp/range-parser?branch=master
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[node-image]: https://badgen.net/npm/node/range-parser
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[node-url]: https://nodejs.org/en/download
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[npm-downloads-image]: https://badgen.net/npm/dm/range-parser
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[npm-url]: https://npmjs.org/package/range-parser
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[npm-version-image]: https://badgen.net/npm/v/range-parser
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[travis-image]: https://badgen.net/travis/jshttp/range-parser/master
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[travis-url]: https://travis-ci.org/jshttp/range-parser
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