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| 1 | +/*! |
| 2 | + * negotiator |
| 3 | + * Copyright(c) 2012 Federico Romero |
| 4 | + * Copyright(c) 2012-2014 Isaac Z. Schlueter |
| 5 | + * Copyright(c) 2015 Douglas Christopher Wilson |
| 6 | + * MIT Licensed |
| 7 | + */ |
| 8 | + |
| 9 | +'use strict'; |
| 10 | + |
| 11 | +var preferredCharsets = require('./lib/charset') |
| 12 | +var preferredEncodings = require('./lib/encoding') |
| 13 | +var preferredLanguages = require('./lib/language') |
| 14 | +var preferredMediaTypes = require('./lib/mediaType') |
| 15 | + |
| 16 | +/** |
| 17 | + * Module exports. |
| 18 | + * @public |
| 19 | + */ |
| 20 | + |
| 21 | +module.exports = Negotiator; |
| 22 | +module.exports.Negotiator = Negotiator; |
| 23 | + |
| 24 | +/** |
| 25 | + * Create a Negotiator instance from a request. |
| 26 | + * @param {object} request |
| 27 | + * @public |
| 28 | + */ |
| 29 | + |
| 30 | +function Negotiator(request) { |
| 31 | + if (!(this instanceof Negotiator)) { |
| 32 | + return new Negotiator(request); |
| 33 | + } |
| 34 | + |
| 35 | + this.request = request; |
| 36 | +} |
| 37 | + |
| 38 | +Negotiator.prototype.charset = function charset(available) { |
| 39 | + var set = this.charsets(available); |
| 40 | + return set && set[0]; |
| 41 | +}; |
| 42 | + |
| 43 | +Negotiator.prototype.charsets = function charsets(available) { |
| 44 | + return preferredCharsets(this.request.headers['accept-charset'], available); |
| 45 | +}; |
| 46 | + |
| 47 | +Negotiator.prototype.encoding = function encoding(available, opts) { |
| 48 | + var set = this.encodings(available, opts); |
| 49 | + return set && set[0]; |
| 50 | +}; |
| 51 | + |
| 52 | +Negotiator.prototype.encodings = function encodings(available, options) { |
| 53 | + var opts = options || {}; |
| 54 | + return preferredEncodings(this.request.headers['accept-encoding'], available, opts.preferred); |
| 55 | +}; |
| 56 | + |
| 57 | +Negotiator.prototype.language = function language(available) { |
| 58 | + var set = this.languages(available); |
| 59 | + return set && set[0]; |
| 60 | +}; |
| 61 | + |
| 62 | +Negotiator.prototype.languages = function languages(available) { |
| 63 | + return preferredLanguages(this.request.headers['accept-language'], available); |
| 64 | +}; |
| 65 | + |
| 66 | +Negotiator.prototype.mediaType = function mediaType(available) { |
| 67 | + var set = this.mediaTypes(available); |
| 68 | + return set && set[0]; |
| 69 | +}; |
| 70 | + |
| 71 | +Negotiator.prototype.mediaTypes = function mediaTypes(available) { |
| 72 | + return preferredMediaTypes(this.request.headers.accept, available); |
| 73 | +}; |
| 74 | + |
| 75 | +// Backwards compatibility |
| 76 | +Negotiator.prototype.preferredCharset = Negotiator.prototype.charset; |
| 77 | +Negotiator.prototype.preferredCharsets = Negotiator.prototype.charsets; |
| 78 | +Negotiator.prototype.preferredEncoding = Negotiator.prototype.encoding; |
| 79 | +Negotiator.prototype.preferredEncodings = Negotiator.prototype.encodings; |
| 80 | +Negotiator.prototype.preferredLanguage = Negotiator.prototype.language; |
| 81 | +Negotiator.prototype.preferredLanguages = Negotiator.prototype.languages; |
| 82 | +Negotiator.prototype.preferredMediaType = Negotiator.prototype.mediaType; |
| 83 | +Negotiator.prototype.preferredMediaTypes = Negotiator.prototype.mediaTypes; |
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