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Diffstat (limited to 'middleware/node_modules/accepts/index.js')
| -rw-r--r-- | middleware/node_modules/accepts/index.js | 238 |
1 files changed, 238 insertions, 0 deletions
diff --git a/middleware/node_modules/accepts/index.js b/middleware/node_modules/accepts/index.js new file mode 100644 index 0000000..e9b2f63 --- /dev/null +++ b/middleware/node_modules/accepts/index.js @@ -0,0 +1,238 @@ +/*! + * accepts + * Copyright(c) 2014 Jonathan Ong + * Copyright(c) 2015 Douglas Christopher Wilson + * MIT Licensed + */ + +'use strict' + +/** + * Module dependencies. + * @private + */ + +var Negotiator = require('negotiator') +var mime = require('mime-types') + +/** + * Module exports. + * @public + */ + +module.exports = Accepts + +/** + * Create a new Accepts object for the given req. + * + * @param {object} req + * @public + */ + +function Accepts (req) { + if (!(this instanceof Accepts)) { + return new Accepts(req) + } + + this.headers = req.headers + this.negotiator = new Negotiator(req) +} + +/** + * Check if the given `type(s)` is acceptable, returning + * the best match when true, otherwise `undefined`, in which + * case you should respond with 406 "Not Acceptable". + * + * The `type` value may be a single mime type string + * such as "application/json", the extension name + * such as "json" or an array `["json", "html", "text/plain"]`. When a list + * or array is given the _best_ match, if any is returned. + * + * Examples: + * + * // Accept: text/html + * this.types('html'); + * // => "html" + * + * // Accept: text/*, application/json + * this.types('html'); + * // => "html" + * this.types('text/html'); + * // => "text/html" + * this.types('json', 'text'); + * // => "json" + * this.types('application/json'); + * // => "application/json" + * + * // Accept: text/*, application/json + * this.types('image/png'); + * this.types('png'); + * // => undefined + * + * // Accept: text/*;q=.5, application/json + * this.types(['html', 'json']); + * this.types('html', 'json'); + * // => "json" + * + * @param {String|Array} types... + * @return {String|Array|Boolean} + * @public + */ + +Accepts.prototype.type = +Accepts.prototype.types = function (types_) { + var types = types_ + + // support flattened arguments + if (types && !Array.isArray(types)) { + types = new Array(arguments.length) + for (var i = 0; i < types.length; i++) { + types[i] = arguments[i] + } + } + + // no types, return all requested types + if (!types || types.length === 0) { + return this.negotiator.mediaTypes() + } + + // no accept header, return first given type + if (!this.headers.accept) { + return types[0] + } + + var mimes = types.map(extToMime) + var accepts = this.negotiator.mediaTypes(mimes.filter(validMime)) + var first = accepts[0] + + return first + ? types[mimes.indexOf(first)] + : false +} + +/** + * Return accepted encodings or best fit based on `encodings`. + * + * Given `Accept-Encoding: gzip, deflate` + * an array sorted by quality is returned: + * + * ['gzip', 'deflate'] + * + * @param {String|Array} encodings... + * @return {String|Array} + * @public + */ + +Accepts.prototype.encoding = +Accepts.prototype.encodings = function (encodings_) { + var encodings = encodings_ + + // support flattened arguments + if (encodings && !Array.isArray(encodings)) { + encodings = new Array(arguments.length) + for (var i = 0; i < encodings.length; i++) { + encodings[i] = arguments[i] + } + } + + // no encodings, return all requested encodings + if (!encodings || encodings.length === 0) { + return this.negotiator.encodings() + } + + return this.negotiator.encodings(encodings)[0] || false +} + +/** + * Return accepted charsets or best fit based on `charsets`. + * + * Given `Accept-Charset: utf-8, iso-8859-1;q=0.2, utf-7;q=0.5` + * an array sorted by quality is returned: + * + * ['utf-8', 'utf-7', 'iso-8859-1'] + * + * @param {String|Array} charsets... + * @return {String|Array} + * @public + */ + +Accepts.prototype.charset = +Accepts.prototype.charsets = function (charsets_) { + var charsets = charsets_ + + // support flattened arguments + if (charsets && !Array.isArray(charsets)) { + charsets = new Array(arguments.length) + for (var i = 0; i < charsets.length; i++) { + charsets[i] = arguments[i] + } + } + + // no charsets, return all requested charsets + if (!charsets || charsets.length === 0) { + return this.negotiator.charsets() + } + + return this.negotiator.charsets(charsets)[0] || false +} + +/** + * Return accepted languages or best fit based on `langs`. + * + * Given `Accept-Language: en;q=0.8, es, pt` + * an array sorted by quality is returned: + * + * ['es', 'pt', 'en'] + * + * @param {String|Array} langs... + * @return {Array|String} + * @public + */ + +Accepts.prototype.lang = +Accepts.prototype.langs = +Accepts.prototype.language = +Accepts.prototype.languages = function (languages_) { + var languages = languages_ + + // support flattened arguments + if (languages && !Array.isArray(languages)) { + languages = new Array(arguments.length) + for (var i = 0; i < languages.length; i++) { + languages[i] = arguments[i] + } + } + + // no languages, return all requested languages + if (!languages || languages.length === 0) { + return this.negotiator.languages() + } + + return this.negotiator.languages(languages)[0] || false +} + +/** + * Convert extnames to mime. + * + * @param {String} type + * @return {String} + * @private + */ + +function extToMime (type) { + return type.indexOf('/') === -1 + ? mime.lookup(type) + : type +} + +/** + * Check if mime is valid. + * + * @param {String} type + * @return {String} + * @private + */ + +function validMime (type) { + return typeof type === 'string' +} |