// Copyright 2012 Mark Cavage, Inc. All rights reserved. 'use strict'; var assert = require('assert-plus'); var mime = require('mime'); var NotAcceptableError = require('restify-errors').NotAcceptableError; /** * Parses the `Accept` header, and ensures that the server can respond to what * the client asked for. In almost all cases passing in `server.acceptable` is * all that's required, as that's an array of content types the server knows * how to respond to (with the formatters you've registered). If the request is * for a non-handled type, this plugin will return a `NotAcceptableError` (406). * * Note you can get the set of types allowed from a restify server by doing * `server.acceptable`. * * @public * @function acceptParser * @throws {NotAcceptableError} * @param {String[]} accepts - array of accept types. * @returns {Function} restify handler. * @example * server.use(restify.plugins.acceptParser(server.acceptable)); */ function acceptParser(accepts) { var acceptable = accepts; if (!Array.isArray(acceptable)) { acceptable = [acceptable]; } assert.arrayOfString(acceptable, 'acceptable'); acceptable = acceptable .filter(function filter(a) { return a; }) .map(function map(a) { return a.indexOf('/') === -1 ? mime.getType(a) : a; }) .filter(function filter(a) { return a; }); var e = new NotAcceptableError('Server accepts: ' + acceptable.join()); function parseAccept(req, res, next) { if (req.accepts(acceptable)) { return next(); } return next(e); } return parseAccept; } module.exports = acceptParser;