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accept.js
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accept.js
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// 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.lookup(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;