some html
'); + * + * @param {string|number|boolean|object|Buffer} body + * @public + */ + +res.send = function send(body) { + var chunk = body; + var encoding; + var len; + var req = this.req; + var type; + + // settings + var app = this.app; + + // allow status / body + if (arguments.length === 2) { + // res.send(body, status) backwards compat + if (typeof arguments[0] !== 'number' && typeof arguments[1] === 'number') { + deprecate('res.send(body, status): Use res.status(status).send(body) instead'); + this.statusCode = arguments[1]; + } else { + deprecate('res.send(status, body): Use res.status(status).send(body) instead'); + this.statusCode = arguments[0]; + chunk = arguments[1]; + } + } + + // disambiguate res.send(status) and res.send(status, num) + if (typeof chunk === 'number' && arguments.length === 1) { + // res.send(status) will set status message as text string + if (!this.get('Content-Type')) { + this.type('txt'); + } + + deprecate('res.send(status): Use res.sendStatus(status) instead'); + this.statusCode = chunk; + chunk = statusCodes[chunk]; + } + + switch (typeof chunk) { + // string defaulting to html + case 'string': + if (!this.get('Content-Type')) { + this.type('html'); + } + break; + case 'boolean': + case 'number': + case 'object': + if (chunk === null) { + chunk = ''; + } else if (Buffer.isBuffer(chunk)) { + if (!this.get('Content-Type')) { + this.type('bin'); + } + } else { + return this.json(chunk); + } + break; + } + + // write strings in utf-8 + if (typeof chunk === 'string') { + encoding = 'utf8'; + type = this.get('Content-Type'); + + // reflect this in content-type + if (typeof type === 'string') { + this.set('Content-Type', setCharset(type, 'utf-8')); + } + } + + // populate Content-Length + if (chunk !== undefined) { + if (!Buffer.isBuffer(chunk)) { + // convert chunk to Buffer; saves later double conversions + chunk = new Buffer(chunk, encoding); + encoding = undefined; + } + + len = chunk.length; + this.set('Content-Length', len); + } + + // populate ETag + var etag; + var generateETag = len !== undefined && app.get('etag fn'); + if (typeof generateETag === 'function' && !this.get('ETag')) { + if ((etag = generateETag(chunk, encoding))) { + this.set('ETag', etag); + } + } + + // freshness + if (req.fresh) this.statusCode = 304; + + // strip irrelevant headers + if (204 == this.statusCode || 304 == this.statusCode) { + this.removeHeader('Content-Type'); + this.removeHeader('Content-Length'); + this.removeHeader('Transfer-Encoding'); + chunk = ''; + } + + if (req.method === 'HEAD') { + // skip body for HEAD + this.end(); + } else { + // respond + this.end(chunk, encoding); + } + + return this; +}; + +/** + * Send JSON response. + * + * Examples: + * + * res.json(null); + * res.json({ user: 'tj' }); + * + * @param {string|number|boolean|object} obj + * @public + */ + +res.json = function json(obj) { + var val = obj; + + // allow status / body + if (arguments.length === 2) { + // res.json(body, status) backwards compat + if (typeof arguments[1] === 'number') { + deprecate('res.json(obj, status): Use res.status(status).json(obj) instead'); + this.statusCode = arguments[1]; + } else { + deprecate('res.json(status, obj): Use res.status(status).json(obj) instead'); + this.statusCode = arguments[0]; + val = arguments[1]; + } + } + + // settings + var app = this.app; + var replacer = app.get('json replacer'); + var spaces = app.get('json spaces'); + var body = JSON.stringify(val, replacer, spaces); + + // content-type + if (!this.get('Content-Type')) { + this.set('Content-Type', 'application/json'); + } + + return this.send(body); +}; + +/** + * Send JSON response with JSONP callback support. + * + * Examples: + * + * res.jsonp(null); + * res.jsonp({ user: 'tj' }); + * + * @param {string|number|boolean|object} obj + * @public + */ + +res.jsonp = function jsonp(obj) { + var val = obj; + + // allow status / body + if (arguments.length === 2) { + // res.json(body, status) backwards compat + if (typeof arguments[1] === 'number') { + deprecate('res.jsonp(obj, status): Use res.status(status).json(obj) instead'); + this.statusCode = arguments[1]; + } else { + deprecate('res.jsonp(status, obj): Use res.status(status).jsonp(obj) instead'); + this.statusCode = arguments[0]; + val = arguments[1]; + } + } + + // settings + var app = this.app; + var replacer = app.get('json replacer'); + var spaces = app.get('json spaces'); + var body = JSON.stringify(val, replacer, spaces); + var callback = this.req.query[app.get('jsonp callback name')]; + + // content-type + if (!this.get('Content-Type')) { + this.set('X-Content-Type-Options', 'nosniff'); + this.set('Content-Type', 'application/json'); + } + + // fixup callback + if (Array.isArray(callback)) { + callback = callback[0]; + } + + // jsonp + if (typeof callback === 'string' && callback.length !== 0) { + this.charset = 'utf-8'; + this.set('X-Content-Type-Options', 'nosniff'); + this.set('Content-Type', 'text/javascript'); + + // restrict callback charset + callback = callback.replace(/[^\[\]\w$.]/g, ''); + + // replace chars not allowed in JavaScript that are in JSON + body = body + .replace(/\u2028/g, '\\u2028') + .replace(/\u2029/g, '\\u2029'); + + // the /**/ is a specific security mitigation for "Rosetta Flash JSONP abuse" + // the typeof check is just to reduce client error noise + body = '/**/ typeof ' + callback + ' === \'function\' && ' + callback + '(' + body + ');'; + } + + return this.send(body); +}; + +/** + * Send given HTTP status code. + * + * Sets the response status to `statusCode` and the body of the + * response to the standard description from node's http.STATUS_CODES + * or the statusCode number if no description. + * + * Examples: + * + * res.sendStatus(200); + * + * @param {number} statusCode + * @public + */ + +res.sendStatus = function sendStatus(statusCode) { + var body = statusCodes[statusCode] || String(statusCode); + + this.statusCode = statusCode; + this.type('txt'); + + return this.send(body); +}; + +/** + * Transfer the file at the given `path`. + * + * Automatically sets the _Content-Type_ response header field. + * The callback `callback(err)` is invoked when the transfer is complete + * or when an error occurs. Be sure to check `res.sentHeader` + * if you wish to attempt responding, as the header and some data + * may have already been transferred. + * + * Options: + * + * - `maxAge` defaulting to 0 (can be string converted by `ms`) + * - `root` root directory for relative filenames + * - `headers` object of headers to serve with file + * - `dotfiles` serve dotfiles, defaulting to false; can be `"allow"` to send them + * + * Other options are passed along to `send`. + * + * Examples: + * + * The following example illustrates how `res.sendFile()` may + * be used as an alternative for the `static()` middleware for + * dynamic situations. The code backing `res.sendFile()` is actually + * the same code, so HTTP cache support etc is identical. + * + * app.get('/user/:uid/photos/:file', function(req, res){ + * var uid = req.params.uid + * , file = req.params.file; + * + * req.user.mayViewFilesFrom(uid, function(yes){ + * if (yes) { + * res.sendFile('/uploads/' + uid + '/' + file); + * } else { + * res.send(403, 'Sorry! you cant see that.'); + * } + * }); + * }); + * + * @public + */ + +res.sendFile = function sendFile(path, options, callback) { + var done = callback; + var req = this.req; + var res = this; + var next = req.next; + var opts = options || {}; + + if (!path) { + throw new TypeError('path argument is required to res.sendFile'); + } + + // support function as second arg + if (typeof options === 'function') { + done = options; + opts = {}; + } + + if (!opts.root && !isAbsolute(path)) { + throw new TypeError('path must be absolute or specify root to res.sendFile'); + } + + // create file stream + var pathname = encodeURI(path); + var file = send(req, pathname, opts); + + // transfer + sendfile(res, file, opts, function (err) { + if (done) return done(err); + if (err && err.code === 'EISDIR') return next(); + + // next() all but write errors + if (err && err.code !== 'ECONNABORTED' && err.syscall !== 'write') { + next(err); + } + }); +}; + +/** + * Transfer the file at the given `path`. + * + * Automatically sets the _Content-Type_ response header field. + * The callback `callback(err)` is invoked when the transfer is complete + * or when an error occurs. Be sure to check `res.sentHeader` + * if you wish to attempt responding, as the header and some data + * may have already been transferred. + * + * Options: + * + * - `maxAge` defaulting to 0 (can be string converted by `ms`) + * - `root` root directory for relative filenames + * - `headers` object of headers to serve with file + * - `dotfiles` serve dotfiles, defaulting to false; can be `"allow"` to send them + * + * Other options are passed along to `send`. + * + * Examples: + * + * The following example illustrates how `res.sendfile()` may + * be used as an alternative for the `static()` middleware for + * dynamic situations. The code backing `res.sendfile()` is actually + * the same code, so HTTP cache support etc is identical. + * + * app.get('/user/:uid/photos/:file', function(req, res){ + * var uid = req.params.uid + * , file = req.params.file; + * + * req.user.mayViewFilesFrom(uid, function(yes){ + * if (yes) { + * res.sendfile('/uploads/' + uid + '/' + file); + * } else { + * res.send(403, 'Sorry! you cant see that.'); + * } + * }); + * }); + * + * @public + */ + +res.sendfile = function (path, options, callback) { + var done = callback; + var req = this.req; + var res = this; + var next = req.next; + var opts = options || {}; + + // support function as second arg + if (typeof options === 'function') { + done = options; + opts = {}; + } + + // create file stream + var file = send(req, path, opts); + + // transfer + sendfile(res, file, opts, function (err) { + if (done) return done(err); + if (err && err.code === 'EISDIR') return next(); + + // next() all but write errors + if (err && err.code !== 'ECONNABORT' && err.syscall !== 'write') { + next(err); + } + }); +}; + +res.sendfile = deprecate.function(res.sendfile, + 'res.sendfile: Use res.sendFile instead'); + +/** + * Transfer the file at the given `path` as an attachment. + * + * Optionally providing an alternate attachment `filename`, + * and optional callback `callback(err)`. The callback is invoked + * when the data transfer is complete, or when an error has + * ocurred. Be sure to check `res.headersSent` if you plan to respond. + * + * This method uses `res.sendfile()`. + * + * @public + */ + +res.download = function download(path, filename, callback) { + var done = callback; + var name = filename; + + // support function as second arg + if (typeof filename === 'function') { + done = filename; + name = null; + } + + // set Content-Disposition when file is sent + var headers = { + 'Content-Disposition': contentDisposition(name || path) + }; + + // Resolve the full path for sendFile + var fullPath = resolve(path); + + return this.sendFile(fullPath, { headers: headers }, done); +}; + +/** + * Set _Content-Type_ response header with `type` through `mime.lookup()` + * when it does not contain "/", or set the Content-Type to `type` otherwise. + * + * Examples: + * + * res.type('.html'); + * res.type('html'); + * res.type('json'); + * res.type('application/json'); + * res.type('png'); + * + * @param {String} type + * @return {ServerResponse} for chaining + * @public + */ + +res.contentType = +res.type = function contentType(type) { + var ct = type.indexOf('/') === -1 + ? mime.lookup(type) + : type; + + return this.set('Content-Type', ct); +}; + +/** + * Respond to the Acceptable formats using an `obj` + * of mime-type callbacks. + * + * This method uses `req.accepted`, an array of + * acceptable types ordered by their quality values. + * When "Accept" is not present the _first_ callback + * is invoked, otherwise the first match is used. When + * no match is performed the server responds with + * 406 "Not Acceptable". + * + * Content-Type is set for you, however if you choose + * you may alter this within the callback using `res.type()` + * or `res.set('Content-Type', ...)`. + * + * res.format({ + * 'text/plain': function(){ + * res.send('hey'); + * }, + * + * 'text/html': function(){ + * res.send('hey
'); + * }, + * + * 'appliation/json': function(){ + * res.send({ message: 'hey' }); + * } + * }); + * + * In addition to canonicalized MIME types you may + * also use extnames mapped to these types: + * + * res.format({ + * text: function(){ + * res.send('hey'); + * }, + * + * html: function(){ + * res.send('hey
'); + * }, + * + * json: function(){ + * res.send({ message: 'hey' }); + * } + * }); + * + * By default Express passes an `Error` + * with a `.status` of 406 to `next(err)` + * if a match is not made. If you provide + * a `.default` callback it will be invoked + * instead. + * + * @param {Object} obj + * @return {ServerResponse} for chaining + * @public + */ + +res.format = function(obj){ + var req = this.req; + var next = req.next; + + var fn = obj.default; + if (fn) delete obj.default; + var keys = Object.keys(obj); + + var key = keys.length > 0 + ? req.accepts(keys) + : false; + + this.vary("Accept"); + + if (key) { + this.set('Content-Type', normalizeType(key).value); + obj[key](req, this, next); + } else if (fn) { + fn(); + } else { + var err = new Error('Not Acceptable'); + err.status = err.statusCode = 406; + err.types = normalizeTypes(keys).map(function(o){ return o.value }); + next(err); + } + + return this; +}; + +/** + * Set _Content-Disposition_ header to _attachment_ with optional `filename`. + * + * @param {String} filename + * @return {ServerResponse} + * @public + */ + +res.attachment = function attachment(filename) { + if (filename) { + this.type(extname(filename)); + } + + this.set('Content-Disposition', contentDisposition(filename)); + + return this; +}; + +/** + * Append additional header `field` with value `val`. + * + * Example: + * + * res.append('Link', ['' + statusCodes[status] + '. Redirecting to ' + u + '
'; + }, + + default: function(){ + body = ''; + } + }); + + // Respond + this.statusCode = status; + this.set('Content-Length', Buffer.byteLength(body)); + + if (this.req.method === 'HEAD') { + this.end(); + } else { + this.end(body); + } +}; + +/** + * Add `field` to Vary. If already present in the Vary set, then + * this call is simply ignored. + * + * @param {Array|String} field + * @return {ServerResponse} for chaining + * @public + */ + +res.vary = function(field){ + // checks for back-compat + if (!field || (Array.isArray(field) && !field.length)) { + deprecate('res.vary(): Provide a field name'); + return this; + } + + vary(this, field); + + return this; +}; + +/** + * Render `view` with the given `options` and optional callback `fn`. + * When a callback function is given a response will _not_ be made + * automatically, otherwise a response of _200_ and _text/html_ is given. + * + * Options: + * + * - `cache` boolean hinting to the engine it should cache + * - `filename` filename of the view being rendered + * + * @public + */ + +res.render = function render(view, options, callback) { + var app = this.req.app; + var done = callback; + var opts = options || {}; + var req = this.req; + var self = this; + + // support callback function as second arg + if (typeof options === 'function') { + done = options; + opts = {}; + } + + // merge res.locals + opts._locals = self.locals; + + // default callback to respond + done = done || function (err, str) { + if (err) return req.next(err); + self.send(str); + }; + + // render + app.render(view, opts, done); +}; + +// pipe the send file stream +function sendfile(res, file, options, callback) { + var done = false; + var streaming; + + // request aborted + function onaborted() { + if (done) return; + done = true; + + var err = new Error('Request aborted'); + err.code = 'ECONNABORTED'; + callback(err); + } + + // directory + function ondirectory() { + if (done) return; + done = true; + + var err = new Error('EISDIR, read'); + err.code = 'EISDIR'; + callback(err); + } + + // errors + function onerror(err) { + if (done) return; + done = true; + callback(err); + } + + // ended + function onend() { + if (done) return; + done = true; + callback(); + } + + // file + function onfile() { + streaming = false; + } + + // finished + function onfinish(err) { + if (err && err.code === 'ECONNRESET') return onaborted(); + if (err) return onerror(err); + if (done) return; + + setImmediate(function () { + if (streaming !== false && !done) { + onaborted(); + return; + } + + if (done) return; + done = true; + callback(); + }); + } + + // streaming + function onstream() { + streaming = true; + } + + file.on('directory', ondirectory); + file.on('end', onend); + file.on('error', onerror); + file.on('file', onfile); + file.on('stream', onstream); + onFinished(res, onfinish); + + if (options.headers) { + // set headers on successful transfer + file.on('headers', function headers(res) { + var obj = options.headers; + var keys = Object.keys(obj); + + for (var i = 0; i < keys.length; i++) { + var k = keys[i]; + res.setHeader(k, obj[k]); + } + }); + } + + // pipe + file.pipe(res); +} diff --git a/server/node_modules/express/lib/router/index.js b/server/node_modules/express/lib/router/index.js new file mode 100644 index 00000000..504ed9ce --- /dev/null +++ b/server/node_modules/express/lib/router/index.js @@ -0,0 +1,645 @@ +/*! + * express + * Copyright(c) 2009-2013 TJ Holowaychuk + * Copyright(c) 2013 Roman Shtylman + * Copyright(c) 2014-2015 Douglas Christopher Wilson + * MIT Licensed + */ + +'use strict'; + +/** + * Module dependencies. + * @private + */ + +var Route = require('./route'); +var Layer = require('./layer'); +var methods = require('methods'); +var mixin = require('utils-merge'); +var debug = require('debug')('express:router'); +var deprecate = require('depd')('express'); +var flatten = require('array-flatten'); +var parseUrl = require('parseurl'); + +/** + * Module variables. + * @private + */ + +var objectRegExp = /^\[object (\S+)\]$/; +var slice = Array.prototype.slice; +var toString = Object.prototype.toString; + +/** + * Initialize a new `Router` with the given `options`. + * + * @param {Object} options + * @return {Router} which is an callable function + * @public + */ + +var proto = module.exports = function(options) { + var opts = options || {}; + + function router(req, res, next) { + router.handle(req, res, next); + } + + // mixin Router class functions + router.__proto__ = proto; + + router.params = {}; + router._params = []; + router.caseSensitive = opts.caseSensitive; + router.mergeParams = opts.mergeParams; + router.strict = opts.strict; + router.stack = []; + + return router; +}; + +/** + * Map the given param placeholder `name`(s) to the given callback. + * + * Parameter mapping is used to provide pre-conditions to routes + * which use normalized placeholders. For example a _:user_id_ parameter + * could automatically load a user's information from the database without + * any additional code, + * + * The callback uses the same signature as middleware, the only difference + * being that the value of the placeholder is passed, in this case the _id_ + * of the user. Once the `next()` function is invoked, just like middleware + * it will continue on to execute the route, or subsequent parameter functions. + * + * Just like in middleware, you must either respond to the request or call next + * to avoid stalling the request. + * + * app.param('user_id', function(req, res, next, id){ + * User.find(id, function(err, user){ + * if (err) { + * return next(err); + * } else if (!user) { + * return next(new Error('failed to load user')); + * } + * req.user = user; + * next(); + * }); + * }); + * + * @param {String} name + * @param {Function} fn + * @return {app} for chaining + * @public + */ + +proto.param = function param(name, fn) { + // param logic + if (typeof name === 'function') { + deprecate('router.param(fn): Refactor to use path params'); + this._params.push(name); + return; + } + + // apply param functions + var params = this._params; + var len = params.length; + var ret; + + if (name[0] === ':') { + deprecate('router.param(' + JSON.stringify(name) + ', fn): Use router.param(' + JSON.stringify(name.substr(1)) + ', fn) instead'); + name = name.substr(1); + } + + for (var i = 0; i < len; ++i) { + if (ret = params[i](name, fn)) { + fn = ret; + } + } + + // ensure we end up with a + // middleware function + if ('function' != typeof fn) { + throw new Error('invalid param() call for ' + name + ', got ' + fn); + } + + (this.params[name] = this.params[name] || []).push(fn); + return this; +}; + +/** + * Dispatch a req, res into the router. + * @private + */ + +proto.handle = function handle(req, res, out) { + var self = this; + + debug('dispatching %s %s', req.method, req.url); + + var search = 1 + req.url.indexOf('?'); + var pathlength = search ? search - 1 : req.url.length; + var fqdn = req.url[0] !== '/' && 1 + req.url.substr(0, pathlength).indexOf('://'); + var protohost = fqdn ? req.url.substr(0, req.url.indexOf('/', 2 + fqdn)) : ''; + var idx = 0; + var removed = ''; + var slashAdded = false; + var paramcalled = {}; + + // store options for OPTIONS request + // only used if OPTIONS request + var options = []; + + // middleware and routes + var stack = self.stack; + + // manage inter-router variables + var parentParams = req.params; + var parentUrl = req.baseUrl || ''; + var done = restore(out, req, 'baseUrl', 'next', 'params'); + + // setup next layer + req.next = next; + + // for options requests, respond with a default if nothing else responds + if (req.method === 'OPTIONS') { + done = wrap(done, function(old, err) { + if (err || options.length === 0) return old(err); + sendOptionsResponse(res, options, old); + }); + } + + // setup basic req values + req.baseUrl = parentUrl; + req.originalUrl = req.originalUrl || req.url; + + next(); + + function next(err) { + var layerError = err === 'route' + ? null + : err; + + // remove added slash + if (slashAdded) { + req.url = req.url.substr(1); + slashAdded = false; + } + + // restore altered req.url + if (removed.length !== 0) { + req.baseUrl = parentUrl; + req.url = protohost + removed + req.url.substr(protohost.length); + removed = ''; + } + + // no more matching layers + if (idx >= stack.length) { + setImmediate(done, layerError); + return; + } + + // get pathname of request + var path = getPathname(req); + + if (path == null) { + return done(layerError); + } + + // find next matching layer + var layer; + var match; + var route; + + while (match !== true && idx < stack.length) { + layer = stack[idx++]; + match = matchLayer(layer, path); + route = layer.route; + + if (typeof match !== 'boolean') { + // hold on to layerError + layerError = layerError || match; + } + + if (match !== true) { + continue; + } + + if (!route) { + // process non-route handlers normally + continue; + } + + if (layerError) { + // routes do not match with a pending error + match = false; + continue; + } + + var method = req.method; + var has_method = route._handles_method(method); + + // build up automatic options response + if (!has_method && method === 'OPTIONS') { + appendMethods(options, route._options()); + } + + // don't even bother matching route + if (!has_method && method !== 'HEAD') { + match = false; + continue; + } + } + + // no match + if (match !== true) { + return done(layerError); + } + + // store route for dispatch on change + if (route) { + req.route = route; + } + + // Capture one-time layer values + req.params = self.mergeParams + ? mergeParams(layer.params, parentParams) + : layer.params; + var layerPath = layer.path; + + // this should be done for the layer + self.process_params(layer, paramcalled, req, res, function (err) { + if (err) { + return next(layerError || err); + } + + if (route) { + return layer.handle_request(req, res, next); + } + + trim_prefix(layer, layerError, layerPath, path); + }); + } + + function trim_prefix(layer, layerError, layerPath, path) { + var c = path[layerPath.length]; + if (c && '/' !== c && '.' !== c) return next(layerError); + + // Trim off the part of the url that matches the route + // middleware (.use stuff) needs to have the path stripped + if (layerPath.length !== 0) { + debug('trim prefix (%s) from url %s', layerPath, req.url); + removed = layerPath; + req.url = protohost + req.url.substr(protohost.length + removed.length); + + // Ensure leading slash + if (!fqdn && req.url[0] !== '/') { + req.url = '/' + req.url; + slashAdded = true; + } + + // Setup base URL (no trailing slash) + req.baseUrl = parentUrl + (removed[removed.length - 1] === '/' + ? removed.substring(0, removed.length - 1) + : removed); + } + + debug('%s %s : %s', layer.name, layerPath, req.originalUrl); + + if (layerError) { + layer.handle_error(layerError, req, res, next); + } else { + layer.handle_request(req, res, next); + } + } +}; + +/** + * Process any parameters for the layer. + * @private + */ + +proto.process_params = function process_params(layer, called, req, res, done) { + var params = this.params; + + // captured parameters from the layer, keys and values + var keys = layer.keys; + + // fast track + if (!keys || keys.length === 0) { + return done(); + } + + var i = 0; + var name; + var paramIndex = 0; + var key; + var paramVal; + var paramCallbacks; + var paramCalled; + + // process params in order + // param callbacks can be async + function param(err) { + if (err) { + return done(err); + } + + if (i >= keys.length ) { + return done(); + } + + paramIndex = 0; + key = keys[i++]; + + if (!key) { + return done(); + } + + name = key.name; + paramVal = req.params[name]; + paramCallbacks = params[name]; + paramCalled = called[name]; + + if (paramVal === undefined || !paramCallbacks) { + return param(); + } + + // param previously called with same value or error occurred + if (paramCalled && (paramCalled.match === paramVal + || (paramCalled.error && paramCalled.error !== 'route'))) { + // restore value + req.params[name] = paramCalled.value; + + // next param + return param(paramCalled.error); + } + + called[name] = paramCalled = { + error: null, + match: paramVal, + value: paramVal + }; + + paramCallback(); + } + + // single param callbacks + function paramCallback(err) { + var fn = paramCallbacks[paramIndex++]; + + // store updated value + paramCalled.value = req.params[key.name]; + + if (err) { + // store error + paramCalled.error = err; + param(err); + return; + } + + if (!fn) return param(); + + try { + fn(req, res, paramCallback, paramVal, key.name); + } catch (e) { + paramCallback(e); + } + } + + param(); +}; + +/** + * Use the given middleware function, with optional path, defaulting to "/". + * + * Use (like `.all`) will run for any http METHOD, but it will not add + * handlers for those methods so OPTIONS requests will not consider `.use` + * functions even if they could respond. + * + * The other difference is that _route_ path is stripped and not visible + * to the handler function. The main effect of this feature is that mounted + * handlers can operate without any code changes regardless of the "prefix" + * pathname. + * + * @public + */ + +proto.use = function use(fn) { + var offset = 0; + var path = '/'; + + // default path to '/' + // disambiguate router.use([fn]) + if (typeof fn !== 'function') { + var arg = fn; + + while (Array.isArray(arg) && arg.length !== 0) { + arg = arg[0]; + } + + // first arg is the path + if (typeof arg !== 'function') { + offset = 1; + path = fn; + } + } + + var callbacks = flatten(slice.call(arguments, offset)); + + if (callbacks.length === 0) { + throw new TypeError('Router.use() requires middleware functions'); + } + + for (var i = 0; i < callbacks.length; i++) { + var fn = callbacks[i]; + + if (typeof fn !== 'function') { + throw new TypeError('Router.use() requires middleware function but got a ' + gettype(fn)); + } + + // add the middleware + debug('use %s %s', path, fn.name || '