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+/*!
+ * express
+ * Copyright(c) 2009-2013 TJ Holowaychuk
+ * Copyright(c) 2014-2015 Douglas Christopher Wilson
+ * MIT Licensed
+ */
+
+'use strict';
+
+/**
+ * Module dependencies.
+ * @private
+ */
+
+var Buffer = require('safe-buffer').Buffer
+var contentDisposition = require('content-disposition');
+var deprecate = require('depd')('express');
+var encodeUrl = require('encodeurl');
+var escapeHtml = require('escape-html');
+var http = require('http');
+var isAbsolute = require('./utils').isAbsolute;
+var onFinished = require('on-finished');
+var path = require('path');
+var statuses = require('statuses')
+var merge = require('utils-merge');
+var sign = require('cookie-signature').sign;
+var normalizeType = require('./utils').normalizeType;
+var normalizeTypes = require('./utils').normalizeTypes;
+var setCharset = require('./utils').setCharset;
+var cookie = require('cookie');
+var send = require('send');
+var extname = path.extname;
+var mime = send.mime;
+var resolve = path.resolve;
+var vary = require('vary');
+
+/**
+ * Response prototype.
+ * @public
+ */
+
+var res = Object.create(http.ServerResponse.prototype)
+
+/**
+ * Module exports.
+ * @public
+ */
+
+module.exports = res
+
+/**
+ * Module variables.
+ * @private
+ */
+
+var charsetRegExp = /;\s*charset\s*=/;
+
+/**
+ * Set status `code`.
+ *
+ * @param {Number} code
+ * @return {ServerResponse}
+ * @public
+ */
+
+res.status = function status(code) {
+ this.statusCode = code;
+ return this;
+};
+
+/**
+ * Set Link header field with the given `links`.
+ *
+ * Examples:
+ *
+ * res.links({
+ * next: 'http://api.example.com/users?page=2',
+ * last: 'http://api.example.com/users?page=5'
+ * });
+ *
+ * @param {Object} links
+ * @return {ServerResponse}
+ * @public
+ */
+
+res.links = function(links){
+ var link = this.get('Link') || '';
+ if (link) link += ', ';
+ return this.set('Link', link + Object.keys(links).map(function(rel){
+ return '<' + links[rel] + '>; rel="' + rel + '"';
+ }).join(', '));
+};
+
+/**
+ * Send a response.
+ *
+ * Examples:
+ *
+ * res.send(Buffer.from('wahoo'));
+ * res.send({ some: 'json' });
+ * res.send('<p>some html</p>');
+ *
+ * @param {string|number|boolean|object|Buffer} body
+ * @public
+ */
+
+res.send = function send(body) {
+ var chunk = body;
+ var encoding;
+ 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 = statuses[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'));
+ }
+ }
+
+ // determine if ETag should be generated
+ var etagFn = app.get('etag fn')
+ var generateETag = !this.get('ETag') && typeof etagFn === 'function'
+
+ // populate Content-Length
+ var len
+ if (chunk !== undefined) {
+ if (Buffer.isBuffer(chunk)) {
+ // get length of Buffer
+ len = chunk.length
+ } else if (!generateETag && chunk.length < 1000) {
+ // just calculate length when no ETag + small chunk
+ len = Buffer.byteLength(chunk, encoding)
+ } else {
+ // convert chunk to Buffer and calculate
+ chunk = Buffer.from(chunk, encoding)
+ encoding = undefined;
+ len = chunk.length
+ }
+
+ this.set('Content-Length', len);
+ }
+
+ // populate ETag
+ var etag;
+ if (generateETag && len !== undefined) {
+ if ((etag = etagFn(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 escape = app.get('json escape')
+ var replacer = app.get('json replacer');
+ var spaces = app.get('json spaces');
+ var body = stringify(val, replacer, spaces, escape)
+
+ // 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 escape = app.get('json escape')
+ var replacer = app.get('json replacer');
+ var spaces = app.get('json spaces');
+ var body = stringify(val, replacer, spaces, escape)
+ 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.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 = statuses[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.
+ *
+ * Optionally providing an `options` object to use with `res.sendFile()`.
+ * This function will set the `Content-Disposition` header, overriding
+ * any `Content-Disposition` header passed as header options in order
+ * to set the attachment and filename.
+ *
+ * This method uses `res.sendFile()`.
+ *
+ * @public
+ */
+
+res.download = function download (path, filename, options, callback) {
+ var done = callback;
+ var name = filename;
+ var opts = options || null
+
+ // support function as second or third arg
+ if (typeof filename === 'function') {
+ done = filename;
+ name = null;
+ opts = null
+ } else if (typeof options === 'function') {
+ done = options
+ opts = null
+ }
+
+ // set Content-Disposition when file is sent
+ var headers = {
+ 'Content-Disposition': contentDisposition(name || path)
+ };
+
+ // merge user-provided headers
+ if (opts && opts.headers) {
+ var keys = Object.keys(opts.headers)
+ for (var i = 0; i < keys.length; i++) {
+ var key = keys[i]
+ if (key.toLowerCase() !== 'content-disposition') {
+ headers[key] = opts.headers[key]
+ }
+ }
+ }
+
+ // merge user-provided options
+ opts = Object.create(opts)
+ opts.headers = headers
+
+ // Resolve the full path for sendFile
+ var fullPath = resolve(path);
+
+ // send file
+ return this.sendFile(fullPath, opts, 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('<p>hey</p>');
+ * },
+ *
+ * '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('<p>hey</p>');
+ * },
+ *
+ * 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', ['<http://localhost/>', '<http://localhost:3000/>']);
+ * res.append('Set-Cookie', 'foo=bar; Path=/; HttpOnly');
+ * res.append('Warning', '199 Miscellaneous warning');
+ *
+ * @param {String} field
+ * @param {String|Array} val
+ * @return {ServerResponse} for chaining
+ * @public
+ */
+
+res.append = function append(field, val) {
+ var prev = this.get(field);
+ var value = val;
+
+ if (prev) {
+ // concat the new and prev vals
+ value = Array.isArray(prev) ? prev.concat(val)
+ : Array.isArray(val) ? [prev].concat(val)
+ : [prev, val];
+ }
+
+ return this.set(field, value);
+};
+
+/**
+ * Set header `field` to `val`, or pass
+ * an object of header fields.
+ *
+ * Examples:
+ *
+ * res.set('Foo', ['bar', 'baz']);
+ * res.set('Accept', 'application/json');
+ * res.set({ Accept: 'text/plain', 'X-API-Key': 'tobi' });
+ *
+ * Aliased as `res.header()`.
+ *
+ * @param {String|Object} field
+ * @param {String|Array} val
+ * @return {ServerResponse} for chaining
+ * @public
+ */
+
+res.set =
+res.header = function header(field, val) {
+ if (arguments.length === 2) {
+ var value = Array.isArray(val)
+ ? val.map(String)
+ : String(val);
+
+ // add charset to content-type
+ if (field.toLowerCase() === 'content-type') {
+ if (Array.isArray(value)) {
+ throw new TypeError('Content-Type cannot be set to an Array');
+ }
+ if (!charsetRegExp.test(value)) {
+ var charset = mime.charsets.lookup(value.split(';')[0]);
+ if (charset) value += '; charset=' + charset.toLowerCase();
+ }
+ }
+
+ this.setHeader(field, value);
+ } else {
+ for (var key in field) {
+ this.set(key, field[key]);
+ }
+ }
+ return this;
+};
+
+/**
+ * Get value for header `field`.
+ *
+ * @param {String} field
+ * @return {String}
+ * @public
+ */
+
+res.get = function(field){
+ return this.getHeader(field);
+};
+
+/**
+ * Clear cookie `name`.
+ *
+ * @param {String} name
+ * @param {Object} [options]
+ * @return {ServerResponse} for chaining
+ * @public
+ */
+
+res.clearCookie = function clearCookie(name, options) {
+ var opts = merge({ expires: new Date(1), path: '/' }, options);
+
+ return this.cookie(name, '', opts);
+};
+
+/**
+ * Set cookie `name` to `value`, with the given `options`.
+ *
+ * Options:
+ *
+ * - `maxAge` max-age in milliseconds, converted to `expires`
+ * - `signed` sign the cookie
+ * - `path` defaults to "/"
+ *
+ * Examples:
+ *
+ * // "Remember Me" for 15 minutes
+ * res.cookie('rememberme', '1', { expires: new Date(Date.now() + 900000), httpOnly: true });
+ *
+ * // save as above
+ * res.cookie('rememberme', '1', { maxAge: 900000, httpOnly: true })
+ *
+ * @param {String} name
+ * @param {String|Object} value
+ * @param {Object} [options]
+ * @return {ServerResponse} for chaining
+ * @public
+ */
+
+res.cookie = function (name, value, options) {
+ var opts = merge({}, options);
+ var secret = this.req.secret;
+ var signed = opts.signed;
+
+ if (signed && !secret) {
+ throw new Error('cookieParser("secret") required for signed cookies');
+ }
+
+ var val = typeof value === 'object'
+ ? 'j:' + JSON.stringify(value)
+ : String(value);
+
+ if (signed) {
+ val = 's:' + sign(val, secret);
+ }
+
+ if ('maxAge' in opts) {
+ opts.expires = new Date(Date.now() + opts.maxAge);
+ opts.maxAge /= 1000;
+ }
+
+ if (opts.path == null) {
+ opts.path = '/';
+ }
+
+ this.append('Set-Cookie', cookie.serialize(name, String(val), opts));
+
+ return this;
+};
+
+/**
+ * Set the location header to `url`.
+ *
+ * The given `url` can also be "back", which redirects
+ * to the _Referrer_ or _Referer_ headers or "/".
+ *
+ * Examples:
+ *
+ * res.location('/foo/bar').;
+ * res.location('http://example.com');
+ * res.location('../login');
+ *
+ * @param {String} url
+ * @return {ServerResponse} for chaining
+ * @public
+ */
+
+res.location = function location(url) {
+ var loc = url;
+
+ // "back" is an alias for the referrer
+ if (url === 'back') {
+ loc = this.req.get('Referrer') || '/';
+ }
+
+ // set location
+ return this.set('Location', encodeUrl(loc));
+};
+
+/**
+ * Redirect to the given `url` with optional response `status`
+ * defaulting to 302.
+ *
+ * The resulting `url` is determined by `res.location()`, so
+ * it will play nicely with mounted apps, relative paths,
+ * `"back"` etc.
+ *
+ * Examples:
+ *
+ * res.redirect('/foo/bar');
+ * res.redirect('http://example.com');
+ * res.redirect(301, 'http://example.com');
+ * res.redirect('../login'); // /blog/post/1 -> /blog/login
+ *
+ * @public
+ */
+
+res.redirect = function redirect(url) {
+ var address = url;
+ var body;
+ var status = 302;
+
+ // allow status / url
+ if (arguments.length === 2) {
+ if (typeof arguments[0] === 'number') {
+ status = arguments[0];
+ address = arguments[1];
+ } else {
+ deprecate('res.redirect(url, status): Use res.redirect(status, url) instead');
+ status = arguments[1];
+ }
+ }
+
+ // Set location header
+ address = this.location(address).get('Location');
+
+ // Support text/{plain,html} by default
+ this.format({
+ text: function(){
+ body = statuses[status] + '. Redirecting to ' + address
+ },
+
+ html: function(){
+ var u = escapeHtml(address);
+ body = '<p>' + statuses[status] + '. Redirecting to <a href="' + u + '">' + u + '</a></p>'
+ },
+
+ 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);
+}
+
+/**
+ * Stringify JSON, like JSON.stringify, but v8 optimized, with the
+ * ability to escape characters that can trigger HTML sniffing.
+ *
+ * @param {*} value
+ * @param {function} replaces
+ * @param {number} spaces
+ * @param {boolean} escape
+ * @returns {string}
+ * @private
+ */
+
+function stringify (value, replacer, spaces, escape) {
+ // v8 checks arguments.length for optimizing simple call
+ // https://bugs.chromium.org/p/v8/issues/detail?id=4730
+ var json = replacer || spaces
+ ? JSON.stringify(value, replacer, spaces)
+ : JSON.stringify(value);
+
+ if (escape) {
+ json = json.replace(/[<>&]/g, function (c) {
+ switch (c.charCodeAt(0)) {
+ case 0x3c:
+ return '\\u003c'
+ case 0x3e:
+ return '\\u003e'
+ case 0x26:
+ return '\\u0026'
+ default:
+ return c
+ }
+ })
+ }
+
+ return json
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-26 02:05:41 +0000