1/*!
 2 * Connect - static
 3 * Copyright(c) 2010 Sencha Inc.
 4 * Copyright(c) 2011 TJ Holowaychuk
 5 * MIT Licensed
 6 */
 7
 8/**
 9 * Module dependencies.
10 */
11
12var send = require('send')
13  , utils = require('../utils')
14  , parse = utils.parseUrl
15  , url = require('url');
16
17/**
18 * Static:
19 *
20 *   Static file server with the given `root` path.
21 *
22 * Examples:
23 *
24 *     var oneDay = 86400000;
25 *
26 *     connect()
27 *       .use(connect.static(__dirname + '/public'))
28 *
29 *     connect()
30 *       .use(connect.static(__dirname + '/public', { maxAge: oneDay }))
31 *
32 * Options:
33 *
34 *    - `maxAge`     Browser cache maxAge in milliseconds. defaults to 0
35 *    - `hidden`     Allow transfer of hidden files. defaults to false
36 *    - `redirect`   Redirect to trailing "/" when the pathname is a dir. defaults to true
37 *    - `index`      Default file name, defaults to 'index.html'
38 *
39 * @param {String} root
40 * @param {Object} options
41 * @return {Function}
42 * @api public
43 */
44
45exports = module.exports = function(root, options){
46  options = options || {};
47
48  // root required
49  if (!root) throw new Error('static() root path required');
50
51  // default redirect
52  var redirect = false !== options.redirect;
53
54  return function static(req, res, next) {
55    if ('GET' != req.method && 'HEAD' != req.method) return next();
56    var path = parse(req).pathname;
57    var pause = utils.pause(req);
58
59    function resume() {
60      next();
61      pause.resume();
62    }
63
64    function directory() {
65      if (!redirect) return resume();
66      var pathname = url.parse(req.originalUrl).pathname;
67      res.statusCode = 301;
68      res.setHeader('Location', pathname + '/');
69      res.end('Redirecting to ' + utils.escape(pathname) + '/');
70    }
71
72    function error(err) {
73      if (404 == err.status) return resume();
74      next(err);
75    }
76
77    send(req, path)
78      .maxage(options.maxAge || 0)
79      .root(root)
80      .index(options.index || 'index.html')
81      .hidden(options.hidden)
82      .on('error', error)
83      .on('directory', directory)
84      .pipe(res);
85  };
86};
87
88/**
89 * Expose mime module.
90 *
91 * If you wish to extend the mime table use this
92 * reference to the "mime" module in the npm registry.
93 */
94
95exports.mime = send.mime;