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+/*!
+ * serve-index
+ * Copyright(c) 2011 Sencha Inc.
+ * Copyright(c) 2011 TJ Holowaychuk
+ * Copyright(c) 2014 Douglas Christopher Wilson
+ * MIT Licensed
+ */
+
+// TODO: arrow key navigation
+// TODO: make icons extensible
+
+/**
+ * Module dependencies.
+ */
+
+var accepts = require('accepts');
+var createError = require('http-errors');
+var debug = require('debug')('serve-index');
+var fs = require('fs')
+ , path = require('path')
+ , normalize = path.normalize
+ , sep = path.sep
+ , extname = path.extname
+ , join = path.join;
+var Batch = require('batch');
+var mime = require('mime-types');
+var parseUrl = require('parseurl');
+var resolve = require('path').resolve;
+
+/*!
+ * Icon cache.
+ */
+
+var cache = {};
+
+/*!
+ * Default template.
+ */
+
+var defaultTemplate = join(__dirname, 'public', 'directory.html');
+
+/*!
+ * Stylesheet.
+ */
+
+var defaultStylesheet = join(__dirname, 'public', 'style.css');
+
+/**
+ * Media types and the map for content negotiation.
+ */
+
+var mediaTypes = [
+ 'text/html',
+ 'text/plain',
+ 'application/json'
+];
+
+var mediaType = {
+ 'text/html': 'html',
+ 'text/plain': 'plain',
+ 'application/json': 'json'
+};
+
+/**
+ * Serve directory listings with the given `root` path.
+ *
+ * See Readme.md for documentation of options.
+ *
+ * @param {String} path
+ * @param {Object} options
+ * @return {Function} middleware
+ * @api public
+ */
+
+exports = module.exports = function serveIndex(root, options){
+ options = options || {};
+
+ // root required
+ if (!root) throw new TypeError('serveIndex() root path required');
+
+ // resolve root to absolute and normalize
+ root = resolve(root);
+ root = normalize(root + sep);
+
+ var hidden = options.hidden
+ , icons = options.icons
+ , view = options.view || 'tiles'
+ , filter = options.filter
+ , template = options.template || defaultTemplate
+ , stylesheet = options.stylesheet || defaultStylesheet;
+
+ return function serveIndex(req, res, next) {
+ if (req.method !== 'GET' && req.method !== 'HEAD') {
+ res.statusCode = 'OPTIONS' === req.method
+ ? 200
+ : 405;
+ res.setHeader('Allow', 'GET, HEAD, OPTIONS');
+ res.end();
+ return;
+ }
+
+ // parse URLs
+ var url = parseUrl(req);
+ var originalUrl = parseUrl.original(req);
+ var dir = decodeURIComponent(url.pathname);
+ var originalDir = decodeURIComponent(originalUrl.pathname);
+
+ // join / normalize from root dir
+ var path = normalize(join(root, dir));
+
+ // null byte(s), bad request
+ if (~path.indexOf('\0')) return next(createError(400));
+
+ // malicious path
+ if ((path + sep).substr(0, root.length) !== root) {
+ debug('malicious path "%s"', path);
+ return next(createError(403));
+ }
+
+ // determine ".." display
+ var showUp = normalize(resolve(path) + sep) !== root;
+
+ // check if we have a directory
+ debug('stat "%s"', path);
+ fs.stat(path, function(err, stat){
+ if (err && err.code === 'ENOENT') {
+ return next();
+ }
+
+ if (err) {
+ err.status = err.code === 'ENAMETOOLONG'
+ ? 414
+ : 500;
+ return next(err);
+ }
+
+ if (!stat.isDirectory()) return next();
+
+ // fetch files
+ debug('readdir "%s"', path);
+ fs.readdir(path, function(err, files){
+ if (err) return next(err);
+ if (!hidden) files = removeHidden(files);
+ if (filter) files = files.filter(function(filename, index, list) {
+ return filter(filename, index, list, path);
+ });
+ files.sort();
+
+ // content-negotiation
+ var accept = accepts(req);
+ var type = accept.type(mediaTypes);
+
+ // not acceptable
+ if (!type) return next(createError(406));
+ exports[mediaType[type]](req, res, files, next, originalDir, showUp, icons, path, view, template, stylesheet);
+ });
+ });
+ };
+};
+
+/**
+ * Respond with text/html.
+ */
+
+exports.html = function(req, res, files, next, dir, showUp, icons, path, view, template, stylesheet){
+ fs.readFile(template, 'utf8', function(err, str){
+ if (err) return next(err);
+ fs.readFile(stylesheet, 'utf8', function(err, style){
+ if (err) return next(err);
+ stat(path, files, function(err, stats){
+ if (err) return next(err);
+ files = files.map(function(file, i){ return { name: file, stat: stats[i] }; });
+ files.sort(fileSort);
+ if (showUp) files.unshift({ name: '..' });
+ str = str
+ .replace(/\{style\}/g, style.concat(iconStyle(files, icons)))
+ .replace(/\{files\}/g, html(files, dir, icons, view))
+ .replace(/\{directory\}/g, dir)
+ .replace(/\{linked-path\}/g, htmlPath(dir));
+
+ var buf = new Buffer(str, 'utf8');
+ res.setHeader('Content-Type', 'text/html; charset=utf-8');
+ res.setHeader('Content-Length', buf.length);
+ res.end(buf);
+ });
+ });
+ });
+};
+
+/**
+ * Respond with application/json.
+ */
+
+exports.json = function(req, res, files){
+ var body = JSON.stringify(files);
+ var buf = new Buffer(body, 'utf8');
+
+ res.setHeader('Content-Type', 'application/json; charset=utf-8');
+ res.setHeader('Content-Length', buf.length);
+ res.end(buf);
+};
+
+/**
+ * Respond with text/plain.
+ */
+
+exports.plain = function(req, res, files){
+ var body = files.join('\n') + '\n';
+ var buf = new Buffer(body, 'utf8');
+
+ res.setHeader('Content-Type', 'text/plain; charset=utf-8');
+ res.setHeader('Content-Length', buf.length);
+ res.end(buf);
+};
+
+/**
+ * Sort function for with directories first.
+ */
+
+function fileSort(a, b) {
+ return Number(b.stat && b.stat.isDirectory()) - Number(a.stat && a.stat.isDirectory()) ||
+ String(a.name).toLocaleLowerCase().localeCompare(String(b.name).toLocaleLowerCase());
+}
+
+/**
+ * Map html `dir`, returning a linked path.
+ */
+
+function htmlPath(dir) {
+ var curr = [];
+ return dir.split('/').map(function(part){
+ curr.push(encodeURIComponent(part));
+ return part ? '<a href="' + curr.join('/') + '">' + part + '</a>' : '';
+ }).join(' / ');
+}
+
+/**
+ * Get the icon data for the file name.
+ */
+
+function iconLookup(filename) {
+ var ext = extname(filename);
+
+ // try by extension
+ if (icons[ext]) {
+ return {
+ className: 'icon-' + ext.substring(1),
+ fileName: icons[ext]
+ };
+ }
+
+ var mimetype = mime.lookup(ext);
+
+ // default if no mime type
+ if (mimetype === false) {
+ return {
+ className: 'icon-default',
+ fileName: icons.default
+ };
+ }
+
+ // try by mime type
+ if (icons[mimetype]) {
+ return {
+ className: 'icon-' + mimetype.replace('/', '-'),
+ fileName: icons[mimetype]
+ };
+ }
+
+ var suffix = mimetype.split('+')[1];
+
+ if (suffix && icons['+' + suffix]) {
+ return {
+ className: 'icon-' + suffix,
+ fileName: icons['+' + suffix]
+ };
+ }
+
+ var type = mimetype.split('/')[0];
+
+ // try by type only
+ if (icons[type]) {
+ return {
+ className: 'icon-' + type,
+ fileName: icons[type]
+ };
+ }
+
+ return {
+ className: 'icon-default',
+ fileName: icons.default
+ };
+}
+
+/**
+ * Load icon images, return css string.
+ */
+
+function iconStyle (files, useIcons) {
+ if (!useIcons) return '';
+ var className;
+ var i;
+ var iconName;
+ var list = [];
+ var rules = {};
+ var selector;
+ var selectors = {};
+ var style = '';
+
+ for (i = 0; i < files.length; i++) {
+ var file = files[i];
+
+ var isDir = '..' == file.name || (file.stat && file.stat.isDirectory());
+ var icon = isDir
+ ? { className: 'icon-directory', fileName: icons.folder }
+ : iconLookup(file.name);
+ var iconName = icon.fileName;
+
+ selector = '#files .' + icon.className + ' .name';
+
+ if (!rules[iconName]) {
+ rules[iconName] = 'background-image: url(data:image/png;base64,' + load(iconName) + ');'
+ selectors[iconName] = [];
+ list.push(iconName);
+ }
+
+ if (selectors[iconName].indexOf(selector) === -1) {
+ selectors[iconName].push(selector);
+ }
+ }
+
+ for (i = 0; i < list.length; i++) {
+ iconName = list[i];
+ style += selectors[iconName].join(',\n') + ' {\n ' + rules[iconName] + '\n}\n';
+ }
+
+ return style;
+}
+
+/**
+ * Map html `files`, returning an html unordered list.
+ */
+
+function html(files, dir, useIcons, view) {
+ return '<ul id="files" class="view-' + view + '">'
+ + (view == 'details' ? (
+ '<li class="header">'
+ + '<span class="name">Name</span>'
+ + '<span class="size">Size</span>'
+ + '<span class="date">Modified</span>'
+ + '</li>') : '')
+ + files.map(function(file){
+ var isDir = '..' == file.name || (file.stat && file.stat.isDirectory())
+ , classes = []
+ , path = dir.split('/').map(function (c) { return encodeURIComponent(c); });
+
+ if (useIcons) {
+ classes.push('icon');
+
+ if (isDir) {
+ classes.push('icon-directory');
+ } else {
+ var ext = extname(file.name);
+ var icon = iconLookup(file.name);
+
+ classes.push('icon');
+ classes.push('icon-' + ext.substring(1));
+
+ if (classes.indexOf(icon.className) === -1) {
+ classes.push(icon.className);
+ }
+ }
+ }
+
+ path.push(encodeURIComponent(file.name));
+
+ var date = file.stat && file.name !== '..'
+ ? file.stat.mtime.toDateString() + ' ' + file.stat.mtime.toLocaleTimeString()
+ : '';
+ var size = file.stat && !isDir
+ ? file.stat.size
+ : '';
+
+ return '<li><a href="'
+ + normalizeSlashes(normalize(path.join('/')))
+ + '" class="'
+ + classes.join(' ') + '"'
+ + ' title="' + file.name + '">'
+ + '<span class="name">'+file.name+'</span>'
+ + '<span class="size">'+size+'</span>'
+ + '<span class="date">'+date+'</span>'
+ + '</a></li>';
+
+ }).join('\n') + '</ul>';
+}
+
+/**
+ * Load and cache the given `icon`.
+ *
+ * @param {String} icon
+ * @return {String}
+ * @api private
+ */
+
+function load(icon) {
+ if (cache[icon]) return cache[icon];
+ return cache[icon] = fs.readFileSync(__dirname + '/public/icons/' + icon, 'base64');
+}
+
+/**
+ * Normalizes the path separator from system separator
+ * to URL separator, aka `/`.
+ *
+ * @param {String} path
+ * @return {String}
+ * @api private
+ */
+
+function normalizeSlashes(path) {
+ return path.split(sep).join('/');
+};
+
+/**
+ * Filter "hidden" `files`, aka files
+ * beginning with a `.`.
+ *
+ * @param {Array} files
+ * @return {Array}
+ * @api private
+ */
+
+function removeHidden(files) {
+ return files.filter(function(file){
+ return '.' != file[0];
+ });
+}
+
+/**
+ * Stat all files and return array of stat
+ * in same order.
+ */
+
+function stat(dir, files, cb) {
+ var batch = new Batch();
+
+ batch.concurrency(10);
+
+ files.forEach(function(file){
+ batch.push(function(done){
+ fs.stat(join(dir, file), function(err, stat){
+ if (err && err.code !== 'ENOENT') return done(err);
+
+ // pass ENOENT as null stat, not error
+ done(null, stat || null);
+ });
+ });
+ });
+
+ batch.end(cb);
+}
+
+/**
+ * Icon map.
+ */
+
+var icons = {
+ // base icons
+ 'default': 'page_white.png',
+ 'folder': 'folder.png',
+
+ // generic mime type icons
+ 'image': 'image.png',
+ 'text': 'page_white_text.png',
+ 'video': 'film.png',
+
+ // generic mime suffix icons
+ '+json': 'page_white_code.png',
+ '+xml': 'page_white_code.png',
+ '+zip': 'box.png',
+
+ // specific mime type icons
+ 'application/font-woff': 'font.png',
+ 'application/javascript': 'page_white_code_red.png',
+ 'application/json': 'page_white_code.png',
+ 'application/msword': 'page_white_word.png',
+ 'application/pdf': 'page_white_acrobat.png',
+ 'application/postscript': 'page_white_vector.png',
+ 'application/rtf': 'page_white_word.png',
+ 'application/vnd.ms-excel': 'page_white_excel.png',
+ 'application/vnd.ms-powerpoint': 'page_white_powerpoint.png',
+ 'application/vnd.oasis.opendocument.presentation': 'page_white_powerpoint.png',
+ 'application/vnd.oasis.opendocument.spreadsheet': 'page_white_excel.png',
+ 'application/vnd.oasis.opendocument.text': 'page_white_word.png',
+ 'application/x-7z-compressed': 'box.png',
+ 'application/x-sh': 'application_xp_terminal.png',
+ 'application/x-font-ttf': 'font.png',
+ 'application/x-msaccess': 'page_white_database.png',
+ 'application/x-shockwave-flash': 'page_white_flash.png',
+ 'application/x-sql': 'page_white_database.png',
+ 'application/x-tar': 'box.png',
+ 'application/x-xz': 'box.png',
+ 'application/xml': 'page_white_code.png',
+ 'application/zip': 'box.png',
+ 'image/svg+xml': 'page_white_vector.png',
+ 'text/css': 'page_white_code.png',
+ 'text/html': 'page_white_code.png',
+ 'text/less': 'page_white_code.png',
+
+ // other, extension-specific icons
+ '.accdb': 'page_white_database.png',
+ '.apk': 'box.png',
+ '.app': 'application_xp.png',
+ '.as': 'page_white_actionscript.png',
+ '.asp': 'page_white_code.png',
+ '.aspx': 'page_white_code.png',
+ '.bat': 'application_xp_terminal.png',
+ '.bz2': 'box.png',
+ '.c': 'page_white_c.png',
+ '.cab': 'box.png',
+ '.cfm': 'page_white_coldfusion.png',
+ '.clj': 'page_white_code.png',
+ '.cc': 'page_white_cplusplus.png',
+ '.cgi': 'application_xp_terminal.png',
+ '.cpp': 'page_white_cplusplus.png',
+ '.cs': 'page_white_csharp.png',
+ '.db': 'page_white_database.png',
+ '.dbf': 'page_white_database.png',
+ '.deb': 'box.png',
+ '.dll': 'page_white_gear.png',
+ '.dmg': 'drive.png',
+ '.docx': 'page_white_word.png',
+ '.erb': 'page_white_ruby.png',
+ '.exe': 'application_xp.png',
+ '.fnt': 'font.png',
+ '.gam': 'controller.png',
+ '.gz': 'box.png',
+ '.h': 'page_white_h.png',
+ '.ini': 'page_white_gear.png',
+ '.iso': 'cd.png',
+ '.jar': 'box.png',
+ '.java': 'page_white_cup.png',
+ '.jsp': 'page_white_cup.png',
+ '.lua': 'page_white_code.png',
+ '.lz': 'box.png',
+ '.lzma': 'box.png',
+ '.m': 'page_white_code.png',
+ '.map': 'map.png',
+ '.msi': 'box.png',
+ '.mv4': 'film.png',
+ '.otf': 'font.png',
+ '.pdb': 'page_white_database.png',
+ '.php': 'page_white_php.png',
+ '.pl': 'page_white_code.png',
+ '.pkg': 'box.png',
+ '.pptx': 'page_white_powerpoint.png',
+ '.psd': 'page_white_picture.png',
+ '.py': 'page_white_code.png',
+ '.rar': 'box.png',
+ '.rb': 'page_white_ruby.png',
+ '.rm': 'film.png',
+ '.rom': 'controller.png',
+ '.rpm': 'box.png',
+ '.sass': 'page_white_code.png',
+ '.sav': 'controller.png',
+ '.scss': 'page_white_code.png',
+ '.srt': 'page_white_text.png',
+ '.tbz2': 'box.png',
+ '.tgz': 'box.png',
+ '.tlz': 'box.png',
+ '.vb': 'page_white_code.png',
+ '.vbs': 'page_white_code.png',
+ '.xcf': 'page_white_picture.png',
+ '.xlsx': 'page_white_excel.png',
+ '.yaws': 'page_white_code.png'
+};