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* serve-index * Copyright(c) 2011 Sencha Inc. * Copyright(c) 2011 TJ Holowaychuk * Copyright(c) 2014-2015 Douglas Christopher Wilson * MIT Licensed */ 'use strict'; /** * Module dependencies. * @private */ var accepts = require('accepts'); var createError = require('http-errors'); var debug = require('debug')('serve-index'); var escapeHtml = require('escape-html'); 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; /** * Module exports. * @public */ module.exports = serveIndex; /*! * 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} root * @param {Object} options * @return {Function} middleware * @public */ function serveIndex(root, options) { var opts = options || {}; // root required if (!root) { throw new TypeError('serveIndex() root path required'); } // resolve root to absolute and normalize var rootPath = normalize(resolve(root) + sep); var filter = opts.filter; var hidden = opts.hidden; var icons = opts.icons; var stylesheet = opts.stylesheet || defaultStylesheet; var template = opts.template || defaultTemplate; var view = opts.view || 'tiles'; return function (req, res, next) { if (req.method !== 'GET' && req.method !== 'HEAD') { res.statusCode = 'OPTIONS' === req.method ? 200 : 405; res.setHeader('Allow', 'GET, HEAD, OPTIONS'); res.setHeader('Content-Length', '0'); 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(rootPath, dir)); // null byte(s), bad request if (~path.indexOf('\0')) return next(createError(400)); // malicious path if ((path + sep).substr(0, rootPath.length) !== rootPath) { debug('malicious path "%s"', path); return next(createError(403)); } // determine ".." display var showUp = normalize(resolve(path) + sep) !== rootPath; // 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)); serveIndex[mediaType[type]](req, res, files, next, originalDir, showUp, icons, path, view, template, stylesheet); }); }); }; }; /** * Respond with text/html. */ serveIndex.html = function _html(req, res, files, next, dir, showUp, icons, path, view, template, stylesheet) { var render = typeof template !== 'function' ? createHtmlRender(template) : template if (showUp) { files.unshift('..'); } // stat all files stat(path, files, function (err, stats) { if (err) return next(err); // combine the stats into the file list var fileList = files.map(function (file, i) { return { name: file, stat: stats[i] }; }); // sort file list fileList.sort(fileSort); // read stylesheet fs.readFile(stylesheet, 'utf8', function (err, style) { if (err) return next(err); // create locals for rendering var locals = { directory: dir, displayIcons: Boolean(icons), fileList: fileList, path: path, style: style, viewName: view }; // render html render(locals, function (err, body) { if (err) return next(err); send(res, 'text/html', body) }); }); }); }; /** * Respond with application/json. */ serveIndex.json = function _json(req, res, files) { send(res, 'application/json', JSON.stringify(files)) }; /** * Respond with text/plain. */ serveIndex.plain = function _plain(req, res, files) { send(res, 'text/plain', (files.join('\n') + '\n')) }; /** * Map html `files`, returning an html unordered list. * @private */ function createHtmlFileList(files, dir, useIcons, view) { var html = '
    ' + (view == 'details' ? ( '
  • ' + 'Name' + 'Size' + 'Modified' + '
    • ') : ''); html += files.map(function (file) { var classes = []; var isDir = file.stat && file.stat.isDirectory(); var 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.toLocaleDateString() + ' ' + file.stat.mtime.toLocaleTimeString() : ''; var size = file.stat && !isDir ? file.stat.size : ''; return '
  • ' + '' + escapeHtml(file.name) + '' + '' + escapeHtml(size) + '' + '' + escapeHtml(date) + '' + '
    • '; }).join('\n'); html += '
'; return html; } /** * Create function to render html. */ function createHtmlRender(template) { return function render(locals, callback) { // read template fs.readFile(template, 'utf8', function (err, str) { if (err) return callback(err); var body = str .replace(/\{style\}/g, locals.style.concat(iconStyle(locals.fileList, locals.displayIcons))) .replace(/\{files\}/g, createHtmlFileList(locals.fileList, locals.directory, locals.displayIcons, locals.viewName)) .replace(/\{directory\}/g, escapeHtml(locals.directory)) .replace(/\{linked-path\}/g, htmlPath(locals.directory)); callback(null, body); }); }; } /** * Sort function for with directories first. */ function fileSort(a, b) { // sort ".." to the top if (a.name === '..' || b.name === '..') { return a.name === b.name ? 0 : a.name === '..' ? -1 : 1; } 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 parts = dir.split('/'); var crumb = new Array(parts.length); for (var i = 0; i < parts.length; i++) { var part = parts[i]; if (part) { parts[i] = encodeURIComponent(part); crumb[i] = '' + escapeHtml(part) + ''; } } return crumb.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 i; var list = []; var rules = {}; var selector; var selectors = {}; var style = ''; for (i = 0; i < files.length; i++) { var file = files[i]; var isDir = 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; } /** * 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]; }); } /** * Send a response. * @private */ function send (res, type, body) { // security header for content sniffing res.setHeader('X-Content-Type-Options', 'nosniff') // standard headers res.setHeader('Content-Type', type + '; charset=utf-8') res.setHeader('Content-Length', Buffer.byteLength(body, 'utf8')) // body res.end(body, 'utf8') } /** * 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' };