serve-tpl-download.js/index.js

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2018-08-12 09:27:28 +00:00
/*!
* telebit/serve-index
* Copyright(c) 2018 AJ ONeal
*
* Derivative work of github.com/expressjs/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 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');
/**
* Module exports.
* @public
*/
var defaultPagepath = path.join(__dirname, 'public/directory.html');
var defaultStylepath = path.join(__dirname, 'public/style.css');
var defaultList = '<ul id="files" class="view-{view}">{head}{files}</ul>';
var defaultHead = '<li class="header">'
+ '<span class="name">Name</span>'
+ '<span class="size">Size</span>'
+ '<span class="date">Modified</span>'
+ '</li>'
;
var defaultFile = '<li><div>'
+ '<a href="{path}?download=true" class="download" title="Download {file.name}">'
+ '<span class="download">⬇️</span>'
+ '</a>'
+ '<a href="{path}" class="{classes}" title="{file.name}">'
+ '<span class="name">{file.name}</span>'
+ '<span class="size">{file.size}</span>'
+ '<span class="date">{file.date}</span>'
+ '</a>'
+ '</div></li>'
;
module.exports = function (opts) {
if (!opts) { opts = {}; }
return createHtmlRender({
pagepath: opts.pagepath || defaultPagepath
, stylepath: opts.stylepath || defaultStylepath
, list: opts.list || defaultList
, head: opts.head || defaultHead
, file: opts.file || defaultFile
, privatefiles: opts.privatefiles
});
};
/*!
* Icon cache.
*/
var cache = {};
/**
* Map html `files`, returning an html unordered list.
* @private
*/
function createHtmlFileList(opts, files, dir, useIcons, view) {
var ftpls = 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
: '';
var OCTAL = 8;
var WORLD_READ = parseInt(4, OCTAL); // R(4)W(2)X(1)
var hasWorldRead = file.mode | WORLD_READ;
if (!hasWorldRead && 'ignore' === opts.privatefiles) {
return '';
}
return opts.file.replace(/{path}/g, escapeHtml(normalizeSlashes(normalize(path.join('/')))))
.replace(/{classes}/g, escapeHtml(classes.join(' ')))
.replace(/{file.name}/g, escapeHtml(file.name))
.replace(/{file.size}/g, escapeHtml(size))
.replace(/{file.date}/g, escapeHtml(date))
;
}).filter(Boolean).join('\n');
var html = opts.list
.replace(/{view}/g, escapeHtml(view))
.replace(/{head}/g, view === 'details' ? opts.head : '')
.replace(/{files}/g, ftpls)
;
return html;
}
/**
* Create function to render html.
*/
function createHtmlRender(opts) {
return function render(locals, callback) {
// read template
fs.readFile(opts.pagepath, 'utf8', function (err, pageStr) {
fs.readFile(opts.stylepath, 'utf8', function (err, styleStr) {
if (err) return callback(err);
var body = pageStr
.replace(/\{style\}/g, styleStr.concat(iconStyle(locals.fileList, locals.displayIcons)))
.replace(/\{files\}/g, createHtmlFileList(opts, locals.fileList, locals.directory, locals.displayIcons, locals.viewName))
.replace(/\{directory\}/g, escapeHtml(locals.directory))
.replace(/\{linked-path\}/g, htmlPath(locals.directory))
;
callback(null, body);
});
});
};
}
/**
* 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] = '<a href="' + escapeHtml(parts.slice(0, i + 1).join('/')) + '">' + escapeHtml(part) + '</a>';
}
}
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('/');
}
/**
* 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
'font': 'font.png',
'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/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-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',
'.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'
};