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index.js
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index.js
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'use strict';
/**
* @file mod_autoindex main
* @module mod_autoindex
* @version 1.7.0
* @author hex7c0 <hex7c0@gmail.com>
* @copyright hex7c0 2014
* @license GPLv3
*/
/*
* initialize module
*/
var status = require('http').STATUS_CODES;
var path = require('path');
var fs = require('fs');
var parse = require('parseurl');
var serve = require('serve-static');
var header = '<html>\n<head><title>Index of {{path}}</title></head>\n<body bgcolor="white">\n<h1>Index of {{path}}</h1><hr><pre>\n';
var footer = '</pre><hr></body>\n</html>\n';
var month = [ 'Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep',
'Oct', 'Nov', 'Dec' ];
/*
* functions
*/
/**
* build multiple space
*
* @function multiple
* @param {Integer} length - string.length
* @param {Integer} limit - max space
* @return {String}
*/
function multiple(length, limit) {
var space = '';
if (limit < length) {
return space;
}
for (var i = 0, ii = limit - length; i < ii; ++i) {
space += ' ';
}
return space;
}
/**
* error handling
*
* @function error
* @param {Object|Number} e - error
* @return {Error}
*/
function error(e) {
if (isNaN(e) === false) {
return new Error(status[e]);
}
return new Error(e.code === 'ENAMETOOLONG' ? status[414] : status[404]);
}
/**
* add zero
*
* @function pad
* @param {Integer} num - number
* @return {String}
*/
function pad(num) {
var norm = Math.abs(Math.floor(num));
return (norm < 10 ? '0' : '') + norm;
}
/**
* function wrapper for multiple require
*
* @function wrapper
* @param {Object} my - options
* @return {Object}
*/
function wrapper(my) {
/**
* next callback
*
* @function output
* @param {Object} res - response to client
* @param {Object|String} head - header
* @param {String} after - post header
* @param {String} paths - dir path
* @param {Object} stat - path stat
*/
function output(res, head, after, paths, stat) {
if (my.json === true) {
res.send(head);
STORY.body = head;
} else {
head += after + footer;
res.send(head);
STORY.body = head;
}
if (my.cache === true) {
STORY.path = paths;
STORY.mtime = stat.mtime.getTime();
}
return;
}
/**
* json builder
*
* @function json
* @param {Object} head - header
* @param {String} after - post header
* @param {String} file - file name
* @param {Object} stats - stats of file
* @return {Array}
*/
function json(head, after, file, stats) {
var size;
var fil = file;
if (stats.isDirectory() === true) {
size = '-';
fil += '/';
} else {
size = String(stats.size);
}
head[fil] = Object.create(null);
if (my.date === true) {
var d = new Date(stats.mtime);
var h = pad(d.getDate()) + '-' + month[d.getMonth()] + '-'
+ d.getFullYear();
h += ' ' + pad(d.getHours()) + ':' + pad(d.getMinutes());
head[fil].mtime = h;
}
if (my.size === true) {
head[fil].size = size;
}
return [ head, null ];
}
/**
* html builder
*
* @function html
* @param {String} head - header
* @param {String} after - post header
* @param {String} file - file name
* @param {Object} stats - stats of file
* @return {Array}
*/
function html(head, after, file, stats) {
var h;
var size;
var hea = head;
var afte = after;
var fil = file;
if (stats.isDirectory() === true) {
size = '-';
fil += '/';
} else {
size = String(stats.size);
}
h = '<a href="' + fil + '">' + fil + '</a>';
h += multiple(fil.length, 50);
if (my.date === true) {
var d = new Date(stats.mtime);
h += pad(d.getDate()) + '-' + month[d.getMonth()] + '-' + d.getFullYear();
h += ' ' + pad(d.getHours()) + ':' + pad(d.getMinutes());
h += multiple(size.length, 20);
}
if (my.size === true) {
h += size;
}
h += '\n';
if (my.priority === true) {
if (size === '-') {
hea += h;
} else {
afte += h;
}
} else {
hea += h;
}
return [ hea, afte ];
}
var STORY = Object.create(null);
var build = html;
if (my.json === true) {
build = json;
}
// start sync
if (my.sync === true) {
/**
* body
*
* @function mod_sync
* @param {Object} req - client request
* @param {Object} res - response to client
* @param {next} next - next callback
*/
return function mod_sync(req, res, next) {
if (my.strictMethod === true && 'GET' !== req.method
&& 'HEAD' !== req.method) {
return next(error(404));
}
var paths = decodeURIComponent(parse(req).pathname)
.replace(/\/{2,}/, '/');
var prova = path.normalize(path.join(my.root, paths));
if (~prova.indexOf('\0')) { // null byte(s), bad request
return next(error(400));
} else if (prova <= my.root) { // /../
return next(error(403));
}
var stat = fs.statSync(prova);
if (stat) {
if (STORY.mtime && STORY.mtime === stat.mtime.getTime()
&& STORY.path === prova) { // cache
return res.send(STORY.body);
}
if (stat.isDirectory() === false) {
if (my.exclude !== false && my.exclude.test(prova)) {
return next(error(404));
}
return my.statico(req, res, next);
}
var head;
if (my.json === true) {
head = Object.create(null);
} else {
head = header;
head = head.replace(/{{path}}/g, paths);
if (paths != '/') {
head += '<a href="../">../</a>\n';
}
}
var files = fs.readdirSync(prova);
if (files) {
var after = '';
for (var i = 0, ii = files.length; i < ii; ++i) {
var file = files[i];
if (my.exclude !== false && my.exclude.test(file)) {
continue;
}
if (my.dotfiles === true && file[0] === '.') {
continue;
}
var stats = fs.statSync(prova + path.sep + file);
if (stats) {
var r = build(head, after, file, stats);
head = r[0];
after = r[1];
}
}
return output(res, head, after, prova, stat);
}
}
return my.statico(req, res, next);
};
}
// end sync
// start callback
/**
* body
*
* @function mod_callback
* @param {Object} req - client request
* @param {Object} res - response to client
* @param {next} next - next callback
*/
return function mod_callback(req, res, next) {
if (my.strictMethod === true && 'GET' !== req.method
&& 'HEAD' !== req.method) {
return next(error(404));
}
var paths = decodeURIComponent(parse(req).pathname).replace(/\/{2,}/, '/');
var prova = path.normalize(path.join(my.root, paths));
if (~prova.indexOf('\0')) { // null byte(s), bad request
return next(error(400));
} else if (prova <= my.root) { // /../
return next(error(403));
}
return fs.stat(prova, function(err, stat) {
if (err) {
return next(error(err));
}
if (STORY.mtime && STORY.mtime === stat.mtime.getTime()
&& STORY.path === prova) { // cache
return res.send(STORY.body);
}
if (stat.isDirectory() === false) {
if (my.exclude !== false && my.exclude.test(prova)) {
return next(error(404));
}
return my.statico(req, res, next);
}
var head;
if (my.json === true) {
head = Object.create(null);
} else {
head = header;
head = head.replace(/{{path}}/g, paths);
if (paths != '/') {
head += '<a href="../">../</a>\n';
}
}
return fs.readdir(prova, function(err, files) {
if (err) {
return next(error(err));
}
var after = '';
var cc = files.length - 1;
for (var i = 0, ii = files.length; i < ii; ++i) {
!function(file) {
if (my.exclude !== false && my.exclude.test(file)) {
if (cc === 0) {
return output(res, head, after, prova, stat);
}
--cc;
return;
} else if (my.dotfiles === true && file[0] === '.') {
if (cc === 0) {
return output(res, head, after, prova, stat);
}
--cc;
return;
}
return fs.stat(prova + path.sep + file, function(err, stats) {
if (err) {
return next(error(err));
}
var r = build(head, after, file, stats);
head = r[0];
after = r[1];
if (cc === 0) {
return output(res, head, after, prova, stat);
}
--cc;
return;
});
}(files[i]);
}
return;
});
});
};
// end callback
}
/**
* options setting
*
* @exports index
* @function index
* @param {String} root - root path
* @param {Object} [opt] - various options. Check README.md
* @return {Object}
*/
function index(root, opt) {
if (!root) {
throw new TypeError('root path required');
}
var r = path.resolve(root);
if (r[r.length - 1] == '/') {
r = r.substr(0, r.length - 1);
}
if (!fs.existsSync(root)) {
throw new Error('path not exists');
} else if (!fs.statSync(r).isDirectory()) {
throw new Error('path is not a directory');
}
var options = opt || Object.create(null);
var my = {
root: r,
exclude: options.exclude || false,
dotfiles: options.dotfiles === false ? false : true,
date: options.date === false ? false : true,
size: options.size === false ? false : true,
priority: options.priority === false ? false : true,
cache: options.cache === false ? false : true,
strictMethod: Boolean(options.strictMethod),
sync: Boolean(options.sync),
json: Boolean(options.json),
static: options.static === false ? false : options.static || {}
};
if (my.dotfiles === false && options.static !== false) {
my.static.dotfiles = 'allow';
}
my.statico = my.static === false ? function(req, res, next) {
return next();
} : serve(r, my.static);
return wrapper(my);
}
module.exports = index;