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utils.js
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// Copyright 2012-2016 (c) Peter Širka <[email protected]>
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.
/**
* @module FrameworkUtils
* @version 2.1.0
*/
'use strict';
const Dns = require('dns');
const parser = require('url');
const qs = require('querystring');
const http = require('http');
const https = require('https');
const path = require('path');
const fs = require('fs');
const events = require('events');
const crypto = require('crypto');
if (!global.framework_utils)
global.framework_utils = exports;
var regexpSTATIC = /\.\w{2,8}($|\?)+/;
const regexpMail = new RegExp('^[a-zA-Z0-9-_.+]+@[a-zA-Z0-9.-]+\\.[a-zA-Z]{2,}$');
const regexpUrl = /^(http|https):\/\/(?:(?:(?:[\w\.\-\+!$&'\(\)*\+,;=]|%[0-9a-f]{2})+:)*(?:[\w\.\-\+%!$&'\(\)*\+,;=]|%[0-9a-f]{2})+@)?(?:(?:[a-z0-9\-\.]|%[0-9a-f]{2})+|(?:\[(?:[0-9a-f]{0,4}:)*(?:[0-9a-f]{0,4})\]))(?::[0-9]+)?(?:[\/|\?](?:[\w#!:\.\?\+=&@!$'~*,;\/\(\)\[\]\-]|%[0-9a-f]{2})*)?$/i;
const regexpPhone = /^[\+]?[(]?[0-9]{3}[)]?[-\s\.]?[0-9]{3}[-\s\.]?[0-9]{4,6}$/im;
const regexpTRIM = /^[\s]+|[\s]+$/g;
const regexpDATE = /(\d{1,2}\.\d{1,2}\.\d{4})|(\d{4}\-\d{1,2}\-\d{1,2})|(\d{1,2}\:\d{1,2}(\:\d{1,2})?)/g;
const regexpDATEFORMAT = /yyyy|yy|M+|d+|HH|H|hh|h|mm|m|ss|s|a|ww|w/g;
const regexpSTRINGFORMAT = /\{\d+\}/g;
const regexpPATH = /\\/g;
const regexpTags = /<\/?[^>]+(>|$)/g;
const regexpDiacritics = /[^\u0000-\u007e]/g;
const regexpUID = /^\d{14,}[a-z]{3}[01]{1}$/;
const regexpZIP = /^\d{5}(?:[-\s]\d{4})?$/;
const regexpXML = /\w+\=\".*?\"/g;
const regexpDECODE = /&#?[a-z0-9]+;/g;
const regexpPARAM = /\{{2}[^}\n]*\}{2}/g;
const regexpINTEGER = /[\-0-9]+/g;
const regexpFLOAT = /[\-0-9\.\,]+/g;
const regexpALPHA = /^[A-Za-z0-9]+$/;
const regexpSEARCH = /[^a-zA-Zá-žÁ-Ž\d\s:]/g;
const regexpDECRYPT = /\-|\_/g;
const regexpENCRYPT = /\/|\+/g;
const SOUNDEX = { a: '', e: '', i: '', o: '', u: '', b: 1, f: 1, p: 1, v: 1, c: 2, g: 2, j: 2, k: 2, q: 2, s: 2, x: 2, z: 2, d: 3, t: 3, l: 4, m: 5, n: 5, r: 6 };
const ENCODING = 'utf8';
const NEWLINE = '\r\n';
const isWindows = require('os').platform().substring(0, 3).toLowerCase() === 'win';
const MONTHS = ['January', 'February', 'March', 'April', 'May', 'Juny', 'July', 'August', 'September', 'October', 'November', 'December'];
const DAYS = ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'];
const DIACRITICSMAP = {};
const STREAM_READONLY = { flags: 'r' };
const STREAM_END = { end: false };
const ALPHA_INDEX = { '<': '<', '>': '>', '"': '"', '&apos': '\'', '&': '&', '<': '<', '>': '>', '"': '"', ''': '\'', '&': '&' };
const EMPTYARRAY = [];
Object.freeze(EMPTYARRAY);
var DIACRITICS=[{b:' ',c:'\u00a0'},{b:'0',c:'\u07c0'},{b:'A',c:'\u24b6\uff21\u00c0\u00c1\u00c2\u1ea6\u1ea4\u1eaa\u1ea8\u00c3\u0100\u0102\u1eb0\u1eae\u1eb4\u1eb2\u0226\u01e0\u00c4\u01de\u1ea2\u00c5\u01fa\u01cd\u0200\u0202\u1ea0\u1eac\u1eb6\u1e00\u0104\u023a\u2c6f'},{b:'AA',c:'\ua732'},{b:'AE',c:'\u00c6\u01fc\u01e2'},{b:'AO',c:'\ua734'},{b:'AU',c:'\ua736'},{b:'AV',c:'\ua738\ua73a'},{b:'AY',c:'\ua73c'},{b:'B',c:'\u24b7\uff22\u1e02\u1e04\u1e06\u0243\u0181'},{b:'C',c:'\u24b8\uff23\ua73e\u1e08\u0106C\u0108\u010a\u010c\u00c7\u0187\u023b'},{b:'D',c:'\u24b9\uff24\u1e0a\u010e\u1e0c\u1e10\u1e12\u1e0e\u0110\u018a\u0189\u1d05\ua779'},{b:'Dh',c:'\u00d0'},{b:'DZ',c:'\u01f1\u01c4'},{b:'Dz',c:'\u01f2\u01c5'},{b:'E',c:'\u025b\u24ba\uff25\u00c8\u00c9\u00ca\u1ec0\u1ebe\u1ec4\u1ec2\u1ebc\u0112\u1e14\u1e16\u0114\u0116\u00cb\u1eba\u011a\u0204\u0206\u1eb8\u1ec6\u0228\u1e1c\u0118\u1e18\u1e1a\u0190\u018e\u1d07'},{b:'F',c:'\ua77c\u24bb\uff26\u1e1e\u0191\ua77b'}, {b:'G',c:'\u24bc\uff27\u01f4\u011c\u1e20\u011e\u0120\u01e6\u0122\u01e4\u0193\ua7a0\ua77d\ua77e\u0262'},{b:'H',c:'\u24bd\uff28\u0124\u1e22\u1e26\u021e\u1e24\u1e28\u1e2a\u0126\u2c67\u2c75\ua78d'},{b:'I',c:'\u24be\uff29\u00cc\u00cd\u00ce\u0128\u012a\u012c\u0130\u00cf\u1e2e\u1ec8\u01cf\u0208\u020a\u1eca\u012e\u1e2c\u0197'},{b:'J',c:'\u24bf\uff2a\u0134\u0248\u0237'},{b:'K',c:'\u24c0\uff2b\u1e30\u01e8\u1e32\u0136\u1e34\u0198\u2c69\ua740\ua742\ua744\ua7a2'},{b:'L',c:'\u24c1\uff2c\u013f\u0139\u013d\u1e36\u1e38\u013b\u1e3c\u1e3a\u0141\u023d\u2c62\u2c60\ua748\ua746\ua780'}, {b:'LJ',c:'\u01c7'},{b:'Lj',c:'\u01c8'},{b:'M',c:'\u24c2\uff2d\u1e3e\u1e40\u1e42\u2c6e\u019c\u03fb'},{b:'N',c:'\ua7a4\u0220\u24c3\uff2e\u01f8\u0143\u00d1\u1e44\u0147\u1e46\u0145\u1e4a\u1e48\u019d\ua790\u1d0e'},{b:'NJ',c:'\u01ca'},{b:'Nj',c:'\u01cb'},{b:'O',c:'\u24c4\uff2f\u00d2\u00d3\u00d4\u1ed2\u1ed0\u1ed6\u1ed4\u00d5\u1e4c\u022c\u1e4e\u014c\u1e50\u1e52\u014e\u022e\u0230\u00d6\u022a\u1ece\u0150\u01d1\u020c\u020e\u01a0\u1edc\u1eda\u1ee0\u1ede\u1ee2\u1ecc\u1ed8\u01ea\u01ec\u00d8\u01fe\u0186\u019f\ua74a\ua74c'}, {b:'OE',c:'\u0152'},{b:'OI',c:'\u01a2'},{b:'OO',c:'\ua74e'},{b:'OU',c:'\u0222'},{b:'P',c:'\u24c5\uff30\u1e54\u1e56\u01a4\u2c63\ua750\ua752\ua754'},{b:'Q',c:'\u24c6\uff31\ua756\ua758\u024a'},{b:'R',c:'\u24c7\uff32\u0154\u1e58\u0158\u0210\u0212\u1e5a\u1e5c\u0156\u1e5e\u024c\u2c64\ua75a\ua7a6\ua782'},{b:'S',c:'\u24c8\uff33\u1e9e\u015a\u1e64\u015c\u1e60\u0160\u1e66\u1e62\u1e68\u0218\u015e\u2c7e\ua7a8\ua784'},{b:'T',c:'\u24c9\uff34\u1e6a\u0164\u1e6c\u021a\u0162\u1e70\u1e6e\u0166\u01ac\u01ae\u023e\ua786'}, {b:'Th',c:'\u00de'},{b:'TZ',c:'\ua728'},{b:'U',c:'\u24ca\uff35\u00d9\u00da\u00db\u0168\u1e78\u016a\u1e7a\u016c\u00dc\u01db\u01d7\u01d5\u01d9\u1ee6\u016e\u0170\u01d3\u0214\u0216\u01af\u1eea\u1ee8\u1eee\u1eec\u1ef0\u1ee4\u1e72\u0172\u1e76\u1e74\u0244'},{b:'V',c:'\u24cb\uff36\u1e7c\u1e7e\u01b2\ua75e\u0245'},{b:'VY',c:'\ua760'},{b:'W',c:'\u24cc\uff37\u1e80\u1e82\u0174\u1e86\u1e84\u1e88\u2c72'},{b:'X',c:'\u24cd\uff38\u1e8a\u1e8c'},{b:'Y',c:'\u24ce\uff39\u1ef2\u00dd\u0176\u1ef8\u0232\u1e8e\u0178\u1ef6\u1ef4\u01b3\u024e\u1efe'}, {b:'Z',c:'\u24cf\uff3a\u0179\u1e90\u017b\u017d\u1e92\u1e94\u01b5\u0224\u2c7f\u2c6b\ua762'},{b:'a',c:'\u24d0\uff41\u1e9a\u00e0\u00e1\u00e2\u1ea7\u1ea5\u1eab\u1ea9\u00e3\u0101\u0103\u1eb1\u1eaf\u1eb5\u1eb3\u0227\u01e1\u00e4\u01df\u1ea3\u00e5\u01fb\u01ce\u0201\u0203\u1ea1\u1ead\u1eb7\u1e01\u0105\u2c65\u0250\u0251'},{b:'aa',c:'\ua733'},{b:'ae',c:'\u00e6\u01fd\u01e3'},{b:'ao',c:'\ua735'},{b:'au',c:'\ua737'},{b:'av',c:'\ua739\ua73b'},{b:'ay',c:'\ua73d'}, {b:'b',c:'\u24d1\uff42\u1e03\u1e05\u1e07\u0180\u0183\u0253\u0182'},{b:'c',c:'\uff43\u24d2\u0107\u0109\u010b\u010d\u00e7\u1e09\u0188\u023c\ua73f\u2184'},{b:'d',c:'\u24d3\uff44\u1e0b\u010f\u1e0d\u1e11\u1e13\u1e0f\u0111\u018c\u0256\u0257\u018b\u13e7\u0501\ua7aa'},{b:'dh',c:'\u00f0'},{b:'dz',c:'\u01f3\u01c6'},{b:'e',c:'\u24d4\uff45\u00e8\u00e9\u00ea\u1ec1\u1ebf\u1ec5\u1ec3\u1ebd\u0113\u1e15\u1e17\u0115\u0117\u00eb\u1ebb\u011b\u0205\u0207\u1eb9\u1ec7\u0229\u1e1d\u0119\u1e19\u1e1b\u0247\u01dd'}, {b:'f',c:'\u24d5\uff46\u1e1f\u0192'},{b:'ff',c:'\ufb00'},{b:'fi',c:'\ufb01'},{b:'fl',c:'\ufb02'},{b:'ffi',c:'\ufb03'},{b:'ffl',c:'\ufb04'},{b:'g',c:'\u24d6\uff47\u01f5\u011d\u1e21\u011f\u0121\u01e7\u0123\u01e5\u0260\ua7a1\ua77f\u1d79'},{b:'h',c:'\u24d7\uff48\u0125\u1e23\u1e27\u021f\u1e25\u1e29\u1e2b\u1e96\u0127\u2c68\u2c76\u0265'},{b:'hv',c:'\u0195'},{b:'i',c:'\u24d8\uff49\u00ec\u00ed\u00ee\u0129\u012b\u012d\u00ef\u1e2f\u1ec9\u01d0\u0209\u020b\u1ecb\u012f\u1e2d\u0268\u0131'}, {b:'j',c:'\u24d9\uff4a\u0135\u01f0\u0249'},{b:'k',c:'\u24da\uff4b\u1e31\u01e9\u1e33\u0137\u1e35\u0199\u2c6a\ua741\ua743\ua745\ua7a3'},{b:'l',c:'\u24db\uff4c\u0140\u013a\u013e\u1e37\u1e39\u013c\u1e3d\u1e3b\u017f\u0142\u019a\u026b\u2c61\ua749\ua781\ua747\u026d'},{b:'lj',c:'\u01c9'},{b:'m',c:'\u24dc\uff4d\u1e3f\u1e41\u1e43\u0271\u026f'},{b:'n',c:'\u24dd\uff4e\u01f9\u0144\u00f1\u1e45\u0148\u1e47\u0146\u1e4b\u1e49\u019e\u0272\u0149\ua791\ua7a5\u043b\u0509'},{b:'nj', c:'\u01cc'},{b:'o',c:'\u24de\uff4f\u00f2\u00f3\u00f4\u1ed3\u1ed1\u1ed7\u1ed5\u00f5\u1e4d\u022d\u1e4f\u014d\u1e51\u1e53\u014f\u022f\u0231\u00f6\u022b\u1ecf\u0151\u01d2\u020d\u020f\u01a1\u1edd\u1edb\u1ee1\u1edf\u1ee3\u1ecd\u1ed9\u01eb\u01ed\u00f8\u01ff\ua74b\ua74d\u0275\u0254\u1d11'},{b:'oe',c:'\u0153'},{b:'oi',c:'\u01a3'},{b:'oo',c:'\ua74f'},{b:'ou',c:'\u0223'},{b:'p',c:'\u24df\uff50\u1e55\u1e57\u01a5\u1d7d\ua751\ua753\ua755\u03c1'},{b:'q',c:'\u24e0\uff51\u024b\ua757\ua759'}, {b:'r',c:'\u24e1\uff52\u0155\u1e59\u0159\u0211\u0213\u1e5b\u1e5d\u0157\u1e5f\u024d\u027d\ua75b\ua7a7\ua783'},{b:'s',c:'\u24e2\uff53\u015b\u1e65\u015d\u1e61\u0161\u1e67\u1e63\u1e69\u0219\u015f\u023f\ua7a9\ua785\u1e9b\u0282'},{b:'ss',c:'\u00df'},{b:'t',c:'\u24e3\uff54\u1e6b\u1e97\u0165\u1e6d\u021b\u0163\u1e71\u1e6f\u0167\u01ad\u0288\u2c66\ua787'},{b:'th',c:'\u00fe'},{b:'tz',c:'\ua729'},{b:'u',c:'\u24e4\uff55\u00f9\u00fa\u00fb\u0169\u1e79\u016b\u1e7b\u016d\u00fc\u01dc\u01d8\u01d6\u01da\u1ee7\u016f\u0171\u01d4\u0215\u0217\u01b0\u1eeb\u1ee9\u1eef\u1eed\u1ef1\u1ee5\u1e73\u0173\u1e77\u1e75\u0289'}, {b:'v',c:'\u24e5\uff56\u1e7d\u1e7f\u028b\ua75f\u028c'},{b:'vy',c:'\ua761'},{b:'w',c:'\u24e6\uff57\u1e81\u1e83\u0175\u1e87\u1e85\u1e98\u1e89\u2c73'},{b:'x',c:'\u24e7\uff58\u1e8b\u1e8d'},{b:'y',c:'\u24e8\uff59\u1ef3\u00fd\u0177\u1ef9\u0233\u1e8f\u00ff\u1ef7\u1e99\u1ef5\u01b4\u024f\u1eff'},{b:'z',c:'\u24e9\uff5a\u017a\u1e91\u017c\u017e\u1e93\u1e95\u01b6\u0225\u0240\u2c6c\ua763'}];
for (var i=0; i <DIACRITICS.length; i+=1)
for (var chars=DIACRITICS[i].c,j=0;j<chars.length;j+=1)
DIACRITICSMAP[chars[j]]=DIACRITICS[i].b;
DIACRITICS = null;
var CONTENTTYPES = {
'aac': 'audio/aac',
'ai': 'application/postscript',
'appcache': 'text/cache-manifest',
'avi': 'video/avi',
'bin': 'application/octet-stream',
'bmp': 'image/bmp',
'coffee': 'text/coffeescript',
'css': 'text/css',
'csv': 'text/csv',
'doc': 'application/msword',
'docx': 'application/msword',
'dtd': 'application/xml-dtd',
'eps': 'application/postscript',
'exe': 'application/octet-stream',
'geojson': 'application/json',
'gif': 'image/gif',
'gzip': 'application/x-gzip',
'htm': 'text/html',
'html': 'text/html',
'ico': 'image/x-icon',
'ics': 'text/calendar',
'ifb': 'text/calendar',
'jpe': 'image/jpeg',
'jpeg': 'image/jpeg',
'jpg': 'image/jpeg',
'js': 'text/javascript',
'json': 'application/json',
'jsx': 'text/jsx',
'less': 'text/css',
'm4a': 'audio/mp4a-latm',
'm4v': 'video/x-m4v',
'manifest': 'text/cache-manifest',
'md': 'text/x-markdown',
'mid': 'audio/midi',
'midi': 'audio/midi',
'mov': 'video/quicktime',
'mp3': 'audio/mpeg',
'mp4': 'video/mp4',
'mpe': 'video/mpeg',
'mpeg': 'video/mpeg',
'mpg': 'video/mpeg',
'mpga': 'audio/mpeg',
'mtl': 'text/plain',
'mv4': 'video/mv4',
'obj': 'text/plain',
'ogg': 'application/ogg',
'ogv': 'video/ogg',
'package': 'text/plain',
'pdf': 'application/pdf',
'png': 'image/png',
'ppt': 'application/vnd.ms-powerpoint',
'pptx': 'application/vnd.ms-powerpoint',
'ps': 'application/postscript',
'rar': 'application/x-rar-compressed',
'rtf': 'text/rtf',
'sass': 'text/css',
'scss': 'text/css',
'sh': 'application/x-sh',
'stl': 'application/sla',
'svg': 'image/svg+xml',
'swf': 'application/x-shockwave-flash',
'tar': 'application/x-tar',
'tif': 'image/tiff',
'tiff': 'image/tiff',
'txt': 'text/plain',
'wav': 'audio/x-wav',
'webm': 'video/webm',
'webp': 'image/webp',
'woff': 'application/font-woff',
'woff2': 'application/font-woff2',
'xht': 'application/xhtml+xml',
'xhtml': 'application/xhtml+xml',
'xls': 'application/vnd.ms-excel',
'xlsx': 'application/vnd.ms-excel',
'xml': 'application/xml',
'xpm': 'image/x-xpixmap',
'xsl': 'application/xml',
'xslt': 'application/xslt+xml',
'zip': 'application/zip'
};
var dnscache = {};
const hasOwnProperty = Object.prototype.hasOwnProperty;
/**
* Checks if is object empty
* @param {Object} obj
* @return {Boolean}
*/
exports.isEmpty = function(obj) {
if (!obj)
return true;
if (obj.length)
return false;
for (var key in obj) {
if (hasOwnProperty.call(obj, key))
return false;
}
return true;
};
/**
* Compare objects
* @param {Object} obj1
* @param {Object} obj2
* @return {Boolean}
*/
exports.isEqual = function(obj1, obj2, properties) {
var keys = properties ? properties : Object.keys(obj1);
for (var i = 0, length = keys.length; i < length; i++) {
var key = keys[i];
var a = obj1[key];
var b = obj2[key];
var ta = typeof(a);
var tb = typeof(b);
if (ta !== tb)
return false;
if (a === b)
continue;
if (a instanceof Date && b instanceof Date) {
if (a.getTime() === b.getTime())
continue;
return false;
} else if (a instanceof Array && b instanceof Array) {
if (JSON.stringify(a) === JSON.stringify(b))
continue;
return false;
}
if (ta === 'object' && tb === 'object') {
if (exports.isEqual(a, b))
continue;
}
return false;
}
return true;
};
/**
* Function checks a valid function and waits for it positive result
* @param {Function} fnValid
* @param {Function(err, success)} fnCallback
* @param {Number} timeout Timeout, optional (default: 5000)
* @param {Number} interval Refresh interval, optional (default: 500)
*/
exports.wait = function(fnValid, fnCallback, timeout, interval) {
if (fnValid() === true)
return fnCallback(null, true);
var id_timeout = null;
var id_interval = setInterval(function() {
if (fnValid() === true) {
clearInterval(id_interval);
clearTimeout(id_timeout);
if (fnCallback)
fnCallback(null, true);
return;
}
}, interval || 500);
id_timeout = setTimeout(function() {
clearInterval(id_interval);
if (fnCallback)
fnCallback(new Error('Timeout.'), false);
}, timeout || 5000);
};
exports.$$wait = function(fnValid, timeout, interval) {
return function(callback) {
exports.wait(fnValid, callback, timeout, interval);
};
};
/**
* Resolves an IP from the URL address
* @param {String} url
* @param {Function(err, uri)} callback
*/
exports.resolve = function(url, callback) {
var uri = parser.parse(url);
if (!callback)
return dnscache[uri.host];
if (dnscache[uri.host]) {
uri.host = dnscache[uri.host];
callback(null, uri);
return;
}
Dns.resolve4(uri.hostname, function(e, addresses) {
if (!e) {
dnscache[uri.host] = addresses[0];
uri.host = addresses[0];
callback(null, uri);
return;
}
setImmediate(function() {
Dns.resolve4(uri.hostname, function(e, addresses) {
if (e)
return callback(e, uri);
dnscache[uri.host] = addresses[0];
uri.host = addresses[0];
callback(null, uri);
});
});
});
};
exports.$$resolve = function(url) {
return function(callback) {
return exports.resolve(url, callback);
};
};
/**
* Clears DNS cache
*/
exports.clearDNS = function() {
dnscache = {};
};
exports.keywords = function(content, forSearch, alternative, max_count, max_length, min_length) {
if (forSearch === undefined)
forSearch = true;
min_length = min_length || 2;
max_count = max_count || 200;
max_length = max_length || 20;
var words = [];
var isSoundex = alternative === 'soundex';
if (content instanceof Array) {
for (var i = 0, length = content.length; i < length; i++) {
if (!content[i])
continue;
var tmp = (forSearch ? content[i].removeDiacritics().toLowerCase().replace(/y/g, 'i') : content[i].toLowerCase()).replace(/\n/g, ' ').split(' ');
if (!tmp || !tmp.length)
continue;
for (var j = 0, jl = tmp.length; j < jl; j++)
words.push(tmp[j]);
}
} else
words = (forSearch ? content.removeDiacritics().toLowerCase().replace(/y/g, 'i') : content.toLowerCase()).replace(/\n/g, ' ').split(' ');
if (!words)
words = [];
var dic = {};
var counter = 0;
for (var i = 0, length = words.length; i < length; i++) {
var word = words[i].trim();
if (word.length < min_length)
continue;
if (counter >= max_count)
break;
if (forSearch)
word = word.replace(/\W|_/g, '');
// Gets 80% length of word
if (alternative) {
if (isSoundex)
word = word.soundex();
else {
var size = (word.length / 100) * 80;
if (size > min_length + 1)
word = word.substring(0, size);
}
}
if (word.length < min_length || word.length > max_length)
continue;
if (dic[word])
dic[word]++;
else
dic[word] = 1;
counter++;
}
var keys = Object.keys(dic);
keys.sort(function(a, b) {
var countA = dic[a];
var countB = dic[b];
if (countA > countB)
return -1;
if (countA < countB)
return 1;
return 0;
});
return keys;
};
/**
* Create a request to a specific URL
* @param {String} url URL address.
* @param {String Array} flags Request flags.
* @param {String or Object} data Request data (optional).
* @param {Function(error, content, statusCode, headers)} callback Callback.
* @param {Object} headers Custom cookies (optional, default: null).
* @param {Object} headers Custom headers (optional, default: null).
* @param {String} encoding Encoding (optional, default: UTF8)
* @param {Number} timeout Request timeout.
* return {Boolean}
*/
exports.request = function(url, flags, data, callback, cookies, headers, encoding, timeout) {
// No data (data is optinal argument)
if (typeof(data) === 'function') {
timeout = encoding;
encoding = headers;
headers = cookies;
cookies = callback;
callback = data;
data = '';
} else if (!data)
data = '';
if (typeof(cookies) === 'number') {
cookies = null;
timeout = cookies;
}
if (typeof(headers) === 'number') {
headers = null;
timeout = headers;
}
if (typeof(encoding) === 'number') {
encoding = null;
timeout = encoding;
}
if (callback === NOOP)
callback = null;
var options = { length: 0, timeout: 10000, evt: new events.EventEmitter(), encoding: typeof(encoding) !== 'string' ? ENCODING : encoding, callback: callback, post: false, redirect: 0 };
var method;
var type = 0;
if (headers)
headers = exports.extend({}, headers);
else
headers = {};
if (flags instanceof Array) {
for (var i = 0, length = flags.length; i < length; i++) {
// timeout
if (flags[i] > 0) {
options.timeout = flags[i];
continue;
}
if (flags[i][0] === '<') {
options.max = flags[i].substring(1).trim().parseInt() * 1024; // kB
continue;
}
switch (flags[i].toLowerCase()) {
case 'utf8':
case 'ascii':
case 'base64':
case 'binary':
case 'hex':
options.encoding = flags[i];
break;
case 'xhr':
headers['X-Requested-With'] = 'XMLHttpRequest';
break;
case 'plain':
headers['Content-Type'] = 'text/plain';
break;
case 'html':
headers['Content-Type'] = 'text/html';
break;
case 'json':
headers['Content-Type'] = 'application/json';
if (!method)
method = 'POST';
type = 1;
break;
case 'xml':
headers['Content-Type'] = 'text/xml';
if (!method)
method = 'POST';
type = 2;
break;
case 'get':
case 'options':
case 'head':
method = flags[i].toUpperCase();
break;
case 'upload':
headers['Content-Type'] = 'multipart/form-data';
break;
case 'post':
case 'put':
case 'delete':
case 'patch':
method = flags[i].toUpperCase();
if (!headers['Content-Type'])
headers['Content-Type'] = 'application/x-www-form-urlencoded';
break;
case 'dnscache':
options.resolve = true;
break;
}
}
}
if (method)
options.post = method === 'POST' || method === 'PUT' || method === 'DELETE' || method === 'PATCH';
else
method = 'GET';
if (typeof(data) !== 'string')
data = type === 1 ? JSON.stringify(data) : qs.stringify(data);
else if (data[0] === '?')
data = data.substring(1);
if (!options.post) {
if (data.length && url.indexOf('?') === -1)
url += '?' + data;
data = '';
}
if (cookies) {
var builder = '';
for (var m in cookies)
builder += (builder ? '; ' : '') + m + '=' + cookies[m];
if (builder)
headers['Cookie'] = builder;
}
if (data.length) {
options.data = new Buffer(data, ENCODING);
headers['Content-Length'] = options.data.length;
}
var uri = parser.parse(url);
uri.method = method;
uri.agent = false;
uri.headers = headers;
if (options.resolve) {
exports.resolve(url, function(err, u) {
if (!err)
uri.host = u.host;
request_call(uri, options);
});
} else
request_call(uri, options);
return options.evt;
};
function request_call(uri, options, counter) {
var connection = uri.protocol === 'https:' ? https : http;
var req = options.post ? connection.request(uri, (res) => request_response(res, uri, options)) : connection.get(uri, (res) => request_response(res, uri, options));
if (!options.callback) {
req.on('error', NOOP);
return;
}
req.on('error', function(err) {
if (!options.callback)
return;
options.callback(err, '', 0, undefined, uri.host);
options.callback = null;
options.evt.removeAllListeners();
options.evt = null;
});
req.setTimeout(options.timeout, function() {
if (!options.callback)
return;
options.callback(new Error(exports.httpStatus(408)), '', 0, undefined, uri.host);
options.callback = null;
options.evt.removeAllListeners();
options.evt = null;
});
req.on('response', (response) => response.req = req);
req.end(options.data);
}
function request_response(res, uri, options) {
res._buffer = null;
res._bufferlength = 0;
// We have redirect
if (res.statusCode === 301 || res.statusCode === 302) {
if (options.redirect > 3) {
if (options.callback) {
options.callback(new Error('Too many redirects.'), '', 0, undefined, uri.host);
options.callback = null;
}
if (options.evt) {
options.evt.removeAllListeners();
options.evt = null;
}
res.req.removeAllListeners();
res.req = null;
res.removeAllListeners();
res = null;
return;
}
options.redirect++;
var tmp = parser.parse(res.headers['location']);
tmp.headers = uri.headers;
tmp.agent = false;
tmp.method = uri.method;
res.req.removeAllListeners();
res.req = null;
if (!options.resolve) {
res.removeAllListeners();
res = null;
return request_call(tmp, options);
}
exports.resolve(res.headers['location'], function(err, u) {
if (!err)
tmp.host = u.host;
res.removeAllListeners();
res = null;
request_call(tmp, options);
});
return;
}
options.length = +res.headers['content-length'] || 0;
options.evt && options.evt.emit('begin', options.length);
res.on('data', function(chunk) {
var self = this;
if (options.max && self._bufferlength > options.max)
return;
if (self._buffer)
self._buffer = Buffer.concat([self._buffer, chunk]);
else
self._buffer = chunk;
self._bufferlength += chunk.length;
options.evt && options.evt.emit('data', chunk, options.length ? (self._bufferlength / options.length) * 100 : 0);
});
res.on('end', function() {
var self = this;
var str = self._buffer ? self._buffer.toString(options.encoding) : '';
self._buffer = undefined;
if (options.evt) {
options.evt.emit('end', str, self.statusCode, self.headers, uri.host);
options.evt.removeAllListeners();
options.evt = null;
}
if (options.callback) {
options.callback(null, uri.method === 'HEAD' ? self.headers : str, self.statusCode, self.headers, uri.host);
options.callback = null;
}
res.req && res.req.removeAllListeners();
res.removeAllListeners();
});
res.resume();
}
exports.$$request = function(url, flags, data, cookies, headers, encoding, timeout) {
return function(callback) {
exports.request(url, flags, data, callback, cookies, headers, encoding, timeout);
};
};
exports.btoa = function(str) {
return (str instanceof Buffer) ? str.toString('base64') : new Buffer(str.toString(), 'binary').toString('base64');
};
exports.atob = function(str) {
return new Buffer(str, 'base64').toString('binary');
};
/**
* Create a request to a specific URL
* @param {String} url URL address.
* @param {String Array} flags Request flags.
* @param {String or Object} data Request data (optional).
* @param {Function(error, response)} callback Callback.
* @param {Object} cookies Custom cookies (optional, default: null).
* @param {Object} headers Custom headers (optional, default: null).
* @param {String} encoding Encoding (optional, default: UTF8)
* @param {Number} timeout Request timeout.
* return {Boolean}
*/
exports.download = function(url, flags, data, callback, cookies, headers, encoding, timeout) {
// No data (data is optinal argument)
if (typeof(data) === 'function') {
timeout = encoding;
encoding = headers;
headers = cookies;
cookies = callback;
callback = data;
data = '';
}
if (typeof(cookies) === 'number') {
cookies = null;
timeout = cookies;
}
if (typeof(headers) === 'number') {
headers = null;
timeout = headers;
}
if (typeof(encoding) === 'number') {
encoding = null;
timeout = encoding;
}
if (typeof(encoding) !== 'string')
encoding = ENCODING;
var method = 'GET';
var type = 0;
var options = { callback: callback, resolve: false, length: 0, evt: new events.EventEmitter(), timeout: timeout || 60000, post: false, encoding: encoding };
if (headers)
headers = exports.extend({}, headers);
else
headers = {};
if (data === null)
data = '';
if (flags instanceof Array) {
for (var i = 0, length = flags.length; i < length; i++) {
// timeout
if (flags[i] > 0) {
options.timeout = flags[i];
continue;
}
if (flags[i][0] === '<') {
// max length is not supported
continue;
}
switch (flags[i].toLowerCase()) {
case 'utf8':
case 'ascii':
case 'base64':
case 'binary':
case 'hex':
options.encoding = flags[i];
break;
case 'xhr':
headers['X-Requested-With'] = 'XMLHttpRequest';
break;
case 'plain':
headers['Content-Type'] = 'text/plain';
break;
case 'html':
headers['Content-Type'] = 'text/html';
break;
case 'json':
headers['Content-Type'] = 'application/json';
type = 1;
break;
case 'xml':
headers['Content-Type'] = 'text/xml';
type = 2;
break;
case 'get':
case 'head':
case 'options':
method = flags[i].toUpperCase();
break;
case 'upload':
headers['Content-Type'] = 'multipart/form-data';
break;
case 'post':
case 'patch':
case 'delete':
case 'put':
method = flags[i].toUpperCase();
if (!headers['Content-Type'])
headers['Content-Type'] = 'application/x-www-form-urlencoded';
break;
case 'dnscache':
options.resolve = true;
break;
}
}
}
options.post = method === 'POST' || method === 'PUT' || method === 'DELETE' || method === 'PATCH';
if (typeof(data) !== 'string')
data = type === 1 ? JSON.stringify(data) : qs.stringify(data);
else if (data[0] === '?')
data = data.substring(1);
if (!options.post) {
if (data.length && url.indexOf('?') === -1)
url += '?' + data;
data = '';
}
if (cookies) {
var builder = '';
for (var m in cookies)
builder += (builder ? '; ' : '') + m + '=' + cookies[m];
if (builder)
headers['Cookie'] = builder;
}
var uri = parser.parse(url);
uri.method = method;
uri.agent = false;
uri.headers = headers;
if (data.length) {
options.data = new Buffer(data, ENCODING);
headers['Content-Length'] = options.data.length;
}
if (options.resolve) {
exports.resolve(url, function(err, u) {
if (!err)
uri.host = u.host;
download_call(uri, options);
});
} else
download_call(uri, options);
return options.evt;
};
function download_call(uri, options) {
options.length = 0;
var connection = uri.protocol === 'https:' ? https : http;
var req = options.post ? connection.request(uri, (res) => download_response(res, uri, options)) : connection.get(uri, (res) => download_response(res, uri, options));
if (!options.callback) {
req.on('error', NOOP);
return;
}
req.on('error', function(err) {
if (!options.callback)
return;
options.callback(err);
options.callback = null;
options.evt.removeAllListeners();
options.evt = null;
});
req.setTimeout(options.timeout, function() {
if (!options.callback)
return;
options.callback(new Error(exports.httpStatus(408)));
options.callback = null;
options.evt.removeAllListeners();
options.evt = null;
});
req.on('response', function(response) {
response.req = req;
options.length = +response.headers['content-length'] || 0;
options.evt && options.evt.emit('begin', options.length);
});
req.end(options.data);
}
function download_response(res, uri, options) {
res._bufferlength = 0;
// We have redirect
if (res.statusCode === 301 || res.statusCode === 302) {
if (options.redirect > 3) {
options.callback && options.callback(new Error('Too many redirects.'));
res.req.removeAllListeners();
res.req = null;
res.removeAllListeners();
res = null;
return;
}
options.redirect++;
var tmp = parser.parse(res.headers['location']);
tmp.headers = uri.headers;
tmp.agent = false;
tmp.method = uri.method;
res.req.removeAllListeners();
res.req = null;
if (!options.resolve) {
res.removeAllListeners();
res = null;
return download_call(tmp, options);
}
exports.resolve(res.headers['location'], function(err, u) {
if (!err)
tmp.host = u.host;
res.removeAllListeners();
res = null;
download_call(tmp, options);
});
return;
}
res.on('data', function(chunk) {
var self = this;
self._bufferlength += chunk.length;
options.evt && options.evt.emit('data', chunk, options.length ? (self._bufferlength / options.length) * 100 : 0);
});
res.on('end', function() {
var self = this;
var str = self._buffer ? self._buffer.toString(options.encoding) : '';
self._buffer = undefined;
if (options.evt) {
options.evt.emit('end', str, self.statusCode, self.headers, uri.host);
options.evt.removeAllListeners();
options.evt = null;
}
res.req && res.req.removeAllListeners();
res.removeAllListeners();
});
res.resume();
options.callback && options.callback(null, res, res.statusCode, res.headers, uri.host);
}
exports.$$download = function(url, flags, data, cookies, headers, encoding, timeout) {
return function(callback) {
exports.download(url, flags, data, callback, cookies, headers, encoding, timeout);
};
};
/**
* Send a stream through HTTP