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<!DOCTYPE html>
<html>
<head>
<title>index.js</title>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<meta name="viewport" content="width=device-width, target-densitydpi=160dpi, initial-scale=1.0; maximum-scale=1.0; user-scalable=0;">
<link rel="stylesheet" media="all" href="docco.css" />
</head>
<body>
<div id="container">
<div id="background"></div>
<ul class="sections">
<li id="title">
<div class="annotation">
<h1>index.js</h1>
</div>
</li>
<li id="section-1">
<div class="annotation">
<div class="pilwrap ">
<a class="pilcrow" href="#section-1">¶</a>
</div>
<p>INDEX.JS</p>
</div>
<div class="content"><div class='highlight'><pre><span class="hljs-comment">/** Copyright (c) 2018 Craig Yamato */</span>
<span class="hljs-comment">/**
* @fileoverview The SyslogPro module for sending syslog messages
* Most APIs will return a promise. These APIs can be used using
* `then(...)/catch(...)`
*
* Syslog formatting classes can be used as input into a Syslog class to be used
* simultaneously to the same Syslog server. The Syslog Class with a configured
* Syslog server target can also be used as the input into each of the
* formatting classes so that they may run independently.
* @author Craig Yamato <[email protected]>
* @copyright (c) 2018 - Craig Yamato
* @version 0.1.0
* @exports Syslog
* @exports LEEF
* @exports CEF
* @module SyslogPro
*/</span>
<span class="hljs-meta">'use strict'</span>;
<span class="hljs-keyword">const</span> moment = <span class="hljs-built_in">require</span>(<span class="hljs-string">'moment'</span>);
<span class="hljs-keyword">const</span> os = <span class="hljs-built_in">require</span>(<span class="hljs-string">'os'</span>);
<span class="hljs-keyword">const</span> dns = <span class="hljs-built_in">require</span>(<span class="hljs-string">'dns'</span>);
<span class="hljs-keyword">let</span> dnsPromises = dns.promises;
<span class="hljs-keyword">const</span> fs = <span class="hljs-built_in">require</span>(<span class="hljs-string">'fs'</span>);
<span class="hljs-comment">/**
* Format the ANSI foreground color code from a RGB hex code or ANSI color code
* @private
* @param {string} hex - The color hex code in the form of #FFFFFF or Number of
* the ANSI color code (30-37 Standard & 0-255 Extended)
* @returns {Promise} - The formatted ANSI color code
* @throws {Error} - A Format Error
*/</span>
<span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-title">rgbToAnsi</span>(<span class="hljs-params">hex,
extendedColor</span>) </span>{
<span class="hljs-keyword">return</span> <span class="hljs-keyword">new</span> <span class="hljs-built_in">Promise</span>(<span class="hljs-function">(<span class="hljs-params">resolve, reject</span>) =></span> {
<span class="hljs-keyword">let</span> colorCode = <span class="hljs-number">0</span>; <span class="hljs-comment">// Var to hold color code</span></pre></div></div>
</li>
<li id="section-2">
<div class="annotation">
<div class="pilwrap ">
<a class="pilcrow" href="#section-2">¶</a>
</div>
<p>Break HEX Code up into RGB</p>
</div>
<div class="content"><div class='highlight'><pre> <span class="hljs-keyword">const</span> hexParts = <span class="hljs-regexp">/^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i</span>.exec(hex);
<span class="hljs-keyword">if</span> (hexParts || <span class="hljs-keyword">typeof</span> hex === <span class="hljs-string">'number'</span>) {
<span class="hljs-keyword">if</span> (<span class="hljs-keyword">typeof</span> hex === <span class="hljs-string">'number'</span>) {
<span class="hljs-keyword">if</span> (extendedColor && hex < <span class="hljs-number">256</span>) {
resolve(hex);
} <span class="hljs-keyword">else</span> <span class="hljs-keyword">if</span> ((hex > <span class="hljs-number">29</span> && hex < <span class="hljs-number">38</span>) || (hex > <span class="hljs-number">89</span> && hex < <span class="hljs-number">98</span>)) {
resolve(hex);
} <span class="hljs-keyword">else</span> {
reject(<span class="hljs-keyword">new</span> <span class="hljs-built_in">Error</span>(<span class="hljs-string">'FORMAT ERROR: Color code not in range'</span>));
}
} <span class="hljs-keyword">else</span> {
<span class="hljs-keyword">const</span> r = <span class="hljs-built_in">parseInt</span>(hexParts[<span class="hljs-number">1</span>], <span class="hljs-number">16</span>);
<span class="hljs-keyword">const</span> g = <span class="hljs-built_in">parseInt</span>(hexParts[<span class="hljs-number">2</span>], <span class="hljs-number">16</span>);
<span class="hljs-keyword">const</span> b = <span class="hljs-built_in">parseInt</span>(hexParts[<span class="hljs-number">3</span>], <span class="hljs-number">16</span>);
<span class="hljs-keyword">if</span> (extendedColor) {
<span class="hljs-keyword">if</span> (r === g && g === b) {</pre></div></div>
</li>
<li id="section-3">
<div class="annotation">
<div class="pilwrap ">
<a class="pilcrow" href="#section-3">¶</a>
</div>
<p>Gray Scale Color</p>
</div>
<div class="content"><div class='highlight'><pre> <span class="hljs-keyword">if</span> (r < <span class="hljs-number">8</span>) {
colorCode = <span class="hljs-number">16</span>;
} <span class="hljs-keyword">else</span> <span class="hljs-keyword">if</span> (r > <span class="hljs-number">248</span>) {
colorCode = <span class="hljs-number">231</span>;
} <span class="hljs-keyword">else</span> {
colorCode = <span class="hljs-built_in">Math</span>.round(((r - <span class="hljs-number">8</span>) / <span class="hljs-number">247</span>) * <span class="hljs-number">24</span>) + <span class="hljs-number">232</span>;
}
} <span class="hljs-keyword">else</span> {
colorCode = <span class="hljs-number">16</span>
+ (<span class="hljs-number">36</span> * <span class="hljs-built_in">Math</span>.round(r / <span class="hljs-number">255</span> * <span class="hljs-number">5</span>))
+ (<span class="hljs-number">6</span> * <span class="hljs-built_in">Math</span>.round(g / <span class="hljs-number">255</span> * <span class="hljs-number">5</span>))
+ <span class="hljs-built_in">Math</span>.round(b / <span class="hljs-number">255</span> * <span class="hljs-number">5</span>);
}
} <span class="hljs-keyword">else</span> {
colorCode = <span class="hljs-number">30</span>;
<span class="hljs-keyword">const</span> red = r / <span class="hljs-number">255</span>;
<span class="hljs-keyword">const</span> green = g / <span class="hljs-number">255</span>;
<span class="hljs-keyword">const</span> blue = b / <span class="hljs-number">255</span>;
<span class="hljs-keyword">let</span> v = <span class="hljs-built_in">Math</span>.max(red, green, blue) * <span class="hljs-number">100</span>;
v = <span class="hljs-built_in">Math</span>.round(v / <span class="hljs-number">50</span>);
<span class="hljs-keyword">if</span> (v === <span class="hljs-number">1</span>) {
colorCode += ((<span class="hljs-built_in">Math</span>.round(b / <span class="hljs-number">255</span>) << <span class="hljs-number">2</span>)
| (<span class="hljs-built_in">Math</span>.round(g / <span class="hljs-number">255</span>) << <span class="hljs-number">1</span>)
| <span class="hljs-built_in">Math</span>.round(r / <span class="hljs-number">255</span>));
}
<span class="hljs-keyword">if</span> (v === <span class="hljs-number">2</span>) {
colorCode += <span class="hljs-number">60</span>;
}
}
}
resolve(colorCode);
<span class="hljs-keyword">return</span>;
} <span class="hljs-keyword">else</span> {
reject(<span class="hljs-keyword">new</span> <span class="hljs-built_in">Error</span>(<span class="hljs-string">'TYPE ERROR: Not in RGB color hex or color code'</span>));
<span class="hljs-keyword">return</span>;
}
});
}
<span class="hljs-comment">/**
* A class to work with syslog messages using UDP, TCP, or TLS transport.
* There is support for Syslog message formatting RFC-3164, RFC-5424 including
* Structured Data, IBM LEEF (Log Event Extended Format), and HP CEF (Common
* Event Format).
* Syslog formatting classes can be used as input into a Syslog class to be used
* simultaneously to the same Syslog server. *
* @requires moment
* @version 0.0.0
* @since 0.0.0
*/</span>
<span class="hljs-class"><span class="hljs-keyword">class</span> <span class="hljs-title">Syslog</span> </span>{
<span class="hljs-comment">/**
* Construct a new Syslog transport object with user options
* @public
* @version 0.0.0
* @since 0.0.0
* @this Syslog
* @param {object} [options] - Options object
* >>>Transport Configuration
* @param {string} [options.target='localhost'] - The IP Address|FQDN of the
* Syslog Server, this option if set will take presidents over any target
* set in a formatting object
* @param {string} [options.protocol='udp'] - L4 transport protocol
* (udp|tcp|tls), this option if set will take presidents over any
* transport set in a formatting object
* @param {number} [options.port=514] - IP port, this option if set will take
* presidents over any IP Port set in a formatting object
* @param {number} [options.tcpTimeout=10000] - Ignored for all other
* transports, this option if set will take presidents over any timeout
* set in a formatting object
* @param {string[]} [options.tlsServerCerts] - Array of authorized TLS server
* certificates file locations, this option if set will take presidents
* over any certificates set in a formatting object
* @param {string} [options.tlsClientCert] - Client TLS certificate file
* location that this client should use, this option if set will take
* presidents over any certificates set in a formatting object
* @param {string} [options.tlsClientKey] - Client TLS key file
* location that this client should use, this option if set will take
* presidents over any certificates set in a formatting object
* >>>Syslog Format Settings
* @param {string} [options.format='none'] - Valid syslog format options for
* this module are 'none', 'rfc3164', 'rfc5424', 'leef', 'cef'
* @param {RFC3164} [options.rfc5424] - {@link module:SyslogPro~RFC5424|
* RFC5424 related settings}
* @param {RFC5424} [options.rfc5424] - {@link module:SyslogPro~RFC5424|
* RFC5424 related settings}
* @param {LEEF} [options.leef] - {@link module:SyslogPro~LEEF|IBM LEEF
* (Log Event Extended Format) object}
* @param {CEF} [options.cef] - {@link module:SyslogPro~CEF|HP CEF
* (Common Event Format) formatting object}
*/</span>
<span class="hljs-keyword">constructor</span>(options) {
<span class="hljs-keyword">this</span>.constructor__ = <span class="hljs-literal">true</span>;
<span class="hljs-keyword">if</span> (!options) {
options = {};
}</pre></div></div>
</li>
<li id="section-4">
<div class="annotation">
<div class="pilwrap ">
<a class="pilcrow" href="#section-4">¶</a>
</div>
<p>Basic transport setup</p>
</div>
<div class="content"><div class='highlight'><pre> <span class="hljs-comment">/** @type {string} */</span>
<span class="hljs-keyword">this</span>.target = options.target || <span class="hljs-string">'localhost'</span>;
<span class="hljs-comment">/** @type {string} */</span>
<span class="hljs-keyword">this</span>.protocol = options.protocol || <span class="hljs-string">'udp'</span>;
<span class="hljs-keyword">this</span>.protocol = <span class="hljs-keyword">this</span>.protocol.toLowerCase();
<span class="hljs-comment">/** @type {number} */</span>
<span class="hljs-keyword">this</span>.port = options.port || <span class="hljs-number">514</span>;
<span class="hljs-comment">/** @type {number} */</span>
<span class="hljs-keyword">this</span>.tcpTimeout = options.tcpTimeout || <span class="hljs-number">10000</span>;
<span class="hljs-keyword">if</span> ((<span class="hljs-keyword">typeof</span> options.tlsServerCerts === <span class="hljs-string">'object'</span>
&& <span class="hljs-built_in">Array</span>.isArray(options.tlsServerCerts))
|| <span class="hljs-keyword">typeof</span> options.tlsServerCerts === <span class="hljs-string">'string'</span>) {
<span class="hljs-keyword">this</span>.addTlsServerCerts(options.tlsServerCerts);
} <span class="hljs-keyword">else</span> {
<span class="hljs-comment">/** @type {string[]} */</span>
<span class="hljs-keyword">this</span>.tlsServerCerts = [];
}
<span class="hljs-keyword">if</span> (options.tlsClientCert) {
<span class="hljs-comment">/** @type {string} */</span>
<span class="hljs-keyword">this</span>.tlsClientCert = options.tlsClientCert;
}
<span class="hljs-keyword">if</span> (options.tlsClientKey) {
<span class="hljs-comment">/** @type {string} */</span>
<span class="hljs-keyword">this</span>.tlsClientKey = options.tlsClientKey;
}</pre></div></div>
</li>
<li id="section-5">
<div class="annotation">
<div class="pilwrap ">
<a class="pilcrow" href="#section-5">¶</a>
</div>
<p>Syslog Format</p>
</div>
<div class="content"><div class='highlight'><pre> <span class="hljs-keyword">if</span> (<span class="hljs-keyword">typeof</span> options.format === <span class="hljs-string">'string'</span>) {
<span class="hljs-comment">/** @type {string} */</span>
<span class="hljs-keyword">this</span>.format = options.format.toLowerCase();
} <span class="hljs-keyword">else</span> {
<span class="hljs-keyword">this</span>.format = options.format || <span class="hljs-string">'none'</span>;
}
<span class="hljs-keyword">if</span> (options.rfc3164) {
<span class="hljs-keyword">if</span> (options.rfc3164.constructor__) {
<span class="hljs-comment">/** @type {RFC3164} */</span>
<span class="hljs-keyword">this</span>.rfc3164 = options.rfc3164;
} <span class="hljs-keyword">else</span> {
<span class="hljs-keyword">this</span>.rfc3164 = <span class="hljs-keyword">new</span> RFC3164(options);
}
}
<span class="hljs-keyword">if</span> (options.rfc5424) {
<span class="hljs-keyword">if</span> (options.rfc5424.constructor__) {
<span class="hljs-comment">/** @type {RFC5424} */</span>
<span class="hljs-keyword">this</span>.rfc5424 = options.rfc5424;
} <span class="hljs-keyword">else</span> {
<span class="hljs-keyword">this</span>.rfc5424 = <span class="hljs-keyword">new</span> RFC5424(options);
}
}
<span class="hljs-keyword">if</span> (options.leef) {
<span class="hljs-keyword">if</span> (options.leef.constructor__) {
<span class="hljs-comment">/** @type {LEEF} */</span>
<span class="hljs-keyword">this</span>.leef = options.leef;
} <span class="hljs-keyword">else</span> {
<span class="hljs-keyword">this</span>.leef = <span class="hljs-keyword">new</span> LEEF(options);
}
}
<span class="hljs-keyword">if</span> (options.cef) {
<span class="hljs-keyword">if</span> (options.cef.constructor__) {
<span class="hljs-comment">/** @type {CEF} */</span>
<span class="hljs-keyword">this</span>.cef = options.cef;
} <span class="hljs-keyword">else</span> {
<span class="hljs-keyword">this</span>.cef = <span class="hljs-keyword">new</span> CEF(options);
}
}
<span class="hljs-keyword">if</span> (<span class="hljs-keyword">this</span>.format === <span class="hljs-string">'rfc3164'</span> && !<span class="hljs-keyword">this</span>.rfc3164) {
<span class="hljs-keyword">this</span>.rfc3164 = <span class="hljs-keyword">new</span> RFC3164();
}
<span class="hljs-keyword">if</span> (<span class="hljs-keyword">this</span>.format === <span class="hljs-string">'rfc5424'</span> && !<span class="hljs-keyword">this</span>.rfc5424) {
<span class="hljs-keyword">this</span>.rfc5424 = <span class="hljs-keyword">new</span> RFC5424();
}
<span class="hljs-keyword">if</span> (<span class="hljs-keyword">this</span>.format === <span class="hljs-string">'leef'</span> && !<span class="hljs-keyword">this</span>.leef) {
<span class="hljs-keyword">this</span>.leef = <span class="hljs-keyword">new</span> LEEF();
}
<span class="hljs-keyword">if</span> (<span class="hljs-keyword">this</span>.format === <span class="hljs-string">'cef'</span> && !<span class="hljs-keyword">this</span>.cef) {
<span class="hljs-keyword">this</span>.cef = <span class="hljs-keyword">new</span> CEF();
}
}
<span class="hljs-comment">/**
* Add a TLS server certificate which can be used to authenticate the server
* this syslog client is connecting too. This function will validate the
* input as a file location string and add it to an array of certificates
* @private
* @version 0.0.0
* @since 0.0.0
* @param {string|string[]} certs - File location of the certificate(s)
* @returns {Promise} - True
* @throws {Error} - A Type Error
*/</span>
addTlsServerCerts(certs) {
<span class="hljs-keyword">return</span> <span class="hljs-keyword">new</span> <span class="hljs-built_in">Promise</span>(<span class="hljs-function">(<span class="hljs-params">resolve, reject</span>) =></span> {
<span class="hljs-keyword">if</span> (<span class="hljs-keyword">typeof</span> certs === <span class="hljs-string">'object'</span> && <span class="hljs-built_in">Array</span>.isArray(certs)) {
<span class="hljs-comment">/** @private @type {string[]} */</span>
<span class="hljs-keyword">this</span>.tlsServerCerts = certs;
} <span class="hljs-keyword">else</span> <span class="hljs-keyword">if</span> (<span class="hljs-keyword">typeof</span> certs === <span class="hljs-string">'string'</span>) {
<span class="hljs-keyword">this</span>.tlsServerCerts = [certs];
} <span class="hljs-keyword">else</span> {
<span class="hljs-keyword">let</span> errMsg =
<span class="hljs-string">'TYPE ERROR: Server Cert file locations should be a string'</span>;
errMsg += <span class="hljs-string">' or array of strings'</span>;
reject(<span class="hljs-keyword">new</span> <span class="hljs-built_in">Error</span>(errMsg));
}
resolve(<span class="hljs-literal">true</span>);
});
}
<span class="hljs-comment">/**
* Send the Syslog message over UDP
* @private
* @param {string} msg - The formatted Syslog Message
* @returns {Promise} - The Syslog formatted string sent
* @throws {Error} - Network Error
*/</span>
udpMessage(msg) {
<span class="hljs-keyword">return</span> <span class="hljs-keyword">new</span> <span class="hljs-built_in">Promise</span>(<span class="hljs-function">(<span class="hljs-params">resolve, reject</span>) =></span> {</pre></div></div>
</li>
<li id="section-6">
<div class="annotation">
<div class="pilwrap ">
<a class="pilcrow" href="#section-6">¶</a>
</div>
<p>Test for target DNS and Address Family (IPv4/6) by looking up the DNS</p>
</div>
<div class="content"><div class='highlight'><pre> <span class="hljs-keyword">const</span> dgram = <span class="hljs-built_in">require</span>(<span class="hljs-string">'dgram'</span>);
<span class="hljs-keyword">const</span> dnsOptions = {
<span class="hljs-attr">verbatim</span>: <span class="hljs-literal">true</span>,
};
dnsPromises.lookup(<span class="hljs-keyword">this</span>.target, dnsOptions)
.then(<span class="hljs-function">(<span class="hljs-params">result</span>) =></span> {
<span class="hljs-keyword">const</span> udpType = result.family === <span class="hljs-number">4</span> ? <span class="hljs-string">'udp4'</span> : <span class="hljs-string">'udp6'</span>;
<span class="hljs-keyword">let</span> client = dgram.createSocket(udpType);</pre></div></div>
</li>
<li id="section-7">
<div class="annotation">
<div class="pilwrap ">
<a class="pilcrow" href="#section-7">¶</a>
</div>
<p>Turn msg in to a UTF8 buffer</p>
</div>
<div class="content"><div class='highlight'><pre> <span class="hljs-keyword">let</span> msgBuffer = Buffer.from(msg, <span class="hljs-string">'utf8'</span>);
client.send(msgBuffer, <span class="hljs-keyword">this</span>.port, <span class="hljs-keyword">this</span>.target, () => {
client.close();
resolve(msg);
});
})
.catch(<span class="hljs-function">(<span class="hljs-params">error</span>) =></span> {
reject(error); <span class="hljs-comment">// Reject out of the sendMessage function promise</span>
});
});
}
<span class="hljs-comment">/**
* Send the Syslog message over TCP
* @private
* @param {string} msg - The formatted Syslog Message
* @returns {Promise} - The Syslog formatted string sent
* @throws {Error} - Timeout error for TCP and TLS connections
* @throws {Error} - Network Error
*/</span>
tcpMessage(msg) {
<span class="hljs-keyword">return</span> <span class="hljs-keyword">new</span> <span class="hljs-built_in">Promise</span>(<span class="hljs-function">(<span class="hljs-params">resolve, reject</span>) =></span> {
<span class="hljs-keyword">const</span> net = <span class="hljs-built_in">require</span>(<span class="hljs-string">'net'</span>);
<span class="hljs-keyword">const</span> dnsOptions = {
<span class="hljs-attr">verbatim</span>: <span class="hljs-literal">true</span>,
};
dnsPromises.lookup(<span class="hljs-keyword">this</span>.target, dnsOptions)
.then(<span class="hljs-function">(<span class="hljs-params">result</span>) =></span> {
<span class="hljs-keyword">const</span> tcpOptions = {
<span class="hljs-attr">host</span>: <span class="hljs-keyword">this</span>.target,
<span class="hljs-attr">port</span>: <span class="hljs-keyword">this</span>.port,
<span class="hljs-attr">family</span>: result.family,
};
<span class="hljs-keyword">const</span> client = net.createConnection(tcpOptions, () => {</pre></div></div>
</li>
<li id="section-8">
<div class="annotation">
<div class="pilwrap ">
<a class="pilcrow" href="#section-8">¶</a>
</div>
<p>Turn msg in to a UTF8 buffer</p>
</div>
<div class="content"><div class='highlight'><pre> <span class="hljs-keyword">let</span> msgBuffer = Buffer.from(msg, <span class="hljs-string">'utf8'</span>);
client.write(msgBuffer, () => {
client.end();
});
});
client.setTimeout(<span class="hljs-keyword">this</span>.tcpTimeout);
client.on(<span class="hljs-string">'end'</span>, () => {
resolve(msg);
});
client.on(<span class="hljs-string">'timeout'</span>, () => {
client.end();
reject(<span class="hljs-keyword">new</span> <span class="hljs-built_in">Error</span>(<span class="hljs-string">'TIMEOUT ERROR: Syslog server TCP timeout'</span>));
});
client.on(<span class="hljs-string">'error'</span>, (error) => {
client.destroy();
reject(error);
});
})
.catch(<span class="hljs-function">(<span class="hljs-params">error</span>) =></span> {
reject(error);
});
});
}
<span class="hljs-comment">/**
* Send the Syslog message over TLS
* @private
* @param {string} msg - The formatted Syslog Message
* @returns {Promise} - The Syslog formatted string sent
* @throws {Error} - Timeout error for TCP and TLS connections
* @throws {Error} - Network Error
*/</span>
tlsMessage(msg) {
<span class="hljs-keyword">return</span> <span class="hljs-keyword">new</span> <span class="hljs-built_in">Promise</span>(<span class="hljs-function">(<span class="hljs-params">resolve, reject</span>) =></span> {
<span class="hljs-keyword">const</span> tls = <span class="hljs-built_in">require</span>(<span class="hljs-string">'tls'</span>);
<span class="hljs-keyword">const</span> tlsOptions = {
<span class="hljs-attr">host</span>: <span class="hljs-keyword">this</span>.target,
<span class="hljs-attr">port</span>: <span class="hljs-keyword">this</span>.port,
};</pre></div></div>
</li>
<li id="section-9">
<div class="annotation">
<div class="pilwrap ">
<a class="pilcrow" href="#section-9">¶</a>
</div>
<p>Load client cert and key if requested</p>
</div>
<div class="content"><div class='highlight'><pre> <span class="hljs-keyword">if</span> (<span class="hljs-keyword">typeof</span> <span class="hljs-keyword">this</span>.tlsClientKey === <span class="hljs-string">'string'</span>
&& <span class="hljs-keyword">typeof</span> <span class="hljs-keyword">this</span>.tlsClientCert === <span class="hljs-string">'string'</span>) {
tlsOptions.key = fs.readFileSync(<span class="hljs-keyword">this</span>.tlsClientKey);
tlsOptions.cert = fs.readFileSync(<span class="hljs-keyword">this</span>.tlsClientCert);
} <span class="hljs-keyword">else</span> <span class="hljs-keyword">if</span> (<span class="hljs-keyword">typeof</span> <span class="hljs-keyword">this</span>.tlsClientKey !== <span class="hljs-string">'string'</span>
&& <span class="hljs-keyword">typeof</span> <span class="hljs-keyword">this</span>.tlsClientKey !== <span class="hljs-string">'undefined'</span>) {
<span class="hljs-keyword">let</span> errMsg = <span class="hljs-string">'TYPE ERROR: TLS Client Key is not a file'</span>;
errMsg += <span class="hljs-string">'location string'</span>;
reject(<span class="hljs-keyword">new</span> <span class="hljs-built_in">Error</span>(errMsg));
<span class="hljs-keyword">return</span>;
} <span class="hljs-keyword">else</span> <span class="hljs-keyword">if</span> (<span class="hljs-keyword">typeof</span> <span class="hljs-keyword">this</span>.tlsClientCert !== <span class="hljs-string">'string'</span>
&& <span class="hljs-keyword">typeof</span> <span class="hljs-keyword">this</span>.tlsClientCert !== <span class="hljs-string">'undefined'</span>) {
<span class="hljs-keyword">let</span> errMsg = <span class="hljs-string">'TYPE ERROR: TLS Client Cert is not a file'</span>;
errMsg += <span class="hljs-string">'location string'</span>;
reject(<span class="hljs-keyword">new</span> <span class="hljs-built_in">Error</span>(errMsg));
<span class="hljs-keyword">return</span>;
}</pre></div></div>
</li>
<li id="section-10">
<div class="annotation">
<div class="pilwrap ">
<a class="pilcrow" href="#section-10">¶</a>
</div>
<p>Load any server certs if provided</p>
</div>
<div class="content"><div class='highlight'><pre> <span class="hljs-keyword">let</span> tlsCerts = <span class="hljs-keyword">this</span>.tlsServerCerts.length;
<span class="hljs-keyword">if</span> (tlsCerts > <span class="hljs-number">0</span>) {
<span class="hljs-keyword">let</span> tlsOptionsCerts = [];
<span class="hljs-keyword">for</span> (<span class="hljs-keyword">let</span> certIndex = <span class="hljs-number">0</span>; certIndex < tlsCerts; certIndex++) {
<span class="hljs-keyword">if</span> (<span class="hljs-keyword">typeof</span> <span class="hljs-keyword">this</span>.tlsServerCerts[certIndex] !== <span class="hljs-string">'string'</span>) {
<span class="hljs-keyword">let</span> errMsg = <span class="hljs-string">'TYPE ERROR: TLS Server Cert is not a file'</span>;
errMsg += <span class="hljs-string">'location string'</span>;
reject(<span class="hljs-keyword">new</span> <span class="hljs-built_in">Error</span>(errMsg));
}
<span class="hljs-keyword">let</span> cert = fs.readFileSync(<span class="hljs-keyword">this</span>.tlsServerCerts[certIndex]);
tlsOptionsCerts.push(cert);
}
tlsOptions.ca = tlsOptionsCerts;
tlsOptions.rejectUnauthorized = <span class="hljs-literal">true</span>;
}
<span class="hljs-keyword">const</span> client = tls.connect(tlsOptions, () => {</pre></div></div>
</li>
<li id="section-11">
<div class="annotation">
<div class="pilwrap ">
<a class="pilcrow" href="#section-11">¶</a>
</div>
<p>Turn msg in to a UTF8 buffer</p>
</div>
<div class="content"><div class='highlight'><pre> <span class="hljs-keyword">let</span> msgBuffer = Buffer.from(msg, <span class="hljs-string">'utf8'</span>);
client.write(msgBuffer, () => {
client.end();
});
});
client.setTimeout(<span class="hljs-keyword">this</span>.tcpTimeout);
client.on(<span class="hljs-string">'end'</span>, () => {
resolve(msg);
});
client.on(<span class="hljs-string">'timeout'</span>, () => {
client.end();
reject(<span class="hljs-keyword">new</span> <span class="hljs-built_in">Error</span>(<span class="hljs-string">'TIMEOUT ERROR: Syslog server TLS timeout'</span>));
});
client.on(<span class="hljs-string">'error'</span>, (error) => {
client.destroy();
reject(error);
});
});
}
<span class="hljs-comment">/**
* Send the Syslog message to the selected target Syslog server using the
* selected transport.
* @private
* @param {string} msg - The formatted Syslog Message
* @returns {Promise} - The Syslog formatted string sent
* @throws {Error} - Timeout error for TCP and TLS connections
* @throws {Error} - Network Error
*/</span>
send(msg) {
<span class="hljs-keyword">return</span> <span class="hljs-keyword">new</span> <span class="hljs-built_in">Promise</span>(<span class="hljs-function">(<span class="hljs-params">resolve, reject</span>) =></span> {
<span class="hljs-keyword">if</span> (<span class="hljs-keyword">typeof</span> msg !== <span class="hljs-string">'string'</span>) {
reject(<span class="hljs-keyword">new</span> <span class="hljs-built_in">Error</span>(<span class="hljs-string">'TYPE ERROR: Syslog message must be a string'</span>));
<span class="hljs-keyword">return</span>;
}
<span class="hljs-keyword">this</span>.protocol = <span class="hljs-keyword">this</span>.protocol.toLowerCase();
<span class="hljs-keyword">if</span> (<span class="hljs-keyword">this</span>.protocol === <span class="hljs-string">'udp'</span>) {
<span class="hljs-keyword">this</span>.udpMessage(msg)
.then(<span class="hljs-function">(<span class="hljs-params">result</span>) =></span> {
resolve(result);
})
.catch(<span class="hljs-function">(<span class="hljs-params">reson</span>) =></span> {
reject(reson);
});
} <span class="hljs-keyword">else</span> <span class="hljs-keyword">if</span> (<span class="hljs-keyword">this</span>.protocol === <span class="hljs-string">'tcp'</span>) {
<span class="hljs-keyword">this</span>.tcpMessage(msg)
.then(<span class="hljs-function">(<span class="hljs-params">result</span>) =></span> {
resolve(result);
})
.catch(<span class="hljs-function">(<span class="hljs-params">reson</span>) =></span> {
reject(reson);
});
} <span class="hljs-keyword">else</span> <span class="hljs-keyword">if</span> (<span class="hljs-keyword">this</span>.protocol === <span class="hljs-string">'tls'</span>) {
<span class="hljs-keyword">this</span>.tlsMessage(msg)
.then(<span class="hljs-function">(<span class="hljs-params">result</span>) =></span> {
resolve(result);
})
.catch(<span class="hljs-function">(<span class="hljs-params">reson</span>) =></span> {
reject(reson);
});
} <span class="hljs-keyword">else</span> {
<span class="hljs-keyword">let</span> errorMsg = <span class="hljs-string">'FORMAT ERROR: Protocol not recognized, should be '</span>;
errorMsg += <span class="hljs-string">'udp|tcp|tls'</span>;
reject(<span class="hljs-keyword">new</span> <span class="hljs-built_in">Error</span>(errorMsg));
}
});
}
}
<span class="hljs-comment">/**
* A class to work with RFC3164 formatted syslog messages. The messaging is
* fully configurable and ANSI foreground colors can be added. Both ANSI 8 and
* ANSI 256 color are fully supported. Most APIs will return a promise. These
* APIs can be used using `then(...)/catch(...)`
*
* A Syslog class with a configured
* Syslog server target can also be used as the input into the formatting
* classes so that it may run independently.
*
* The RFC3164 Syslog logging format is meant to be used as a stream of log data
* from a service or application. This class is designed to be used in this
* fashion where new messages are written to the class as needed.
* @requires moment
* @version 0.0.0
* @since 0.0.0
*/</span>
<span class="hljs-class"><span class="hljs-keyword">class</span> <span class="hljs-title">RFC3164</span> </span>{
<span class="hljs-comment">/**
* Construct a new RFC3164 formatted Syslog object with user options
* @public
* @this RFC3164
* @param {object} [options] - Options object
* @param {string} [options.applicationName='NodeJSLogger'] - Application
* @param {string} [options.hostname=os.hostname] - The name of this server
* @param {number} [options.facility=23] - Facility code to use sending this
* message
* @param {boolean} [options.color=false] - Apply color coding encoding tag
* with syslog message text
* @param {boolean} [options.extendedColor=false] - Use the extended ANSI
* color set encoding tag with syslog message text
* @param {object} [options.colors] - User defended colors for
* severities
* @param {string} [options.colors.emergencyColor] - A RGB Hex coded color in
* the form of #FFFFFF or as or the ANSI color code number (30-37 Standard
* & 0-255 Extended)
* @param {string} [options.colors.alertColor] - A RGB Hex coded color in the
* form of #FFFFFF or as or the ANSI color code number (30-37 Standard &
* 0-255 Extended)
* @param {string} [options.colors.criticalColor] - A RGB Hex coded color in
* the form of #FFFFFF or as or the ANSI color code number (30-37 Standard
* & 0-255 Extended)
* @param {string} [options.colors.errorColor] - A RGB Hex coded color in the
* form of #FFFFFF or as or the ANSI color code number (30-37 Standard &
* 0-255 Extended)
* @param {string} [options.colors.warningColor] - A RGB Hex coded color in
* the form of #FFFFFF or as or the ANSI color code number (30-37 Standard
* & 0-255 Extended)
* @param {string} [options.colors.noticeColor] - A RGB Hex coded color in the
* form of #FFFFFF or as or the ANSI color code number (30-37 Standard &
* 0-255 Extended)
* @param {string} [options.colors.informationalColor] - A RGB Hex coded color
* in the form of #FFFFFF or as or the ANSI color code number (30-37
* Standard & 0-255 Extended)
* @param {string} [options.colors.debugColor] - A RGB Hex coded color in the
* form of #FFFFFF or as or the ANSI color code number (30-37 Standard &
* 0-255 Extended)
* @param {Syslog} [options.server=false] - A {@link module:SyslogPro~Syslog|
* Syslog server connection} that should be used to send messages directly
* from this class. @see SyslogPro~Syslog
*/</span>
<span class="hljs-keyword">constructor</span>(options) {
<span class="hljs-comment">/** @private @type {boolean} */</span>
<span class="hljs-keyword">this</span>.constructor__ = <span class="hljs-literal">true</span>;
options = options || {};
<span class="hljs-keyword">this</span>.hostname = options.hostname || os.hostname();
<span class="hljs-keyword">this</span>.applicationName = options.applicationName || <span class="hljs-string">''</span>;
<span class="hljs-keyword">this</span>.facility = options.facility || <span class="hljs-number">23</span>;
<span class="hljs-keyword">if</span> (options.color) {
<span class="hljs-comment">/** @type {boolean} */</span>
<span class="hljs-keyword">this</span>.color = <span class="hljs-literal">true</span>;
} <span class="hljs-keyword">else</span> {
<span class="hljs-keyword">this</span>.color = <span class="hljs-literal">false</span>;
}
<span class="hljs-keyword">if</span> (options.extendedColor) {
<span class="hljs-comment">/** @type {boolean} */</span>
<span class="hljs-keyword">this</span>.extendedColor = <span class="hljs-literal">true</span>;
} <span class="hljs-keyword">else</span> {
<span class="hljs-keyword">this</span>.extendedColor = <span class="hljs-literal">false</span>;
}
<span class="hljs-keyword">if</span> (options.server) {
<span class="hljs-keyword">if</span> (!options.server.constructor__) {
<span class="hljs-comment">/** @private @type {Syslog} */</span>
<span class="hljs-keyword">this</span>.server = <span class="hljs-keyword">new</span> Syslog(options.server);
} <span class="hljs-keyword">else</span> {
<span class="hljs-keyword">this</span>.server = options.server;
}
}
<span class="hljs-keyword">if</span> (<span class="hljs-keyword">this</span>.extendedColor) {
<span class="hljs-comment">/** @private @type {number} */</span>
<span class="hljs-keyword">this</span>.emergencyColor = <span class="hljs-number">1</span>; <span class="hljs-comment">// Red foreground color</span>
<span class="hljs-comment">/** @private @type {number} */</span>
<span class="hljs-keyword">this</span>.alertColor = <span class="hljs-number">202</span>; <span class="hljs-comment">// Dark Orange foreground color</span>
<span class="hljs-comment">/** @private @type {number} */</span>
<span class="hljs-keyword">this</span>.criticalColor = <span class="hljs-number">208</span>; <span class="hljs-comment">// Orange foreground color</span>
<span class="hljs-comment">/** @private @type {number} */</span>
<span class="hljs-keyword">this</span>.errorColor = <span class="hljs-number">178</span>; <span class="hljs-comment">// Light Orange foreground color</span>
<span class="hljs-comment">/** @private @type {number} */</span>
<span class="hljs-keyword">this</span>.warningColor = <span class="hljs-number">226</span>; <span class="hljs-comment">// Yellow foreground color</span>
<span class="hljs-comment">/** @private @type {number} */</span>
<span class="hljs-keyword">this</span>.noticeColor = <span class="hljs-number">117</span>; <span class="hljs-comment">// Light Blue foreground color</span>
<span class="hljs-comment">/** @private @type {number} */</span>
<span class="hljs-keyword">this</span>.informationalColor = <span class="hljs-number">45</span>; <span class="hljs-comment">// Blue foreground color</span>
<span class="hljs-comment">/** @private @type {number} */</span>
<span class="hljs-keyword">this</span>.debugColor = <span class="hljs-number">27</span>; <span class="hljs-comment">// Dark Blue foreground color</span>
} <span class="hljs-keyword">else</span> {
<span class="hljs-keyword">this</span>.emergencyColor = <span class="hljs-number">31</span>; <span class="hljs-comment">// Red foreground color</span>
<span class="hljs-keyword">this</span>.alertColor = <span class="hljs-number">31</span>; <span class="hljs-comment">// Red foreground color</span>
<span class="hljs-keyword">this</span>.criticalColor = <span class="hljs-number">31</span>; <span class="hljs-comment">// Red foreground color</span>
<span class="hljs-keyword">this</span>.errorColor = <span class="hljs-number">33</span>; <span class="hljs-comment">// Yellow foreground color</span>
<span class="hljs-keyword">this</span>.warningColor = <span class="hljs-number">33</span>; <span class="hljs-comment">// Yellow foreground color</span>
<span class="hljs-keyword">this</span>.noticeColor = <span class="hljs-number">36</span>; <span class="hljs-comment">// Blue foreground color</span>
<span class="hljs-keyword">this</span>.informationalColor = <span class="hljs-number">36</span>; <span class="hljs-comment">// Blue foreground color</span>
<span class="hljs-keyword">this</span>.debugColor = <span class="hljs-number">34</span>; <span class="hljs-comment">// Dark Blue foreground color</span>
}
<span class="hljs-keyword">if</span> (<span class="hljs-keyword">typeof</span> options.colors === <span class="hljs-string">'object'</span>) {
<span class="hljs-keyword">this</span>.setColor(options.colors, <span class="hljs-keyword">this</span>.extendedColor);
}
}
<span class="hljs-comment">/**
* Sets the color to be used for messages at a set priority
* @public
* @param {string} [colors.emergencyColor] - A RGB Hex coded color in the form
* of #FFFFFF or as or the ANSI color code number (30-37 Standard & 0-255
* Extended)
* @param {string} [colors.alertColor] - A RGB Hex coded color in the form
* of #FFFFFF or as or the ANSI color code number (30-37 Standard & 0-255
* Extended)
* @param {string} [colors.criticalColor] - A RGB Hex coded color in the form
* of #FFFFFF or as or the ANSI color code number (30-37 Standard & 0-255
* Extended)
* @param {string} [colors.errorColor] - A RGB Hex coded color in the form
* of #FFFFFF or as or the ANSI color code number (30-37 Standard & 0-255
* Extended)
* @param {string} [colors.warningColor] - A RGB Hex coded color in the form
* of #FFFFFF or as or the ANSI color code number (30-37 Standard & 0-255
* Extended)
* @param {string} [colors.noticeColor] - A RGB Hex coded color in the form
* of #FFFFFF or as or the ANSI color code number (30-37 Standard & 0-255
* Extended)
* @param {string} [colors.informationalColor] - A RGB Hex coded color in the
* form of #FFFFFF or as or the ANSI color code number (30-37 Standard &
* 0-255 Extended)
* @param {string} [colors.debugColor] - A RGB Hex coded color in the form
* of #FFFFFF or as or the ANSI color code number (30-37 Standard & 0-255
* Extended)
* @throws {Error} A standard error object
*/</span>
setColor(colors, extendedColor) {
<span class="hljs-keyword">return</span> <span class="hljs-keyword">new</span> <span class="hljs-built_in">Promise</span>(<span class="hljs-function">(<span class="hljs-params">resolve, reject</span>) =></span> {
<span class="hljs-keyword">let</span> colorPromises = [];
<span class="hljs-keyword">if</span> (colors.emergencyColor) {
colorPromises.push(
<span class="hljs-keyword">new</span> <span class="hljs-built_in">Promise</span>(<span class="hljs-function">(<span class="hljs-params">resolve, reject</span>) =></span> {
rgbToAnsi(colors.emergencyColor, <span class="hljs-keyword">this</span>.extendedColor)
.then(<span class="hljs-function">(<span class="hljs-params">result</span>) =></span> {
<span class="hljs-keyword">this</span>.emergencyColor = result;
resolve(<span class="hljs-literal">true</span>);
})
.catch(<span class="hljs-function">(<span class="hljs-params">reson</span>) =></span> {
reson.message = <span class="hljs-string">'TYPE ERROR: '</span>;
reson.message += <span class="hljs-string">'emergencyColor'</span>;
reson.message += <span class="hljs-string">' Not in RGB color hex or color code'</span>;
reject(reson);
});
}));
}
<span class="hljs-keyword">if</span> (colors.alertColor) {
colorPromises.push(
<span class="hljs-keyword">new</span> <span class="hljs-built_in">Promise</span>(<span class="hljs-function">(<span class="hljs-params">resolve, reject</span>) =></span> {
rgbToAnsi(colors.alertColor, <span class="hljs-keyword">this</span>.extendedColor)
.then(<span class="hljs-function">(<span class="hljs-params">result</span>) =></span> {
<span class="hljs-keyword">this</span>.alertColor = result;
resolve(<span class="hljs-literal">true</span>);
})
.catch(<span class="hljs-function">(<span class="hljs-params">reson</span>) =></span> {
reson.message = <span class="hljs-string">'TYPE ERROR: '</span>;
reson.message += <span class="hljs-string">'alertColor'</span>;
reson.message += <span class="hljs-string">' Not in RGB color hex or color code'</span>;
reject(reson);
});
}));
}
<span class="hljs-keyword">if</span> (colors.criticalColor) {
colorPromises.push(
<span class="hljs-keyword">new</span> <span class="hljs-built_in">Promise</span>(<span class="hljs-function">(<span class="hljs-params">resolve, reject</span>) =></span> {
rgbToAnsi(colors.criticalColor, <span class="hljs-keyword">this</span>.extendedColor)
.then(<span class="hljs-function">(<span class="hljs-params">result</span>) =></span> {
<span class="hljs-keyword">this</span>.criticalColor = result;
resolve(<span class="hljs-literal">true</span>);
})
.catch(<span class="hljs-function">(<span class="hljs-params">reson</span>) =></span> {
reson.message = <span class="hljs-string">'TYPE ERROR: '</span>;
reson.message += <span class="hljs-string">'criticalColor'</span>;
reson.message += <span class="hljs-string">' Not in RGB color hex or color code'</span>;
reject(reson);
});
}));
}
<span class="hljs-keyword">if</span> (colors.errorColor) {
colorPromises.push(
<span class="hljs-keyword">new</span> <span class="hljs-built_in">Promise</span>(<span class="hljs-function">(<span class="hljs-params">resolve, reject</span>) =></span> {
rgbToAnsi(colors.errorColor, <span class="hljs-keyword">this</span>.extendedColor)
.then(<span class="hljs-function">(<span class="hljs-params">result</span>) =></span> {
<span class="hljs-keyword">this</span>.errorColor = result;
resolve(<span class="hljs-literal">true</span>);
})
.catch(<span class="hljs-function">(<span class="hljs-params">reson</span>) =></span> {
reson.message = <span class="hljs-string">'TYPE ERROR: '</span>;
reson.message += <span class="hljs-string">'errorColor'</span>;
reson.message += <span class="hljs-string">' Not in RGB color hex or color code'</span>;
reject(reson);
});
}));
}
<span class="hljs-keyword">if</span> (colors.warningColor) {
colorPromises.push(
<span class="hljs-keyword">new</span> <span class="hljs-built_in">Promise</span>(<span class="hljs-function">(<span class="hljs-params">resolve, reject</span>) =></span> {
rgbToAnsi(colors.warningColor, <span class="hljs-keyword">this</span>.extendedColor)
.then(<span class="hljs-function">(<span class="hljs-params">result</span>) =></span> {
<span class="hljs-keyword">this</span>.warningColor = result;
resolve(<span class="hljs-literal">true</span>);
})
.catch(<span class="hljs-function">(<span class="hljs-params">reson</span>) =></span> {
reson.message = <span class="hljs-string">'TYPE ERROR: '</span>;
reson.message += <span class="hljs-string">'warningColor'</span>;
reson.message += <span class="hljs-string">' Not in RGB color hex or color code'</span>;
reject(reson);
});
}));
}
<span class="hljs-keyword">if</span> (colors.noticeColor) {
colorPromises.push(
<span class="hljs-keyword">new</span> <span class="hljs-built_in">Promise</span>(<span class="hljs-function">(<span class="hljs-params">resolve, reject</span>) =></span> {
rgbToAnsi(colors.noticeColor, <span class="hljs-keyword">this</span>.extendedColor)
.then(<span class="hljs-function">(<span class="hljs-params">result</span>) =></span> {
<span class="hljs-keyword">this</span>.noticeColor = result;
resolve(<span class="hljs-literal">true</span>);
})
.catch(<span class="hljs-function">(<span class="hljs-params">reson</span>) =></span> {
reson.message = <span class="hljs-string">'TYPE ERROR: '</span>;
reson.message += <span class="hljs-string">'noticeColor'</span>;
reson.message += <span class="hljs-string">' Not in RGB color hex or color code'</span>;
reject(reson);
});
}));
}
<span class="hljs-keyword">if</span> (colors.informationalColor) {
colorPromises.push(
<span class="hljs-keyword">new</span> <span class="hljs-built_in">Promise</span>(<span class="hljs-function">(<span class="hljs-params">resolve, reject</span>) =></span> {
rgbToAnsi(colors.informationalColor, <span class="hljs-keyword">this</span>.extendedColor)
.then(<span class="hljs-function">(<span class="hljs-params">result</span>) =></span> {
<span class="hljs-keyword">this</span>.informationalColor = result;
resolve(<span class="hljs-literal">true</span>);
})
.catch(<span class="hljs-function">(<span class="hljs-params">reson</span>) =></span> {
reson.message = <span class="hljs-string">'TYPE ERROR: '</span>;
reson.message += <span class="hljs-string">'informationalColor'</span>;
reson.message += <span class="hljs-string">' Not in RGB color hex or color code'</span>;
reject(reson);
});
}));
}
<span class="hljs-keyword">if</span> (colors.debugColor) {
colorPromises.push(
<span class="hljs-keyword">new</span> <span class="hljs-built_in">Promise</span>(<span class="hljs-function">(<span class="hljs-params">resolve, reject</span>) =></span> {
rgbToAnsi(colors.debugColor, <span class="hljs-keyword">this</span>.extendedColor)
.then(<span class="hljs-function">(<span class="hljs-params">result</span>) =></span> {
<span class="hljs-keyword">this</span>.debugColor = result;
resolve(<span class="hljs-literal">true</span>);
})
.catch(<span class="hljs-function">(<span class="hljs-params">reson</span>) =></span> {
reson.message = <span class="hljs-string">'TYPE ERROR: '</span>;
reson.message += <span class="hljs-string">'debugColor'</span>;
reson.message += <span class="hljs-string">' Not in RGB color hex or color code'</span>;
reject(reson);
});
}));
}
<span class="hljs-built_in">Promise</span>.all(colorPromises)
.then(<span class="hljs-function">(<span class="hljs-params">results</span>) =></span> {
resolve(<span class="hljs-literal">true</span>);
})
.catch(<span class="hljs-function">(<span class="hljs-params">reson</span>) =></span> {
reject(reson);
});
});
}
<span class="hljs-comment">/**
* Building a formatted message. Returns a promise with a formatted message
* @public
* @param {string} msg - The Syslog Message
* @param {object} [options] - Options object
* @param {number} [options.severity=7] - An array of structure
* @param {number} [options.colorCode=36] - The ANSI color code to use if
* message coloration is selected
* @returns {Promise} A Syslog formatted string according to the selected RFC
* @throws {Error} A standard error object
*/</span>
buildMessage(msg, options) {
<span class="hljs-keyword">return</span> <span class="hljs-keyword">new</span> <span class="hljs-built_in">Promise</span>(<span class="hljs-function">(<span class="hljs-params">resolve, reject</span>) =></span> {
options = options || {};
<span class="hljs-keyword">let</span> severity = <span class="hljs-keyword">typeof</span> options.severity === <span class="hljs-string">'number'</span> ?
options.severity : <span class="hljs-number">6</span>;
<span class="hljs-keyword">if</span> (<span class="hljs-keyword">typeof</span> msg !== <span class="hljs-string">'string'</span> || options.msgSeverity > <span class="hljs-number">7</span>) {
<span class="hljs-keyword">let</span> errMsg = <span class="hljs-string">'FORMAT ERROR: Syslog message must be a string'</span>;
errMsg += <span class="hljs-string">' msgSeverity must be a number between 0 and 7'</span>;
reject(<span class="hljs-keyword">new</span> <span class="hljs-built_in">Error</span>(errMsg));
<span class="hljs-keyword">return</span>;
}
<span class="hljs-keyword">let</span> fmtMsg = <span class="hljs-string">''</span>; <span class="hljs-comment">// Formatted Syslog message string var</span>
<span class="hljs-keyword">const</span> newLine = <span class="hljs-string">'\n'</span>;
<span class="hljs-keyword">const</span> newLineRegEx = <span class="hljs-regexp">/(\r|\n|(\r\n))/</span>;
<span class="hljs-keyword">const</span> escapeCode = <span class="hljs-string">'\u001B'</span>;
<span class="hljs-keyword">const</span> resetColor = <span class="hljs-string">'\u001B[0m'</span>;</pre></div></div>
</li>
<li id="section-12">
<div class="annotation">
<div class="pilwrap ">
<a class="pilcrow" href="#section-12">¶</a>
</div>
<p>The PRI is common to both RFC formats</p>
</div>
<div class="content"><div class='highlight'><pre> <span class="hljs-keyword">const</span> pri = (<span class="hljs-keyword">this</span>.facility * <span class="hljs-number">8</span>) + severity;</pre></div></div>
</li>
<li id="section-13">
<div class="annotation">
<div class="pilwrap ">
<a class="pilcrow" href="#section-13">¶</a>
</div>
<p>Remove any newline character</p>
</div>
<div class="content"><div class='highlight'><pre> msg = msg.replace(newLineRegEx, <span class="hljs-string">''</span>);</pre></div></div>
</li>
<li id="section-14">
<div class="annotation">
<div class="pilwrap ">
<a class="pilcrow" href="#section-14">¶</a>
</div>
<p>Add requested color</p>
</div>
<div class="content"><div class='highlight'><pre> <span class="hljs-keyword">if</span> (<span class="hljs-keyword">this</span>.color) {
options.msgColor = options.msgColor || <span class="hljs-number">36</span>;
<span class="hljs-keyword">let</span> colorCode = <span class="hljs-string">'['</span>;
<span class="hljs-keyword">if</span> (<span class="hljs-keyword">this</span>.extendedColor) {
colorCode += <span class="hljs-string">'38;5;'</span>; <span class="hljs-comment">// Extended 256 Colors ANSI Code</span>
}
<span class="hljs-keyword">if</span> (<span class="hljs-keyword">typeof</span> options.msgColor === <span class="hljs-string">'number'</span>) {
colorCode += options.msgColor;
colorCode += <span class="hljs-string">'m'</span>; <span class="hljs-comment">// ANSI Color Closer</span>
} <span class="hljs-keyword">else</span> {
colorCode = <span class="hljs-string">'[39m'</span>; <span class="hljs-comment">// Use terminal's default color</span>
}
msg = escapeCode + colorCode + msg + resetColor;
}</pre></div></div>
</li>
<li id="section-15">
<div class="annotation">
<div class="pilwrap ">
<a class="pilcrow" href="#section-15">¶</a>
</div>
<p>RegEx to find a leading 0 in the day of a DateTime for RFC3164 RFC3164