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<!doctype html>
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<title>Code coverage report for lib/connect-logger.js</title>
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<h1>
<a href="../index.html">All files</a> / <a href="index.html">lib</a> connect-logger.js
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<div class='fl pad1y space-right2'>
<span class="strong">3.33% </span>
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<span class="cline-any cline-neutral">&nbsp;</span></td><td class="text"><pre class="prettyprint lang-js">/* eslint-disable no-plusplus */
&nbsp;
'use strict';
&nbsp;
const levels = require('./levels');
&nbsp;
const DEFAULT_FORMAT = ':remote-addr - -' +
' ":method :url HTTP/:http-version"' +
' :status :content-length ":referrer"' +
' ":user-agent"';
&nbsp;
/**
* Log requests with the given `options` or a `format` string.
*
* Options:
*
* - `format` Format string, see below for tokens
* - `level` A log4js levels instance. Supports also 'auto'
* - `nolog` A string or RegExp to exclude target logs
*
* Tokens:
*
* - `:req[header]` ex: `:req[Accept]`
* - `:res[header]` ex: `:res[Content-Length]`
* - `:http-version`
* - `:response-time`
* - `:remote-addr`
* - `:date`
* - `:method`
* - `:url`
* - `:referrer`
* - `:user-agent`
* - `:status`
*
* @return {Function}
* @param logger4js
* @param options
* @api public
*/
function <span class="fstat-no" title="function not covered" >getLogger(</span>logger4js, options) {
/* eslint no-underscore-dangle:0 */
<span class="cstat-no" title="statement not covered" > if (typeof options === 'object') {</span>
<span class="cstat-no" title="statement not covered" > options = options || {};</span>
} else <span class="cstat-no" title="statement not covered" >if (options) {</span>
<span class="cstat-no" title="statement not covered" > options = { format: options };</span>
} else {
<span class="cstat-no" title="statement not covered" > options = {};</span>
}
&nbsp;
const thisLogger = <span class="cstat-no" title="statement not covered" >logger4js;</span>
let level = <span class="cstat-no" title="statement not covered" >levels.toLevel(options.level, levels.INFO);</span>
const fmt = <span class="cstat-no" title="statement not covered" >options.format || DEFAULT_FORMAT;</span>
const nolog = <span class="cstat-no" title="statement not covered" >options.nolog ? createNoLogCondition(options.nolog) : null;</span>
&nbsp;
<span class="cstat-no" title="statement not covered" > return <span class="fstat-no" title="function not covered" >(r</span>eq, res, next) =&gt; {</span>
// mount safety
<span class="cstat-no" title="statement not covered" > if (req._logging) <span class="cstat-no" title="statement not covered" >return next();</span></span>
&nbsp;
// nologs
<span class="cstat-no" title="statement not covered" > if (nolog &amp;&amp; nolog.test(req.originalUrl)) <span class="cstat-no" title="statement not covered" >return next();</span></span>
&nbsp;
<span class="cstat-no" title="statement not covered" > if (thisLogger.isLevelEnabled(level) || options.level === 'auto') {</span>
const start = <span class="cstat-no" title="statement not covered" >new Date();</span>
const writeHead = <span class="cstat-no" title="statement not covered" >res.writeHead;</span>
&nbsp;
// flag as logging
<span class="cstat-no" title="statement not covered" > req._logging = true;</span>
&nbsp;
// proxy for statusCode.
<span class="cstat-no" title="statement not covered" > res.writeHead = <span class="fstat-no" title="function not covered" >(c</span>ode, headers) =&gt; {</span>
<span class="cstat-no" title="statement not covered" > res.writeHead = writeHead;</span>
<span class="cstat-no" title="statement not covered" > res.writeHead(code, headers);</span>
&nbsp;
<span class="cstat-no" title="statement not covered" > res.__statusCode = code;</span>
<span class="cstat-no" title="statement not covered" > res.__headers = headers || {};</span>
&nbsp;
// status code response level handling
<span class="cstat-no" title="statement not covered" > if (options.level === 'auto') {</span>
<span class="cstat-no" title="statement not covered" > level = levels.INFO;</span>
<span class="cstat-no" title="statement not covered" > if (code &gt;= 300) <span class="cstat-no" title="statement not covered" >level = levels.WARN;</span></span>
<span class="cstat-no" title="statement not covered" > if (code &gt;= 400) <span class="cstat-no" title="statement not covered" >level = levels.ERROR;</span></span>
} else {
<span class="cstat-no" title="statement not covered" > level = levels.toLevel(options.level, levels.INFO);</span>
}
};
&nbsp;
// hook on end request to emit the log entry of the HTTP request.
<span class="cstat-no" title="statement not covered" > res.on('finish', <span class="fstat-no" title="function not covered" >()</span> =&gt; {</span>
<span class="cstat-no" title="statement not covered" > res.responseTime = new Date() - start;</span>
// status code response level handling
<span class="cstat-no" title="statement not covered" > if (res.statusCode &amp;&amp; options.level === 'auto') {</span>
<span class="cstat-no" title="statement not covered" > level = levels.INFO;</span>
<span class="cstat-no" title="statement not covered" > if (res.statusCode &gt;= 300) <span class="cstat-no" title="statement not covered" >level = levels.WARN;</span></span>
<span class="cstat-no" title="statement not covered" > if (res.statusCode &gt;= 400) <span class="cstat-no" title="statement not covered" >level = levels.ERROR;</span></span>
}
&nbsp;
<span class="cstat-no" title="statement not covered" > if (thisLogger.isLevelEnabled(level)) {</span>
const combinedTokens = <span class="cstat-no" title="statement not covered" >assembleTokens(req, res, options.tokens || []);</span>
&nbsp;
<span class="cstat-no" title="statement not covered" > if (typeof fmt === 'function') {</span>
const line = <span class="cstat-no" title="statement not covered" >fmt(req, res, <span class="fstat-no" title="function not covered" >st</span>r =&gt; <span class="cstat-no" title="statement not covered" >format(str, combinedTokens))</span>;</span>
<span class="cstat-no" title="statement not covered" > if (line) <span class="cstat-no" title="statement not covered" >thisLogger.log(level, line);</span></span>
} else {
<span class="cstat-no" title="statement not covered" > thisLogger.log(level, format(fmt, combinedTokens));</span>
}
}
});
}
&nbsp;
// ensure next gets always called
<span class="cstat-no" title="statement not covered" > return next();</span>
};
}
&nbsp;
/**
* Adds custom {token, replacement} objects to defaults,
* overwriting the defaults if any tokens clash
*
* @param {IncomingMessage} req
* @param {ServerResponse} res
* @param {Array} customTokens
* [{ token: string-or-regexp, replacement: string-or-replace-function }]
* @return {Array}
*/
function <span class="fstat-no" title="function not covered" >assembleTokens(</span>req, res, customTokens) {
const arrayUniqueTokens = <span class="cstat-no" title="statement not covered" ><span class="fstat-no" title="function not covered" >(a</span>rray) =&gt; {</span>
const a = <span class="cstat-no" title="statement not covered" >array.concat();</span>
<span class="cstat-no" title="statement not covered" > for (let i = 0; i &lt; a.length; ++i) {</span>
<span class="cstat-no" title="statement not covered" > for (let j = i + 1; j &lt; a.length; ++j) {</span>
// not === because token can be regexp object
/* eslint eqeqeq:0 */
<span class="cstat-no" title="statement not covered" > if (a[i].token == a[j].token) {</span>
<span class="cstat-no" title="statement not covered" > a.splice(j--, 1);</span>
}
}
}
<span class="cstat-no" title="statement not covered" > return a;</span>
};
&nbsp;
const defaultTokens = <span class="cstat-no" title="statement not covered" >[];</span>
<span class="cstat-no" title="statement not covered" > defaultTokens.push({ token: ':url', replacement: getUrl(req) });</span>
<span class="cstat-no" title="statement not covered" > defaultTokens.push({ token: ':protocol', replacement: req.protocol });</span>
<span class="cstat-no" title="statement not covered" > defaultTokens.push({ token: ':hostname', replacement: req.hostname });</span>
<span class="cstat-no" title="statement not covered" > defaultTokens.push({ token: ':method', replacement: req.method });</span>
<span class="cstat-no" title="statement not covered" > defaultTokens.push({ token: ':status', replacement: res.__statusCode || res.statusCode });</span>
<span class="cstat-no" title="statement not covered" > defaultTokens.push({ token: ':response-time', replacement: res.responseTime });</span>
<span class="cstat-no" title="statement not covered" > defaultTokens.push({ token: ':date', replacement: new Date().toUTCString() });</span>
<span class="cstat-no" title="statement not covered" > defaultTokens.push({</span>
token: ':referrer',
replacement: req.headers.referer || req.headers.referrer || ''
});
<span class="cstat-no" title="statement not covered" > defaultTokens.push({</span>
token: ':http-version',
replacement: `${req.httpVersionMajor}.${req.httpVersionMinor}`
});
<span class="cstat-no" title="statement not covered" > defaultTokens.push({</span>
token: ':remote-addr',
replacement: req.headers['x-forwarded-for'] ||
req.ip ||
req._remoteAddress ||
(req.socket &amp;&amp;
(req.socket.remoteAddress ||
(req.socket.socket &amp;&amp; req.socket.socket.remoteAddress)
)
)
});
<span class="cstat-no" title="statement not covered" > defaultTokens.push({ token: ':user-agent', replacement: req.headers['user-agent'] });</span>
<span class="cstat-no" title="statement not covered" > defaultTokens.push({</span>
token: ':content-length',
replacement: (res._headers &amp;&amp; res._headers['content-length']) ||
(res.__headers &amp;&amp; res.__headers['Content-Length']) ||
'-'
});
<span class="cstat-no" title="statement not covered" > defaultTokens.push({</span>
token: /:req\[([^\]]+)]/g,
replacement: <span class="fstat-no" title="function not covered" >fu</span>nction (_, field) {
<span class="cstat-no" title="statement not covered" > return req.headers[field.toLowerCase()];</span>
}
});
<span class="cstat-no" title="statement not covered" > defaultTokens.push({</span>
token: /:res\[([^\]]+)]/g,
replacement: <span class="fstat-no" title="function not covered" >fu</span>nction (_, field) {
<span class="cstat-no" title="statement not covered" > return res._headers ?</span>
(res._headers[field.toLowerCase()] || res.__headers[field])
: (res.__headers &amp;&amp; res.__headers[field]);
}
});
&nbsp;
<span class="cstat-no" title="statement not covered" > return arrayUniqueTokens(customTokens.concat(defaultTokens));</span>
}
&nbsp;
/**
* Return request url path,
* adding this function prevents the Cyclomatic Complexity,
* for the assemble_tokens function at low, to pass the tests.
*
* @param {IncomingMessage} req
* @return {String}
* @api private
*/
&nbsp;
function <span class="fstat-no" title="function not covered" >getUrl(</span>req) {
<span class="cstat-no" title="statement not covered" > return req.originalUrl || req.url;</span>
}
&nbsp;
/**
* Return formatted log line.
*
* @param {String} str
* @param {Array} tokens
* @return {String}
* @api private
*/
function <span class="fstat-no" title="function not covered" >format(</span>str, tokens) {
<span class="cstat-no" title="statement not covered" > for (let i = 0; i &lt; tokens.length; i++) {</span>
<span class="cstat-no" title="statement not covered" > str = str.replace(tokens[i].token, tokens[i].replacement);</span>
}
<span class="cstat-no" title="statement not covered" > return str;</span>
}
&nbsp;
/**
* Return RegExp Object about nolog
*
* @param {String|Array} nolog
* @return {RegExp}
* @api private
*
* syntax
* 1. String
* 1.1 "\\.gif"
* NOT LOGGING http://example.com/hoge.gif and http://example.com/hoge.gif?fuga
* LOGGING http://example.com/hoge.agif
* 1.2 in "\\.gif|\\.jpg$"
* NOT LOGGING http://example.com/hoge.gif and
* http://example.com/hoge.gif?fuga and http://example.com/hoge.jpg?fuga
* LOGGING http://example.com/hoge.agif,
* http://example.com/hoge.ajpg and http://example.com/hoge.jpg?hoge
* 1.3 in "\\.(gif|jpe?g|png)$"
* NOT LOGGING http://example.com/hoge.gif and http://example.com/hoge.jpeg
* LOGGING http://example.com/hoge.gif?uid=2 and http://example.com/hoge.jpg?pid=3
* 2. RegExp
* 2.1 in /\.(gif|jpe?g|png)$/
* SAME AS 1.3
* 3. Array
* 3.1 ["\\.jpg$", "\\.png", "\\.gif"]
* SAME AS "\\.jpg|\\.png|\\.gif"
*/
function <span class="fstat-no" title="function not covered" >createNoLogCondition(</span>nolog) {
let regexp = <span class="cstat-no" title="statement not covered" >null;</span>
&nbsp;
<span class="cstat-no" title="statement not covered" > if (nolog) {</span>
<span class="cstat-no" title="statement not covered" > if (nolog instanceof RegExp) {</span>
<span class="cstat-no" title="statement not covered" > regexp = nolog;</span>
}
&nbsp;
<span class="cstat-no" title="statement not covered" > if (typeof nolog === 'string') {</span>
<span class="cstat-no" title="statement not covered" > regexp = new RegExp(nolog);</span>
}
&nbsp;
<span class="cstat-no" title="statement not covered" > if (Array.isArray(nolog)) {</span>
// convert to strings
const regexpsAsStrings = <span class="cstat-no" title="statement not covered" >nolog.map(<span class="fstat-no" title="function not covered" >re</span>g =&gt; (<span class="cstat-no" title="statement not covered" >reg.source ? reg.source : reg)</span>);</span>
<span class="cstat-no" title="statement not covered" > regexp = new RegExp(regexpsAsStrings.join('|'));</span>
}
}
&nbsp;
<span class="cstat-no" title="statement not covered" > return regexp;</span>
}
&nbsp;
module.exports.connectLogger = getLogger;
&nbsp;</pre></td></tr>
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