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Added automatic level detection to connect-logger, depends on http status response.

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Update of connect logger example code, compatible with express 3.x
This commit is contained in:
Jure Mav 2013-05-11 16:17:23 +02:00
parent ad8229145e
commit ac6284add1
2 changed files with 133 additions and 91 deletions
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48
examples/example-connect-logger.js
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@ -1,14 +1,46 @@
var log4js = require('./lib/log4js');
log4js.addAppender(log4js.fileAppender('cheese.log'), 'cheese');
//The connect/express logger was added to log4js by danbell. This allows connect/express servers to log using log4js.
//https://github.com/nomiddlename/log4js-node/wiki/Connect-Logger
var logger = log4js.getLogger('cheese');
logger.setLevel('INFO');
// load modules
var log4js = require('log4js');
var express = require("express");
var app = express();
var app = require('express').createServer();
//config
log4js.configure({
appenders: [
{ type: 'console' },
{ type: 'file', filename: 'logs/log4jsconnect.log', category: 'log4jslog' }
]
});
//define logger
var logger = log4js.getLogger('log4jslog');
// set at which time msg is logged print like: only on error & above
// logger.setLevel('ERROR');
//express app
app.configure(function() {
app.use(log4js.connectLogger(logger, { level: log4js.levels.INFO }));
app.use(express.favicon(''));
// app.use(log4js.connectLogger(logger, { level: log4js.levels.INFO }));
// app.use(log4js.connectLogger(logger, { level: 'auto', format: ':method :url :status' }));
//### AUTO LEVEL DETECTION
//http responses 3xx, level = WARN
//http responses 4xx & 5xx, level = ERROR
//else.level = INFO
app.use(log4js.connectLogger(logger, { level: 'auto' }));
});
app.get('*', function(req,res) {
res.send('hello world\n <a href="/cheese">cheese</a>\n');
//route
app.get('/', function(req,res) {
res.send('hello world');
});
//start app
app.listen(5000);
console.log('server runing at localhost:5000');
console.log('Simulation of normal response: goto localhost:5000');
console.log('Simulation of error response: goto localhost:5000/xxx');

18
lib/connect-logger.js
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@ -5,7 +5,7 @@ var levels = require("./levels");
* Options:
*
* - `format` Format string, see below for tokens
* - `level` A log4js levels instance.
* - `level` A log4js levels instance. Supports also 'auto'
*
* Tokens:
*
@ -47,8 +47,7 @@ function getLogger(logger4js, options) {
// nologs
if (nolog && nolog.test(req.originalUrl)) return next();
if (thislogger.isLevelEnabled(level)) {
if (thislogger.isLevelEnabled(level) || options.level === 'auto') {
var start = +new Date
, statusCode
@ -65,6 +64,15 @@ function getLogger(logger4js, options) {
res.writeHead(code, headers);
res.__statusCode = statusCode = code;
res.__headers = headers || {};
//status code response level handling
if(options.level === 'auto'){
level = levels.INFO;
if(code >= 300) level = levels.WARN;
if(code >= 400) level = levels.ERROR;
} else {
level = levels.toLevel(options.level, levels.INFO)
}
};
// proxy end to output a line to the provided logger.
@ -72,12 +80,14 @@ function getLogger(logger4js, options) {
res.end = end;
res.end(chunk, encoding);
res.responseTime = +new Date - start;
if ('function' == typeof fmt) {
if (thislogger.isLevelEnabled(level)) {
if (typeof fmt === 'function') {
var line = fmt(req, res, function(str){ return format(str, req, res); });
if (line) thislogger.log(level, line);
} else {
thislogger.log(level, format(fmt, req, res));
}
}
};
}