expres js db logging on top of connect-logger

logger.js

// use it as a middleware like this
app.use(logger.db('appName')) // by default logs to a db and console.log
app.use(logger.db('appName', false)) // don't log to console.log

// logger.js
var express = require('express') 
var logger = express.logger
var RequestLog = require('reports/model/RequestLog')
express.logger.token('route', function(req, res) {
	var route = req.route || {}
	return route.path || "static" // we don't get a route for static files
})

exports.db = function(appName, out) {

	appName = appName || "api"
	if (typeof out === "undefined") out = process.stdout
	var format = ":method||:url|:route|:response-time||appName"
	var fmt = compile(logger.default) // default logger format
	
	return function(req, res, next) {
		logger({
			buffer: true
			, format: format
			, stream: { write: dbLogger}
		})(req, res, next)
		if (!out) return
		var line = fmt(logger, req, res)
		if (null == line) return;
		out.write(line + '\n', 'ascii');
	}

	function dbLogger(string, encoding) {
		var reqs = string.split("\n")
		var len = reqs.length - 1
		var arr = []
		for (var i = 0; i < len; i++) {
			arr = reqs[i].replace("appName", appName).split("|")
			if (arr[3] === "static") return // we only care about things with routes
			RequestLog.saveLog.apply(RequestLog, arr)
		}
	}
}

function compile(fmt) {
  fmt = fmt.replace(/"/g, '\\"');
  var js = '  return "' + fmt.replace(/:([-\w]{2,})(?:\[([^\]]+)\])?/g, function(_, name, arg){
    return '"\n    + (tokens["' + name + '"](req, res, "' + arg + '") || "-") + "';
  }) + '";'
  return new Function('tokens, req, res', js);
};