Loggly + Express.js/Connect middleware see full article: [http://wp.me/pfl8Y-7X]

JavaScriptTranslation.js

var OBJECT, env, logglyConfig, logglyKey, logglyMiddleware, services;

logglyKey = "[SUPPRESS]";

env = process.env.API_ENV;

logglyConfig = {
  subdomain: "fabian......",
  json: true
};

services = {};

services.loggly = require('loggly').createClient(logglyConfig);

OBJECT = 'object';

logglyMiddleware = function(req, res, next) {
  var end, resData, send;

  if (!req._startTime) {
    req._startTime = new Date();
  }
  send = res.send;
  resData = null;
  res.send = function(_status, _body) {
    var body, k, v, _i, _len;

    res.send = send;
    if (typeof _status === OBJECT) {
      body = _status;
    } else {
      body = _body;
    }
    if (body) {
      if (body instanceof Array) {
        resData = [];
        for (_i = 0, _len = body.length; _i < _len; _i++) {
          v = body[_i];
          if (v === null || typeof v !== OBJECT) {
            resData.push(v);
          } else {
            resData.push(v.toString && v.toString());
          }
        }
      } else {
        resData = {};
        for (k in body) {
          v = body[k];
          if (v === null || typeof v !== OBJECT) {
            resData[k] = v;
          } else {
            resData[k] = v.toString && v.toString();
          }
        }
      }
    }
    if (_body) {
      return res.send(_status, _body);
    } else {
      return res.send(_status);
    }
  };
  end = res.end;
  res.end = function(c, e) {
    var ip, len, obj;

    res.end = end;
    res.end(c, e);
    ip;
    if (req.ip) {
      ip = req.ip;
    } else if (req.socket && req.socket.socket) {
      ip = req.socket.socket.remoteAddress;
    }
    len = parseInt(res.getHeader('Content-Length') || '0', 10) / 1024;
    obj = {
      type: 'request',
      at: req._startTime,
      duration: (new Date()) - req._startTime,
      status: res.statusCode,
      ip: ip,
      path: req.path || req.originalUrl || req.url,
      env: env,
      method: req.method,
      respData: resData,
      respKb: Math.round(len * 10) / 10
    };
    if (req.headers) {
      obj.headers = req.headers;
    }
    if (req.body) {
      obj.body = req.body;
    }
    if (req.query) {
      obj.qs = req.query;
    }
    if (req.params) {
      obj.params = req.params;
    }
    if (req.files) {
      obj.files = Object.keys(req.files);
    }
    if (env === 'development') {
      return console.log(obj);
    } else {
      return services.loggly.log(logglyKey, obj);
    }
  };
  return next();
};

logglyMiddleware.coffee

logglyKey = "[SUPPRESS]"

env = process.env.API_ENV # or whatever makes more sense to you

logglyConfig =
  subdomain: "fabian......" # configure it right ;)
  json: true

services = {}
services.loggly = require('loggly').createClient(logglyConfig);

OBJECT = 'object'
logglyMiddleware = (req,res,next) ->
  unless req._startTime
    req._startTime = new Date()

  # asking for trouble!
  send = res.send
  resData = null
  res.send = (_status,_body) ->
    res.send = send
    if typeof _status == OBJECT
      body = _status
    else
      body = _body
    if body
      if body instanceof Array
        resData = []
        for v in body
          if v == null || typeof v != OBJECT
            resData.push v
          else
            resData.push v.toString && v.toString()
      else
        resData = {}
        # check 1 level
        for k,v of body
          if v == null || typeof v != OBJECT
            resData[k] = v
          else
            resData[k] = v.toString && v.toString()
    if _body
      res.send(_status,_body)
    else
      res.send(_status)
  # /asking for trouble!

  end = res.end
  res.end = (c,e) ->
    #console.log res
    res.end = end
    res.end c, e

    ip
    if (req.ip)
      ip = req.ip
    else if req.socket && req.socket.socket 
      ip = req.socket.socket.remoteAddress

    len = parseInt(res.getHeader('Content-Length') || '0', 10)/1024

    obj = 
      type: 'request'
      at: req._startTime
      duration: (new Date()) - req._startTime
      status: res.statusCode
      ip: ip
      path: req.path || req.originalUrl || req.url
      env: env
      method: req.method
      respData: resData
      respKb: Math.round(len*10)/10

    if req.headers
      obj.headers = req.headers

    if req.body
      obj.body = req.body

    if req.query
      obj.qs = req.query

    if req.params
      obj.params = req.params

    if req.files
      obj.files = Object.keys req.files

    if env == 'development'
      console.log obj
    else
      services.loggly.log(logglyKey, obj)

  next()