How to use Morgan logger?

Question

I cannot log with Morgan. It doesn\'t log info to console. The documentation doesn\'t tell how to use it.

I want to see what a variable is. This is a code from

Answer 1

I faced the same problem ago and instead, I used winston. As fellas above said, morgan is for automated logging of request/response. Winston can be configured pretty much same way as log4Net/log4J, has severity levels, different streams to which you can log etc.

For example:

npm install winston

Then, if you call the below code somewhere on you application initialization:

var winston = require('winston');

// setup default logger (no category)
winston.loggers.add('default', {
    console: {
        colorize: 'true',
        handleExceptions: true,
        json: false,
        level: 'silly',
        label: 'default',
    },
    file: {
        filename: 'some/path/where/the/log/file/reside/default.log',
        level: 'silly',
        json: false,
        handleExceptions: true,
    },
});

//
// setup logger for category `usersessions`
// you can define as many looggers as you like
//
winston.loggers.add('usersessions', {
    console: {
        level: 'silly',
        colorize: 'true',
        label: 'usersessions',
        json: false,
        handleExceptions: true,
    },
    file: {
        filename: 'some/path/where/the/log/file/reside/usersessions.log',
        level: 'silly',
        json: false,
        handleExceptions: true,
    },
});

note: before calling above code, winston.loggers is empty, i.e you dont have any loggers configured yet. Pretty much like Log4Net/J XmlConfigure methods - you need to first call them, to init your logging.

Then, later wherever in you application server side code you may do:

var winston = require('winston');
// log instances as defined in first snippet
var defaultLog = winston.loggers.get('default'); 
var userSessionsLog = winston.loggers.get('usersessions');

defaultLog.info('this goes to file default.log');
userSessionsLog.debug('this goes to file usersessions.log')

Hope that helps.

for further documentation reference: https://www.npmjs.com/package/winston

Answer 2

Just do this:

app.use(morgan('tiny'));

and it will work.

Answer 3

Morgan :- Morgan is a middleware which will help us to identify the clients who are accessing our application. Basically a logger.

To Use Morgan, We need to follow below steps :-

1. Install the morgan using below command:

npm install --save morgan

This will add morgan to json.package file

2. Include the morgan in your project

var morgan = require('morgan');

3> // create a write stream (in append mode)

var accessLogStream = fs.createWriteStream(
      path.join(__dirname, 'access.log'), {flags: 'a'}
 );
// setup the logger 
app.use(morgan('combined', {stream: accessLogStream}));

Note: Make sure you do not plumb above blindly make sure you have every conditions where you need .

Above will automatically create a access.log file to your root once user will access your app.

Answer 4

You might want to try using mongo-morgan-ext

The usage is:

var logger = require('mongo-morgan-ext');

var db = 'mongodb://localhost:27017/MyDB';

var collection = 'Logs'

var skipfunction = function(req, res) {

return res.statusCode > 399;
} //Thiw would skip if HTTP request response is less than 399 i.e no errors.

app.use(logger(db,collection,skipfunction)); //In your express-application

The expected output is

{
    "RequestID": "",
    "status": "",
    "method": "",
    "Remote-user": "",
    "Remote-address": "",
    "URL": "",
    "HTTPversion": "",
    "Response-time": "",
    "date":"",
    "Referrer": "",
    "REQUEST": { //10
        "Accept": "",
        "Accept-Charset": "",
        "Accept-Encoding": "",
        "Accept-Language": "",
        "Authorization": "",
        "Cache-Control": "",
        "Connection": "",
        "Cookie": "",
        "Content-Length": "",
        "Content-MD5": "",
        "Content-Type": "",
        "Expect": "",
        "Forwarded": "",
        "From": "",
        "Host": "",
        "Max-Forwards": "",
        "Origin": "",
        "Pragma": "",
        "Proxy-Authorization": "",
        "Range": "",
        "TE": "",
        "User-Agent": "",
        "Via": "",
        "Warning": "",
        "Upgrade": "",
        "Referer": "",
        "Date": "",
        "X-requested-with": "",
        "X-Csrf-Token": "",
        "X-UIDH": "",
        "Proxy-Connection": "",
        "X-Wap-Profile": "",
        "X-ATT-DeviceId": "",
        "X-Http-Method-Override":"",
        "Front-End-Https": "",
        "X-Forwarded-Proto": "",
        "X-Forwarded-Host": "",
        "X-Forwarded-For": "",
        "DNT": "",
        "Accept-Datetime": "",
        "If-Match": "",
        "If-Modified-Since": "",
        "If-None-Match": "",
        "If-Range": "",
        "If-Unmodified-Since": ""
    },
    "RESPONSE": {
        "Status": "",
        "Content-MD5":"",
        "X-Frame-Options": "",
        "Accept-Ranges": "",
        "Age": "",
        "Allow": "",
        "Cache-Control": "",
        "Connection": "",
        "Content-Disposition": "",
        "Content-Encoding": "",
        "Content-Language": "",
        "Content-Length": "",
        "Content-Location": "",
        "Content-Range": "",
        "Content-Type":"",
        "Date":"",
        "Last-Modified": "",
        "Link": "",
        "Location": "",
        "P3P": "",
        "Pragma": "",
        "Proxy-Authenticate": "",
        "Public-Key-Pins": "",
        "Retry-After": "",
        "Server": "",
        "Trailer": "",
        "Transfer-Encoding": "",
        "TSV": "",
        "Upgrade": "",
        "Vary": "",
        "Via": "",
        "Warning": "",
        "WWW-Authenticate": "",
        "Expires": "",
        "Set-Cookie": "",
        "Strict-Transport-Security": "",
        "Refresh":"",
        "Access-Control-Allow-Origin": "",
        "X-XSS-Protection": "",
        "X-WebKit-CSP":"",
        "X-Content-Security-Policy": "",
        "Content-Security-Policy": "",
        "X-Content-Type-Options": "",
        "X-Powered-By": "",
        "X-UA-Compatible": "",
        "X-Content-Duration": "",
        "Upgrade-Insecure-Requests": "",
        "X-Request-ID": "",
        "ETag": "",
        "Accept-Patch": ""
    }

}