How to support logging (console.log) statement in microcule example java script index.js file?

[rishabh1952]

I am not able to find the log statement added with console.log() in microcule js example index,js. also,In microcule any Js example index.js file am adding console.log() ,but that log statement is not displaying in my command prompt.If i use res.write('') that logs displaying in browser,any possibilities to support logging statement using console.log that will display in console not browser?

[Marak]

What operating system on you on? Is it Windows? Also, what is your node -v and npm -v and microcule -v values returning on console?

The default behavior for console.log in microcule services should be to write directly to your console. This is the default logger that should being run: https://github.com/Stackvana/microcule/blob/master/lib/plugins/logger.js

It's also possible to easily override this logging behavior with your own custom logging middleware.

How are you starting the microcule server?

[rishabh1952]

Hi, Yes i am using windows 10 OS with npm-5.6.0, microcule-6.0.0,node-v8.11.1. I tried both way to start microcule first npm start and second direct index file run like microcule ./index.js
Default logging(https://github.com/Stackvana/microcule/blob/master/lib/plugins/logger.js) is displaying my console ,
For custom looging in index.js am using console.log() that is not working is it possible to support
logging in console for index.js using console.log()?
I also tried for custom logging using witson library that also not printing logs in console.its printing in output please check below refrence and attached screenshots
Example:

module['exports'] = function calculateSal(req, res) {
  var flow = require('../setup.js');
  var logger = require('../logger.js'); //custom logger class using witson
  //console.log("input salary is:", req.params.salary); //Not working
  //console.log("input pf is:", req.params.pf); //Not working
  logger.info('input salary is:%s', req.params.salary);
  logger.info('input pf is:%s', req.params.pf);
  flow.totalSal(req.params.salary, req.params.pf).then(totalsal => {
    res.json({
      message: "Salray calculated successfully",
      salary: req.params.salary,
      PF: req.params.pf,
      totalSal: totalsal
    });
  }).catch(err => {
    res.json({
      errorMessage: "salary is not proper."
    });
  });
};

Here just one sample am trying calculate total salary with post json request using postman

**Request:** POST- content-type:(application/json)
 {
    "salary": 25000,
    "pf":1800
}

In this total sal function it just adding both salary+pf and return response.

**Response in postman in Text format**
---------------------------------------
2018-07-06T06:12:10.191Z  info: input salary is:25000
2018-07-06T06:12:10.199Z  info: input pf is:1800
{
  "message": "Salray calculated successfully",
  "salary": "25000",
  "PF": "1800",
  "totalSal": "26800"
}
**Note:**
2018-07-06T06:12:10.191Z  info: input salary is:25000
2018-07-06T06:12:10.199Z  info: input pf is:1800

1.These first two logger i want to print in console.we can print this in console?
2.Second thing am returning response as json(res.json()) why its not return me as json format.its giving me as text format..It is possible to get stdout response as json?
Postman Screenshots attached Please clarify me.

[Marak]

To answer your questions:

1. Yes, console.log is suppose to work as normal and I have confirmed it's working here on v6.1.0. I haven't had time to test Windows.

2. Yes, microcule returns JSON. You have to use API methods as suggested in examples.

It looks like winston or maybe just console.log in general isn't working as intended in your environment. I suspect it's windows related. The output from the console statements are suppose to be redirected over STDIO and then to console by default. It looks like it's being redirected to client output instead.

Maybe try running the bare-bone examples instead of using microcule command, it could help.

see:

https://github.com/Stackvana/microcule/blob/master/examples/http-server-simple.js
https://github.com/Stackvana/microcule/blob/master/examples/express-simple.js

Would also be good if you could to test on non-windows machine.

[rishabh1952]

Hi thanks for update I tried with non windows machine(linux OS ubuntu 16.04) there its solved the issues but console.log coming in second request.First am giving request that time default logging only displaying in my console and am getting res, then if i hit second time same request then default and custom logging displaying in my console.Is it a bug ? I am using node-v8.11.3 ,npm :5.0.0, microcule-6.0.0 version.Please check in your side and please let me now why first time custom log(console.log) is not displaying.If in your side log displaying in first time please update your npm,and node version so i can update same in my machine.

module.exports = function (req,res) {
res.write('Hello,This is javascript function\n');
console.log("Hello,This is javascript function");// working in second request in ubuntu
res.json(req.params); //getting response as Text format in postman
res.end('');
};

1)First time request custom log not displaying in console,second time same request working for this class in non-windows machine.
2) From this Js file if i call another js class function and there am adding console.log that also not displaying in console in ubuntu linux environment ,that log displaying in my output not console,why like this?
3)Here i am returning response as u suggested example res.json(req.params); Am getting this response as text format in postman you told microcule returns as json but in windows and non-windows machine same beheviour am getting, am not using express module.can i get this response as JSON format ?
Please check this screenshots

[rishabh1952]

Hi Above comment third point am able to resolve.I set output content type in microcule\lib\plugins\spawn\index.js file. so am getting response as json format.If possible clarify me first and second point.Thanks.

[Marak]

@rishabh1952 -

It would be best if you could use the latest version of microcule which is on Github, v6.1.0

Calling res.json should end the request so you shouldn't be calling res.end afterwards. You can set headers inside the service like:

  res.writeHead(200, { 'Content-Type': 'application/json' });  

res.json should automatically be setting the json content-type though. It would be good to add this into microcule test suite.

I'm not seeing any of the logging behavior acting strange here or in production. console.log is being overloaded in the context of the node function, so you might have run into issues with require scope somewhere. It should be working. It might be better for you to use separate logging function or to trace code paths for logging to see where it's being redirected wrong.

We have a good code coverage for hook.io which consumes microcule and serves it in production, but I'm looking at the nyc code coverage report for microcule itself and it's below 50%. It would be great if we could start adding more tests for these issues.