I have this function that I was trying to debug because i was getting an error. I have since fixed the issue because I found someone with a similar problem, but being able to console log one of the parameters in the JwtStrategy would have really helped and given me a better understanding what was being passed through. I still can't seem to console it even though others have been able to using Postman and their source code.

So I have mongod and nodemon running in the back. and I this is the function.

module.exports = function(passport){

    let opts = {}; //options is an object literal containing options to control how token is extracted.
    opts.jwtFromRequest = ExtractJwt.fromAuthHeaderWithScheme("jwt")  
    opts.secretOrKey = config.secret; //string containing the secret or pem encoded public key verifying the tokens signiture
    passport.use(new JwtStrategy(opts, (jwt_payload,done)=>{
        console.log(jwt_payload);  
        User.getUserById(jwt_payload._doc._id, (err, user)=>{  
            if(err){
                return done(err,false);
            }
            if(user){
                return done(null, user);
            }else{
                return done(null,done);
            }
        });
    }));
}

As you see, I have a console.log(jwt_payload); This is what I put into Postman Post method, http://localhost:3000/users/authenticate, body:

{
    "username":"bobdylan",
    "password":"123456"
}

As I said above it is working and returning the correct JSON that I want. The only problem is that this jwt_payload isn't console logging in the terminal so I can see it passing through. I have this in the terminal.

Server started on port 3000
yay i am connected to databasemongodb://localhost:27017/authapp

So the "yay I am connected" is a console.log in the app.js. Why is this printing but not my console.log above? I would like to have this ability for future debugging issues.

This is additional code showing that it is actually working but the console log isnt working

{
    "sucess": true,
    "token": "JWTeyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJfaWQiOiI1YTk2M2VmMGM3MjM4NjA0MGUwYTgwZjEiLCJuYW1lIjoiYm9iIiwiZW1haWwiOiJib2JAZHlsYW4uY29tIiwidXNlcm5hbWUiOiJib2JkeWxhbiIsInBhc3N3b3JkIjoiJDJhJDEwJHprbFBVWjI5dlJMLjRJWnlOZ1N6amVaMk1mVGVzcWdRSHIuTEkzVjhmZTIwT1NxT2p0STdLIiwiX192IjowLCJpYXQiOjE1MTk3OTk0NTcsImV4cCI6MTUyMDM5OTQ1N30.DlwzJuQayQ1zc4p8Gy5PGaE22N8ekyrBrmOhVPMkJ6Y",
    "user": {
        "id": "5a963ef0c72386040e0a80f1",
        "name": "bob",
        "username": "bobdylan",
        "email": "[email protected]"
    }
}

So that is the response after the request.

I have this function that I was trying to debug because i was getting an error. I have since fixed the issue because I found someone with a similar problem, but being able to console log one of the parameters in the JwtStrategy would have really helped and given me a better understanding what was being passed through. I still can't seem to console it even though others have been able to using Postman and their source code.

So I have mongod and nodemon running in the back. and I this is the function.

module.exports = function(passport){

    let opts = {}; //options is an object literal containing options to control how token is extracted.
    opts.jwtFromRequest = ExtractJwt.fromAuthHeaderWithScheme("jwt")  
    opts.secretOrKey = config.secret; //string containing the secret or pem encoded public key verifying the tokens signiture
    passport.use(new JwtStrategy(opts, (jwt_payload,done)=>{
        console.log(jwt_payload);  
        User.getUserById(jwt_payload._doc._id, (err, user)=>{  
            if(err){
                return done(err,false);
            }
            if(user){
                return done(null, user);
            }else{
                return done(null,done);
            }
        });
    }));
}

As you see, I have a console.log(jwt_payload); This is what I put into Postman Post method, http://localhost:3000/users/authenticate, body:

{
    "username":"bobdylan",
    "password":"123456"
}

As I said above it is working and returning the correct JSON that I want. The only problem is that this jwt_payload isn't console logging in the terminal so I can see it passing through. I have this in the terminal.

Server started on port 3000
yay i am connected to databasemongodb://localhost:27017/authapp

So the "yay I am connected" is a console.log in the app.js. Why is this printing but not my console.log above? I would like to have this ability for future debugging issues.

This is additional code showing that it is actually working but the console log isnt working

{
    "sucess": true,
    "token": "JWTeyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJfaWQiOiI1YTk2M2VmMGM3MjM4NjA0MGUwYTgwZjEiLCJuYW1lIjoiYm9iIiwiZW1haWwiOiJib2JAZHlsYW4uY29tIiwidXNlcm5hbWUiOiJib2JkeWxhbiIsInBhc3N3b3JkIjoiJDJhJDEwJHprbFBVWjI5dlJMLjRJWnlOZ1N6amVaMk1mVGVzcWdRSHIuTEkzVjhmZTIwT1NxT2p0STdLIiwiX192IjowLCJpYXQiOjE1MTk3OTk0NTcsImV4cCI6MTUyMDM5OTQ1N30.DlwzJuQayQ1zc4p8Gy5PGaE22N8ekyrBrmOhVPMkJ6Y",
    "user": {
        "id": "5a963ef0c72386040e0a80f1",
        "name": "bob",
        "username": "bobdylan",
        "email": "[email protected]"
    }
}

So that is the response after the request.

• javascript
• jwt
• console.log

• So what happens if you console.log('this is a test') at the same location? – Randy Casburn Commented Feb 28, 2018 at 6:21
• I tried a string as well and it doesn't show up. – Jonathan Schroeder Commented Feb 28, 2018 at 6:30
• And User.getUserById(...) works correctly? If so, that is very perplexing. – Randy Casburn Commented Feb 28, 2018 at 6:41
• Ya, it all worked and response was 200 and the body was success true with the token and user object being sent. I don't get it. – Jonathan Schroeder Commented Feb 28, 2018 at 13:24
• I can add more code above showing that the req res truly is working, but the consolelog not working – Jonathan Schroeder Commented Feb 28, 2018 at 13:30

3 Answers 3

For anyone who is struggling with output of console.log, console.info, etc in Postman

You can view postman console on menu View >> Show Postman Console

not on menu View >> Developer >> Show DevTools

changed user.toJSON() to {data:user}. Finally it started printing to the console and found out the payload was coming in through an object called data. Because of this I put jwt_payload.data._id instead of what I had above. I think the npm documentation has changed with updates. I have another Mean app using passport and I used jwt_payload._doc._id which worked before. Also I don't think I had to put {data:user}. I think before I just had user there. Im surprised the registration and authentication worked with user.toJSON() but didn't work with going to the profile page. I really was about to give up but thankfully I tried again and again.

Change opts.jwtFromRequest = ExtractJwt.fromAuthHeaderWithScheme("jwt") to opts.jwtFromRequest = ExtractJwt.fromAuthHeaderWithScheme('JWT')

JWT in capitals