This is my code for a login route, I am trying to call docs._id but it gives me back null. When I call just docs it shows this on server side:
[ { _id: EX unique id,
username: { user: 'EXUsername', search: 'exusername' },
pass: 'EXpassword',
email: 'EXemail' } ]
I am really confused on why I can't call docs.pass or docs._id at all but docs itself has stuff in it and I can call docs and it gives data back.
my code in node.js:
router.post('/loginUser', function(req, res){
CheckingLogin(req.db, req.body.username, req.body.password, function(bool, docs){
if(bool && exists(docs)){
var err = false;
var handleError = function(e){
if(err){
err = true;
var eDoc = {};
eDoc.errorCode = 1;
eDoc.error = e;
console.log(eDoc);
}
}
/////problem here//////////////////////////////////
var userID = docs._id;
console.log(docs._id);
if(userID != null){
if(!err){
tokens.db = req.db;
tokens.refresher.create(userID, function(token){
console.log('in token refresher ' + docs);
res.send('1');
});
}else{
console.log('Token err = true');
}
}else{
console.log('Creator token = null');
res.send('0');
}
}else{
res.send('0');
}
});
});
Hey its an array of object so just get it like this docs[0]._id it will work for you.
Related
I've tried to insert the data from webform to neo4j database but my record has been inserted but at the same time i got this error socket hang up.
And Match query doesn't work help out for this problem
app.post('/insert',function (req,res){
var email = req.body['email'];
var password = req.body['password'];
var query = [
'CREATE (user:test {newUser})'
// 'RETURN user'
]
var params = {
newUser: {
email: email,
password: password,
}
};
db.cypher({
query: query,
params: params
},
function(err,user){
if(err) console.log(err) ;
console.log(user);
res.send("Record has been Inserted ");
});
})
app.get('/json', function(req,res){
db.cypher({
query: 'MATCH (user:test {email: {email}}) RETURN user'
}, function (err, results) {
if (err) console.log(err);
var result = results[2];
if (!result) {
console.log('No user found.');
} else {
var user = result['user'];
console.log(JSON.stringify(user, null, 4));
}
});
})
I'm still very new to Node.js, and i'm trying to understand how callbacks work.
So, here is my problem :
I should've put more code :
POST :
app.post('/register', function(req, res) {
//get data from the request
var data = {
username: req.body.username,
email: req.body.email,
password: req.body.password
};
function fetchID(callback) {
connection.query('SELECT id_user FROM USERS WHERE username = ?', data.username, function(err, rows) {
if (err) {
callback(err, null);
} else
callback(null, rows[0].id_user);
});
}
var user_id;
fetchID(function(err, content) {
if (err) {
console.log(err);
return next("Mysql error, check your query");
} else {
user_id = content;
console.log(user_id); //undefined
}
});
console.log(user_id); //undefined
var payload = {
iss: req.hostname,
sub: user_id
}
console.log(payload.sub); //correct id
})
GET :
app.get('/todos', function(req, res) {
if (!req.headers.authorization) {
return res.status(401).send({
message: 'You are not authorized !'
});
}
var token = req.headers.authorization.split(' ')[1];
var payload = jwt.decode(token, "shhh..");
//additional level of security
console.log('sub id is : ' + payload.sub); //undefined
if (!payload.sub) {
return res.status(401).send({
message: 'Authentication failed !'
});
}
})
I commented each console.log to be more clear. I need to get the correct id when i check for if (!payload.sub) in app.get()
Your two functions should be something like -
function fetchID(data, callback) {
connection.query('SELECT id_user FROM USERS WHERE username = ?', data.username, function(err, rows) {
if (err) {
callback(err, null);
} else
callback(null, rows[0].id_user);
});
}
and then
var user_id;
fetchID(data, function(err, content) {
if (err) {
console.log(err);
// Do something with your error...
} else {
user_id = content;
}
});
Here in the callback function, the returned variable content will hold the value for user_id.
EDIT
I have not solved the exact problem as you had described above.
But in following example, I have shown that, the callback mechanism is working -
First (Table creation and insert some dummy data)-
use test;
create table users (id int(11) primary key,username varchar(100));
insert into users values(1, "John");
insert into users values(2, "Sham");
Now I have made your post method as get and tested in browser.
Following is the full class tested in my localhost -
var application_root = __dirname,
express = require("express"),
mysql = require('mysql');
var app = express();
var connection = mysql.createConnection({
host : 'localhost',
user : 'root',
password : 'admin',
database: "test"
});
app.get('/getuser', function(req, res) {
//get data from the request
var data = {
username: req.query.username
};
function fetchID(data, callback) {
connection.query('SELECT id FROM users WHERE username = ?',
data.username, function(err, rows) {
if (err) {
callback(err, null);
} else
callback(null, rows[0].id);
});
}
var user_id;
fetchID(data, function(err, content) {
if (err) {
console.log(err);
res.send(err);
// Do something with your error...
} else {
user_id = content;
console.log(user_id);
res.send("user id is -" + user_id);
}
});
})
app.listen(1212);
Now these requests will produce this output -
http://127.0.0.1:1212/getuser?username=john => user id is -1 and
http://127.0.0.1:1212/getuser?username=sham => user id is -2
Hope this code example will help you to understand the callback in node.js.
Thanks
I am trying to implement a authentication system for my website using MEAN however I have run into a relatively strange problem. I am able to register users and duplicate usernames can be identified. However, I cannot get logging into the website working. When I search the mongo database using the command line, I do not get anything. This is what my mongo output looks like.
>> show users
>>
The database has the username somewhere... so how do I get the users to be properly displayed? Why is that user is undefined when I try to log in even though I know the username is in the database?
var crypto = require('crypto');
var mongoose = require('mongoose');
var User = mongoose.model('User');
function hashPW(pwd) {
return crypto.createHash('sha256').update(pwd).digest('base64').toString();
};
module.exports.signup = function (req,res) {
var user = new User({username:req.body.usernmae});
console.log('made it here');
user.set('hashed_password', hashPW(req.body.password));
user.set('email', req.body.email);
user.save(function (err) {
if (err) {
try {
if (err.code==11000) res.render('signup', {message: 'Sorry, someone has that username already.'})
} catch(e) {
}
console.log(err);
//res.redirect('/signup');
} else {
req.session.user = user.id;
req.session.username = user.username;
req.session.msg = 'Authenticated as ' + user.username;
res.redirect('/');
}
});
};
module.exports.login = function (req,res) {
User.findOne({ username: req.body.username })
.exec(function(err,user) {
console.log(user);
console.log(err);
console.log(hashPW(req.body.password.toString()));
if (!user) {
err = 'User Not Found.';
} else if ( user.password === hashPW( req.body.password.toString() ) ) {
req.session.regenerate(function() {
req.session.user = user.id;
req.session.username = user.username;
req.session.msg = 'Authenticated as ' + user.username;
res.redirect('/');
});
} else {
err = 'Authentication failed.';
}
if (err) {
console.log(err);
req.session.regenerate(function() {
req.session.msg = err;
res.redirect('/login');
});
}
});
};
I notice that there's a typo in the provided code.
var user = new User({username:req.body.usernmae});
Should likely read
var user = new User({username:req.body.username});
This probably meant the name failed to set thus putting a junk user into your DB.
Also, regarding your command in the Mongo Shell, Neil's answer covered that the show command is not actually useful here. The reference for db.collection.find() is here.
silly mistake. the field is not password but hashed_password.
{ email: 'somerandomemail#gmail.com',
hashed_password: 'A8ctR3JAA84DWTmYXEAhxEEP1bTtAidaoyWArKHtk2g=',
username: 'Szpok',
_id: 54c09c458c4eccc90b9c4bb5,
__v: 0 }
I am sending a post request from a form but async.waterfall() doesn't execute the mongoose's User.find() function to fetch users from the database and as a result the post request's status in the network inspector is pending as res.send() is not being called.
exports.createUser = function(req,res){
var email1 = req.body.mail.toString();
var password = req.body.password.toString();
async.waterfall([
function(callback) {
// verify user in the db
User.find({email:email1},function(err,data){
if (err){
res.send(404);
return callback(err);
}
// user is found
if (data.length != 0){
res.send(404);
return callback(new Error("User Found"));
}
callback();
});
},
// generate salt password
function(callback) {
bcrypt.genSalt(SALT_WORK_FACTOR,function(err,salt){
if (err) return callback(err);
bcrypt.hash(password,salt,function(err,hash){
if (err) return callback(err);
return callback(null,hash);
});
});
},
//generate random string
function(hash,callback){
crypto.randomBytes(48,function(err,buf){
if (err) return callback(err);
var randomString = buf.toString('hex');
return callback(null,hash,randomString);
});
},
// save them in the mongoDb using mongoose
function(hash,randomString,callback){
var userModel = new User;
userModel.email = email1;
userModel.password = hash;
userModel.verificationId = randomString;
userModel.save();
callback(null,'done');
}
],function(err){
if (err){
console.log(err);
res.send(404);
} else{
console.log("done");
res.send("200");
}
});
}
Here is my app.js file using express
// render the registration page
app.get('/users/create',register.renderUserPage);
app.post('/users/create',function(req,res){
register.createUser(req,res);
});
Here is the Db.js file which connects to mongoDb using mongoose
console.log("connection succeeded");
var UserSchema = new Schema ({
email: {type:String ,require : true ,index : {unique : true}} ,
password:{ type : String ,required: true} ,
verificationId:{type:String, required:true,index:true}
});
UserSchema.plugin(ttl,{ttl:90000000});
module.exports = mongoose.model('User',UserSchema);
I have the following code .
var redis = require("redis"),
client = redis.createClient();
user_rahul = {
username: 'rahul'
};
user_namita = {
username: 'namita'
};
client.hmset('users.rahul', user_rahul);
client.hmset('users.namita', user_namita);
var username = "rahul"; // From a POST perhaps
client.hgetall("users" , function(err, user) {
console.log(user);
});
I want to get all the users list how i can get all users list this what i tried but its not working.
You are setting the users in their own hash, so when you do hgetall users, you are trying to get all the members of the users hash. You should do:
var redis = require("redis"),
client = redis.createClient();
user_rahul = {
username: 'rahul'
};
user_namita = {
username: 'namita'
};
client.hset('users', user_rahul, 'Another Value, Pass Maybe?');
client.hset('users', user_namita, 'Another Value, Pass Maybe?');
var username = "rahul"; // From a POST perhaps
client.hgetall("users" , function(err, user) {
console.log(user);
});
You should consider using a list instead, if you dont need any data in the second hash value
How about this
var flow = require('flow'); //for async calls
var redis = require("redis").createClient();
function AddUser(user,callback){
flow.exec(
function(){
//AI for Keep unique
redis.incr('nextUserId',this);
},
function(err,userId){
if(err) throw err;
this.userId = userId;
redis.lpush('users',userId,this.MULTI());
redis.hmset('user:'+userId+':profile',user,MULTI());
},
function(results){
results.forEach(function(result){
if(result[0]) throw result[0];
});
callback(this.userId);
}
);
}
user_rahul = {username: 'rahul'};
user_namita = {username: 'namita'};
//Add user
AddUser(user_rahul,function(userId){
console.log('user Rahul Id' + userId);
});
AddUser(user_namita,function(userId){
console.log('user Namita Id' + userId);
});
//users
function Users(callback){
var users = [];
flow.exec(
function(){
redis.lrange('users',0,-1,this);
},
function(err,userIds){
if(err) throw err;
flow.serialForEach(userIds,function(userId){
redis.hgetall('user:'+userId+':profile',this);
},
function(err,val){
if(err) throw err;
users.push(val);
},
function(){
callback(users);
});
}
);
}
//call
Users(function(users){
console.log(users);
});
For Single User
function getUser(userId,callback){
redis.hgetall('user:'+ userId +':profile',function(err,profile){
if(err) throw err;
callback(profile);
});
}
getUser(1,function(profile){
console.log(profile);
});