My problem is I cannot quite figure out how to get the "name" parameter before i run the second app.get.. The first (app.get /) lets me choose between collections, and i pass the "name" param to the second app get which then i can get with req.params.name within the second app.get...
Problem is i need that param before the second app.get cuz i need to define a schema and "compile" a model, which can only be done once. Works when i click once, but i get a "cannot owerwrite model, already compiled" error when i do it again. I bypassed the problem by opening a new connection everytime i load the second app.get (not good i know).
So if anyone knows how to get that "name" param (the thing im passing as a req.param to the second app.get, BEFORE the actual second app.get fires up, would be thankful)
My code: (started learning node 2 days ago, alongside express and mongoose, not to mention javascript sp go easy on me :p)
var express = require('express')
,routes = require('./routes')
,user = require('./routes/user')
,http = require('http')
,path = require('path')
,mongoose = require("mongoose");
var app = express();
// all environments
app.set('port', process.env.PORT || 3005);
app.set('views', __dirname + '/views');
app.set('view engine', 'jade');
app.use(express.favicon());
app.use(express.logger('dev'));
app.use(express.bodyParser());
app.use(express.methodOverride());
app.use(app.router);
app.use(express.static(path.join(__dirname, 'public')));
// development only
if ('development' == app.get('env')) {
app.use(express.errorHandler());
}
conn = mongoose.createConnection("mongodb://10.42.1.31/dominik");
app.get ("/", function(req, res) {
conn.db.collectionNames(function (err, docs) {
res.render("collections", {names:docs});
});
});
app.get("/collections/:name", function (req,res) {
conn = mongoose.createConnection("mongodb://10.42.1.31/dominik");
var collName = req.params.name;
collName = collName.charAt(0).toUpperCase()+collName.slice(1);
collName = collName.substring(0, collName.length-1);
var schema = new mongoose.Schema({});
var myModel= conn.model(collName, schema);
myModel.find({},function(err, docs) {
res.json("documents",docs);
});
});
http.createServer(app).listen(app.get('port'), function(){
console.log('Express server listening on port ' + app.get('port'));
});
Related
Trying to set up a basic Express server with a basic pug template.
Can you please tell me what I'm doing wrong here?
'use strict';
//Require Express
var express = require('express');
var app = express();
//Require Pug
var pug = require('pug');
//Require Twitter
var Twitter = require('twitter');
//Set view engine to serve middleware
app.set('view engine', 'pug');
//Set where to look for templates
app.set('views', __dirname + '/templates');
//Set up style sheets
app.use('/static', express.static(__dirname + '/public'));
//Access keys to access twitter account
var config = {
"consumerKey": "",
"consumerSecret": "",
"accessToken": "",
"accessTokenSecret": ""
};
//instantiate twitter client
var client = new Twitter(config);
//Log whether
var error = function (err, response, body) {
console.log('ERROR [%s]', err);
};
var success = function (data) {
console.log('Data [%s]', data);
};
//Set up server on Port 3000
app.listen(3000, function() {
console.log("The frontend server is running on port 3000!");
});
//Render when appropriate
//Tell app to render template
app.get('/'), function(req, res){
res.render('index', {title: 'Hey', message: 'Hello there!'});
}
I'm getting back The frontend server is running on port 3000! in the console.
What am I missing?
I'd really appreciate any help please
You're calling app.get() wrong. You're doing
app.get('/'), function(req, res){
...
Which is two statements separated by the comma operator. The correct syntax is to pass the function as the second argument:
app.get('/', function(req, res){
...
});
I'm trying to verify a signed token and extract information from it using NodeJS.
I have a token named userToken in the browser right now, it has been saved after I logged in (I use auth0 to login by the way).
I tried to verify my token here manually : http://jwt.io , it works and gives me payload data without a problem. However, I can't do the same thing with NodeJS. How can I do it?
I read the docs but I couldn't get it.
https://github.com/auth0/express-jwt
Here's my server.js
var http = require('http');
var express = require('express');
var cors = require('cors');
var app = express();
var jwt = require('express-jwt');
var dotenv = require('dotenv');
dotenv.load();
var authenticate = jwt({
secret: new Buffer(process.env.AUTH0_CLIENT_SECRET, 'base64'),
audience: process.env.AUTH0_CLIENT_ID
});
// view engine setup
var path = require('path');
app.set('views', path.join(__dirname, 'views'));
app.use(express.static(path.join(__dirname, 'public')));
app.set('view engine', 'jade');
app.configure(function () {
// Request body parsing middleware should be above methodOverride
app.use(express.bodyParser());
app.use(express.urlencoded());
app.use(express.json());
app.use(cors());
app.use(app.router);
});
app.get('/', function (req, res) {
res.render('index');
});
app.get('/test', function(req,res) {
// how do I check it?
});
var port = process.env.PORT || 3001;
http.createServer(app).listen(port, function (err) {
console.log('listening in http://localhost:' + port);
});
You dont't need to implement nothing. Since you are using this express-jwt, just pass the userProperty tag to jwt:
var authenticate = jwt({
secret: new Buffer(process.env.AUTH0_CLIENT_SECRET, 'base64'),
audience: process.env.AUTH0_CLIENT_ID,
userProperty: 'payload'
});
So, you can get all of your jwt payload data using req.payload in your controllers. You can check it with console.log(req.payload).
You can see how it works here: https://github.com/auth0/express-jwt/blob/master/lib/index.js#L121
I hope it helps, and sorry about my English.
This sample should help you, it's not tested, but sure it's right way, look at source of express-jwt, it does literally same behind the scenes
app.get('/test', function(req, res) {
var jsonwebtoken = require('jsonwebtoken'); //install this, move to declarations
var loginToken = req.headers.authentication || req.body.userToken || req.headers.Bearer; //or your own, it's just headers that pass from browser to client
jsonwebtoken.verify(loginToken, new Buffer(process.env.AUTH0_CLIENT_SECRET, 'base64'), function(err, decoded) {
if(err) {
return res.status(401).send({message: 'invalid_token'});
}
//be aware of encoded data structure, simply console.log(decoded); to see what it contains
res.send(decoded); //`decoded.foo` has your value
});
});
The thing is that you must yourself encode your data, and then decode, so be aware that auth0 returns valid data structure for you (as i'm not sure otherwise)
I've created a node application with express. I try to separate the following layers which will give me the ability to test the application with unit testing...
The problem is that I don't know how to call to the router.js file which will stops in the post/get/delete application.
The server.js file looks as follows
http = require('http'),
app = require('./app')(),
http.createServer(app).listen(app.get('port'), function (err) {
console.log('Express server listening on port ' + app.get('port'));
});
This is the app.js file
var express = require('express'),
logger = require('morgan'),
bodyParser = require('body-parser'),
routesApp = require('./ro/route');
module.exports = function () {
var app = express();
app.set('port', process.env.PORT || 3005);
app.use(logger('dev'));
app.use(function (req, res, next) {
res.set('APP', 'User app');
next();
});
app.use(bodyParser.json());
app.use(routesApp);
return app;
};
This is the router.js, which will route the call to other module according to the http type like post/delete/get etc...
var handleGet = require('../controller/handleGet');
var handlePost = require('../controller/handlePost');
var express = require('express');
module.exports = function (app) {
var appRoute = express.Router();
app.use(appRoute);
appRoute.route('*')
.post(function (req, res) {
handlePost(req, res);
})
.get(function (req, res) {
handleGet(req, res)
})
Currently I've two questions:
How to make it work since when in debug It dump in
app.use(appRoute); on the router.js file?
The error is TypeError: undefined is not a function
Is it good way to structure the node app like in my post? I want to seperate all this layers like SOC, I'm fairly new to node and express and I try to build it to be modular and testable...
How to make it work since when in debug It dump in app.use(appRoute); on the router.js file? The error is TypeError: undefined is not a function
This fails because you don't pass app into the module when you require it in app.js, you would need to do something like
app.use(routesApp(app)); // <- this hurts my eyes :(
Is it good way to structure the node app like in my post?I want to sperate all this leyrs like SOC,I fairly new to node and express and I try to build it to be modular and testable...
Your definitely on the right track, keeping things separated is generally always a good idea. Testing is definitely one of the big pluses but it also helps with other things like maintainability & debugging.
Personally, I would make use of the bin directory for any start up script configuration
bin/www
var app = require('./app');
app.set('port', process.env.PORT || 3005);
var server = app.listen(app.get('port'), function() {
console.log('Express server listening on port ' + app.get('port'));
});
This will help decouple your express app from all the environment setup. This should keep your app.js clean and only contain app-related config
app.js
var express = require('express')
, app = express()
, logger = require('morgan')
, bodyParser = require('body-parser')
, routes = require('./routes.js');
app.use(logger('dev'));
app.use(function (req, res, next) {
res.set('APP', 'User app');
next();
});
app.use(bodyParser.json());
app.use('/', routes);
...
module.exports = app;
Then finally, your routes.js should do nothing but handle your URLs
routes.js
var express = require('express')
, router = express.Router()
, handleGet = require('../controller/handleGet')
, handlePost = require('../controller/handlePost');
router.get('/', handleGet);
router.post('/', handlePost);
...
module.exports = router;
I am using express node js for my redirection project.I am just beginner in express node js.
I don't know where to define my database logic.
Aim:- Getting the url from database and redirect to that url.
my directory structure:-
app.js
controller
---------index.js
node_modules
package.json
public
------images
------stylesheet
------javascripts
routes
-----index.js
views
app.js
var express = require('express')
, http = require('http')
, mysql = require('mysql')
, path = require('path');
var app = express();
var controller = require('./controller')({app: app});
// all environments
app.configure(function() {
app.set('port', process.env.PORT || 8888);
app.use(express.json());
app.use(express.urlencoded());
app.use(express.methodOverride());
app.use(app.router);
app.use(express.static(path.join(__dirname, 'public')));
app.set('view engine', 'jade');
app.set('views', __dirname + '/views');
app.use(app.router);
app.get('/', function( req, res) {
res.render('index');
});
});
//connect to mysql database
var connection = mysql.createConnection({
host : 'localhost',
user : 'root',
password : 'xxxxx',
database : 'nodejsmysql'
});
connection.connect();
http.createServer(app).listen(app.get('port'), function(){
console.log('Express server listening on port ' + app.get('port'));
});
controller
function controller(param)
{
var app = param.app;
app.get('/id', function(request, response) {
var id= request.param("id");
// i need to use this id to fetch corresponding url from database and redirect that url.
});
}
module.exports = controller;
database query:- select url from db where id='id';
Typically you create Models to handle database logic. The general pattern is
app.js - list all your routes
routesX.js - handles code for routes (say /x/whatever). This is where you evaluate HTTP values like querystring, cookies, and form data. Renders the view after calling the model.
modelsX.js - handles the domain logic for the routes (including database access)
So for example in a routesX.js you might have something like this:
var blogModel = require('./modelsX.js');
exports.blogAll = function(req, res) {
blogModel.getAll(function(data) {
res.render('someView', data);
});
}
and in your modelsX.js you might have something like this:
exports.getAll = function(callback) {
// get data from the database here
// and call the callback
callback()
}
If you want to see a full end-to-end example, check out this repo: https://github.com/hectorcorrea/hectorcorrea.com/blob/master/routes/blogRoutes.js
How do I get posted data from my api. I am using express 3.4.4
I am doing a resful api to accept posted data using node js and express
exports.mypost = function(req, res) {
console.log(req.body);
console.log(req.body.username);
console.log(req.body.name);
var user = new UserInfo({name:"dsd", username:"dsdsds"})
user.save();
res.send("user created");
}
and I post data use
curl --data "username=dsds&name=dsd" http://localhost:3000/mypost
I can see prints
{ username: 'dsds', name: 'dsd' }
dsds
dsd
But If I use
curl --form "username=dsds&name=dsd" http://localhost:3000/mypost
I see
{}
undefined
undefined
which means I didn't catch username and name from
req.body
How do I get the data from
curl --form "username=dsds&name=dsd" http://localhost:3000/mypost
I am posting my app.js:
/**
* Module dependencies.
*/
var express = require('express');
var routes = require('./routes');
var user = require('./routes/user');
var http = require('http');
var path = require('path');
var express = require('express');
var mongoose = require('mongoose');
var app = express();
// all environments
app.set('port', process.env.PORT || 3000);
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'ejs');
app.use(express.favicon());
app.use(express.logger('dev'));
app.use(express.json());
app.use(express.urlencoded());
app.use(express.methodOverride());
app.use(express.cookieParser('your secret here'));
app.use(express.session());
app.use(app.router);
app.use(require('stylus').middleware(path.join(__dirname, 'public')));
app.use(express.static(path.join(__dirname, 'public')));
app.use(express.bodyParser());
mongoose.connect('mongodb://localhost/data');
// development only
if ('development' == app.get('env')) {
app.use(express.errorHandler());
}
app.get('/', routes.index);
app.get('/users', user.list);
var api = require('./controllers/api.js');
app.post('/mypost', api.mypost);
http.createServer(app).listen(app.get('port'), function(){
console.log('Express server listening on port ' + app.get('port'));
});
Add this:
App.use(express.bodyParser());
Make sure its set before all your routes.
You can use bodyParser method to get the data from a post request
// Configure server
app.configure(function() {
app.use(express.bodyParser());
}