I'm trying to build a mini app in express, the "database" I'm using is a local array object file, I can retrieve resources from this "database" but for some reason I'm not able to post (push) a new object to this object array. This is how the code looks like:
server.js:
const express = require('express');
const app = express();
const userRouter = require('./routes/user.js');
const port = process.env.PORT || 3000;
app.use(express.json());
app.use(express.text());
app.use('/user', userRouter);
app.listen(3000, () => console.log(`listening at ${port}`));
user.js:
const express = require('express');
const BBDD = require('./BBDD.js');
const userRouter = express.Router();
userRouter.get('/:guid', (req, res, next) => {
const { guid } = req.params;
const user = BBDD.find(user => user.guid === guid);
if (!user) res.status(404).send()
res.send(user);
next();
});
userRouter.post('/', (req, res, next) => {
let user = {};
user.name = req.body.name;
user.id = req.body.id;
BBDD.push(user);
next();
});
module.exports = userRouter;
And this is my local "database" file I want to perform logical CRUD operations:
BBDD.js
const BBDD = [{
index: 0,
guid: "1",
name: "Goku"
},
{
index: 1,
guid: "2",
name: "Vegeta"
},
];
module.exports = BBDD;
this is how I try to post a new resource, and this is the error I get:
It seems to be in order, but it won't work and can't find the bug.
Remove the next and send a response .express is having trouble finding the next matching handler because there is none
Related
when I tried to connect my application with API I'm getting error in my localhost saying
"status": "fail",
"message": "Can't find / on this server",
"error": { statusCode: 404, status: "fail", isOperational: true },
"stack": "Error: Can't find / on this server\n at C:\\Users/*/*app.js:66",
here is my app.js
const express = require("express");
const morgan = require("morgan");
const rateLimit = require("express-rate-limit");
const helmet = require("helmet");
const mongoSanitize = require("express-mongo-sanitize");
const xss = require("xss-clean");
const hpp = require('hpp');
const AppError = require("./API/Utils/appError");
const globalErrorHsndler = require("./API/controllers/errorController");
const usersRouter = require("./API/routes/usersRoute");
const app = express();
app.use(express.json({ limit: "10kb" }));
// DATA SANITIZATION against NoSQL query injection
app.use(mongoSanitize());
// DATA SANITIZATION against site script XSS
app.use(xss());
// PREVENT PARAMETER POPULATION
app.use(
hpp({
whitelist: [
"duration",
"difficulty",
"price",
"maxGroupSize",
"ratingsAverage",
"ratingsQuantity",
],
})
);
// SECURE HEADER HTTP
app.use(helmet());
//RATE LIMIT
const apiLimiter = rateLimit({
windowMs: 60 * 60 * 1000, // 15 minutes
max: 100, // limit each IP to 100 requests per windowMs
message: "Too many requests, please try again later"
});
// apply to specific routes
app.use("/api", apiLimiter);
app.use(morgan("dev"));
//CUSTOM MIDDLE WARE
app.use((req, res, next) => {
console.log("Hey i am from middleware function 👋");
next();
});
app.use((req, res, next) => {
req.requestTime = new Date().toISOString();
next();
});
app.use("/api/v1/users", usersRouter);
//ERROR SECTION
app.all("*", (req, res, next) => {
console.log(`Received request for url: ${req.originalUrl}`);
const error = new AppError(`Can't find ${req.originalUrl} on this server`, 404);
console.log(`Data inside next AppError: ${error}`);
next(error);
});
//GLOBAL ERROR HANDLEING
app.use(globalErrorHsndler);
module.exports = app;
here is my userRouter.js
const express = require("express");
const userControllers = require("./../controllers/userControllers");
const authController = require("./../controllers/authController");
const router = express.Router();
router.post("/signup", authController.signup);
router.post("/login", authController.login);
router.post("/forgotPassword", authController.forgotPassword);
router.patch("/resetPassword/:token", authController.resetPassword);
router.patch("/updateMyPassword", authController.protect, authController.updatePassword);
router.patch("/updateMe", authController.protect, userControllers.updateMe);
router.delete("/deleteMe", authController.protect, userControllers.deleteMe);
//ROUTERS USERS
router
.route("/")
.get(userControllers.getAllUsers)
.post(userControllers.createUser);
router
.route("/:id")
.get(userControllers.getSingleUser)
.patch(userControllers.updateUser)
.delete(userControllers.deleteUser);
module.exports = router;
and here is server.js
const dotenv = require("dotenv");
const mongoose = require("mongoose");
const app = require("./app");
const next = require("next");
const port = process.env.PORT || 3000;
const dev = process.env.NODE_ENV !== "production";
const server = next({ dev });
const handle = server.getRequestHandler();
process.on("uncaughtException", err=>{
console.log("uncaughtException Shutting down Application");
console.log(err.name, err.message);
process.exit(1);
});
dotenv.config({ path: "./config.env" });
const DB = process.env.DATABASE.replace(
"<PASSWORD>",
process.env.DATABASE_PASSWORD
);
mongoose
.connect(DB, {
useCreateIndex: true,
useFindAndModify: false,
useNewUrlParser: true,
})
.then((con) => {
console.log("DB Connection Successfully");
})
server.prepare().then(() => {
app.get("*", (req, res) => {
return handle(req, res);
});
app.listen(port, () => {
console.log(`App running on port ${port}....`);
});
});
process.on("unhandledRejection", (err) => {
console.log("unhandledRejection Shutting down Application");
console.log(err.name, err.message);
server.close(() => {
process.exit(1);
});
});
I need to ask from experts as I'm new to this
I can't seem to get the data from this post call. The body shows as an empty object {}.
I've tried several versions including these posts with no luck: Express.js req.body undefined
I've also tried different content-types, but that also hasn't worked.
Thoughts? Thanks in advance.
index.js:
const express = require('express')
const bodyParser = require('body-parser')
const app = express()
const db = require('./queries.js')
const port = 7000
// create application/json parser
var jsonParser = bodyParser.json()
// create application/x-www-form-urlencoded parser
var urlencodedParser = bodyParser.urlencoded({ extended: false })
app.get('/', (req, res) => {
res.json({
info: 'Node.js, Express, and Postgres API'
})
})
app.post('/jothook/', jsonParser, db.jothook)
app.listen(port, () => {
console.log(`App running on port ${port}.`)
})
queries.js:
const Pool = require('pg').Pool
const { req } = require('express');
const pool = new Pool({
user: 'testuser',
host: '167.XX.XX.XX',
database: 'testdb',
password: 'testpwd',
port: 5432,
})
const jothook = (req, res) => {
var qy = JSON.stringify(req.body);
var qy = 'INSERT INTO data_test VALUES ' + qy;
pool.query(qy, (error, results) => {
if (error) {
throw error
}
res.status(201).send(`Data Inserted`)
})
};
module.exports = {
jothook
};
post call:
{headers={Content-Type=application/json}, body="'test_data', 'joe', 'smith'", method=POST, mode=cors}
I have researched on this but nothing seems to satisfy my need. I have an express route connected to a mongodb. Below is part of the code.
const express = require('express');
const socketIo = require("socket.io");
const dbconnect = require("./models");
const handle = require("./handlers");
const routes = require("./routes");
const app = express();
app.use('/messages', routes.messages);
const PORT = 3000;
const server = app.listen(3000, function() {
console.log(`Listening on 3000`);
dbconnect().then(() => {
console.log("MongoDb connected");
});
});
const io = socketIo(server);
io.on('connection', function(client) {
console.log('Connected...');
});
My route looks like this:
const router = require('express').Router();
const handle = require('../handlers/messages');
router.post('/unread_messages', handle.unread_messages);
module.exports = router;
My handler looks like this:
const db = require("../models");
exports.unread_messages = async (req, res, next) => {
try {
const unreadmessages = await db.messages.countDocuments({ $and: [{receiver: req.body.receiver},
{ messageread: false }]});
return res.json({ unreadmessages });
} catch (err) {
return next({ status: 400, message: `Cannot get unread messages ${err}` });
}
};
I would like to add socket to the "/unread_messages" route so that I get an update of the count of unread messages in realtime. How do I do that?
I'm trying to use the Express Router with Next.js using their custom-express-server example as my boilerplate. The only difference is that I'm trying to define the routes externally on routes/router.js as follows:
Code in server.js:
const express = require('express')
const next = require('next')
const port = parseInt(process.env.PORT, 10) || 3000
const dev = process.env.NODE_ENV !== 'production'
const app = next({ dev })
const handle = app.getRequestHandler()
const routes = require('./routes/router')
app.prepare()
.then(() => {
const server = express()
server.use('/', routes)
server.get('*', (req, res) => {
return handle(req, res)
})
server.listen(port, (err) => {
if (err) throw err
console.log(`> Ready on http://localhost:${port}`)
})
})
module.exports = app;
Code in routes/router.js:
const express = require('express'),
app = require('../server.js'),
router = express.Router();
router.get('/a', (req, res) => {
return app.render(req, res, '/b', req.query)
})
router.get('/b', (req, res) => {
return app.render(req, res, '/a', req.query)
})
router.get('/posts/:id', (req, res) => {
return app.render(req, res, '/posts', { id: req.params.id })
})
module.exports = router;
At this point, even when I'm importing "app" from server.js, app is not available within router.js.
Is my logic incorrect?
If it's not, then why is app not available within router.js?
Just solved it. This issue is known as a circular dependency, and it should be avoided at all costs... unless the pattern you're using (like the boilerplate I used, I guess...) requires it.
To solve it, just export from file "A" the dependency that file "B" uses before you require file "B" on file "A".
...And that's it pretty much.
You might also try using next-routes, which I use on all of my Next project:
// server.js
const { createServer } = require('http');
const next = require('next');
const routes = require('./routes');
const port = parseInt(process.env.PORT, 10) || 3000;
const dev = process.env.NODE_ENV !== 'production';
const app = next({ dev });
const handler = routes.getRequestHandler(app);
app.prepare().then(() => {
createServer(handler).listen(port, err => {
if (err) {
throw err;
}
console.log(`> Ready on http://localhost:${port}`);
});
});
Then you can configure your routes in the routes.js file without accessing the app:
// routes.js
const nextRoutes = require('next-routes');
const routes = (module.exports = nextRoutes());
routes
.add('landing', '/')
.add('blog', '/blog', 'blog')
.add('blog-post', '/blog/:postId', 'blog')
GET /user/me - sends back 404 (resource not found)
If I change the second '/' to a '_' (i.e GET users_me), then it works.
I have two questions:
1) How to fix it so I can use 'GET /user/me'?
2) It works with an underscore so is there any advantage to using the slash vs. the underscore?
///////////Code
require('./config/config');
const _ = require('lodash');
const express = require('express');
const bodyParser = require('body-parser');
const {ObjectID} = require('mongodb');
//const multer = require('multer');
//const router = express.Router();
var renameKeys = require('rename-keys');
var {mongoose} = require('./db/mongoose');
//var {Todo} = require('./models/todo');
var {User} = require('./models/user');
var {authenticate} = require('./middleware/authenticate');
var app = express();
const port = process.env.PORT;
app.use(bodyParser.json());
// GET users/me
app.get('/users_me', authenticate, (req, res) => {
res.send(req.user);
});
// POST /users -- signing up a new user [how will this handle logging in instead of signing up?]
app.post('/users', (req, res) => {
var body = _.pick(req.body, ['email', 'password']);
var user = new User(body);
user.save().then(() => {
return user.generateAuthToken();
}).then((token) => {
res.header('x-auth', token).send(user);
}).catch((e) => {
res.status(400).send(e);
})
});
app.listen(port, () => {
console.log(`Started up at port ${port}`);
});
module.exports = {app};
First question:
Just change
app.get('/users_me', authenticate, (req, res) => {
res.send(req.user);
});
to
app.get('/users/:me', authenticate, (req, res) => {
res.send(req.user);
});
Then make a Get request:
somehost:someport/users/myusername
Second question:
Routing works just like a file-system:
/path/subpath/
So you can't use an underscore to substitute a slash '/'
INFO: You could pass the id or name (depends on your logic) of the user in the URL of your GET-request:
GET request (in this case to localhost with port 3000):
localhost:3000/users/getuserbyid/20
route:
router.get('/getuserbyid/:id', .....
Hope that helps ;)