I have an html file (home.html) and a node.js file (app.js).I used mysql also.What i have now is the app.js that is the server side that looks like this:
var application_root = __dirname,
express = require("express"),
mysql = require('mysql');
path = require("path");
var app = express();
var http = require('http');
var connection = mysql.createConnection({host : '127.0.0.1',user : 'root', password : '',database: "medical"
});
app.configure(function () {
app.use(express.bodyParser());
app.use(express.methodOverride());
app.use(app.router);
app.use(express.static(path.join(application_root, "public")));
app.use(express.errorHandler({ dumpExceptions: true, showStack: true }));
});
app.get('/getallusers/:email', function (req, res) {
connection.connect();
//var json = '';
connection.query('SELECT * FROM users where email = '+req.params.email, function (error, rows, fields) {
str='';
for(i=0;i<rows.length;i++)
str = str + rows[i].email +'\n';
// res.end( str);
res.end( str);
// json = JSON.stringify(rows); //displaying json file
//res.send(json);
});
connection.end();
});
And in my home.html i have a text box and a button that represents a search action to do that retrieves data from the database :
<div class="search" id = "page_content1">
<h1>Enter Candidate's email: </h1>
</br>
<form method="get" action="http://127.0.0.1:1212/getallusers/email">
<input type="text" name="email" id="email">
<input type="submit" name="commit" value="search" id = "search" onclick="display()"/>
</form>
</div>
Now I want to have the results retrieved by the query in app.js file to be displayed in my home.html file,any help on how to do that?
Related
I use Node.js express + PostgreSQL
How to pass the path to my CSV file through Node.js in a BD query ?
I have and html form which is having file input like -
<form method="post" action="import_csv" target="_blank" enctype="multipart/form-data" >
<p><input type="file" name="csv_file">
<input type="submit" value="submit"></p>
</form>
After, I have redirected this post request to the following method of controller (server).
app.post("/import_csv_file",urlencodedParser,function(req,res) {
var config = {
user:'postgres',
database:'mybd',
password: '1',
host:'localhost',
port:5432,
max:10,
idleTimeoutMillis: 30000
}
var pool = new pg.Pool(config)
pool.connect(function(err, client, done){
console.log("teacher")
if(err){
return console.error('error')
}
file_path = req.body.csv_file
console.log(file_path)
client.query("select * from import_csv($1,$2)",[log2,req.body.csv_file], function(err, result) {
done()
req.session.user2 = result
if (err){
res.end()
return console.error("error")
}
res.render('import_csv_file',{jour:result}})
})
})
The result I am getting here is - undefined (console.log(req.body.csv_file))
How do I pass the path to my CSV file to a database query so that everything works
Thank you all for your help !
installer multer and next
const path = require('path')
var multer = require('multer');
const upload = multer({ dest: '/tmp/' });
app.post("/import_csv_file",upload.any(),function(req,res) {
var config = {
user:'postgres',
database:'mybd',
password: '1',
host:'localhost',
port:5432,
max:10,
idleTimeoutMillis: 30000
}
var pool = new pg.Pool(config)
pool.connect(function(err, client, done){
console.log("teacher")
if(err){
return console.error('error')
}
console.log(req.body);
console.log(req.files);
const file = req.files[0];
console.log(file)
console.log(file.path)
client.query("select * from import_csv($1,$2)",[log2,file.path], function(err, result) {
done()
req.session.user2 = result
if (err){
res.end()
return console.error("error")
}
res.render('import_csv_file',{jour:result}})
})
})
and html
<form method="post" action="inside_teacher_import_ocenka" target="_blank" enctype="multipart/form-data">
<p><input type="file" name="csv_ocenka">
<input type="submit" value="Отправить"></p>
</form>
I was trying to send more then one FORM, but I get an error.
The first FORM works the second one doesn't. It's the same form.
The second one gives me an error Cannot POST /ha
<body>
<form action="/ha" method="post">
<input type="text" name="user">
<input type="submit" value="Senden">
</form>
<form action="/Gehalt" method="post">
<input type="text" name="user">
<input type="submit" value="Senden">
</form>
</body>
this is my test.js
const sqlite3 = require('sqlite3').verbose();
const express = require('express');
const bodyParser = require('body-parser')
var app = express();
let Gehalt
let r
app.use(bodyParser.urlencoded({
extended: true
}));
let db = new sqlite3.Database('memory.sqlight3', sqlite3.OPEN_READWRITE, (err) => {
if (err) {
console.error(err.message);
}
console.log('Connected to the chinook database.');
});
app.get('/', function(req, res) {
res.sendFile(__dirname + '/test.html');
});
app.post('/ha', function(req, res) {
console.log("Yout got it");
r = req.body.user;
var stmt = db.prepare('INSERT INTO lorem (Salary) VALUES(?);');
stmt.run(r);
stmt.finalize();
db.close();
});
app.post('/Gehalt', function(req, res) {
console.log("Yout got it");
r = req.body.user;
var stmt = db.prepare('INSERT INTO lorem (Outgoings) VALUES(?);');
stmt.run(r);
stmt.finalize();
db.close();
});
app.listen(3100, function() {
console.log('GO to Port 3100');
});
What did I do wrong?
i am accessing the username field from the login.html file present in public folder to index.js file which is outside of public folder.
here is my login.html code which is in public folder
<!DOCTYPE html>
<html>
<head>
<title>login</title>
</head>
<body>
<h2> login to chat application </h2>
<form method = "post" action='/user'>
<div class="container">
<label><b>Username</b></label>
<input type="text" id="username" placeholder="Enter Username" name="name" >
<button type="submit">Login</button>
</div>
</div>
</form>
</body>
</html>
here is my index.js file which is outside of public folder and i a accessing through route /user.
var express = require('express');
var socket = require('socket.io');
var mongoose = require('mongoose');
var app = express();
var dbPath = "mongodb://localhost/chat";
// command to connect with database
db = mongoose.connect(dbPath);
mongoose.connection.once('open', function() {
console.log("database connection open success");
});
var server = app.listen(8000,function(){
console.log("The server is listening on the port 8000");
});
app.use(express.static('public'));
app.get('/user', function(req,res){
res.sendFile(__dirname + '/public/login.html');
})
app.post('/user', function(req,res){
if(req.body.name === undefined){
console.log("user not found");
}
else{
console.log("upto here")
res.sendFile(__dirname + '/public/index.html');
}
})
var io = socket(server);
io.on('connection', function(socket){
socket.on("chat", function(data){
io.sockets.emit("chat", data);
});
socket.on("typing", function (data){
socket.broadcast.emit("typing", data);
});
});
i have chat application accesing username from frontend page and using it to the chat file.
here i am unable to accessing the name="username" field to req.body.username please rectify me.
You need to use the body-parser package : https://www.npmjs.com/package/body-parser
const bodyParser = require('body-parser');
app.use(bodyParser.urlencoded({ extended: false }));
app.use(bodyParser.json());
the code below is pretty messy so don't judge too much! I am trying to POST a basic user profile into my database, i don't think i am far off but i keep getting a 404.
im pretty knew to all of these technologies so could somebody please enlighten me as to what i have done wrong.
node.js POST method
var express = require('express');
var router = express.Router();
var mongo = require('mongodb');
var assert = require('assert');
var url = 'mongodb://localhost:27017/local';
/* GET home page. */
router.get('/', function(req, res, next) {
res.render('signIn', { title: 'signIn' });
});
router.get('/getData', function(req, res, next){
mongo.connect(url, function (err, db) {
assert.equal(null, error);
var cursor = db.collection('userData').find();
cursor.forEach(function(doc, err){
assert.equal(null, err);
resultArray.push(doc);
}, function() {
db.close();
res.render('index', {items: resultArray});
} );
});
});
router.post ('/insert', function(req,res,next) {
var item = {
email: req.body.email,
firstName: req.body.firstName,
lastName: req.body.lastName,
password: req.body.password
};
mongo.connect(url, function (err, db) {
assert.equal(null, err);
db.collection('userData').insertOne(item, function (err, result) {
assert.equal(null, err);
console.log('item has been inserted');
db.close;
});
});
res.redirect('/');
});
module.exports = router;
form HTML
<!DOCTYPE html>
<html lang="en">
<head>
<title>SignIn Page</title>
<link rel="stylesheet" type="text/css" href="/stylesheets/signIn.css"/>
</head>
<body>
<div class="background">
<div class="loginFormWrapper">
<form action="/users/submit" method="POST">
<div class="loginForm">
<label for="firstName">First name:</label>
<input type="text" class="form-control" id="firstName" name="firstName" placeholder="first name">
<label for="lastName">Last name:</label>
<input type="text" class="form-control" id="lastName" name="lastName" placeholder="last name">
<label for="email">Email address:</label>
<input type="email" class="form-control" name="email" id="email" placeholder="email">
</div>
<div class="form-group">
<label for="pwd">Password:</label>
<input type="password" class="form-control" name="password" id="password" placeholder="password">
</div>
<div class="checkbox">
<label><input type="checkbox"> Remember me</label>
</div>
<button type="submit" class="btn btn-default">Submit</button>
</form>
<form action="users" method="GET">
<button type="submit" class="btn btn-default">get result</button>
</form>
</div>
</div>
</body>
</html>
App.js
var express = require('express');
var path = require('path');
var favicon = require('serve-favicon');
var logger = require('morgan');
var cookieParser = require('cookie-parser');
var bodyParser = require('body-parser');
var validate = require('form-validate');
var mongoose = require('mongoose');
var index = require('./routes/index');
var users = require('./routes/users');
var About = require('./routes/about');
var signIn = require('./routes/signIn');
var contact = require('./routes/contact');
var app = express();
// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'ejs');
// uncomment after placing your favicon in /public
//app.use(favicon(path.join(__dirname, 'public', 'favicon.ico')));
app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true }));
app.use(bodyParser.json());
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));
app.use('/', index);
app.use('/users', users);
app.use('/About', About);
app.use('/signIn', signIn);
// app.use('/contact', contact);
//catch 404 and forward to error handler
app.use(function(req, res, next) {
var err = new Error('Not Found');
err.status = 404;
next(err);
});
// error handler
app.use(function(err, req, res, next) {
// set locals, only providing error in development
res.locals.message = err.message;
res.locals.error = req.app.get('env') === 'development' ? err : {};
// render the error page
res.status(err.status || 500);
res.render('error');
});
module.exports = app;
user.js
var express = require('express');
var app = require("mongoose");
var router = express.Router();
/* GET users listing. */
router.get('/', function(req, res, next) {
res.send('respond with a resource');
});
module.exports = router;
A quick reminder, the post() method just gets the data from the <form> you specify. For you to be able to get that data you'd have to do something like this.
app.js
const express = require('express)
const mongoose = require('mongoose)
var app = express()
mongoose.connect('mongodb://localhost:"yourPortHere"/"mongoDBhere"')
Now post needs the body parser in order to be able to retrieve the data and sort of "translate it" to JS, for that you need the body parser.
app.use(bodyParser.urlencoded({extended: false})) //Post Body Parser
Now let's get to the post
app.post("/action", (req, res) => {
var userData = {
username: req.body.username,
password: req.body.password
}
For the moment userData is going to hold the data you just retrieved from the <form>
Remember that action="/YourActionHere is the identifier for the app.post("/YourActionHere") so those two have to match, otherwise you will not get the data.
To save it to MongoDB you first need to create a model of the object you want to store, if MongoDB has a Database named movies with a directory named films on it you first have to create a Model named film since mongoose will save it in the directory films (<- By directory I mean collection)
So: in folder Models you create a model of the object
const mongoose = require('mongoose')
const Schema = mongoose.Schema
var film = new Schema({
title: String,
year: String,
director: String
})
module.exports = mongoose.model("movie", movieSchema)
To be able to use that new Schema you have to import it in you app.js with
var Film = require('pathToFilmSchema')
Now in your post you will save userData to that Schema, and mongoose will store it in the collection specified in its .js.
app.post("/action", (req, res) => {
var userData = {
title: req.body."name",
year: req.body."name",
director: req.body.""
}
new Film(userData)
})
If the structure is the same de Data in that variable will be stored in a Schema, then you just have to call the method .save(), which you can call right after like this
newFil(userData)
.save()
Now mongoose will store a new object with film Schema into the database you have connected at the top. Keep in mind that, if you don't have a collection named film mongoDB will create one collection named films (the plural, always) and store the Schema there.
After saving you can res.redirect() to "/" or render another page, that's up to you.
You have posted to url users/submit but i don't see any API for users/submit . You have said to use users for /users urls but have you defined the /submit within /users?
You could go through this
Routing in expressjs
Inside your app.post function you should have something like this:
let MongoClient = require('mongodb').MongoClient;
let connectionUrl = "mongodb://localhost:27017/";
// or
// let connectionUrl = "mongodb+srv://<username>:<password>#<your-cluster-url>/test?retryWrites=true&w=majority";
// creating the message object
let obj = {"text" : "Something"};
console.log("OBJ: " + obj);
MongoClient.connect(connectionUrl, function(err, client) {
if (err) throw err;
console.log("Connected correctly to server");
// if database and collection do not exist they are created
var db = client.db('YourDatabase')
db.collection("YourCollection").insertOne(obj, function(err, res) {
if (err) throw err;
console.log("1 message inserted");
client.close();
});
});
I am trying to post and insert data from html form using node.js but I am having problem posting data from HTML form to node.js and extracting the data passed it always undefined for inserting in database using node-mysql I am new with node.js
Here is my app.js code
var app = require('express')();
var server = require('http').Server(app);
var io = require('socket.io')(server);
var bodyParser = require('body-parser');
var jsonParser = bodyParser.json()
var sql = require('mysql');
var connection = sql.createConnection({
host : 'localhost',
user : 'root',
password : '',
port : '3306',
database : 'node'
});
server.listen(3000);
app.get('/nodeThis', function (req, res) {
res.sendFile(__dirname + '/insert.html');
});
app.use(bodyParser.json())
app.post('/nodeThis', jsonParser, function (req, res) {
var post={user_name:req.body.name1,user_what:req.body.what,user_why:req.body.why};
console.log(post);
});
Here is my HTML form:
<html>
<body>
<div>
<form action="/nodeThis" method="post">
<input type="text" name="name1">
<input type="text" name="what">
<input type="text" name="why">
<button class="boom">Submit</button>
</form>
</div>
</body>
</html>