MOCKSTACKS
EN
Questions And Answers

More Tutorials









NodeJS Client server communication

/w Express, jQuery and Jade


//'client.jade'
//a button is placed down; similar in HTML
button(type='button', id='send_by_button') Modify data

 #modify Lorem ipsum Sender

 //loading jQuery; it can be done from an online source as well
 script(src='./js/jquery-2.2.0.min.js')
 //AJAX request using jQuery
 script
 $(function () {
 $('#send_by_button').click(function (e) {
 e.preventDefault();

 //test: the text within brackets should appear when clicking on said button
 //window.alert('You clicked on me. - jQuery');

 //a variable and a JSON initialized in the code
 var predeclared = "Katamori";
 var data = {
 Title: "Name_SenderTest",
 Nick: predeclared,
 FirstName: "Zoltan",
 Surname: "Schmidt"
 };

 //an AJAX request with given parameters
 $.ajax({
 type: 'POST',
 data: JSON.stringify(data),
 contentType: 'application/json',
 url: 'http://localhost:7776/domaintest',
 //on success, received data is used as 'data' function input
 success: function (data) {
 window.alert('Request sent; data received.');

 var jsonstr = JSON.stringify(data);
 var jsonobj = JSON.parse(jsonstr);

 //if the 'nick' member of the JSON does not equal to the predeclared string
(as it was initialized), then the backend script was executed, meaning that communication has been
established
 if(data.Nick != predeclared){
 document.getElementById("modify").innerHTML = "JSON changed!\n" +
jsonstr;
 };

 }
 });
 });
 });
//'domaintest_route.js'
var express = require('express');
var router = express.Router();
//an Express router listening to GET requests - in this case, it's empty, meaning that nothing is
displayed when you reach 'localhost/domaintest'
router.get('/', function(req, res, next) {
});
//same for POST requests - notice, how the AJAX request above was defined as POST
router.post('/', function(req, res) {
 res.setHeader('Content-Type', 'application/json');
 //content generated here
 var some_json = {
 Title: "Test",
 Item: "Crate"
 };
 var result = JSON.stringify(some_json);
 //content got 'client.jade'
 var sent_data = req.body;
 sent_data.Nick = "ttony33";
 res.send(sent_data);
});
module.exports = router;


Conclusion

In this page (written and validated by ) you learned about NodeJS Client server communication . What's Next? If you are interested in completing NodeJS tutorial, your next topic will be learning about: NodeJs Design Fundamental.



Incorrect info or code snippet? We take very seriously the accuracy of the information provided on our website. We also make sure to test all snippets and examples provided for each section. If you find any incorrect information, please send us an email about the issue: mockstacks@gmail.com.


Share On:


Mockstacks was launched to help beginners learn programming languages; the site is optimized with no Ads as, Ads might slow down the performance. We also don't track any personal information; we also don't collect any kind of data unless the user provided us a corrected information. Almost all examples have been tested. Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content. By using Mockstacks.com, you agree to have read and accepted our terms of use, cookies and privacy policy.