Last active
January 13, 2019 14:11
-
-
Save jaxbot/5ed663393cf051d56b92 to your computer and use it in GitHub Desktop.
Node.js recaptcha example 2 (using AJAX instead of forms) https://jaxbot.me/articles/new-nocaptcha-recaptcha-with-node-js-express-12-9-2014
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| <!doctype html> | |
| <html> | |
| <head> | |
| <script src='https://www.google.com/recaptcha/api.js'></script> | |
| <script> | |
| function registerAPI(form) { | |
| var params = { | |
| username: form.username.value, | |
| password: form.password.value, | |
| email: form.email.value, | |
| recaptcha: document.getElementById("g-recaptcha-response").value | |
| }; | |
| var xhr = new XMLHttpRequest(); | |
| xhr.open("POST", "/register"); | |
| xhr.onload = function() { | |
| var json = JSON.parse(xhr.responseText); | |
| console.log(json); | |
| if (json.registeredSuccessfully) { | |
| showSuccess(); | |
| } else { | |
| showError(json.reason); | |
| } | |
| } | |
| xhr.setRequestHeader("Content-type", "application/json"); | |
| xhr.send(JSON.stringify(params)); | |
| } | |
| function showSuccess() { | |
| document.getElementById("form").style.display = "none"; | |
| document.getElementById("success").style.display = "block"; | |
| } | |
| function showError(err) { | |
| document.getElementById("error").innerHTML = err; | |
| } | |
| </script> | |
| </head> | |
| <body> | |
| <h1>Register for test site</h1> | |
| <form action="register" method="post" onsubmit="registerAPI(this);return false;" id="form"> | |
| <span id="error"></span><br> | |
| <input type="text" name="username" placeholder="Username"><br> | |
| <input type="text" name="email" placeholder="Email"><br> | |
| <input type="password" name="password" placeholder="Password"><br> | |
| <div class="g-recaptcha" data-sitekey="sitekey here"></div> | |
| <input type="submit" value="Register"> | |
| </form> | |
| <div id="success" style="display:none"> | |
| Successfully registered, yay. | |
| </div> | |
| </body> | |
| </html> |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| var express = require('express'); | |
| var bodyParser = require('body-parser'); | |
| var engines = require('consolidate'); | |
| var app = express(); | |
| var https = require('https'); | |
| app.use(bodyParser.json()); | |
| app.engine('html', engines.hogan); | |
| app.get('/', function(req, res) { | |
| res.render('form.html'); | |
| }); | |
| app.post('/register', function(req, res) { | |
| verifyRecaptcha(req.body["recaptcha"], function(success) { | |
| if (success) { | |
| res.end(JSON.stringify({ registeredSuccessfully: true })); | |
| // TODO: do registration using params in req.body | |
| } else { | |
| res.end(JSON.stringify({ registeredSuccessfully: false, reason: "Captcha failed, try again." })); | |
| // TODO: take them back to the previous page | |
| // and for the love of everyone, restore their inputs | |
| } | |
| }); | |
| }); | |
| app.listen(3000); | |
| var SECRET = "secret from webpage here"; | |
| // Helper function to make API call to recatpcha and check response | |
| function verifyRecaptcha(key, callback) { | |
| https.get("https://www.google.com/recaptcha/api/siteverify?secret=" + SECRET + "&response=" + key, function(res) { | |
| var data = ""; | |
| res.on('data', function (chunk) { | |
| data += chunk.toString(); | |
| }); | |
| res.on('end', function() { | |
| try { | |
| var parsedData = JSON.parse(data); | |
| console.log(parsedData); | |
| callback(parsedData.success); | |
| } catch (e) { | |
| callback(false); | |
| } | |
| }); | |
| }); | |
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| { | |
| "name": "nodejs-recaptcha", | |
| "version": "1.0.0", | |
| "description": "", | |
| "main": "index.js", | |
| "scripts": { | |
| "test": "echo \"Error: no test specified\" && exit 1" | |
| }, | |
| "author": "", | |
| "license": "ISC", | |
| "dependencies": { | |
| "consolidate": "^0.10.0", | |
| "express": "^4.10.4", | |
| "hogan.js": "^3.0.2" | |
| } | |
| } |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Hi i am facing this issue
app.post('/signup', function (req, res, next) {
var recaptcha =req.body['g-recaptcha-response'] ;
if(recaptcha.lenght === undefined || recaptch === '' ||recaptcha ===null){
//here i need to display the alert message in node js application
return false;
}
else
{ console.log('before verifyRecaptcha');
console.log(req.body['g-recaptcha-response']);
return next();
}
},
can any one help me how to alert the user if recaptcha not added.