Personal blog written from scratch using Node.js, Bootstrap, and MySQL. https://jrtechs.net
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/**
* File which sends emails to me from
* a captcha protected form on the contact
* page.
*
* @author Jeffery Russell 8-19-18
*/
/** used for file IO */
const utils = require('../utils/utils.js');
/** used for static files */
const includes = require('../includes/includes');
/** for parsing post data */
const qs = require('querystring');
/** cleans form submission */
const sanitizer = require('sanitizer');
/** used to send post data for the captcha */
const Request = require('request');
/** sends the email using a throw away gmail account */
const nodemailer = require("nodemailer");
/** agent for sending the email */
const smtpTransport = require('nodemailer-smtp-transport');
/** Used to load the config file from the disk */
const config = require('../utils/configLoader').getConfig();
//captcha secret
const CAPTCHA_SECRET = config.CAPTCHA_SECRET;
//password to gmail account
const EMAIL_PASSWORD = config.EMAIL_PASSWORD;
const TEMPLATE_FILE = "blog/contact.html";
const whiskers = require('whiskers');
/**
* Verifies if the captcha response recieved from the post data was
* valid, or are bots trying to get around the captcha
*
* @param data captcha data from post request
* @returns {Promise} resolves whether the captcha is valid
*/
const verifyCapcha = function(data)
{
const recaptcha_url = "https://www.google.com/recaptcha/api/siteverify?" +
"secret=" + CAPTCHA_SECRET + "&" +
"response=" + data;
return sync = new Promise(function(resolve, reject)
{
Request(recaptcha_url,
function (error, response, body)
{
if (!error && response.statusCode == 200)
{
const googleAnswer = JSON.parse(body);
if(googleAnswer.success == true)
{
resolve(true);
}
else
{
resolve(false);
}
}
else
{
resolve(false);
}
}
);
});
};
/**
* Sends a email to my personal emaail address using a throw away
* gmail account
*
* @param name from contact form
* @param email from contact form
* @param message from contact form
*/
const sendEmail = function(name, email, message)
{
const transporter = nodemailer.createTransport(smtpTransport({
service: 'gmail',
host: 'smtp.gmail.com',
auth: {
user: config.GMAIL_ACCOUNT,
pass: EMAIL_PASSWORD
}
}));
const email_message_html = "<h2><b>email:</b> " + email + "</h2><br>" +
"<h2><b>name:</b> " + name + "</h2><br>" +
"<h2>message:</h2><br><p>" + message + "</p>";
const email_message_text = "email: " + email + "\n" +
"name: " + name + "\n" +
"message: \n" + message;
const mailOptions =
{
to: config.DESTINATION_EMAIL, // list of receivers
subject: "Jrtechs.net form submission", // Subject line
text: email_message_text, // plaintext body
html: email_message_html
};
// send mail with defined transport object
transporter.sendMail(mailOptions, function(error, response)
{
if(error)
{
console.log(error);
}
else
{
console.log("Message sent: " + response);
}
transporter.close(); // shut down the connection pool, no more messages
});
};
/**
* If there was post data on the contact page, it processes it to see
* if it was a valid captcha request and sends an email. If no post data was sent,
* the normal form is displayed
*
* @param request -- main express request
* @returns {Promise} renders the html of the contact widget
*/
const processContactPage = function(request, templateContext)
{
return new Promise(function(resolve, reject)
{
utils.getPostData(request).then(function(postData)
{
const data = qs.parse(postData);
if(data.name &&
data.email &&
data["g-recaptcha-response"] &&
data.message)
{
verifyCapcha(sanitizer.sanitize(data["g-recaptcha-response"]))
.then(function(valid)
{
if(valid)
{
templateContext.messageSent = true;
resolve();
sendEmail(data.name, data.email, data.message);
}
else
{
resolve();
}
});
}
else
{
resolve();
}
}).catch(function(err)
{
reject(err);
})
});
};
module.exports =
{
/**
* Displays the contact page along with the header, sidebar, and footer.
* This uses the admin header because it doesn't need any minified css
* which has been purged of some css classes which are not used in any
* of the blog blog.
*
* @param request -- main express request
* @param result -- renders the html of the contact page
*/
main: function(request, result)
{
result.writeHead(200, {'Content-Type': 'text/html'});
var templateContext = Object();
Promise.all([includes.fetchTemplate(TEMPLATE_FILE),
processContactPage(request, templateContext),
includes.printHeader(templateContext),
includes.printFooter(templateContext),
require("./sidebar.js").main(templateContext)])
.then(function (content)
{
const html = whiskers.render(content[0], templateContext);
result.write(html);
result.end();
}).catch(function(err)
{
console.log(err);
});
}
};