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I'm having a cannot POST when attempting to submit a form with JS

I am having an issue with my Javascript and HTML where when I submit my form, I get a Cannot POST error. I already looked at Shows error "Cannot POST" when I try to submit the HTML form, but that seems to be server-based. I'm sorry, but I'm doing this for a class, so I'm in a bit of a time crunch right now.
My login JS code:
function login(){
var pw = document.forms['login']['passcode'].value;
var email = document.forms['login']["email"].value;
var login = userLogin().get();
if(email == "adrian#tissue.com" && pw == "welcome1"){
window.location = "issues.html";
}
else if(email == "admin#tissue.com" && pw == "admin123"){
window.location = "subscription-dashboard.html"
}
else if(email == login[0] && pw == login[1]){
window.location = "issues.html";
}
else{
alert("That password/email is incorrect");
return false;
};
}
My module for get is:
(function userLogin(){
return {
store: function(password, email){
sessionStorage.setItem(pass, password);
sessionStorage.setItem(user, email);
return false;
},
get: function(){
var mail = sessionStorage.getItem(user);
var pwkey = sessionStorage.getItem(pass);
var loginfo = [mail, pwkey];
return loginfo;
}
}
});
And my HTML code is:
<form action="#" name="login" method="post" onsubmit="return login()">
<input type="text" name="email" placeholder="Email" required>
<input type="password" name="passcode" placeholder = "Password" required>
<input type="submit" value="login">
</form>
Here's my fiddle for ease. I'm using Brackets and this class is Client side JS.
https://jsfiddle.net/MiguelPi/nmp6oxat/1/

Seems like you are trying to access to an anonymous function, rewrite userFunction like this (without external parentheses):
function userLogin(){
return {
store: function(password, email){
sessionStorage.setItem(pass, password);
sessionStorage.setItem(user, email);
return false;
},
get: function(){
var mail = sessionStorage.getItem(user);
var pwkey = sessionStorage.getItem(pass);
var loginfo = [mail, pwkey];
return loginfo;
}
}
}

Page isn't working error, Node js freezes

I'm using Node for the first time and am having trouble when a certain response is triggered. In this case, I'm checking if the username and pw matches what I have in DynamoDB. It redirects to my page when the username and pw don't match my db, but when it does, all of my console.log output prints twice (which apparently has something to do with the favicon in Chrome) like "online" and "[pw] + database.js," but it also freezes my IDE and terminal. I then see the "The page isn't working, localhost didn't send any data" error in my browser. Ignore the privacy problems :) Thoughts?
database.js:
var myDB_lookup = function(username, password, route_callbck){
console.log('Looking up: ' + username);
users.get(username, function (err, data) {
if (err) {
route_callbck(null, "Lookup error: "+err);
} else if (data == null) {
route_callbck(null, null);
} else {
// JSON object that stores password & fullname
var value = JSON.parse(data[0].value);
var pw = value.password;
if (pw.valueOf() == password.valueOf()){
route_callbck({ password : pw }, null);
console.log(pw + "database.js");
}else{
//console.log('wrong password');
route_callbck(null, null);
}
}
});
};
routes.js:
var checkLogin = function(req,res){
var user = req.body.username;
var pw = req.body.password;
console.log(user + pw + "routes");
db.lookup(user, pw, function(data, err) {
if (data!=null){
console.log("online");
//req.session.username = user;
//req.session.password = pw;
}else{
res.render('main.ejs',{error:"Fields incorrect"});
}
});
};
main.ejs:
<form method="post" action="/checklogin">
Enter username here: <br>
<input type="text" name="username" placeholder = "Your username"> <br>
Enter password here: <br>
<input type="password" name="password" placeholder = "Your password">
<input type="submit" value="Log In">
</form>
The functions are all linked up in routes.js when I do module.exports = ...

You probably forget to send the response, make sure
res.render() or res.json() or res.send() gets hit
you should put a try/catch around JSON.parse(), that's a best practice.
Looks like your culprit is here:
if (data!=null){
console.log("online");
//req.session.username = user;
//req.session.password = pw;
// you need to send the response here too! <<<<<
res.render('main.ejs'); //// !!!
}else{
res.render('main.ejs',{error:"Fields incorrect"});
}

Mousedown still submitting form, when it should not

hello i have a login validation form which uses a mix of jquery and ajax to do validations... if the values are ok the form should submit, if the values are not ok then the form should not submit... however in my case the form is submitting even when the values are incorrect ( i am using the mousedown function ) please see below my code..
<form method="post" name="loginform" action="models/login.php">
<input type="email" class="homepage" name="user_email2" id="user_email2" placeholder="Email" maxlength="50" />
<div class="errormsg" id="errormsg6"></div>
<input type="password" class="homepage" name="user_password2" id="user_password2" placeholder="Password" maxlength="20" />
<div class="errormsg" id="errormsg7"></div>
<input type="submit" name="login" id="login" value="Submit">
<div class="errormsglast" id="errormsg8"></div>
</form>
jquery and ajax
$(document).ready(function()
{
/* ----------------- Login Validations Global Variables ----------------- */
var user_email2 = "";
var user_emailajax2 = "";
var user_password2 = "";
var user_passwordajax2 = "";
var emailformat = new RegExp(/^[+a-zA-Z0-9._-]+#[a-zA-Z0-9.-]+\.[a-zA-Z]{2,4}$/i);
/* ----------------- Define Validate Email */
var validate_email_login = function()
{
var item5 = $("#user_email2").val().toLowerCase();
if (item5.length < 6 || item5.length > 50)
{
$("#errormsg6").html("Email : 6 - 50 Characters");
user_email2 = "";
}
else
{
$("#errormsg6").html("");
user_email2 = item5;
if (!emailformat.test(item5))
{
$("#errormsg6").html("Wrong Email Format");
user_email2 = "";
}
else
{
$("#errormsg6").html("");
user_email2 = item5;
$.ajax(
{
type: 'POST',
url: 'classes/validatelogin.php?f=1',
data: "user_email2=" + item5,
success: function(msg)
{
if (msg == "ok")
{
user_emailajax2 = "";
$("#errormsg6").html("Email Does Not Exist");
}
else if (msg == "exists")
{
user_emailajax2 = item5;
$("#errormsg6").html("");
}
}
});
}
}
}
/* ----------------- Define Validate Password */
var validate_password_login = function()
{
var item5 = $("#user_email2").val().toLowerCase();
var item6 = $("#user_password2").val();
if (item6.length < 8 || item6.length > 20)
{
$("#errormsg7").html("Password : 8-20 Characters");
user_password2 = "";
}
else
{
$("#errormsg7").html("");
user_password2 = item6;
if (user_email2 != "" && user_emailajax2 != "")
{
$.ajax(
{
method: "POST",
url: "classes/validatelogin.php?f=2",
data: "user_email2=" + item5 + "&user_password2=" + item6,
success: function(msg)
{
if (msg == "WrongPw")
{
user_passwordajax2 = "";
$("#errormsg7").html("Wrong Password - See Forgot Password");
}
else if (msg == "CorrectPw")
{
user_passwordajax2 = item6;
$("#errormsg7").html("");
/* window.location.href="manage-properties"; */
}
}
});
}
}
}
/* ----------------- Run Functions */
$("#user_email2").on('focusout', validate_email_login);
$("#user_password2").on('focusout', validate_password_login);
/* ----------------- Stop on Submit */
$( "#login" ).mousedown(function()
{
validate_email_login();
validate_password_login();
if (user_email2 == "" || user_emailajax2 == "" || user_password2 == "" || user_passwordajax2 == "")
{
$("#errormsg8").html("Please Fill All Fields (Correctly)");
console.log("submit false");
return false;
}
else
{
$("#errormsg8").html("");
console.log("submit true");
return true;
}
});
});
Solution Tried - problem is that when user puts the wrong event that is fine, but if user then puts the correct values, the submit returns false on first time, then second time it returns true... it should return true in first go
<input type="button" name="login" id="login" value="Submit">
$( "#login" ).mousedown(function()
{
validate_email_login();
validate_password_login();
if (user_email2 == "" || user_emailajax2 == "" || user_password2 == "" || user_passwordajax2 == "")
{
$("#errormsg8").html("Please Fill All Fields (Correctly)");
console.log("submit false");
return false;
}
else
{
$("#errormsg8").html("");
console.log("submit true");
$('[name=loginform]').submit();
}
});
});

Instead of having a type="submit" button just have a normal button e.g<input type="button" name="login" id="login" value="Submit">. Then when you finished checking the values and happy that it should send then just call:
$('[name=loginform]').submit();
Because what is happening currently is that the form submits when you click on the button, because you are not stopping that event from happening.
If you want to prevent the form from submitting I would suggest either not using that button and initiating the submit yourself like I mentioned above, or alternatively you can use the onsubmit="someFunction()" on the form element way and just return false if it should not submit and return true if it should.

I would say your code suffers from a few issues and some bad practices.
I see you are trying to learn JS so forgive me for not directly solving your issue but to give you some pointers and point you to some best practices.
Logic -
It seems like you are doing a login form. I would say most of this checks should not happen in the client but on the server.
When user signups it might be wise to check user name length on the client as well and prompt the user that he can't use the user name he wants to register with, but during login all the client care is can I login or not.
Security -
You seem to have two serious security issues with your code
You allow to test if an e-mail/user exist or not using 'classes/validatelogin.php?f=1'. in general you should always test the user and password together if they exist and match the user should be able to login, if not the login should fail. you shouldn't notify the user why it fails (if the user name does not exist or if it exist but the password is wrong).
You don't seem to hash passwords in the database. I assume it by limiting the password max length. let the user choose as long password as he wants and hash it using a secure hashing algorithm (I'd suggest bcrypt but google around and find a suitable one). I know you are only learning but this is highly important I think hashing is the first thing you need to learn when handling user logins
Working with the DOM.
You should cache your DOM elements
so instead of calling $('#id') all the time in the main function scope set
var emailInput = $("#user_email2");
function submitForm() {
var email = emailInput.val().toLowerCase();
...
}
You should also probably set the text value of the element and not the html doesn't matter much now but since you are setting text value its good practice and will help you avoid unexpected injections and errors.
Since your using ajax you should not let the form to submit itself even when validation is successful.
Common logic should be packed into functions and reused.
There are many places where your original code can be split into shorter and reusable functions
handle async code better
jQuery supports the Promise API when using ajax requests, I would rather use it. Your original code had a few async calls if you needed to sync between them it would have been painful using plain callbacks (and it is probably what caused you issues in the first place)
Here is a simplified solution using my suggestions -
$(document).ready(function() {
"use strict";
var emailInput = $("#user_email2"),
emailError = $("#errormsg6"),
passwordInput = $("#user_password2"),
passwordError = $("#errormsg7");
function required (value) {
if (value) {
return true;
} else {
return false;
}
//this is just to make the code clear you could use
//`return value ? true : false` or `return !!value`
}
$('form:eq(0)').on('submit', function (e) {
var valid = true,
email = emailInput.val(),
password = passwordInput.val();
e.preventDefault();
if ( !required(email) ) {
emailError.text('Email is required');
valid = false;
}
if ( !required(password) ) {
passwordError.text('Password is required');
valid = false;
}
if ( valid ) {
$.ajax({
method: "POST",
url: "login.php",
data: {
email: email,
password: password
}
}).done(function (data, textStatus, jqXHR) {
//redirect user to main page
}).fail(function (jqXHR, textStatus, errorThrown) {
//show the user the error
})
}
});
});

return false not working in jQuery ajax

I am working on a registration form with jquery ajax. My jQuery Code is as follow :
function validateData()
{
var email = jQuery("#email").val();
var username = jQuery("#username").val();
var emailReg = /^([\w-\.]+#([\w-]+\.)+[\w-]{2,4})?$/;
var regex = new RegExp(/^\+?[0-9(),.-]+$/);
if(!emailReg.test(email))
{
alert('Please enter valid email');
return false;
}
var agreement = jQuery("#agereement").is(":checked");
if(agreement == false)
{
alert("Please agree with the agreement !!! ");
return false;
}
var pass = jQuery("#password").val();
var repass = jQuery("#repeatpass").val();
if(pass != repass)
{
alert("Password & Repeat Password Should be same");
return false;
}
var FirstData = "email=" + email+"&username="+username;
var url = "ajaxcheck.php";
jQuery.ajax({
dataType : 'html',
type: 'GET',
url : url,
data : FirstData,
complete : function() { },
success: function(data)
{
if(data == '')
{
alert("No Problem");
var flag = "true";
}
else{
alert("Username Or Email ID Already Exists");
var flag = "false";
}
}
});
alert(flag);
return flag;
}
</script>
When I submit the form and enters the value of username which is already exists in DB then it alerts the Username Or Email ID Already Exists but submit the form instead of staying on the page. What Should I do if it error comes then it should stay on the page instead of submitting the form

When you write:
var flag = "true";
…
var flag = "false";
…
return flag;
The problem is that "true" and "false" are strings containing the word “true” or “false”. To get the actual boolean values true or false, get rid of the quotes:
var flag = true;
…
var flag = false;
…
return flag;
Event handlers only understand boolean return values, not strings.

Use onsubmit in form tag
<form onsubmit="return validateData();">
....
<input type="submit">
</form>

I'm trying to help you from another angle.
Here is an example on how to do form validation (with bootstrap/php/jquery): http://formvalidation.io/examples/contact-form/
Ajax ".done" happens when you get a successful response from the server and ".fail" happens when sending a request or receiving the response has failed. Assuming you want to check if email exists then you can use something in the lines of:
if(response.IsEmailValid === 'false')
{
$('#alertContainer')
.removeClass('alert-success')
.addClass('alert-warning')
.html('Sorry, email has been taken')
.show()
}

You're setting flag to strings, not boolean values. Try using true and false instead of "true" and "false", both of which are truthy.

using WinJS.xhr to post variables to a URL

Am trying to create a login page for my windows 8 app, am using Html5 and javascript.. so have tried to use winjs.xhr to post what is in the textboxes as variables to a specific url which is a php script so this is my example of the url "http://example.com/api/username=username&password=password" am using winjs.xhr to post these variables to the url but am not getting any response even in the console.log
this is my code
<script>
function handlelogin(){
document.getElementById("box").onsubmit = function(){
if(document.getElementById("email_address").value ==""){
document.getElementById("errormessage").innerHTML= "Please Provide Your Email Address";
return false;
}else{
var email_address = document.getElementById("email_address");
var password = document.getElementById("password");
var formparams = "?username=" + email_address.value + "&password=" + password.value;
document.getElementById("errormessage").innerHTML = "";
WinJS.xhr({type: "POST",
url: "http://example.com/api/",
data: formparams,
headers: { "Content-type": "application/x-www-form-urlencoded" }
}).then(
function (success) {
console.log(success.statusText);
if(success == 1703){
WinJS.Navigation.navigate("home.html");
}
},
function (error) {
console.log(error);
}
);
}
};
}
window.onload = function () {
handlelogin();
}
</script>
<form id="box" method="post" name="loginform">
<p>Email address</p>
<div class="email_address"><input type="text" id="email_address" /></div>
<p>Password</p>
<div class="password"><input type="password" id="password" /></div>
<p><span id="errormessage"></span></p>
<div class="button"><input type="submit" id="login" value="Sign In"/></div>
<p>ForgotPassword?</p>
</form>

First - don't use a submit button. Use a input type="button". No submit required, you are simply reading the values on the page.
Second - attach the event handler for the button's click event. Doing this 'onload' for the window isn't the right place.
Third - don't use 'onsubmit' for your 'box' element. There is no form submission going on here. There shouldn't usually be a form submit in WinJS - that's for a browser posting the page to the server. You already are POSTing your data. See the updated code:
I highly recommend putting ALL javascript into separate files, as you'll get bytecode optimization that way. Inline Javascript isn't optimized for the next load. A common way you could do this is include the onload code below (where I assign onclick) in your js file like so
app.onactivated = function (args) {
..
..
..
args.setPromise(WinJS.UI.processAll().then(function () {
document.getElementById("login").onclick = handlelogin;
}));
..
..
}
};
But the answer directly for your question above is:
<script>
function handlelogin() {
if (document.getElementById("email_address").value == "") {
document.getElementById("errormessage").innerHTML = "Please Provide Your Email Address";
return false;
} else {
var email_address = document.getElementById("email_address");
var password = document.getElementById("password");
var formparams = "?username=" + email_address.value + "&password=" + password.value;
document.getElementById("errormessage").innerHTML = "";
WinJS.xhr({
type: "POST",
url: "http://example.com/api/",
data: formparams,
headers: { "Content-type": "application/x-www-form-urlencoded" }
}).then(
function (success) {
console.log(success.statusText);
if (success == 1703) {
WinJS.Navigation.navigate("home.html");
}
},
function (error) {
console.log(error);
}
);
}
}
window.onload = function() {
document.getElementById("login").onclick = handlelogin;
};
</script>
Check out some of the sessions in App Builder where they discuss JavaScript projects http://aka.ms/stackbuilder