Sending form data using JQuery and parsing the returned JSON data
Question
This may be a relatively simple task, but I don't know why I've been struggling with it for the past 3 days.
I have to create a login form that sends the email and password to a php file. The php file validates the user and returns JSON data. The JSON returned if the login is successful:
enter{"error":0,"message":"User successfully logged in!","api_key":"eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJpc3MiOiJzdHJlZXRlYXRfdXNlcmhhbmRsZXIiLCJleHAiOjE0NDA0Mjg5NDEsImlhdCI6MTQzOTUyODk0MX0.OcDRN4tiQrZPJnpA3Iw2tF4kogYxX-DuDhFqd8vqQts"}
If login isn't successful:
enter{"error":1,"message":"User doesn't exist!"}
The form needs to redirect the user to another html page if the login is successful. I have tried almost every jQuery method ($.post, $.ajax) to send the form data and receive the JSON data but have been unsuccessful so far. The code I tried:
HTML:
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="http://code.jquery.com/mobile/1.4.5/jquery.mobile-1.4.5.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
<script src="img.js"></script>
</head>
<body>
<div data-role="page">
<div data-role="header" class="ui-content">Login</div>
<div data-role="content" class="ui-content">
<form method="post" action="#" id="loginform">
<div class="ui-field-contain">
<br>
<div>
<label for="email">Email:</label>
<input type="email" name="email" id="email" data-clear-btn="true">
</div>
<div>
<label for="password">Password:</label>
<input type="password" name="password" id="password" data-clear-btn="true">
</div>
<input type="button" value="Login" id="login">
</div>
</form>
</div>
JavaScript code:
$(document).ready(function(){
$("#login").click(function(){
var email = $("#email").val();
var password = $("#password").val();
// Checking for blank fields.
if (email =='' || password =='') {
alert("Please fill all fields...!!!!!!");
}
else {
$.post("http://streetdict.esy.es/v1/login",{ email: email, password:password},
function(data) {
var json_response=data;
alert(json_response);
});
}
});
});
This code basically should just show the JSON response as an alert right? Except that it just doesn't show anything. What I need to do is if the login is successful, it should redirect to another page called untitled.html using ajax, asynchronously. Someone please help me!
3 answers
solution1
1 ACCPTED 2015-08-14 05:37:22
use below code to send post request and then check for response
$(document).ready(function(){
$("#login").click(function(){
var email = $("#email").val();
var password = $("#password").val();
// Checking for blank fields.
if( email =='' || password ==''){
alert("Please fill all fields...!!!!!!");
}
else {
$.ajax({
url:'http://streetdict.esy.es/v1/login',
type:'POST',
data:{ email: email, password:password},
success:function(data){
if(data['error'] == '0'){
window.location.href = 'untitled.html';
}
},
error:function(e){
alert("error in request");
},
});
}
});
});
solution2
1 2015-08-14 07:00:05
$(document).ready(function(){
$("#login").click(function(){
var email = $("#email").val();
var password = $("#password").val();
// Checking for blank fields.
if (email =='' || password =='') {
alert("Please fill all fields...!!!!!!");
}
else {
$.getJSON("http://streetdict.esy.es/v1/login",{ email: email, password:password}).done(function(data) {
$.each(data, function(key, value) {
//you can do your logic here
});
}
});
});
solution3
0 2015-08-14 05:52:25
您可以检查响应的字符串是否为json。
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