I tried write code for ajax call api from controller. I want ajax get content of link api. I have trouble write code ajax. Please help me write this code with ajax
RestController.java
#Responsebody
#GetMapping("api/hello")
public String hello (){
return "Hello World";
Index.html
<!DOCTYPE html>
<html>
<head>
<meta charset="ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<button type="submit" name ="clickPost"></button>
</body>
</html>
I want when I click button, website return strings Hello World. Please help me write code ajax execute this request, i'm newbie. If my code controller has error, please change it help me. Thanks
Your RestController.java is fine (only missing '}' ). There is actualy no ajax call from your index.html.
It can look somethink like that:
<!DOCTYPE html>
<html>
<head>
<script>
function callAPI() {
var xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function() {
if (this.readyState == 4 && this.status == 200) {
console.log(this.responseText)
}
};
xhttp.open("GET", "/api/hello", true);
xhttp.send();
}
</script>
</head>
<body>
<button onClick="callAPI()">Click me</button>
</body>
</html>
Depending on your particular environment you still might need to update the API URL in javascript or enabling CORS. Check these links
https://web.dev/cross-origin-resource-sharing/
https://spring.io/guides/gs/rest-service-cors/
I found this link describing how to use sweet-alert in laravel.
Step 1
require the package using composer - I successfully downloaded the package
step 2
Usage - Imported the UxWeb\SweetAlert\SweetAlert in my controller.
public function index()
{
$departments = Department::all();
SweetAlert::message('Robots are working!');
return view('department.index')->with('departments', $departments);
}
The problem is when i reload department.index view, sweet-alert does not work!
Could someone help me with this? Either to solve this issue or give a suggestion to any other valid way to use sweet-alert?
Did you add sweet-alert to front-end?
<!DOCTYPE html>
<html lang="en">
<head>
<!-- Include this in your blade layout -->
<script src="https://unpkg.com/sweetalert/dist/sweetalert.min.js"></script>
</head>
<body>
#include('sweet::alert')
</body>
</html>
I don't know how to solve the following: I'd like to let my Model generate real javascript dynamically based on some model logic.
This final piece of javascript code then should be added inside the $(document).ready { } part of my html page.
The thing is: If I use inline="javascript", the code gets quoted as my getter is a String (that is how it is mentioned in the Thymeleaf doc but it's not what I need ;-)
If I use inline="text" in is not quoted but all quotes are escaped instead ;-) - also nice but unusable 8)
If I try inline="none" nothing happens.
Here are the examples
My model getter created the following Javascript code.
PageHelper class
public String documentReady() {
// do some database operations to get the numbers 8,5,3,2
return "PhotoGallery.load(8,5,3,2).loadTheme(name='basic')";
}
So if I now try inline="javascript"
<script th:inline="javascript">
/*<![CDATA[*/
jQuery().ready(function(){
/*[[${pageHelper.documentReady}]]*/
});
/*]]>*/
</script>
it will be rendered to
<script>
/*<![CDATA[*/
jQuery().ready(function(){
'PhotoGallery.load(8,5,3,2).loadTheme(name=\'basic\')'
});
/*]]>*/
</script>
Which doesn't help as it is a String literal, nothing more (this is how Thymeleaf deals with it).
So if I try inline="text" instead
<script>
/*<![CDATA[*/
jQuery().ready(function(){
PhotoGallery.load(8,5,3,2).loadTheme(name='basic')
});
/*]]>*/
</script>
Which escapes the quotes.
inline="none" I do not really understand, as it does nothing
<script>
/*<![CDATA[*/
jQuery().ready(function(){
[[${pageHelper.documentReady}]]
});
/*]]>*/
</script>
To be honest I have no idea how to solve this issue and hopefully anybody out there knows how to deal with this.
Many thanks in advance
Cheers
John
I would change the approach.
Thymeleaf easily allows you to add model variables in your templates to be used in Javascript. In my implementations, I usually put those variables somewhere before the closing header tag; to ensure they're on the page once the JS loads.
I let the template decide what exactly to load, of course. If you're displaying a gallery, then render it as you would and use data attributes to define the gallery that relates to some JS code. Then write yourself a nice jQuery plugin to handle your gallery.
A relatively basic example:
Default Layout Decorator: layout/default.html
<!doctype html>
<html xmlns:layout="http://www.thymeleaf.org" xmlns:th="http://www.thymeleaf.org">
<head>
<title>My Example App</title>
<object th:remove="tag" th:include="fragments/scripts :: header" />
</head>
<body>
<div layout:fragment="content"></div>
<div th:remove="tag" th:replace="fragments/scripts :: footer"></div>
<div th:remove="tag" layout:fragment="footer-scripts"></div>
</body>
</html>
The thing to notice here is the inclusion of the generic footer scripts and then a layout:fragment div defined. This layout div is what we're going to use to include our jQuery plugin needed for the gallery.
File with general scripts: fragments/scripts.html
<div th:fragment="header" xmlns:th="http://www.thymeleaf.org">
<script type="text/javascript" th:inline="javascript">
/*<![CDATA[*/
var MY_APP = {
contextPath: /*[[#{/}]]*/,
defaultTheme: /*[[${theme == null} ? null : ${theme}]]*/,
gallery: {
theme: /*[[${gallery == null} ? null : ${gallery.theme}]]*/,
images: /*[[${gallery == null} ? null : ${gallery.images}]]*/,
names: /*[[${gallery == null} ? null : ${gallery.names}]]*/
}
};
/*]]>*/
</script>
</div>
<div th:fragment="footer" xmlns:th="http://www.thymeleaf.org">
<script type="text/javascript" src="/js/jquery.js"></script>
<script type="text/javascript" src="/js/my_app.js"></script>
</div>
In the scripts file, there are 2 fragments, which are included from the decorator. In the header fragment, a helpful context path is included for the JS layer, as well as a defaultTheme just for the hell of it. A gallery object is then defined and assigned from our model. The footer fragment loads the jQuery library and a main site JS file, again for purposes of this example.
A page with a lazy-loaded gallery: products.html
<html layout:decorator="layout/default" xmlns:layout="http://www.thymeleaf.org/" xmlns:th="http://www.thymeleaf.org">
<head>
<title>Products Landing Page</title>
</head>
<body>
<div layout:fragment="content">
<h1>Products</h1>
<div data-gallery="lazyload"></div>
</div>
<div th:remove="tag" layout:fragment="footer-scripts">
<script type="text/javascript" src="/js/my_gallery.js"></script>
</div>
</body>
</html>
Our products page doesn't have much on it. Using the default decorator, this page overrides the page title in the head. Our content fragment includes a title in an h1 tag and an empty div with a data-gallery attribute. This attribute is what we'll use in our jQuery plugin to initialize the gallery.
The value is set to lazyload, so our plugin knows that we need to find the image IDs in some variable set somewhere. This could have easily been empty if the only thing our plugin supports is a lazyloaded gallery.
So the layout loads some default scripts and with cleverly placed layout:fragments, you allow certain sections of the site to load libraries independent of the rest.
Here's a basic Spring controller example, to work with our app: MyController.java
#Controller
public class MyController {
#RequestMapping("/products")
public String products(Model model) {
class Gallery {
public String theme;
public int[] images;
public String[] names;
public Gallery() {
this.theme = "basic";
this.images = new int[] {8,5,3,2};
this.names = new String[] {"Hey", "\"there's\"", "foo", "bar"};
}
}
model.addAttribute("gallery", new Gallery());
return "products";
}
}
The Gallery class was tossed inline in the products method, to simplify our example here. This could easily be a service or repository of some type that returns an array of identifiers, or whatever you need.
The jQuery plugin that we created, could look something like so: my_gallery.js
(function($) {
var MyGallery = function(element) {
this.$el = $(element);
this.type = this.$el.data('gallery');
if (this.type == 'lazyload') {
this.initLazyLoadedGallery();
}
};
MyGallery.prototype.initLazyLoadedGallery = function() {
// do some gallery loading magic here
// check the variables we loaded in our header
if (MY_APP.gallery.images.length) {
// we have images... sweet! let's fetch them and then do something cool.
PhotoGallery.load(MY_APP.gallery.images).loadTheme({
name: MY_APP.gallery.theme
});
// or if load() requires separate params
var imgs = MY_APP.gallery.images;
PhotoGallery.load(imgs[0],imgs[1],imgs[2],imgs[3]).loadTheme({
name: MY_APP.gallery.theme
});
}
};
// the plugin definition
$.fn.myGallery = function() {
return this.each(function() {
if (!$.data(this, 'myGallery')) {
$.data(this, 'myGallery', new MyGallery(this));
}
});
};
// initialize our gallery on all elements that have that data-gallery attribute
$('[data-gallery]').myGallery();
}(jQuery));
The final rendering of the products page would look like so:
<!doctype html>
<html>
<head>
<title>Products Landing Page</title>
<script type="text/javascript">
/*<![CDATA[*/
var MY_APP = {
contextPath: '/',
defaultTheme: null,
gallery: {
theme: 'basic',
images: [8,5,3,2],
names: ['Hey','\"there\'s\"','foo','bar']
}
};
/*]]>*/
</script>
</head>
<body>
<div>
<h1>Products</h1>
<div data-gallery="lazyload"></div>
</div>
<script type="text/javascript" src="/js/jquery.js"></script>
<script type="text/javascript" src="/js/my_app.js"></script>
<script type="text/javascript" src="/js/my_gallery.js"></script>
</body>
</html>
As you can see, Thymeleaf does a pretty good job of translating your model to valid JS and actually adds the quotes where needed and escapes them as well. Once the page finishes rendering, with the jQuery plugin at the end of the file, everything needed to initialize the gallery should be loaded and ready to go.
This is not a perfect example, but I think it's a pretty straight-forward design pattern for a web app.
instead of ${pageHelper.documentReady} use ${pageHelper.documentReady}
I'm having problems with iron-ajax and data binding in Polymer 1.0.2. Not even a slightly changed example from the Polymer documentation is working.
Here is the code with my changes:
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<script src="../../../bower_components/webcomponentsjs/webcomponents-lite.js"></script>
<link rel="import" href="../../../bower_components/polymer/polymer.html">
<link rel="import" href="../../../bower_components/iron-ajax/iron-ajax.html">
</head>
<body>
<template is="dom-bind">
<iron-ajax
auto
url="http://jsonplaceholder.typicode.com/posts/"
lastResponse="{{data}}"
handleAs="json">
</iron-ajax>
<template is="dom-repeat" items="{{data}}">
<div><span>{{item.id}}</span></div>
</template>
</template>
<script>
(function (document) {
'use strict';
var app = document.querySelector('#app');
window.addEventListener('WebComponentsReady', function() {
var ironAjax = document.querySelector('iron-ajax');
ironAjax.addEventListener('response', function() {
console.log(ironAjax.lastResponse[0].id);
});
ironAjax.generateRequest();
});
})(document);
</script>
</body>
</html>
All I changed was entering a URL to get a real JSON response and setting the auto and handleAs properties. I also added a small script with a listener for the response event. The listener is working fine and handles the response, but the spans in the dom-repeat template aren't rendered.
I'm using Polymer 1.0.2 and iron-elements 1.0.0
It seems the documentation you is missing a - character in the lastresponse attribute of the example.
You must change lastResponse to last-response.
Look at this example from the iron-ajax github page.
when you use a attribute on a element, you have to convert the camelcase sentence to dashes sentence, I mean:
lastResponse is maps to last-response
Property name to attribute name mapping
I'm just starting to use Parse Core (as Google'e ScriptDB is being decommissioned soon) and am having some trouble.
So I'm able to get Parse Core db to read/write using just a standard HTML page as shown below:
<!doctype html>
<head>
<meta charset="utf-8">
<title>My Parse App</title>
<meta name="description" content="My Parse App">
<meta name="viewport" content="width=device-width">
<link rel="stylesheet" href="css/reset.css">
<link rel="stylesheet" href="css/styles.css">
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>
<script type="text/javascript" src="http://www.parsecdn.com/js/parse-1.2.18.min.js"></script>
</head>
<body>
<div id="main">
<h1>You're ready to use Parse!</h1>
<p>Read the documentation and start building your JavaScript app:</p>
<ul>
<li>Parse JavaScript Guide</li>
<li>Parse JavaScript API Documentation</li>
</ul>
<div style="display:none" class="error">
Looks like there was a problem saving the test object. Make sure you've set your application ID and javascript key correctly in the call to <code>Parse.initialize</code> in this file.
</div>
<div style="display:none" class="success">
<p>We've also just created your first object using the following code:</p>
<code>
var TestObject = Parse.Object.extend("TestObject");<br/>
var testObject = new TestObject();<br/>
testObject.save({foo: "bar"});
</code>
</div>
</div>
<script type="text/javascript">
Parse.initialize("PyMFUxyBxR8IDgndjZ378CeEXH2c6WLK1wK2JHYX", "IgiMfiuy3LFjzH0ehmyf5Rkti8AmVtwcGqc6nttN");
var TestObject = Parse.Object.extend("TestObject");
var testObject = new TestObject();
testObject.save({foo: "bar"}, {
success: function(object) {
$(".success").show();
},
error: function(model, error) {
$(".error").show();
}
});
</script>
</body>
</html>
However, when I try to serve that up using the HtmlService shown below, I get no response from Parse. Parse Core.html basically has all of the code I have above ( only thing I changed was to remove the css calls).
function doGet() {
var htmlPage = HtmlService.createTemplateFromFile('Parse Core.html')
.evaluate()
.setSandboxMode(HtmlService.SandboxMode.NATIVE)
.setTitle('Parse Core Test');
return htmlPage;
}
Link to ParseDb Library for Apps Script
Here is the key to add the library: MxhsVzdWH6ZQMWWeAA9tObPxhMjh3Sh48
Install that library and it allows you to use most of the same methods that were used by ScriptDb. As far as saving and querying go they almost identical. Make sure to read the Library's notes, how to add the applicationId and restApiKey. It is a little different that you can silo data by classes which must be defined in the call to Parse.
Bruce here is leading the way on database connection for Apps Script, he has plenty of documentation on using Parse.com, and also his own DbConncection Drive that would allow you to use a number of back-end systems.
Excel Liberation - Bruce's Site.