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* Douglas Crockford's JSON parsing and stringifying methods: In the JSON Utility, Douglas Crockford's JSON parsing and stringifying methods are adapted from work published at JSON.org. The adapted work is in the public domain.
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<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<title>JSON with Connection Manager</title>
<style type="text/css">
/*margin and padding on body element
can introduce errors in determining
element position and are not recommended;
we turn them off as a foundation for YUI
CSS treatments. */
body {
margin:0;
padding:0;
}
</style>
<link rel="stylesheet" type="text/css" href="yui_2.7.0b-lib/fonts/fonts-min.css" />
<script type="text/javascript" src="yui_2.7.0b-lib/yahoo-dom-event/yahoo-dom-event.js"></script>
<script type="text/javascript" src="yui_2.7.0b-lib/json/json-min.js"></script>
<script type="text/javascript" src="yui_2.7.0b-lib/connection/connection-min.js"></script>
<!--begin custom header content for this example-->
<!--end custom header content for this example-->
</head>
<body class=" yui-skin-sam">
<h1>JSON with Connection Manager</h1>
<div class="exampleIntro">
<p>A natural fit for the JSON Utility is working with the <a href="http://developer.yahoo.com/yui/connection/">Connection Manager</a>. In this example, we'll request JSON data from the server using Connection Manager's <code>asyncRequest</code> and parse the resulting JSON string data for processing.</p>
<p>Click the Get Messages button to send the request to the server.</p>
</div>
<!--BEGIN SOURCE CODE FOR EXAMPLE -->
<div id="demo">
<input type="button" id="demo_btn" value="Get Messages">
<div id="demo_msg"></div>
</div>
<script type="text/javascript">
YAHOO.util.Event.on('demo_btn','click',function (e) {
// Get the div element in which to report messages from the server
var msg_section = YAHOO.util.Dom.get('demo_msg');
msg_section.innerHTML = '';
// Define the callbacks for the asyncRequest
var callbacks = {
success : function (o) {
YAHOO.log("RAW JSON DATA: " + o.responseText);
// Process the JSON data returned from the server
var messages = [];
try {
messages = YAHOO.lang.JSON.parse(o.responseText);
}
catch (x) {
alert("JSON Parse failed!");
return;
}
YAHOO.log("PARSED DATA: " + YAHOO.lang.dump(messages));
// The returned data was parsed into an array of objects.
// Add a P element for each received message
for (var i = 0, len = messages.length; i < len; ++i) {
var m = messages[i];
var p = document.createElement('p');
var message_text = document.createTextNode(
m.animal + ' says "' + m.message + '"');
p.appendChild(message_text);
msg_section.appendChild(p);
}
},
failure : function (o) {
if (!YAHOO.util.Connect.isCallInProgress(o)) {
alert("Async call failed!");
}
},
timeout : 3000
}
// Make the call to the server for JSON data
YAHOO.util.Connect.asyncRequest('GET',"yui_2.7.0b-assets/json-assets/jsonConnect.php", callbacks);
});
</script>
<!--END SOURCE CODE FOR EXAMPLE -->
</body>
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yui_2.7.0b.zip( 4,431 k)