YUI Library Examples: Connection Manager: Connection Manager POST Transaction

Using Connection Manager to Post Data and Receive the Server Response via HTTP POST

Source file and dependencies

Load the Yahoo Global Object and Connection Manager source files:


1	<script src="yahoo.js"></script>
2	<script src="event.js"></script>
3	<script src="connection.js"></script>
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Assemble the POST message

Construct an example of key-value string of username = anonymous and userid = 0:


1	/*
2	* Remember to encode the key-value string if and when
3	* the string contains special characters.
4	*/
5	var postData = "username=anonymous&userid=0";
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The Callback Object

Create a callback object to handle the response and pass an array of values to success and failure as the argument.


1	var handleSuccess = function(o){
2
3	if(o.responseText !== undefined){
4	div.innerHTML = "Transaction id: " + o.tId;
5	div.innerHTML += "HTTP status: " + o.status;
6	div.innerHTML += "Status code message: " + o.statusText;
7	div.innerHTML += "<li>HTTP headers: <ul>" + o.getAllResponseHeaders + "</ul></li>";
8	div.innerHTML += "PHP response: " + o.responseText;
9	div.innerHTML += "Argument object: " + o.argument;
10	}
11	}
12
13	var callback =
14	{
15	success:handleSuccess,
16	failure: handleFailure,
17	argument: ['foo','bar']
18	};
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Initiate the POST Transaction

Call YAHOO.util.Connect.asyncRequest to send the request to post.php, and the PHP script will return the a readable output of $_POST via print_r(). The handleSuccess callback will print the response object's properties, including the server response data.


1	var request = YAHOO.util.Connect.asyncRequest('POST', sUrl, callback, postData);
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Configuration for This Example

You can load the necessary JavaScript and CSS for this example from Yahoo's servers. Click here to load the YUI Dependency Configurator with all of this example's dependencies preconfigured.

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