Connection Manager GET Transaction

To construct a GET transaction using the Connection Manager, you will need to construct a querystring of key-value pairs and append it to the URL. The following code example provides a step-by-step approach to creating a simple GET transaction.

Source file and dependencies

Load the YAHOO namespace and connection manager source file:

<script src="yahoo.js"></script>
<script src="connection.js"></script>

Assemble the Querystring

Construct a querystring with two key-value pairs of username = anonymous and userid = 0:

  /*
   *
   * Create a querystring with example key-value pairs of
   * username and userid.  Remember to encode the querystring
   * if and when the string contains special characters.
   *
   */
  var sUrl = "php/get.php?username=anonymous&userid=0";

The Callback Object

Create a callback object to handle the response, and pass an object literal to both success and failure as the argument.

var handleSuccess = function(o){

	function parseHeaders(){
		var allHeaders = headerStr.split("\n");
		var headers;
		for(var i=0; i < headers.length; i++){
			var delimitPos = header[i].indexOf(':');
			if(delimitPos != -1){
				headers[i] = "<p>" +
				headers[i].substring(0,delimitPos) + ":"+
				headers[i].substring(delimitPos+1) + "</p>";
			}
		return headers;
	}

	if(o.responseText !== undefined){
		div.innerHTML = "Transaction id: " + o.tId;
		div.innerHTML += "HTTP status: " + o.status;
		div.innerHTML += "Status code message: " + o.statusText;
		div.innerHTML += "HTTP headers: " + parseHeaders();
		div.innerHTML += "Server response: " + o.responseText;
		div.innerHTML += "Argument object: property foo = " + o.argument.foo +
						 "and property bar = " + o.argument.bar;
	}
}

var callback =
{
  success:handleSuccess,
  failure: handleFailure
  argument: { foo:"foo", bar:"bar" }
};

Initiate the GET Transaction

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

Note: Caching and GET idempotency.

var request = YAHOO.util.Connect.asyncRequest('GET', sUrl, callback);