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+<!DOCTYPE html>
+<html lang="en">
+<head>
+ <meta charset="utf-8">
+ <title>Example: Request XML data from Yahoo! Weather</title>
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+ <h1><img src="http://yuilibrary.com/img/yui-logo.png"></h1>
+ </div>
+
+
+ <h1>Example: Request XML data from Yahoo! Weather</h1>
+ <div class="yui3-g">
+ <div class="yui3-u-3-4">
+ <div id="main">
+ <div class="content"><style type="text/css" scoped>
+#weatherModule li {margin-left:2em;}
+#weatherModule { background-color:#FFFFFF; border:1px dotted #666666; padding:1em; margin-bottom:1em;}
+</style>
+
+<div class="intro">
+<p>This example demonstrates how to use IO to make a cross-domain request to <code>http://weather.yahooapis.com/forecastrss</code>. To try out the example, fill in your five-digit US zip code, or Location ID.</p>
+<p><strong>Please note:</strong> This example will not function on iOS devices due to the usage of Flash as the cross-domain transport. This example may not work on older Android devices, as well.</p>
+</div>
+<div class="example">
+<form id="wForm">
+<fieldset>
+ <label>Zip Code or Location ID</label> <input type="text" id="zip" value="94089">
+ <p>Please enter a U.S. Zip Code or a Location ID to get the current temperature. The default is Zip Code 94089 for Sunnyvale, California; its location ID is: USCA1116.</p>
+</fieldset>
+<div id="weatherModule">
+ <li>Weather RSS data will appear here.</li>
+</div>
+<input type="button" value="Get Weather RSS" id="getWeather" disabled="disabled">
+</form>
+
+
+<script language="javascript">
+
+YUI({ filter:'raw' }).use("io-xdr", "node",
+
+ function(Y) {
+
+ //Get a Node reference to the div we'll use for displaying
+ //results:
+ var div = Y.one('#weatherModule');
+
+ //Configure the cross-domain transport:
+ var xdrConfig = {
+ id:'flash', //We'll reference this id in the xdr configuration of our transaction.
+ src:'../../build/io-xdr/io.swf' //Relative path to the .swf file from the current page.
+ };
+ Y.io.transport(xdrConfig);
+
+ //Define a function to handle a successful response from
+ //Yahoo! Weather. The success handler will find the response
+ //object in its second argument:
+ function successHandler(id, o){
+ Y.log("Success handler called; handler will parse the retrieved XML and insert into DOM.", "info", "example");
+ var root = o.responseXML.documentElement;
+ var oTitle = root.getElementsByTagName('description')[0].firstChild.nodeValue;
+ var oDateTime = root.getElementsByTagName('lastBuildDate')[0].firstChild.nodeValue;
+ var descriptionNode = root.getElementsByTagName('description')[1].firstChild.nodeValue;
+
+ div.set("innerHTML", "<p>" + oTitle + "</p>" + "<p>" + oDateTime + "</p>" + descriptionNode);
+
+ Y.log("Success handler is complete.", "info", "example");
+ }
+
+ //Provide a function that can help debug failed
+ //requests:
+ function failureHandler(id, o){
+ Y.log("Failure handler called; http status: " + o.status, "info", "example");
+ div.set("innerHTML", o.status + " " + o.statusText);
+ }
+
+ //When the Get RSS button is clicked, this function will fire
+ //and compose/dispatch the IO request:
+ function getModule(){
+ //Get the input value:
+ var iZip = Y.one('#zip').get("value");
+
+ //Create a querystring from the input value:
+ var queryString = encodeURI('?p=' + iZip);
+
+ //The Yahoo! Weather feed.
+ var entryPoint = 'http://weather.yahooapis.com/forecastrss';
+
+ //Compile the full URI for the request:
+ var sUrl = entryPoint + queryString;
+
+ Y.log("Submitting request; zip code: " + iZip, "info", "example");
+
+ //Make the request:
+ var request = Y.io(sUrl, {
+ method:"GET",
+ xdr: {
+ use:'flash', //This is the xdrConfig id we referenced above.
+ dataType:'xml' //Indicate the data are XML, not string.
+ },
+ on:
+ {
+ success:successHandler,
+ failure:failureHandler
+ }
+ }
+ );
+ }
+
+ //Add the click handler to the Get Weather RSS button as soon
+ //as the Flash transport has loaded:
+ Y.on('io:xdrReady', function() {
+ var btn = Y.one("#getWeather");
+ btn.set("disabled", false);
+ //Use the Event Utility to wire the Get RSS button
+ //to the getModule function.
+ Y.on("click", getModule, "#getWeather");
+ });
+
+ Y.log("When you retrieve weather RSS data, relevant steps in the process will be reported here in the logger/console.", "info", "example");
+ }
+);
+</script>
+
+</div>
+
+<h3 class="first">Exploring the Code for This Example</h3>
+<p>Create a YUI instance, using IO, for this example:</p>
+
+<pre class="code prettyprint">//Create a YUI instance including support for cross-domain IO:
+YUI().use("io-xdr", "node", function(Y) {
+ // Y is the YUI instance.
+ // The rest of the following code is encapsulated in this
+ // anonymous function.
+} );
+
+//Configure the cross-domain transport:
+var xdrConfig = {
+ id:'flash', //We'll reference this id in the xdr configuration of our transaction.
+ src:'../../build/io-xdr/io.swf' //Relative path to the .swf file from the current page.
+};
+Y.io.transport(xdrConfig);</pre>
+
+
+<h4>Callback Object and the Weather RSS</h4>
+<p><a href="http://developer.yahoo.com/weather/">Yahoo! Weather RSS</a> will return an XML document if the transaction is successful. The following <code>success</code> callback handlers is used to process the response.</p>
+
+<pre class="code prettyprint">//Define a function to handle a successful response from
+//Yahoo! Weather. The success handler will find the response
+//object in its second argument:
+function successHandler(id, o){
+ Y.log("Success handler called; handler will parse the retrieved XML and insert into DOM.", "info", "example");
+ var root = o.responseXML.documentElement;
+ var oTitle = root.getElementsByTagName('description')[0].firstChild.nodeValue;
+ var oDateTime = root.getElementsByTagName('lastBuildDate')[0].firstChild.nodeValue;
+ var descriptionNode = root.getElementsByTagName('description')[1].firstChild.nodeValue;
+
+ div.set("innerHTML", "<p>" + oTitle + "</p>" + "<p>" + oDateTime + "</p>" + descriptionNode);
+
+ Y.log("Success handler is complete.", "info", "example");
+}</pre>
+
+
+<h4>Assemble the Querystring and Initiate the Transaction</h4>
+<p>The Yahoo! Weather RSS feed requires a simple HTTP GET request with a base URL and a querystring containing the required information as a name-value pair. In this example, we will use the following parameter:</p>
+<ul>
+ <li><strong>p</strong> — location as U.S. Zip Code or Location ID</li>
+</ul>
+
+<p>The following are some example Location IDs (do not include the city name):</p>
+<ul>
+ <li><strong>Beijing</strong>: <em>CHXX0008</em></li>
+ <li><strong>Helsinki</strong>: <em>FIXX0002</em></li>
+ <li><strong>London</strong>: <em>UKXX0085</em></li>
+ <li><strong>Moscow</strong>: <em>RSXX0063</em></li>
+ <li><strong>Munich</strong>: <em>GMXX0087</em></li>
+ <li><strong>Paris</strong>: <em>FRXX0076</em></li>
+ <li><strong>Riyadh</strong>: <em>SAXX0017</em></li>
+ <li><strong>Tokyo</strong>: <em>JAXX0085</em></li>
+</ul>
+<p>For more details on the Yahoo! Weather RSS feed and other location IDs, please visit <a href="http://developer.yahoo.com/weather/index.html">http://developer.yahoo.com/weather/index.html</a>.
+<p>Function <code>getModule</code> retrieves the input values for location and creates a querystring:</p>
+
+<pre class="code prettyprint">//When the Get RSS button is clicked, this function will fire
+//and compose/dispatch the IO request:
+function getModule(){
+ //Get the input value:
+ var iZip = Y.one('#zip').get("value");
+
+ //Create a querystring from the input value:
+ var queryString = encodeURI('?p=' + iZip);
+
+ //The Yahoo! Weather feed.
+ var entryPoint = 'http://weather.yahooapis.com/forecastrss';
+
+ //Compile the full URI for the request:
+ var sUrl = entryPoint + queryString;
+
+ Y.log("Submitting request; zip code: " + iZip, "info", "example");
+
+ //Make the reqeust:
+ var request = Y.io(sUrl, {
+ method:"GET",
+ on:
+ {
+ success:successHandler,
+ failure:failureHandler
+ }
+ }
+ );
+}
+
+
+//Add the click handler to the Get Weather RSS button as soon
+//as the Flash transport has loaded, indicated by the firing
+//of event "io:xdrReady".
+Y.on('io:xdrReady', function() {
+ var btn = Y.one("#getWeather");
+ btn.set("disabled", false);
+ //Use the Event Utility to wire the Get RSS button
+ //to the getModule function.
+ Y.on("click", getModule, "#getWeather");
+});</pre>
+
+
+<h4>Full Script Source</h4>
+
+<p>Here is the full JavaScript source for this example:</p>
+
+<pre class="code prettyprint"><form id="wForm">
+<fieldset>
+ <label>Zip Code or Location ID</label> <input type="text" id="zip" value="94089">
+ <p>Please enter a U.S. Zip Code or a Location ID to get the current temperature. The default is Zip Code 94089 for Sunnyvale, California; its location ID is: USCA1116.</p>
+</fieldset>
+<div id="weatherModule">
+ <li>Weather RSS data will appear here.</li>
+</div>
+<input type="button" value="Get Weather RSS" id="getWeather" disabled="disabled">
+</form>
+
+
+<script language="javascript">
+
+YUI({ filter:'raw' }).use("io-xdr", "node",
+
+ function(Y) {
+
+ //Get a Node reference to the div we'll use for displaying
+ //results:
+ var div = Y.one('#weatherModule');
+
+ //Configure the cross-domain transport:
+ var xdrConfig = {
+ id:'flash', //We'll reference this id in the xdr configuration of our transaction.
+ src:'../../build/io-xdr/io.swf' //Relative path to the .swf file from the current page.
+ };
+ Y.io.transport(xdrConfig);
+
+ //Define a function to handle a successful response from
+ //Yahoo! Weather. The success handler will find the response
+ //object in its second argument:
+ function successHandler(id, o){
+ Y.log("Success handler called; handler will parse the retrieved XML and insert into DOM.", "info", "example");
+ var root = o.responseXML.documentElement;
+ var oTitle = root.getElementsByTagName('description')[0].firstChild.nodeValue;
+ var oDateTime = root.getElementsByTagName('lastBuildDate')[0].firstChild.nodeValue;
+ var descriptionNode = root.getElementsByTagName('description')[1].firstChild.nodeValue;
+
+ div.set("innerHTML", "<p>" + oTitle + "</p>" + "<p>" + oDateTime + "</p>" + descriptionNode);
+
+ Y.log("Success handler is complete.", "info", "example");
+ }
+
+ //Provide a function that can help debug failed
+ //requests:
+ function failureHandler(id, o){
+ Y.log("Failure handler called; http status: " + o.status, "info", "example");
+ div.set("innerHTML", o.status + " " + o.statusText);
+ }
+
+ //When the Get RSS button is clicked, this function will fire
+ //and compose/dispatch the IO request:
+ function getModule(){
+ //Get the input value:
+ var iZip = Y.one('#zip').get("value");
+
+ //Create a querystring from the input value:
+ var queryString = encodeURI('?p=' + iZip);
+
+ //The Yahoo! Weather feed.
+ var entryPoint = 'http://weather.yahooapis.com/forecastrss';
+
+ //Compile the full URI for the request:
+ var sUrl = entryPoint + queryString;
+
+ Y.log("Submitting request; zip code: " + iZip, "info", "example");
+
+ //Make the request:
+ var request = Y.io(sUrl, {
+ method:"GET",
+ xdr: {
+ use:'flash', //This is the xdrConfig id we referenced above.
+ dataType:'xml' //Indicate the data are XML, not string.
+ },
+ on:
+ {
+ success:successHandler,
+ failure:failureHandler
+ }
+ }
+ );
+ }
+
+ //Add the click handler to the Get Weather RSS button as soon
+ //as the Flash transport has loaded:
+ Y.on('io:xdrReady', function() {
+ var btn = Y.one("#getWeather");
+ btn.set("disabled", false);
+ //Use the Event Utility to wire the Get RSS button
+ //to the getModule function.
+ Y.on("click", getModule, "#getWeather");
+ });
+
+ Y.log("When you retrieve weather RSS data, relevant steps in the process will be reported here in the logger/console.", "info", "example");
+ }
+);
+</script></pre>
+
+</div>
+ </div>
+ </div>
+
+ <div class="yui3-u-1-4">
+ <div class="sidebar">
+
+
+
+ <div class="sidebox">
+ <div class="hd">
+ <h2 class="no-toc">Examples</h2>
+ </div>
+
+ <div class="bd">
+ <ul class="examples">
+
+
+ <li data-description="Use IO to request data over HTTP.">
+ <a href="get.html">HTTP GET to request data</a>
+ </li>
+
+
+
+ <li data-description="Use IO to request XML data from a remote web service.">
+ <a href="weather.html">Request XML data from Yahoo! Weather</a>
+ </li>
+
+
+
+ <li data-description="Use IO to make a cross-domain request to Yahoo! Pipes, returning data from disparate sources.">
+ <a href="xdr.html">Request JSON using Yahoo! Pipes</a>
+ </li>
+
+
+
+
+ </ul>
+ </div>
+ </div>
+
+
+
+ <div class="sidebox">
+ <div class="hd">
+ <h2 class="no-toc">Examples That Use This Component</h2>
+ </div>
+
+ <div class="bd">
+ <ul class="examples">
+
+
+
+
+
+
+
+
+ <li data-description="Shows how to create a simple plugin to retrieve content for the Overlay using the io utility.">
+ <a href="../overlay/overlay-io-plugin.html">IO Plugin</a>
+ </li>
+
+
+ </ul>
+ </div>
+ </div>
+
+ </div>
+ </div>
+ </div>
+</div>
+
+<script src="../assets/vendor/prettify/prettify-min.js"></script>
+<script>prettyPrint();</script>
+
+<script>
+YUI.Env.Tests = {
+ examples: [],
+ project: '../assets',
+ assets: '../assets/io',
+ name: 'weather',
+ title: 'Request XML data from Yahoo! Weather',
+ newWindow: '',
+ auto: false
+};
+YUI.Env.Tests.examples.push('get');
+YUI.Env.Tests.examples.push('weather');
+YUI.Env.Tests.examples.push('xdr');
+YUI.Env.Tests.examples.push('overlay-io-plugin');
+
+</script>
+<script src="../assets/yui/test-runner.js"></script>
+
+
+
+</body>
+</html>