205 lines
No EOL
7.7 KiB
HTML
205 lines
No EOL
7.7 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
|
|
<html>
|
|
<head>
|
|
<meta http-equiv="content-type" content="text/html; charset=utf-8">
|
|
<title>Getting a Script Node with JSON Data</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="../../build/fonts/fonts-min.css" />
|
|
<link rel="stylesheet" type="text/css" href="../../build/button/assets/skins/sam/button.css" />
|
|
<script type="text/javascript" src="../../build/yahoo-dom-event/yahoo-dom-event.js"></script>
|
|
<script type="text/javascript" src="../../build/element/element-beta.js"></script>
|
|
<script type="text/javascript" src="../../build/button/button.js"></script>
|
|
<script type="text/javascript" src="../../build/get/get.js"></script>
|
|
|
|
|
|
<!--begin custom header content for this example-->
|
|
<style type="text/css">
|
|
#container ol {
|
|
/*bringing lists on to the page with breathing room */
|
|
margin-left:2em !important;
|
|
}
|
|
|
|
#container ol li {
|
|
/*giving OL's LIs generated numbers*/
|
|
list-style: decimal outside !important;
|
|
}
|
|
|
|
#container h3 {
|
|
margin-top: 1em;
|
|
}
|
|
</style>
|
|
<!--end custom header content for this example-->
|
|
|
|
</head>
|
|
|
|
<body class=" yui-skin-sam">
|
|
|
|
<h1>Getting a Script Node with JSON Data</h1>
|
|
|
|
<div class="exampleIntro">
|
|
<p>This example employs the <a href="http://developer.yahoo.com/yui/get/">YUI Get Utility</a> in a simple use case: retrieving JSON data from a cross-domain web service. While this is a relatively common usage, it's important to understand the security ramifications of this technique. Scripts loaded via the Get Utility (or any other "script node" solution) execute immediately once they are loaded. If you do not fully control (or fully trust) the script's source, this is not a safe technique and it can put the security of your users' data at risk. (For more information on the dangers of cross-site scripting [XSS] exploits, <a href="http://en.wikipedia.org/wiki/Cross-site_scripting">check out the Wikipedia entry on this subject</a>.)</p>
|
|
<p>Here, we will use a trusted Yahoo! Search web service called <a href="http://developer.yahoo.com/search/siteexplorer/V1/inlinkData.html">Site Explorer</a> to return a list of inbound links for a given URL. The principal difference between this example and similar examples using <a href="http://developer.yahoo.com/yui/connection/">YUI Connection Manager</a> is that this technique does not require a server-side proxy. The browser connects directly to the third-party web service without bouncing through a proxy page as is required when using the XMLHttpRequest object (on which Connection Manager relies).</p>
|
|
|
|
</div>
|
|
|
|
<!--BEGIN SOURCE CODE FOR EXAMPLE =============================== -->
|
|
|
|
<div id="container">
|
|
|
|
<!--Use a real form that works without JavaScript:-->
|
|
<form method="GET" action="http://siteexplorer.search.yahoo.com/advsearch" id="siteExplorer">
|
|
|
|
<label for="p">Site URL:</label> <input type="text" name="p" id="p" value="http://developer.yahoo.com/yui" size="40">
|
|
|
|
<input type="hidden" name="bwm" value="i">
|
|
<input type="hidden" name="bwms" value="p">
|
|
|
|
<input type="submit" id="getSiteExplorerData" value="Click here to get JSON data.">
|
|
|
|
</form>
|
|
|
|
<div id="results">
|
|
<!--JSON output will be written to the DOM here-->
|
|
|
|
</div>
|
|
</div>
|
|
|
|
<script type="text/javascript">
|
|
//create a namespace for this example:
|
|
YAHOO.namespace("example.SiteExplorer");
|
|
|
|
//This example uses the "Module Pattern"; a full explanation of
|
|
//this pattern can be found on yuiblog:
|
|
// http://yuiblog.com/blog/2007/06/12/module-pattern
|
|
YAHOO.example.SiteExplorer = function() {
|
|
|
|
//set up some shortcuts in case our typing fingers
|
|
//get lazy:
|
|
var Event = YAHOO.util.Event,
|
|
Dom = YAHOO.util.Dom,
|
|
JSON = YAHOO.lang.JSON,
|
|
Button = YAHOO.widget.Button,
|
|
Get = YAHOO.util.Get,
|
|
elResults = Dom.get("results");
|
|
|
|
//we won't use the Get Utility's success handler in this example
|
|
//because the web service we're using has a built-in callback
|
|
//mechanism. But we'll stub it out here and use it to simply
|
|
//log a message to the logger:
|
|
var onSiteExplorerSuccess = function() {
|
|
YAHOO.log("The Get Utility has fired the success handler indicating that the requested script has loaded and is ready for use.", "info", "example");
|
|
}
|
|
|
|
//function to retrieve data from Yahoo! Site Explorer web service --
|
|
// http://developer.yahoo.com/search/siteexplorer/V1/inlinkData.html
|
|
var getSiteExplorerData = function() {
|
|
YAHOO.log("Button clicked; getSiteExplorerData firing.", "info", "example");
|
|
|
|
//Load the transitional state of the results section:
|
|
elResults.innerHTML = "<h3>Retrieving incoming links for " +
|
|
Dom.get("p").value + ":</h3>" +
|
|
"<img src='http://l.yimg.com/us.yimg.com/i/nt/ic/ut/bsc/busybar_1.gif' " +
|
|
"alt='Please wait...'>";
|
|
|
|
//prepare the URL for the Yahoo Site Explorer API:
|
|
var sURL = "http://search.yahooapis.com/SiteExplorerService/V1/inlinkData?" +
|
|
"appid=3wEDxLHV34HvAU2lMnI51S4Qra5m.baugqoSv4gcRllqqVZm3UrMDZWToMivf5BJ3Mom" +
|
|
"&results=20&output=json&omit_inlinks=domain" +
|
|
"&callback=YAHOO.example.SiteExplorer.callback" +
|
|
"&query=" + encodeURIComponent(Dom.get("p").value);
|
|
|
|
//This simple line is the call to the Get Utility; we pass
|
|
//in the URL and the configuration object, which in this case
|
|
//consists merely of our success and failure callbacks:
|
|
var transactionObj = Get.script(sURL, {
|
|
onSuccess: onSiteExplorerSuccess,
|
|
scope : this
|
|
});
|
|
|
|
//The script method returns a single-field object containing the
|
|
//tranaction id:
|
|
YAHOO.log("Get Utility transaction started; transaction object: " + YAHOO.lang.dump(transactionObj), "info", "example");
|
|
|
|
}
|
|
|
|
return {
|
|
init: function() {
|
|
|
|
//suppress default form behavior
|
|
Event.on("siteExplorer", "submit", function(e) {
|
|
Event.preventDefault(e);
|
|
getSiteExplorerData();
|
|
}, this, true);
|
|
|
|
//instantiate Button:
|
|
var oButton = new Button("getSiteExplorerData");
|
|
YAHOO.log("Button instantiated.", "info", "example");
|
|
},
|
|
|
|
callback: function(results) {
|
|
YAHOO.log("Web service returned data to YAHOO.example.SiteExplorer.callback; beginning to process.", "info", "example");
|
|
|
|
//work with the returned data to extract meaningful fields:
|
|
var aResults = results.ResultSet.Result;
|
|
var totalLinks = results.ResultSet.totalResultsAvailable;
|
|
var returnedLinkCount = results.ResultSet.totalResultsReturned;
|
|
|
|
if(aResults) {//there are inbound links; process and display them:
|
|
|
|
//write header and open list of inbound links:
|
|
var html = "<h3>There are " +
|
|
totalLinks +
|
|
" inbound links for this page; here are the first " +
|
|
returnedLinkCount +
|
|
":</h3><ol>";
|
|
|
|
//process list of inbound links:
|
|
for (var i=0; i < aResults.length; i++) {
|
|
html += "<li><strong>" +
|
|
aResults[i].Title +
|
|
":</strong> <a href='" +
|
|
aResults[i].Url +
|
|
"'>" + aResults[i].Url +
|
|
"</a></li>";
|
|
}
|
|
|
|
//close list of inbound links
|
|
html += "</ol>";
|
|
|
|
} else {//no inbound links exist for this page:
|
|
|
|
var html = "<h3>There are no inbound links for the page specified.</h3";
|
|
|
|
}
|
|
|
|
//insert string into DOM:
|
|
elResults.innerHTML = html;
|
|
}
|
|
}
|
|
}();
|
|
|
|
//Initialize the example when the DOM is completely loaded:
|
|
YAHOO.util.Event.onDOMReady(
|
|
YAHOO.example.SiteExplorer.init,
|
|
YAHOO.example.SiteExplorer, //pass this object to init and...
|
|
true); //...run init in the passed object's
|
|
//scope
|
|
|
|
|
|
</script>
|
|
<!--END SOURCE CODE FOR EXAMPLE =============================== -->
|
|
|
|
</body>
|
|
</html> |