Using the google.load() Method with Google`s Ajax Libraries API - Source code for the sample Ajax application (
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In the section that you just read, I explained how to develop a primitive Ajax application that uses the Goggle API to download the jQuery library without using compression. Nevertheless, this application would look rather incomplete if I didn’t list the signature of its remaining source files.
So, here they are:
(definition for 'ajax_file_reader.htm' file)
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Reading file contents with jQuery library (uses Google API)</title>
<style type="text/css">
body{
padding: 0;
margin: 0;
background: #fff;
}
h1{
font: bold 18pt Arial, Helvetica, sans-serif;
color: #000;
}
#filecontents{
width: 600px;
padding: 10px;
border: 1px solid #999;
font: normal 10pt Arial, Helvetica, sans-serif;
color: #000;
}
</style>
<script src="http://www.google.com/jsapi"></script>
<script>
// load jQuery library with Google API (loads uncompressed source file)
google.load("jquery","1.2",{uncompressed:true});
google.setOnLoadCallback(function(){
$("#btn").click(function(){
$.get("read_file.php",function(fileContents){$("#filecontents").html(fileContents);});
});
});
</script>
</head>
<body>
<h1 id="header">Reading file contents with jQuery library (uses Google API)</h1>
<p><input type="button" id="btn" value="Read File Now!" /></p>
<div id="filecontents"></div>
</body>
</html>
definition for 'read_file.php' file)
<?php
if(!$contents=file_get_contents('data.txt')){
trigger_error('Error reading file contents',E_USER_ERROR);
}
echo $contents;
?>
(definition for 'data.txt' file)
These are contents of sample file. These are contents of sample file. These are contents of sample file. These are contents of sample file. These are contents of sample file. These are contents of sample file. These are contents of sample file. These are contents of sample file. These are contents of sample file. These are contents of sample file. These are contents of sample file. These are contents of sample file. These are contents of sample file. These are contents of sample file. These are contents of sample file. These are contents of sample file. These are contents of sample file. These are contents of sample file. These are contents of sample file. These are contents of sample file. These are contents of sample file. These are contents of sample file. These are contents of sample file. These are contents of sample file. These are contents of sample file. These are contents of sample file.
Now that you have at your disposal the entire source code of the above Ajax program, surely you’ll be able to test much more easily how long it takes to run when the jQuery library is delivered compressed and uncompressed from Google’s servers. Whether you decide to employ this Google API or not, one thing is certain: you'll have fun playing around with it!
Final thoughts
After this long and hopefully instructive journey, we’ve come to the end of the series. As was demonstrated by the code samples included in the different tutorials, learning to use Google's Ajax Libraries API is really very simple. The whole process is reduced to working with a couple of JavaScript methods and nothing else. Now, it’s up to you to decide whether or not to use this API when working with your preferred JavaScript package.
See you in the next tutorial!
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