Networks & Transactions 1 | Assignments / Assignment2Mike

Continuous Google

Online version: http://ernie.art.yale.edu/~michaelgallagher/Project_2/continuousGoogle_11.php

Source code:

<html>

<head>

<link rel="stylesheet" type="text/css" href="mike.css" />

<title>Surfin' Safari</title>

<script language="JavaScript">

</script>

</head>

<body>

<?php

// ----------------------------------- SET-UP TASKS -----------------------------------

// This is my license key
$googleKey = '7EV+OalQFHIGdrEgwfVbl0yhcNgnErbz';

// What should we search for
if (isset($_REQUEST["term"])) $term = trim($_REQUEST["term"]);

// What should the startIndex be
if (isset($_REQUEST["index"])) $index = intval($_REQUEST["index"]);
else $index = 0;
if ($index < 0) $index = 0;

// ---------------- DO THIS IF A SEARCH TERM WAS PASSED AS AN ARGUMENT ----------------

if (isset($term)) {

// ----- MAKE THE SOAP CLIENT

$client = new SoapClient("http://api.google.com/GoogleSearch.wsdl");

// ----- MAKE A REQUEST TO GOOGLE (using remote method invocation)

// Do the request repeatedly if it returns an error, until it comes back with no error
// Some days, Google seems to return a lot of "500 Internal Server Error"'s, see this thread:
// http://groups.google.com/group/google.public.web-apis/browse_thread/thread/3dcd39aef451775d/f0556ba48fc673b4?q=http+error&rnum=6
do {
$error = false;
try {
$response = $client->doGoogleSearch(
$googleKey,       // the key
$term, // the search query
$index,    // the point in the search results where we want to start
1, // the number of search results (max is 10)
false, // don't filter out similar results
"",             // no restricts
false, // no SafeSearch filter
"",             // no language restricts
"",             // not used
"" // not used
);
}
catch (Exception $e) {
$error = true;
echo '<p3>Exception... </p3>' . $e->getMessage() . "<br>\n";
ob_flush();
flush();
}
} while ($error);

// In PHP's special "try...catch" structure (which is similar to Java's),
// the code within the "try" block is always executed. But the code within the
// "catch" block is only executed, if an error occurs while executing the code in
// the "try" block. Note that try...catch is used for "runtime errors" only-- not
// errors in your code, but errors that can't be predicted, such as a problem with
// a server you're trying to access.
//
// Info about the error (technically called an "exception") is passed as a
// parameter to the "catch" block. So you should use the code in the "catch" block,
// to respond in some way to the potential error.
//
// In this case all we really do in the "catch" block is set a variable to true;
// then we repeat the whole thing if the variable is true, i.e. if there was an
// error, using do...while.

// ----- UNDERSTAND THE RESPONSE FROM GOOGLE AND DISPLAY THE RESULTS

// First check to see if there were any results
if (($response->estimatedTotalResultsCount > $index) and (count($response->resultElements) > 0)) {

// For convenience, load the resultElements node of the SOAP response into a variable
$resultsArray = $response->resultElements;

// Go through the array
for($resultNum = 0; $resultNum < count($resultsArray); $resultNum++) {

// Assign this result to a variable for convenience
$thisResult = $resultsArray[$resultNum];

// Display a link to the result website

$first_word = $thisResult->title;
$first_word = explode(' ',$first_word);

//echo '<h1><span class="highlight_5">' . " " . '</span></h1>';

for ($i = 0; $i <= count($first_word); $i++) {
echo '<p1><span class="highlight_1"><a href="#" onClick="searchPopup(\'' . $first_word[$i] . '\', 1);">';

// Start with the opening <a href> tag...
//echo '<a href="' . $thisResult->URL . '">';

// If a title is available, show it as the thing to click on
if ($thisResult->title != "") {
// First remove any HTML formatting that Google has inserted into the title
//echo strip_tags($thisResult->title) . '</a>  </span></p1>';
echo strip_tags($first_word[$i]) . '</a> </span></p1>';
}

// If there is no title, show the URL instead as the thing to click on
else {
// First replace "http://" with "" so it displays nicer
echo str_replace("http://", "", $thisResult->URL);
}

// Finish the link with the closing </a> tag
echo "</a>";

}

echo '<p1><span class="highlight_2"> </span></p1>';

// So one of these things has been output to the browser:
// <a href="http://yale.edu">Yale University</a>
// <a href="http://yale.edu">yale.edu</a>

// Display a snippet if available
if ($thisResult->snippet != "") {
// First remove any HTML formatting that Google has inserted into the snippet
echo '<p2><span class="highlight_3"> ' . strip_tags($thisResult->snippet) . ' </span></p2>';
echo '<p2><span class="highlight_2"> </span></p2>';
}

//display URL
echo '<p3><span class="highlight_4"> ';
echo str_replace("http://", "", $thisResult->URL);
echo ' </span><span class="highlight_2">&nbsp</span></p3>';

// Display a header with info
echo '<p3><span class="highlight_4"> ';
echo ""; // HTML character entity for left curly quote
echo $term;
echo ""; // HTML character entity for right curly quote
echo " results ";
echo '<p1><span class="highlight_1">' . $response->startIndex . '</span></p1>';
echo " of about ";
echo number_format($response->estimatedTotalResultsCount); // number_format() is just for formatting, it displays a comma between every 3 digits
echo "</span></p3>";

}

// ----- AFTER RESULTS ARE DISPLAYED, REQUEST MORE RESULTS

// Because we want the additional results in a new window, we do it by loading this script again into a new window

// Send a JavaScript command for the browser to request this PHP program again in a new a popup window, with a different startIndex
echo "\n\n";
echo '<script language="JavaScript">' . "\n";
echo '' . "\n";
echo '</script>' . "\n";

}

// ----- DISPLAY A MESSAGE IF THERE WERE NO RESULTS

else {

echo "<h1>No results.</h1>\n";

}

}

// --------------- DO THIS IF NO SEARCH TERM WAS PASSED AS AN ARGUMENT ----------------

else {

// ----- DISPLAY A SEARCH FORM

// This form's action is a little unusual because the response needs to load
// into a custom popup window rather than the same window as the form.
// So we use a JavaScript "onSubmit" handler instead of an HTML "action"
// attribute.

// Also, to work correctly, the form's "target" attribute needs to be set to
// the internal name of the popup window. But this also needs needs to be
// done by JavaScript, because the window name has to be computed
// dynamically so as to be unique for every search (otherwise windows would
// be re-used). So we pass a reference to the form to the searchPopup
// function, which can then set the form's target to be the same name as
// the popup window the function is creating.
// But sometimes the searchPopup function is called by the search results
// display (to load the next result), not by the form submit (to load the
// first result). In that case, the function still works even when no form
// reference is passed.

?>

<form name="searchForm" onSubmit="searchPopup(escape(String(this.term.value)), 0, this);">

<p1><span class="highlight_6">Welcome to the Infinite Google. </span><br>
<span class="highlight_5">Where do you want to explore? </span><br>
<span class="highlight_1">What would you like to search for? </span></p1><br>
<input type="text" name="term">
<input type="submit" value="Submit the search">

</form>

<?php

}

?>

</body>

</html>

Style sheet:

body {background-color: white}
span.highlight_1 {background-color: #FFBC00}
span.highlight_2 {background-color: #666666}
span.highlight_3 {background-color: #CECECE}
span.highlight_4 {background-color: #E1E1E1}
span.highlight_5 {background-color: #FFA201}
span.highlight_6 {background-color: #FF8401}
p1 {font-family: andale mono; font-size: 225%; color: black; line-height: 112%}
p2 {font-family: andale mono; font-size: 120%; color: black; line-height: 110%}
p3 {font-family: andale mono; font-size: 75%; color: black; line-height: 110%}
p4 {font-family: andale mono; font-size: 100%; color: #black; line-height: 112%}
a:link {color: #000000; text-decoration: none}
a:visited {background-color: #FFA201; text-decoration: none}
a:hover {background-color: #FFA201; text-decoration: none}
a:active {color: #0000FF; text-decoration: none}