I should think you have misunderstood. The redirect will either be internal (the Web server itself chooses a different file) or via a HTTP redirect. A search engine wouldn't even know about the former, and it would be completely broken if it ignored the latter.Originally Posted by wkenny
Search engines will not process "redirects" implemented through client-side scripts, and they are wary of meta element "redirects". The latter can easily be abused.
Can you post a link to where you read this information?
What can be done is to check the modification time of each source that makes up a document, and compare it against the time of the generated document (if it exists). If the generated document is older than the newest source, it is regenerated. Eventually, a temporary redirect is returned that refers to the generated version.Text on one of the links from the page you referred me to says " It is easy to directly pre-generate a page to its static form" but does not say how. This is what I need.
Something along the lines of:
PHP Code:<?php
/* This file name needs to be determined somehow. The name of the PHP file is sensible, but not
* necessarily appropriate. Do no use an absolute path (without making the necessary changes,
* below).
*/
$destination = '...';
/* A list of files used to construct the document. */
$sources = array('header.fragment', 'content.fragment', 'footer.fragment');
if (!file_exists($destination . '.lock')) {
touch($destination . '.lock');
}
$lockFile = fopen($destination . '.lock', 'r');
flock($lockFile, LOCK_SH);
if (isStale($destination, $sources)) {
/* Upgrade lock before writing. */
flock($lockFile, LOCK_EX);
$destinationFile = fopen($destination, 'w');
ob_start();
/* Output contents... */
fwrite($destinationFile, ob_get_contents());
fclose($destinationFile);
ob_end_clean();
}
flock($lockFile, LOCK_UN);
fclose($lockFile);
/* Change the domain name as necessary. */
$destinationUri = 'http://www.example.com' . rtrim(dirname($_SERVER['PHP_SELF']), '/')
. '/' . $destination;
header('Location: ' . $destinationUri);
?>
<!DOCTYPE html "-//W3C//DTD HTML 4.01/EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<title>Continue to <?php echo $destinationUri; ?></title>
</head>
<body>
<p>Please continue to <a href="<?php echo $destinationUri; ?>"><?php echo $destination; ?></a>.</p>
</body>
</html>
<?php
function isStale($destination, $sources) {
if (!file_exists($destination)) {
return true;
}
$generationTime = filemtime($destination);
foreach ($sources as $source) {
if ($generationTime < filemtime($source)) {
return true;
}
}
return false;
}
?>
In principle it's simple, but it can get awkward with many sources without some abstraction. One also needs to check that it's less resource-consuming to test the modification times than it is to generate the document (as well as cache-related headers like ETags, and Last-Modified, and Content-Length to facilitate persistent connections).
Mike
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comes across strange issue
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