nasg/templates/404.j2.php

120 lines
2.6 KiB
PHP
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<?php
$redirects = array(
{% for from, to in redirects.items() %}
"{{ from }}" => "{{ to }}",
{% endfor %}
);
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$rewrites = array(
{% for from, to in rewrites.items() %}
"{{ from }}" => "{{ to }}",
{% endfor %}
);
$gone = array(
{% for gone in gones %}
"{{ gone }}" => true,
{% endfor %}
);
$gone_re = array(
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{% for gone in gone_re %}
"{{ gone }}",
{% endfor %}
);
function redirect_to($uri) {
header('HTTP/1.1 301 Moved Permanently');
if (preg_match("/^https?/", $uri))
$target = $uri;
else
$target = '{{ site.url }}/'. trim($uri, '/') . '/';
header("Location: ". $target);
exit;
}
function gone($uri) {
header('HTTP/1.1 410 Gone');
die('<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8"/>
<meta content="width=device-width,initial-scale=1,minimum-scale=1" name="viewport"/>
<title>Gone</title>
</head>
<body>
<h1><center>This content was deleted.</center></h1>
<hr>
<p><center>'.$uri.'</center></p>
</body>
</html>');
}
function notfound($uri) {
header('HTTP/1.0 404 Not Found');
die('<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8"/>
<meta content="width=device-width,initial-scale=1,minimum-scale=1" name="viewport"/>
<title>Not found</title>
</head>
<body>
<h1><center>This was not found.</center></h1>
<h2><center>Please search for it instead.</center></h2>
<p>
<center>
<form action="/search.php" class="search-form" method="get" role="search">
<label for="search">Search</label>
<input id="q" name="q" placeholder="search..." title="Search for:" type="search" value=""/>
<input type="submit" value="OK"/>
</form>
</center>
</p>
<hr>
<p><center>'.$uri.'</center></p>
</body>
</html>');
}
function maybe_redirect($uri) {
if (file_exists("./$uri/index.html")) {
redirect_to($uri);
}
}
$uri = filter_var($_SERVER['REQUEST_URI'], FILTER_SANITIZE_URL);
$uri = str_replace('../', '', $uri);
$uri = str_replace('/feed/', '', $uri);
$uri = str_replace('/atom/', '', $uri);
$uri = trim($uri, '/');
foreach ($gone_re as $pattern) {
if (preg_match(sprintf('/%s/', $pattern), $uri)) {
gone($uri);
}
}
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foreach ($rewrites as $pattern => $target) {
$maybe = preg_match(sprintf('/%s/i', $pattern), $uri, $matches);
if ($maybe) {
$target = str_replace('$1', $matches[1], $target);
redirect_to($target);
}
}
if (isset($gone[$uri])) {
gone($uri);
}
elseif (isset($redirects[$uri])) {
redirect_to($redirects[$uri]);
}
elseif (strstr($uri, '_')) {
maybe_redirect(str_replace('_', '-', $uri));
}
else {
notfound($uri);
}