101 lines
2.5 KiB
PHP
101 lines
2.5 KiB
PHP
<?php
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// Security: don't allow gets or posts for this app to exceed N in size because we just want a number less than 1000, you know??
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// todo: .htaccess -- add LimitRequestLine directive
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$id_key = "id";
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$id = 0;
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if( isset( $_GET ) && !empty( $_GET ) ) {
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$a_keys = array_keys( $_GET );
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if( in_array( $id_key, $a_keys ) && isset($_GET[$id_key]) ) {
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$id = $_GET[$id_key] * 1;
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} else {
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// ID is not valid
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print "e02";
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exit();
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}
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} else {
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// ID is not valid
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print "e01";
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exit();
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}
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// ID is too small
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if( $id < 0 ) {
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print "e03";
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exit();
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}
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// Now get load the data
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require( 'ring.php' );
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// ID is too large
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if( $id >= $ring_size ) {
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print "e04";
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exit();
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}
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$last = $ring_size - 1;
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$index = array_keys( $web_ring );
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$expected_domain = $web_ring[ $index[$id] ];
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$frame_parent = $_SERVER['HTTP_REFERER']."";
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if( $expected_domain != $frame_parent ) {
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$position = strpos( $frame_parent, $expected_domain );
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if( $position != 0 ) {
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print $expected_domain."<br />";
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print $frame_parent."<br />";
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print $position."<br />";
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print "e05";
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exit();
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}
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}
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// Onward
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$prev = "";
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$rand = "";
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$next = "";
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if( $id == $last ) { // are we at the end?
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$next = $index[0]; // first one
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$prev = $index[$id-1]; // previous one
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} else if( $id == 0 ) { // are we at the beginning?
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$next = $index[$id+1]; // next one
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$prev = $index[$last]; // last one
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} else { // somewhere in the middle
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$next = $index[$id+1];
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$prev = $index[$id-1];
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}
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$rand = $index[rand(0,$last)];
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$home_url = $web_ring[$index[0]];
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$rand_url = $web_ring[$rand];
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$prev_url = $web_ring[$prev];
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$next_url = $web_ring[$next]
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?><!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="utf-8" />
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<meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no" />
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<title>Tildeverse Web Ring</title>
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<link rel="stylesheet" href="style.css" />
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</head>
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<body id="frame">
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<div id="page">
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<a class="title" href="<?php print $home_url; ?>" target="_top" title="Webring Home Page">Tildeverse Loop</a>
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<ul>
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<li id="prev"><a href="<?php print $prev_url; ?>" target="_top" title="Previous Website"><< Prev</a></li>
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<li id="rand"><a href="<?php print $rand_url; ?>" target="_top" title="Random Website">Rand</a></li>
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<li id="next"><a href="<?php print $next_url; ?>" target="_top" title="Next Website">Next >></a></li>
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</ul>
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</div>
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</body>
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</html>
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