57 lines
1.8 KiB
PHP
57 lines
1.8 KiB
PHP
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<?php
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/*
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* pgn4web javascript chessboard
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* copyright (C) 2009-2013 Paolo Casaschi
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* see README file and http://pgn4web.casaschi.net
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* for credits, license and more details
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*/
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error_reporting(E_ALL | E_STRICT);
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function get_param($param, $shortParam, $default) {
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if (isset($_REQUEST[$param])) { return $_REQUEST[$param]; }
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if (isset($_REQUEST[$shortParam])) { return $_REQUEST[$shortParam]; }
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return $default;
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}
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$pgnData = get_param("pgnData", "pd", "gotd.pgn");
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function get_pgnText($pgnUrl) {
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if (strpos($pgnUrl, ":") || (strpos($pgnUrl, "%3A"))) { return "[Event \"error: invalid pgnData=$pgnUrl\"]\n"; }
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$fileLimitBytes = 10000000; // 10Mb
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$pgnText = file_get_contents($pgnUrl, NULL, NULL, 0, $fileLimitBytes + 1);
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if (!$pgnText) { return "[Event \"error: failed to get pgnData=$pgnUrl\"]\n"; }
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$pgnText = str_replace(array("&", "<", ">"), array("&", "<", ">"), $pgnText);
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return $pgnText;
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}
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$pgnText = get_pgnText($pgnData);
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$numGames = preg_match_all("/(\s*\[\s*(\w+)\s*\"([^\"]*)\"\s*\]\s*)+[^\[]*/", $pgnText, $games );
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$gameNum = get_param("gameNum", "gn", "");
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$expiresDate = "";
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if ($gameNum == "random") { $gameNum = rand(1, $numGames); }
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else if (!preg_match("/^\d+$/", $gameNum)) {
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$timeNow = time();
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$expiresDate = gmdate("D, d M Y H:i:s", (floor($timeNow / (60 * 60 * 24)) + 1) * (60 * 60 * 24)) . " GMT";
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if (!preg_match("/^[ +-]\d+$/", $gameNum)) { $gameNum = 0; } // space is needed since + is urldecoded as space
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$gameNum = floor(($gameNum + ($timeNow / (60 * 60 * 24))) % $numGames) + 1;
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}
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else if ($gameNum < 1) { $gameNum = 1; }
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else if ($gameNum > $numGames) { $gameNum = $numGames; }
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$gameNum -= 1;
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header("content-type: application/x-chess-pgn");
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header("content-disposition: inline; filename=game.pgn");
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if ($expiresDate) {
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header("expires: " . $expiresDate);
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}
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print $games[0][$gameNum];
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?>
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