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<?php |
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// Copyright (C) 2014 Universitätsbibliothek Mannheim |
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// See file LICENSE for license details. |
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// Poll up to 300 s for changes in the database and return its data in |
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// JSON format. The previous data is passed via URL request (?json=DATA). |
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// TODO: Use db triggers instead of time based polling. |
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require_once('DBConnector.class.php'); |
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$dbcon = new DBConnector(); |
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$remote = $_SERVER['REMOTE_ADDR']; |
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$isAllowed = false; |
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$newJSON = '{}'; |
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$oldJSON = ''; |
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if (!empty($_REQUEST['json'])) { |
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$oldJSON = $_REQUEST['json']; |
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$oldJSONarr = json_decode($oldJSON, true); |
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array_walk_recursive($oldJSONarr, function(&$value, $key) { |
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if (is_string($value) && preg_match('/^http/', $value)) { |
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$value = rawurlencode($value); |
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} |
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}); |
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$oldJSON = json_encode($oldJSONarr); |
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trace("db old: $oldJSON"); |
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} |
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for ($t = 0; $t < 300; $t++) { |
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//~ echo("waiting for db change...<br>"); |
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//~ $array = ['username' => 'stweil', 'quux' => 'baz']; |
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//~ $newJSON = json_encode($array); |
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$database = array(); |
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$table = $dbcon->query('select * from setting'); |
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$data = array(); |
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while ($row = $table->fetchArray(SQLITE3_ASSOC)) { |
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array_push($data, $row); |
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} |
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$database['setting'] = $data; |
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$table = $dbcon->query('select * from address'); |
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$data = array(); |
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while ($row = $table->fetchArray(SQLITE3_ASSOC)) { |
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array_push($data, $row); |
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$isAllowed = $isAllowed || ($row['address'] == $remote); |
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} |
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if (!$isAllowed) { |
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// Some unauthorized host tried to read the database. |
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// Don't return any data. |
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break; |
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} |
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$database['address'] = $data; |
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$table = $dbcon->query('select * from user'); |
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$data = array(); |
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while ($row = $table->fetchArray(SQLITE3_ASSOC)) { |
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array_push($data, $row); |
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} |
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$database['user'] = $data; |
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$table = $dbcon->query('select * from window'); |
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$data = array(); |
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while ($row = $table->fetchArray(SQLITE3_ASSOC)) { |
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array_push($data, $row); |
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} |
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$database['window'] = $data; |
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//~ $newJSON = json_encode($database, JSON_PRETTY_PRINT); |
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array_walk_recursive($database, function(&$value, $key) { |
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if (is_string($value) && preg_match('/^http/', $value)) { |
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$value = rawurlencode($value); |
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} |
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}); |
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$newJSON = json_encode($database); |
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if ($oldJSON != $newJSON) { |
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trace("db new: $newJSON"); |
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break; |
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} |
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sleep(1); |
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} |
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touch("last_activity"); |
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echo($newJSON); |
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UB-Mannheim /
PalMA
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This check looks for parameters that have been defined for a function or method, but which are not used in the method body.