diff options
Diffstat (limited to 'ratelimited/answer.php')
| -rw-r--r-- | ratelimited/answer.php | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/ratelimited/answer.php b/ratelimited/answer.php new file mode 100644 index 0000000..8bc9707 --- /dev/null +++ b/ratelimited/answer.php @@ -0,0 +1,99 @@ +<?php + +if (isset($_GET['q'])) { + $query = strtolower(substr($_GET['q'], 0, 200)); + $query = preg_replace("/[^A-Za-z0-9 ]/", '', preg_replace("/[\.]/", ' ', $query)); +} else { + header("Location: /"); + die(); +} + +$addr = sha1($_SERVER['REMOTE_ADDR']); +$cacheOnly = false; +$rl = [ + "local" => -1, + "global" => -1, + "blocked" => false +]; + +if (!file_exists($_SERVER['DOCUMENT_ROOT'] . "/private/ratelimiting/" . $addr)) { + file_put_contents($_SERVER['DOCUMENT_ROOT'] . "/private/ratelimiting/" . $addr, "1|" . date('YmdHi')); +} else { + $requests = (int)explode("|", file_get_contents($_SERVER['DOCUMENT_ROOT'] . "/private/ratelimiting/" . $addr))[0]; + $date = explode("|", file_get_contents($_SERVER['DOCUMENT_ROOT'] . "/private/ratelimiting/" . $addr))[1]; + if ($date === date('YmdHi')) { + $requests++; + if ($requests > 3) { + $cacheOnly = true; + $rl["blocked"] = true; + } + file_put_contents($_SERVER['DOCUMENT_ROOT'] . "/private/ratelimiting/" . $addr, $requests . "|" . date('YmdHi')); + } else { + file_put_contents($_SERVER['DOCUMENT_ROOT'] . "/private/ratelimiting/" . $addr, "1|" . date('YmdHi')); + } + + $rl["local"] = $requests; +} + +if (!file_exists($_SERVER['DOCUMENT_ROOT'] . "/private/ratelimiting/_global")) { + file_put_contents($_SERVER['DOCUMENT_ROOT'] . "/private/ratelimiting/_global", "1|" . date('YmdHi')); +} else { + $requests = (int)explode("|", file_get_contents($_SERVER['DOCUMENT_ROOT'] . "/private/ratelimiting/_global"))[0]; + $date = explode("|", file_get_contents($_SERVER['DOCUMENT_ROOT'] . "/private/ratelimiting/_global"))[1]; + if ($date === date('YmdHi')) { + $requests++; + if ($requests >= 20) { + $cacheOnly = true; + $rl["blocked"] = true; + } + file_put_contents($_SERVER['DOCUMENT_ROOT'] . "/private/ratelimiting/_global", $requests . "|" . date('YmdHi')); + } else { + file_put_contents($_SERVER['DOCUMENT_ROOT'] . "/private/ratelimiting/_global", "1|" . date('YmdHi')); + } + + $rl["global"] = $requests; +} + +if (!file_exists($_SERVER['DOCUMENT_ROOT'] . "/private/ratelimiting/_month")) { + file_put_contents($_SERVER['DOCUMENT_ROOT'] . "/private/ratelimiting/_month", "1|" . date('Ym')); +} else { + $requests = (int)explode("|", file_get_contents($_SERVER['DOCUMENT_ROOT'] . "/private/ratelimiting/_month"))[0]; + $date = explode("|", file_get_contents($_SERVER['DOCUMENT_ROOT'] . "/private/ratelimiting/_month"))[1]; + if ($date === date('Ym')) { + $requests++; + if ($requests >= 1990) { + $cacheOnly = true; + $rl["blocked"] = true; + } + file_put_contents($_SERVER['DOCUMENT_ROOT'] . "/private/ratelimiting/_month", $requests . "|" . date('Ym')); + } else { + file_put_contents($_SERVER['DOCUMENT_ROOT'] . "/private/ratelimiting/_month", "1|" . date('Ym')); + } + + $rl["monthly"] = $requests; +} + +header("Content-Type: text/plain"); +$text = urlencode($query); + +if (file_exists($_SERVER["DOCUMENT_ROOT"] . "/private/answers/" . str_replace(" ", "_", $query))) { + $ds = "local"; + $data = file_get_contents($_SERVER["DOCUMENT_ROOT"] . "/private/answers/" . str_replace(" ", "_", $query)); +} else if (file_exists($_SERVER["DOCUMENT_ROOT"] . "/private/cache/answer_" . str_replace(" ", "_", $query))) { + $ds = "cache"; + $data = file_get_contents($_SERVER["DOCUMENT_ROOT"] . "/private/cache/answer_" . str_replace(" ", "_", $query)); +} else { + if ($cacheOnly) { + die(); + } else { + $ds = "online"; + $ch = curl_init(); + curl_setopt($ch, CURLOPT_URL, "https://api.wolframalpha.com/v1/result?appid=" . urlencode(trim(file_get_contents($_SERVER['DOCUMENT_ROOT'] . "/private/keys/wolfram"))) . "&i=" . urlencode($query)); + curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE); + $data = curl_exec($ch); + curl_close($ch); + file_put_contents($_SERVER["DOCUMENT_ROOT"] . "/private/cache/answer_" . str_replace(" ", "_", $query), $data); + } +} + +die($data);
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