1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
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) . "&units=metric&timeout=10");
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);
|
