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decoder.php
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decoder.php
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<?php
require_once 'config.php';
require_once 'ip.php';
function from_zerowidth_to10($num) {
$from = 2;
$num = strval($num);
// $dict = array ('​','‌');
$dict = '01';
$len = strlen($num);
$dec = 0;
for($i = 0; $i < $len; $i++) {
$pos = strpos($dict, $num[$i]);
$dec = bcadd(bcmul(bcpow($from, $len - $i - 1), $pos), $dec);
}
return $dec;
}
$shortened = ltrim(rawurldecode($_SERVER['REQUEST_URI']),"/");
$shortenedsql = $shortened;
$ip = @$_SERVER['HTTP_CF_CONNECTING_IP'].",". @$_SERVER['HTTP_X_FORWARDED_FOR'].",".@$_SERVER['HTTP_X_REAL_IP'].",".@$_SERVER['HTTP_CLIENT_IP'].",".@$_SERVER['REMOTE_ADDR'];
if(!$ip) {
$ip = "";
}
try {
if ($dbconfig == "oracle") {
$db = new PDO($oracle_db,$db_user,$db_pass,array(PDO::ATTR_PERSISTENT => true,PDO::ATTR_TIMEOUT => 5)) or die("fail to connect db");
} elseif ($dbconfig == "mysql") {
$db = new PDO($mysql_db,$db_user,$db_pass,array(PDO::ATTR_PERSISTENT => true,PDO::ATTR_TIMEOUT => 5)) or die("fail to connect db");
} else {
$db = new PDO("sqlite:$sqlite_db") or die("fail to connect db");
}
}
catch(Exception $e) {
die($e);
}
$lasttime = date("Y-m-d H:i:s");
$shortened = str_replace(array('/', '?', '？', '@', ')', '）', '(', '（', '+', '，', '.', '。', ',', '】', ']', '【', '[', '『', '』', '{', '}', '\\', '、', ' '),'',$shortened);
if(strpos($shortened,"") !==false || strpos($shortened,"") !==false){
$zeroid = str_replace('','0',$shortened);
$zeroid = str_replace('','1',$zeroid);
$id = from_zerowidth_to10($zeroid);
if ($dbconfig == "oracle") {
$sql = 'select * from "main" where "id"='."'".$id."'";
} elseif ($dbconfig == "mysql") {
$sql = 'select * from main where binary id='."'".$id."'";
} else {
$sql = 'select * from main where id='."'".$id."'";
}
$result= $db->query($sql)->fetchAll(PDO::FETCH_ASSOC);
$url = $result[0]['url'];
$id = "zeroid_".$result[0]['id'];
$shortened = $result[0]['shortened'];
}else{
#容错歧义(相似)字符(非58进制请自行修改或删除以下代码)
if(strpos($shortened,"0") !==false || strpos($shortened,"O") !==false || strpos($shortened,"l") !==false || strpos($shortened,"I") !==false){
$shortened = str_replace('0','o',$shortened);
$shortened = str_replace('O','o',$shortened);
$shortened = str_replace('l','1',$shortened);
$shortened = str_replace('I','1',$shortened);
}
if ($dbconfig == "oracle") {
$sql = 'select * from "main" where "shortened"='."'".$shortened."'";
} elseif ($dbconfig == "mysql") {
$sql = 'select * from main where binary shortened='."'".$shortened."'";
} else {
$sql = 'select * from main where shortened='."'".$shortened."'";
}
$result = $db->query($sql)->fetchAll(PDO::FETCH_ASSOC);
$url = $result[0]['url'];
$id = $result[0]['shortened'];
}
if ($countset === "on") {
$ips = explode(',',$ip); //字符串转数组
$ips = array_flip($ips); //利用键值唯一性，反转键名与键值去重，比array_unique效率高
$ips = array_flip($ips); //反转回来
$ips = array_filter($ips); //去重空键值,null,empty,""等等
foreach($ips as $ipa) {
$ipa = trim($ipa);
$area .= convertip($ipa).",";
}
$area = rtrim($area,","); //去除结尾符号
$ip = implode(",",$ips); //数组转字符串
}
if (!empty($url)) {
header("HTTP/1.1 301 Moved Permanently");
header("Referrer-Policy: no-referrer");
header("location:" . $url);
fastcgi_finish_request();
if ($countset === "on") {
if ($dbconfig == "oracle") {
$db->exec('INSERT INTO "log" ("url", "shortened", "ip", "area", "time", "user_agent", "referer") VALUES ('."'".$url."'".', '."'".$id."'".', '."'".$ip."'".', '."'".$area."'".', '."'".$lasttime."'".', '."'".@$_SERVER[HTTP_USER_AGENT]."'".', '."'".@$_SERVER[HTTP_REFERER]."'".')');
$db->exec('UPDATE "main" set "count"="count"+1,"last_time"='."'".$lasttime."'".' where "shortened"='."'".$shortened."'");
} elseif ($dbconfig == "mysql") {
$db->exec('INSERT INTO log (url, shortened, ip, area, time, user_agent, referer) VALUES ('."'".$url."'".', '."'".$id."'".', '."'".$ip."'".', '."'".$area."'".', '."'".$lasttime."'".', '."'".@$_SERVER[HTTP_USER_AGENT]."'".', '."'".@$_SERVER[HTTP_REFERER]."'".')');
$db->exec('UPDATE main set count=count+1,last_time='."'".$lasttime."'".' where binary shortened='."'".$shortened."'");
} else {
$db->exec('INSERT INTO log (url, shortened, ip, area, time, user_agent, referer) VALUES ('."'".$url."'".', '."'".$id."'".', '."'".$ip."'".', '."'".$area."'".', '."'".$lasttime."'".', '."'".@$_SERVER[HTTP_USER_AGENT]."'".', '."'".@$_SERVER[HTTP_REFERER]."'".')');
$db->exec('UPDATE main set count=count+1,last_time='."'".$lasttime."'".' where shortened='."'".$shortened."'");
}
}
} else {
header("HTTP/1.1 301 Moved Permanently");
header("Referrer-Policy: no-referrer");
header("location:" . $domain);
fastcgi_finish_request();
if ($countset === "on") {
if ($dbconfig == "oracle") {
$db->query('INSERT INTO "log" ("shortened", "ip", "area", "time", "user_agent", "referer") VALUES ('."'".$shortenedsql."'".', '."'".$ip."'".', '."'".$area."'".', '."'".$lasttime."'".', '."'".@$_SERVER[HTTP_USER_AGENT]."'".', '."'".@$_SERVER[HTTP_REFERER]."'".')');
} else {
$db->query('INSERT INTO log (shortened, ip, area, time, user_agent, referer) VALUES ('."'".$shortenedsql."'".', '."'".$ip."'".', '."'".$area."'".', '."'".$lasttime."'".', '."'".@$_SERVER[HTTP_USER_AGENT]."'".', '."'".@$_SERVER[HTTP_REFERER]."'".')');
}
}
}
$db = null;
?>