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Refactor IP region lookup to use external API

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Replaced the local ip2region database and related PHP classes with an external API (ip.asbid.cn) for IP region lookup in functions.php. Removed the entire ip2region directory and its dependencies, simplifying maintenance and reducing local storage requirements. Updated caching logic to store API results for one month. Also updated the theme version in index.php to 1.1.
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浪子
2025-06-29 11:29:04 +08:00
parent c106a387f2
commit 074af5187a
10 changed files with 75 additions and 1048 deletions
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ip2region/XdbSearcher.php
-368
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@@ -1,368 +0,0 @@
<?php
// Copyright 2022 The Ip2Region Authors. All rights reserved.
// Use of this source code is governed by a Apache2.0-style
// license that can be found in the LICENSE file.
//
// @Author Lion <chenxin619315@gmail.com>
// @Date 2022/06/21
class XdbSearcher
{
const HeaderInfoLength = 256;
const VectorIndexRows = 256;
const VectorIndexCols = 256;
const VectorIndexSize = 8;
const SegmentIndexSize = 14;
// xdb file handle
private $handle = null;
// header info
private $header = null;
private $ioCount = 0;
// vector index in binary string.
// string decode will be faster than the map based Array.
private $vectorIndex = null;
// xdb content buffer
private $contentBuff = null;
// ---
// static function to create searcher
/**
* @throws Exception
*/
public static function newWithFileOnly($dbFile)
{
return new XdbSearcher($dbFile, null, null);
}
/**
* @throws Exception
*/
public static function newWithVectorIndex($dbFile, $vIndex)
{
return new XdbSearcher($dbFile, $vIndex);
}
/**
* @throws Exception
*/
public static function newWithBuffer($cBuff)
{
return new XdbSearcher(null, null, $cBuff);
}
// --- End of static creator
/**
* initialize the xdb searcher
* @throws Exception
*/
function __construct($dbFile = null, $vectorIndex = null, $cBuff = null)
{
// check the content buffer first
if ($cBuff != null) {
$this->vectorIndex = null;
$this->contentBuff = $cBuff;
} else {
// 加载默认数据文件 by Anyon
if (is_null($dbFile)) {
$dbFile = __DIR__ . DIRECTORY_SEPARATOR . 'ip2region.xdb';
}
// open the xdb binary file
$this->handle = fopen($dbFile, "r");
if ($this->handle === false) {
throw new Exception("failed to open xdb file '%s'", $dbFile);
}
$this->vectorIndex = $vectorIndex;
}
}
function close()
{
if ($this->handle != null) {
fclose($this->handle);
}
}
function getIOCount()
{
return $this->ioCount;
}
/**
* find the region info for the specified ip address
* @throws Exception
*/
function search($ip)
{
// check and convert the sting ip to a 4-bytes long
if (is_string($ip)) {
$t = self::ip2long($ip);
if ($t === null) {
throw new Exception("invalid ip address `$ip`");
}
$ip = $t;
}
// reset the global counter
$this->ioCount = 0;
// locate the segment index block based on the vector index
$il0 = ($ip >> 24) & 0xFF;
$il1 = ($ip >> 16) & 0xFF;
$idx = $il0 * self::VectorIndexCols * self::VectorIndexSize + $il1 * self::VectorIndexSize;
if ($this->vectorIndex != null) {
$sPtr = self::getLong($this->vectorIndex, $idx);
$ePtr = self::getLong($this->vectorIndex, $idx + 4);
} elseif ($this->contentBuff != null) {
$sPtr = self::getLong($this->contentBuff, self::HeaderInfoLength + $idx);
$ePtr = self::getLong($this->contentBuff, self::HeaderInfoLength + $idx + 4);
} else {
// read the vector index block
$buff = $this->read(self::HeaderInfoLength + $idx, 8);
if ($buff === null) {
throw new Exception("failed to read vector index at {$idx}");
}
$sPtr = self::getLong($buff, 0);
$ePtr = self::getLong($buff, 4);
}
// printf("sPtr: %d, ePtr: %d\n", $sPtr, $ePtr);
// binary search the segment index to get the region info
$dataLen = 0;
$dataPtr = null;
$l = 0;
$h = ($ePtr - $sPtr) / self::SegmentIndexSize;
while ($l <= $h) {
$m = ($l + $h) >> 1;
$p = $sPtr + $m * self::SegmentIndexSize;
// read the segment index
$buff = $this->read($p, self::SegmentIndexSize);
if ($buff == null) {
throw new Exception("failed to read segment index at {$p}");
}
$sip = self::getLong($buff, 0);
if ($ip < $sip) {
$h = $m - 1;
} else {
$eip = self::getLong($buff, 4);
if ($ip > $eip) {
$l = $m + 1;
} else {
$dataLen = self::getShort($buff, 8);
$dataPtr = self::getLong($buff, 10);
break;
}
}
}
// match nothing interception.
// @TODO: could this even be a case ?
// printf("dataLen: %d, dataPtr: %d\n", $dataLen, $dataPtr);
if ($dataPtr == null) {
return null;
}
// load and return the region data
$buff = $this->read($dataPtr, $dataLen);
if ($buff == null) {
return null;
}
return $buff;
}
// read specified bytes from the specified index
private function read($offset, $len)
{
// check the in-memory buffer first
if ($this->contentBuff != null) {
return substr($this->contentBuff, $offset, $len);
}
// read from the file
$r = fseek($this->handle, $offset);
if ($r == -1) {
return null;
}
$this->ioCount++;
$buff = fread($this->handle, $len);
if ($buff === false) {
return null;
}
if (strlen($buff) != $len) {
return null;
}
return $buff;
}
// --- static util functions ----
// convert a string ip to long
public static function ip2long($ip)
{
$ip = ip2long($ip);
if ($ip === false) {
return null;
}
// convert signed int to unsigned int if on 32 bit operating system
if ($ip < 0 && PHP_INT_SIZE == 4) {
$ip = sprintf("%u", $ip);
}
return $ip;
}
// read a 4bytes long from a byte buffer
public static function getLong($b, $idx)
{
$val = (ord($b[$idx])) | (ord($b[$idx + 1]) << 8)
| (ord($b[$idx + 2]) << 16) | (ord($b[$idx + 3]) << 24);
// convert signed int to unsigned int if on 32 bit operating system
if ($val < 0 && PHP_INT_SIZE == 4) {
$val = sprintf("%u", $val);
}
return $val;
}
// read a 2bytes short from a byte buffer
public static function getShort($b, $idx)
{
return ((ord($b[$idx])) | (ord($b[$idx + 1]) << 8));
}
// load header info from a specified file handle
public static function loadHeader($handle)
{
if (fseek($handle, 0) == -1) {
return null;
}
$buff = fread($handle, self::HeaderInfoLength);
if ($buff === false) {
return null;
}
// read bytes length checking
if (strlen($buff) != self::HeaderInfoLength) {
return null;
}
// return the decoded header info
return [
'version' => self::getShort($buff, 0),
'indexPolicy' => self::getShort($buff, 2),
'createdAt' => self::getLong($buff, 4),
'startIndexPtr' => self::getLong($buff, 8),
'endIndexPtr' => self::getLong($buff, 12)
];
}
// load header info from the specified xdb file path
public static function loadHeaderFromFile($dbFile)
{
$handle = fopen($dbFile, 'r');
if ($handle === false) {
return null;
}
$header = self::loadHeader($handle);
fclose($handle);
return $header;
}
// load vector index from a file handle
public static function loadVectorIndex($handle)
{
if (fseek($handle, self::HeaderInfoLength) == -1) {
return null;
}
$rLen = self::VectorIndexRows * self::VectorIndexCols * self::SegmentIndexSize;
$buff = fread($handle, $rLen);
if ($buff === false) {
return null;
}
if (strlen($buff) != $rLen) {
return null;
}
return $buff;
}
// load vector index from a specified xdb file path
public static function loadVectorIndexFromFile($dbFile)
{
$handle = fopen($dbFile, 'r');
if ($handle === false) {
return null;
}
$vIndex = self::loadVectorIndex($handle);
fclose($handle);
return $vIndex;
}
// load the xdb content from a file handle
public static function loadContent($handle)
{
if (fseek($handle, 0, SEEK_END) == -1) {
return null;
}
$size = ftell($handle);
if ($size === false) {
return null;
}
// seek to the head for reading
if (fseek($handle, 0) == -1) {
return null;
}
$buff = fread($handle, $size);
if ($buff === false) {
return null;
}
// read length checking
if (strlen($buff) != $size) {
return null;
}
return $buff;
}
// load the xdb content from a file path
public static function loadContentFromFile($dbFile)
{
$str = file_get_contents($dbFile, false);
if ($str === false) {
return null;
} else {
return $str;
}
}
public static function now()
{
return (microtime(true) * 1000);
}
}