新增maxmind数据库本地判断国家，并且将优先级调整至最高

2026-06-14 15:29:29 +08:00
parent 72d388f642
commit eab59c1c18
17 changed files with 912 additions and 38 deletions
@@ -0,0 +1,89 @@
+<?php
+/**
+ * CDN / 反代场景下解析访客真实 IP
+ */
+class ClientIpResolver
+{
+    /**
+     * @return string
+     */
+    public static function resolve()
+    {
+        static $resolved = null;
+        if ($resolved !== null) {
+            return $resolved;
+        }
+
+        $candidates = [];
+
+        if (!empty($_SERVER['HTTP_CF_CONNECTING_IP'])) {
+            $candidates[] = (string) $_SERVER['HTTP_CF_CONNECTING_IP'];
+        }
+        if (!empty($_SERVER['HTTP_TRUE_CLIENT_IP'])) {
+            $candidates[] = (string) $_SERVER['HTTP_TRUE_CLIENT_IP'];
+        }
+        if (!empty($_SERVER['HTTP_X_REAL_IP'])) {
+            $candidates[] = (string) $_SERVER['HTTP_X_REAL_IP'];
+        }
+        if (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])) {
+            foreach (explode(',', (string) $_SERVER['HTTP_X_FORWARDED_FOR']) as $part) {
+                $part = trim($part);
+                if ($part !== '' && strcasecmp($part, 'unknown') !== 0) {
+                    $candidates[] = $part;
+                }
+            }
+        }
+        if (!empty($_SERVER['REMOTE_ADDR'])) {
+            $candidates[] = (string) $_SERVER['REMOTE_ADDR'];
+        }
+
+        foreach ($candidates as $candidate) {
+            $ip = self::normalizeIp($candidate);
+            if ($ip === null) {
+                continue;
+            }
+            if (self::isPublicIp($ip)) {
+                $resolved = $ip;
+                return $resolved;
+            }
+        }
+
+        foreach ($candidates as $candidate) {
+            $ip = self::normalizeIp($candidate);
+            if ($ip !== null) {
+                $resolved = $ip;
+                return $resolved;
+            }
+        }
+
+        $resolved = '0.0.0.0';
+        return $resolved;
+    }
+
+    /**
+     * @param string $ip
+     */
+    public static function normalizeIp($ip)
+    {
+        $ip = trim($ip);
+        if ($ip === '' || strcasecmp($ip, 'unknown') === 0) {
+            return null;
+        }
+        if (filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4 | FILTER_FLAG_IPV6) === false) {
+            return null;
+        }
+        return $ip;
+    }
+
+    /**
+     * @param string $ip
+     */
+    private static function isPublicIp($ip)
+    {
+        return filter_var(
+            $ip,
+            FILTER_VALIDATE_IP,
+            FILTER_FLAG_NO_PRIV_RANGE | FILTER_FLAG_NO_RES_RANGE
+        ) !== false;
+    }
+}