first commit

.gitignore

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+# Binaries for programs and plugins
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+api
+
+# Test binary, built with `go test -c`
+*.test
+
+# Output of the go coverage tool
+*.out
+
+# Go workspace file
+go.work
+
+# Dependency directories
+vendor/
+
+# IDE files
+.idea/
+.vscode/
+*.swp
+*.swo
+*~
+
+# OS files
+.DS_Store
+Thumbs.db
+
+# Environment files
+.env
+*.env
+
+# Log files
+*.log
+
+# Temporary files
+tmp/
+temp/

build.sh

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+#!/bin/bash
+
+# User Expiry API - Linux Build Script
+# 用户到期API - Linux构建脚本
+
+echo "开始构建Linux版本..."
+echo "Building Linux version..."
+
+# 设置构建参数
+export GOOS=linux
+export GOARCH=amd64
+
+# 构建可执行文件
+echo "正在编译..."
+go build -o api main.go
+
+if [ $? -eq 0 ]; then
+    echo "✅ 构建成功！"
+    echo "✅ Build successful!"
+    echo ""
+    echo "生成的文件: api"
+    echo "Generated file: api"
+    echo ""
+    echo "部署说明:"
+    echo "Deployment instructions:"
+    echo "1. 上传 api 和 users.json 到Linux服务器"
+    echo "   Upload api and users.json to Linux server"
+    echo "2. 添加执行权限: chmod +x api"
+    echo "   Add execute permission: chmod +x api"
+    echo "3. 运行: ./api"
+    echo "   Run: ./api"
+    echo ""
+    ls -la api
+else
+    echo "❌ 构建失败！"
+    echo "❌ Build failed!"
+    exit 1
+fi

go.mod

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+module user-expiry-api
+
+go 1.21

main.go

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+package main
+
+import (
+	"encoding/json"
+	"flag"
+	"fmt"
+	"log"
+	"net"
+	"net/http"
+	"os"
+	"strings"
+	"time"
+)
+
+// User 用户数据结构
+type User struct {
+	IP         string `json:"ip"`
+	Username   string `json:"username"`
+	ExpiryDate string `json:"expiryDate"`
+	Phone      string `json:"phone"`
+}
+
+// UserData 用户数据容器
+type UserData struct {
+	Users []User `json:"users"`
+}
+
+// APIResponse API响应结构
+type APIResponse struct {
+	Expiry     string `json:"expiry"`
+	ServerTime string `json:"serverTime"`
+}
+
+// getClientIP 获取客户端真实IP地址
+func getClientIP(r *http.Request) string {
+	// 优先检查代理头
+	if xForwardedFor := r.Header.Get("X-Forwarded-For"); xForwardedFor != "" {
+		// X-Forwarded-For 可能包含多个IP，取第一个
+		ips := strings.Split(xForwardedFor, ",")
+		if len(ips) > 0 {
+			return strings.TrimSpace(ips[0])
+		}
+	}
+
+	if xRealIP := r.Header.Get("X-Real-IP"); xRealIP != "" {
+		return xRealIP
+	}
+
+	if xClientIP := r.Header.Get("X-Client-IP"); xClientIP != "" {
+		return xClientIP
+	}
+
+	// 从RemoteAddr获取IP
+	ip, _, err := net.SplitHostPort(r.RemoteAddr)
+	if err != nil {
+		return r.RemoteAddr
+	}
+
+	// 处理IPv6回环地址
+	if ip == "::1" {
+		return "127.0.0.1"
+	}
+
+	// 移除IPv6前缀
+	if strings.HasPrefix(ip, "::ffff:") {
+		return strings.TrimPrefix(ip, "::ffff:")
+	}
+
+	return ip
+}
+
+// loadUserData 加载用户数据
+func loadUserData() ([]User, error) {
+	data, err := os.ReadFile("users.json")
+	if err != nil {
+		return nil, err
+	}
+
+	var userData UserData
+	err = json.Unmarshal(data, &userData)
+	if err != nil {
+		return nil, err
+	}
+
+	return userData.Users, nil
+}
+
+// findUserByIP 根据IP查找用户
+func findUserByIP(users []User, ip string) *User {
+	for _, user := range users {
+		if user.IP == ip {
+			return &user
+		}
+	}
+	return nil
+}
+
+// setCORSHeaders 设置CORS头
+func setCORSHeaders(w http.ResponseWriter) {
+	w.Header().Set("Access-Control-Allow-Origin", "*")
+	w.Header().Set("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS")
+	w.Header().Set("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept, Authorization")
+}
+
+// healthHandler 健康检查处理器
+func healthHandler(w http.ResponseWriter, r *http.Request) {
+	setCORSHeaders(w)
+
+	if r.Method == "OPTIONS" {
+		w.WriteHeader(http.StatusOK)
+		return
+	}
+
+	w.Header().Set("Content-Type", "application/json")
+	w.WriteHeader(http.StatusOK)
+
+	response := map[string]interface{}{
+		"status": "ok",
+		"time":   time.Now().Format(time.RFC3339),
+	}
+
+	json.NewEncoder(w).Encode(response)
+}
+
+// checkExpiryHandler 检查到期时间处理器
+func checkExpiryHandler(w http.ResponseWriter, r *http.Request) {
+	setCORSHeaders(w)
+
+	if r.Method == "OPTIONS" {
+		w.WriteHeader(http.StatusOK)
+		return
+	}
+
+	// 获取客户端IP
+	clientIP := getClientIP(r)
+	log.Printf("收到来自 %s 的请求", clientIP)
+
+	// 获取当前服务器时间
+	serverTime := time.Now().Format(time.RFC3339)
+
+	// 加载用户数据
+	users, err := loadUserData()
+	if err != nil {
+		log.Printf("读取用户数据失败: %v", err)
+		w.Header().Set("Content-Type", "application/json")
+		w.WriteHeader(http.StatusOK)
+		json.NewEncoder(w).Encode(map[string]interface{}{})
+		return
+	}
+
+	// 查找用户
+	user := findUserByIP(users, clientIP)
+	if user == nil {
+		w.Header().Set("Content-Type", "application/json")
+		w.WriteHeader(http.StatusOK)
+		json.NewEncoder(w).Encode(map[string]interface{}{})
+		return
+	}
+
+	// 找到用户，返回到期时间
+	w.Header().Set("Content-Type", "application/json")
+	w.WriteHeader(http.StatusOK)
+	json.NewEncoder(w).Encode(APIResponse{
+		Expiry:     user.ExpiryDate,
+		ServerTime: serverTime,
+	})
+}
+
+func main() {
+	// 定义命令行参数
+	portFlag := flag.String("port", "3763", "服务器端口号")
+	flag.Parse()
+
+	// 设置路由
+	http.HandleFunc("/health", healthHandler)
+	http.HandleFunc("/api/check-expiry", checkExpiryHandler)
+
+	port := ":" + *portFlag
+	fmt.Printf("服务器运行在端口 %s\n", port)
+	fmt.Printf("健康检查: http://localhost%s/health\n", port)
+	fmt.Printf("API接口: http://localhost%s/api/check-expiry\n", port)
+
+	// 启动服务器
+	log.Fatal(http.ListenAndServe(port, nil))
+}

users.json

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+{
+  "users": [
+    {
+      "ip": "118.114.191.136",
+      "expiryDate": "2025-12-17T00:48:38+08:00",
+      "username": "user1",
+      "phone": "13800138000",
+      "versions": "旗舰版"
+    },
+    {
+      "ip": "127.0.0.1",
+      "expiryDate": "2025-12-17T00:48:38+08:00",
+      "username": "user1",
+      "phone": "13800138000",
+      "versions": "旗舰版"
+    }
+  ]
+}