fanqie-go/cmd/fanqie/main.go

package main

import (
	"context"
	"fanqie/internal/algos"
	"fanqie/internal/common"
	"fanqie/internal/config"
	"fanqie/internal/fqapi"
	"fanqie/internal/handlers"
	"fmt"
	"log"
	"net/http"
	"os"
	"os/signal"
	"syscall"
	"time"
)

// Version / BuildTime 由编译时 -ldflags "-X main.Version=... -X main.BuildTime=..." 注入
var (
	Version   = "dev"
	BuildTime = "unknown"

	logger        = common.NewLogger("main", "INFO", "")
	configWatcher *config.ConfigWatcher
)

func main() {
	logger.Info(fmt.Sprintf("番茄小说API服务 版本=%s 编译时间=%s", Version, BuildTime))

	// 加载配置文件
	initConfig()

	// 初始化数据库
	if err := fqapi.InitDB(); err != nil {
		logger.Error("数据库初始化失败: " + err.Error())
		os.Exit(1)
	}
	defer fqapi.CloseCache() // 程序退出时关闭数据库

	// 初始化 Redis 缓存（可选）
	if err := fqapi.InitRedis(); err != nil {
		logger.Error("Redis 初始化失败: " + err.Error())
		os.Exit(1)
	}
	defer fqapi.CloseRedis()

	// 加载统计数据
	handlers.LoadStatistics()

	// 启动统计数据定期保存
	handlers.StartStatisticsSaver()
	defer handlers.StopStatisticsSaver() // 程序退出时保存统计数据

	// 启动缓存自动清理任务
	fqapi.StartCacheCleanup()
	defer fqapi.StopCacheCleanup() // 程序退出时停止清理任务

	// 初始化算法切换器
	initAlgorithm()

	// 初始化设备密钥池
	if err := initDeviceKeyPool(); err != nil {
		logger.Error("设备密钥池初始化失败: " + err.Error())
		os.Exit(1)
	}

	// 设置路由
	setupRoutes()

	// 启动服务器
	startServer()
}

// initConfig 初始化配置
func initConfig() {
	configPath := "./config/config.yaml"
	if _, err := os.Stat(configPath); os.IsNotExist(err) {
		os.MkdirAll("./config", 0755)
	}

	if err := config.LoadConfig(configPath); err != nil {
		logger.Warning(fmt.Sprintf("加载配置失败: %v", err))
	}

	// 启动配置文件热更新监控
	watcher, err := config.StartConfigWatcher(configPath)
	if err != nil {
		logger.Warning(fmt.Sprintf("配置监控失败: %v", err))
	} else {
		configWatcher = watcher
	}

	// 注册配置更新回调
	config.RegisterConfigCallback(func(cfg *config.Config) {
		algos.GlobalAlgorithmSwitcher.SwitchAlgorithm(cfg.Fanqie.Algorithm)
		algos.GlobalSignatureSwitcher.SwitchSignature(cfg.Fanqie.Signature)
	})
}

// initAlgorithm 初始化算法
func initAlgorithm() {
	if config.GetAppConfig() != nil {
		algos.GlobalAlgorithmSwitcher.SwitchAlgorithm(config.GetAppConfig().Fanqie.Algorithm)
		logger.Info(fmt.Sprintf("当前算法: %s", config.GetAppConfig().Fanqie.Algorithm))

		algos.GlobalSignatureSwitcher.SwitchSignature(config.GetAppConfig().Fanqie.Signature)

		// 根据签名方法显示详细信息
		var signatureDetails string
		if config.GetAppConfig().Fanqie.Signature == "sign4" {
			signatureDetails = "X-Gorgon + X-Ladon + X-Argus + X-Khronos"
		} else {
			signatureDetails = "X-Gorgon + X-Khronos"
		}
		logger.Info(fmt.Sprintf("当前签名方法: %s", signatureDetails))
	} else {
		algos.GlobalAlgorithmSwitcher.SwitchAlgorithm("gorgon")
		algos.GlobalSignatureSwitcher.SwitchSignature("sign2")
	}
}

// initDeviceKeyPool 初始化设备密钥池
func initDeviceKeyPool() error {
	pool := fqapi.GetDeviceKeyPool()
	if err := pool.Initialize(); err != nil {
		return fmt.Errorf("初始化设备密钥池失败: %w", err)
	}

	// 显示池状态
	stats := pool.GetStats()
	logger.Info(fmt.Sprintf("设备密钥池状态 - 总数: %d, 有效: %d, 无效: %d",
		stats["total"], stats["valid"], stats["invalid"]))

	return nil
}

// setupRoutes 设置路由
func setupRoutes() {
	http.HandleFunc("/", handlers.HandleMain)
	http.HandleFunc("/status", handlers.RequireAccessKey(handlers.HandleStatus))
	http.HandleFunc("/self-info", handlers.RequireAccessKey(handlers.HandleSelfInfo))
	http.HandleFunc("/vacuum", handlers.RequireAccessKey(handlers.HandleVacuum))

	http.HandleFunc("/healthz", handlers.HandleHealth)

	// API端点：限流 + protect_all 鉴权链（代理路由不鉴权，URL 由服务端生成不含 key）
	wrap := func(h http.HandlerFunc) http.HandlerFunc {
		return handlers.RateLimit(handlers.OptionalAccessKey(h))
	}
	http.HandleFunc("/search", wrap(handlers.HandleSearch))
	http.HandleFunc("/detail", wrap(handlers.HandleDetail))
	http.HandleFunc("/info", wrap(handlers.HandleDetail))
	http.HandleFunc("/catalog", wrap(handlers.HandleCatalog))
	http.HandleFunc("/directory/all_items", wrap(handlers.HandleCatalog))
	http.HandleFunc("/multi-detail", wrap(handlers.HandleMultiDetail))
	http.HandleFunc("/multi-content", wrap(handlers.HandleMultiContent))
	http.HandleFunc("/content", wrap(handlers.HandleContent))
	http.HandleFunc("/item-summary", wrap(handlers.HandleItemSummary))
	http.HandleFunc("/category-front", wrap(handlers.HandleCategoryFront))
	http.HandleFunc("/category-landing", wrap(handlers.HandleCategoryLanding))
	http.HandleFunc("/audio", wrap(handlers.HandleAudio))
	http.HandleFunc("/audio/proxy/", wrap(handlers.HandleAudioProxy))
	http.HandleFunc("/video", wrap(handlers.HandleVideo))
	http.HandleFunc("/manga", wrap(handlers.HandleManga))
	http.HandleFunc("/manga/image/", wrap(handlers.HandleMangaImageProxy))

	// 评论相关端点
	http.HandleFunc("/chapter_review", wrap(handlers.HandleChapterReview))
	http.HandleFunc("/review", wrap(handlers.HandleReview))
	http.HandleFunc("/review_html", wrap(handlers.HandleReviewHTML))

	// 表情图片静态文件服务
	http.Handle("/emoji/", http.StripPrefix("/emoji/", http.FileServer(http.Dir("emoji"))))
}

// startServer 启动服务器
func startServer() {
	host := "0.0.0.0"
	port := "40180"

	if config.GetAppConfig() != nil {
		if config.GetAppConfig().Server.Host != "" {
			host = config.GetAppConfig().Server.Host
		}
		if config.GetAppConfig().Server.Port != "" {
			port = config.GetAppConfig().Server.Port
		}
	}

	addr := host + ":" + port
	server := &http.Server{
		Addr: addr,
		// 超时保护：防止慢客户端长期占用连接
		ReadHeaderTimeout: 10 * time.Second,
		ReadTimeout:       60 * time.Second,
		WriteTimeout:      10 * time.Minute, // 代理响应整体缓冲后写出，慢客户端下载大音频/图片需要余量
		IdleTimeout:       120 * time.Second,
	}

	go func() {
		logger.Info(fmt.Sprintf("服务器启动在 %s", addr))
		if err := server.ListenAndServe(); err != nil && err != http.ErrServerClosed {
			logger.Error(fmt.Sprintf("服务器启动失败: %v", err))
			os.Exit(1)
		}
	}()

	// 等待退出信号，优雅关闭，让 main 中的 defer（保存统计、关闭数据库）得以执行
	sigCh := make(chan os.Signal, 1)
	signal.Notify(sigCh, os.Interrupt, syscall.SIGTERM)
	<-sigCh
	logger.Info("收到退出信号，正在关闭服务器...")

	ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
	defer cancel()
	if err := server.Shutdown(ctx); err != nil {
		logger.Warning(fmt.Sprintf("服务器关闭超时（30秒内未完成的连接被强制断开）: %v", err))
	}
	logger.Info("服务器已关闭")
}

func init() {
	log.SetFlags(log.LstdFlags | log.Lshortfile)
}