chenxin
1a4997e031
- 正文参数支持语义值(plain/html/keep/remove)与别名(img_mode/review_mode)，URL 参数优先于配置 - 修复纯文本被段评强制包回 HTML、HTML 模式段评注入失效的问题 - 修复 PKCS7 填充弱校验导致漫画/正文偶发解密乱码返回 200 的问题 - 搜索结果展平：去 search_tabs 层与 selected_tab_idx/server_ab_params，提升 has_more/next_offset - 全接口解包字符串形式的 JSON 字段(category_schema 等)，缓存出口幂等处理 - 序列化关闭 HTML 转义，video/audio 播放链接可直接复制播放 - video 响应透传 CENC 加密状态(key_seed/kid/encryption_method) - 新增 gzip 中间件，JSON/文本响应压缩约 81%，二进制透传 - 漫画默认输出模式改为 proxy(url 模式链接 404 且内容加密不可用) - openapi.yaml：补全 23 个路径参数定义、tab_type 完整枚举、CDN 签名说明，示例更新
622 lines
17 KiB
Go
622 lines
17 KiB
Go
package fqapi
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import (
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"context"
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"database/sql"
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"encoding/json"
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"fanqie/internal/common"
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"fanqie/internal/config"
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"fmt"
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"net/url"
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"strconv"
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"strings"
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"sync/atomic"
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"time"
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_ "github.com/jackc/pgx/v5/stdlib"
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_ "github.com/mattn/go-sqlite3"
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"github.com/redis/go-redis/v9"
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)
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var (
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cacheDB *sql.DB
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dbDriver string // "sqlite3" | "pgx"
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redisCache *redis.Client
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cacheLogger = common.NewLogger("cache_manager", "INFO", "")
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contentRequestCount atomic.Int64 // content接口访问计数
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cacheCleanupTicker *time.Ticker // 缓存清理定时器
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)
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// q 按数据库方言转换占位符（PostgreSQL 使用 $n 形式）
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func q(query string) string {
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if dbDriver != "pgx" {
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return query
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}
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var b strings.Builder
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n := 0
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for i := 0; i < len(query); i++ {
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if query[i] == '?' {
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n++
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b.WriteString("$" + strconv.Itoa(n))
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} else {
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b.WriteByte(query[i])
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}
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}
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return b.String()
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}
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// InitRedis 初始化 Redis 缓存（启用后正文缓存与音频代理缓存走 Redis）
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func InitRedis() error {
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cfg := config.GetAppConfig()
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if cfg == nil || !cfg.Cache.Redis.Enabled {
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return nil
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}
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redisCache = redis.NewClient(&redis.Options{
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Addr: fmt.Sprintf("%s:%d", cfg.Cache.Redis.Host, cfg.Cache.Redis.Port),
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Password: cfg.Cache.Redis.Password,
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DB: cfg.Cache.Redis.DB,
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})
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ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
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defer cancel()
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if err := redisCache.Ping(ctx).Err(); err != nil {
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redisCache = nil
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return fmt.Errorf("连接 Redis 失败: %w", err)
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}
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cacheLogger.Info(fmt.Sprintf("Redis 缓存已启用: %s:%d db=%d", cfg.Cache.Redis.Host, cfg.Cache.Redis.Port, cfg.Cache.Redis.DB))
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return nil
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}
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// CloseRedis 关闭 Redis 连接
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func CloseRedis() {
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if redisCache != nil {
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redisCache.Close()
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}
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}
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// CacheData 缓存数据结构
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type CacheData struct {
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Data string `json:"data"`
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Expi float64 `json:"expi"`
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}
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// InitDB 初始化数据库（按 cache.backend 选择 sqlite 或 postgres）
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func InitDB() error {
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if cacheDB != nil {
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return nil // 已初始化
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}
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cfg := config.GetAppConfig()
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backend := "sqlite"
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dsn := "./cache.db"
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if cfg != nil {
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if cfg.Cache.Backend != "" {
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backend = cfg.Cache.Backend
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}
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if backend == "postgres" {
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pg := cfg.Cache.Postgres
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if pg.Host == "" || pg.Database == "" {
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return fmt.Errorf("cache.backend 为 postgres 但未配置 host/database")
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}
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// 用 net/url 构造连接串，密码中的特殊字符会被自动转义
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u := &url.URL{
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Scheme: "postgres",
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User: url.UserPassword(pg.User, pg.Password),
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Host: fmt.Sprintf("%s:%d", pg.Host, pg.Port),
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Path: pg.Database,
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RawQuery: "sslmode=" + pg.SSLMode,
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}
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dsn = u.String()
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} else if cfg.Cache.SQLitePath != "" {
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dsn = cfg.Cache.SQLitePath
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}
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}
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switch backend {
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case "postgres":
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dbDriver = "pgx"
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default:
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dbDriver = "sqlite3"
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// ponytail: 单文件场景，WAL + 忙等待即可，无需更多调优
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dsn = dsn + "?_journal_mode=WAL&_busy_timeout=5000"
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}
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var err error
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cacheDB, err = sql.Open(dbDriver, dsn)
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if err != nil {
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cacheLogger.Error("打开数据库失败: " + err.Error())
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return err
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}
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if err := cacheDB.Ping(); err != nil {
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cacheLogger.Error("连接数据库失败: " + err.Error())
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return err
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}
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cacheLogger.Info(fmt.Sprintf("数据库已连接: %s (driver=%s)", backend, dbDriver))
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if err := createTables(); err != nil {
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return err
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}
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return nil
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}
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// createTables 创建数据表（两套 DDL 各自兼容对应方言）
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func createTables() error {
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// 通用部分：statistics 初始化、索引、audio_cache 建表在两方言间一致或按 q() 转换
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tables := []struct{ name, sqliteDDL, pgDDL string }{
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{"cache",
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`CREATE TABLE IF NOT EXISTS cache (
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key TEXT PRIMARY KEY,
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value TEXT,
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created_at INTEGER DEFAULT (strftime('%s', 'now'))
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)`,
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`CREATE TABLE IF NOT EXISTS cache (
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key TEXT PRIMARY KEY,
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value TEXT,
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created_at INTEGER DEFAULT 0
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)`},
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{"statistics",
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`CREATE TABLE IF NOT EXISTS statistics (
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id INTEGER PRIMARY KEY CHECK (id = 1),
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total_requests INTEGER DEFAULT 0,
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search_requests INTEGER DEFAULT 0,
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detail_requests INTEGER DEFAULT 0,
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catalog_requests INTEGER DEFAULT 0,
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content_requests INTEGER DEFAULT 0,
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manga_requests INTEGER DEFAULT 0,
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audio_requests INTEGER DEFAULT 0,
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video_requests INTEGER DEFAULT 0,
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category_requests INTEGER DEFAULT 0,
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updated_at INTEGER DEFAULT (strftime('%s', 'now'))
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)`,
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`CREATE TABLE IF NOT EXISTS statistics (
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id INTEGER PRIMARY KEY CHECK (id = 1),
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total_requests INTEGER DEFAULT 0,
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search_requests INTEGER DEFAULT 0,
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detail_requests INTEGER DEFAULT 0,
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catalog_requests INTEGER DEFAULT 0,
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content_requests INTEGER DEFAULT 0,
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manga_requests INTEGER DEFAULT 0,
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audio_requests INTEGER DEFAULT 0,
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video_requests INTEGER DEFAULT 0,
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category_requests INTEGER DEFAULT 0,
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updated_at INTEGER DEFAULT 0
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)`},
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{"device_pool",
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`CREATE TABLE IF NOT EXISTS device_pool (
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id INTEGER PRIMARY KEY AUTOINCREMENT,
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device_header TEXT NOT NULL,
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key TEXT NOT NULL,
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key_ver INTEGER NOT NULL,
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is_valid INTEGER DEFAULT 1,
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created_at INTEGER NOT NULL,
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last_used_at INTEGER NOT NULL
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)`,
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`CREATE TABLE IF NOT EXISTS device_pool (
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id BIGSERIAL PRIMARY KEY,
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device_header TEXT NOT NULL,
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key TEXT NOT NULL,
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key_ver INTEGER NOT NULL,
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is_valid INTEGER DEFAULT 1,
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created_at INTEGER NOT NULL,
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last_used_at INTEGER NOT NULL
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)`},
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{"audio_cache",
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`CREATE TABLE IF NOT EXISTS audio_cache (
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key TEXT PRIMARY KEY,
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original_url TEXT NOT NULL,
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device_id TEXT NOT NULL,
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headers TEXT,
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created_at INTEGER DEFAULT (strftime('%s', 'now'))
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)`,
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`CREATE TABLE IF NOT EXISTS audio_cache (
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key TEXT PRIMARY KEY,
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original_url TEXT NOT NULL,
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device_id TEXT NOT NULL,
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headers TEXT,
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created_at INTEGER DEFAULT 0
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)`},
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}
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for _, t := range tables {
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ddl := t.sqliteDDL
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if dbDriver == "pgx" {
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ddl = t.pgDDL
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}
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if _, err := cacheDB.Exec(ddl); err != nil {
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cacheLogger.Error("创建" + t.name + "表失败: " + err.Error())
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return err
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}
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}
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// 初始化statistics表（如果不存在记录）
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if _, err := cacheDB.Exec(`INSERT INTO statistics (id) VALUES (1) ON CONFLICT (id) DO NOTHING`); err != nil {
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cacheLogger.Error("初始化statistics表失败: " + err.Error())
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}
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// 创建索引以提高清理效率
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if _, err := cacheDB.Exec(`CREATE INDEX IF NOT EXISTS idx_created_at ON cache(created_at)`); err != nil {
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cacheLogger.Error("创建索引失败: " + err.Error())
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}
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if _, err := cacheDB.Exec(`CREATE INDEX IF NOT EXISTS idx_device_pool_valid ON device_pool(is_valid)`); err != nil {
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cacheLogger.Warning("创建device_pool索引失败: " + err.Error())
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}
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return nil
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}
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// isCacheEnabled 检查正文内容缓存是否启用
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func isCacheEnabled() bool {
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cfg := config.GetAppConfig()
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if cfg == nil {
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return false
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}
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return cfg.Cache.Enabled
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}
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// withCache 只读接口的缓存包装：命中直接返回，miss 回源后写入（仅缓存成功响应）
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// ponytail: 空参等防御分支若漏到此处，其错误 JSON 也会被缓存到 TTL 到期——handler 层 validateParams 已拦截
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func withCache(key string, ttl int, fetch func() (string, error)) (string, error) {
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if c := GetCache(key); c != "" {
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// 旧缓存可能存有未解包的 JSON 字符串字段，出口幂等解包
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// （对新写入的已解包数据无影响）
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return reencodeUnwrapped(c), nil
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}
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result, err := fetch()
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if err == nil {
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UpdateCache(key, result, ttl)
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}
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return result, err
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}
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// GetCache 获取正文内容缓存
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func GetCache(key string) string {
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if !isCacheEnabled() {
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return ""
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}
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if redisCache != nil {
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return redisGetCache(key)
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}
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if cacheDB == nil {
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return ""
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}
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var value string
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err := cacheDB.QueryRow(q("SELECT value FROM cache WHERE key = ?"), key).Scan(&value)
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if err != nil {
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if err != sql.ErrNoRows {
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cacheLogger.Error("查询缓存失败: " + err.Error())
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}
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return ""
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}
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var cacheData CacheData
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err = json.Unmarshal([]byte(value), &cacheData)
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if err != nil {
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cacheLogger.Error("解析缓存数据失败: " + err.Error())
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return ""
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}
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cacheLogger.Debug("缓存命中: " + key)
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// 检查是否过期
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if time.Now().Unix() < int64(cacheData.Expi) {
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cacheLogger.Debug("缓存有效！")
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return cacheData.Data
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}
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cacheLogger.Debug("缓存已过期！")
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return ""
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}
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// UpdateCache 更新或插入正文内容缓存
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func UpdateCache(key string, value string, expi int) error {
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if !isCacheEnabled() {
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return nil
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}
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if redisCache != nil {
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return redisUpdateCache(key, value, expi)
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}
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if cacheDB == nil {
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return nil
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}
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cacheData := CacheData{
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Data: value,
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Expi: float64(time.Now().Unix() + int64(expi)),
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}
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jsonData, err := json.Marshal(cacheData)
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if err != nil {
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return err
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}
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// UPSERT：ON CONFLICT 语法 SQLite 3.24+ 与 PostgreSQL 通用
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_, err = cacheDB.Exec(q(`INSERT INTO cache (key, value, created_at) VALUES (?, ?, ?)
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ON CONFLICT(key) DO UPDATE SET value = excluded.value`), key, string(jsonData), time.Now().Unix())
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if err != nil {
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cacheLogger.Error("更新缓存失败: " + err.Error())
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return err
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}
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cacheLogger.Debug("缓存已更新: " + key)
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return nil
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}
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// CloseCache 关闭缓存数据库
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func CloseCache() {
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if cacheDB != nil {
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cacheDB.Close()
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}
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}
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// CleanupAllCache 立即清理所有正文缓存
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func CleanupAllCache() error {
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if cacheDB == nil {
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return fmt.Errorf("数据库未初始化")
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}
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// 删除所有缓存数据
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_, err := cacheDB.Exec("DELETE FROM cache")
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if err != nil {
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return err
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}
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// 智能压缩：仅在空闲空间超过阈值时执行（仅 SQLite，PG 由 autovacuum 自行管理）
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if dbDriver == "pgx" {
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return nil
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}
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var freelistCount int64
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err = cacheDB.QueryRow("PRAGMA freelist_count").Scan(&freelistCount)
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if err == nil && freelistCount > 0 {
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var pageSize int64
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err = cacheDB.QueryRow("PRAGMA page_size").Scan(&pageSize)
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if err == nil {
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freeBytes := freelistCount * pageSize
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// 阈值：空闲空间超过 5MB 时才执行压缩
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const vacuumThreshold = 5 * 1024 * 1024 // 5MB
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if freeBytes >= vacuumThreshold {
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cacheLogger.Info(fmt.Sprintf("空闲空间 %.2f MB，开始执行压缩...", float64(freeBytes)/(1024*1024)))
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_, err = cacheDB.Exec("VACUUM")
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if err != nil {
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cacheLogger.Warning("数据库压缩失败: " + err.Error())
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} else {
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cacheLogger.Info(fmt.Sprintf("数据库压缩完成，已释放 %.2f MB 磁盘空间", float64(freeBytes)/(1024*1024)))
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}
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} else {
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cacheLogger.Debug(fmt.Sprintf("空闲空间仅 %.2f MB，跳过压缩", float64(freeBytes)/(1024*1024)))
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}
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}
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}
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return nil
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}
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// CleanupExpiredCache 清理过期的正文缓存
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func CleanupExpiredCache() error {
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cfg := config.GetAppConfig()
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if cfg == nil {
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return fmt.Errorf("配置未加载")
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}
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// 检查是否启用清理
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if !cfg.Cache.CleanupEnabled {
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return nil
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}
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// 检查清理时间配置
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if cfg.Cache.CleanupSeconds <= 0 {
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return nil
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}
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if cacheDB == nil {
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return fmt.Errorf("数据库未初始化")
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}
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// 计算过期时间点（当前时间 - cleanup_seconds）
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expiredTime := time.Now().Unix() - int64(cfg.Cache.CleanupSeconds)
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// 删除过期的缓存（created_at < expiredTime）
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result, err := cacheDB.Exec(q("DELETE FROM cache WHERE created_at < ?"), expiredTime)
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if err != nil {
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cacheLogger.Error("清理过期缓存失败: " + err.Error())
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return err
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}
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// 获取删除的行数
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rowsAffected, err := result.RowsAffected()
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if err != nil {
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cacheLogger.Warning("获取删除行数失败: " + err.Error())
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} else if rowsAffected > 0 {
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cacheLogger.Info(fmt.Sprintf("已清理 %d 条过期缓存（创建时间早于 %d 秒前）", rowsAffected, cfg.Cache.CleanupSeconds))
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}
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return nil
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}
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// StartCacheCleanup 启动缓存自动清理任务
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func StartCacheCleanup() {
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cfg := config.GetAppConfig()
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if cfg == nil || !cfg.Cache.CleanupEnabled || cfg.Cache.CleanupSeconds <= 0 {
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cacheLogger.Info("缓存自动清理未启用或配置无效，跳过启动")
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return
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}
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// 每小时执行一次清理（可以根据需要调整间隔）
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cleanupInterval := 1 * time.Hour
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cacheCleanupTicker = time.NewTicker(cleanupInterval)
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cacheLogger.Info(fmt.Sprintf("缓存自动清理已启动，清理间隔: %v，过期时间: %d 秒", cleanupInterval, cfg.Cache.CleanupSeconds))
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// 立即执行一次清理
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go func() {
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if err := CleanupExpiredCache(); err != nil {
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cacheLogger.Error("初始清理失败: " + err.Error())
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}
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}()
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// 定时执行清理
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go func() {
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for range cacheCleanupTicker.C {
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if err := CleanupExpiredCache(); err != nil {
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cacheLogger.Error("定时清理失败: " + err.Error())
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}
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}
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}()
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}
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// StopCacheCleanup 停止缓存自动清理任务
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func StopCacheCleanup() {
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if cacheCleanupTicker != nil {
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cacheCleanupTicker.Stop()
|
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cacheLogger.Info("缓存自动清理已停止")
|
||
// 最后执行一次清理
|
||
if err := CleanupExpiredCache(); err != nil {
|
||
cacheLogger.Error("最后清理失败: " + err.Error())
|
||
}
|
||
}
|
||
}
|
||
|
||
// IncrementContentRequestCount 增加content接口访问计数
|
||
func IncrementContentRequestCount() int { return int(contentRequestCount.Add(1)) }
|
||
|
||
// ResetContentRequestCount 重置访问计数
|
||
func ResetContentRequestCount() { contentRequestCount.Store(0) }
|
||
|
||
// GetContentRequestCount 获取当前访问计数
|
||
func GetContentRequestCount() int { return int(contentRequestCount.Load()) }
|
||
|
||
// GetDatabaseStats 获取数据库统计信息
|
||
func GetDatabaseStats() (map[string]interface{}, error) {
|
||
if cacheDB == nil {
|
||
return nil, fmt.Errorf("数据库未初始化")
|
||
}
|
||
|
||
stats := make(map[string]interface{})
|
||
|
||
// 获取cache表记录数
|
||
var cacheCount int
|
||
err := cacheDB.QueryRow("SELECT COUNT(*) FROM cache").Scan(&cacheCount)
|
||
if err != nil {
|
||
cacheLogger.Warning("获取cache表记录数失败: " + err.Error())
|
||
cacheCount = 0
|
||
}
|
||
stats["cache_count"] = cacheCount
|
||
|
||
// PostgreSQL：用库大小填充，无 freelist 概念
|
||
if dbDriver == "pgx" {
|
||
var totalSize int64
|
||
if err := cacheDB.QueryRow("SELECT pg_database_size(current_database())").Scan(&totalSize); err == nil {
|
||
stats["page_count"] = int64(0)
|
||
stats["page_size"] = int64(0)
|
||
stats["freelist_count"] = int64(0)
|
||
stats["total_size_bytes"] = totalSize
|
||
stats["free_size_bytes"] = int64(0)
|
||
stats["used_size_bytes"] = totalSize
|
||
}
|
||
return stats, nil
|
||
}
|
||
|
||
// SQLite：获取数据库页面统计
|
||
var pageCount, pageSize, freelistCount int64
|
||
err = cacheDB.QueryRow("PRAGMA page_count").Scan(&pageCount)
|
||
if err == nil {
|
||
stats["page_count"] = pageCount
|
||
}
|
||
|
||
err = cacheDB.QueryRow("PRAGMA page_size").Scan(&pageSize)
|
||
if err == nil {
|
||
stats["page_size"] = pageSize
|
||
}
|
||
|
||
err = cacheDB.QueryRow("PRAGMA freelist_count").Scan(&freelistCount)
|
||
if err == nil {
|
||
stats["freelist_count"] = freelistCount
|
||
stats["total_size_bytes"] = pageCount * pageSize
|
||
stats["free_size_bytes"] = freelistCount * pageSize
|
||
stats["used_size_bytes"] = (pageCount - freelistCount) * pageSize
|
||
}
|
||
|
||
return stats, nil
|
||
}
|
||
|
||
// SaveStatistics 保存请求统计到数据库
|
||
func SaveStatistics(stats map[string]int64) error {
|
||
if cacheDB == nil {
|
||
return fmt.Errorf("数据库未初始化")
|
||
}
|
||
|
||
_, err := cacheDB.Exec(q(`
|
||
UPDATE statistics
|
||
SET total_requests = ?,
|
||
search_requests = ?,
|
||
detail_requests = ?,
|
||
catalog_requests = ?,
|
||
content_requests = ?,
|
||
manga_requests = ?,
|
||
audio_requests = ?,
|
||
video_requests = ?,
|
||
category_requests = ?,
|
||
updated_at = ?
|
||
WHERE id = 1
|
||
`), stats["total"], stats["search"], stats["detail"], stats["catalog"],
|
||
stats["content"], stats["manga"], stats["audio"], stats["video"], stats["category"],
|
||
time.Now().Unix())
|
||
|
||
if err != nil {
|
||
cacheLogger.Error("保存统计数据失败: " + err.Error())
|
||
return err
|
||
}
|
||
|
||
return nil
|
||
}
|
||
|
||
// LoadStatistics 从数据库加载请求统计
|
||
func LoadStatistics() (map[string]int64, error) {
|
||
if cacheDB == nil {
|
||
return nil, fmt.Errorf("数据库未初始化")
|
||
}
|
||
|
||
var total, search, detail, catalog, content, manga, audio, video, category int64
|
||
|
||
err := cacheDB.QueryRow(`
|
||
SELECT total_requests, search_requests, detail_requests, catalog_requests,
|
||
content_requests, manga_requests, audio_requests, video_requests, category_requests
|
||
FROM statistics WHERE id = 1
|
||
`).Scan(&total, &search, &detail, &catalog, &content, &manga, &audio, &video, &category)
|
||
|
||
if err == sql.ErrNoRows {
|
||
// 没有数据，返回空统计
|
||
return map[string]int64{
|
||
"total": 0, "search": 0, "detail": 0, "catalog": 0,
|
||
"content": 0, "manga": 0, "audio": 0, "video": 0, "category": 0,
|
||
}, nil
|
||
}
|
||
|
||
if err != nil {
|
||
cacheLogger.Error("加载统计数据失败: " + err.Error())
|
||
return nil, err
|
||
}
|
||
|
||
stats := map[string]int64{
|
||
"total": total,
|
||
"search": search,
|
||
"detail": detail,
|
||
"catalog": catalog,
|
||
"content": content,
|
||
"manga": manga,
|
||
"audio": audio,
|
||
"video": video,
|
||
"category": category,
|
||
}
|
||
|
||
return stats, nil
|
||
}
|