chenxin
84bd3238ab
- 新增 /rank 免签名榜单接口（多域名容错）、/bookshelf 与 /read-history（sessionid 登录态，书架支持分组过滤） - 搜索重写：翻页透传上游 passback/search_id/next_offset/corrected_query 并按 book_id 去重，15~20 位纯数字关键词直查详情（ID 直搜） - 删除 /login/check 登录校验端点（login.go、路由与文档同步移除，sessionid 说明改为直接供书架/历史使用） - 正文链路重构：singleflight 合并同章节并发回源防击穿，缓存与解析解耦统一在出口处理，decodeContentBody 按 crypt_status 分支并兜底 500003 明文 - 缓存层：SQL 持久层 TTL 与业务 TTL 解耦（不可变内容过期后由 SQL 回填），动态短缓存只走 Redis，withCache 合并并发 miss - 密钥池：KeyTs 随正文请求上传降低密钥不匹配重试，密钥超 24 小时异步刷新并防刷新风暴，last_used_at 批量落库 - 签名补 X-Helios（与 X-Ladon 同值，对齐书源实现）；设备注册版本号统一走 ClientVersionCode/Name - 分类 landing 透传新版标签 selected_items；multi-detail 批量详情供书架/历史复用 - README 与 openapi.yaml 补充新接口文档
316 lines
9.3 KiB
Go
316 lines
9.3 KiB
Go
package fqapi
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import (
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"fanqie/internal/config"
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"fmt"
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"strings"
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"time"
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)
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// 请求日志：只记元数据（时间/IP/方法/路径/状态/耗时）与错误响应摘要，不存响应体。
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// 全量响应与正文缓存重复且体积不可控；要看重放一个请求即可。
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// RequestLogEntry 一条请求日志
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type RequestLogEntry struct {
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Ts int64 `json:"ts"`
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IP string `json:"ip"`
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Method string `json:"method"`
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Path string `json:"path"`
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Query string `json:"query"` // 解码后查询串（key 参数值已脱敏）
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Status int `json:"status"`
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DurationMs int64 `json:"duration_ms"`
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ErrorMsg string `json:"error_msg"` // 仅 status>=400 时截断保留
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UserAgent string `json:"user_agent"` // 客户端 UA，排障时区分调用方
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}
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// ErrMsgMax 错误响应摘要的最大保留字节数
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const ErrMsgMax = 4096
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const (
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reqLogChanSize = 256 // channel 满则丢弃，日志绝不阻塞请求
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reqLogFlushBatch = 50 // 攒批上限
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reqLogFlushEvery = time.Second // 兜底 flush 间隔
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reqLogCleanEvery = time.Hour // 过期清理间隔
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)
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var (
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reqLogCh chan RequestLogEntry
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reqLogQuit chan struct{}
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reqLogDone chan struct{}
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)
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// InitRequestLog 建表并启动后台落库协程（未启用时为空操作）
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func InitRequestLog() error {
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if !requestLogEnabled() {
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return nil
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}
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ddl := `CREATE TABLE IF NOT EXISTS request_log (
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id INTEGER PRIMARY KEY AUTOINCREMENT,
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ts INTEGER NOT NULL,
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ip TEXT,
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method TEXT,
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path TEXT,
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query TEXT,
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status INTEGER,
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duration_ms INTEGER,
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error_msg TEXT,
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user_agent TEXT,
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created_at INTEGER DEFAULT (strftime('%s', 'now')),
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updated_at INTEGER DEFAULT (strftime('%s', 'now'))
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)`
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if dbDriver == "pgx" {
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ddl = `CREATE TABLE IF NOT EXISTS request_log (
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id BIGSERIAL PRIMARY KEY,
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ts BIGINT NOT NULL,
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ip TEXT,
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method TEXT,
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path TEXT,
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query TEXT,
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status INTEGER,
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duration_ms BIGINT,
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error_msg TEXT,
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user_agent TEXT,
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created_at BIGINT DEFAULT extract(epoch FROM now())::bigint,
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updated_at BIGINT DEFAULT extract(epoch FROM now())::bigint
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)`
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}
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if _, err := cacheDB.Exec(ddl); err != nil {
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return fmt.Errorf("创建request_log表失败: %w", err)
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}
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// 旧表补列（表已存在时 CREATE 不会加列；PG 支持 IF NOT EXISTS，SQLite 报错即视为已存在）
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if dbDriver == "pgx" {
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for _, col := range []string{
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`ALTER TABLE request_log ADD COLUMN IF NOT EXISTS user_agent TEXT`,
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`ALTER TABLE request_log ADD COLUMN IF NOT EXISTS created_at BIGINT DEFAULT 0`,
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`ALTER TABLE request_log ADD COLUMN IF NOT EXISTS updated_at BIGINT DEFAULT 0`,
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} {
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if _, err := cacheDB.Exec(col); err != nil {
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cacheLogger.Warning("补加列失败: " + err.Error())
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}
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}
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} else {
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for _, col := range []string{
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`ALTER TABLE request_log ADD COLUMN user_agent TEXT`,
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`ALTER TABLE request_log ADD COLUMN created_at INTEGER DEFAULT 0`,
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`ALTER TABLE request_log ADD COLUMN updated_at INTEGER DEFAULT 0`,
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} {
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if _, err := cacheDB.Exec(col); err != nil {
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cacheLogger.Debug("补列跳过（已存在）: " + err.Error())
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}
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}
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}
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// append-only 日志表：旧行按 ts 回填两个时间列（幂等）
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if _, err := cacheDB.Exec(q(`UPDATE request_log SET created_at = ts, updated_at = ts WHERE created_at = 0`)); err != nil {
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cacheLogger.Warning("request_log时间列回填失败: " + err.Error())
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}
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for _, idx := range []string{
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`CREATE INDEX IF NOT EXISTS idx_request_log_ts ON request_log(ts)`,
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`CREATE INDEX IF NOT EXISTS idx_request_log_ip ON request_log(ip)`,
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`CREATE INDEX IF NOT EXISTS idx_request_log_status ON request_log(status)`,
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} {
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if _, err := cacheDB.Exec(idx); err != nil {
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cacheLogger.Warning("创建request_log索引失败: " + err.Error())
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}
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}
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reqLogCh = make(chan RequestLogEntry, reqLogChanSize)
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reqLogQuit = make(chan struct{})
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reqLogDone = make(chan struct{})
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go reqLogWorker()
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cacheLogger.Info("请求日志已启用")
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return nil
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}
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// CloseRequestLog 停止后台协程并落盘剩余日志
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func CloseRequestLog() {
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if reqLogQuit == nil {
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return
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}
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close(reqLogQuit)
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<-reqLogDone
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reqLogQuit = nil
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}
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// LogRequest 非阻塞投递一条请求日志（未启用/队列满时静默丢弃）
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func LogRequest(e RequestLogEntry) {
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if reqLogCh == nil {
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return
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}
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select {
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case reqLogCh <- e:
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default:
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}
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}
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// GetRecentRequests 查询最近 limit 条请求日志
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func GetRecentRequests(limit int) []RequestLogEntry {
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if cacheDB == nil || reqLogCh == nil {
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return nil
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}
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rows, err := cacheDB.Query(
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q("SELECT ts, ip, method, path, query, status, duration_ms, COALESCE(error_msg, ''), COALESCE(user_agent, '') FROM request_log ORDER BY id DESC LIMIT ?"), limit)
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if err != nil {
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cacheLogger.Warning("查询请求日志失败: " + err.Error())
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return nil
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}
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defer rows.Close()
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entries := make([]RequestLogEntry, 0, limit)
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for rows.Next() {
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var e RequestLogEntry
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if err := rows.Scan(&e.Ts, &e.IP, &e.Method, &e.Path, &e.Query, &e.Status, &e.DurationMs, &e.ErrorMsg, &e.UserAgent); err != nil {
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cacheLogger.Warning("读取请求日志失败: " + err.Error())
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break
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}
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entries = append(entries, e)
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}
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return entries
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}
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// DailyStat 一天的请求量统计
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type DailyStat struct {
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Day string `json:"day"` // 本地时区 MM-DD
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Count int64 `json:"count"`
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Pct int `json:"pct"` // 相对窗口峰值的百分比（进度条宽度）
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MaxCount bool `json:"max_count"` // 是否为窗口内峰值（前端高亮用）
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}
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// GetDailyRequestStats 按本地时区分天统计最近 days 天（含今天）的请求量，依赖 request_log。
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// ponytail: (ts+固定偏移)/86400 分组，DST 切换日边界误差 1 小时，趋势展示可接受
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func GetDailyRequestStats(days int) []DailyStat {
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if cacheDB == nil || reqLogCh == nil || days <= 0 {
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return nil
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}
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_, off := time.Now().Zone()
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day := func(ts int64) int64 { return (ts + int64(off)) / 86400 }
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cutoff := (day(time.Now().Unix()) - int64(days) + 1) * 86400 - int64(off)
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rows, err := cacheDB.Query(q(
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"SELECT (ts + ?) / 86400, COUNT(*) FROM request_log WHERE ts >= ? GROUP BY 1 ORDER BY 1"),
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int64(off), cutoff)
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if err != nil {
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cacheLogger.Warning("按天聚合请求量失败: " + err.Error())
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return nil
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}
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defer rows.Close()
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counts := make(map[int64]int64, days)
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var maxCount int64
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for rows.Next() {
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var d, c int64
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if err := rows.Scan(&d, &c); err != nil {
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cacheLogger.Warning("读取按天统计失败: " + err.Error())
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break
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}
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counts[d] = c
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if c > maxCount {
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maxCount = c
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}
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}
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// 补齐无请求的日期，升序返回
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stats := make([]DailyStat, 0, days)
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for i := int64(days) - 1; i >= 0; i-- {
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d := day(time.Now().Unix()) - i
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c := counts[d]
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var pct int
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if maxCount > 0 {
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pct = int(c * 100 / maxCount)
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}
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stats = append(stats, DailyStat{
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Day: time.Unix(d*86400-int64(off), 0).Format("01-02"),
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Count: c,
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Pct: pct,
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MaxCount: c > 0 && c == maxCount,
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})
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}
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return stats
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}
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// reqLogWorker 攒批落库 + 定期清理过期日志
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func reqLogWorker() {
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defer close(reqLogDone)
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batch := make([]RequestLogEntry, 0, reqLogFlushBatch)
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flush := func() {
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if len(batch) == 0 {
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return
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}
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if err := insertRequestLogs(batch); err != nil {
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cacheLogger.Warning("写入请求日志失败: " + err.Error())
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}
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batch = batch[:0]
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}
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defer flush()
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ticker := time.NewTicker(reqLogFlushEvery)
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cleanTicker := time.NewTicker(reqLogCleanEvery)
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defer ticker.Stop()
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defer cleanTicker.Stop()
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for {
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select {
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case e := <-reqLogCh:
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batch = append(batch, e)
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if len(batch) >= reqLogFlushBatch {
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flush()
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}
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case <-ticker.C:
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flush()
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case <-cleanTicker.C:
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cleanupRequestLog()
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case <-reqLogQuit:
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// 排空 channel 后退出
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for {
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select {
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case e := <-reqLogCh:
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batch = append(batch, e)
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default:
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return
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}
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}
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}
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}
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}
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// insertRequestLogs 多值 INSERT 一次往返写入整批（单条语句自带原子性）
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// ponytail: 批量上限 50 行 × 9 列 = 450 参数，远低于 SQLite(999)/PG(65535) 占位符上限
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func insertRequestLogs(batch []RequestLogEntry) error {
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var b strings.Builder
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b.WriteString("INSERT INTO request_log (ts, ip, method, path, query, status, duration_ms, error_msg, user_agent) VALUES ")
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args := make([]interface{}, 0, len(batch)*9)
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for i, e := range batch {
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if i > 0 {
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b.WriteByte(',')
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}
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b.WriteString("(?, ?, ?, ?, ?, ?, ?, ?, ?)")
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args = append(args, e.Ts, e.IP, e.Method, e.Path, e.Query, e.Status, e.DurationMs, e.ErrorMsg, e.UserAgent)
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}
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_, err := cacheDB.Exec(q(b.String()), args...)
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return err
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}
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// cleanupRequestLog 删除超过保留期的日志
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func cleanupRequestLog() {
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if !requestLogEnabled() {
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return
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}
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days := 7
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if cfg := config.GetAppConfig(); cfg != nil && cfg.Server.RequestLog.RetentionDays > 0 {
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days = cfg.Server.RequestLog.RetentionDays
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}
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cutoff := time.Now().Unix() - int64(days)*86400
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if result, err := cacheDB.Exec(q("DELETE FROM request_log WHERE ts < ?"), cutoff); err != nil {
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cacheLogger.Warning("清理请求日志失败: " + err.Error())
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} else if n, _ := result.RowsAffected(); n > 0 {
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cacheLogger.Info(fmt.Sprintf("已清理 %d 条过期请求日志（保留 %d 天）", n, days))
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}
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}
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// requestLogEnabled 配置启用且数据库可用
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func requestLogEnabled() bool {
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cfg := config.GetAppConfig()
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return cfg != nil && cfg.Server.RequestLog.Enabled && cacheDB != nil
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}
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