567 lines
17 KiB
Go
567 lines
17 KiB
Go
// Package api 提供 REST API（/api/v1）、事件推送与前端静态资源。前端只通过这套 API 访问数据。
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package api
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import (
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"encoding/json"
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"errors"
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"io"
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"io/fs"
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"log/slog"
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"mime"
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"net"
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"net/http"
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"path"
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"strings"
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"sync"
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"time"
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"rawmark/internal/auth"
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"rawmark/internal/events"
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"rawmark/internal/search"
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"rawmark/internal/store"
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"rawmark/internal/vault"
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)
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const (
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cookieName = "rawmark_session"
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maxNoteBytes = 20 << 20
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maxAssetBytes = 50 << 20
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maxJSONBytes = 1 << 20
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)
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type Server struct {
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vault *vault.Vault
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auth *auth.Manager
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store *store.Store
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hub *events.Hub
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index *search.Index
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// 串行化设置的"读取-合并-写入"
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settingsMu sync.Mutex
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// ThemesDir 指向数据目录中的主题目录；为空时只有内置主题。
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ThemesDir string
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PluginsDir string
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FontsDir string
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pluginsMu sync.Mutex
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}
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func New(v *vault.Vault, a *auth.Manager, st *store.Store, hub *events.Hub, index *search.Index) *Server {
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return &Server{vault: v, auth: a, store: st, hub: hub, index: index}
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}
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// access 为接口的访问要求
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type access int
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const (
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public access = iota
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// 登录会话或 API 令牌（只读令牌可用 GET 和只读导出接口）
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authed
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// 只允许登录会话：管理 API 令牌，避免令牌给自己扩权
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sessionOnly
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)
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type route struct {
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pattern string
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access access
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handler http.HandlerFunc
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}
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// routes 为全部接口；openapi.json 须与之一致（见 TestOpenAPICoversRoutes）
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func (s *Server) routes() []route {
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return []route{
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{"GET /api/v1/health", public, func(w http.ResponseWriter, r *http.Request) { writeJSON(w, 200, map[string]bool{"ok": true}) }},
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{"GET /api/v1/openapi.json", public, serveOpenAPI},
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{"GET /api/v1/auth/state", public, s.authState},
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{"POST /api/v1/auth/setup", public, s.setup},
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{"POST /api/v1/auth/login", public, s.login},
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{"POST /api/v1/auth/logout", public, s.logout},
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{"POST /api/v1/auth/password", sessionOnly, s.changePassword},
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{"GET /api/v1/tree", authed, s.tree},
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{"PUT /api/v1/tree-icon", authed, s.setTreeIcon},
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{"GET /api/v1/metadata", authed, s.metadata},
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{"POST /api/v1/export", authed, s.export},
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{"GET /api/v1/files/{path...}", authed, s.readFile},
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{"PUT /api/v1/files/{path...}", authed, s.writeFile},
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{"DELETE /api/v1/files/{path...}", authed, s.deleteFile},
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{"POST /api/v1/move", authed, s.move},
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{"POST /api/v1/folders", authed, s.mkdir},
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{"POST /api/v1/import", authed, s.importNotes},
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{"POST /api/v1/assets", authed, s.uploadAsset},
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{"POST /api/v1/assets/cleanup", authed, s.cleanupImages},
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{"POST /api/v1/assets/import", authed, s.importAsset},
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{"PUT /api/v1/assets/{path...}", authed, s.replaceImage},
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{"GET /api/v1/raw/{path...}", authed, s.raw},
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{"GET /api/v1/trash", authed, s.trashList},
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{"DELETE /api/v1/trash", authed, s.trashClear},
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{"POST /api/v1/trash/{id}/restore", authed, s.trashRestore},
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{"DELETE /api/v1/trash/{id}", authed, s.trashPurge},
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{"GET /api/v1/events", authed, s.events},
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{"GET /api/v1/search", authed, s.search},
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{"GET /api/v1/settings", authed, s.getSettings},
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{"PATCH /api/v1/settings", sessionOnly, s.patchSettings},
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{"GET /api/v1/fonts", sessionOnly, s.listFonts},
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{"POST /api/v1/fonts", sessionOnly, s.importFont},
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{"GET /api/v1/fonts/{id}/file", sessionOnly, s.fontFile},
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{"DELETE /api/v1/fonts/{id}", sessionOnly, s.deleteFont},
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{"GET /api/v1/plugins", sessionOnly, s.listPlugins},
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{"POST /api/v1/plugins", sessionOnly, s.installPlugin},
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{"PATCH /api/v1/plugins/{id}", sessionOnly, s.togglePlugin},
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{"DELETE /api/v1/plugins/{id}", sessionOnly, s.uninstallPlugin},
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{"GET /api/v1/plugins/{id}/assets/{revision}/{path...}", sessionOnly, s.pluginAsset},
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{"GET /api/v1/plugins/{id}/data", sessionOnly, s.getPluginData},
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{"PUT /api/v1/plugins/{id}/data", sessionOnly, s.putPluginData},
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{"GET /api/v1/themes", authed, s.listThemes},
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{"GET /api/v1/themes/{id}", authed, s.getTheme},
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{"GET /api/v1/tokens", sessionOnly, s.listTokens},
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{"POST /api/v1/tokens", sessionOnly, s.createToken},
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{"DELETE /api/v1/tokens/{id}", sessionOnly, s.deleteToken},
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}
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}
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func (s *Server) Handler(static fs.FS) http.Handler {
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mux := http.NewServeMux()
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for _, rt := range s.routes() {
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var h http.Handler = rt.handler
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switch rt.access {
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case authed:
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h = s.requireAuth(h, true)
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case sessionOnly:
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h = s.requireAuth(h, false)
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}
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mux.Handle(rt.pattern, h)
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}
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mux.HandleFunc("/api/", func(w http.ResponseWriter, r *http.Request) { writeError(w, 404, "接口不存在") })
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mux.Handle("/", newStaticHandler(static))
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return securityHeaders(sameOrigin(mux))
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}
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// ---- 中间件 ----
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func securityHeaders(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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h := w.Header()
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if strings.HasPrefix(r.URL.Path, "/api/") {
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h.Set("Cache-Control", "no-store")
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}
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h.Set("X-Content-Type-Options", "nosniff")
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h.Set("Referrer-Policy", "same-origin")
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h.Set("X-Frame-Options", "DENY")
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next.ServeHTTP(w, r)
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})
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}
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// sameOrigin 拒绝跨站的写请求（CSRF 防护的第二道防线，第一道是 SameSite=Strict Cookie）。
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// 没有 Origin 头的请求来自非浏览器客户端，放行
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func sameOrigin(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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if r.Method != http.MethodGet && r.Method != http.MethodHead {
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if origin := r.Header.Get("Origin"); origin != "" {
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if host := strings.TrimPrefix(strings.TrimPrefix(origin, "https://"), "http://"); host != r.Host {
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writeError(w, 403, "跨站请求被拒绝")
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return
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}
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}
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}
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next.ServeHTTP(w, r)
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})
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}
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// requireAuth 校验登录会话；allowToken 时也接受 Authorization: Bearer 的 API 令牌
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func (s *Server) requireAuth(next http.Handler, allowToken bool) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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if bearer, ok := strings.CutPrefix(r.Header.Get("Authorization"), "Bearer "); ok {
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if !allowToken {
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writeError(w, 403, "此接口只能在登录后使用，不接受 API 令牌")
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return
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}
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scope, valid, err := s.auth.ValidateAPIToken(strings.TrimSpace(bearer))
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if err != nil {
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internalError(w, r, err)
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return
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}
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if !valid {
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writeError(w, 401, "API 令牌无效")
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return
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}
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if scope != "write" && r.Method != http.MethodGet && r.Method != http.MethodHead && !(r.Method == http.MethodPost && r.URL.Path == "/api/v1/export") {
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writeError(w, 403, "只读令牌不能修改数据")
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return
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}
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next.ServeHTTP(w, r)
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return
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}
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c, err := r.Cookie(cookieName)
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if err != nil {
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writeError(w, 401, "未登录")
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return
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}
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ok, err := s.auth.Validate(c.Value)
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if err != nil {
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internalError(w, r, err)
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return
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}
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if !ok {
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writeError(w, 401, "登录已过期")
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return
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}
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next.ServeHTTP(w, r)
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})
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}
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// ---- 鉴权 ----
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func (s *Server) authState(w http.ResponseWriter, r *http.Request) {
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setUp, err := s.auth.IsSetUp()
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if err != nil {
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internalError(w, r, err)
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return
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}
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authed := false
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if c, err := r.Cookie(cookieName); err == nil {
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if authed, err = s.auth.Validate(c.Value); err != nil {
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internalError(w, r, err)
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return
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}
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}
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writeJSON(w, 200, map[string]bool{"setUp": setUp, "authenticated": authed})
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}
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func (s *Server) setup(w http.ResponseWriter, r *http.Request) {
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var body struct{ Password string }
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if !readJSON(w, r, &body) {
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return
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}
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switch err := s.auth.Setup(body.Password); {
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case errors.Is(err, auth.ErrWeakPassword):
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writeError(w, 400, err.Error())
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case errors.Is(err, auth.ErrAlreadySetUp):
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writeError(w, 409, err.Error())
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case err != nil:
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internalError(w, r, err)
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default:
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s.startSession(w, r, body.Password)
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}
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}
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func (s *Server) login(w http.ResponseWriter, r *http.Request) {
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var body struct{ Password string }
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if !readJSON(w, r, &body) {
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return
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}
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s.startSession(w, r, body.Password)
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}
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func (s *Server) startSession(w http.ResponseWriter, r *http.Request, password string) {
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token, err := s.auth.Login(clientIP(r), password)
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switch {
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case errors.Is(err, auth.ErrRateLimited):
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writeError(w, 429, err.Error())
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case errors.Is(err, auth.ErrBadCredentials):
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writeError(w, 401, err.Error())
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case err != nil:
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internalError(w, r, err)
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default:
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http.SetCookie(w, &http.Cookie{
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Name: cookieName,
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Value: token,
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Path: "/",
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MaxAge: int(auth.SessionTTL / time.Second),
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HttpOnly: true,
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Secure: r.TLS != nil || r.Header.Get("X-Forwarded-Proto") == "https",
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SameSite: http.SameSiteStrictMode,
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})
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writeJSON(w, 200, map[string]bool{"ok": true})
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}
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}
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func (s *Server) logout(w http.ResponseWriter, r *http.Request) {
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if c, err := r.Cookie(cookieName); err == nil {
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if err := s.auth.Logout(c.Value); err != nil {
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internalError(w, r, err)
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return
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}
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}
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http.SetCookie(w, &http.Cookie{Name: cookieName, Value: "", Path: "/", MaxAge: -1, HttpOnly: true, SameSite: http.SameSiteStrictMode})
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writeJSON(w, 200, map[string]bool{"ok": true})
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}
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// ---- 文件 ----
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func (s *Server) tree(w http.ResponseWriter, r *http.Request) {
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entries, err := s.vault.Tree()
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if err != nil {
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internalError(w, r, err)
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return
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}
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writeJSON(w, 200, map[string]any{"entries": entries})
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}
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func (s *Server) setTreeIcon(w http.ResponseWriter, r *http.Request) {
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var body struct {
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Path string `json:"path"`
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Icon json.RawMessage `json:"icon"`
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}
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if !readJSON(w, r, &body) {
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return
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}
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var icon *vault.TreeIcon
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if len(body.Icon) == 0 || json.Unmarshal(body.Icon, &icon) != nil {
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writeError(w, 400, "请求格式错误：需要 icon（null 恢复默认）")
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return
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}
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if err := s.vault.SetTreeIcon(body.Path, icon); err != nil {
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vaultError(w, r, err)
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return
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}
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s.hub.Broadcast(events.Event{Type: "tree"})
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writeJSON(w, 200, map[string]bool{"ok": true})
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}
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const searchLimit = 50
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func (s *Server) search(w http.ResponseWriter, r *http.Request) {
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results, err := s.index.Search(r.URL.Query().Get("q"), searchLimit)
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if err != nil {
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internalError(w, r, err)
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return
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}
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writeJSON(w, 200, map[string]any{"results": results})
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}
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func (s *Server) readFile(w http.ResponseWriter, r *http.Request) {
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data, rev, err := s.vault.Read(r.PathValue("path"))
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if err != nil {
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vaultError(w, r, err)
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return
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}
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w.Header().Set("Content-Type", "text/markdown; charset=utf-8")
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w.Header().Set("ETag", `"`+rev+`"`)
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w.Header().Set("Cache-Control", "no-store")
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w.Write(data)
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}
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// writeFile 以请求体整体作为笔记内容。If-Match: "rev" 要求版本一致；If-None-Match: * 要求文件不存在；都不带则直接覆盖
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func (s *Server) writeFile(w http.ResponseWriter, r *http.Request) {
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data, err := io.ReadAll(http.MaxBytesReader(w, r.Body, maxNoteBytes))
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if err != nil {
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writeError(w, 413, "笔记过大")
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return
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}
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pre := vault.Precondition{
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IfMatch: strings.Trim(r.Header.Get("If-Match"), `"`),
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IfNoneMatch: r.Header.Get("If-None-Match") == "*",
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}
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rev, err := s.vault.Write(r.PathValue("path"), data, pre)
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if err != nil {
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vaultError(w, r, err)
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return
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}
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w.Header().Set("ETag", `"`+rev+`"`)
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writeJSON(w, 200, map[string]string{"rev": rev})
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}
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func (s *Server) deleteFile(w http.ResponseWriter, r *http.Request) {
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item, err := s.vault.Delete(r.PathValue("path"))
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if err != nil {
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vaultError(w, r, err)
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return
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}
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writeJSON(w, 200, item)
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}
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func (s *Server) move(w http.ResponseWriter, r *http.Request) {
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var body struct{ From, To string }
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if !readJSON(w, r, &body) {
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return
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}
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rewritten, err := s.vault.Move(body.From, body.To)
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if err != nil {
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vaultError(w, r, err)
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return
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}
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if rewritten {
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// 原子改写替换了文件身份，监听器无法再从快照中识别这次移动。
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s.hub.Broadcast(events.Event{Type: "moved", From: body.From, Path: body.To}, events.Event{Type: "tree"})
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} else {
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// 图标提交在文件移动之后；不能仅依赖文件监听器较早的通知。
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s.hub.Broadcast(events.Event{Type: "tree"})
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}
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writeJSON(w, 200, map[string]bool{"ok": true})
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}
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func (s *Server) mkdir(w http.ResponseWriter, r *http.Request) {
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var body struct{ Path string }
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if !readJSON(w, r, &body) {
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return
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}
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if err := s.vault.Mkdir(body.Path); err != nil {
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vaultError(w, r, err)
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return
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}
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writeJSON(w, 200, map[string]bool{"ok": true})
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}
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// uploadAsset 接收 multipart 表单中的 file 字段，存入指定笔记或目录下的共享 assets 目录。
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func (s *Server) uploadAsset(w http.ResponseWriter, r *http.Request) {
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r.Body = http.MaxBytesReader(w, r.Body, maxAssetBytes+1<<20)
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file, header, err := r.FormFile("file")
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if err != nil {
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writeError(w, 400, "缺少上传文件")
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return
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}
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defer file.Close()
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var link string
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if r.URL.Query().Has("folder") {
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if r.URL.Query().Has("note") {
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writeError(w, 400, "不能同时指定笔记和文件夹")
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return
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}
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link, err = s.vault.SaveFolderAsset(r.URL.Query().Get("folder"), header.Filename, file, maxAssetBytes)
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} else {
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link, err = s.vault.SaveAsset(r.URL.Query().Get("note"), header.Filename, file, maxAssetBytes)
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}
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if err != nil {
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vaultError(w, r, err)
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return
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}
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writeJSON(w, 200, map[string]string{"link": link})
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}
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// replaceImage 仅替换已存在的图片；路径与引用保持不变。
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func (s *Server) replaceImage(w http.ResponseWriter, r *http.Request) {
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r.Body = http.MaxBytesReader(w, r.Body, maxAssetBytes+1<<20)
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if err := r.ParseMultipartForm(1 << 20); err != nil {
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var tooLarge *http.MaxBytesError
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if errors.As(err, &tooLarge) {
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writeError(w, 413, "图片不能超过 50 MB")
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} else {
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writeError(w, 400, "无法读取上传文件")
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}
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return
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}
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defer r.MultipartForm.RemoveAll()
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file, header, err := r.FormFile("file")
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if err != nil {
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writeError(w, 400, "缺少上传文件")
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return
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}
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defer file.Close()
|
||
if err := s.vault.ReplaceImage(r.PathValue("path"), header.Filename, file, maxAssetBytes); err != nil {
|
||
vaultError(w, r, err)
|
||
return
|
||
}
|
||
writeJSON(w, 200, map[string]bool{"ok": true})
|
||
}
|
||
|
||
// raw 输出仓库内任意非隐藏文件（主要是图片）。以沙箱 CSP 返回，防止 SVG/HTML 中的脚本在本站执行
|
||
func (s *Server) raw(w http.ResponseWriter, r *http.Request) {
|
||
s.serveRaw(w, r, r.PathValue("path"))
|
||
}
|
||
|
||
func (s *Server) serveRaw(w http.ResponseWriter, r *http.Request, rel string) {
|
||
f, info, err := s.vault.OpenRaw(rel)
|
||
if err != nil {
|
||
vaultError(w, r, err)
|
||
return
|
||
}
|
||
defer f.Close()
|
||
h := w.Header()
|
||
h.Set("Content-Security-Policy", "sandbox; default-src 'none'; img-src 'self' data:; style-src 'unsafe-inline'")
|
||
if ct := mime.TypeByExtension(path.Ext(info.Name())); ct != "" {
|
||
h.Set("Content-Type", ct)
|
||
}
|
||
h.Set("Cache-Control", "no-store")
|
||
http.ServeContent(w, r, info.Name(), info.ModTime(), f)
|
||
}
|
||
|
||
// ---- 回收站 ----
|
||
|
||
func (s *Server) trashList(w http.ResponseWriter, r *http.Request) {
|
||
items, err := s.vault.TrashList()
|
||
if err != nil {
|
||
internalError(w, r, err)
|
||
return
|
||
}
|
||
writeJSON(w, 200, map[string]any{"items": items})
|
||
}
|
||
|
||
func (s *Server) trashRestore(w http.ResponseWriter, r *http.Request) {
|
||
item, err := s.vault.Restore(r.PathValue("id"))
|
||
if err != nil {
|
||
vaultError(w, r, err)
|
||
return
|
||
}
|
||
s.hub.Broadcast(events.Event{Type: "tree"})
|
||
writeJSON(w, 200, item)
|
||
}
|
||
|
||
func (s *Server) trashPurge(w http.ResponseWriter, r *http.Request) {
|
||
if err := s.vault.Purge(r.PathValue("id")); err != nil {
|
||
vaultError(w, r, err)
|
||
return
|
||
}
|
||
writeJSON(w, 200, map[string]bool{"ok": true})
|
||
}
|
||
|
||
// ---- 响应工具 ----
|
||
|
||
// clientIP 返回限速用的来源地址（未经反向代理头部，避免伪造）
|
||
func clientIP(r *http.Request) string {
|
||
host, _, err := net.SplitHostPort(r.RemoteAddr)
|
||
if err != nil {
|
||
return r.RemoteAddr
|
||
}
|
||
return host
|
||
}
|
||
|
||
func readJSON(w http.ResponseWriter, r *http.Request, v any) bool {
|
||
if err := json.NewDecoder(http.MaxBytesReader(w, r.Body, maxJSONBytes)).Decode(v); err != nil {
|
||
writeError(w, 400, "请求格式错误")
|
||
return false
|
||
}
|
||
return true
|
||
}
|
||
|
||
func writeJSON(w http.ResponseWriter, status int, v any) {
|
||
w.Header().Set("Content-Type", "application/json; charset=utf-8")
|
||
w.WriteHeader(status)
|
||
json.NewEncoder(w).Encode(v)
|
||
}
|
||
|
||
func writeError(w http.ResponseWriter, status int, msg string) {
|
||
writeJSON(w, status, map[string]string{"error": msg})
|
||
}
|
||
|
||
func internalError(w http.ResponseWriter, r *http.Request, err error) {
|
||
slog.Error("请求处理失败", "method", r.Method, "path", r.URL.Path, "err", err)
|
||
writeError(w, 500, "服务器内部错误")
|
||
}
|
||
|
||
func vaultError(w http.ResponseWriter, r *http.Request, err error) {
|
||
var conflict *vault.ConflictError
|
||
switch {
|
||
case errors.As(err, &conflict):
|
||
writeJSON(w, 412, map[string]string{"error": err.Error(), "rev": conflict.Rev})
|
||
case errors.Is(err, vault.ErrInvalidPath), errors.Is(err, vault.ErrInvalidImport), errors.Is(err, vault.ErrInvalidIcon):
|
||
writeError(w, 400, err.Error())
|
||
case errors.Is(err, vault.ErrNotFound):
|
||
writeError(w, 404, err.Error())
|
||
case errors.Is(err, vault.ErrExists):
|
||
writeError(w, 409, err.Error())
|
||
case errors.Is(err, vault.ErrTooLarge):
|
||
writeError(w, 413, err.Error())
|
||
default:
|
||
internalError(w, r, err)
|
||
}
|
||
}
|
||
|
||
func (s *Server) metadata(w http.ResponseWriter, r *http.Request) {
|
||
notes, ready, err := s.index.Metadata()
|
||
if err != nil {
|
||
internalError(w, r, err)
|
||
return
|
||
}
|
||
writeJSON(w, 200, map[string]any{"notes": notes, "ready": ready})
|
||
}
|