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// Copyright 2014 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Package webdav provides a WebDAV server implementation.
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package webdav // import "golang.org/x/net/webdav"
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import (
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"context"
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"errors"
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"fmt"
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"net/http"
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"net/url"
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"path"
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"strconv"
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"strings"
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"sync"
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"time"
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model "github.com/cloudreve/Cloudreve/v3/models"
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"github.com/cloudreve/Cloudreve/v3/pkg/filesystem"
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"github.com/cloudreve/Cloudreve/v3/pkg/filesystem/fsctx"
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"github.com/cloudreve/Cloudreve/v3/pkg/util"
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)
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type Handler struct {
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// Prefix is the URL path prefix to strip from WebDAV resource paths.
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Prefix string
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// LockSystem is the lock management system.
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LockSystem map[uint]LockSystem
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// Logger is an optional error logger. If non-nil, it will be called
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// for all HTTP requests.
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Logger func(*http.Request, error)
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Mutex *sync.Mutex
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}
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func (h *Handler) stripPrefix(p string, uid uint) (string, int, error) {
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if h.Prefix == "" {
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return p, http.StatusOK, nil
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}
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prefix := h.Prefix
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if r := strings.TrimPrefix(p, prefix); len(r) < len(p) {
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if len(r) == 0 {
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r = "/"
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}
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return util.RemoveSlash(r), http.StatusOK, nil
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}
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return p, http.StatusNotFound, errPrefixMismatch
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}
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// isPathExist 路径是否存在
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func isPathExist(ctx context.Context, fs *filesystem.FileSystem, path string) (bool, FileInfo) {
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// 尝试目录
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if ok, folder := fs.IsPathExist(path); ok {
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return ok, folder
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}
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if ok, file := fs.IsFileExist(path); ok {
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return ok, file
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}
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return false, nil
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}
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func (h *Handler) ServeHTTP(w http.ResponseWriter, r *http.Request, fs *filesystem.FileSystem) {
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status, err := http.StatusBadRequest, errUnsupportedMethod
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h.Mutex.Lock()
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if h.LockSystem == nil {
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h.Mutex.Unlock()
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status, err = http.StatusInternalServerError, errNoLockSystem
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} else {
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// 检查并新建 LockSystem
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ls, ok := h.LockSystem[fs.User.ID]
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if !ok {
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h.LockSystem[fs.User.ID] = NewMemLS()
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ls = h.LockSystem[fs.User.ID]
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}
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h.Mutex.Unlock()
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switch r.Method {
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case "OPTIONS":
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status, err = h.handleOptions(w, r, fs)
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case "GET", "HEAD", "POST":
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status, err = h.handleGetHeadPost(w, r, fs)
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case "DELETE":
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status, err = h.handleDelete(w, r, fs)
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case "PUT":
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status, err = h.handlePut(w, r, fs)
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case "MKCOL":
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status, err = h.handleMkcol(w, r, fs)
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case "COPY", "MOVE":
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status, err = h.handleCopyMove(w, r, fs)
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case "LOCK":
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status, err = h.handleLock(w, r, fs, ls)
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case "UNLOCK":
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status, err = h.handleUnlock(w, r, fs, ls)
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case "PROPFIND":
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status, err = h.handlePropfind(w, r, fs, ls)
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case "PROPPATCH":
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status, err = h.handleProppatch(w, r, fs, ls)
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}
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}
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if status != 0 {
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w.WriteHeader(status)
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if status != http.StatusNoContent {
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w.Write([]byte(StatusText(status)))
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}
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}
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if h.Logger != nil {
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h.Logger(r, err)
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}
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}
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// OK
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func (h *Handler) lock(now time.Time, root string, fs *filesystem.FileSystem, ls LockSystem) (token string, status int, err error) {
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//token, err = ls.Create(now, LockDetails{
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// Root: root,
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// Duration: infiniteTimeout,
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// ZeroDepth: true,
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//})
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//if err != nil {
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// if err == ErrLocked {
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// return "", StatusLocked, err
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// }
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// return "", http.StatusInternalServerError, err
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//}
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return fmt.Sprintf("%d", time.Now().Unix()), 0, nil
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}
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// ok
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func (h *Handler) confirmLocks(r *http.Request, src, dst string, fs *filesystem.FileSystem) (release func(), status int, err error) {
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//hdr := r.Header.Get("If")
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//h.Mutex.Lock()
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//ls,ok := h.LockSystem[fs.User.ID]
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//h.Mutex.Unlock()
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//if !ok{
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// return nil, http.StatusInternalServerError, errNoLockSystem
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//}
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//
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//if hdr == "" {
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// // An empty If header means that the client hasn't previously created locks.
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// // Even if this client doesn't care about locks, we still need to check that
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// // the resources aren't locked by another client, so we create temporary
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// // locks that would conflict with another client's locks. These temporary
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// // locks are unlocked at the end of the HTTP request.
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// now, srcToken, dstToken := time.Now(), "", ""
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// if src != "" {
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// srcToken, status, err = h.lock(now, src, fs,ls)
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// if err != nil {
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// return nil, status, err
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// }
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// }
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// if dst != "" {
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// dstToken, status, err = h.lock(now, dst, fs,ls)
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// if err != nil {
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// if srcToken != "" {
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// ls.Unlock(now, srcToken)
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// }
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// return nil, status, err
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// }
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// }
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//
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// return func() {
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// if dstToken != "" {
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// ls.Unlock(now, dstToken)
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// }
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// if srcToken != "" {
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// ls.Unlock(now, srcToken)
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// }
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// }, 0, nil
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//}
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//
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//ih, ok := parseIfHeader(hdr)
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//if !ok {
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// return nil, http.StatusBadRequest, errInvalidIfHeader
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//}
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//// ih is a disjunction (OR) of ifLists, so any ifList will do.
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//for _, l := range ih.lists {
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// lsrc := l.resourceTag
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// if lsrc == "" {
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// lsrc = src
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// } else {
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// u, err := url.Parse(lsrc)
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// if err != nil {
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// continue
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// }
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// //if u.Host != r.Host {
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// // continue
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// //}
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// lsrc, status, err = h.stripPrefix(u.Path, fs.User.ID)
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// if err != nil {
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// return nil, status, err
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// }
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// }
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// release, err = ls.Confirm(
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// time.Now(),
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// lsrc,
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// dst,
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// l.conditions...,
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// )
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// if err == ErrConfirmationFailed {
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// continue
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// }
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// if err != nil {
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// return nil, http.StatusInternalServerError, err
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// }
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// return release, 0, nil
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//}
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//// Section 10.4.1 says that "If this header is evaluated and all state lists
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//// fail, then the request must fail with a 412 (Precondition Failed) status."
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//// We follow the spec even though the cond_put_corrupt_token test case from
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//// the litmus test warns on seeing a 412 instead of a 423 (Locked).
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//return nil, http.StatusPreconditionFailed, ErrLocked
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return func() {
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}, 0, nil
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}
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// OK
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func (h *Handler) handleOptions(w http.ResponseWriter, r *http.Request, fs *filesystem.FileSystem) (status int, err error) {
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reqPath, status, err := h.stripPrefix(r.URL.Path, fs.User.ID)
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if err != nil {
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return status, err
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}
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ctx := r.Context()
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allow := "OPTIONS, LOCK, PUT, MKCOL"
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if exist, fi := isPathExist(ctx, fs, reqPath); exist {
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if fi.IsDir() {
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allow = "OPTIONS, LOCK, DELETE, PROPPATCH, COPY, MOVE, UNLOCK, PROPFIND"
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} else {
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allow = "OPTIONS, LOCK, GET, HEAD, POST, DELETE, PROPPATCH, COPY, MOVE, UNLOCK, PROPFIND, PUT"
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}
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}
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w.Header().Set("Allow", allow)
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// http://www.webdav.org/specs/rfc4918.html#dav.compliance.classes
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w.Header().Set("DAV", "1, 2")
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// http://msdn.microsoft.com/en-au/library/cc250217.aspx
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w.Header().Set("MS-Author-Via", "DAV")
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return 0, nil
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}
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// OK
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func (h *Handler) handleGetHeadPost(w http.ResponseWriter, r *http.Request, fs *filesystem.FileSystem) (status int, err error) {
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defer fs.Recycle()
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reqPath, status, err := h.stripPrefix(r.URL.Path, fs.User.ID)
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if err != nil {
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return status, err
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}
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ctx := r.Context()
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exist, file := fs.IsFileExist(reqPath)
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if !exist {
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return http.StatusNotFound, nil
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}
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fs.SetTargetFile(&[]model.File{*file})
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rs, err := fs.Preview(ctx, 0, false)
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if err != nil {
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if err == filesystem.ErrObjectNotExist {
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return http.StatusNotFound, err
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}
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return http.StatusInternalServerError, err
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}
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etag, err := findETag(ctx, fs, nil, reqPath, &fs.FileTarget[0])
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if err != nil {
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return http.StatusInternalServerError, err
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}
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w.Header().Set("ETag", etag)
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if !rs.Redirect {
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defer rs.Content.Close()
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// 获取文件内容
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http.ServeContent(w, r, reqPath, fs.FileTarget[0].UpdatedAt, rs.Content)
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return 0, nil
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}
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http.Redirect(w, r, rs.URL, 301)
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return 0, nil
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}
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// OK
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func (h *Handler) handleDelete(w http.ResponseWriter, r *http.Request, fs *filesystem.FileSystem) (status int, err error) {
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defer fs.Recycle()
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reqPath, status, err := h.stripPrefix(r.URL.Path, fs.User.ID)
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if err != nil {
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return status, err
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}
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release, status, err := h.confirmLocks(r, reqPath, "", fs)
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if err != nil {
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return status, err
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}
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defer release()
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ctx := r.Context()
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// 尝试作为文件删除
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if ok, file := fs.IsFileExist(reqPath); ok {
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if err := fs.Delete(ctx, []uint{}, []uint{file.ID}, false, false); err != nil {
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return http.StatusMethodNotAllowed, err
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}
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return http.StatusNoContent, nil
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}
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// 尝试作为目录删除
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if ok, folder := fs.IsPathExist(reqPath); ok {
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if err := fs.Delete(ctx, []uint{folder.ID}, []uint{}, false, false); err != nil {
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return http.StatusMethodNotAllowed, err
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}
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return http.StatusNoContent, nil
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}
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return http.StatusNotFound, nil
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}
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// OK
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func (h *Handler) handlePut(w http.ResponseWriter, r *http.Request, fs *filesystem.FileSystem) (status int, err error) {
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reqPath, status, err := h.stripPrefix(r.URL.Path, fs.User.ID)
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if err != nil {
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return status, err
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}
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release, status, err := h.confirmLocks(r, reqPath, "", fs)
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if err != nil {
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return status, err
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}
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defer release()
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// TODO(rost): Support the If-Match, If-None-Match headers? See bradfitz'
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// comments in http.checkEtag.
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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ctx = context.WithValue(ctx, fsctx.HTTPCtx, r.Context())
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ctx = context.WithValue(ctx, fsctx.CancelFuncCtx, cancel)
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fileSize, err := strconv.ParseUint(r.Header.Get("Content-Length"), 10, 64)
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if err != nil {
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return http.StatusMethodNotAllowed, err
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}
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fileName := path.Base(reqPath)
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filePath := path.Dir(reqPath)
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fileData := fsctx.FileStream{
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MIMEType: r.Header.Get("Content-Type"),
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File: r.Body,
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Size: fileSize,
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Name: fileName,
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VirtualPath: filePath,
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}
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// 判断文件是否已存在
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exist, originFile := fs.IsFileExist(reqPath)
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if exist {
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// 已存在，为更新操作
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// 检查此文件是否有软链接
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fileList, err := model.RemoveFilesWithSoftLinks([]model.File{*originFile})
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if err == nil && len(fileList) == 0 {
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// 如果包含软连接，应重新生成新文件副本，并更新source_name
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originFile.SourceName = fs.GenerateSavePath(ctx, &fileData)
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fileData.Mode &= ^fsctx.Overwrite
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fs.Use("AfterUpload", filesystem.HookUpdateSourceName)
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fs.Use("AfterUploadCanceled", filesystem.HookUpdateSourceName)
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fs.Use("AfterValidateFailed", filesystem.HookUpdateSourceName)
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}
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fs.Use("BeforeUpload", filesystem.HookResetPolicy)
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fs.Use("BeforeUpload", filesystem.HookValidateFile)
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fs.Use("BeforeUpload", filesystem.HookValidateCapacityDiff)
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fs.Use("AfterUploadCanceled", filesystem.HookCleanFileContent)
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fs.Use("AfterUploadCanceled", filesystem.HookClearFileSize)
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fs.Use("AfterUploadCanceled", filesystem.HookCancelContext)
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fs.Use("AfterUpload", filesystem.GenericAfterUpdate)
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fs.Use("AfterValidateFailed", filesystem.HookCleanFileContent)
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fs.Use("AfterValidateFailed", filesystem.HookClearFileSize)
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ctx = context.WithValue(ctx, fsctx.FileModelCtx, *originFile)
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fileData.Mode |= fsctx.Overwrite
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} else {
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// 给文件系统分配钩子
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fs.Use("BeforeUpload", filesystem.HookValidateFile)
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fs.Use("BeforeUpload", filesystem.HookValidateCapacity)
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fs.Use("AfterUploadCanceled", filesystem.HookDeleteTempFile)
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fs.Use("AfterUploadCanceled", filesystem.HookCancelContext)
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fs.Use("AfterUpload", filesystem.GenericAfterUpload)
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fs.Use("AfterUpload", filesystem.HookGenerateThumb)
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fs.Use("AfterValidateFailed", filesystem.HookDeleteTempFile)
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}
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// 执行上传
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err = fs.Upload(ctx, &fileData)
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if err != nil {
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return http.StatusMethodNotAllowed, err
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}
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etag, err := findETag(ctx, fs, nil, reqPath, fileData.Model.(*model.File))
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if err != nil {
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return http.StatusInternalServerError, err
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}
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w.Header().Set("ETag", etag)
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return http.StatusCreated, nil
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}
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// OK
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func (h *Handler) handleMkcol(w http.ResponseWriter, r *http.Request, fs *filesystem.FileSystem) (status int, err error) {
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defer fs.Recycle()
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reqPath, status, err := h.stripPrefix(r.URL.Path, fs.User.ID)
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if err != nil {
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return status, err
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}
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release, status, err := h.confirmLocks(r, reqPath, "", fs)
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if err != nil {
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return status, err
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}
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defer release()
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ctx := r.Context()
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if r.ContentLength > 0 {
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|
|
return http.StatusUnsupportedMediaType, nil
|
|
|
}
|
|
|
|
|
|
if _, err := fs.CreateDirectory(ctx, reqPath); err != nil {
|
|
|
return http.StatusConflict, err
|
|
|
}
|
|
|
return http.StatusCreated, nil
|
|
|
}
|
|
|
|
|
|
// OK
|
|
|
func (h *Handler) handleCopyMove(w http.ResponseWriter, r *http.Request, fs *filesystem.FileSystem) (status int, err error) {
|
|
|
defer fs.Recycle()
|
|
|
|
|
|
hdr := r.Header.Get("Destination")
|
|
|
if hdr == "" {
|
|
|
return http.StatusBadRequest, errInvalidDestination
|
|
|
}
|
|
|
u, err := url.Parse(hdr)
|
|
|
if err != nil {
|
|
|
return http.StatusBadRequest, errInvalidDestination
|
|
|
}
|
|
|
//if u.Host != "" && u.Host != r.Host {
|
|
|
// return http.StatusBadGateway, errInvalidDestination
|
|
|
//}
|
|
|
|
|
|
src, status, err := h.stripPrefix(r.URL.Path, fs.User.ID)
|
|
|
if err != nil {
|
|
|
return status, err
|
|
|
}
|
|
|
|
|
|
dst, status, err := h.stripPrefix(u.Path, fs.User.ID)
|
|
|
if err != nil {
|
|
|
return status, err
|
|
|
}
|
|
|
|
|
|
if dst == "" {
|
|
|
return http.StatusBadGateway, errInvalidDestination
|
|
|
}
|
|
|
if dst == src {
|
|
|
return http.StatusForbidden, errDestinationEqualsSource
|
|
|
}
|
|
|
|
|
|
ctx := r.Context()
|
|
|
|
|
|
isExist, target := isPathExist(ctx, fs, src)
|
|
|
|
|
|
if !isExist {
|
|
|
return http.StatusNotFound, nil
|
|
|
}
|
|
|
|
|
|
if r.Method == "COPY" {
|
|
|
// Section 7.5.1 says that a COPY only needs to lock the destination,
|
|
|
// not both destination and source. Strictly speaking, this is racy,
|
|
|
// even though a COPY doesn't modify the source, if a concurrent
|
|
|
// operation modifies the source. However, the litmus test explicitly
|
|
|
// checks that COPYing a locked-by-another source is OK.
|
|
|
release, status, err := h.confirmLocks(r, "", dst, fs)
|
|
|
if err != nil {
|
|
|
return status, err
|
|
|
}
|
|
|
defer release()
|
|
|
|
|
|
// Section 9.8.3 says that "The COPY method on a collection without a Depth
|
|
|
// header must act as if a Depth header with value "infinity" was included".
|
|
|
depth := infiniteDepth
|
|
|
if hdr := r.Header.Get("Depth"); hdr != "" {
|
|
|
depth = parseDepth(hdr)
|
|
|
if depth != 0 && depth != infiniteDepth {
|
|
|
// Section 9.8.3 says that "A client may submit a Depth header on a
|
|
|
// COPY on a collection with a value of "0" or "infinity"."
|
|
|
return http.StatusBadRequest, errInvalidDepth
|
|
|
}
|
|
|
}
|
|
|
return copyFiles(ctx, fs, target, dst, r.Header.Get("Overwrite") != "F", depth, 0)
|
|
|
}
|
|
|
|
|
|
// windows下，某些情况下（网盘根目录下）Office保存文件时附带的锁token只包含源文件，
|
|
|
// 此处暂时去除了对dst锁的检查
|
|
|
release, status, err := h.confirmLocks(r, src, "", fs)
|
|
|
if err != nil {
|
|
|
return status, err
|
|
|
}
|
|
|
defer release()
|
|
|
|
|
|
// Section 9.9.2 says that "The MOVE method on a collection must act as if
|
|
|
// a "Depth: infinity" header was used on it. A client must not submit a
|
|
|
// Depth header on a MOVE on a collection with any value but "infinity"."
|
|
|
if hdr := r.Header.Get("Depth"); hdr != "" {
|
|
|
if parseDepth(hdr) != infiniteDepth {
|
|
|
return http.StatusBadRequest, errInvalidDepth
|
|
|
}
|
|
|
}
|
|
|
return moveFiles(ctx, fs, target, dst, r.Header.Get("Overwrite") == "T")
|
|
|
}
|
|
|
|
|
|
// OK
|
|
|
func (h *Handler) handleLock(w http.ResponseWriter, r *http.Request, fs *filesystem.FileSystem, ls LockSystem) (retStatus int, retErr error) {
|
|
|
defer fs.Recycle()
|
|
|
|
|
|
duration, err := parseTimeout(r.Header.Get("Timeout"))
|
|
|
if err != nil {
|
|
|
return http.StatusBadRequest, err
|
|
|
}
|
|
|
|
|
|
reqPath, status, err := h.stripPrefix(r.URL.Path, fs.User.ID)
|
|
|
if err != nil {
|
|
|
return status, err
|
|
|
}
|
|
|
|
|
|
////ctx := r.Context()
|
|
|
//token, ld, now, created := "", LockDetails{}, time.Now(), false
|
|
|
//if li == (lockInfo{}) {
|
|
|
// // An empty lockInfo means to refresh the lock.
|
|
|
// ih, ok := parseIfHeader(r.Header.Get("If"))
|
|
|
// if !ok {
|
|
|
// return http.StatusBadRequest, errInvalidIfHeader
|
|
|
// }
|
|
|
// if len(ih.lists) == 1 && len(ih.lists[0].conditions) == 1 {
|
|
|
// token = ih.lists[0].conditions[0].Token
|
|
|
// }
|
|
|
// if token == "" {
|
|
|
// return http.StatusBadRequest, errInvalidLockToken
|
|
|
// }
|
|
|
// ld, err = ls.Refresh(now, token, duration)
|
|
|
// if err != nil {
|
|
|
// if err == ErrNoSuchLock {
|
|
|
// return http.StatusPreconditionFailed, err
|
|
|
// }
|
|
|
// return http.StatusInternalServerError, err
|
|
|
// }
|
|
|
//
|
|
|
//} else {
|
|
|
// // Section 9.10.3 says that "If no Depth header is submitted on a LOCK request,
|
|
|
// // then the request MUST act as if a "Depth:infinity" had been submitted."
|
|
|
// depth := infiniteDepth
|
|
|
// if hdr := r.Header.Get("Depth"); hdr != "" {
|
|
|
// depth = parseDepth(hdr)
|
|
|
// if depth != 0 && depth != infiniteDepth {
|
|
|
// // Section 9.10.3 says that "Values other than 0 or infinity must not be
|
|
|
// // used with the Depth header on a LOCK method".
|
|
|
// return http.StatusBadRequest, errInvalidDepth
|
|
|
// }
|
|
|
// }
|
|
|
// reqPath, status, err := h.stripPrefix(r.URL.Path, fs.User.ID)
|
|
|
// if err != nil {
|
|
|
// return status, err
|
|
|
// }
|
|
|
// ld = LockDetails{
|
|
|
// Root: reqPath,
|
|
|
// Duration: duration,
|
|
|
// OwnerXML: li.Owner.InnerXML,
|
|
|
// ZeroDepth: depth == 0,
|
|
|
// }
|
|
|
// token, err = ls.Create(now, ld)
|
|
|
// if err != nil {
|
|
|
// if err == ErrLocked {
|
|
|
// return StatusLocked, err
|
|
|
// }
|
|
|
// return http.StatusInternalServerError, err
|
|
|
// }
|
|
|
// defer func() {
|
|
|
// if retErr != nil {
|
|
|
// ls.Unlock(now, token)
|
|
|
// }
|
|
|
// }()
|
|
|
//
|
|
|
// // Create the resource if it didn't previously exist.
|
|
|
// //if _, err := h.FileSystem.Stat(ctx, reqPath); err != nil {
|
|
|
// // f, err := h.FileSystem.OpenFile(ctx, reqPath, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0666)
|
|
|
// // if err != nil {
|
|
|
// // // TODO: detect missing intermediate dirs and return http.StatusConflict?
|
|
|
// // return http.StatusInternalServerError, err
|
|
|
// // }
|
|
|
// // f.Close()
|
|
|
// // created = true
|
|
|
// //}
|
|
|
//
|
|
|
// // http://www.webdav.org/specs/rfc4918.html#HEADER_Lock-Token says that the
|
|
|
// // Lock-Token value is a Coded-URL. We add angle brackets.
|
|
|
// w.Header().Set("Lock-Token", "<"+token+">")
|
|
|
//}
|
|
|
//
|
|
|
//w.Header().Set("Content-Type", "application/xml; charset=utf-8")
|
|
|
//if created {
|
|
|
// // This is "w.WriteHeader(http.StatusCreated)" and not "return
|
|
|
// // http.StatusCreated, nil" because we write our own (XML) response to w
|
|
|
// // and Handler.ServeHTTP would otherwise write "Created".
|
|
|
// w.WriteHeader(http.StatusCreated)
|
|
|
//}
|
|
|
|
|
|
writeLockInfo(w, fmt.Sprintf("%d", time.Now().UnixNano()), LockDetails{
|
|
|
Duration: duration,
|
|
|
OwnerXML: fs.User.Email,
|
|
|
Root: reqPath,
|
|
|
})
|
|
|
return 0, nil
|
|
|
}
|
|
|
|
|
|
// OK
|
|
|
func (h *Handler) handleUnlock(w http.ResponseWriter, r *http.Request, fs *filesystem.FileSystem, ls LockSystem) (status int, err error) {
|
|
|
defer fs.Recycle()
|
|
|
return http.StatusNoContent, err
|
|
|
|
|
|
//// http://www.webdav.org/specs/rfc4918.html#HEADER_Lock-Token says that the
|
|
|
//// Lock-Token value is a Coded-URL. We strip its angle brackets.
|
|
|
//t := r.Header.Get("Lock-Token")
|
|
|
//if len(t) < 2 || t[0] != '<' || t[len(t)-1] != '>' {
|
|
|
// return http.StatusBadRequest, errInvalidLockToken
|
|
|
//}
|
|
|
//t = t[1 : len(t)-1]
|
|
|
//
|
|
|
//switch err = ls.Unlock(time.Now(), t); err {
|
|
|
//case nil:
|
|
|
// return http.StatusNoContent, err
|
|
|
//case ErrForbidden:
|
|
|
// return http.StatusForbidden, err
|
|
|
//case ErrLocked:
|
|
|
// return StatusLocked, err
|
|
|
//case ErrNoSuchLock:
|
|
|
// return http.StatusConflict, err
|
|
|
//default:
|
|
|
// return http.StatusInternalServerError, err
|
|
|
//}
|
|
|
}
|
|
|
|
|
|
// OK
|
|
|
func (h *Handler) handlePropfind(w http.ResponseWriter, r *http.Request, fs *filesystem.FileSystem, ls LockSystem) (status int, err error) {
|
|
|
defer fs.Recycle()
|
|
|
|
|
|
reqPath, status, err := h.stripPrefix(r.URL.Path, fs.User.ID)
|
|
|
if err != nil {
|
|
|
return status, err
|
|
|
}
|
|
|
ctx := r.Context()
|
|
|
ok, fi := isPathExist(ctx, fs, reqPath)
|
|
|
if !ok {
|
|
|
return http.StatusNotFound, err
|
|
|
}
|
|
|
|
|
|
depth := infiniteDepth
|
|
|
if hdr := r.Header.Get("Depth"); hdr != "" {
|
|
|
depth = parseDepth(hdr)
|
|
|
if depth == invalidDepth {
|
|
|
return http.StatusBadRequest, errInvalidDepth
|
|
|
}
|
|
|
}
|
|
|
pf, status, err := readPropfind(r.Body)
|
|
|
if err != nil {
|
|
|
return status, err
|
|
|
}
|
|
|
|
|
|
mw := multistatusWriter{w: w}
|
|
|
|
|
|
walkFn := func(reqPath string, info FileInfo, err error) error {
|
|
|
|
|
|
if err != nil {
|
|
|
return err
|
|
|
}
|
|
|
var pstats []Propstat
|
|
|
if pf.Propname != nil {
|
|
|
pnames, err := propnames(ctx, fs, ls, info)
|
|
|
if err != nil {
|
|
|
return err
|
|
|
}
|
|
|
pstat := Propstat{Status: http.StatusOK}
|
|
|
for _, xmlname := range pnames {
|
|
|
pstat.Props = append(pstat.Props, Property{XMLName: xmlname})
|
|
|
}
|
|
|
pstats = append(pstats, pstat)
|
|
|
} else if pf.Allprop != nil {
|
|
|
pstats, err = allprop(ctx, fs, ls, info, pf.Prop)
|
|
|
} else {
|
|
|
pstats, err = props(ctx, fs, ls, info, pf.Prop)
|
|
|
}
|
|
|
if err != nil {
|
|
|
return err
|
|
|
}
|
|
|
href := path.Join(h.Prefix, reqPath)
|
|
|
if href != "/" && info.IsDir() {
|
|
|
href += "/"
|
|
|
}
|
|
|
return mw.write(makePropstatResponse(href, pstats))
|
|
|
}
|
|
|
|
|
|
walkErr := walkFS(ctx, fs, depth, reqPath, fi, walkFn)
|
|
|
closeErr := mw.close()
|
|
|
if walkErr != nil {
|
|
|
return http.StatusInternalServerError, walkErr
|
|
|
}
|
|
|
if closeErr != nil {
|
|
|
return http.StatusInternalServerError, closeErr
|
|
|
}
|
|
|
return 0, nil
|
|
|
}
|
|
|
|
|
|
func (h *Handler) handleProppatch(w http.ResponseWriter, r *http.Request, fs *filesystem.FileSystem, ls LockSystem) (status int, err error) {
|
|
|
defer fs.Recycle()
|
|
|
|
|
|
reqPath, status, err := h.stripPrefix(r.URL.Path, fs.User.ID)
|
|
|
if err != nil {
|
|
|
return status, err
|
|
|
}
|
|
|
release, status, err := h.confirmLocks(r, reqPath, "", fs)
|
|
|
if err != nil {
|
|
|
return status, err
|
|
|
}
|
|
|
defer release()
|
|
|
|
|
|
ctx := r.Context()
|
|
|
|
|
|
if exist, _ := isPathExist(ctx, fs, reqPath); !exist {
|
|
|
return http.StatusNotFound, nil
|
|
|
}
|
|
|
patches, status, err := readProppatch(r.Body)
|
|
|
if err != nil {
|
|
|
return status, err
|
|
|
}
|
|
|
pstats, err := patch(ctx, fs, ls, reqPath, patches)
|
|
|
if err != nil {
|
|
|
return http.StatusInternalServerError, err
|
|
|
}
|
|
|
mw := multistatusWriter{w: w}
|
|
|
writeErr := mw.write(makePropstatResponse(r.URL.Path, pstats))
|
|
|
closeErr := mw.close()
|
|
|
if writeErr != nil {
|
|
|
return http.StatusInternalServerError, writeErr
|
|
|
}
|
|
|
if closeErr != nil {
|
|
|
return http.StatusInternalServerError, closeErr
|
|
|
}
|
|
|
return 0, nil
|
|
|
}
|
|
|
|
|
|
func makePropstatResponse(href string, pstats []Propstat) *response {
|
|
|
resp := response{
|
|
|
Href: []string{(&url.URL{Path: href}).EscapedPath()},
|
|
|
Propstat: make([]propstat, 0, len(pstats)),
|
|
|
}
|
|
|
for _, p := range pstats {
|
|
|
var xmlErr *xmlError
|
|
|
if p.XMLError != "" {
|
|
|
xmlErr = &xmlError{InnerXML: []byte(p.XMLError)}
|
|
|
}
|
|
|
resp.Propstat = append(resp.Propstat, propstat{
|
|
|
Status: fmt.Sprintf("HTTP/1.1 %d %s", p.Status, StatusText(p.Status)),
|
|
|
Prop: p.Props,
|
|
|
ResponseDescription: p.ResponseDescription,
|
|
|
Error: xmlErr,
|
|
|
})
|
|
|
}
|
|
|
return &resp
|
|
|
}
|
|
|
|
|
|
const (
|
|
|
infiniteDepth = -1
|
|
|
invalidDepth = -2
|
|
|
)
|
|
|
|
|
|
// parseDepth maps the strings "0", "1" and "infinity" to 0, 1 and
|
|
|
// infiniteDepth. Parsing any other string returns invalidDepth.
|
|
|
//
|
|
|
// Different WebDAV methods have further constraints on valid depths:
|
|
|
// - PROPFIND has no further restrictions, as per section 9.1.
|
|
|
// - COPY accepts only "0" or "infinity", as per section 9.8.3.
|
|
|
// - MOVE accepts only "infinity", as per section 9.9.2.
|
|
|
// - LOCK accepts only "0" or "infinity", as per section 9.10.3.
|
|
|
//
|
|
|
// These constraints are enforced by the handleXxx methods.
|
|
|
func parseDepth(s string) int {
|
|
|
switch s {
|
|
|
case "0":
|
|
|
return 0
|
|
|
case "1":
|
|
|
return 1
|
|
|
case "infinity":
|
|
|
return infiniteDepth
|
|
|
}
|
|
|
return invalidDepth
|
|
|
}
|
|
|
|
|
|
// http://www.webdav.org/specs/rfc4918.html#status.code.extensions.to.http11
|
|
|
const (
|
|
|
StatusMulti = 207
|
|
|
StatusUnprocessableEntity = 422
|
|
|
StatusLocked = 423
|
|
|
StatusFailedDependency = 424
|
|
|
StatusInsufficientStorage = 507
|
|
|
)
|
|
|
|
|
|
func StatusText(code int) string {
|
|
|
switch code {
|
|
|
case StatusMulti:
|
|
|
return "Multi-Status"
|
|
|
case StatusUnprocessableEntity:
|
|
|
return "Unprocessable Entity"
|
|
|
case StatusLocked:
|
|
|
return "Locked"
|
|
|
case StatusFailedDependency:
|
|
|
return "Failed Dependency"
|
|
|
case StatusInsufficientStorage:
|
|
|
return "Insufficient Storage"
|
|
|
}
|
|
|
return http.StatusText(code)
|
|
|
}
|
|
|
|
|
|
var (
|
|
|
errDestinationEqualsSource = errors.New("webdav: destination equals source")
|
|
|
errDirectoryNotEmpty = errors.New("webdav: directory not empty")
|
|
|
errInvalidDepth = errors.New("webdav: invalid depth")
|
|
|
errInvalidDestination = errors.New("webdav: invalid destination")
|
|
|
errInvalidIfHeader = errors.New("webdav: invalid If header")
|
|
|
errInvalidLockInfo = errors.New("webdav: invalid lock info")
|
|
|
errInvalidLockToken = errors.New("webdav: invalid lock token")
|
|
|
errInvalidPropfind = errors.New("webdav: invalid propfind")
|
|
|
errInvalidProppatch = errors.New("webdav: invalid proppatch")
|
|
|
errInvalidResponse = errors.New("webdav: invalid response")
|
|
|
errInvalidTimeout = errors.New("webdav: invalid timeout")
|
|
|
errNoFileSystem = errors.New("webdav: no file system")
|
|
|
errNoLockSystem = errors.New("webdav: no lock system")
|
|
|
errNotADirectory = errors.New("webdav: not a directory")
|
|
|
errPrefixMismatch = errors.New("webdav: prefix mismatch")
|
|
|
errRecursionTooDeep = errors.New("webdav: recursion too deep")
|
|
|
errUnsupportedLockInfo = errors.New("webdav: unsupported lock info")
|
|
|
errUnsupportedMethod = errors.New("webdav: unsupported method")
|
|
|
)
|
