From 14bb08c1df8db9ec6c8a05520d4eee67971235d9 Mon Sep 17 00:00:00 2001 From: Dimitri Sokolyuk Date: Thu, 27 Sep 2018 20:03:23 +0200 Subject: mod tidy --- vendor/golang.org/x/net/webdav/webdav.go | 702 ------------------------------- 1 file changed, 702 deletions(-) delete mode 100644 vendor/golang.org/x/net/webdav/webdav.go (limited to 'vendor/golang.org/x/net/webdav/webdav.go') diff --git a/vendor/golang.org/x/net/webdav/webdav.go b/vendor/golang.org/x/net/webdav/webdav.go deleted file mode 100644 index 7b56687..0000000 --- a/vendor/golang.org/x/net/webdav/webdav.go +++ /dev/null @@ -1,702 +0,0 @@ -// Copyright 2014 The Go Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -// Package webdav provides a WebDAV server implementation. -package webdav // import "golang.org/x/net/webdav" - -import ( - "errors" - "fmt" - "io" - "net/http" - "net/url" - "os" - "path" - "strings" - "time" -) - -type Handler struct { - // Prefix is the URL path prefix to strip from WebDAV resource paths. - Prefix string - // FileSystem is the virtual file system. - FileSystem FileSystem - // LockSystem is the lock management system. - LockSystem LockSystem - // Logger is an optional error logger. If non-nil, it will be called - // for all HTTP requests. - Logger func(*http.Request, error) -} - -func (h *Handler) stripPrefix(p string) (string, int, error) { - if h.Prefix == "" { - return p, http.StatusOK, nil - } - if r := strings.TrimPrefix(p, h.Prefix); len(r) < len(p) { - return r, http.StatusOK, nil - } - return p, http.StatusNotFound, errPrefixMismatch -} - -func (h *Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) { - status, err := http.StatusBadRequest, errUnsupportedMethod - if h.FileSystem == nil { - status, err = http.StatusInternalServerError, errNoFileSystem - } else if h.LockSystem == nil { - status, err = http.StatusInternalServerError, errNoLockSystem - } else { - switch r.Method { - case "OPTIONS": - status, err = h.handleOptions(w, r) - case "GET", "HEAD", "POST": - status, err = h.handleGetHeadPost(w, r) - case "DELETE": - status, err = h.handleDelete(w, r) - case "PUT": - status, err = h.handlePut(w, r) - case "MKCOL": - status, err = h.handleMkcol(w, r) - case "COPY", "MOVE": - status, err = h.handleCopyMove(w, r) - case "LOCK": - status, err = h.handleLock(w, r) - case "UNLOCK": - status, err = h.handleUnlock(w, r) - case "PROPFIND": - status, err = h.handlePropfind(w, r) - case "PROPPATCH": - status, err = h.handleProppatch(w, r) - } - } - - if status != 0 { - w.WriteHeader(status) - if status != http.StatusNoContent { - w.Write([]byte(StatusText(status))) - } - } - if h.Logger != nil { - h.Logger(r, err) - } -} - -func (h *Handler) lock(now time.Time, root string) (token string, status int, err error) { - token, err = h.LockSystem.Create(now, LockDetails{ - Root: root, - Duration: infiniteTimeout, - ZeroDepth: true, - }) - if err != nil { - if err == ErrLocked { - return "", StatusLocked, err - } - return "", http.StatusInternalServerError, err - } - return token, 0, nil -} - -func (h *Handler) confirmLocks(r *http.Request, src, dst string) (release func(), status int, err error) { - hdr := r.Header.Get("If") - if hdr == "" { - // An empty If header means that the client hasn't previously created locks. - // Even if this client doesn't care about locks, we still need to check that - // the resources aren't locked by another client, so we create temporary - // locks that would conflict with another client's locks. These temporary - // locks are unlocked at the end of the HTTP request. - now, srcToken, dstToken := time.Now(), "", "" - if src != "" { - srcToken, status, err = h.lock(now, src) - if err != nil { - return nil, status, err - } - } - if dst != "" { - dstToken, status, err = h.lock(now, dst) - if err != nil { - if srcToken != "" { - h.LockSystem.Unlock(now, srcToken) - } - return nil, status, err - } - } - - return func() { - if dstToken != "" { - h.LockSystem.Unlock(now, dstToken) - } - if srcToken != "" { - h.LockSystem.Unlock(now, srcToken) - } - }, 0, nil - } - - ih, ok := parseIfHeader(hdr) - if !ok { - return nil, http.StatusBadRequest, errInvalidIfHeader - } - // ih is a disjunction (OR) of ifLists, so any ifList will do. - for _, l := range ih.lists { - lsrc := l.resourceTag - if lsrc == "" { - lsrc = src - } else { - u, err := url.Parse(lsrc) - if err != nil { - continue - } - if u.Host != r.Host { - continue - } - lsrc, status, err = h.stripPrefix(u.Path) - if err != nil { - return nil, status, err - } - } - release, err = h.LockSystem.Confirm(time.Now(), lsrc, dst, l.conditions...) - if err == ErrConfirmationFailed { - continue - } - if err != nil { - return nil, http.StatusInternalServerError, err - } - return release, 0, nil - } - // Section 10.4.1 says that "If this header is evaluated and all state lists - // fail, then the request must fail with a 412 (Precondition Failed) status." - // We follow the spec even though the cond_put_corrupt_token test case from - // the litmus test warns on seeing a 412 instead of a 423 (Locked). - return nil, http.StatusPreconditionFailed, ErrLocked -} - -func (h *Handler) handleOptions(w http.ResponseWriter, r *http.Request) (status int, err error) { - reqPath, status, err := h.stripPrefix(r.URL.Path) - if err != nil { - return status, err - } - ctx := getContext(r) - allow := "OPTIONS, LOCK, PUT, MKCOL" - if fi, err := h.FileSystem.Stat(ctx, reqPath); err == nil { - if fi.IsDir() { - allow = "OPTIONS, LOCK, DELETE, PROPPATCH, COPY, MOVE, UNLOCK, PROPFIND" - } else { - allow = "OPTIONS, LOCK, GET, HEAD, POST, DELETE, PROPPATCH, COPY, MOVE, UNLOCK, PROPFIND, PUT" - } - } - w.Header().Set("Allow", allow) - // http://www.webdav.org/specs/rfc4918.html#dav.compliance.classes - w.Header().Set("DAV", "1, 2") - // http://msdn.microsoft.com/en-au/library/cc250217.aspx - w.Header().Set("MS-Author-Via", "DAV") - return 0, nil -} - -func (h *Handler) handleGetHeadPost(w http.ResponseWriter, r *http.Request) (status int, err error) { - reqPath, status, err := h.stripPrefix(r.URL.Path) - if err != nil { - return status, err - } - // TODO: check locks for read-only access?? - ctx := getContext(r) - f, err := h.FileSystem.OpenFile(ctx, reqPath, os.O_RDONLY, 0) - if err != nil { - return http.StatusNotFound, err - } - defer f.Close() - fi, err := f.Stat() - if err != nil { - return http.StatusNotFound, err - } - if fi.IsDir() { - return http.StatusMethodNotAllowed, nil - } - etag, err := findETag(ctx, h.FileSystem, h.LockSystem, reqPath, fi) - if err != nil { - return http.StatusInternalServerError, err - } - w.Header().Set("ETag", etag) - // Let ServeContent determine the Content-Type header. - http.ServeContent(w, r, reqPath, fi.ModTime(), f) - return 0, nil -} - -func (h *Handler) handleDelete(w http.ResponseWriter, r *http.Request) (status int, err error) { - reqPath, status, err := h.stripPrefix(r.URL.Path) - if err != nil { - return status, err - } - release, status, err := h.confirmLocks(r, reqPath, "") - if err != nil { - return status, err - } - defer release() - - ctx := getContext(r) - - // TODO: return MultiStatus where appropriate. - - // "godoc os RemoveAll" says that "If the path does not exist, RemoveAll - // returns nil (no error)." WebDAV semantics are that it should return a - // "404 Not Found". We therefore have to Stat before we RemoveAll. - if _, err := h.FileSystem.Stat(ctx, reqPath); err != nil { - if os.IsNotExist(err) { - return http.StatusNotFound, err - } - return http.StatusMethodNotAllowed, err - } - if err := h.FileSystem.RemoveAll(ctx, reqPath); err != nil { - return http.StatusMethodNotAllowed, err - } - return http.StatusNoContent, nil -} - -func (h *Handler) handlePut(w http.ResponseWriter, r *http.Request) (status int, err error) { - reqPath, status, err := h.stripPrefix(r.URL.Path) - if err != nil { - return status, err - } - release, status, err := h.confirmLocks(r, reqPath, "") - if err != nil { - return status, err - } - defer release() - // TODO(rost): Support the If-Match, If-None-Match headers? See bradfitz' - // comments in http.checkEtag. - ctx := getContext(r) - - f, err := h.FileSystem.OpenFile(ctx, reqPath, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0666) - if err != nil { - return http.StatusNotFound, err - } - _, copyErr := io.Copy(f, r.Body) - fi, statErr := f.Stat() - closeErr := f.Close() - // TODO(rost): Returning 405 Method Not Allowed might not be appropriate. - if copyErr != nil { - return http.StatusMethodNotAllowed, copyErr - } - if statErr != nil { - return http.StatusMethodNotAllowed, statErr - } - if closeErr != nil { - return http.StatusMethodNotAllowed, closeErr - } - etag, err := findETag(ctx, h.FileSystem, h.LockSystem, reqPath, fi) - if err != nil { - return http.StatusInternalServerError, err - } - w.Header().Set("ETag", etag) - return http.StatusCreated, nil -} - -func (h *Handler) handleMkcol(w http.ResponseWriter, r *http.Request) (status int, err error) { - reqPath, status, err := h.stripPrefix(r.URL.Path) - if err != nil { - return status, err - } - release, status, err := h.confirmLocks(r, reqPath, "") - if err != nil { - return status, err - } - defer release() - - ctx := getContext(r) - - if r.ContentLength > 0 { - return http.StatusUnsupportedMediaType, nil - } - if err := h.FileSystem.Mkdir(ctx, reqPath, 0777); err != nil { - if os.IsNotExist(err) { - return http.StatusConflict, err - } - return http.StatusMethodNotAllowed, err - } - return http.StatusCreated, nil -} - -func (h *Handler) handleCopyMove(w http.ResponseWriter, r *http.Request) (status int, err error) { - 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 != r.Host { - return http.StatusBadGateway, errInvalidDestination - } - - src, status, err := h.stripPrefix(r.URL.Path) - if err != nil { - return status, err - } - - dst, status, err := h.stripPrefix(u.Path) - if err != nil { - return status, err - } - - if dst == "" { - return http.StatusBadGateway, errInvalidDestination - } - if dst == src { - return http.StatusForbidden, errDestinationEqualsSource - } - - ctx := getContext(r) - - 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) - 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, h.FileSystem, src, dst, r.Header.Get("Overwrite") != "F", depth, 0) - } - - release, status, err := h.confirmLocks(r, src, dst) - 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, h.FileSystem, src, dst, r.Header.Get("Overwrite") == "T") -} - -func (h *Handler) handleLock(w http.ResponseWriter, r *http.Request) (retStatus int, retErr error) { - duration, err := parseTimeout(r.Header.Get("Timeout")) - if err != nil { - return http.StatusBadRequest, err - } - li, status, err := readLockInfo(r.Body) - if err != nil { - return status, err - } - - ctx := getContext(r) - 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 = h.LockSystem.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) - if err != nil { - return status, err - } - ld = LockDetails{ - Root: reqPath, - Duration: duration, - OwnerXML: li.Owner.InnerXML, - ZeroDepth: depth == 0, - } - token, err = h.LockSystem.Create(now, ld) - if err != nil { - if err == ErrLocked { - return StatusLocked, err - } - return http.StatusInternalServerError, err - } - defer func() { - if retErr != nil { - h.LockSystem.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, token, ld) - return 0, nil -} - -func (h *Handler) handleUnlock(w http.ResponseWriter, r *http.Request) (status int, err error) { - // 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 = h.LockSystem.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 - } -} - -func (h *Handler) handlePropfind(w http.ResponseWriter, r *http.Request) (status int, err error) { - reqPath, status, err := h.stripPrefix(r.URL.Path) - if err != nil { - return status, err - } - ctx := getContext(r) - fi, err := h.FileSystem.Stat(ctx, reqPath) - if err != nil { - if os.IsNotExist(err) { - return http.StatusNotFound, err - } - return http.StatusMethodNotAllowed, 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 os.FileInfo, err error) error { - if err != nil { - return err - } - var pstats []Propstat - if pf.Propname != nil { - pnames, err := propnames(ctx, h.FileSystem, h.LockSystem, reqPath) - 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, h.FileSystem, h.LockSystem, reqPath, pf.Prop) - } else { - pstats, err = props(ctx, h.FileSystem, h.LockSystem, reqPath, pf.Prop) - } - if err != nil { - return err - } - return mw.write(makePropstatResponse(path.Join(h.Prefix, reqPath), pstats)) - } - - walkErr := walkFS(ctx, h.FileSystem, 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) (status int, err error) { - reqPath, status, err := h.stripPrefix(r.URL.Path) - if err != nil { - return status, err - } - release, status, err := h.confirmLocks(r, reqPath, "") - if err != nil { - return status, err - } - defer release() - - ctx := getContext(r) - - if _, err := h.FileSystem.Stat(ctx, reqPath); err != nil { - if os.IsNotExist(err) { - return http.StatusNotFound, err - } - return http.StatusMethodNotAllowed, err - } - patches, status, err := readProppatch(r.Body) - if err != nil { - return status, err - } - pstats, err := patch(ctx, h.FileSystem, h.LockSystem, 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") -) -- cgit v1.2.3