1 // Copyright (C) The Arvados Authors. All rights reserved.
3 // SPDX-License-Identifier: AGPL-3.0
22 "git.arvados.org/arvados.git/lib/cmd"
23 "git.arvados.org/arvados.git/sdk/go/arvados"
24 "git.arvados.org/arvados.git/sdk/go/arvadosclient"
25 "git.arvados.org/arvados.git/sdk/go/auth"
26 "git.arvados.org/arvados.git/sdk/go/ctxlog"
27 "git.arvados.org/arvados.git/sdk/go/httpserver"
28 "git.arvados.org/arvados.git/sdk/go/keepclient"
29 "github.com/sirupsen/logrus"
30 "golang.org/x/net/webdav"
35 Cluster *arvados.Cluster
37 webdavLS webdav.LockSystem
40 var urlPDHDecoder = strings.NewReplacer(" ", "+", "-", "+")
42 var notFoundMessage = "Not Found"
43 var unauthorizedMessage = "401 Unauthorized\r\n\r\nA valid Arvados token must be provided to access this resource.\r\n"
45 // parseCollectionIDFromURL returns a UUID or PDH if s is a UUID or a
46 // PDH (even if it is a PDH with "+" replaced by " " or "-");
48 func parseCollectionIDFromURL(s string) string {
49 if arvadosclient.UUIDMatch(s) {
52 if pdh := urlPDHDecoder.Replace(s); arvadosclient.PDHMatch(pdh) {
58 func (h *handler) setup() {
59 keepclient.DefaultBlockCache.MaxBlocks = h.Cluster.Collections.WebDAVCache.MaxBlockEntries
61 // Even though we don't accept LOCK requests, every webdav
62 // handler must have a non-nil LockSystem.
63 h.webdavLS = &noLockSystem{}
66 func (h *handler) serveStatus(w http.ResponseWriter, r *http.Request) {
67 json.NewEncoder(w).Encode(struct{ Version string }{cmd.Version.String()})
70 type errorWithHTTPStatus interface {
74 // updateOnSuccess wraps httpserver.ResponseWriter. If the handler
75 // sends an HTTP header indicating success, updateOnSuccess first
76 // calls the provided update func. If the update func fails, an error
77 // response is sent (using the error's HTTP status or 500 if none),
78 // and the status code and body sent by the handler are ignored (all
79 // response writes return the update error).
80 type updateOnSuccess struct {
81 httpserver.ResponseWriter
82 logger logrus.FieldLogger
88 func (uos *updateOnSuccess) Write(p []byte) (int, error) {
90 uos.WriteHeader(http.StatusOK)
95 return uos.ResponseWriter.Write(p)
98 func (uos *updateOnSuccess) WriteHeader(code int) {
100 uos.sentHeader = true
101 if code >= 200 && code < 400 {
102 if uos.err = uos.update(); uos.err != nil {
103 code := http.StatusInternalServerError
104 if he := errorWithHTTPStatus(nil); errors.As(uos.err, &he) {
105 code = he.HTTPStatus()
107 uos.logger.WithError(uos.err).Errorf("update() returned %T error, changing response to HTTP %d", uos.err, code)
108 http.Error(uos.ResponseWriter, uos.err.Error(), code)
113 uos.ResponseWriter.WriteHeader(code)
117 corsAllowHeadersHeader = strings.Join([]string{
118 "Authorization", "Content-Type", "Range",
119 // WebDAV request headers:
120 "Depth", "Destination", "If", "Lock-Token", "Overwrite", "Timeout",
122 writeMethod = map[string]bool{
133 webdavMethod = map[string]bool{
146 browserMethod = map[string]bool{
151 // top-level dirs to serve with siteFS
152 siteFSDir = map[string]bool{
153 "": true, // root directory
159 func stripDefaultPort(host string) string {
160 // Will consider port 80 and port 443 to be the same vhost. I think that's fine.
161 u := &url.URL{Host: host}
162 if p := u.Port(); p == "80" || p == "443" {
163 return strings.ToLower(u.Hostname())
165 return strings.ToLower(host)
169 // CheckHealth implements service.Handler.
170 func (h *handler) CheckHealth() error {
174 // Done implements service.Handler.
175 func (h *handler) Done() <-chan struct{} {
179 // ServeHTTP implements http.Handler.
180 func (h *handler) ServeHTTP(wOrig http.ResponseWriter, r *http.Request) {
181 h.setupOnce.Do(h.setup)
183 if xfp := r.Header.Get("X-Forwarded-Proto"); xfp != "" && xfp != "http" {
187 w := httpserver.WrapResponseWriter(wOrig)
189 if method := r.Header.Get("Access-Control-Request-Method"); method != "" && r.Method == "OPTIONS" {
190 if !browserMethod[method] && !webdavMethod[method] {
191 w.WriteHeader(http.StatusMethodNotAllowed)
194 w.Header().Set("Access-Control-Allow-Headers", corsAllowHeadersHeader)
195 w.Header().Set("Access-Control-Allow-Methods", "COPY, DELETE, GET, LOCK, MKCOL, MOVE, OPTIONS, POST, PROPFIND, PROPPATCH, PUT, RMCOL, UNLOCK")
196 w.Header().Set("Access-Control-Allow-Origin", "*")
197 w.Header().Set("Access-Control-Max-Age", "86400")
201 if !browserMethod[r.Method] && !webdavMethod[r.Method] {
202 w.WriteHeader(http.StatusMethodNotAllowed)
206 if r.Header.Get("Origin") != "" {
207 // Allow simple cross-origin requests without user
208 // credentials ("user credentials" as defined by CORS,
209 // i.e., cookies, HTTP authentication, and client-side
210 // SSL certificates. See
211 // http://www.w3.org/TR/cors/#user-credentials).
212 w.Header().Set("Access-Control-Allow-Origin", "*")
213 w.Header().Set("Access-Control-Expose-Headers", "Content-Range")
220 pathParts := strings.Split(r.URL.Path[1:], "/")
223 var collectionID string
225 var reqTokens []string
229 credentialsOK := h.Cluster.Collections.TrustAllContent
230 reasonNotAcceptingCredentials := ""
232 if r.Host != "" && stripDefaultPort(r.Host) == stripDefaultPort(h.Cluster.Services.WebDAVDownload.ExternalURL.Host) {
235 } else if r.FormValue("disposition") == "attachment" {
240 reasonNotAcceptingCredentials = fmt.Sprintf("vhost %q does not specify a single collection ID or match Services.WebDAVDownload.ExternalURL %q, and Collections.TrustAllContent is false",
241 r.Host, h.Cluster.Services.WebDAVDownload.ExternalURL)
244 if collectionID = arvados.CollectionIDFromDNSName(r.Host); collectionID != "" {
245 // http://ID.collections.example/PATH...
247 } else if r.URL.Path == "/status.json" {
250 } else if siteFSDir[pathParts[0]] {
252 } else if len(pathParts) >= 1 && strings.HasPrefix(pathParts[0], "c=") {
254 collectionID = parseCollectionIDFromURL(pathParts[0][2:])
256 } else if len(pathParts) >= 2 && pathParts[0] == "collections" {
257 if len(pathParts) >= 4 && pathParts[1] == "download" {
258 // /collections/download/ID/TOKEN/PATH...
259 collectionID = parseCollectionIDFromURL(pathParts[2])
260 tokens = []string{pathParts[3]}
264 // /collections/ID/PATH...
265 collectionID = parseCollectionIDFromURL(pathParts[1])
267 // This path is only meant to work for public
268 // data. Tokens provided with the request are
270 credentialsOK = false
271 reasonNotAcceptingCredentials = "the '/collections/UUID/PATH' form only works for public data"
276 if cc := r.Header.Get("Cache-Control"); strings.Contains(cc, "no-cache") || strings.Contains(cc, "must-revalidate") {
281 reqTokens = auth.CredentialsFromRequest(r).Tokens
284 formToken := r.FormValue("api_token")
285 origin := r.Header.Get("Origin")
286 cors := origin != "" && !strings.HasSuffix(origin, "://"+r.Host)
287 safeAjax := cors && (r.Method == http.MethodGet || r.Method == http.MethodHead)
288 safeAttachment := attachment && r.URL.Query().Get("api_token") == ""
290 // No token to use or redact.
291 } else if safeAjax || safeAttachment {
292 // If this is a cross-origin request, the URL won't
293 // appear in the browser's address bar, so
294 // substituting a clipboard-safe URL is pointless.
295 // Redirect-with-cookie wouldn't work anyway, because
296 // it's not safe to allow third-party use of our
299 // If we're supplying an attachment, we don't need to
300 // convert POST to GET to avoid the "really resubmit
301 // form?" problem, so provided the token isn't
302 // embedded in the URL, there's no reason to do
303 // redirect-with-cookie in this case either.
304 reqTokens = append(reqTokens, formToken)
305 } else if browserMethod[r.Method] {
306 // If this is a page view, and the client provided a
307 // token via query string or POST body, we must put
308 // the token in an HttpOnly cookie, and redirect to an
309 // equivalent URL with the query param redacted and
311 h.seeOtherWithCookie(w, r, "", credentialsOK)
315 targetPath := pathParts[stripParts:]
316 if tokens == nil && len(targetPath) > 0 && strings.HasPrefix(targetPath[0], "t=") {
317 // http://ID.example/t=TOKEN/PATH...
318 // /c=ID/t=TOKEN/PATH...
320 // This form must only be used to pass scoped tokens
321 // that give permission for a single collection. See
322 // FormValue case above.
323 tokens = []string{targetPath[0][2:]}
325 targetPath = targetPath[1:]
331 if writeMethod[r.Method] {
332 http.Error(w, errReadOnly.Error(), http.StatusMethodNotAllowed)
335 if len(reqTokens) == 0 {
336 w.Header().Add("WWW-Authenticate", "Basic realm=\"collections\"")
337 http.Error(w, unauthorizedMessage, http.StatusUnauthorized)
341 } else if collectionID == "" {
342 http.Error(w, notFoundMessage, http.StatusNotFound)
345 fsprefix = "by_id/" + collectionID + "/"
350 if h.Cluster.Users.AnonymousUserToken != "" {
351 tokens = append(tokens, h.Cluster.Users.AnonymousUserToken)
357 http.Error(w, fmt.Sprintf("Authorization tokens are not accepted here: %v, and no anonymous user token is configured.", reasonNotAcceptingCredentials), http.StatusUnauthorized)
359 http.Error(w, fmt.Sprintf("No authorization token in request, and no anonymous user token is configured."), http.StatusUnauthorized)
364 if len(targetPath) > 0 && targetPath[0] == "_" {
365 // If a collection has a directory called "t=foo" or
366 // "_", it can be served at
367 // //collections.example/_/t=foo/ or
368 // //collections.example/_/_/ respectively:
369 // //collections.example/t=foo/ won't work because
370 // t=foo will be interpreted as a token "foo".
371 targetPath = targetPath[1:]
375 dirOpenMode := os.O_RDONLY
376 if writeMethod[r.Method] {
377 dirOpenMode = os.O_RDWR
380 validToken := make(map[string]bool)
382 var tokenUser *arvados.User
383 var sessionFS arvados.CustomFileSystem
384 var session *cachedSession
385 var collectionDir arvados.File
386 for _, token = range tokens {
387 var statusErr errorWithHTTPStatus
388 fs, sess, user, err := h.Cache.GetSession(token)
389 if errors.As(err, &statusErr) && statusErr.HTTPStatus() == http.StatusUnauthorized {
392 } else if err != nil {
393 http.Error(w, "cache error: "+err.Error(), http.StatusInternalServerError)
396 f, err := fs.OpenFile(fsprefix, dirOpenMode, 0)
397 if errors.As(err, &statusErr) && statusErr.HTTPStatus() == http.StatusForbidden {
398 // collection id is outside token scope
399 validToken[token] = true
402 validToken[token] = true
403 if os.IsNotExist(err) {
404 // collection does not exist or is not
405 // readable using this token
407 } else if err != nil {
408 http.Error(w, err.Error(), http.StatusInternalServerError)
413 collectionDir, sessionFS, session, tokenUser = f, fs, sess, user
416 if forceReload && collectionDir != nil {
417 err := collectionDir.Sync()
419 if he := errorWithHTTPStatus(nil); errors.As(err, &he) {
420 http.Error(w, err.Error(), he.HTTPStatus())
422 http.Error(w, err.Error(), http.StatusInternalServerError)
428 if pathToken || !credentialsOK {
429 // Either the URL is a "secret sharing link"
430 // that didn't work out (and asking the client
431 // for additional credentials would just be
432 // confusing), or we don't even accept
433 // credentials at this path.
434 http.Error(w, notFoundMessage, http.StatusNotFound)
437 for _, t := range reqTokens {
439 // The client provided valid token(s),
440 // but the collection was not found.
441 http.Error(w, notFoundMessage, http.StatusNotFound)
445 // The client's token was invalid (e.g., expired), or
446 // the client didn't even provide one. Redirect to
447 // workbench2's login-and-redirect-to-download url if
448 // this is a browser navigation request. (The redirect
449 // flow can't preserve the original method if it's not
450 // GET, and doesn't make sense if the UA is a
451 // command-line tool, is trying to load an inline
452 // image, etc.; in these cases, there's nothing we can
453 // do, so return 401 unauthorized.)
455 // Note Sec-Fetch-Mode is sent by all non-EOL
456 // browsers, except Safari.
457 // https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Sec-Fetch-Mode
459 // TODO(TC): This response would be confusing to
460 // someone trying (anonymously) to download public
461 // data that has been deleted. Allow a referrer to
462 // provide this context somehow?
463 if r.Method == http.MethodGet && r.Header.Get("Sec-Fetch-Mode") == "navigate" {
464 target := url.URL(h.Cluster.Services.Workbench2.ExternalURL)
465 redirkey := "redirectToPreview"
467 redirkey = "redirectToDownload"
469 callback := "/c=" + collectionID + "/" + strings.Join(targetPath, "/")
470 // target.RawQuery = url.Values{redirkey:
471 // {target}}.Encode() would be the obvious
472 // thing to do here, but wb2 doesn't decode
473 // this as a query param -- it takes
474 // everything after "${redirkey}=" as the
475 // target URL. If we encode "/" as "%2F" etc.,
476 // the redirect won't work.
477 target.RawQuery = redirkey + "=" + callback
478 w.Header().Add("Location", target.String())
479 w.WriteHeader(http.StatusSeeOther)
481 w.Header().Add("WWW-Authenticate", "Basic realm=\"collections\"")
482 http.Error(w, unauthorizedMessage, http.StatusUnauthorized)
487 if r.Method == http.MethodGet || r.Method == http.MethodHead {
488 targetfnm := fsprefix + strings.Join(pathParts[stripParts:], "/")
489 if fi, err := sessionFS.Stat(targetfnm); err == nil && fi.IsDir() {
490 if !strings.HasSuffix(r.URL.Path, "/") {
491 h.seeOtherWithCookie(w, r, r.URL.Path+"/", credentialsOK)
493 h.serveDirectory(w, r, fi.Name(), sessionFS, targetfnm, !useSiteFS)
500 if len(targetPath) > 0 {
501 basename = targetPath[len(targetPath)-1]
503 if arvadosclient.PDHMatch(collectionID) && writeMethod[r.Method] {
504 http.Error(w, errReadOnly.Error(), http.StatusMethodNotAllowed)
507 if !h.userPermittedToUploadOrDownload(r.Method, tokenUser) {
508 http.Error(w, "Not permitted", http.StatusForbidden)
511 h.logUploadOrDownload(r, session.arvadosclient, sessionFS, fsprefix+strings.Join(targetPath, "/"), nil, tokenUser)
513 if writeMethod[r.Method] {
514 // Save the collection only if/when all
515 // webdav->filesystem operations succeed --
516 // and send a 500 error if the modified
517 // collection can't be saved.
519 // Perform the write in a separate sitefs, so
520 // concurrent read operations on the same
521 // collection see the previous saved
522 // state. After the write succeeds and the
523 // collection record is updated, we reset the
524 // session so the updates are visible in
525 // subsequent read requests.
526 client := session.client.WithRequestID(r.Header.Get("X-Request-Id"))
527 sessionFS = client.SiteFileSystem(session.keepclient)
528 writingDir, err := sessionFS.OpenFile(fsprefix, os.O_RDONLY, 0)
530 http.Error(w, err.Error(), http.StatusInternalServerError)
533 defer writingDir.Close()
534 w = &updateOnSuccess{
536 logger: ctxlog.FromContext(r.Context()),
537 update: func() error {
538 err := writingDir.Sync()
539 var te arvados.TransactionError
540 if errors.As(err, &te) {
546 // Sync the changes to the persistent
547 // sessionfs for this token.
548 snap, err := writingDir.Snapshot()
552 collectionDir.Splice(snap)
556 if r.Method == http.MethodGet {
557 applyContentDispositionHdr(w, r, basename, attachment)
559 wh := webdav.Handler{
560 Prefix: "/" + strings.Join(pathParts[:stripParts], "/"),
561 FileSystem: &webdavFS{
564 writing: writeMethod[r.Method],
565 alwaysReadEOF: r.Method == "PROPFIND",
567 LockSystem: h.webdavLS,
568 Logger: func(r *http.Request, err error) {
570 ctxlog.FromContext(r.Context()).WithError(err).Error("error reported by webdav handler")
575 if r.Method == http.MethodGet && w.WroteStatus() == http.StatusOK {
576 wrote := int64(w.WroteBodyBytes())
577 fnm := strings.Join(pathParts[stripParts:], "/")
578 fi, err := wh.FileSystem.Stat(r.Context(), fnm)
579 if err == nil && fi.Size() != wrote {
581 f, err := wh.FileSystem.OpenFile(r.Context(), fnm, os.O_RDONLY, 0)
583 n, err = f.Read(make([]byte, 1024))
586 ctxlog.FromContext(r.Context()).Errorf("stat.Size()==%d but only wrote %d bytes; read(1024) returns %d, %v", fi.Size(), wrote, n, err)
591 var dirListingTemplate = `<!DOCTYPE HTML>
593 <META name="robots" content="NOINDEX">
594 <TITLE>{{ .CollectionName }}</TITLE>
595 <STYLE type="text/css">
600 background-color: #D9EDF7;
601 border-radius: .25em;
612 font-family: monospace;
619 <H1>{{ .CollectionName }}</H1>
621 <P>This collection of data files is being shared with you through
622 Arvados. You can download individual files listed below. To download
623 the entire directory tree with wget, try:</P>
625 <PRE>$ wget --mirror --no-parent --no-host --cut-dirs={{ .StripParts }} https://{{ .Request.Host }}{{ .Request.URL.Path }}</PRE>
627 <H2>File Listing</H2>
633 <LI>{{" " | printf "%15s " | nbsp}}<A href="{{print "./" .Name}}/">{{.Name}}/</A></LI>
635 <LI>{{.Size | printf "%15d " | nbsp}}<A href="{{print "./" .Name}}">{{.Name}}</A></LI>
640 <P>(No files; this collection is empty.)</P>
647 Arvados is a free and open source software bioinformatics platform.
648 To learn more, visit arvados.org.
649 Arvados is not responsible for the files listed on this page.
656 type fileListEnt struct {
662 func (h *handler) serveDirectory(w http.ResponseWriter, r *http.Request, collectionName string, fs http.FileSystem, base string, recurse bool) {
663 var files []fileListEnt
664 var walk func(string) error
665 if !strings.HasSuffix(base, "/") {
668 walk = func(path string) error {
669 dirname := base + path
671 dirname = strings.TrimSuffix(dirname, "/")
673 d, err := fs.Open(dirname)
677 ents, err := d.Readdir(-1)
681 for _, ent := range ents {
682 if recurse && ent.IsDir() {
683 err = walk(path + ent.Name() + "/")
688 files = append(files, fileListEnt{
689 Name: path + ent.Name(),
697 if err := walk(""); err != nil {
698 http.Error(w, "error getting directory listing: "+err.Error(), http.StatusInternalServerError)
702 funcs := template.FuncMap{
703 "nbsp": func(s string) template.HTML {
704 return template.HTML(strings.Replace(s, " ", " ", -1))
707 tmpl, err := template.New("dir").Funcs(funcs).Parse(dirListingTemplate)
709 http.Error(w, "error parsing template: "+err.Error(), http.StatusInternalServerError)
712 sort.Slice(files, func(i, j int) bool {
713 return files[i].Name < files[j].Name
715 w.WriteHeader(http.StatusOK)
716 tmpl.Execute(w, map[string]interface{}{
717 "CollectionName": collectionName,
720 "StripParts": strings.Count(strings.TrimRight(r.URL.Path, "/"), "/"),
724 func applyContentDispositionHdr(w http.ResponseWriter, r *http.Request, filename string, isAttachment bool) {
725 disposition := "inline"
727 disposition = "attachment"
729 if strings.ContainsRune(r.RequestURI, '?') {
730 // Help the UA realize that the filename is just
731 // "filename.txt", not
732 // "filename.txt?disposition=attachment".
734 // TODO(TC): Follow advice at RFC 6266 appendix D
735 disposition += "; filename=" + strconv.QuoteToASCII(filename)
737 if disposition != "inline" {
738 w.Header().Set("Content-Disposition", disposition)
742 func (h *handler) seeOtherWithCookie(w http.ResponseWriter, r *http.Request, location string, credentialsOK bool) {
743 if formToken := r.FormValue("api_token"); formToken != "" {
745 // It is not safe to copy the provided token
746 // into a cookie unless the current vhost
747 // (origin) serves only a single collection or
748 // we are in TrustAllContent mode.
749 http.Error(w, "cannot serve inline content at this URL (possible configuration error; see https://doc.arvados.org/install/install-keep-web.html#dns)", http.StatusBadRequest)
753 // The HttpOnly flag is necessary to prevent
754 // JavaScript code (included in, or loaded by, a page
755 // in the collection being served) from employing the
756 // user's token beyond reading other files in the same
757 // domain, i.e., same collection.
759 // The 303 redirect is necessary in the case of a GET
760 // request to avoid exposing the token in the Location
761 // bar, and in the case of a POST request to avoid
762 // raising warnings when the user refreshes the
764 http.SetCookie(w, &http.Cookie{
765 Name: "arvados_api_token",
766 Value: auth.EncodeTokenCookie([]byte(formToken)),
769 SameSite: http.SameSiteLaxMode,
773 // Propagate query parameters (except api_token) from
774 // the original request.
775 redirQuery := r.URL.Query()
776 redirQuery.Del("api_token")
780 newu, err := u.Parse(location)
782 http.Error(w, "error resolving redirect target: "+err.Error(), http.StatusInternalServerError)
788 Scheme: r.URL.Scheme,
791 RawQuery: redirQuery.Encode(),
794 w.Header().Add("Location", redir)
795 w.WriteHeader(http.StatusSeeOther)
796 io.WriteString(w, `<A href="`)
797 io.WriteString(w, html.EscapeString(redir))
798 io.WriteString(w, `">Continue</A>`)
801 func (h *handler) userPermittedToUploadOrDownload(method string, tokenUser *arvados.User) bool {
802 var permitDownload bool
803 var permitUpload bool
804 if tokenUser != nil && tokenUser.IsAdmin {
805 permitUpload = h.Cluster.Collections.WebDAVPermission.Admin.Upload
806 permitDownload = h.Cluster.Collections.WebDAVPermission.Admin.Download
808 permitUpload = h.Cluster.Collections.WebDAVPermission.User.Upload
809 permitDownload = h.Cluster.Collections.WebDAVPermission.User.Download
811 if (method == "PUT" || method == "POST") && !permitUpload {
812 // Disallow operations that upload new files.
813 // Permit webdav operations that move existing files around.
815 } else if method == "GET" && !permitDownload {
816 // Disallow downloading file contents.
817 // Permit webdav operations like PROPFIND that retrieve metadata
818 // but not file contents.
824 func (h *handler) logUploadOrDownload(
826 client *arvadosclient.ArvadosClient,
827 fs arvados.CustomFileSystem,
829 collection *arvados.Collection,
830 user *arvados.User) {
832 log := ctxlog.FromContext(r.Context())
833 props := make(map[string]string)
834 props["reqPath"] = r.URL.Path
837 log = log.WithField("user_uuid", user.UUID).
838 WithField("user_full_name", user.FullName)
841 useruuid = fmt.Sprintf("%s-tpzed-anonymouspublic", h.Cluster.ClusterID)
843 if collection == nil && fs != nil {
844 collection, filepath = h.determineCollection(fs, filepath)
846 if collection != nil {
847 log = log.WithField("collection_file_path", filepath)
848 props["collection_file_path"] = filepath
849 // h.determineCollection populates the collection_uuid
850 // prop with the PDH, if this collection is being
851 // accessed via PDH. For logging, we use a different
852 // field depending on whether it's a UUID or PDH.
853 if len(collection.UUID) > 32 {
854 log = log.WithField("portable_data_hash", collection.UUID)
855 props["portable_data_hash"] = collection.UUID
857 log = log.WithField("collection_uuid", collection.UUID)
858 props["collection_uuid"] = collection.UUID
861 if r.Method == "PUT" || r.Method == "POST" {
862 log.Info("File upload")
863 if h.Cluster.Collections.WebDAVLogEvents {
865 lr := arvadosclient.Dict{"log": arvadosclient.Dict{
866 "object_uuid": useruuid,
867 "event_type": "file_upload",
868 "properties": props}}
869 err := client.Create("logs", lr, nil)
871 log.WithError(err).Error("Failed to create upload log event on API server")
875 } else if r.Method == "GET" {
876 if collection != nil && collection.PortableDataHash != "" {
877 log = log.WithField("portable_data_hash", collection.PortableDataHash)
878 props["portable_data_hash"] = collection.PortableDataHash
880 log.Info("File download")
881 if h.Cluster.Collections.WebDAVLogEvents {
883 lr := arvadosclient.Dict{"log": arvadosclient.Dict{
884 "object_uuid": useruuid,
885 "event_type": "file_download",
886 "properties": props}}
887 err := client.Create("logs", lr, nil)
889 log.WithError(err).Error("Failed to create download log event on API server")
896 func (h *handler) determineCollection(fs arvados.CustomFileSystem, path string) (*arvados.Collection, string) {
897 target := strings.TrimSuffix(path, "/")
898 for cut := len(target); cut >= 0; cut = strings.LastIndexByte(target, '/') {
899 target = target[:cut]
900 fi, err := fs.Stat(target)
901 if os.IsNotExist(err) {
902 // creating a new file/dir, or download
905 } else if err != nil {
908 switch src := fi.Sys().(type) {
909 case *arvados.Collection:
910 return src, strings.TrimPrefix(path[len(target):], "/")
914 if _, ok := src.(error); ok {