import (
"encoding/json"
+ "errors"
"fmt"
"html"
"html/template"
"net/http"
"net/url"
"os"
- "path/filepath"
"sort"
"strconv"
"strings"
"sync"
+ "time"
+ "git.arvados.org/arvados.git/lib/cmd"
+ "git.arvados.org/arvados.git/lib/webdavfs"
"git.arvados.org/arvados.git/sdk/go/arvados"
"git.arvados.org/arvados.git/sdk/go/arvadosclient"
"git.arvados.org/arvados.git/sdk/go/auth"
"git.arvados.org/arvados.git/sdk/go/ctxlog"
"git.arvados.org/arvados.git/sdk/go/httpserver"
- "git.arvados.org/arvados.git/sdk/go/keepclient"
"github.com/sirupsen/logrus"
"golang.org/x/net/webdav"
)
type handler struct {
- Cache cache
- Cluster *arvados.Cluster
- clientPool *arvadosclient.ClientPool
- setupOnce sync.Once
- webdavLS webdav.LockSystem
+ Cache cache
+ Cluster *arvados.Cluster
+ metrics *metrics
+
+ lockMtx sync.Mutex
+ lock map[string]*sync.RWMutex
+ lockTidied time.Time
}
var urlPDHDecoder = strings.NewReplacer(" ", "+", "-", "+")
-var notFoundMessage = "404 Not found\r\n\r\nThe requested path was not found, or you do not have permission to access it.\r"
-var unauthorizedMessage = "401 Unauthorized\r\n\r\nA valid Arvados token must be provided to access this resource.\r"
+var notFoundMessage = "Not Found"
+var unauthorizedMessage = "401 Unauthorized\n\nA valid Arvados token must be provided to access this resource."
// parseCollectionIDFromURL returns a UUID or PDH if s is a UUID or a
// PDH (even if it is a PDH with "+" replaced by " " or "-");
return ""
}
-func (h *handler) setup() {
- // Errors will be handled at the client pool.
- arv, _ := arvados.NewClientFromConfig(h.Cluster)
- h.clientPool = arvadosclient.MakeClientPoolWith(arv)
-
- keepclient.DefaultBlockCache.MaxBlocks = h.Cluster.Collections.WebDAVCache.MaxBlockEntries
-
- // Even though we don't accept LOCK requests, every webdav
- // handler must have a non-nil LockSystem.
- h.webdavLS = &noLockSystem{}
+func (h *handler) serveStatus(w http.ResponseWriter, r *http.Request) {
+ json.NewEncoder(w).Encode(struct{ Version string }{cmd.Version.String()})
}
-func (h *handler) serveStatus(w http.ResponseWriter, r *http.Request) {
- json.NewEncoder(w).Encode(struct{ Version string }{version})
+type errorWithHTTPStatus interface {
+ HTTPStatus() int
}
// updateOnSuccess wraps httpserver.ResponseWriter. If the handler
// sends an HTTP header indicating success, updateOnSuccess first
-// calls the provided update func. If the update func fails, a 500
-// response is sent, and the status code and body sent by the handler
-// are ignored (all response writes return the update error).
+// calls the provided update func. If the update func fails, an error
+// response is sent (using the error's HTTP status or 500 if none),
+// and the status code and body sent by the handler are ignored (all
+// response writes return the update error).
type updateOnSuccess struct {
httpserver.ResponseWriter
logger logrus.FieldLogger
if code >= 200 && code < 400 {
if uos.err = uos.update(); uos.err != nil {
code := http.StatusInternalServerError
- if err, ok := uos.err.(*arvados.TransactionError); ok {
- code = err.StatusCode
+ if he := errorWithHTTPStatus(nil); errors.As(uos.err, &he) {
+ code = he.HTTPStatus()
}
- uos.logger.WithError(uos.err).Errorf("update() returned error type %T, changing response to HTTP %d", uos.err, code)
+ uos.logger.WithError(uos.err).Errorf("update() returned %T error, changing response to HTTP %d", uos.err, code)
http.Error(uos.ResponseWriter, uos.err.Error(), code)
return
}
corsAllowHeadersHeader = strings.Join([]string{
"Authorization", "Content-Type", "Range",
// WebDAV request headers:
- "Depth", "Destination", "If", "Lock-Token", "Overwrite", "Timeout",
+ "Depth", "Destination", "If", "Lock-Token", "Overwrite", "Timeout", "Cache-Control",
}, ", ")
writeMethod = map[string]bool{
"COPY": true,
// ServeHTTP implements http.Handler.
func (h *handler) ServeHTTP(wOrig http.ResponseWriter, r *http.Request) {
- h.setupOnce.Do(h.setup)
-
if xfp := r.Header.Get("X-Forwarded-Proto"); xfp != "" && xfp != "http" {
r.URL.Scheme = xfp
}
- w := httpserver.WrapResponseWriter(wOrig)
+ wbuffer := newWriteBuffer(wOrig, int(h.Cluster.Collections.WebDAVOutputBuffer))
+ defer wbuffer.Close()
+ w := httpserver.WrapResponseWriter(responseWriter{
+ Writer: wbuffer,
+ ResponseWriter: wOrig,
+ })
- if method := r.Header.Get("Access-Control-Request-Method"); method != "" && r.Method == "OPTIONS" {
- if !browserMethod[method] && !webdavMethod[method] {
- w.WriteHeader(http.StatusMethodNotAllowed)
- return
- }
- w.Header().Set("Access-Control-Allow-Headers", corsAllowHeadersHeader)
- w.Header().Set("Access-Control-Allow-Methods", "COPY, DELETE, GET, LOCK, MKCOL, MOVE, OPTIONS, POST, PROPFIND, PROPPATCH, PUT, RMCOL, UNLOCK")
- w.Header().Set("Access-Control-Allow-Origin", "*")
- w.Header().Set("Access-Control-Max-Age", "86400")
+ if r.Method == "OPTIONS" && ServeCORSPreflight(w, r.Header) {
return
}
return
}
- pathParts := strings.Split(r.URL.Path[1:], "/")
+ webdavPrefix := ""
+ arvPath := r.URL.Path
+ if prefix := r.Header.Get("X-Webdav-Prefix"); prefix != "" {
+ // Enable a proxy (e.g., container log handler in
+ // controller) to satisfy a request for path
+ // "/foo/bar/baz.txt" using content from
+ // "//abc123-4.internal/bar/baz.txt", by adding a
+ // request header "X-Webdav-Prefix: /foo"
+ if !strings.HasPrefix(arvPath, prefix) {
+ http.Error(w, "X-Webdav-Prefix header is not a prefix of the requested path", http.StatusBadRequest)
+ return
+ }
+ arvPath = r.URL.Path[len(prefix):]
+ if arvPath == "" {
+ arvPath = "/"
+ }
+ w.Header().Set("Vary", "X-Webdav-Prefix, "+w.Header().Get("Vary"))
+ webdavPrefix = prefix
+ }
+ pathParts := strings.Split(arvPath[1:], "/")
var stripParts int
var collectionID string
}
}
- if collectionID == "" && !useSiteFS {
- http.Error(w, notFoundMessage, http.StatusNotFound)
- return
- }
-
forceReload := false
if cc := r.Header.Get("Cache-Control"); strings.Contains(cc, "no-cache") || strings.Contains(cc, "must-revalidate") {
forceReload = true
reqTokens = auth.CredentialsFromRequest(r).Tokens
}
- formToken := r.FormValue("api_token")
+ r.ParseForm()
origin := r.Header.Get("Origin")
cors := origin != "" && !strings.HasSuffix(origin, "://"+r.Host)
safeAjax := cors && (r.Method == http.MethodGet || r.Method == http.MethodHead)
- safeAttachment := attachment && r.URL.Query().Get("api_token") == ""
- if formToken == "" {
+ // Important distinction: safeAttachment checks whether api_token exists
+ // as a query parameter. haveFormTokens checks whether api_token exists
+ // as request form data *or* a query parameter. Different checks are
+ // necessary because both the request disposition and the location of
+ // the API token affect whether or not the request needs to be
+ // redirected. The different branch comments below explain further.
+ safeAttachment := attachment && !r.URL.Query().Has("api_token")
+ if formTokens, haveFormTokens := r.Form["api_token"]; !haveFormTokens {
// No token to use or redact.
} else if safeAjax || safeAttachment {
// If this is a cross-origin request, the URL won't
// form?" problem, so provided the token isn't
// embedded in the URL, there's no reason to do
// redirect-with-cookie in this case either.
- reqTokens = append(reqTokens, formToken)
+ for _, tok := range formTokens {
+ reqTokens = append(reqTokens, tok)
+ }
} else if browserMethod[r.Method] {
// If this is a page view, and the client provided a
// token via query string or POST body, we must put
return
}
- if useSiteFS {
- h.serveSiteFS(w, r, reqTokens, credentialsOK, attachment)
- return
- }
-
targetPath := pathParts[stripParts:]
if tokens == nil && len(targetPath) > 0 && strings.HasPrefix(targetPath[0], "t=") {
// http://ID.example/t=TOKEN/PATH...
stripParts++
}
- if tokens == nil {
- tokens = reqTokens
- if h.Cluster.Users.AnonymousUserToken != "" {
- tokens = append(tokens, h.Cluster.Users.AnonymousUserToken)
+ fsprefix := ""
+ if useSiteFS {
+ if writeMethod[r.Method] {
+ http.Error(w, webdavfs.ErrReadOnly.Error(), http.StatusMethodNotAllowed)
+ return
+ }
+ if len(reqTokens) == 0 {
+ w.Header().Add("WWW-Authenticate", "Basic realm=\"collections\"")
+ http.Error(w, unauthorizedMessage, http.StatusUnauthorized)
+ return
}
+ tokens = reqTokens
+ } else if collectionID == "" {
+ http.Error(w, notFoundMessage, http.StatusNotFound)
+ return
+ } else {
+ fsprefix = "by_id/" + collectionID + "/"
+ }
+
+ if src := r.Header.Get("X-Webdav-Source"); strings.HasPrefix(src, "/") && !strings.Contains(src, "//") && !strings.Contains(src, "/../") {
+ fsprefix += src[1:]
}
if tokens == nil {
- if !credentialsOK {
- http.Error(w, fmt.Sprintf("Authorization tokens are not accepted here: %v, and no anonymous user token is configured.", reasonNotAcceptingCredentials), http.StatusUnauthorized)
- } else {
- http.Error(w, fmt.Sprintf("No authorization token in request, and no anonymous user token is configured."), http.StatusUnauthorized)
+ tokens = reqTokens
+ if h.Cluster.Users.AnonymousUserToken != "" {
+ tokens = append(tokens, h.Cluster.Users.AnonymousUserToken)
}
- return
}
if len(targetPath) > 0 && targetPath[0] == "_" {
stripParts++
}
- arv := h.clientPool.Get()
- if arv == nil {
- http.Error(w, "client pool error: "+h.clientPool.Err().Error(), http.StatusInternalServerError)
- return
+ dirOpenMode := os.O_RDONLY
+ if writeMethod[r.Method] {
+ dirOpenMode = os.O_RDWR
}
- defer h.clientPool.Put(arv)
- var collection *arvados.Collection
+ var tokenValid bool
+ var tokenScopeProblem bool
+ var token string
var tokenUser *arvados.User
- tokenResult := make(map[string]int)
- for _, arv.ApiToken = range tokens {
- var err error
- collection, err = h.Cache.Get(arv, collectionID, forceReload)
- if err == nil {
- // Success
- break
+ var sessionFS arvados.CustomFileSystem
+ var session *cachedSession
+ var collectionDir arvados.File
+ for _, token = range tokens {
+ var statusErr errorWithHTTPStatus
+ fs, sess, user, err := h.Cache.GetSession(token)
+ if errors.As(err, &statusErr) && statusErr.HTTPStatus() == http.StatusUnauthorized {
+ // bad token
+ continue
+ } else if err != nil {
+ http.Error(w, "cache error: "+err.Error(), http.StatusInternalServerError)
+ return
}
- if srvErr, ok := err.(arvadosclient.APIServerError); ok {
- switch srvErr.HttpStatusCode {
- case 404, 401:
- // Token broken or insufficient to
- // retrieve collection
- tokenResult[arv.ApiToken] = srvErr.HttpStatusCode
- continue
+ if token != h.Cluster.Users.AnonymousUserToken {
+ tokenValid = true
+ }
+ f, err := fs.OpenFile(fsprefix, dirOpenMode, 0)
+ if errors.As(err, &statusErr) &&
+ statusErr.HTTPStatus() == http.StatusForbidden &&
+ token != h.Cluster.Users.AnonymousUserToken {
+ // collection id is outside scope of supplied
+ // token
+ tokenScopeProblem = true
+ sess.Release()
+ continue
+ } else if os.IsNotExist(err) {
+ // collection does not exist or is not
+ // readable using this token
+ sess.Release()
+ continue
+ } else if err != nil {
+ http.Error(w, err.Error(), http.StatusInternalServerError)
+ sess.Release()
+ return
+ }
+ defer f.Close()
+
+ collectionDir, sessionFS, session, tokenUser = f, fs, sess, user
+ break
+ }
+
+ // releaseSession() is equivalent to session.Release() except
+ // that it's a no-op if (1) session is nil, or (2) it has
+ // already been called.
+ //
+ // This way, we can do a defer call here to ensure it gets
+ // called in all code paths, and also call it inline (see
+ // below) in the cases where we want to release the lock
+ // before returning.
+ releaseSession := func() {}
+ if session != nil {
+ var releaseSessionOnce sync.Once
+ releaseSession = func() { releaseSessionOnce.Do(func() { session.Release() }) }
+ }
+ defer releaseSession()
+
+ if forceReload && collectionDir != nil {
+ err := collectionDir.Sync()
+ if err != nil {
+ if he := errorWithHTTPStatus(nil); errors.As(err, &he) {
+ http.Error(w, err.Error(), he.HTTPStatus())
+ } else {
+ http.Error(w, err.Error(), http.StatusInternalServerError)
}
+ return
}
- // Something more serious is wrong
- http.Error(w, "cache error: "+err.Error(), http.StatusInternalServerError)
- return
}
- if collection == nil {
- if pathToken || !credentialsOK {
- // Either the URL is a "secret sharing link"
- // that didn't work out (and asking the client
- // for additional credentials would just be
- // confusing), or we don't even accept
- // credentials at this path.
+ if session == nil {
+ if pathToken {
+ // The URL is a "secret sharing link" that
+ // didn't work out. Asking the client for
+ // additional credentials would just be
+ // confusing.
http.Error(w, notFoundMessage, http.StatusNotFound)
return
}
- for _, t := range reqTokens {
- if tokenResult[t] == 404 {
- // The client provided valid token(s), but the
- // collection was not found.
- http.Error(w, notFoundMessage, http.StatusNotFound)
- return
- }
+ if tokenValid {
+ // The client provided valid token(s), but the
+ // collection was not found.
+ http.Error(w, notFoundMessage, http.StatusNotFound)
+ return
+ }
+ if tokenScopeProblem {
+ // The client provided a valid token but
+ // fetching a collection returned 401, which
+ // means the token scope doesn't permit
+ // fetching that collection.
+ http.Error(w, notFoundMessage, http.StatusForbidden)
+ return
}
// The client's token was invalid (e.g., expired), or
// the client didn't even provide one. Redirect to
target.RawQuery = redirkey + "=" + callback
w.Header().Add("Location", target.String())
w.WriteHeader(http.StatusSeeOther)
- } else {
- w.Header().Add("WWW-Authenticate", "Basic realm=\"collections\"")
- http.Error(w, unauthorizedMessage, http.StatusUnauthorized)
+ return
}
+ if !credentialsOK {
+ http.Error(w, fmt.Sprintf("Authorization tokens are not accepted here: %v, and no anonymous user token is configured.", reasonNotAcceptingCredentials), http.StatusUnauthorized)
+ return
+ }
+ // If none of the above cases apply, suggest the
+ // user-agent (which is either a non-browser agent
+ // like wget, or a browser that can't redirect through
+ // a login flow) prompt the user for credentials.
+ w.Header().Add("WWW-Authenticate", "Basic realm=\"collections\"")
+ http.Error(w, unauthorizedMessage, http.StatusUnauthorized)
return
}
- kc, err := keepclient.MakeKeepClient(arv)
- if err != nil {
- http.Error(w, "error setting up keep client: "+err.Error(), http.StatusInternalServerError)
- return
+ if r.Method == http.MethodGet || r.Method == http.MethodHead {
+ targetfnm := fsprefix + strings.Join(pathParts[stripParts:], "/")
+ if fi, err := sessionFS.Stat(targetfnm); err == nil && fi.IsDir() {
+ releaseSession() // because we won't be writing anything
+ if !strings.HasSuffix(r.URL.Path, "/") {
+ h.seeOtherWithCookie(w, r, r.URL.Path+"/", credentialsOK)
+ } else {
+ h.serveDirectory(w, r, fi.Name(), sessionFS, targetfnm, !useSiteFS)
+ }
+ return
+ }
}
- kc.RequestID = r.Header.Get("X-Request-Id")
var basename string
if len(targetPath) > 0 {
basename = targetPath[len(targetPath)-1]
}
- applyContentDispositionHdr(w, r, basename, attachment)
-
- client := (&arvados.Client{
- APIHost: arv.ApiServer,
- AuthToken: arv.ApiToken,
- Insecure: arv.ApiInsecure,
- }).WithRequestID(r.Header.Get("X-Request-Id"))
-
- fs, err := collection.FileSystem(client, kc)
- if err != nil {
- http.Error(w, "error creating collection filesystem: "+err.Error(), http.StatusInternalServerError)
+ if arvadosclient.PDHMatch(collectionID) && writeMethod[r.Method] {
+ http.Error(w, webdavfs.ErrReadOnly.Error(), http.StatusMethodNotAllowed)
return
}
-
- writefs, writeOK := fs.(arvados.CollectionFileSystem)
- targetIsPDH := arvadosclient.PDHMatch(collectionID)
- if (targetIsPDH || !writeOK) && writeMethod[r.Method] {
- http.Error(w, errReadOnly.Error(), http.StatusMethodNotAllowed)
+ if !h.userPermittedToUploadOrDownload(r.Method, tokenUser) {
+ http.Error(w, "Not permitted", http.StatusForbidden)
return
}
+ h.logUploadOrDownload(r, session.arvadosclient, sessionFS, fsprefix+strings.Join(targetPath, "/"), nil, tokenUser)
- // Check configured permission
- _, sess, err := h.Cache.GetSession(arv.ApiToken)
- tokenUser, err = h.Cache.GetTokenUser(arv.ApiToken)
+ writing := writeMethod[r.Method]
+ locker := h.collectionLock(collectionID, writing)
+ defer locker.Unlock()
- if webdavMethod[r.Method] {
- if !h.userPermittedToUploadOrDownload(r.Method, tokenUser) {
- http.Error(w, "Not permitted", http.StatusForbidden)
+ if writing {
+ // Save the collection only if/when all
+ // webdav->filesystem operations succeed --
+ // and send a 500 error if the modified
+ // collection can't be saved.
+ //
+ // Perform the write in a separate sitefs, so
+ // concurrent read operations on the same
+ // collection see the previous saved
+ // state. After the write succeeds and the
+ // collection record is updated, we reset the
+ // session so the updates are visible in
+ // subsequent read requests.
+ client := session.client.WithRequestID(r.Header.Get("X-Request-Id"))
+ sessionFS = client.SiteFileSystem(session.keepclient)
+ writingDir, err := sessionFS.OpenFile(fsprefix, os.O_RDONLY, 0)
+ if err != nil {
+ http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
- h.logUploadOrDownload(r, sess.arvadosclient, nil, strings.Join(targetPath, "/"), collection, tokenUser)
-
- if writeMethod[r.Method] {
- // Save the collection only if/when all
- // webdav->filesystem operations succeed --
- // and send a 500 error if the modified
- // collection can't be saved.
- w = &updateOnSuccess{
- ResponseWriter: w,
- logger: ctxlog.FromContext(r.Context()),
- update: func() error {
- return h.Cache.Update(client, *collection, writefs)
- }}
- }
- h := webdav.Handler{
- Prefix: "/" + strings.Join(pathParts[:stripParts], "/"),
- FileSystem: &webdavFS{
- collfs: fs,
- writing: writeMethod[r.Method],
- alwaysReadEOF: r.Method == "PROPFIND",
- },
- LockSystem: h.webdavLS,
- Logger: func(_ *http.Request, err error) {
+ defer writingDir.Close()
+ w = &updateOnSuccess{
+ ResponseWriter: w,
+ logger: ctxlog.FromContext(r.Context()),
+ update: func() error {
+ err := writingDir.Sync()
+ var te arvados.TransactionError
+ if errors.As(err, &te) {
+ err = te
+ }
+ if err != nil {
+ return err
+ }
+ // Sync the changes to the persistent
+ // sessionfs for this token.
+ snap, err := writingDir.Snapshot()
if err != nil {
- ctxlog.FromContext(r.Context()).WithError(err).Error("error reported by webdav handler")
+ return err
}
- },
- }
- h.ServeHTTP(w, r)
- return
- }
-
- openPath := "/" + strings.Join(targetPath, "/")
- f, err := fs.Open(openPath)
- if os.IsNotExist(err) {
- // Requested non-existent path
- http.Error(w, notFoundMessage, http.StatusNotFound)
- return
- } else if err != nil {
- // Some other (unexpected) error
- http.Error(w, "open: "+err.Error(), http.StatusInternalServerError)
- return
- }
- defer f.Close()
- if stat, err := f.Stat(); err != nil {
- // Can't get Size/IsDir (shouldn't happen with a collectionFS!)
- http.Error(w, "stat: "+err.Error(), http.StatusInternalServerError)
- } else if stat.IsDir() && !strings.HasSuffix(r.URL.Path, "/") {
- // If client requests ".../dirname", redirect to
- // ".../dirname/". This way, relative links in the
- // listing for "dirname" can always be "fnm", never
- // "dirname/fnm".
- h.seeOtherWithCookie(w, r, r.URL.Path+"/", credentialsOK)
- } else if stat.IsDir() {
- h.serveDirectory(w, r, collection.Name, fs, openPath, true)
+ collectionDir.Splice(snap)
+ return nil
+ }}
} else {
- if !h.userPermittedToUploadOrDownload(r.Method, tokenUser) {
- http.Error(w, "Not permitted", http.StatusForbidden)
- return
- }
- h.logUploadOrDownload(r, sess.arvadosclient, nil, strings.Join(targetPath, "/"), collection, tokenUser)
-
- http.ServeContent(w, r, basename, stat.ModTime(), f)
- if wrote := int64(w.WroteBodyBytes()); wrote != stat.Size() && w.WroteStatus() == http.StatusOK {
- // If we wrote fewer bytes than expected, it's
- // too late to change the real response code
- // or send an error message to the client, but
- // at least we can try to put some useful
- // debugging info in the logs.
- n, err := f.Read(make([]byte, 1024))
- ctxlog.FromContext(r.Context()).Errorf("stat.Size()==%d but only wrote %d bytes; read(1024) returns %d, %v", stat.Size(), wrote, n, err)
- }
- }
-}
-
-func (h *handler) getClients(reqID, token string) (arv *arvadosclient.ArvadosClient, kc *keepclient.KeepClient, client *arvados.Client, release func(), err error) {
- arv = h.clientPool.Get()
- if arv == nil {
- err = h.clientPool.Err()
- return
- }
- release = func() { h.clientPool.Put(arv) }
- arv.ApiToken = token
- kc, err = keepclient.MakeKeepClient(arv)
- if err != nil {
- release()
- return
- }
- kc.RequestID = reqID
- client = (&arvados.Client{
- APIHost: arv.ApiServer,
- AuthToken: arv.ApiToken,
- Insecure: arv.ApiInsecure,
- }).WithRequestID(reqID)
- return
-}
-
-func (h *handler) serveSiteFS(w http.ResponseWriter, r *http.Request, tokens []string, credentialsOK, attachment bool) {
- if len(tokens) == 0 {
- w.Header().Add("WWW-Authenticate", "Basic realm=\"collections\"")
- http.Error(w, unauthorizedMessage, http.StatusUnauthorized)
- return
- }
- if writeMethod[r.Method] {
- http.Error(w, errReadOnly.Error(), http.StatusMethodNotAllowed)
- return
- }
-
- fs, sess, err := h.Cache.GetSession(tokens[0])
- if err != nil {
- http.Error(w, err.Error(), http.StatusInternalServerError)
- return
- }
- fs.ForwardSlashNameSubstitution(h.Cluster.Collections.ForwardSlashNameSubstitution)
- f, err := fs.Open(r.URL.Path)
- if os.IsNotExist(err) {
- http.Error(w, err.Error(), http.StatusNotFound)
- return
- } else if err != nil {
- http.Error(w, err.Error(), http.StatusInternalServerError)
- return
- }
- defer f.Close()
- if fi, err := f.Stat(); err == nil && fi.IsDir() && r.Method == "GET" {
- if !strings.HasSuffix(r.URL.Path, "/") {
- h.seeOtherWithCookie(w, r, r.URL.Path+"/", credentialsOK)
- } else {
- h.serveDirectory(w, r, fi.Name(), fs, r.URL.Path, false)
- }
- return
- }
-
- tokenUser, err := h.Cache.GetTokenUser(tokens[0])
- if !h.userPermittedToUploadOrDownload(r.Method, tokenUser) {
- http.Error(w, "Not permitted", http.StatusForbidden)
- return
- }
- h.logUploadOrDownload(r, sess.arvadosclient, fs, r.URL.Path, nil, tokenUser)
-
- if r.Method == "GET" {
- _, basename := filepath.Split(r.URL.Path)
+ // When writing, we need to block session renewal
+ // until we're finished, in order to guarantee the
+ // effect of the write is visible in future responses.
+ // But if we're not writing, we can release the lock
+ // early. This enables us to keep renewing sessions
+ // and processing more requests even if a slow client
+ // takes a long time to download a large file.
+ releaseSession()
+ }
+ if r.Method == http.MethodGet {
applyContentDispositionHdr(w, r, basename, attachment)
}
- wh := webdav.Handler{
- Prefix: "/",
- FileSystem: &webdavFS{
- collfs: fs,
- writing: writeMethod[r.Method],
- alwaysReadEOF: r.Method == "PROPFIND",
+ if webdavPrefix == "" {
+ webdavPrefix = "/" + strings.Join(pathParts[:stripParts], "/")
+ }
+ wh := &webdav.Handler{
+ Prefix: webdavPrefix,
+ FileSystem: &webdavfs.FS{
+ FileSystem: sessionFS,
+ Prefix: fsprefix,
+ Writing: writeMethod[r.Method],
+ AlwaysReadEOF: r.Method == "PROPFIND",
},
- LockSystem: h.webdavLS,
- Logger: func(_ *http.Request, err error) {
- if err != nil {
+ LockSystem: webdavfs.NoLockSystem,
+ Logger: func(r *http.Request, err error) {
+ if err != nil && !os.IsNotExist(err) {
ctxlog.FromContext(r.Context()).WithError(err).Error("error reported by webdav handler")
}
},
}
- wh.ServeHTTP(w, r)
+ h.metrics.track(wh, w, r)
+ if r.Method == http.MethodGet && w.WroteStatus() == http.StatusOK {
+ wrote := int64(w.WroteBodyBytes())
+ fnm := strings.Join(pathParts[stripParts:], "/")
+ fi, err := wh.FileSystem.Stat(r.Context(), fnm)
+ if err == nil && fi.Size() != wrote {
+ var n int
+ f, err := wh.FileSystem.OpenFile(r.Context(), fnm, os.O_RDONLY, 0)
+ if err == nil {
+ n, err = f.Read(make([]byte, 1024))
+ f.Close()
+ }
+ ctxlog.FromContext(r.Context()).Errorf("stat.Size()==%d but only wrote %d bytes; read(1024) returns %d, %v", fi.Size(), wrote, n, err)
+ }
+ }
}
var dirListingTemplate = `<!DOCTYPE HTML>
}
func (h *handler) seeOtherWithCookie(w http.ResponseWriter, r *http.Request, location string, credentialsOK bool) {
- if formToken := r.FormValue("api_token"); formToken != "" {
+ if formTokens, haveFormTokens := r.Form["api_token"]; haveFormTokens {
if !credentialsOK {
// It is not safe to copy the provided token
// into a cookie unless the current vhost
// bar, and in the case of a POST request to avoid
// raising warnings when the user refreshes the
// resulting page.
- http.SetCookie(w, &http.Cookie{
- Name: "arvados_api_token",
- Value: auth.EncodeTokenCookie([]byte(formToken)),
- Path: "/",
- HttpOnly: true,
- SameSite: http.SameSiteLaxMode,
- })
+ for _, tok := range formTokens {
+ if tok == "" {
+ continue
+ }
+ http.SetCookie(w, &http.Cookie{
+ Name: "arvados_api_token",
+ Value: auth.EncodeTokenCookie([]byte(tok)),
+ Path: "/",
+ HttpOnly: true,
+ SameSite: http.SameSiteLaxMode,
+ })
+ break
+ }
}
// Propagate query parameters (except api_token) from
func (h *handler) determineCollection(fs arvados.CustomFileSystem, path string) (*arvados.Collection, string) {
target := strings.TrimSuffix(path, "/")
- for {
+ for cut := len(target); cut >= 0; cut = strings.LastIndexByte(target, '/') {
+ target = target[:cut]
fi, err := fs.Stat(target)
- if err != nil {
+ if os.IsNotExist(err) {
+ // creating a new file/dir, or download
+ // destined to fail
+ continue
+ } else if err != nil {
return nil, ""
}
switch src := fi.Sys().(type) {
return nil, ""
}
}
- // Try parent
- cut := strings.LastIndexByte(target, '/')
- if cut < 0 {
- return nil, ""
+ }
+ return nil, ""
+}
+
+var lockTidyInterval = time.Minute * 10
+
+// Lock the specified collection for reading or writing. Caller must
+// call Unlock() on the returned Locker when the operation is
+// finished.
+func (h *handler) collectionLock(collectionID string, writing bool) sync.Locker {
+ h.lockMtx.Lock()
+ defer h.lockMtx.Unlock()
+ if time.Since(h.lockTidied) > lockTidyInterval {
+ // Periodically delete all locks that aren't in use.
+ h.lockTidied = time.Now()
+ for id, locker := range h.lock {
+ if locker.TryLock() {
+ locker.Unlock()
+ delete(h.lock, id)
+ }
}
- target = target[:cut]
}
+ locker := h.lock[collectionID]
+ if locker == nil {
+ locker = new(sync.RWMutex)
+ if h.lock == nil {
+ h.lock = map[string]*sync.RWMutex{}
+ }
+ h.lock[collectionID] = locker
+ }
+ if writing {
+ locker.Lock()
+ return locker
+ } else {
+ locker.RLock()
+ return locker.RLocker()
+ }
+}
+
+func ServeCORSPreflight(w http.ResponseWriter, header http.Header) bool {
+ method := header.Get("Access-Control-Request-Method")
+ if method == "" {
+ return false
+ }
+ if !browserMethod[method] && !webdavMethod[method] {
+ w.WriteHeader(http.StatusMethodNotAllowed)
+ return true
+ }
+ w.Header().Set("Access-Control-Allow-Headers", corsAllowHeadersHeader)
+ w.Header().Set("Access-Control-Allow-Methods", "COPY, DELETE, GET, LOCK, MKCOL, MOVE, OPTIONS, POST, PROPFIND, PROPPATCH, PUT, RMCOL, UNLOCK")
+ w.Header().Set("Access-Control-Allow-Origin", "*")
+ w.Header().Set("Access-Control-Max-Age", "86400")
+ return true
}
projects / arvados.git / blobdiff