func (h *shareHandler) serveHTTP(rw http.ResponseWriter, req *http.Request) error {
var err error
pathSuffix := httputil.PathSuffix(req)
if len(pathSuffix) == 0 {
// This happens during testing because we don't go through PrefixHandler
pathSuffix = strings.TrimLeft(req.URL.Path, "/")
}
pathParts := strings.SplitN(pathSuffix, "/", 2)
blobRef, ok := blob.Parse(pathParts[0])
if !ok {
err = &shareError{code: invalidURL, response: badRequest,
message: fmt.Sprintf("Malformed share pathSuffix: %s", pathSuffix)}
} else {
err = handleGetViaSharing(rw, req, blobRef, h.fetcher)
}
if se, ok := err.(*shareError); ok {
switch se.response {
case badRequest:
httputil.BadRequestError(rw, err.Error())
case unauthorizedRequest:
log.Print(err)
auth.SendUnauthorized(rw, req)
}
}
return err
}
func (a *Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
if r.URL.Path == a.masterqueryURLPath {
a.handleMasterQuery(w, r)
return
}
if a.configURLPath != "" && r.URL.Path == a.configURLPath {
if a.auth.AllowedAccess(r)&auth.OpGet == auth.OpGet {
camhttputil.ReturnJSON(w, a.appConfig)
} else {
auth.SendUnauthorized(w, r)
}
return
}
trimmedPath := strings.TrimPrefix(r.URL.Path, a.prefix)
if strings.HasPrefix(trimmedPath, "/search") {
a.handleSearch(w, r)
return
}
if a.proxy == nil {
http.Error(w, "no proxy for the app", 500)
return
}
a.proxy.ServeHTTP(w, r)
}
func (a *Handler) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
if camhttputil.PathSuffix(req) == "config.json" {
if a.auth.AllowedAccess(req)&auth.OpGet == auth.OpGet {
camhttputil.ReturnJSON(rw, a.appConfig)
} else {
auth.SendUnauthorized(rw, req)
}
return
}
if a.proxy == nil {
http.Error(rw, "no proxy for the app", 500)
return
}
a.proxy.ServeHTTP(rw, req)
}
// handleMasterQuery allows an app to register the master query that defines the
// domain limiting all subsequent search queries.
func (a *Handler) handleMasterQuery(w http.ResponseWriter, r *http.Request) {
if !(a.auth.AllowedAccess(r)&auth.OpAll == auth.OpAll) {
auth.SendUnauthorized(w, r)
return
}
if r.Method != http.MethodPost {
http.Error(w, "not a POST", http.StatusMethodNotAllowed)
return
}
if a.sh == nil {
http.Error(w, "app proxy has no search handler", 500)
return
}
if refresh, _ := strconv.ParseBool(r.FormValue("refresh")); refresh {
if err := a.refreshDomainBlobs(); err != nil {
if err == errRefreshSuppress {
http.Error(w, "too many refresh requests", http.StatusTooManyRequests)
} else {
http.Error(w, fmt.Sprintf("%v", err), 500)
}
return
}
w.Write([]byte("OK"))
return
}
sq := new(search.SearchQuery)
if err := sq.FromHTTP(r); err != nil {
http.Error(w, fmt.Sprintf("error reading master query: %v", err), 500)
return
}
var masterQuery search.SearchQuery = *(sq)
des := *(masterQuery.Describe)
masterQuery.Describe = &des
sr, err := a.sh.Query(sq)
if err != nil {
http.Error(w, fmt.Sprintf("error running master query: %v", err), 500)
return
}
a.masterQueryMu.Lock()
defer a.masterQueryMu.Unlock()
a.masterQuery = &masterQuery
a.domainBlobs = make(map[blob.Ref]bool, len(sr.Describe.Meta))
for _, v := range sr.Describe.Meta {
a.domainBlobs[v.BlobRef] = true
}
a.domainBlobsRefresh = time.Now()
w.Write([]byte("OK"))
}
func (h *Handler) ServeHTTP(conn http.ResponseWriter, req *http.Request) {
blobRef := blobFromUrlPath(req.URL.Path)
if blobRef == nil {
http.Error(conn, "Malformed GET URL.", 400)
return
}
switch {
case h.AllowGlobalAccess || auth.Allowed(req, auth.OpGet):
serveBlobRef(conn, req, blobRef, h.Fetcher)
case auth.TriedAuthorization(req):
log.Printf("Attempted authorization failed on %s", req.URL)
auth.SendUnauthorized(conn, req)
default:
handleGetViaSharing(conn, req, blobRef, h.Fetcher)
}
}
func (rh *RootHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
if wantsDiscovery(r) {
if auth.Allowed(r, auth.OpDiscovery) {
rh.serveDiscovery(w, r)
return
}
if !rh.Stealth {
auth.SendUnauthorized(w, r)
}
return
}
if rh.Stealth {
return
}
if r.RequestURI == "/" && rh.ui != nil {
http.Redirect(w, r, "/ui/", http.StatusMovedPermanently)
return
}
if r.URL.Path == "/favicon.ico" {
ServeStaticFile(w, r, Files, "favicon.ico")
return
}
f := func(p string, a ...interface{}) {
fmt.Fprintf(w, p, a...)
}
f("<html><body><p>This is camlistored (%s), a "+
"<a href='http://camlistore.org'>Camlistore</a> server.</p>", buildinfo.Version())
if rh.ui != nil {
f("<p>To manage your content, access the <a href='%s'>%s</a>.</p>", rh.ui.prefix, rh.ui.prefix)
}
if rh.statusRoot != "" {
f("<p>To view status, see <a href='%s'>%s</a>.</p>", rh.statusRoot, rh.statusRoot)
}
if rh.helpRoot != "" {
f("<p>To view more information on accessing the server, see <a href='%s'>%s</a>.</p>", rh.helpRoot, rh.helpRoot)
}
fmt.Fprintf(w, "</body></html>")
}
// Unauthenticated user. Be paranoid.
func handleGetViaSharing(conn http.ResponseWriter, req *http.Request,
blobRef *blobref.BlobRef, fetcher blobref.StreamingFetcher) {
if w, ok := fetcher.(blobserver.ContextWrapper); ok {
fetcher = w.WrapContext(req)
}
viaPathOkay := false
startTime := time.Now()
defer func() {
if !viaPathOkay {
// Insert a delay, to hide timing attacks probing
// for the existence of blobs.
sleep := fetchFailureDelayNs - (time.Now().Sub(startTime))
if sleep > 0 {
time.Sleep(sleep)
}
}
}()
viaBlobs := make([]*blobref.BlobRef, 0)
if via := req.FormValue("via"); via != "" {
for _, vs := range strings.Split(via, ",") {
if br := blobref.Parse(vs); br == nil {
httputil.BadRequestError(conn, "Malformed blobref in via param")
return
} else {
viaBlobs = append(viaBlobs, br)
}
}
}
fetchChain := make([]*blobref.BlobRef, 0)
fetchChain = append(fetchChain, viaBlobs...)
fetchChain = append(fetchChain, blobRef)
for i, br := range fetchChain {
switch i {
case 0:
file, size, err := fetcher.FetchStreaming(br)
if err != nil {
log.Printf("Fetch chain 0 of %s failed: %v", br.String(), err)
auth.SendUnauthorized(conn, req)
return
}
defer file.Close()
if size > maxJSONSize {
log.Printf("Fetch chain 0 of %s too large", br.String())
auth.SendUnauthorized(conn, req)
return
}
jd := json.NewDecoder(file)
m := make(map[string]interface{})
if err := jd.Decode(&m); err != nil {
log.Printf("Fetch chain 0 of %s wasn't JSON: %v", br.String(), err)
auth.SendUnauthorized(conn, req)
return
}
if m["camliType"].(string) != "share" {
log.Printf("Fetch chain 0 of %s wasn't a share", br.String())
auth.SendUnauthorized(conn, req)
return
}
if len(fetchChain) > 1 && fetchChain[1].String() != m["target"].(string) {
log.Printf("Fetch chain 0->1 (%s -> %q) unauthorized, expected hop to %q",
br.String(), fetchChain[1].String(), m["target"])
auth.SendUnauthorized(conn, req)
return
}
case len(fetchChain) - 1:
// Last one is fine (as long as its path up to here has been proven, and it's
// not the first thing in the chain)
continue
default:
file, _, err := fetcher.FetchStreaming(br)
if err != nil {
log.Printf("Fetch chain %d of %s failed: %v", i, br.String(), err)
auth.SendUnauthorized(conn, req)
return
}
defer file.Close()
lr := io.LimitReader(file, maxJSONSize)
slurpBytes, err := ioutil.ReadAll(lr)
if err != nil {
log.Printf("Fetch chain %d of %s failed in slurp: %v", i, br.String(), err)
auth.SendUnauthorized(conn, req)
return
}
saught := fetchChain[i+1].String()
if bytes.IndexAny(slurpBytes, saught) == -1 {
log.Printf("Fetch chain %d of %s failed; no reference to %s",
i, br.String(), saught)
auth.SendUnauthorized(conn, req)
return
}
}
}
viaPathOkay = true
serveBlobRef(conn, req, blobRef, fetcher)
}
// Unauthenticated user. Be paranoid.
func handleGetViaSharing(conn http.ResponseWriter, req *http.Request,
blobRef blob.Ref, fetcher blob.StreamingFetcher) {
if req.Method != "GET" && req.Method != "HEAD" {
httputil.BadRequestError(conn, "Invalid method")
return
}
viaPathOkay := false
startTime := time.Now()
defer func() {
if !viaPathOkay {
// Insert a delay, to hide timing attacks probing
// for the existence of blobs.
sleep := fetchFailureDelay - (time.Now().Sub(startTime))
time.Sleep(sleep)
}
}()
viaBlobs := make([]blob.Ref, 0)
if via := req.FormValue("via"); via != "" {
for _, vs := range strings.Split(via, ",") {
if br, ok := blob.Parse(vs); ok {
viaBlobs = append(viaBlobs, br)
} else {
httputil.BadRequestError(conn, "Malformed blobref in via param")
return
}
}
}
fetchChain := make([]blob.Ref, 0)
fetchChain = append(fetchChain, viaBlobs...)
fetchChain = append(fetchChain, blobRef)
for i, br := range fetchChain {
switch i {
case 0:
file, size, err := fetcher.FetchStreaming(br)
if err != nil {
log.Printf("Fetch chain 0 of %s failed: %v", br.String(), err)
auth.SendUnauthorized(conn, req)
return
}
defer file.Close()
if size > schema.MaxSchemaBlobSize {
log.Printf("Fetch chain 0 of %s too large", br.String())
auth.SendUnauthorized(conn, req)
return
}
blob, err := schema.BlobFromReader(br, file)
if err != nil {
log.Printf("Can't create a blob from %v: %v", br.String(), err)
auth.SendUnauthorized(conn, req)
return
}
share, ok := blob.AsShare()
if !ok {
log.Printf("Fetch chain 0 of %s wasn't a valid Share", br.String())
auth.SendUnauthorized(conn, req)
return
}
if len(fetchChain) > 1 && fetchChain[1].String() != share.Target().String() {
log.Printf("Fetch chain 0->1 (%s -> %q) unauthorized, expected hop to %q",
br.String(), fetchChain[1].String(), share.Target().String())
auth.SendUnauthorized(conn, req)
return
}
case len(fetchChain) - 1:
// Last one is fine (as long as its path up to here has been proven, and it's
// not the first thing in the chain)
continue
default:
file, _, err := fetcher.FetchStreaming(br)
if err != nil {
log.Printf("Fetch chain %d of %s failed: %v", i, br.String(), err)
auth.SendUnauthorized(conn, req)
return
}
defer file.Close()
lr := io.LimitReader(file, schema.MaxSchemaBlobSize)
slurpBytes, err := ioutil.ReadAll(lr)
if err != nil {
log.Printf("Fetch chain %d of %s failed in slurp: %v", i, br.String(), err)
auth.SendUnauthorized(conn, req)
return
}
saught := fetchChain[i+1].String()
if bytes.IndexAny(slurpBytes, saught) == -1 {
log.Printf("Fetch chain %d of %s failed; no reference to %s",
i, br.String(), saught)
auth.SendUnauthorized(conn, req)
return
}
}
}
viaPathOkay = true
gethandler.ServeBlobRef(conn, req, blobRef, fetcher)
}
