4e63e0e372
This PR adds code to appropriately handle versioning issues that come up quite constantly across our API changes. Currently we were also routing our requests wrong which sort of made it harder to write a consistent error handling code to appropriately reject or honor requests. This PR potentially fixes issues - old mc is used against new minio release which is incompatible returns an appropriate for client action. - any older servers talking to each other, report appropriate error - incompatible peer servers should report error and reject the calls with appropriate error
618 lines
19 KiB
Go
618 lines
19 KiB
Go
/*
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* MinIO Cloud Storage, (C) 2018 MinIO, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package cmd
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import (
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"context"
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"encoding/gob"
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"encoding/hex"
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"errors"
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"fmt"
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"io"
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"net/http"
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"path"
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"strconv"
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"time"
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"github.com/gorilla/mux"
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"github.com/minio/minio/cmd/config"
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xhttp "github.com/minio/minio/cmd/http"
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"github.com/minio/minio/cmd/logger"
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)
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var errDiskStale = errors.New("disk stale")
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// To abstract a disk over network.
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type storageRESTServer struct {
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storage *posix
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}
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func (s *storageRESTServer) writeErrorResponse(w http.ResponseWriter, err error) {
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w.WriteHeader(http.StatusForbidden)
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w.Write([]byte(err.Error()))
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w.(http.Flusher).Flush()
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}
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// DefaultSkewTime - skew time is 15 minutes between minio peers.
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const DefaultSkewTime = 15 * time.Minute
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// Authenticates storage client's requests and validates for skewed time.
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func storageServerRequestValidate(r *http.Request) error {
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_, owner, err := webRequestAuthenticate(r)
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if err != nil {
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return err
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}
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if !owner { // Disable access for non-admin users.
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return errAuthentication
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}
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requestTimeStr := r.Header.Get("X-Minio-Time")
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requestTime, err := time.Parse(time.RFC3339, requestTimeStr)
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if err != nil {
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return err
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}
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utcNow := UTCNow()
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delta := requestTime.Sub(utcNow)
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if delta < 0 {
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delta = delta * -1
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}
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if delta > DefaultSkewTime {
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return fmt.Errorf("client time %v is too apart with server time %v", requestTime, utcNow)
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}
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return nil
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}
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// IsValid - To authenticate and verify the time difference.
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func (s *storageRESTServer) IsValid(w http.ResponseWriter, r *http.Request) bool {
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if err := storageServerRequestValidate(r); err != nil {
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s.writeErrorResponse(w, err)
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return false
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}
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diskID := r.URL.Query().Get(storageRESTDiskID)
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if diskID == "" {
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// Request sent empty disk-id, we allow the request
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// as the peer might be coming up and trying to read format.json
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// or create format.json
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return true
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}
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storedDiskID, err := s.storage.getDiskID()
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if err == nil && diskID == storedDiskID {
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// If format.json is available and request sent the right disk-id, we allow the request
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return true
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}
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s.writeErrorResponse(w, errDiskStale)
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return false
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}
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// DiskInfoHandler - returns disk info.
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func (s *storageRESTServer) DiskInfoHandler(w http.ResponseWriter, r *http.Request) {
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if !s.IsValid(w, r) {
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return
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}
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info, err := s.storage.DiskInfo()
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if err != nil {
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s.writeErrorResponse(w, err)
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return
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}
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defer w.(http.Flusher).Flush()
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gob.NewEncoder(w).Encode(info)
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}
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// MakeVolHandler - make a volume.
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func (s *storageRESTServer) MakeVolHandler(w http.ResponseWriter, r *http.Request) {
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if !s.IsValid(w, r) {
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return
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}
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vars := mux.Vars(r)
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volume := vars[storageRESTVolume]
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err := s.storage.MakeVol(volume)
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if err != nil {
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s.writeErrorResponse(w, err)
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}
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}
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// ListVolsHandler - list volumes.
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func (s *storageRESTServer) ListVolsHandler(w http.ResponseWriter, r *http.Request) {
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if !s.IsValid(w, r) {
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return
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}
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infos, err := s.storage.ListVols()
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if err != nil {
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s.writeErrorResponse(w, err)
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return
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}
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gob.NewEncoder(w).Encode(&infos)
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w.(http.Flusher).Flush()
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}
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// StatVolHandler - stat a volume.
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func (s *storageRESTServer) StatVolHandler(w http.ResponseWriter, r *http.Request) {
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if !s.IsValid(w, r) {
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return
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}
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vars := mux.Vars(r)
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volume := vars[storageRESTVolume]
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info, err := s.storage.StatVol(volume)
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if err != nil {
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s.writeErrorResponse(w, err)
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return
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}
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gob.NewEncoder(w).Encode(info)
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w.(http.Flusher).Flush()
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}
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// DeleteVolumeHandler - delete a volume.
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func (s *storageRESTServer) DeleteVolHandler(w http.ResponseWriter, r *http.Request) {
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if !s.IsValid(w, r) {
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return
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}
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vars := mux.Vars(r)
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volume := vars[storageRESTVolume]
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err := s.storage.DeleteVol(volume)
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if err != nil {
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s.writeErrorResponse(w, err)
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}
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}
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// AppendFileHandler - append data from the request to the file specified.
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func (s *storageRESTServer) AppendFileHandler(w http.ResponseWriter, r *http.Request) {
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if !s.IsValid(w, r) {
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return
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}
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vars := mux.Vars(r)
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volume := vars[storageRESTVolume]
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filePath := vars[storageRESTFilePath]
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buf := make([]byte, r.ContentLength)
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_, err := io.ReadFull(r.Body, buf)
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if err != nil {
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s.writeErrorResponse(w, err)
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return
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}
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err = s.storage.AppendFile(volume, filePath, buf)
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if err != nil {
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s.writeErrorResponse(w, err)
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}
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}
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// CreateFileHandler - fallocate() space for a file and copy the contents from the request.
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func (s *storageRESTServer) CreateFileHandler(w http.ResponseWriter, r *http.Request) {
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if !s.IsValid(w, r) {
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return
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}
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vars := mux.Vars(r)
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volume := vars[storageRESTVolume]
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filePath := vars[storageRESTFilePath]
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fileSizeStr := vars[storageRESTLength]
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fileSize, err := strconv.Atoi(fileSizeStr)
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if err != nil {
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s.writeErrorResponse(w, err)
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return
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}
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err = s.storage.CreateFile(volume, filePath, int64(fileSize), r.Body)
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if err != nil {
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s.writeErrorResponse(w, err)
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}
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}
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// WriteAllHandler - write to file all content.
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func (s *storageRESTServer) WriteAllHandler(w http.ResponseWriter, r *http.Request) {
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if !s.IsValid(w, r) {
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return
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}
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vars := mux.Vars(r)
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volume := vars[storageRESTVolume]
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filePath := vars[storageRESTFilePath]
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if r.ContentLength < 0 {
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s.writeErrorResponse(w, errInvalidArgument)
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return
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}
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err := s.storage.WriteAll(volume, filePath, io.LimitReader(r.Body, r.ContentLength))
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if err != nil {
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s.writeErrorResponse(w, err)
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}
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}
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// StatFileHandler - stat a file.
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func (s *storageRESTServer) StatFileHandler(w http.ResponseWriter, r *http.Request) {
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if !s.IsValid(w, r) {
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return
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}
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vars := mux.Vars(r)
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volume := vars[storageRESTVolume]
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filePath := vars[storageRESTFilePath]
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info, err := s.storage.StatFile(volume, filePath)
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if err != nil {
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s.writeErrorResponse(w, err)
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return
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}
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gob.NewEncoder(w).Encode(info)
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w.(http.Flusher).Flush()
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}
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// ReadAllHandler - read all the contents of a file.
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func (s *storageRESTServer) ReadAllHandler(w http.ResponseWriter, r *http.Request) {
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if !s.IsValid(w, r) {
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return
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}
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vars := mux.Vars(r)
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volume := vars[storageRESTVolume]
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filePath := vars[storageRESTFilePath]
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buf, err := s.storage.ReadAll(volume, filePath)
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if err != nil {
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s.writeErrorResponse(w, err)
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return
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}
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w.Header().Set(xhttp.ContentLength, strconv.Itoa(len(buf)))
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w.Write(buf)
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w.(http.Flusher).Flush()
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}
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// ReadFileHandler - read section of a file.
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func (s *storageRESTServer) ReadFileHandler(w http.ResponseWriter, r *http.Request) {
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if !s.IsValid(w, r) {
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return
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}
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vars := mux.Vars(r)
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volume := vars[storageRESTVolume]
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filePath := vars[storageRESTFilePath]
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offset, err := strconv.Atoi(vars[storageRESTOffset])
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if err != nil {
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s.writeErrorResponse(w, err)
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return
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}
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length, err := strconv.Atoi(vars[storageRESTLength])
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if err != nil {
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s.writeErrorResponse(w, err)
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return
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}
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if offset < 0 || length < 0 {
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s.writeErrorResponse(w, errInvalidArgument)
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return
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}
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var verifier *BitrotVerifier
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if vars[storageRESTBitrotAlgo] != "" {
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hashStr := vars[storageRESTBitrotHash]
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var hash []byte
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hash, err = hex.DecodeString(hashStr)
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if err != nil {
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s.writeErrorResponse(w, err)
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return
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}
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verifier = NewBitrotVerifier(BitrotAlgorithmFromString(vars[storageRESTBitrotAlgo]), hash)
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}
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buf := make([]byte, length)
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_, err = s.storage.ReadFile(volume, filePath, int64(offset), buf, verifier)
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if err != nil {
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s.writeErrorResponse(w, err)
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return
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}
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w.Header().Set(xhttp.ContentLength, strconv.Itoa(len(buf)))
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w.Write(buf)
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w.(http.Flusher).Flush()
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}
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// ReadFileHandler - read section of a file.
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func (s *storageRESTServer) ReadFileStreamHandler(w http.ResponseWriter, r *http.Request) {
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if !s.IsValid(w, r) {
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return
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}
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vars := mux.Vars(r)
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volume := vars[storageRESTVolume]
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filePath := vars[storageRESTFilePath]
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offset, err := strconv.Atoi(vars[storageRESTOffset])
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if err != nil {
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s.writeErrorResponse(w, err)
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return
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}
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length, err := strconv.Atoi(vars[storageRESTLength])
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if err != nil {
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s.writeErrorResponse(w, err)
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return
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}
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rc, err := s.storage.ReadFileStream(volume, filePath, int64(offset), int64(length))
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if err != nil {
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s.writeErrorResponse(w, err)
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return
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}
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defer rc.Close()
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w.Header().Set(xhttp.ContentLength, strconv.Itoa(length))
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io.Copy(w, rc)
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w.(http.Flusher).Flush()
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}
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// readMetadata func provides the function types for reading leaf metadata.
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type readMetadataFunc func(buf []byte, volume, entry string) FileInfo
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func readMetadata(buf []byte, volume, entry string) FileInfo {
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m, err := xlMetaV1UnmarshalJSON(context.Background(), buf)
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if err != nil {
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return FileInfo{}
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}
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return FileInfo{
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Volume: volume,
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Name: entry,
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ModTime: m.Stat.ModTime,
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Size: m.Stat.Size,
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Metadata: m.Meta,
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Parts: m.Parts,
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Quorum: m.Erasure.DataBlocks,
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}
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}
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// WalkHandler - remote caller to start walking at a requested directory path.
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func (s *storageRESTServer) WalkHandler(w http.ResponseWriter, r *http.Request) {
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if !s.IsValid(w, r) {
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return
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}
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vars := mux.Vars(r)
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volume := vars[storageRESTVolume]
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dirPath := vars[storageRESTDirPath]
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markerPath := vars[storageRESTMarkerPath]
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recursive, err := strconv.ParseBool(vars[storageRESTRecursive])
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if err != nil {
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s.writeErrorResponse(w, err)
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return
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}
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leafFile := vars[storageRESTLeafFile]
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endWalkCh := make(chan struct{})
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defer close(endWalkCh)
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fch, err := s.storage.Walk(volume, dirPath, markerPath, recursive, leafFile, readMetadata, endWalkCh)
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if err != nil {
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s.writeErrorResponse(w, err)
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return
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}
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w.Header().Set(xhttp.ContentType, "text/event-stream")
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encoder := gob.NewEncoder(w)
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for fi := range fch {
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encoder.Encode(&fi)
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}
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w.(http.Flusher).Flush()
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}
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// ListDirHandler - list a directory.
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func (s *storageRESTServer) ListDirHandler(w http.ResponseWriter, r *http.Request) {
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if !s.IsValid(w, r) {
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return
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}
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vars := mux.Vars(r)
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volume := vars[storageRESTVolume]
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dirPath := vars[storageRESTDirPath]
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leafFile := vars[storageRESTLeafFile]
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count, err := strconv.Atoi(vars[storageRESTCount])
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if err != nil {
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s.writeErrorResponse(w, err)
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return
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}
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entries, err := s.storage.ListDir(volume, dirPath, count, leafFile)
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if err != nil {
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s.writeErrorResponse(w, err)
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return
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}
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gob.NewEncoder(w).Encode(&entries)
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w.(http.Flusher).Flush()
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}
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// DeleteFileHandler - delete a file.
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func (s *storageRESTServer) DeleteFileHandler(w http.ResponseWriter, r *http.Request) {
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if !s.IsValid(w, r) {
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return
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}
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vars := mux.Vars(r)
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volume := vars[storageRESTVolume]
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filePath := vars[storageRESTFilePath]
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err := s.storage.DeleteFile(volume, filePath)
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if err != nil {
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s.writeErrorResponse(w, err)
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}
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}
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// DeleteFileBulkErrsResp - collection of deleteFile errors
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// for bulk deletes
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type DeleteFileBulkErrsResp struct {
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Errs []error
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}
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// DeleteFileError - error captured per delete operation
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type DeleteFileError string
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func (d DeleteFileError) Error() string {
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return string(d)
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}
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// DeleteFileBulkHandler - delete a file.
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func (s *storageRESTServer) DeleteFileBulkHandler(w http.ResponseWriter, r *http.Request) {
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if !s.IsValid(w, r) {
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return
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}
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vars := r.URL.Query()
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volume := vars.Get(storageRESTVolume)
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filePaths := vars[storageRESTFilePath]
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errs, err := s.storage.DeleteFileBulk(volume, filePaths)
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if err != nil {
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s.writeErrorResponse(w, err)
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return
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}
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derrsResp := &DeleteFileBulkErrsResp{Errs: make([]error, len(errs))}
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for idx, err := range errs {
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if err != nil {
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derrsResp.Errs[idx] = DeleteFileError(err.Error())
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}
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}
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gob.NewEncoder(w).Encode(derrsResp)
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w.(http.Flusher).Flush()
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}
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// RenameFileHandler - rename a file.
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func (s *storageRESTServer) RenameFileHandler(w http.ResponseWriter, r *http.Request) {
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if !s.IsValid(w, r) {
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return
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}
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vars := mux.Vars(r)
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srcVolume := vars[storageRESTSrcVolume]
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srcFilePath := vars[storageRESTSrcPath]
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dstVolume := vars[storageRESTDstVolume]
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dstFilePath := vars[storageRESTDstPath]
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err := s.storage.RenameFile(srcVolume, srcFilePath, dstVolume, dstFilePath)
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if err != nil {
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s.writeErrorResponse(w, err)
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}
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}
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// Send whitespace to the client to avoid timeouts as bitrot verification can take time on spinning/slow disks.
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func sendWhiteSpaceVerifyFile(w http.ResponseWriter) <-chan struct{} {
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doneCh := make(chan struct{})
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go func() {
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ticker := time.NewTicker(time.Second * 10)
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for {
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select {
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case <-ticker.C:
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w.Write([]byte(" "))
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w.(http.Flusher).Flush()
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case doneCh <- struct{}{}:
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ticker.Stop()
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return
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}
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}
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}()
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return doneCh
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}
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// VerifyFileResp - VerifyFile()'s response.
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type VerifyFileResp struct {
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Err error
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}
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// VerifyFile - Verify the file for bitrot errors.
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func (s *storageRESTServer) VerifyFile(w http.ResponseWriter, r *http.Request) {
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if !s.IsValid(w, r) {
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return
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}
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vars := mux.Vars(r)
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volume := vars[storageRESTVolume]
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filePath := vars[storageRESTFilePath]
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size, err := strconv.ParseInt(vars[storageRESTLength], 10, 0)
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if err != nil {
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s.writeErrorResponse(w, err)
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return
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}
|
|
shardSize, err := strconv.Atoi(vars[storageRESTShardSize])
|
|
if err != nil {
|
|
s.writeErrorResponse(w, err)
|
|
return
|
|
}
|
|
hashStr := vars[storageRESTBitrotHash]
|
|
var hash []byte
|
|
if hashStr != "" {
|
|
hash, err = hex.DecodeString(hashStr)
|
|
if err != nil {
|
|
s.writeErrorResponse(w, err)
|
|
return
|
|
}
|
|
}
|
|
algoStr := vars[storageRESTBitrotAlgo]
|
|
if algoStr == "" {
|
|
s.writeErrorResponse(w, errInvalidArgument)
|
|
return
|
|
}
|
|
w.Header().Set(xhttp.ContentType, "text/event-stream")
|
|
encoder := gob.NewEncoder(w)
|
|
doneCh := sendWhiteSpaceVerifyFile(w)
|
|
err = s.storage.VerifyFile(volume, filePath, size, BitrotAlgorithmFromString(algoStr), hash, int64(shardSize))
|
|
<-doneCh
|
|
vresp := &VerifyFileResp{}
|
|
if err != nil {
|
|
vresp.Err = VerifyFileError(err.Error())
|
|
}
|
|
encoder.Encode(vresp)
|
|
w.(http.Flusher).Flush()
|
|
}
|
|
|
|
// registerStorageRPCRouter - register storage rpc router.
|
|
func registerStorageRESTHandlers(router *mux.Router, endpoints EndpointList) {
|
|
for _, endpoint := range endpoints {
|
|
if !endpoint.IsLocal {
|
|
continue
|
|
}
|
|
storage, err := newPosix(endpoint.Path)
|
|
if err != nil {
|
|
logger.Fatal(config.ErrUnableToWriteInBackend(err),
|
|
"Unable to initialize posix backend")
|
|
}
|
|
|
|
server := &storageRESTServer{storage: storage}
|
|
|
|
subrouter := router.PathPrefix(path.Join(storageRESTPrefix, endpoint.Path)).Subrouter()
|
|
|
|
subrouter.Methods(http.MethodPost).Path(storageRESTVersionPrefix + storageRESTMethodDiskInfo).HandlerFunc(httpTraceHdrs(server.DiskInfoHandler))
|
|
subrouter.Methods(http.MethodPost).Path(storageRESTVersionPrefix + storageRESTMethodMakeVol).HandlerFunc(httpTraceHdrs(server.MakeVolHandler)).Queries(restQueries(storageRESTVolume)...)
|
|
subrouter.Methods(http.MethodPost).Path(storageRESTVersionPrefix + storageRESTMethodStatVol).HandlerFunc(httpTraceHdrs(server.StatVolHandler)).Queries(restQueries(storageRESTVolume)...)
|
|
subrouter.Methods(http.MethodPost).Path(storageRESTVersionPrefix + storageRESTMethodDeleteVol).HandlerFunc(httpTraceHdrs(server.DeleteVolHandler)).Queries(restQueries(storageRESTVolume)...)
|
|
subrouter.Methods(http.MethodPost).Path(storageRESTVersionPrefix + storageRESTMethodListVols).HandlerFunc(httpTraceHdrs(server.ListVolsHandler))
|
|
|
|
subrouter.Methods(http.MethodPost).Path(storageRESTVersionPrefix + storageRESTMethodAppendFile).HandlerFunc(httpTraceHdrs(server.AppendFileHandler)).
|
|
Queries(restQueries(storageRESTVolume, storageRESTFilePath)...)
|
|
subrouter.Methods(http.MethodPost).Path(storageRESTVersionPrefix + storageRESTMethodWriteAll).HandlerFunc(httpTraceHdrs(server.WriteAllHandler)).
|
|
Queries(restQueries(storageRESTVolume, storageRESTFilePath)...)
|
|
subrouter.Methods(http.MethodPost).Path(storageRESTVersionPrefix + storageRESTMethodCreateFile).HandlerFunc(httpTraceHdrs(server.CreateFileHandler)).
|
|
Queries(restQueries(storageRESTVolume, storageRESTFilePath, storageRESTLength)...)
|
|
|
|
subrouter.Methods(http.MethodPost).Path(storageRESTVersionPrefix + storageRESTMethodStatFile).HandlerFunc(httpTraceHdrs(server.StatFileHandler)).
|
|
Queries(restQueries(storageRESTVolume, storageRESTFilePath)...)
|
|
subrouter.Methods(http.MethodPost).Path(storageRESTVersionPrefix + storageRESTMethodReadAll).HandlerFunc(httpTraceHdrs(server.ReadAllHandler)).
|
|
Queries(restQueries(storageRESTVolume, storageRESTFilePath)...)
|
|
subrouter.Methods(http.MethodPost).Path(storageRESTVersionPrefix + storageRESTMethodReadFile).HandlerFunc(httpTraceHdrs(server.ReadFileHandler)).
|
|
Queries(restQueries(storageRESTVolume, storageRESTFilePath, storageRESTOffset, storageRESTLength, storageRESTBitrotAlgo, storageRESTBitrotHash)...)
|
|
subrouter.Methods(http.MethodPost).Path(storageRESTVersionPrefix + storageRESTMethodReadFileStream).HandlerFunc(httpTraceHdrs(server.ReadFileStreamHandler)).
|
|
Queries(restQueries(storageRESTVolume, storageRESTFilePath, storageRESTOffset, storageRESTLength)...)
|
|
subrouter.Methods(http.MethodPost).Path(storageRESTVersionPrefix + storageRESTMethodListDir).HandlerFunc(httpTraceHdrs(server.ListDirHandler)).
|
|
Queries(restQueries(storageRESTVolume, storageRESTDirPath, storageRESTCount, storageRESTLeafFile)...)
|
|
subrouter.Methods(http.MethodPost).Path(storageRESTVersionPrefix + storageRESTMethodWalk).HandlerFunc(httpTraceHdrs(server.WalkHandler)).
|
|
Queries(restQueries(storageRESTVolume, storageRESTDirPath, storageRESTMarkerPath, storageRESTRecursive, storageRESTLeafFile)...)
|
|
subrouter.Methods(http.MethodPost).Path(storageRESTVersionPrefix + storageRESTMethodDeleteFile).HandlerFunc(httpTraceHdrs(server.DeleteFileHandler)).
|
|
Queries(restQueries(storageRESTVolume, storageRESTFilePath)...)
|
|
subrouter.Methods(http.MethodPost).Path(storageRESTVersionPrefix + storageRESTMethodDeleteFileBulk).HandlerFunc(httpTraceHdrs(server.DeleteFileBulkHandler)).
|
|
Queries(restQueries(storageRESTVolume, storageRESTFilePath)...)
|
|
|
|
subrouter.Methods(http.MethodPost).Path(storageRESTVersionPrefix + storageRESTMethodRenameFile).HandlerFunc(httpTraceHdrs(server.RenameFileHandler)).
|
|
Queries(restQueries(storageRESTSrcVolume, storageRESTSrcPath, storageRESTDstVolume, storageRESTDstPath)...)
|
|
subrouter.Methods(http.MethodPost).Path(storageRESTVersionPrefix + storageRESTMethodVerifyFile).HandlerFunc(httpTraceHdrs(server.VerifyFile)).
|
|
Queries(restQueries(storageRESTVolume, storageRESTFilePath, storageRESTBitrotAlgo, storageRESTBitrotHash, storageRESTLength, storageRESTShardSize)...)
|
|
}
|
|
|
|
// If none of the routes match add default error handler routes
|
|
router.NotFoundHandler = http.HandlerFunc(httpTraceAll(errorResponseHandler))
|
|
router.MethodNotAllowedHandler = http.HandlerFunc(httpTraceAll(errorResponseHandler))
|
|
}
|