refactoring to separate master and volume server, so that these servers

can be embedded into other applications

8 files changed, 741 insertions, 531 deletions

diff --git a/go/weed/master.go b/go/weed/master.go
index 6255f85f5..a7b86ec8a 100644
--- a/go/weed/master.go
+++ b/go/weed/master.go
@@ -1,23 +1,14 @@
 package main
 
 import (
-	"bytes"
 	"code.google.com/p/weed-fs/go/glog"
-	"code.google.com/p/weed-fs/go/operation"
-	"code.google.com/p/weed-fs/go/replication"
-	"code.google.com/p/weed-fs/go/sequence"
-	"code.google.com/p/weed-fs/go/storage"
-	"code.google.com/p/weed-fs/go/topology"
-	"encoding/json"
-	"errors"
+	"code.google.com/p/weed-fs/go/weed/weed_server"
 	"github.com/gorilla/mux"
 	"net/http"
 	"os"
-	"path"
 	"runtime"
 	"strconv"
 	"strings"
-	"sync"
 	"time"
 )
 
@@ -51,168 +42,6 @@ var (
 	masterWhiteList []string
 )
 
-var topo *topology.Topology
-var vg *replication.VolumeGrowth
-var vgLock sync.Mutex
-
-func dirLookupHandler(w http.ResponseWriter, r *http.Request) {
-	vid := r.FormValue("volumeId")
-	collection := r.FormValue("collection") //optional, but can be faster if too many collections
-	commaSep := strings.Index(vid, ",")
-	if commaSep > 0 {
-		vid = vid[0:commaSep]
-	}
-	volumeId, err := storage.NewVolumeId(vid)
-	if err == nil {
-		machines := topo.Lookup(collection, volumeId)
-		if machines != nil {
-			ret := []map[string]string{}
-			for _, dn := range machines {
-				ret = append(ret, map[string]string{"url": dn.Url(), "publicUrl": dn.PublicUrl})
-			}
-			writeJsonQuiet(w, r, map[string]interface{}{"locations": ret})
-		} else {
-			w.WriteHeader(http.StatusNotFound)
-			writeJsonQuiet(w, r, map[string]string{"error": "volume id " + volumeId.String() + " not found. "})
-		}
-	} else {
-		w.WriteHeader(http.StatusNotAcceptable)
-		writeJsonQuiet(w, r, map[string]string{"error": "unknown volumeId format " + vid})
-	}
-}
-
-func dirAssignHandler(w http.ResponseWriter, r *http.Request) {
-	c, e := strconv.Atoi(r.FormValue("count"))
-	if e != nil {
-		c = 1
-	}
-	repType := r.FormValue("replication")
-	if repType == "" {
-		repType = *defaultRepType
-	}
-	collection := r.FormValue("collection")
-	dataCenter := r.FormValue("dataCenter")
-	rt, err := storage.NewReplicationTypeFromString(repType)
-	if err != nil {
-		w.WriteHeader(http.StatusNotAcceptable)
-		writeJsonQuiet(w, r, map[string]string{"error": err.Error()})
-		return
-	}
-
-	if topo.GetVolumeLayout(collection, rt).GetActiveVolumeCount(dataCenter) <= 0 {
-		if topo.FreeSpace() <= 0 {
-			w.WriteHeader(http.StatusNotFound)
-			writeJsonQuiet(w, r, map[string]string{"error": "No free volumes left!"})
-			return
-		} else {
-			vgLock.Lock()
-			defer vgLock.Unlock()
-			if topo.GetVolumeLayout(collection, rt).GetActiveVolumeCount(dataCenter) <= 0 {
-				if _, err = vg.AutomaticGrowByType(collection, rt, dataCenter, topo); err != nil {
-					writeJsonQuiet(w, r, map[string]string{"error": "Cannot grow volume group! " + err.Error()})
-					return
-				}
-			}
-		}
-	}
-	fid, count, dn, err := topo.PickForWrite(collection, rt, c, dataCenter)
-	if err == nil {
-		writeJsonQuiet(w, r, map[string]interface{}{"fid": fid, "url": dn.Url(), "publicUrl": dn.PublicUrl, "count": count})
-	} else {
-		w.WriteHeader(http.StatusNotAcceptable)
-		writeJsonQuiet(w, r, map[string]string{"error": err.Error()})
-	}
-}
-
-func dirJoinHandler(w http.ResponseWriter, r *http.Request) {
-	init := r.FormValue("init") == "true"
-	ip := r.FormValue("ip")
-	if ip == "" {
-		ip = r.RemoteAddr[0:strings.Index(r.RemoteAddr, ":")]
-	}
-	port, _ := strconv.Atoi(r.FormValue("port"))
-	maxVolumeCount, _ := strconv.Atoi(r.FormValue("maxVolumeCount"))
-	s := r.RemoteAddr[0:strings.Index(r.RemoteAddr, ":")+1] + r.FormValue("port")
-	publicUrl := r.FormValue("publicUrl")
-	volumes := new([]storage.VolumeInfo)
-	if err := json.Unmarshal([]byte(r.FormValue("volumes")), volumes); err != nil {
-		writeJsonQuiet(w, r, map[string]string{"error": "Cannot unmarshal \"volumes\": " + err.Error()})
-		return
-	}
-	debug(s, "volumes", r.FormValue("volumes"))
-	topo.RegisterVolumes(init, *volumes, ip, port, publicUrl, maxVolumeCount, r.FormValue("dataCenter"), r.FormValue("rack"))
-	m := make(map[string]interface{})
-	m["VolumeSizeLimit"] = uint64(*volumeSizeLimitMB) * 1024 * 1024
-	writeJsonQuiet(w, r, m)
-}
-
-func dirStatusHandler(w http.ResponseWriter, r *http.Request) {
-	m := make(map[string]interface{})
-	m["Version"] = VERSION
-	m["Topology"] = topo.ToMap()
-	writeJsonQuiet(w, r, m)
-}
-
-func volumeVacuumHandler(w http.ResponseWriter, r *http.Request) {
-	gcThreshold := r.FormValue("garbageThreshold")
-	if gcThreshold == "" {
-		gcThreshold = *garbageThreshold
-	}
-	debug("garbageThreshold =", gcThreshold)
-	topo.Vacuum(gcThreshold)
-	dirStatusHandler(w, r)
-}
-
-func volumeGrowHandler(w http.ResponseWriter, r *http.Request) {
-	count := 0
-	rt, err := storage.NewReplicationTypeFromString(r.FormValue("replication"))
-	if err == nil {
-		if count, err = strconv.Atoi(r.FormValue("count")); err == nil {
-			if topo.FreeSpace() < count*rt.GetCopyCount() {
-				err = errors.New("Only " + strconv.Itoa(topo.FreeSpace()) + " volumes left! Not enough for " + strconv.Itoa(count*rt.GetCopyCount()))
-			} else {
-				count, err = vg.GrowByCountAndType(count, r.FormValue("collection"), rt, r.FormValue("dataCneter"), topo)
-			}
-		} else {
-			err = errors.New("parameter count is not found")
-		}
-	}
-	if err != nil {
-		w.WriteHeader(http.StatusNotAcceptable)
-		writeJsonQuiet(w, r, map[string]string{"error": "parameter replication " + err.Error()})
-	} else {
-		w.WriteHeader(http.StatusNotAcceptable)
-		writeJsonQuiet(w, r, map[string]interface{}{"count": count})
-	}
-}
-
-func volumeStatusHandler(w http.ResponseWriter, r *http.Request) {
-	m := make(map[string]interface{})
-	m["Version"] = VERSION
-	m["Volumes"] = topo.ToVolumeMap()
-	writeJsonQuiet(w, r, m)
-}
-
-func redirectHandler(w http.ResponseWriter, r *http.Request) {
-	vid, _, _, _, _ := parseURLPath(r.URL.Path)
-	volumeId, err := storage.NewVolumeId(vid)
-	if err != nil {
-		debug("parsing error:", err, r.URL.Path)
-		return
-	}
-	machines := topo.Lookup("", volumeId)
-	if machines != nil && len(machines) > 0 {
-		http.Redirect(w, r, "http://"+machines[0].PublicUrl+r.URL.Path, http.StatusMovedPermanently)
-	} else {
-		w.WriteHeader(http.StatusNotFound)
-		writeJsonQuiet(w, r, map[string]string{"error": "volume id " + volumeId.String() + " not found. "})
-	}
-}
-
-func submitFromMasterServerHandler(w http.ResponseWriter, r *http.Request) {
-	submitForClientHandler(w, r, "localhost:"+strconv.Itoa(*mport))
-}
-
 func runMaster(cmd *Command, args []string) bool {
 	if *mMaxCpu < 1 {
 		*mMaxCpu = runtime.NumCPU()
@@ -221,32 +50,11 @@ func runMaster(cmd *Command, args []string) bool {
 	if *masterWhiteListOption != "" {
 		masterWhiteList = strings.Split(*masterWhiteListOption, ",")
 	}
-	var seq sequence.Sequencer
-	//if len(*etcdCluster) == 0 {
-	seq = sequence.NewFileSequencer(path.Join(*metaFolder, "weed.seq"))
-	//} else {
-	//	seq = sequence.NewEtcdSequencer(*etcdCluster)
-	//}
-	var e error
-	if topo, e = topology.NewTopology("topo", *confFile, seq,
-		uint64(*volumeSizeLimitMB)*1024*1024, *mpulse); e != nil {
-		glog.Fatalf("cannot create topology:%s", e)
-	}
-	vg = replication.NewDefaultVolumeGrowth()
-	glog.V(0).Infoln("Volume Size Limit is", *volumeSizeLimitMB, "MB")
 
 	r := mux.NewRouter()
-	r.HandleFunc("/dir/assign", secure(masterWhiteList, dirAssignHandler))
-	r.HandleFunc("/dir/lookup", secure(masterWhiteList, dirLookupHandler))
-	r.HandleFunc("/dir/join", secure(masterWhiteList, dirJoinHandler))
-	r.HandleFunc("/dir/status", secure(masterWhiteList, dirStatusHandler))
-	r.HandleFunc("/vol/grow", secure(masterWhiteList, volumeGrowHandler))
-	r.HandleFunc("/vol/status", secure(masterWhiteList, volumeStatusHandler))
-	r.HandleFunc("/vol/vacuum", secure(masterWhiteList, volumeVacuumHandler))
-	r.HandleFunc("/submit", secure(masterWhiteList, submitFromMasterServerHandler))
-	r.HandleFunc("/", redirectHandler)
-
-	topo.StartRefreshWritableVolumes(*garbageThreshold)
+	weed_server.NewMasterServer(r, VERSION, *mport, *metaFolder,
+		*volumeSizeLimitMB, *mpulse, *confFile, *defaultRepType, *garbageThreshold, masterWhiteList,
+	)
 
 	glog.V(0).Infoln("Start Weed Master", VERSION, "at port", strconv.Itoa(*mport))
 	srv := &http.Server{
@@ -254,51 +62,9 @@ func runMaster(cmd *Command, args []string) bool {
 		Handler:     r,
 		ReadTimeout: time.Duration(*mReadTimeout) * time.Second,
 	}
-	e = srv.ListenAndServe()
+	e := srv.ListenAndServe()
 	if e != nil {
 		glog.Fatalf("Fail to start:%s", e)
 	}
 	return true
 }
-
-func submitForClientHandler(w http.ResponseWriter, r *http.Request, masterUrl string) {
-	m := make(map[string]interface{})
-	if r.Method != "POST" {
-		m["error"] = "Only submit via POST!"
-		writeJsonQuiet(w, r, m)
-		return
-	}
-
-	debug("parsing upload file...")
-	fname, data, mimeType, isGzipped, lastModified, pe := storage.ParseUpload(r)
-	if pe != nil {
-		writeJsonError(w, r, pe)
-		return
-	}
-
-	debug("assigning file id for", fname)
-	assignResult, ae := operation.Assign(masterUrl, 1, r.FormValue("replication"))
-	if ae != nil {
-		writeJsonError(w, r, ae)
-		return
-	}
-
-	url := "http://" + assignResult.PublicUrl + "/" + assignResult.Fid
-	if lastModified != 0 {
-		url = url + "?ts=" + strconv.FormatUint(lastModified, 10)
-	}
-
-	debug("upload file to store", url)
-	uploadResult, err := operation.Upload(url, fname, bytes.NewReader(data), isGzipped, mimeType)
-	if err != nil {
-		writeJsonError(w, r, err)
-		return
-	}
-
-	m["fileName"] = fname
-	m["fid"] = assignResult.Fid
-	m["fileUrl"] = assignResult.PublicUrl + "/" + assignResult.Fid
-	m["size"] = uploadResult.Size
-	writeJsonQuiet(w, r, m)
-	return
-}
diff --git a/go/weed/volume.go b/go/weed/volume.go
index f3a6038c2..50864c541 100644
--- a/go/weed/volume.go
+++ b/go/weed/volume.go
@@ -2,15 +2,10 @@ package main
 
 import (
 	"code.google.com/p/weed-fs/go/glog"
-	"code.google.com/p/weed-fs/go/operation"
-	"code.google.com/p/weed-fs/go/replication"
-	"code.google.com/p/weed-fs/go/storage"
+	"code.google.com/p/weed-fs/go/weed/weed_server"
 	"github.com/gorilla/mux"
-	"math/rand"
-	"mime"
 	"net/http"
 	"os"
-	"path/filepath"
 	"runtime"
 	"strconv"
 	"strings"
@@ -44,264 +39,9 @@ var (
 	rack                  = cmdVolume.Flag.String("rack", "", "current volume server's rack name")
 	volumeWhiteListOption = cmdVolume.Flag.String("whiteList", "", "comma separated Ip addresses having write permission. No limit if empty.")
 
-	store           *storage.Store
 	volumeWhiteList []string
 )
 
-var fileNameEscaper = strings.NewReplacer("\\", "\\\\", "\"", "\\\"")
-
-func statusHandler(w http.ResponseWriter, r *http.Request) {
-	m := make(map[string]interface{})
-	m["Version"] = VERSION
-	m["Volumes"] = store.Status()
-	writeJsonQuiet(w, r, m)
-}
-func assignVolumeHandler(w http.ResponseWriter, r *http.Request) {
-	err := store.AddVolume(r.FormValue("volume"), r.FormValue("collection"), r.FormValue("replicationType"))
-	if err == nil {
-		writeJsonQuiet(w, r, map[string]string{"error": ""})
-	} else {
-		writeJsonQuiet(w, r, map[string]string{"error": err.Error()})
-	}
-	debug("assign volume =", r.FormValue("volume"), ", collection =", r.FormValue("collection"), ", replicationType =", r.FormValue("replicationType"), ", error =", err)
-}
-func vacuumVolumeCheckHandler(w http.ResponseWriter, r *http.Request) {
-	err, ret := store.CheckCompactVolume(r.FormValue("volume"), r.FormValue("garbageThreshold"))
-	if err == nil {
-		writeJsonQuiet(w, r, map[string]interface{}{"error": "", "result": ret})
-	} else {
-		writeJsonQuiet(w, r, map[string]interface{}{"error": err.Error(), "result": false})
-	}
-	debug("checked compacting volume =", r.FormValue("volume"), "garbageThreshold =", r.FormValue("garbageThreshold"), "vacuum =", ret)
-}
-func vacuumVolumeCompactHandler(w http.ResponseWriter, r *http.Request) {
-	err := store.CompactVolume(r.FormValue("volume"))
-	if err == nil {
-		writeJsonQuiet(w, r, map[string]string{"error": ""})
-	} else {
-		writeJsonQuiet(w, r, map[string]string{"error": err.Error()})
-	}
-	debug("compacted volume =", r.FormValue("volume"), ", error =", err)
-}
-func vacuumVolumeCommitHandler(w http.ResponseWriter, r *http.Request) {
-	err := store.CommitCompactVolume(r.FormValue("volume"))
-	if err == nil {
-		writeJsonQuiet(w, r, map[string]interface{}{"error": ""})
-	} else {
-		writeJsonQuiet(w, r, map[string]string{"error": err.Error()})
-	}
-	debug("commit compact volume =", r.FormValue("volume"), ", error =", err)
-}
-func freezeVolumeHandler(w http.ResponseWriter, r *http.Request) {
-	//TODO: notify master that this volume will be read-only
-	err := store.FreezeVolume(r.FormValue("volume"))
-	if err == nil {
-		writeJsonQuiet(w, r, map[string]interface{}{"error": ""})
-	} else {
-		writeJsonQuiet(w, r, map[string]string{"error": err.Error()})
-	}
-	debug("freeze volume =", r.FormValue("volume"), ", error =", err)
-}
-func submitFromVolumeServerHandler(w http.ResponseWriter, r *http.Request) {
-	submitForClientHandler(w, r, *masterNode)
-}
-func storeHandler(w http.ResponseWriter, r *http.Request) {
-	switch r.Method {
-	case "GET":
-		GetOrHeadHandler(w, r, true)
-	case "HEAD":
-		GetOrHeadHandler(w, r, false)
-	case "DELETE":
-		secure(volumeWhiteList, DeleteHandler)(w, r)
-	case "PUT":
-		secure(volumeWhiteList, PostHandler)(w, r)
-	case "POST":
-		secure(volumeWhiteList, PostHandler)(w, r)
-	}
-}
-func GetOrHeadHandler(w http.ResponseWriter, r *http.Request, isGetMethod bool) {
-	n := new(storage.Needle)
-	vid, fid, filename, ext, _ := parseURLPath(r.URL.Path)
-	volumeId, err := storage.NewVolumeId(vid)
-	if err != nil {
-		debug("parsing error:", err, r.URL.Path)
-		return
-	}
-	n.ParsePath(fid)
-
-	debug("volume", volumeId, "reading", n)
-	if !store.HasVolume(volumeId) {
-		lookupResult, err := operation.Lookup(*masterNode, volumeId)
-		debug("volume", volumeId, "found on", lookupResult, "error", err)
-		if err == nil {
-			http.Redirect(w, r, "http://"+lookupResult.Locations[0].PublicUrl+r.URL.Path, http.StatusMovedPermanently)
-		} else {
-			debug("lookup error:", err, r.URL.Path)
-			w.WriteHeader(http.StatusNotFound)
-		}
-		return
-	}
-	cookie := n.Cookie
-	count, e := store.Read(volumeId, n)
-	debug("read bytes", count, "error", e)
-	if e != nil || count <= 0 {
-		debug("read error:", e, r.URL.Path)
-		w.WriteHeader(http.StatusNotFound)
-		return
-	}
-	if n.Cookie != cookie {
-		glog.V(0).Infoln("request with unmaching cookie from ", r.RemoteAddr, "agent", r.UserAgent())
-		w.WriteHeader(http.StatusNotFound)
-		return
-	}
-	if n.LastModified != 0 {
-		w.Header().Set("Last-Modified", time.Unix(int64(n.LastModified), 0).UTC().Format(http.TimeFormat))
-		if r.Header.Get("If-Modified-Since") != "" {
-			if t, parseError := time.Parse(http.TimeFormat, r.Header.Get("If-Modified-Since")); parseError == nil {
-				if t.Unix() >= int64(n.LastModified) {
-					w.WriteHeader(http.StatusNotModified)
-					return
-				}
-			}
-		}
-	}
-	if n.NameSize > 0 && filename == "" {
-		filename = string(n.Name)
-		dotIndex := strings.LastIndex(filename, ".")
-		if dotIndex > 0 {
-			ext = filename[dotIndex:]
-		}
-	}
-	mtype := ""
-	if ext != "" {
-		mtype = mime.TypeByExtension(ext)
-	}
-	if n.MimeSize > 0 {
-		mtype = string(n.Mime)
-	}
-	if mtype != "" {
-		w.Header().Set("Content-Type", mtype)
-	}
-	if filename != "" {
-		w.Header().Set("Content-Disposition", "filename="+fileNameEscaper.Replace(filename))
-	}
-	if ext != ".gz" {
-		if n.IsGzipped() {
-			if strings.Contains(r.Header.Get("Accept-Encoding"), "gzip") {
-				w.Header().Set("Content-Encoding", "gzip")
-			} else {
-				if n.Data, err = storage.UnGzipData(n.Data); err != nil {
-					debug("lookup error:", err, r.URL.Path)
-				}
-			}
-		}
-	}
-	w.Header().Set("Content-Length", strconv.Itoa(len(n.Data)))
-	if isGetMethod {
-		if _, e = w.Write(n.Data); e != nil {
-			debug("response write error:", e)
-		}
-	}
-}
-func PostHandler(w http.ResponseWriter, r *http.Request) {
-	m := make(map[string]interface{})
-	if e := r.ParseForm(); e != nil {
-		debug("form parse error:", e)
-		writeJsonError(w, r, e)
-		return
-	}
-	vid, _, _, _, _ := parseURLPath(r.URL.Path)
-	volumeId, ve := storage.NewVolumeId(vid)
-	if ve != nil {
-		debug("NewVolumeId error:", ve)
-		writeJsonError(w, r, ve)
-		return
-	}
-	needle, ne := storage.NewNeedle(r)
-	if ne != nil {
-		writeJsonError(w, r, ne)
-		return
-	}
-	ret, errorStatus := replication.ReplicatedWrite(*masterNode, store, volumeId, needle, r)
-	if errorStatus == "" {
-		w.WriteHeader(http.StatusCreated)
-	} else {
-		w.WriteHeader(http.StatusInternalServerError)
-		m["error"] = errorStatus
-	}
-	m["size"] = ret
-	writeJsonQuiet(w, r, m)
-}
-func DeleteHandler(w http.ResponseWriter, r *http.Request) {
-	n := new(storage.Needle)
-	vid, fid, _, _, _ := parseURLPath(r.URL.Path)
-	volumeId, _ := storage.NewVolumeId(vid)
-	n.ParsePath(fid)
-
-	debug("deleting", n)
-
-	cookie := n.Cookie
-	count, ok := store.Read(volumeId, n)
-
-	if ok != nil {
-		m := make(map[string]uint32)
-		m["size"] = 0
-		writeJsonQuiet(w, r, m)
-		return
-	}
-
-	if n.Cookie != cookie {
-		glog.V(0).Infoln("delete with unmaching cookie from ", r.RemoteAddr, "agent", r.UserAgent())
-		return
-	}
-
-	n.Size = 0
-	ret := replication.ReplicatedDelete(*masterNode, store, volumeId, n, r)
-
-	if ret != 0 {
-		w.WriteHeader(http.StatusAccepted)
-	} else {
-		w.WriteHeader(http.StatusInternalServerError)
-	}
-
-	m := make(map[string]uint32)
-	m["size"] = uint32(count)
-	writeJsonQuiet(w, r, m)
-}
-
-func parseURLPath(path string) (vid, fid, filename, ext string, isVolumeIdOnly bool) {
-	switch strings.Count(path, "/") {
-	case 3:
-		parts := strings.Split(path, "/")
-		vid, fid, filename = parts[1], parts[2], parts[3]
-		ext = filepath.Ext(filename)
-	case 2:
-		parts := strings.Split(path, "/")
-		vid, fid = parts[1], parts[2]
-		dotIndex := strings.LastIndex(fid, ".")
-		if dotIndex > 0 {
-			ext = fid[dotIndex:]
-			fid = fid[0:dotIndex]
-		}
-	default:
-		sepIndex := strings.LastIndex(path, "/")
-		commaIndex := strings.LastIndex(path[sepIndex:], ",")
-		if commaIndex <= 0 {
-			vid, isVolumeIdOnly = path[sepIndex+1:], true
-			return
-		}
-		dotIndex := strings.LastIndex(path[sepIndex:], ".")
-		vid = path[sepIndex+1 : commaIndex]
-		fid = path[commaIndex+1:]
-		ext = ""
-		if dotIndex > 0 {
-			fid = path[commaIndex+1 : dotIndex]
-			ext = path[dotIndex:]
-		}
-	}
-	return
-}
-
 func runVolume(cmd *Command, args []string) bool {
 	if *vMaxCpu < 1 {
 		*vMaxCpu = runtime.NumCPU()
@@ -340,39 +80,11 @@ func runVolume(cmd *Command, args []string) bool {
 		volumeWhiteList = strings.Split(*volumeWhiteListOption, ",")
 	}
 
-	store = storage.NewStore(*vport, *ip, *publicUrl, folders, maxCounts)
-	defer store.Close()
 	r := mux.NewRouter()
-	r.HandleFunc("/submit", secure(volumeWhiteList, submitFromVolumeServerHandler))
-	r.HandleFunc("/status", secure(volumeWhiteList, statusHandler))
-	r.HandleFunc("/admin/assign_volume", secure(volumeWhiteList, assignVolumeHandler))
-	r.HandleFunc("/admin/vacuum_volume_check", secure(volumeWhiteList, vacuumVolumeCheckHandler))
-	r.HandleFunc("/admin/vacuum_volume_compact", secure(volumeWhiteList, vacuumVolumeCompactHandler))
-	r.HandleFunc("/admin/vacuum_volume_commit", secure(volumeWhiteList, vacuumVolumeCommitHandler))
-	r.HandleFunc("/admin/freeze_volume", secure(volumeWhiteList, freezeVolumeHandler))
-	r.HandleFunc("/", storeHandler)
 
-	go func() {
-		connected := true
-		store.SetMaster(*masterNode)
-		store.SetDataCenter(*dataCenter)
-		store.SetRack(*rack)
-		for {
-			err := store.Join()
-			if err == nil {
-				if !connected {
-					connected = true
-					glog.V(0).Infoln("Reconnected with master")
-				}
-			} else {
-				if connected {
-					connected = false
-				}
-			}
-			time.Sleep(time.Duration(float32(*vpulse*1e3)*(1+rand.Float32())) * time.Millisecond)
-		}
-	}()
-	glog.V(0).Infoln("store joined at", *masterNode)
+	weed_server.NewVolumeServer(r, VERSION, *ip, *vport, *publicUrl, folders, maxCounts,
+		*masterNode, *vpulse, *dataCenter, *rack, volumeWhiteList,
+	)
 
 	glog.V(0).Infoln("Start Weed volume server", VERSION, "at http://"+*ip+":"+strconv.Itoa(*vport))
 	srv := &http.Server{
diff --git a/go/weed/weed.go b/go/weed/weed.go
index 3d4beac88..26a009b4b 100644
--- a/go/weed/weed.go
+++ b/go/weed/weed.go
@@ -10,6 +10,7 @@ import (
 	"net"
 	"net/http"
 	"os"
+	"path/filepath"
 	"strings"
 	"sync"
 	"text/template"
@@ -244,3 +245,36 @@ func secure(whiteList []string, f func(w http.ResponseWriter, r *http.Request))
 		writeJsonQuiet(w, r, map[string]interface{}{"error": "No write permisson from " + host})
 	}
 }
+
+func parseURLPath(path string) (vid, fid, filename, ext string, isVolumeIdOnly bool) {
+	switch strings.Count(path, "/") {
+	case 3:
+		parts := strings.Split(path, "/")
+		vid, fid, filename = parts[1], parts[2], parts[3]
+		ext = filepath.Ext(filename)
+	case 2:
+		parts := strings.Split(path, "/")
+		vid, fid = parts[1], parts[2]
+		dotIndex := strings.LastIndex(fid, ".")
+		if dotIndex > 0 {
+			ext = fid[dotIndex:]
+			fid = fid[0:dotIndex]
+		}
+	default:
+		sepIndex := strings.LastIndex(path, "/")
+		commaIndex := strings.LastIndex(path[sepIndex:], ",")
+		if commaIndex <= 0 {
+			vid, isVolumeIdOnly = path[sepIndex+1:], true
+			return
+		}
+		dotIndex := strings.LastIndex(path[sepIndex:], ".")
+		vid = path[sepIndex+1 : commaIndex]
+		fid = path[commaIndex+1:]
+		ext = ""
+		if dotIndex > 0 {
+			fid = path[commaIndex+1 : dotIndex]
+			ext = path[dotIndex:]
+		}
+	}
+	return
+}
diff --git a/go/weed/weed_server/common.go b/go/weed/weed_server/common.go
new file mode 100644
index 000000000..929bf592d
--- /dev/null
+++ b/go/weed/weed_server/common.go
@@ -0,0 +1,158 @@
+package weed_server
+
+import (
+	"bytes"
+	"code.google.com/p/weed-fs/go/glog"
+	"code.google.com/p/weed-fs/go/operation"
+	"code.google.com/p/weed-fs/go/storage"
+	"encoding/json"
+	"fmt"
+	"net"
+	"net/http"
+	"path/filepath"
+	"strconv"
+	"strings"
+)
+
+var IsDebug *bool
+
+func writeJson(w http.ResponseWriter, r *http.Request, obj interface{}) (err error) {
+	w.Header().Set("Content-Type", "application/javascript")
+	var bytes []byte
+	if r.FormValue("pretty") != "" {
+		bytes, err = json.MarshalIndent(obj, "", "  ")
+	} else {
+		bytes, err = json.Marshal(obj)
+	}
+	if err != nil {
+		return
+	}
+	callback := r.FormValue("callback")
+	if callback == "" {
+		_, err = w.Write(bytes)
+	} else {
+		if _, err = w.Write([]uint8(callback)); err != nil {
+			return
+		}
+		if _, err = w.Write([]uint8("(")); err != nil {
+			return
+		}
+		fmt.Fprint(w, string(bytes))
+		if _, err = w.Write([]uint8(")")); err != nil {
+			return
+		}
+	}
+	return
+}
+
+// wrapper for writeJson - just logs errors
+func writeJsonQuiet(w http.ResponseWriter, r *http.Request, obj interface{}) {
+	if err := writeJson(w, r, obj); err != nil {
+		glog.V(0).Infof("error writing JSON %s: %s", obj, err.Error())
+	}
+}
+func writeJsonError(w http.ResponseWriter, r *http.Request, err error) {
+	m := make(map[string]interface{})
+	m["error"] = err.Error()
+	writeJsonQuiet(w, r, m)
+}
+
+func debug(params ...interface{}) {
+	if *IsDebug {
+		glog.V(0).Infoln(params)
+	}
+}
+
+func secure(whiteList []string, f func(w http.ResponseWriter, r *http.Request)) func(w http.ResponseWriter, r *http.Request) {
+	return func(w http.ResponseWriter, r *http.Request) {
+		if len(whiteList) == 0 {
+			f(w, r)
+			return
+		}
+		host, _, err := net.SplitHostPort(r.RemoteAddr)
+		if err == nil {
+			for _, ip := range whiteList {
+				if ip == host {
+					f(w, r)
+					return
+				}
+			}
+		}
+		writeJsonQuiet(w, r, map[string]interface{}{"error": "No write permisson from " + host})
+	}
+}
+
+func submitForClientHandler(w http.ResponseWriter, r *http.Request, masterUrl string) {
+	m := make(map[string]interface{})
+	if r.Method != "POST" {
+		m["error"] = "Only submit via POST!"
+		writeJsonQuiet(w, r, m)
+		return
+	}
+
+	debug("parsing upload file...")
+	fname, data, mimeType, isGzipped, lastModified, pe := storage.ParseUpload(r)
+	if pe != nil {
+		writeJsonError(w, r, pe)
+		return
+	}
+
+	debug("assigning file id for", fname)
+	assignResult, ae := operation.Assign(masterUrl, 1, r.FormValue("replication"))
+	if ae != nil {
+		writeJsonError(w, r, ae)
+		return
+	}
+
+	url := "http://" + assignResult.PublicUrl + "/" + assignResult.Fid
+	if lastModified != 0 {
+		url = url + "?ts=" + strconv.FormatUint(lastModified, 10)
+	}
+
+	debug("upload file to store", url)
+	uploadResult, err := operation.Upload(url, fname, bytes.NewReader(data), isGzipped, mimeType)
+	if err != nil {
+		writeJsonError(w, r, err)
+		return
+	}
+
+	m["fileName"] = fname
+	m["fid"] = assignResult.Fid
+	m["fileUrl"] = assignResult.PublicUrl + "/" + assignResult.Fid
+	m["size"] = uploadResult.Size
+	writeJsonQuiet(w, r, m)
+	return
+}
+
+func parseURLPath(path string) (vid, fid, filename, ext string, isVolumeIdOnly bool) {
+	switch strings.Count(path, "/") {
+	case 3:
+		parts := strings.Split(path, "/")
+		vid, fid, filename = parts[1], parts[2], parts[3]
+		ext = filepath.Ext(filename)
+	case 2:
+		parts := strings.Split(path, "/")
+		vid, fid = parts[1], parts[2]
+		dotIndex := strings.LastIndex(fid, ".")
+		if dotIndex > 0 {
+			ext = fid[dotIndex:]
+			fid = fid[0:dotIndex]
+		}
+	default:
+		sepIndex := strings.LastIndex(path, "/")
+		commaIndex := strings.LastIndex(path[sepIndex:], ",")
+		if commaIndex <= 0 {
+			vid, isVolumeIdOnly = path[sepIndex+1:], true
+			return
+		}
+		dotIndex := strings.LastIndex(path[sepIndex:], ".")
+		vid = path[sepIndex+1 : commaIndex]
+		fid = path[commaIndex+1:]
+		ext = ""
+		if dotIndex > 0 {
+			fid = path[commaIndex+1 : dotIndex]
+			ext = path[dotIndex:]
+		}
+	}
+	return
+}
diff --git a/go/weed/weed_server/master_server.go b/go/weed/weed_server/master_server.go
new file mode 100644
index 000000000..ee1181f1d
--- /dev/null
+++ b/go/weed/weed_server/master_server.go
@@ -0,0 +1,69 @@
+package weed_server
+
+import (
+	"code.google.com/p/weed-fs/go/glog"
+	"code.google.com/p/weed-fs/go/replication"
+	"code.google.com/p/weed-fs/go/sequence"
+	"code.google.com/p/weed-fs/go/topology"
+	"github.com/gorilla/mux"
+	"path"
+	"sync"
+)
+
+type MasterServer struct {
+	port              int
+	metaFolder        string
+	volumeSizeLimitMB uint
+	pulseSeconds      int
+	defaultRepType    string
+	garbageThreshold  string
+	whiteList         []string
+	version           string
+
+	topo   *topology.Topology
+	vg     *replication.VolumeGrowth
+	vgLock sync.Mutex
+}
+
+func NewMasterServer(r *mux.Router, version string, port int, metaFolder string,
+	volumeSizeLimitMB uint,
+	pulseSeconds int,
+	confFile string,
+	defaultRepType string,
+	garbageThreshold string,
+	whiteList []string) *MasterServer {
+	ms := &MasterServer{
+		version:           version,
+		volumeSizeLimitMB: volumeSizeLimitMB,
+		pulseSeconds:      pulseSeconds,
+		defaultRepType:    defaultRepType,
+		garbageThreshold:  garbageThreshold,
+		whiteList:         whiteList,
+	}
+	//if len(*etcdCluster) == 0 {
+	seq := sequence.NewFileSequencer(path.Join(metaFolder, "weed.seq"))
+	//} else {
+	//	seq = sequence.NewEtcdSequencer(*etcdCluster)
+	//}
+	var e error
+	if ms.topo, e = topology.NewTopology("topo", confFile, seq,
+		uint64(volumeSizeLimitMB)*1024*1024, pulseSeconds); e != nil {
+		glog.Fatalf("cannot create topology:%s", e)
+	}
+	ms.vg = replication.NewDefaultVolumeGrowth()
+	glog.V(0).Infoln("Volume Size Limit is", volumeSizeLimitMB, "MB")
+
+	r.HandleFunc("/dir/assign", secure(ms.whiteList, ms.dirAssignHandler))
+	r.HandleFunc("/dir/lookup", secure(ms.whiteList, ms.dirLookupHandler))
+	r.HandleFunc("/dir/join", secure(ms.whiteList, ms.dirJoinHandler))
+	r.HandleFunc("/dir/status", secure(ms.whiteList, ms.dirStatusHandler))
+	r.HandleFunc("/vol/grow", secure(ms.whiteList, ms.volumeGrowHandler))
+	r.HandleFunc("/vol/status", secure(ms.whiteList, ms.volumeStatusHandler))
+	r.HandleFunc("/vol/vacuum", secure(ms.whiteList, ms.volumeVacuumHandler))
+	r.HandleFunc("/submit", secure(ms.whiteList, ms.submitFromMasterServerHandler))
+	r.HandleFunc("/", ms.redirectHandler)
+
+	ms.topo.StartRefreshWritableVolumes(garbageThreshold)
+
+	return ms
+}
diff --git a/go/weed/weed_server/master_server_handlers.go b/go/weed/weed_server/master_server_handlers.go
new file mode 100644
index 000000000..fda341f02
--- /dev/null
+++ b/go/weed/weed_server/master_server_handlers.go
@@ -0,0 +1,168 @@
+package weed_server
+
+import (
+	"code.google.com/p/weed-fs/go/storage"
+	"encoding/json"
+	"errors"
+	"net/http"
+	"strconv"
+	"strings"
+)
+
+func (ms *MasterServer) dirLookupHandler(w http.ResponseWriter, r *http.Request) {
+	vid := r.FormValue("volumeId")
+	collection := r.FormValue("collection") //optional, but can be faster if too many collections
+	commaSep := strings.Index(vid, ",")
+	if commaSep > 0 {
+		vid = vid[0:commaSep]
+	}
+	volumeId, err := storage.NewVolumeId(vid)
+	if err == nil {
+		machines := ms.topo.Lookup(collection, volumeId)
+		if machines != nil {
+			ret := []map[string]string{}
+			for _, dn := range machines {
+				ret = append(ret, map[string]string{"url": dn.Url(), "publicUrl": dn.PublicUrl})
+			}
+			writeJsonQuiet(w, r, map[string]interface{}{"locations": ret})
+		} else {
+			w.WriteHeader(http.StatusNotFound)
+			writeJsonQuiet(w, r, map[string]string{"error": "volume id " + volumeId.String() + " not found. "})
+		}
+	} else {
+		w.WriteHeader(http.StatusNotAcceptable)
+		writeJsonQuiet(w, r, map[string]string{"error": "unknown volumeId format " + vid})
+	}
+}
+
+func (ms *MasterServer) dirAssignHandler(w http.ResponseWriter, r *http.Request) {
+	c, e := strconv.Atoi(r.FormValue("count"))
+	if e != nil {
+		c = 1
+	}
+	repType := r.FormValue("replication")
+	if repType == "" {
+		repType = ms.defaultRepType
+	}
+	collection := r.FormValue("collection")
+	dataCenter := r.FormValue("dataCenter")
+	rt, err := storage.NewReplicationTypeFromString(repType)
+	if err != nil {
+		w.WriteHeader(http.StatusNotAcceptable)
+		writeJsonQuiet(w, r, map[string]string{"error": err.Error()})
+		return
+	}
+
+	if ms.topo.GetVolumeLayout(collection, rt).GetActiveVolumeCount(dataCenter) <= 0 {
+		if ms.topo.FreeSpace() <= 0 {
+			w.WriteHeader(http.StatusNotFound)
+			writeJsonQuiet(w, r, map[string]string{"error": "No free volumes left!"})
+			return
+		} else {
+			ms.vgLock.Lock()
+			defer ms.vgLock.Unlock()
+			if ms.topo.GetVolumeLayout(collection, rt).GetActiveVolumeCount(dataCenter) <= 0 {
+				if _, err = ms.vg.AutomaticGrowByType(collection, rt, dataCenter, ms.topo); err != nil {
+					writeJsonQuiet(w, r, map[string]string{"error": "Cannot grow volume group! " + err.Error()})
+					return
+				}
+			}
+		}
+	}
+	fid, count, dn, err := ms.topo.PickForWrite(collection, rt, c, dataCenter)
+	if err == nil {
+		writeJsonQuiet(w, r, map[string]interface{}{"fid": fid, "url": dn.Url(), "publicUrl": dn.PublicUrl, "count": count})
+	} else {
+		w.WriteHeader(http.StatusNotAcceptable)
+		writeJsonQuiet(w, r, map[string]string{"error": err.Error()})
+	}
+}
+
+func (ms *MasterServer) dirJoinHandler(w http.ResponseWriter, r *http.Request) {
+	init := r.FormValue("init") == "true"
+	ip := r.FormValue("ip")
+	if ip == "" {
+		ip = r.RemoteAddr[0:strings.Index(r.RemoteAddr, ":")]
+	}
+	port, _ := strconv.Atoi(r.FormValue("port"))
+	maxVolumeCount, _ := strconv.Atoi(r.FormValue("maxVolumeCount"))
+	s := r.RemoteAddr[0:strings.Index(r.RemoteAddr, ":")+1] + r.FormValue("port")
+	publicUrl := r.FormValue("publicUrl")
+	volumes := new([]storage.VolumeInfo)
+	if err := json.Unmarshal([]byte(r.FormValue("volumes")), volumes); err != nil {
+		writeJsonQuiet(w, r, map[string]string{"error": "Cannot unmarshal \"volumes\": " + err.Error()})
+		return
+	}
+	debug(s, "volumes", r.FormValue("volumes"))
+	ms.topo.RegisterVolumes(init, *volumes, ip, port, publicUrl, maxVolumeCount, r.FormValue("dataCenter"), r.FormValue("rack"))
+	m := make(map[string]interface{})
+	m["VolumeSizeLimit"] = uint64(ms.volumeSizeLimitMB) * 1024 * 1024
+	writeJsonQuiet(w, r, m)
+}
+
+func (ms *MasterServer) dirStatusHandler(w http.ResponseWriter, r *http.Request) {
+	m := make(map[string]interface{})
+	m["Version"] = ms.version
+	m["Topology"] = ms.topo.ToMap()
+	writeJsonQuiet(w, r, m)
+}
+
+func (ms *MasterServer) volumeVacuumHandler(w http.ResponseWriter, r *http.Request) {
+	gcThreshold := r.FormValue("garbageThreshold")
+	if gcThreshold == "" {
+		gcThreshold = ms.garbageThreshold
+	}
+	debug("garbageThreshold =", gcThreshold)
+	ms.topo.Vacuum(gcThreshold)
+	ms.dirStatusHandler(w, r)
+}
+
+func (ms *MasterServer) volumeGrowHandler(w http.ResponseWriter, r *http.Request) {
+	count := 0
+	rt, err := storage.NewReplicationTypeFromString(r.FormValue("replication"))
+	if err == nil {
+		if count, err = strconv.Atoi(r.FormValue("count")); err == nil {
+			if ms.topo.FreeSpace() < count*rt.GetCopyCount() {
+				err = errors.New("Only " + strconv.Itoa(ms.topo.FreeSpace()) + " volumes left! Not enough for " + strconv.Itoa(count*rt.GetCopyCount()))
+			} else {
+				count, err = ms.vg.GrowByCountAndType(count, r.FormValue("collection"), rt, r.FormValue("dataCneter"), ms.topo)
+			}
+		} else {
+			err = errors.New("parameter count is not found")
+		}
+	}
+	if err != nil {
+		w.WriteHeader(http.StatusNotAcceptable)
+		writeJsonQuiet(w, r, map[string]string{"error": "parameter replication " + err.Error()})
+	} else {
+		w.WriteHeader(http.StatusNotAcceptable)
+		writeJsonQuiet(w, r, map[string]interface{}{"count": count})
+	}
+}
+
+func (ms *MasterServer) volumeStatusHandler(w http.ResponseWriter, r *http.Request) {
+	m := make(map[string]interface{})
+	m["Version"] = ms.version
+	m["Volumes"] = ms.topo.ToVolumeMap()
+	writeJsonQuiet(w, r, m)
+}
+
+func (ms *MasterServer) redirectHandler(w http.ResponseWriter, r *http.Request) {
+	vid, _, _, _, _ := parseURLPath(r.URL.Path)
+	volumeId, err := storage.NewVolumeId(vid)
+	if err != nil {
+		debug("parsing error:", err, r.URL.Path)
+		return
+	}
+	machines := ms.topo.Lookup("", volumeId)
+	if machines != nil && len(machines) > 0 {
+		http.Redirect(w, r, "http://"+machines[0].PublicUrl+r.URL.Path, http.StatusMovedPermanently)
+	} else {
+		w.WriteHeader(http.StatusNotFound)
+		writeJsonQuiet(w, r, map[string]string{"error": "volume id " + volumeId.String() + " not found. "})
+	}
+}
+
+func (ms *MasterServer) submitFromMasterServerHandler(w http.ResponseWriter, r *http.Request) {
+	submitForClientHandler(w, r, "localhost:"+strconv.Itoa(ms.port))
+}
diff --git a/go/weed/weed_server/volume_server.go b/go/weed/weed_server/volume_server.go
new file mode 100644
index 000000000..e0624d85b
--- /dev/null
+++ b/go/weed/weed_server/volume_server.go
@@ -0,0 +1,67 @@
+package weed_server
+
+import (
+	"code.google.com/p/weed-fs/go/glog"
+	"code.google.com/p/weed-fs/go/storage"
+	"github.com/gorilla/mux"
+	"math/rand"
+	"time"
+)
+
+type VolumeServer struct {
+	masterNode   string
+	pulseSeconds int
+	dataCenter   string
+	rack         string
+	whiteList    []string
+	store        *storage.Store
+	version      string
+}
+
+func NewVolumeServer(r *mux.Router, version string, ip string, port int, publicUrl string, folders []string, maxCounts []int,
+	masterNode string, pulseSeconds int,
+	dataCenter string, rack string,
+	whiteList []string) *VolumeServer {
+	vs := &VolumeServer{
+		version:      version,
+		masterNode:   masterNode,
+		pulseSeconds: pulseSeconds,
+		dataCenter:   dataCenter,
+		rack:         rack,
+		whiteList:    whiteList,
+	}
+	vs.store = storage.NewStore(port, ip, publicUrl, folders, maxCounts)
+
+	r.HandleFunc("/submit", secure(vs.whiteList, vs.submitFromVolumeServerHandler))
+	r.HandleFunc("/status", secure(vs.whiteList, vs.statusHandler))
+	r.HandleFunc("/admin/assign_volume", secure(vs.whiteList, vs.assignVolumeHandler))
+	r.HandleFunc("/admin/vacuum_volume_check", secure(vs.whiteList, vs.vacuumVolumeCheckHandler))
+	r.HandleFunc("/admin/vacuum_volume_compact", secure(vs.whiteList, vs.vacuumVolumeCompactHandler))
+	r.HandleFunc("/admin/vacuum_volume_commit", secure(vs.whiteList, vs.vacuumVolumeCommitHandler))
+	r.HandleFunc("/admin/freeze_volume", secure(vs.whiteList, vs.freezeVolumeHandler))
+	r.HandleFunc("/", vs.storeHandler)
+
+	go func() {
+		connected := true
+		vs.store.SetMaster(vs.masterNode)
+		vs.store.SetDataCenter(vs.dataCenter)
+		vs.store.SetRack(vs.rack)
+		for {
+			err := vs.store.Join()
+			if err == nil {
+				if !connected {
+					connected = true
+					glog.V(0).Infoln("Reconnected with master")
+				}
+			} else {
+				if connected {
+					connected = false
+				}
+			}
+			time.Sleep(time.Duration(float32(vs.pulseSeconds*1e3)*(1+rand.Float32())) * time.Millisecond)
+		}
+	}()
+	glog.V(0).Infoln("store joined at", vs.masterNode)
+
+	return vs
+}
diff --git a/go/weed/weed_server/volume_server_handlers.go b/go/weed/weed_server/volume_server_handlers.go
new file mode 100644
index 000000000..4d4de0a27
--- /dev/null
+++ b/go/weed/weed_server/volume_server_handlers.go
@@ -0,0 +1,236 @@
+package weed_server
+
+import (
+	"code.google.com/p/weed-fs/go/glog"
+	"code.google.com/p/weed-fs/go/operation"
+	"code.google.com/p/weed-fs/go/replication"
+	"code.google.com/p/weed-fs/go/storage"
+	"mime"
+	"net/http"
+	"strconv"
+	"strings"
+	"time"
+)
+
+var fileNameEscaper = strings.NewReplacer("\\", "\\\\", "\"", "\\\"")
+
+func (vs *VolumeServer) statusHandler(w http.ResponseWriter, r *http.Request) {
+	m := make(map[string]interface{})
+	m["Version"] = vs.version
+	m["Volumes"] = vs.store.Status()
+	writeJsonQuiet(w, r, m)
+}
+func (vs *VolumeServer) assignVolumeHandler(w http.ResponseWriter, r *http.Request) {
+	err := vs.store.AddVolume(r.FormValue("volume"), r.FormValue("collection"), r.FormValue("replicationType"))
+	if err == nil {
+		writeJsonQuiet(w, r, map[string]string{"error": ""})
+	} else {
+		writeJsonQuiet(w, r, map[string]string{"error": err.Error()})
+	}
+	debug("assign volume =", r.FormValue("volume"), ", collection =", r.FormValue("collection"), ", replicationType =", r.FormValue("replicationType"), ", error =", err)
+}
+func (vs *VolumeServer) vacuumVolumeCheckHandler(w http.ResponseWriter, r *http.Request) {
+	err, ret := vs.store.CheckCompactVolume(r.FormValue("volume"), r.FormValue("garbageThreshold"))
+	if err == nil {
+		writeJsonQuiet(w, r, map[string]interface{}{"error": "", "result": ret})
+	} else {
+		writeJsonQuiet(w, r, map[string]interface{}{"error": err.Error(), "result": false})
+	}
+	debug("checked compacting volume =", r.FormValue("volume"), "garbageThreshold =", r.FormValue("garbageThreshold"), "vacuum =", ret)
+}
+func (vs *VolumeServer) vacuumVolumeCompactHandler(w http.ResponseWriter, r *http.Request) {
+	err := vs.store.CompactVolume(r.FormValue("volume"))
+	if err == nil {
+		writeJsonQuiet(w, r, map[string]string{"error": ""})
+	} else {
+		writeJsonQuiet(w, r, map[string]string{"error": err.Error()})
+	}
+	debug("compacted volume =", r.FormValue("volume"), ", error =", err)
+}
+func (vs *VolumeServer) vacuumVolumeCommitHandler(w http.ResponseWriter, r *http.Request) {
+	err := vs.store.CommitCompactVolume(r.FormValue("volume"))
+	if err == nil {
+		writeJsonQuiet(w, r, map[string]interface{}{"error": ""})
+	} else {
+		writeJsonQuiet(w, r, map[string]string{"error": err.Error()})
+	}
+	debug("commit compact volume =", r.FormValue("volume"), ", error =", err)
+}
+func (vs *VolumeServer) freezeVolumeHandler(w http.ResponseWriter, r *http.Request) {
+	//TODO: notify master that this volume will be read-only
+	err := vs.store.FreezeVolume(r.FormValue("volume"))
+	if err == nil {
+		writeJsonQuiet(w, r, map[string]interface{}{"error": ""})
+	} else {
+		writeJsonQuiet(w, r, map[string]string{"error": err.Error()})
+	}
+	debug("freeze volume =", r.FormValue("volume"), ", error =", err)
+}
+func (vs *VolumeServer) submitFromVolumeServerHandler(w http.ResponseWriter, r *http.Request) {
+	submitForClientHandler(w, r, vs.masterNode)
+}
+
+func (vs *VolumeServer) storeHandler(w http.ResponseWriter, r *http.Request) {
+	switch r.Method {
+	case "GET":
+		vs.GetOrHeadHandler(w, r, true)
+	case "HEAD":
+		vs.GetOrHeadHandler(w, r, false)
+	case "DELETE":
+		secure(vs.whiteList, vs.DeleteHandler)(w, r)
+	case "PUT":
+		secure(vs.whiteList, vs.PostHandler)(w, r)
+	case "POST":
+		secure(vs.whiteList, vs.PostHandler)(w, r)
+	}
+}
+func (vs *VolumeServer) GetOrHeadHandler(w http.ResponseWriter, r *http.Request, isGetMethod bool) {
+	n := new(storage.Needle)
+	vid, fid, filename, ext, _ := parseURLPath(r.URL.Path)
+	volumeId, err := storage.NewVolumeId(vid)
+	if err != nil {
+		debug("parsing error:", err, r.URL.Path)
+		return
+	}
+	n.ParsePath(fid)
+
+	debug("volume", volumeId, "reading", n)
+	if !vs.store.HasVolume(volumeId) {
+		lookupResult, err := operation.Lookup(vs.masterNode, volumeId)
+		debug("volume", volumeId, "found on", lookupResult, "error", err)
+		if err == nil {
+			http.Redirect(w, r, "http://"+lookupResult.Locations[0].PublicUrl+r.URL.Path, http.StatusMovedPermanently)
+		} else {
+			debug("lookup error:", err, r.URL.Path)
+			w.WriteHeader(http.StatusNotFound)
+		}
+		return
+	}
+	cookie := n.Cookie
+	count, e := vs.store.Read(volumeId, n)
+	debug("read bytes", count, "error", e)
+	if e != nil || count <= 0 {
+		debug("read error:", e, r.URL.Path)
+		w.WriteHeader(http.StatusNotFound)
+		return
+	}
+	if n.Cookie != cookie {
+		glog.V(0).Infoln("request with unmaching cookie from ", r.RemoteAddr, "agent", r.UserAgent())
+		w.WriteHeader(http.StatusNotFound)
+		return
+	}
+	if n.LastModified != 0 {
+		w.Header().Set("Last-Modified", time.Unix(int64(n.LastModified), 0).UTC().Format(http.TimeFormat))
+		if r.Header.Get("If-Modified-Since") != "" {
+			if t, parseError := time.Parse(http.TimeFormat, r.Header.Get("If-Modified-Since")); parseError == nil {
+				if t.Unix() >= int64(n.LastModified) {
+					w.WriteHeader(http.StatusNotModified)
+					return
+				}
+			}
+		}
+	}
+	if n.NameSize > 0 && filename == "" {
+		filename = string(n.Name)
+		dotIndex := strings.LastIndex(filename, ".")
+		if dotIndex > 0 {
+			ext = filename[dotIndex:]
+		}
+	}
+	mtype := ""
+	if ext != "" {
+		mtype = mime.TypeByExtension(ext)
+	}
+	if n.MimeSize > 0 {
+		mtype = string(n.Mime)
+	}
+	if mtype != "" {
+		w.Header().Set("Content-Type", mtype)
+	}
+	if filename != "" {
+		w.Header().Set("Content-Disposition", "filename="+fileNameEscaper.Replace(filename))
+	}
+	if ext != ".gz" {
+		if n.IsGzipped() {
+			if strings.Contains(r.Header.Get("Accept-Encoding"), "gzip") {
+				w.Header().Set("Content-Encoding", "gzip")
+			} else {
+				if n.Data, err = storage.UnGzipData(n.Data); err != nil {
+					debug("lookup error:", err, r.URL.Path)
+				}
+			}
+		}
+	}
+	w.Header().Set("Content-Length", strconv.Itoa(len(n.Data)))
+	if isGetMethod {
+		if _, e = w.Write(n.Data); e != nil {
+			debug("response write error:", e)
+		}
+	}
+}
+func (vs *VolumeServer) PostHandler(w http.ResponseWriter, r *http.Request) {
+	m := make(map[string]interface{})
+	if e := r.ParseForm(); e != nil {
+		debug("form parse error:", e)
+		writeJsonError(w, r, e)
+		return
+	}
+	vid, _, _, _, _ := parseURLPath(r.URL.Path)
+	volumeId, ve := storage.NewVolumeId(vid)
+	if ve != nil {
+		debug("NewVolumeId error:", ve)
+		writeJsonError(w, r, ve)
+		return
+	}
+	needle, ne := storage.NewNeedle(r)
+	if ne != nil {
+		writeJsonError(w, r, ne)
+		return
+	}
+	ret, errorStatus := replication.ReplicatedWrite(vs.masterNode, vs.store, volumeId, needle, r)
+	if errorStatus == "" {
+		w.WriteHeader(http.StatusCreated)
+	} else {
+		w.WriteHeader(http.StatusInternalServerError)
+		m["error"] = errorStatus
+	}
+	m["size"] = ret
+	writeJsonQuiet(w, r, m)
+}
+func (vs *VolumeServer) DeleteHandler(w http.ResponseWriter, r *http.Request) {
+	n := new(storage.Needle)
+	vid, fid, _, _, _ := parseURLPath(r.URL.Path)
+	volumeId, _ := storage.NewVolumeId(vid)
+	n.ParsePath(fid)
+
+	debug("deleting", n)
+
+	cookie := n.Cookie
+	count, ok := vs.store.Read(volumeId, n)
+
+	if ok != nil {
+		m := make(map[string]uint32)
+		m["size"] = 0
+		writeJsonQuiet(w, r, m)
+		return
+	}
+
+	if n.Cookie != cookie {
+		glog.V(0).Infoln("delete with unmaching cookie from ", r.RemoteAddr, "agent", r.UserAgent())
+		return
+	}
+
+	n.Size = 0
+	ret := replication.ReplicatedDelete(vs.masterNode, vs.store, volumeId, n, r)
+
+	if ret != 0 {
+		w.WriteHeader(http.StatusAccepted)
+	} else {
+		w.WriteHeader(http.StatusInternalServerError)
+	}
+
+	m := make(map[string]uint32)
+	m["size"] = uint32(count)
+	writeJsonQuiet(w, r, m)
+}
+