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package weed_server
import (
"fmt"
"net/http"
"strconv"
"strings"
"github.com/chrislusf/seaweedfs/weed/operation"
"github.com/chrislusf/seaweedfs/weed/stats"
"github.com/chrislusf/seaweedfs/weed/storage"
)
func (ms *MasterServer) lookupVolumeId(vids []string, collection string) (volumeLocations map[string]operation.LookupResult) {
volumeLocations = make(map[string]operation.LookupResult)
for _, vid := range vids {
commaSep := strings.Index(vid, ",")
if commaSep > 0 {
vid = vid[0:commaSep]
}
if _, ok := volumeLocations[vid]; ok {
continue
}
volumeId, err := storage.NewVolumeId(vid)
if err == nil {
machines := ms.Topo.Lookup(collection, volumeId)
if machines != nil {
var ret []operation.Location
for _, dn := range machines {
ret = append(ret, operation.Location{Url: dn.Url(), PublicUrl: dn.PublicUrl})
}
volumeLocations[vid] = operation.LookupResult{VolumeId: vid, Locations: ret}
} else {
volumeLocations[vid] = operation.LookupResult{VolumeId: vid, Error: "volumeId not found."}
}
} else {
volumeLocations[vid] = operation.LookupResult{VolumeId: vid, Error: "Unknown volumeId format."}
}
}
return
}
// Takes one volumeId only, can not do batch lookup
func (ms *MasterServer) dirLookupHandler(w http.ResponseWriter, r *http.Request) {
vid := r.FormValue("volumeId")
commaSep := strings.Index(vid, ",")
if commaSep > 0 {
vid = vid[0:commaSep]
}
vids := []string{vid}
collection := r.FormValue("collection") //optional, but can be faster if too many collections
volumeLocations := ms.lookupVolumeId(vids, collection)
location := volumeLocations[vid]
httpStatus := http.StatusOK
if location.Error != "" {
httpStatus = http.StatusNotFound
}
writeJsonQuiet(w, r, httpStatus, location)
}
// This can take batched volumeIds, &volumeId=x&volumeId=y&volumeId=z
func (ms *MasterServer) volumeLookupHandler(w http.ResponseWriter, r *http.Request) {
r.ParseForm()
vids := r.Form["volumeId"]
collection := r.FormValue("collection") //optional, but can be faster if too many collections
volumeLocations := ms.lookupVolumeId(vids, collection)
writeJsonQuiet(w, r, http.StatusOK, volumeLocations)
}
func (ms *MasterServer) dirAssignHandler(w http.ResponseWriter, r *http.Request) {
stats.AssignRequest()
requestedCount, e := strconv.ParseUint(r.FormValue("count"), 10, 64)
if e != nil || requestedCount == 0 {
requestedCount = 1
}
option, err := ms.getVolumeGrowOption(r)
if err != nil {
writeJsonQuiet(w, r, http.StatusNotAcceptable, operation.AssignResult{Error: err.Error()})
return
}
if !ms.Topo.HasWritableVolume(option) {
if ms.Topo.FreeSpace() <= 0 {
writeJsonQuiet(w, r, http.StatusNotFound, operation.AssignResult{Error: "No free volumes left!"})
return
}
ms.vgLock.Lock()
defer ms.vgLock.Unlock()
if !ms.Topo.HasWritableVolume(option) {
if _, err = ms.vg.AutomaticGrowByType(option, ms.Topo); err != nil {
writeJsonError(w, r, http.StatusInternalServerError,
fmt.Errorf("Cannot grow volume group! %v", err))
return
}
}
}
fid, count, dn, err := ms.Topo.PickForWrite(requestedCount, option)
if err == nil {
writeJsonQuiet(w, r, http.StatusOK, operation.AssignResult{Fid: fid, Url: dn.Url(), PublicUrl: dn.PublicUrl, Count: count})
} else {
writeJsonQuiet(w, r, http.StatusNotAcceptable, operation.AssignResult{Error: err.Error()})
}
}
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