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package weed_server
import (
"fmt"
"net/http"
"strconv"
"strings"
"github.com/chrislusf/seaweedfs/weed/operation"
"github.com/chrislusf/seaweedfs/weed/security"
"github.com/chrislusf/seaweedfs/weed/stats"
"github.com/chrislusf/seaweedfs/weed/storage/needle"
)
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
}
volumeLocations[vid] = ms.findVolumeLocation(collection, vid)
}
return
}
// If "fileId" is provided, this returns the fileId location and a JWT to update or delete the file.
// If "volumeId" is provided, this only returns the volumeId location
func (ms *MasterServer) dirLookupHandler(w http.ResponseWriter, r *http.Request) {
vid := r.FormValue("volumeId")
if vid != "" {
// backward compatible
commaSep := strings.Index(vid, ",")
if commaSep > 0 {
vid = vid[0:commaSep]
}
}
fileId := r.FormValue("fileId")
if fileId != "" {
commaSep := strings.Index(fileId, ",")
if commaSep > 0 {
vid = fileId[0:commaSep]
}
}
collection := r.FormValue("collection") //optional, but can be faster if too many collections
location := ms.findVolumeLocation(collection, vid)
httpStatus := http.StatusOK
if location.Error != "" || location.Locations == nil {
httpStatus = http.StatusNotFound
} else {
forRead := r.FormValue("read")
isRead := forRead == "yes"
ms.maybeAddJwtAuthorization(w, fileId, !isRead)
}
writeJsonQuiet(w, r, httpStatus, location)
}
// findVolumeLocation finds the volume location from master topo if it is leader,
// or from master client if not leader
func (ms *MasterServer) findVolumeLocation(collection, vid string) operation.LookupResult {
var locations []operation.Location
var err error
if ms.Topo.IsLeader() {
volumeId, newVolumeIdErr := needle.NewVolumeId(vid)
if newVolumeIdErr != nil {
err = fmt.Errorf("Unknown volume id %s", vid)
} else {
machines := ms.Topo.Lookup(collection, volumeId)
for _, loc := range machines {
locations = append(locations, operation.Location{Url: loc.Url(), PublicUrl: loc.PublicUrl})
}
if locations == nil {
err = fmt.Errorf("volume id %s not found", vid)
}
}
} else {
machines, getVidLocationsErr := ms.MasterClient.GetVidLocations(vid)
for _, loc := range machines {
locations = append(locations, operation.Location{Url: loc.Url, PublicUrl: loc.PublicUrl})
}
err = getVidLocationsErr
}
ret := operation.LookupResult{
VolumeId: vid,
Locations: locations,
}
if err != nil {
ret.Error = err.Error()
}
return ret
}
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
}
writableVolumeCount, e := strconv.Atoi(r.FormValue("writableVolumeCount"))
if e != nil {
writableVolumeCount = 0
}
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.grpcDialOption, ms.Topo, writableVolumeCount); 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 {
ms.maybeAddJwtAuthorization(w, fid, true)
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()})
}
}
func (ms *MasterServer) maybeAddJwtAuthorization(w http.ResponseWriter, fileId string, isWrite bool) {
var encodedJwt security.EncodedJwt
if isWrite {
encodedJwt = security.GenJwt(ms.guard.SigningKey, ms.guard.ExpiresAfterSec, fileId)
} else {
encodedJwt = security.GenJwt(ms.guard.ReadSigningKey, ms.guard.ReadExpiresAfterSec, fileId)
}
if encodedJwt == "" {
return
}
w.Header().Set("Authorization", "BEARER "+string(encodedJwt))
}
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