func (fs *FilerServer) GetOrHeadHandler(w http.ResponseWriter, r *http.Request, isGetMethod bool) {
if strings.HasSuffix(r.URL.Path, "/") {
if fs.disableDirListing {
w.WriteHeader(http.StatusMethodNotAllowed)
return
}
fs.listDirectoryHandler(w, r)
return
}
fileId, err := fs.filer.FindFile(r.URL.Path)
if err == leveldb.ErrNotFound {
glog.V(3).Infoln("Not found in db", r.URL.Path)
w.WriteHeader(http.StatusNotFound)
return
}
query := r.URL.Query()
collection := query.Get("collection")
if collection == "" {
collection = fs.collection
}
urlString, err := operation.LookupFileId(fs.master, fileId, collection, true)
if err != nil {
glog.V(1).Infoln("operation LookupFileId %s failed, err is %s", fileId, err.Error())
w.WriteHeader(http.StatusNotFound)
return
}
if fs.redirectOnRead {
http.Redirect(w, r, urlString, http.StatusFound)
return
}
u, _ := url.Parse(urlString)
request := &http.Request{
Method: r.Method,
URL: u,
Proto: r.Proto,
ProtoMajor: r.ProtoMajor,
ProtoMinor: r.ProtoMinor,
Header: r.Header,
Body: r.Body,
Host: r.Host,
ContentLength: r.ContentLength,
}
glog.V(3).Infoln("retrieving from", u)
resp, do_err := util.HttpDo(request)
if do_err != nil {
glog.V(0).Infoln("failing to connect to volume server", do_err.Error())
writeJsonError(w, r, http.StatusInternalServerError, do_err)
return
}
defer resp.Body.Close()
for k, v := range resp.Header {
w.Header()[k] = v
}
w.WriteHeader(resp.StatusCode)
io.Copy(w, resp.Body)
}
func (cf *ChunkedFileReader) readRemoteChunkNeedle(fid string, w io.Writer, offset int64) (written int64, e error) {
// stream data
fileUrl, lookupError := operation.LookupFileId(cf.Master, fid, cf.Collection, true)
if lookupError != nil {
return 0, lookupError
}
req, err := http.NewRequest("GET", fileUrl, nil)
if err != nil {
return written, err
}
if offset > 0 {
req.Header.Set("Range", fmt.Sprintf("bytes=%d-", offset))
}
resp, err := util.HttpDo(req)
if err != nil {
return written, err
}
defer resp.Body.Close()
switch resp.StatusCode {
case http.StatusRequestedRangeNotSatisfiable:
return written, ErrInvalidRange
case http.StatusOK:
if offset > 0 {
return written, ErrRangeRequestsNotSupported
}
case http.StatusPartialContent:
break
default:
return written, fmt.Errorf("Read chunk needle error: [%d] %s", resp.StatusCode, fileUrl)
}
return io.Copy(w, resp.Body)
}
func (s *Store) ReadRemoteNeedle(fid *FileId, collection string) (*Needle, error) {
cacheKey := fid.String()
if cn, cacheHit := s.needleCache.Get(cacheKey); cacheHit {
glog.V(2).Infoln("Remote needle cache hit:", fid)
return cn.(*Needle), nil
}
glog.V(2).Infoln("Remote needle cache miss:", fid)
vid := fid.VolumeId.String()
lookupResult, err := operation.Lookup(s.GetMaster(), vid, collection)
glog.V(2).Infoln("volume", vid, "found on", lookupResult, "error", err)
if err != nil || len(lookupResult.Locations) == 0 {
return nil, errors.New("lookup error:" + err.Error())
}
u, _ := url.Parse(util.NormalizeUrl(lookupResult.Locations.PickForRead().Url))
u.Path = "/admin/sync/needle"
args := url.Values{
"volume": {vid},
"nid": {fid.Nid()},
}
u.RawQuery = args.Encode()
req, _ := http.NewRequest("GET", u.String(), nil)
resp, err := util.HttpDo(req)
if err != nil {
return nil, err
}
defer resp.Body.Close()
var buf []byte
if buf, err = ioutil.ReadAll(resp.Body); err != nil {
return nil, err
}
if resp.StatusCode != http.StatusOK {
errMsg := strconv.Itoa(resp.StatusCode)
m := map[string]string{}
if e := json.Unmarshal(buf, &m); e == nil {
if s, ok := m["error"]; ok {
errMsg += ", " + s
}
}
return nil, errors.New(errMsg)
}
n := &Needle{
Cookie: fid.Cookie,
Id: fid.Key,
}
n.Data = buf
n.DataSize = uint32(len(n.Data))
if h := resp.Header.Get("Seaweed-Flags"); h != "" {
if i, err := strconv.ParseInt(h, 16, 64); err == nil {
n.Flags = byte(i)
}
}
if h := resp.Header.Get("Seaweed-Checksum"); h != "" {
if i, err := strconv.ParseInt(h, 16, 64); err == nil {
n.Checksum = CRC(i)
newChecksum := NewCRC(n.Data)
if n.Checksum != newChecksum {
return nil, fmt.Errorf("CRC error! Read remote data corrupted (%x!=%x), fid=%v",
n.Checksum, newChecksum, fid.String())
}
}
}
if h := resp.Header.Get("Seaweed-LastModified"); h != "" {
if i, err := strconv.ParseUint(h, 16, 64); err == nil {
n.LastModified = i
n.SetHasLastModifiedDate()
}
}
if h := resp.Header.Get("Seaweed-Name"); h != "" {
n.Name = []byte(h)
n.SetHasName()
}
if h := resp.Header.Get("Seaweed-Mime"); h != "" {
n.Mime = []byte(h)
n.SetHasMime()
}
s.needleCache.Add(cacheKey, n)
return n, nil
}
func (fs *FilerServer) PostHandler(w http.ResponseWriter, r *http.Request) {
query := r.URL.Query()
replication := query.Get("replication")
if replication == "" {
replication = fs.defaultReplication
}
collection := query.Get("collection")
if collection == "" {
collection = fs.collection
}
var fileId string
var err error
var urlLocation string
if r.Method == "PUT" {
buf, _ := ioutil.ReadAll(r.Body)
r.Body = analogueReader{bytes.NewBuffer(buf)}
fileName, _, _, _, _, _, _, pe := storage.ParseUpload(r)
if pe != nil {
glog.V(0).Infoln("failing to parse post body", pe.Error())
writeJsonError(w, r, http.StatusInternalServerError, pe)
return
}
//reconstruct http request body for following new request to volume server
r.Body = analogueReader{bytes.NewBuffer(buf)}
path := r.URL.Path
if strings.HasSuffix(path, "/") {
if fileName != "" {
path += fileName
}
}
if fileId, err = fs.filer.FindFile(path); err != nil && err != leveldb.ErrNotFound {
glog.V(0).Infoln("failing to find path in filer store", path, err.Error())
writeJsonError(w, r, http.StatusInternalServerError, err)
return
} else if fileId != "" && err == nil {
var le error
urlLocation, le = operation.LookupFileId(fs.master, fileId, collection, false)
if le != nil {
glog.V(1).Infoln("operation LookupFileId %s failed, err is %s", fileId, le.Error())
w.WriteHeader(http.StatusNotFound)
return
}
}
} else {
assignResult, ae := operation.Assign(fs.master, 1, replication, collection, query.Get("ttl"))
if ae != nil {
glog.V(0).Infoln("failing to assign a file id", ae.Error())
writeJsonError(w, r, http.StatusInternalServerError, ae)
return
}
fileId = assignResult.Fid
urlLocation = "http://" + assignResult.Url + "/" + assignResult.Fid
}
u, _ := url.Parse(urlLocation)
glog.V(4).Infoln("post to", u)
request := &http.Request{
Method: r.Method,
URL: u,
Proto: r.Proto,
ProtoMajor: r.ProtoMajor,
ProtoMinor: r.ProtoMinor,
Header: r.Header,
Body: r.Body,
Host: r.Host,
ContentLength: r.ContentLength,
}
resp, do_err := util.HttpDo(request)
if do_err != nil {
glog.V(0).Infoln("failing to connect to volume server", r.RequestURI, do_err.Error())
writeJsonError(w, r, http.StatusInternalServerError, do_err)
return
}
defer resp.Body.Close()
resp_body, ra_err := ioutil.ReadAll(resp.Body)
if ra_err != nil {
glog.V(0).Infoln("failing to upload to volume server", r.RequestURI, ra_err.Error())
writeJsonError(w, r, http.StatusInternalServerError, ra_err)
return
}
glog.V(4).Infoln("post result", string(resp_body))
var ret operation.UploadResult
unmarshal_err := json.Unmarshal(resp_body, &ret)
if unmarshal_err != nil {
glog.V(0).Infoln("failing to read upload resonse", r.RequestURI, string(resp_body))
writeJsonError(w, r, http.StatusInternalServerError, unmarshal_err)
return
}
if ret.Error != "" {
glog.V(0).Infoln("failing to post to volume server", r.RequestURI, ret.Error)
writeJsonError(w, r, http.StatusInternalServerError, errors.New(ret.Error))
return
}
path := r.URL.Path
if strings.HasSuffix(path, "/") {
if ret.Name != "" {
path += ret.Name
} else {
operation.DeleteFile(fs.master, fileId, collection, fs.jwt(fileId)) //clean up
glog.V(0).Infoln("Can not to write to folder", path, "without a file name!")
writeJsonError(w, r, http.StatusInternalServerError,
errors.New("Can not to write to folder "+path+" without a file name"))
return
}
}
glog.V(4).Infoln("saving", path, "=>", fileId)
if db_err := fs.filer.CreateFile(path, fileId); db_err != nil {
operation.DeleteFile(fs.master, fileId, collection, fs.jwt(fileId)) //clean up
glog.V(0).Infof("failing to write %s to filer server : %v", path, db_err)
writeJsonError(w, r, http.StatusInternalServerError, db_err)
return
}
w.WriteHeader(http.StatusCreated)
w.Write(resp_body)
}