func readChunkNeedle(fileUrl string, w io.Writer, offset int64) (written int64, e error) {
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.Do(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 (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
}
urlLocation, err := operation.LookupFileId(fs.master, fileId)
if err != nil {
glog.V(1).Infoln("operation LookupFileId %s failed, err is %s", fileId, err.Error())
w.WriteHeader(http.StatusNotFound)
return
}
urlString := urlLocation
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.Do(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 (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
}
parts := strings.Split(fileId, ",")
if len(parts) != 2 {
glog.V(1).Infoln("Invalid fileId", fileId)
w.WriteHeader(http.StatusNotFound)
return
}
lookup, lookupError := operation.Lookup(fs.master, parts[0])
if lookupError != nil {
glog.V(1).Infoln("Invalid lookup", lookupError.Error())
w.WriteHeader(http.StatusNotFound)
return
}
if len(lookup.Locations) == 0 {
glog.V(1).Infoln("Can not find location for volume", parts[0])
w.WriteHeader(http.StatusNotFound)
return
}
urlLocation := lookup.Locations[rand.Intn(len(lookup.Locations))].Url
urlString := "http://" + urlLocation + "/" + fileId
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.Do(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 (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
}
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
}
u, _ := url.Parse("http://" + assignResult.Url + "/" + assignResult.Fid)
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.Do(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, assignResult.Fid, fs.jwt(assignResult.Fid)) //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, "=>", assignResult.Fid)
if db_err := fs.filer.CreateFile(path, assignResult.Fid); db_err != nil {
operation.DeleteFile(fs.master, assignResult.Fid, fs.jwt(assignResult.Fid)) //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)
}
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)
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.Do(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, 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, 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)
}