minio/rpc-server.go

220 lines
6.2 KiB
Go

package main
import (
"io"
"net/http"
"net/rpc"
"strconv"
"github.com/Sirupsen/logrus"
router "github.com/gorilla/mux"
)
// Storage server implements rpc primitives to facilitate exporting a
// disk over a network.
type storageServer struct {
storage StorageAPI
}
/// Volume operations handlers
// MakeVolHandler - make vol handler is rpc wrapper for MakeVol operation.
func (s *storageServer) MakeVolHandler(arg *string, reply *GenericReply) error {
err := s.storage.MakeVol(*arg)
if err != nil {
log.WithFields(logrus.Fields{
"volume": *arg,
}).Debugf("MakeVol failed with error %s", err)
return err
}
return nil
}
// ListVolsHandler - list vols handler is rpc wrapper for ListVols operation.
func (s *storageServer) ListVolsHandler(arg *string, reply *ListVolsReply) error {
vols, err := s.storage.ListVols()
if err != nil {
log.Debugf("Listsvols failed with error %s", err)
return err
}
reply.Vols = vols
return nil
}
// StatVolHandler - stat vol handler is a rpc wrapper for StatVol operation.
func (s *storageServer) StatVolHandler(arg *string, reply *VolInfo) error {
volInfo, err := s.storage.StatVol(*arg)
if err != nil {
log.WithFields(logrus.Fields{
"volume": *arg,
}).Debugf("StatVol failed with error %s", err)
return err
}
*reply = volInfo
return nil
}
// DeleteVolHandler - delete vol handler is a rpc wrapper for
// DeleteVol operation.
func (s *storageServer) DeleteVolHandler(arg *string, reply *GenericReply) error {
err := s.storage.DeleteVol(*arg)
if err != nil {
log.WithFields(logrus.Fields{
"volume": *arg,
}).Debugf("DeleteVol failed with error %s", err)
return err
}
return nil
}
/// File operations
// StatFileHandler - stat file handler is rpc wrapper to stat file.
func (s *storageServer) StatFileHandler(arg *StatFileArgs, reply *FileInfo) error {
fileInfo, err := s.storage.StatFile(arg.Vol, arg.Path)
if err != nil {
log.WithFields(logrus.Fields{
"volume": arg.Vol,
"path": arg.Path,
}).Debugf("StatFile failed with error %s", err)
return err
}
*reply = fileInfo
return nil
}
// ListDirHandler - list directory handler is rpc wrapper to list dir.
func (s *storageServer) ListDirHandler(arg *ListDirArgs, reply *[]string) error {
entries, err := s.storage.ListDir(arg.Vol, arg.Path)
if err != nil {
log.WithFields(logrus.Fields{
"volume": arg.Vol,
"path": arg.Path,
}).Debugf("ListDir failed with error %s", err)
return err
}
*reply = entries
return nil
}
// DeleteFileHandler - delete file handler is rpc wrapper to delete file.
func (s *storageServer) DeleteFileHandler(arg *DeleteFileArgs, reply *GenericReply) error {
err := s.storage.DeleteFile(arg.Vol, arg.Path)
if err != nil {
log.WithFields(logrus.Fields{
"volume": arg.Vol,
"path": arg.Path,
}).Debugf("DeleteFile failed with error %s", err)
return err
}
return nil
}
// RenameFileHandler - rename file handler is rpc wrapper to rename file.
func (s *storageServer) RenameFileHandler(arg *RenameFileArgs, reply *GenericReply) error {
err := s.storage.RenameFile(arg.SrcVol, arg.SrcPath, arg.DstVol, arg.DstPath)
if err != nil {
log.WithFields(logrus.Fields{
"srcVolume": arg.SrcVol,
"srcPath": arg.SrcPath,
"dstVolume": arg.DstVol,
"dstPath": arg.DstPath,
}).Errorf("RenameFile failed with error %s", err)
return err
}
return nil
}
// Initialize new storage rpc.
func newRPCServer(exportPath string) (*storageServer, error) {
// Initialize posix storage API.
storage, err := newPosix(exportPath)
if err != nil && err != errDiskNotFound {
return nil, err
}
return &storageServer{
storage: storage,
}, nil
}
// registerStorageRPCRouter - register storage rpc router.
func registerStorageRPCRouter(mux *router.Router, stServer *storageServer) {
storageRPCServer := rpc.NewServer()
storageRPCServer.RegisterName("Storage", stServer)
storageRouter := mux.NewRoute().PathPrefix(reservedBucket).Subrouter()
// Add minio storage routes.
storageRouter.Path("/storage").Handler(storageRPCServer)
// StreamUpload - stream upload handler.
storageRouter.Methods("POST").Path("/storage/upload/{volume}/{path:.+}").HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
vars := router.Vars(r)
volume := vars["volume"]
path := vars["path"]
writeCloser, err := stServer.storage.CreateFile(volume, path)
if err != nil {
log.WithFields(logrus.Fields{
"volume": volume,
"path": path,
}).Debugf("CreateFile failed with error %s", err)
httpErr := http.StatusInternalServerError
if err == errVolumeNotFound {
httpErr = http.StatusNotFound
} else if err == errIsNotRegular {
httpErr = http.StatusConflict
}
http.Error(w, err.Error(), httpErr)
return
}
reader := r.Body
if _, err = io.Copy(writeCloser, reader); err != nil {
log.WithFields(logrus.Fields{
"volume": volume,
"path": path,
}).Debugf("Copying incoming reader to writer failed %s", err)
safeCloseAndRemove(writeCloser)
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
writeCloser.Close()
reader.Close()
})
// StreamDownloadHandler - stream download handler.
storageRouter.Methods("GET").Path("/storage/download/{volume}/{path:.+}").Queries("offset", "{offset:.*}").HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
vars := router.Vars(r)
volume := vars["volume"]
path := vars["path"]
offset, err := strconv.ParseInt(r.URL.Query().Get("offset"), 10, 64)
if err != nil {
log.WithFields(logrus.Fields{
"volume": volume,
"path": path,
}).Debugf("Parse offset failure with error %s", err)
http.Error(w, err.Error(), http.StatusBadRequest)
return
}
readCloser, err := stServer.storage.ReadFile(volume, path, offset)
if err != nil {
log.WithFields(logrus.Fields{
"volume": volume,
"path": path,
}).Debugf("ReadFile failed with error %s", err)
httpErr := http.StatusBadRequest
if err == errVolumeNotFound {
httpErr = http.StatusNotFound
} else if err == errFileNotFound {
httpErr = http.StatusNotFound
}
http.Error(w, err.Error(), httpErr)
return
}
// Copy reader to writer.
io.Copy(w, readCloser)
// Flush out any remaining buffers to client.
w.(http.Flusher).Flush()
// Close the reader.
readCloser.Close()
})
}