lotus/storage/sector/stores/http_handler.go
2020-08-16 11:09:58 +01:00

156 lines
3.2 KiB
Go

package stores
import (
"encoding/json"
"io"
"net/http"
"os"
"github.com/gorilla/mux"
logging "github.com/ipfs/go-log/v2"
"golang.org/x/xerrors"
"github.com/filecoin-project/lotus/storage/sector/tarutil"
)
var log = logging.Logger("stores")
type FetchHandler struct {
*Local
}
func (handler *FetchHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) { // /remote/
mux := mux.NewRouter()
mux.HandleFunc("/remote/stat/{id}", handler.remoteStatFs).Methods("GET")
mux.HandleFunc("/remote/{type}/{id}", handler.remoteGetSector).Methods("GET")
mux.HandleFunc("/remote/{type}/{id}", handler.remoteDeleteSector).Methods("DELETE")
mux.ServeHTTP(w, r)
}
func (handler *FetchHandler) remoteStatFs(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
id := ID(vars["id"])
st, err := handler.Local.FsStat(r.Context(), id)
switch err {
case errPathNotFound:
w.WriteHeader(404)
return
case nil:
break
default:
w.WriteHeader(500)
log.Errorf("%+v", err)
return
}
if err := json.NewEncoder(w).Encode(&st); err != nil {
log.Warnf("error writing stat response: %+v", err)
}
}
func (handler *FetchHandler) remoteGetSector(w http.ResponseWriter, r *http.Request) {
log.Infof("SERVE GET %s", r.URL)
vars := mux.Vars(r)
id, err := ParseSectorID(vars["id"])
if err != nil {
log.Error("%+v", err)
w.WriteHeader(500)
return
}
ft, err := ftFromString(vars["type"])
if err != nil {
log.Error("%+v", err)
w.WriteHeader(500)
return
}
// The caller has a lock on this sector already, no need to get one here
// passing 0 spt because we don't allocate anything
paths, _, err := handler.Local.AcquireSector(r.Context(), id, 0, ft, FTNone, PathStorage, AcquireMove)
if err != nil {
log.Error("%+v", err)
w.WriteHeader(500)
return
}
// TODO: reserve local storage here
path := PathByType(paths, ft)
if path == "" {
log.Error("acquired path was empty")
w.WriteHeader(500)
return
}
stat, err := os.Stat(path)
if err != nil {
log.Error("%+v", err)
w.WriteHeader(500)
return
}
var rd io.Reader
if stat.IsDir() {
rd, err = tarutil.TarDirectory(path)
w.Header().Set("Content-Type", "application/x-tar")
} else {
rd, err = os.OpenFile(path, os.O_RDONLY, 0644)
w.Header().Set("Content-Type", "application/octet-stream")
}
if err != nil {
log.Error("%+v", err)
w.WriteHeader(500)
return
}
w.WriteHeader(200)
if _, err := io.Copy(w, rd); err != nil { // TODO: default 32k buf may be too small
log.Error("%+v", err)
return
}
}
func (handler *FetchHandler) remoteDeleteSector(w http.ResponseWriter, r *http.Request) {
log.Infof("SERVE DELETE %s", r.URL)
vars := mux.Vars(r)
id, err := ParseSectorID(vars["id"])
if err != nil {
log.Error("%+v", err)
w.WriteHeader(500)
return
}
ft, err := ftFromString(vars["type"])
if err != nil {
log.Error("%+v", err)
w.WriteHeader(500)
return
}
if err := handler.Remove(r.Context(), id, ft, false); err != nil {
log.Error("%+v", err)
w.WriteHeader(500)
return
}
}
func ftFromString(t string) (SectorFileType, error) {
switch t {
case FTUnsealed.String():
return FTUnsealed, nil
case FTSealed.String():
return FTSealed, nil
case FTCache.String():
return FTCache, nil
default:
return 0, xerrors.Errorf("unknown sector file type: '%s'", t)
}
}