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package weed_server
import (
"context"
"encoding/json"
"net/http"
"strings"
"github.com/chrislusf/seaweedfs/weed/glog"
"github.com/chrislusf/seaweedfs/weed/pb/volume_server_pb"
"github.com/chrislusf/seaweedfs/weed/storage/needle"
"github.com/chrislusf/seaweedfs/weed/util"
)
func (vs *VolumeServer) FileGet(req *volume_server_pb.FileGetRequest, stream volume_server_pb.VolumeServer_FileGetServer) error {
headResponse := &volume_server_pb.FileGetResponse{}
n := new(needle.Needle)
commaIndex := strings.LastIndex(req.FileId, ",")
vid := req.FileId[:commaIndex]
fid := req.FileId[commaIndex+1:]
volumeId, err := needle.NewVolumeId(vid)
if err != nil {
headResponse.ErrorCode = http.StatusBadRequest
return stream.Send(headResponse)
}
err = n.ParsePath(fid)
if err != nil {
headResponse.ErrorCode = http.StatusBadRequest
return stream.Send(headResponse)
}
hasVolume := vs.store.HasVolume(volumeId)
_, hasEcVolume := vs.store.FindEcVolume(volumeId)
if !hasVolume && !hasEcVolume {
headResponse.ErrorCode = http.StatusMovedPermanently
return stream.Send(headResponse)
}
cookie := n.Cookie
var count int
if hasVolume {
count, err = vs.store.ReadVolumeNeedle(volumeId, n)
} else if hasEcVolume {
count, err = vs.store.ReadEcShardNeedle(context.Background(), volumeId, n)
}
if err != nil || count < 0 {
headResponse.ErrorCode = http.StatusNotFound
return stream.Send(headResponse)
}
if n.Cookie != cookie {
headResponse.ErrorCode = http.StatusNotFound
return stream.Send(headResponse)
}
if n.LastModified != 0 {
headResponse.LastModified = n.LastModified
}
headResponse.Etag = n.Etag()
if n.HasPairs() {
pairMap := make(map[string]string)
err = json.Unmarshal(n.Pairs, &pairMap)
if err != nil {
glog.V(0).Infoln("Unmarshal pairs error:", err)
}
headResponse.Headers = pairMap
}
/*
// skip this, no redirection
if vs.tryHandleChunkedFile(n, filename, w, r) {
return
}
*/
if n.NameSize > 0 {
headResponse.Filename = string(n.Name)
}
mtype := ""
if n.MimeSize > 0 {
mt := string(n.Mime)
if !strings.HasPrefix(mt, "application/octet-stream") {
mtype = mt
}
}
headResponse.ContentType = mtype
headResponse.IsGzipped = n.IsGzipped()
if n.IsGzipped() && req.AcceptGzip {
if n.Data, err = util.UnGzipData(n.Data); err != nil {
glog.V(0).Infof("ungzip %s error: %v", req.FileId, err)
}
}
headResponse.ContentLength = uint32(len(n.Data))
bytesToRead := len(n.Data)
bytesRead := 0
t := headResponse
for bytesRead < bytesToRead {
stopIndex := bytesRead + BufferSizeLimit
if stopIndex > bytesToRead {
stopIndex = bytesToRead
}
if t == nil {
t = &volume_server_pb.FileGetResponse{}
}
t.Data = n.Data[bytesRead:stopIndex]
err = stream.Send(t)
t = nil
if err != nil {
return err
}
bytesRead = stopIndex
}
return nil
}
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