seaweedfs/weed/server/filer_server_handlers_write_upload.go

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package weed_server
import (
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"bytes"
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"crypto/md5"
"hash"
"io"
"io/ioutil"
"net/http"
"strings"
"time"
"github.com/chrislusf/seaweedfs/weed/filer"
"github.com/chrislusf/seaweedfs/weed/glog"
"github.com/chrislusf/seaweedfs/weed/operation"
"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
"github.com/chrislusf/seaweedfs/weed/security"
"github.com/chrislusf/seaweedfs/weed/stats"
"github.com/chrislusf/seaweedfs/weed/util"
)
func (fs *FilerServer) uploadReaderToChunks(w http.ResponseWriter, r *http.Request, reader io.Reader, chunkSize int32, fileName, contentType string, contentLength int64, so *operation.StorageOption) ([]*filer_pb.FileChunk, hash.Hash, int64, error, []byte) {
var fileChunks []*filer_pb.FileChunk
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md5Hash := md5.New()
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var partReader = ioutil.NopCloser(io.TeeReader(reader, md5Hash))
chunkOffset := int64(0)
var smallContent []byte
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for {
limitedReader := io.LimitReader(partReader, int64(chunkSize))
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data, err := ioutil.ReadAll(limitedReader)
if err != nil {
return nil, nil, 0, err, nil
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}
if chunkOffset == 0 && !isAppend(r) {
if len(data) < int(fs.option.SaveToFilerLimit) || strings.HasPrefix(r.URL.Path, filer.DirectoryEtcRoot) && len(data) < 4*1024 {
smallContent = data
chunkOffset += int64(len(data))
break
}
}
dataReader := util.NewBytesReader(data)
// retry to assign a different file id
var fileId, urlLocation string
var auth security.EncodedJwt
var assignErr, uploadErr error
var uploadResult *operation.UploadResult
for i := 0; i < 3; i++ {
// assign one file id for one chunk
fileId, urlLocation, auth, assignErr = fs.assignNewFileInfo(so)
if assignErr != nil {
return nil, nil, 0, assignErr, nil
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}
// upload the chunk to the volume server
uploadResult, uploadErr, _ = fs.doUpload(urlLocation, w, r, dataReader, fileName, contentType, nil, auth)
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if uploadErr != nil {
time.Sleep(251 * time.Millisecond)
continue
}
break
}
if uploadErr != nil {
return nil, nil, 0, uploadErr, nil
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}
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// if last chunk exhausted the reader exactly at the border
if uploadResult.Size == 0 {
break
}
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if chunkOffset == 0 {
uploadedMd5 := util.Base64Md5ToBytes(uploadResult.ContentMd5)
readedMd5 := md5Hash.Sum(nil)
if !bytes.Equal(uploadedMd5, readedMd5) {
glog.Errorf("md5 %x does not match %x uploaded chunk %s to the volume server", readedMd5, uploadedMd5, uploadResult.Name)
}
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}
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// Save to chunk manifest structure
fileChunks = append(fileChunks, uploadResult.ToPbFileChunk(fileId, chunkOffset))
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glog.V(4).Infof("uploaded %s chunk %d to %s [%d,%d)", fileName, len(fileChunks), fileId, chunkOffset, chunkOffset+int64(uploadResult.Size))
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// reset variables for the next chunk
chunkOffset = chunkOffset + int64(uploadResult.Size)
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// if last chunk was not at full chunk size, but already exhausted the reader
if int64(uploadResult.Size) < int64(chunkSize) {
break
}
}
return fileChunks, md5Hash, chunkOffset, nil, smallContent
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}
func (fs *FilerServer) doUpload(urlLocation string, w http.ResponseWriter, r *http.Request, limitedReader io.Reader, fileName string, contentType string, pairMap map[string]string, auth security.EncodedJwt) (*operation.UploadResult, error, []byte) {
stats.FilerRequestCounter.WithLabelValues("chunkUpload").Inc()
start := time.Now()
defer func() {
stats.FilerRequestHistogram.WithLabelValues("chunkUpload").Observe(time.Since(start).Seconds())
}()
uploadResult, err, data := operation.Upload(urlLocation, fileName, fs.option.Cipher, limitedReader, false, contentType, pairMap, auth)
if uploadResult != nil && uploadResult.RetryCount > 0 {
stats.FilerRequestCounter.WithLabelValues("chunkUploadRetry").Add(float64(uploadResult.RetryCount))
}
return uploadResult, err, data
}