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webdav: stream read

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This commit is contained in:
Chris Lu 2020-03-22 01:30:27 -07:00
parent 65d2ea9fb0
commit e93e986727
1 changed files with 15 additions and 11 deletions
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26
weed/server/webdav_server.go
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@ -4,6 +4,7 @@ import (
"context"
"fmt"
"io"
"math"
"os"
"path"
"strings"
@ -89,6 +90,7 @@ type WebDavFile struct {
off int64
entry *filer_pb.Entry
entryViewCache []filer2.VisibleInterval
reader io.ReadSeeker
}
func NewWebDavFileSystem(option *WebDavOption) (webdav.FileSystem, error) {
@ -494,23 +496,25 @@ func (f *WebDavFile) Read(p []byte) (readSize int, err error) {
}
if f.entryViewCache == nil {
f.entryViewCache = filer2.NonOverlappingVisibleIntervals(f.entry.Chunks)
f.reader = nil
}
if f.reader == nil {
chunkViews := filer2.ViewFromVisibleIntervals(f.entryViewCache, 0, math.MaxInt32)
f.reader = filer2.NewChunkStreamReaderFromClient(f.fs, chunkViews)
}
chunkViews := filer2.ViewFromVisibleIntervals(f.entryViewCache, f.off, len(p))
totalRead, err := filer2.ReadIntoBuffer(f.fs, filer2.FullPath(f.name), p, chunkViews, f.off)
f.reader.Seek(f.off, io.SeekStart)
readSize, err = f.reader.Read(p)
glog.V(0).Infof("WebDavFileSystem.Read %v: [%d,%d)", f.name, f.off, f.off+int64(readSize))
f.off += int64(readSize)
if err != nil {
return 0, err
}
readSize = int(totalRead)
glog.V(3).Infof("WebDavFileSystem.Read %v: [%d,%d)", f.name, f.off, f.off+totalRead)
f.off += totalRead
if readSize == 0 {
return 0, io.EOF
glog.Errorf("file read %s: %v", f.name, err)
}
return
}
func (f *WebDavFile) Readdir(count int) (ret []os.FileInfo, err error) {