add option to split large files into parts and then upload

1 files changed, 51 insertions, 10 deletions

diff --git a/go/operation/submit.go b/go/operation/submit.go
index d24a89b2b..e922a8834 100644
--- a/go/operation/submit.go
+++ b/go/operation/submit.go
@@ -1,6 +1,7 @@
 package operation
 
 import (
+	"bytes"
 	"code.google.com/p/weed-fs/go/glog"
 	"io"
 	"mime"
@@ -11,8 +12,9 @@ import (
 )
 
 type FilePart struct {
-	Reader    io.Reader //required, all rest are optional
+	Reader    io.Reader
 	FileName  string
+	FileSize  int64
 	IsGzipped bool
 	MimeType  string
 	ModTime   int64 //in seconds
@@ -26,7 +28,7 @@ type SubmitResult struct {
 	Error    string `json:"error"`
 }
 
-func SubmitFiles(master string, files []FilePart, replication string) ([]SubmitResult, error) {
+func SubmitFiles(master string, files []FilePart, replication string, maxMB int) ([]SubmitResult, error) {
 	results := make([]SubmitResult, len(files))
 	for index, file := range files {
 		results[index].FileName = file.FileName
@@ -43,7 +45,7 @@ func SubmitFiles(master string, files []FilePart, replication string) ([]SubmitR
 		if index > 0 {
 			fid = fid + "_" + strconv.Itoa(index)
 		}
-		results[index].Size, err = file.Upload(ret.PublicUrl, fid)
+		results[index].Size, err = file.upload(ret.PublicUrl, fid, maxMB, master, replication)
 		if err != nil {
 			fid = ""
 			results[index].Error = err.Error()
@@ -57,13 +59,13 @@ func SubmitFiles(master string, files []FilePart, replication string) ([]SubmitR
 func NewFileParts(fullPathFilenames []string) (ret []FilePart, err error) {
 	ret = make([]FilePart, len(fullPathFilenames))
 	for index, file := range fullPathFilenames {
-		if ret[index], err = NewFilePart(file); err != nil {
+		if ret[index], err = newFilePart(file); err != nil {
 			return
 		}
 	}
 	return
 }
-func NewFilePart(fullPathFilename string) (ret FilePart, err error) {
+func newFilePart(fullPathFilename string) (ret FilePart, err error) {
 	fh, openErr := os.Open(fullPathFilename)
 	if openErr != nil {
 		glog.V(0).Info("Failed to open file: ", fullPathFilename)
@@ -76,6 +78,7 @@ func NewFilePart(fullPathFilename string) (ret FilePart, err error) {
 		return ret, fiErr
 	} else {
 		ret.ModTime = fi.ModTime().UTC().Unix()
+		ret.FileSize = fi.Size()
 	}
 	ext := strings.ToLower(path.Ext(fullPathFilename))
 	ret.IsGzipped = ext == ".gz"
@@ -90,7 +93,7 @@ func NewFilePart(fullPathFilename string) (ret FilePart, err error) {
 	return ret, nil
 }
 
-func (fi FilePart) Upload(server string, fid string) (int, error) {
+func (fi FilePart) upload(server string, fid string, maxMB int, master, replication string) (retSize int, err error) {
 	fileUrl := "http://" + server + "/" + fid
 	if fi.ModTime != 0 {
 		fileUrl += "?ts=" + strconv.Itoa(int(fi.ModTime))
@@ -98,9 +101,47 @@ func (fi FilePart) Upload(server string, fid string) (int, error) {
 	if closer, ok := fi.Reader.(io.Closer); ok {
 		defer closer.Close()
 	}
-	ret, e := Upload(fileUrl, fi.FileName, fi.Reader, fi.IsGzipped, fi.MimeType)
-	if e != nil {
-		return 0, e
+	if maxMB > 0 && fi.FileSize > int64(maxMB*1024*1024) {
+		chunkSize := int64(maxMB * 1024 * 1024)
+		chunks := fi.FileSize/chunkSize + 1
+		fids := make([]string, 0)
+		for i := int64(0); i < chunks; i++ {
+			id, count, e := upload_one_chunk(fi.FileName+"-"+strconv.FormatInt(i+1, 10), io.LimitReader(fi.Reader, chunkSize), master, replication)
+			if e != nil {
+				return 0, e
+			}
+			fids = append(fids, id)
+			retSize += count
+			if e = upload_file_id_list(fileUrl, fi.FileName+"-list", fids); e != nil {
+				return 0, e
+			}
+		}
+		return retSize, nil
+	} else {
+		ret, e := Upload(fileUrl, fi.FileName, fi.Reader, fi.IsGzipped, fi.MimeType)
+		if e != nil {
+			return 0, e
+		}
+		return ret.Size, e
 	}
-	return ret.Size, e
+	return 0, nil
+}
+
+func upload_one_chunk(filename string, reader io.Reader, master, replication string) (fid string, size int, e error) {
+	ret, err := Assign(master, 1, replication)
+	if err != nil {
+		return "", 0, err
+	}
+	fileUrl, fid := "http://"+ret.PublicUrl+"/"+ret.Fid, ret.Fid
+	glog.V(4).Info("Uploading part ", filename, " to ", fileUrl, "...")
+	uploadResult, uploadError := Upload(fileUrl, filename, reader, false, "application/octet-stream")
+	return fid, uploadResult.Size, uploadError
+}
+
+func upload_file_id_list(fileUrl, filename string, fids []string) error {
+	var buf bytes.Buffer
+	buf.WriteString(strings.Join(fids, "\n"))
+	glog.V(4).Info("Uploading final list ", filename, " to ", fileUrl, "...")
+	_, e := Upload(fileUrl, filename, &buf, false, "text/plain")
+	return e
 }