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upload.go
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upload.go
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package serverHandler
import (
"../util"
"errors"
"io"
"net/http"
"os"
"path"
"strconv"
)
func getAvailableFilename(fsPrefix, filename string) string {
if len(fsPrefix) == 0 {
fsPrefix = "/"
} else if fsPrefix[len(fsPrefix)-1] != '/' {
fsPrefix = fsPrefix + "/"
}
if _, err := os.Lstat(fsPrefix + filename); os.IsNotExist(err) {
return filename
}
filenamePrefix, filenameSuffix := util.SplitFilename(filename)
for i := 1; ; i++ {
newFilename := filenamePrefix + "-" + strconv.Itoa(i) + filenameSuffix
if _, err := os.Lstat(fsPrefix + newFilename); os.IsNotExist(err) {
return newFilename
}
}
return ""
}
func (h *handler) saveUploadFiles(requestPath string, r *http.Request) (errs []error) {
errs = []error{}
reader, err := r.MultipartReader()
if err != nil {
errs = append(errs, err)
return
}
for i := 1; ; i++ {
part, err := reader.NextPart()
if err == io.EOF {
break
}
if err != nil {
errs = append(errs, err)
continue
}
filename := part.FileName()
if len(filename) == 0 {
continue
}
fsFilename := getAvailableFilename(h.root+requestPath, filename)
if len(fsFilename) == 0 {
err := errors.New("no available filename for " + filename)
errs = append(errs, err)
continue
}
fsPath := path.Clean(h.root + requestPath + "/" + fsFilename)
go h.logUpload(filename, fsPath, r)
file, err := os.Create(fsPath)
if err != nil {
errs = append(errs, err)
continue
}
_, err = io.Copy(file, part)
if err != nil {
errs = append(errs, err)
continue
}
err = file.Close()
if err != nil {
errs = append(errs, err)
continue
}
}
return
}