easier for client to delete file

go/operation/delete_content.go

@@ -2,9 +2,24 @@ package operation
 
 import (
 	"code.google.com/p/weed-fs/go/glog"
+	"code.google.com/p/weed-fs/go/storage"
 	"net/http"
 )
 
+func DeleteFile(server string, fileId string) (error) {
+	fid, parseErr := storage.ParseFileId(fileId)
+	if parseErr != nil {
+		return parseErr
+	}
+	lookup, lookupError := Lookup(server,fid.VolumeId)
+	if lookupError != nil {
+	  return lookupError
+	}
+	if len(lookup.Locations) == 0 {
+	  return nil
+	}
+	return Delete("http://"+lookup.Locations[0].PublicUrl+"/"+fileId)
+}
 func Delete(url string) error {
 	req, err := http.NewRequest("DELETE", url, nil)
 	if err != nil {