check file before uploading to server (#866)

visualdl/reader/reader.py

@@ -22,18 +22,28 @@
 from visualdl.utils.string_util import decode_tag, encode_tag
 
 
-def is_VDLRecord_file(path):
+def is_VDLRecord_file(path, check=False):
     """Determine whether it is a VDL log file according to the file name.
 
     File name of a VDL log file must contain `vdlrecords`.
 
     Args:
         path: File name to determine.
+        check: Check file is valid or not.
 
     Returns:
         True if the file is a VDL log file, otherwise false.
     """
-    return "vdlrecords" in path
+    if not "vdlrecords" in path:
+        return False
+    if check:
+        _reader = RecordReader(filepath=path)
+        meta_data = _reader.get_next()
+        record = record_pb2.Record()
+        record.ParseFromString(meta_data)
+        if 'meta_data_tag' != record.values[0].tag:
+            return False
+    return True
 
 
 class LogReader(object):

visualdl/server/serve.py

@@ -69,7 +69,8 @@ def get_vdl_log_file(logdirs):
 
             walks_temp = {}
             for run, tags in walks.items():
-                tags_temp = [tag for tag in tags if is_VDLRecord_file(tag)]
+                tags_temp = [tag for tag in tags if
+                             is_VDLRecord_file(path=bfile.join(run, tag), check=True)]
                 tags_temp.sort(reverse=True)
                 if len(tags_temp) > 0:
                     walks_temp.update({run: tags_temp[0]})