fix: guard Dashscope response attribute access in token/log utils (#12082)

### What problem does this PR solve?

Guard Dashscope response attribute access in token/log utils, since
`dashscope_response` returns dict like object.

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

common/log_utils.py

@@ -75,9 +75,12 @@ def init_root_logger(logfile_basename: str, log_format: str = "%(asctime)-15s %(
 def log_exception(e, *args):
     logging.exception(e)
     for a in args:
-        if hasattr(a, "text"):
-            logging.error(a.text)
-            raise Exception(a.text)
-        else:
-            logging.error(str(a))
+        try:
+            text = getattr(a, "text")
+        except Exception:
+            text = None
+        if text is not None:
+            logging.error(text)
+            raise Exception(text)
+        logging.error(str(a))
     raise e

common/token_utils.py

@@ -44,23 +44,23 @@ def total_token_count_from_response(resp):
     if resp is None:
         return 0
 
-    if hasattr(resp, "usage") and hasattr(resp.usage, "total_tokens"):
-        try:
+    try:
+        if hasattr(resp, "usage") and hasattr(resp.usage, "total_tokens"):
             return resp.usage.total_tokens
-        except Exception:
-            pass
+    except Exception:
+        pass
 
-    if hasattr(resp, "usage_metadata") and hasattr(resp.usage_metadata, "total_tokens"):
-        try:
+    try:
+        if hasattr(resp, "usage_metadata") and hasattr(resp.usage_metadata, "total_tokens"):
             return resp.usage_metadata.total_tokens
-        except Exception:
-            pass
+    except Exception:
+        pass
 
-    if hasattr(resp, "meta") and hasattr(resp.meta, "billed_units") and hasattr(resp.meta.billed_units, "input_tokens"):
-        try:
-            return resp.meta.billed_units.input_tokens 
-        except Exception:
-            pass
+    try:
+        if hasattr(resp, "meta") and hasattr(resp.meta, "billed_units") and hasattr(resp.meta.billed_units, "input_tokens"):
+            return resp.meta.billed_units.input_tokens
+    except Exception:
+        pass
 
     if isinstance(resp, dict) and 'usage' in resp and 'total_tokens' in resp['usage']:
         try:
@@ -85,4 +85,3 @@ def total_token_count_from_response(resp):
 def truncate(string: str, max_len: int) -> str:
     """Returns truncated text if the length of text exceed max_len."""
     return encoder.decode(encoder.encode(string)[:max_len])
-