log warning if failed to read or write to local cache (#124)

* log warning if failed to read or write to local cache

* bump up version

Author: NRHelmi

CHANGELOG.md

@@ -1,5 +1,9 @@
 # Changelog
 
+## v0.6.11
+
+* Log warnings if failed to read or write to the local access token cache.
+
 ## v0.6.10
 
 * Fix for `ImportError: cannot import name 'appengine' from 'urllib3.contrib'`

railib/__init__.py

@@ -12,5 +12,5 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-__version_info__ = (0, 6, 10)
+__version_info__ = (0, 6, 11)
 __version__ = ".".join(map(str, __version_info__))

railib/rest.py

@@ -126,7 +126,8 @@ def _read_cache() -> dict:
     try:
         with open(_cache_file(), 'r') as cache:
             return json.loads(cache.read())
-    except Exception:
+    except Exception as e:
+        logger.warning(f'Failed to read token cache {_cache_file()}: {e}')
         return {}
 
 
@@ -147,8 +148,8 @@ def _write_token_cache(creds: ClientCredentials):
 
         with open(_cache_file(), 'w') as f:
             f.write(json.dumps(cache, default=vars))
-    except Exception:
-        pass
+    except Exception as e:
+        logger.warning(f'Failed to write to token cache {_cache_file()}: {e}')
 
 
 # Returns the current access token if valid, otherwise requests new token.