Synchronized access to fetchedOauth2AccessToken

6 years ago · cb745ceaf9
parent c6de16fc80
commit cb745ceaf9
1 changed files with 6 additions and 2 deletions
--- a/src/objective-c/GRPCClient/GRPCCall.m
+++ b/src/objective-c/GRPCClient/GRPCCall.m
@ -581,8 +581,12 @@ const char *kCFStreamVarName = "grpc_cfstream";
  }

  NSMutableDictionary *headers = _requestHeaders;
-  if (_fetchedOauth2AccessToken != nil) {
-    headers[@"authorization"] = [kBearerPrefix stringByAppendingString:_fetchedOauth2AccessToken];
+  __block NSString *fetchedOauth2AccessToken;
+  @synchronized(self) {
+    fetchedOauth2AccessToken = _fetchedOauth2AccessToken;
+  }
+  if (fetchedOauth2AccessToken != nil) {
+    headers[@"authorization"] = [kBearerPrefix stringByAppendingString:fetchedOauth2AccessToken];
  } else if (_callOptions.oauth2AccessToken != nil) {
    headers[@"authorization"] =
        [kBearerPrefix stringByAppendingString:_callOptions.oauth2AccessToken];