Set http_body_compress_threshold to 0 on gzip & not set content-type

example/grpc_c++/client.cpp

@@ -32,6 +32,9 @@ DEFINE_bool(gzip, false, "compress body using gzip");
 int main(int argc, char* argv[]) {
     // Parse gflags. We recommend you to use gflags as well.
     GFLAGS_NS::ParseCommandLineFlags(&argc, &argv, true);
+    if (FLAGS_gzip) {
+        GFLAGS_NS::SetCommandLineOption("http_body_compress_threshold", 0);
+    }
     
     // A Channel represents a communication line to a Server. Notice that 
     // Channel is thread-safe and can be shared by all threads in your program.
@@ -60,7 +63,6 @@ int main(int argc, char* argv[]) {
         brpc::Controller cntl;
 
         request.set_name("grpc_req_from_brpc");
-        cntl.http_request().set_content_type("application/grpc");
         if (FLAGS_gzip) {
             cntl.set_request_compress_type(brpc::COMPRESS_TYPE_GZIP);
         }