brpc之文件上传下载，非私有协议容易被侵入，建议不使用公开协议

syntax="proto2";
package example;
 
option cc_generic_services = true;
 
message FileUpLoadRequest {
    required string name = 1;
    repeated bytes chuncks = 2;
}
message FileUpLoadResponse {
    required int32 bytes = 1;
}
service FileUp {
    rpc UpLoadFile(FileUpLoadRequest) returns (FileUpLoadResponse) {}
}