如何在Node js上正确设置responseType？

Question

我使用Angular Universal（节点表示为SSR）。

我正在使用responseType：“ blob”设置请求选项。只是角度response.body是blob，但是当我在服务器端（SSR）使用相同的请求时，request.body是json。

由于我们使用代码生成器来处理请求，因此无法单独解析每种类型，但是我可以为所有请求设置任何标头或选项。

namespace Sample
{
    class SampleApp
    {
        private IOContext context;

        public SampleApp()
        {
            this.context = new JSONFileContext(); //or any of the other implementations
        }

        public void doSomething()
        {
            //This app can now use the context, completely agnostic of the actual implementation details.
            object data = context.LoadData();
            //manipulate data
            context.SaveData(data);
        }
    }

    interface IOContext
    {
        void SaveData(object data);
        object LoadData();
    }

    class FileContext : IOContext
    {
        public object LoadData()
        {

            object data = null;
            var fileContents = loadFileContents();
            //Logic to turn fileContents into a data object
            return data;
        }

        public void SaveData(object data)
        {
            //logic to create filecontents from 'data'
            writeFileContents(string.Empty);
        }

        protected void writeFileContents(string fileContents)
        {
            //writes the fileContents to disk
        }

        protected string loadFileContents()
        {
            string fileContents = string.Empty;
            //loads the fileContents and returns it as a string
            return fileContents;
        }
    }

    class JSONFileContext : FileContext
    {
        public new void SaveData(object data)
        {
            //logic to create filecontents from 'data'
            base.writeFileContents(string.Empty);
        }

        public new object LoadData()
        {
            object data = null;
            var fileContents = loadFileContents();
            //Logic to turn fileContents into a data object
            return data;
        }
    }

    class SQLiteContext : IOContext
    {
        public object LoadData()
        {
            object data = null;
            //logic to read data into the data object
            return data;
        }

        public void SaveData(object data)
        {
            //logic to save the data object in the database
        }
    }
}

如何将所有响应类型设置为blob？