使用smiley-http-proxy-servlet访问post请求400

springboot2不存在此问题
https://stackoverflow.com/questions/8522568/why-is-httpservletrequest-inputstream-empty

https://github.com/mitre/HTTP-Proxy-Servlet/issues/83

@Bean
public FilterRegistrationBean registration(HiddenHttpMethodFilter filter) {
    FilterRegistrationBean registration = new FilterRegistrationBean(filter);
    registration.setEnabled(false);
    return registration;
}