无法访问Spring Security自定义过滤器中的发布数据

Question

我正在处理一个需要访问帖子数据JSON的应用程序。我的代码是

import java.io.IOException;
import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import org.springframework.web.filter.GenericFilterBean;
public class LoginFilter extends GenericFilterBean {
  @Override
  public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse,
      FilterChain filterChain) throws IOException, ServletException {
    System.out.println("filtered /login request: " +  servletRequest.getParameter("idToken"));
    filterChain.doFilter(servletRequest, servletResponse);
  }
}

我运行应用程序

$ curl -v -X POST -H "Content-Type: application/json" -d '{"idToken" : "EWRE@#$RWER@#23434W$"}' http://localhost:8080/login

我在日志上获得 null

2017-05-06 06:23:31.153  INFO 89727 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : FrameworkServlet 'dispatcherServlet': initialization completed in 2 ms
filtered /login request: null

我缺少什么？

Answer 1

您将JSON作为请求主体传递，而不如参数。尝试以这种方式阅读，

servletRequest.getReader().lines().collect(Collectors.joining(System.lineSeparator()));

但是ServletRequest.getReader((返回只能读取一次的读者。