Spring security：提交响应后无法调用 sendRedirect() [重复]

Question

我正在使用以下代码进行注销：

public class LogoutHandler extends SimpleUrlLogoutSuccessHandler {


@Override
public void onLogoutSuccess(HttpServletRequest request, HttpServletResponse response, Authentication authentication)
        throws IOException, ServletException {
    if(!response.isCommitted()) {
        String targetURL = "myUrl";
        response.setContentType(MediaType.TEXT_PLAIN_VALUE);
        response.getWriter().write(target);
        response.getWriter().flush();
        response.getWriter().close();
        getRedirectStrategy().sendRedirect(request, response, targetURL);
    }

 }

}

但在调用 /logout WS 时出现以下异常：

 java.lang.IllegalStateException: Cannot call sendRedirect() after the response has been committed
at org.apache.catalina.connector.ResponseFacade.sendRedirect(ResponseFacade.java:494)
at javax.servlet.http.HttpServletResponseWrapper.sendRedirect(HttpServletResponseWrapper.java:138)
at org.springframework.security.web.firewall.FirewalledResponse.sendRedirect(FirewalledResponse.java:26)
at javax.servlet.http.HttpServletResponseWrapper.sendRedirect(HttpServletResponseWrapper.java:138)

Answer 1

不，你不能在写完正文后使用sendRedirect，因为这样就会“提交”响应。

如果您想使用自定义正文进行重定向，您可以设置相当于在编写响应正文之前执行重定向：

response.setStatus(HttpServletResponse.SC_TEMPORARY_REDIRECT);
response.setHeader("Location", targetURL);