无法访问 App Engine 开发服务器上 servlet 过滤器中的会话数据
我试图编写一个会话过滤器来集中我的应用程序引擎网络应用程序中的授权检查。
我的过滤器看起来像这样：
@Override
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain) throws IOException, ServletException {
HttpServletRequest httpReq = (HttpServletRequest) request;
HttpServletResponse httpResp = (HttpServletResponse) request;
HttpSession session = httpReq.getSession();
httpReq.setCharacterEncoding("UTF-8");
httpResp.setCharacterEncoding("UTF-8");
httpResp.setContentType("application/json");
Boolean isAuthorized = (Boolean) session.getAttribute("isAuthorized");
if (!isAuthorized || isAuthorized == null) {
httpResp.sendError(HttpServletResponse.SC_UNAUTHORIZED);
} else {
chain.doFilter(request, response);
}
}
但是当我启动应用程序引擎开发服务器时，我遇到了这个异常：“org.mortbay.jetty.request 无法转换为 javax.servlet.http.httpservletresponse”。我做错了什么？
I was trying to write a session filter to centralize authorization check in my app engine web app.
My filter looks like this :
@Override
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain) throws IOException, ServletException {
HttpServletRequest httpReq = (HttpServletRequest) request;
HttpServletResponse httpResp = (HttpServletResponse) request;
HttpSession session = httpReq.getSession();
httpReq.setCharacterEncoding("UTF-8");
httpResp.setCharacterEncoding("UTF-8");
httpResp.setContentType("application/json");
Boolean isAuthorized = (Boolean) session.getAttribute("isAuthorized");
if (!isAuthorized || isAuthorized == null) {
httpResp.sendError(HttpServletResponse.SC_UNAUTHORIZED);
} else {
chain.doFilter(request, response);
}
}
But when I'm launching app engine dev server I'm greeted with this exception : "org.mortbay.jetty.request cannot be cast to javax.servlet.http.httpservletresponse". What am I doing wrong?
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评论（1）
您正在尝试将“请求”对象转换为响应。
更改如下
You are trying to cast "request" object as response.
change as follows