package org.nutz.mvc.view;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * 重定向视图
 * <p>
 * 在入口函数上声明：
 * <p>
 * '@Ok("redirect:/pet/list.nut")'
 * <p>
 * 实际上相当于：<br>
 * new ServerRedirectView("/pet/list.nut");
 * 
 * @author zozoh(zozohtnt@gmail.com)
 */
public class ServerRedirectView extends AbstractPathView {

    public ServerRedirectView(String dest) {
        super(dest);
    }

    public void render(HttpServletRequest req, HttpServletResponse resp, Object obj)
            throws Exception {

        String path = evalPath(req, obj);

        // Another site
        if (path.startsWith("http://") || path.startsWith("https://")) {}
        // Absolute path, add the context path for it
        else if (path.length() > 0 && path.charAt(0) == '/') {
            path = req.getContextPath() + path;
        }
        resp.sendRedirect(path); // 这个原生支持相对路径的,就不要再做无用功了
        resp.flushBuffer();
    }

}