如何防止 Grails 缓存旧版本的 gsp 文件?

发布于 2024-08-03 12:37:33 字数 268 浏览 5 评论 0 原文

我正在对 /grails-app/views/index.gsp 进行修改。

当我保存文件并在 Firefox 中刷新 http://localhost:8080/index.gsp 时,我获取文件的旧版本。

有没有办法阻止 Grails 缓存和渲染旧版本的文件?

(我尝试重新启动服务器并清除 Firefox 的缓存。)

谢谢!

I am making modifications to /grails-app/views/index.gsp.

When I save the file and refresh http://localhost:8080/index.gsp in Firefox, I am getting an old version of the file.

Is there a way to prevent Grails from caching and rendering old versions of the file?

(I tried restarting the server and clearing Firefox's cache.)

Thanks!

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评论(6

随波逐流 2024-08-10 12:37:33

我们不能使用这样的过滤器吗?

class CacheFilters{

    def filters = {
        all(controller: '*', action: '*') {
            before = {
                ((HttpServletResponse) response).setHeader("Cache-Control", "no-store, no-cache, must-revalidate");
            }
            after = {

            }
            afterView = {

            }
        }
    }

}

can't we use a filter like this?

class CacheFilters{

    def filters = {
        all(controller: '*', action: '*') {
            before = {
                ((HttpServletResponse) response).setHeader("Cache-Control", "no-store, no-cache, must-revalidate");
            }
            after = {

            }
            afterView = {

            }
        }
    }

}
你是我的挚爱i 2024-08-10 12:37:33

似乎没有一个简单的方法可以做到这一点,但工作量并不大。我的解决方案对呈现 GSP 的 servlet(以及用于非 GSP 请求的控制器)进行子类化。

这是 servlet 子类:

package com.burtbeckwith;

import java.io.IOException;

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

import org.codehaus.groovy.grails.web.pages.GroovyPagesServlet;

public class CachingPageServlet extends GroovyPagesServlet {

   private static final String HEADER_PRAGMA = "Pragma";
   private static final String HEADER_EXPIRES = "Expires";
   private static final String HEADER_CACHE_CONTROL = "Cache-Control";

   @Override
   public void doPage(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
      response.setHeader(HEADER_PRAGMA, "no-cache");
      response.setDateHeader(HEADER_EXPIRES, 1L);
      response.setHeader(HEADER_CACHE_CONTROL, "no-cache");
      response.addHeader(HEADER_CACHE_CONTROL, "no-store");
      super.doPage(request, response);
   }
}

您需要替换 web.xml 中的原始文件(运行“grails install-templates”并编辑 src/templates/war/web.xml):

<servlet>
   <servlet-name>gsp</servlet-name>
   <servlet-class>com.burtbeckwith.CachingPageServlet</servlet-class>
</servlet>

并且您可能也想做同样的事情对于基于控制器的响应,因此要使用此控制器子类:

package com.burtbeckwith;

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

import org.codehaus.groovy.grails.web.servlet.mvc.SimpleGrailsController;
import org.springframework.web.servlet.ModelAndView;

public class CachingSimpleGrailsController extends SimpleGrailsController {

   private static final String HEADER_PRAGMA = "Pragma";
   private static final String HEADER_EXPIRES = "Expires";
   private static final String HEADER_CACHE_CONTROL = "Cache-Control";

   @Override
   public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response) throws Exception {
      response.setHeader(HEADER_PRAGMA, "no-cache");
      response.setDateHeader(HEADER_EXPIRES, 1L);
      response.setHeader(HEADER_CACHE_CONTROL, "no-cache");
      response.addHeader(HEADER_CACHE_CONTROL, "no-store");
      return super.handleRequest(request, response);
   }
}

并且您需要在 grails-app/conf/spring/resources.groovy 中注册它以覆盖常规 Spring bean:

mainSimpleController(com.burtbeckwith.CachingSimpleGrailsController) {
   grailsApplication = ref('grailsApplication', true)
}

共享标头设置代码可能应该被提取到实用程序类中,而不是像我在这里那样复制/粘贴。

There doesn't seem to be a simple way to do this, but it's not much work. My solution subclasses the servlet that renders GSPs (and also the controller that's used for non-GSP requests).

Here's the servlet subclass:

package com.burtbeckwith;

import java.io.IOException;

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

import org.codehaus.groovy.grails.web.pages.GroovyPagesServlet;

public class CachingPageServlet extends GroovyPagesServlet {

   private static final String HEADER_PRAGMA = "Pragma";
   private static final String HEADER_EXPIRES = "Expires";
   private static final String HEADER_CACHE_CONTROL = "Cache-Control";

   @Override
   public void doPage(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
      response.setHeader(HEADER_PRAGMA, "no-cache");
      response.setDateHeader(HEADER_EXPIRES, 1L);
      response.setHeader(HEADER_CACHE_CONTROL, "no-cache");
      response.addHeader(HEADER_CACHE_CONTROL, "no-store");
      super.doPage(request, response);
   }
}

and you'll need to replace the original in web.xml (run "grails install-templates" and edit src/templates/war/web.xml):

<servlet>
   <servlet-name>gsp</servlet-name>
   <servlet-class>com.burtbeckwith.CachingPageServlet</servlet-class>
</servlet>

and you'll probably also want to do the same for Controller-based responses, so to do that use this controller subclass:

package com.burtbeckwith;

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

import org.codehaus.groovy.grails.web.servlet.mvc.SimpleGrailsController;
import org.springframework.web.servlet.ModelAndView;

public class CachingSimpleGrailsController extends SimpleGrailsController {

   private static final String HEADER_PRAGMA = "Pragma";
   private static final String HEADER_EXPIRES = "Expires";
   private static final String HEADER_CACHE_CONTROL = "Cache-Control";

   @Override
   public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response) throws Exception {
      response.setHeader(HEADER_PRAGMA, "no-cache");
      response.setDateHeader(HEADER_EXPIRES, 1L);
      response.setHeader(HEADER_CACHE_CONTROL, "no-cache");
      response.addHeader(HEADER_CACHE_CONTROL, "no-store");
      return super.handleRequest(request, response);
   }
}

and you'll need to register it in grails-app/conf/spring/resources.groovy to override the regular Spring bean:

mainSimpleController(com.burtbeckwith.CachingSimpleGrailsController) {
   grailsApplication = ref('grailsApplication', true)
}

The shared header-setting code should probably be extracted into a utility class instead of being copy/pasted like I did here.

将军与妓 2024-08-10 12:37:33

grails 中有一个用于控制缓存行为的插件,称为 Cache Headers:
http://grails.org/plugin/cache-headers

There's a plugin for controlling cache behavior in grails called Cache Headers:
http://grails.org/plugin/cache-headers

葮薆情 2024-08-10 12:37:33

确保您正在开发模式下运行(即 grails run-app 而不是 grails test|prod run-app,测试和生产将启用页面缓存。如果您处于开发模式,请尝试在单击时按住 Shift 键火狐刷新。

Make sure you are running in dev mode (i.e., grails run-app and not grails test|prod run-app, test and production will enable caching of the pages. If you are in dev mode, try holding the shift key when click the Firefox refresh.

稳稳的幸福 2024-08-10 12:37:33

如果您只想在开发时禁用浏览器缓存,可以使用 Firefox 的 Web Developer 插件:

https://addons.mozilla.org/en-US/firefox/addon/60

安装此插件 &选择“禁用缓存”。请记住,这将禁用所有网站的缓存。

If you simply want to disable cache for your browser while development, you can use Web Developer add on for Firefox:

https://addons.mozilla.org/en-US/firefox/addon/60

Install this add on & choose "Disable cache". Remember, that will disable caching for all the websites.

彩虹直至黑白 2024-08-10 12:37:33

仅出于开发目的,请尝试按 ctrl+F5,它也会刷新页面和缓存。用于在生产中缓存内容并提高页面查找 ui-性能插件和 grails 资源插件的性能。

For just development purposes try pressing ctrl+F5, it will refresh the page and the cache too.. for caching things on production and improving performance of page lookup ui-performance plugin and resources plugins of grails.

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