过滤器未对web.xml中的欢迎页面执行

Question

I'm attempting to follow these instructions to make my GWT/App Engine app crawlable. I built a filter as described, and included the following in my web.xml:

  <filter>
     <filter-name>crawlFilterChain</filter-name>
     <filter-class>com.project.name.server.service.CrawlFilterChain</filter-class>
  </filter>


  <filter-mapping>
     <filter-name>crawlFilterChain</filter-name>
     <url-pattern>*</url-pattern>
  </filter-mapping>

  <welcome-file-list>
     <welcome-file>BaconBits.html</welcome-file>
  </welcome-file-list>

I then attempted to test the configuration by loading this URL in a browser:

http://127.0.0.1:8888/?gwt.codesvr=127.0.0.1:9997&_escaped_fragment_=page%3DEvent%26eventId%3D1138

The filter is invoked, but not for the initial "GET /" request when the page is first loaded (the one that returns the welcome file). It's only invoked for subsequent RPC/AJAX requests, none of which have a query string. Oddly, if I insert a non-existent resource after the / in the URL (such as index.html), the filter is invoked, and the appropriate HTML is returned. What am I doing wrong? The behavior is the same in production.

This looks to be the same problem described here and here , but using the same config as they recommend doesn't work. Basically, the "GET /" request that returns the welcome file doesn't invoke the filter. What am I doing wrong?

Answer 1

好的， 这篇文章是同样的问题，appengine-web.xml自我解答对我有用。