我正在尝试编写一个可以检索请求URL的筛选器,但我不确定如何做到这一点。
这是我到目前为止所知道的:
import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import java.io.IOException;
public class MyFilter implements Filter {
public void init(FilterConfig config) throws ServletException { }
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws ServletException, IOException {
chain.doFilter(request, response);
String url = ((HttpServletRequest) request).getPathTranslated();
System.out.println("Url: " + url);
}
public void destroy() { }
}
当我在我的服务器上点击一个页面时,我看到的唯一输出是"Url: null“。
从过滤器中给定的ServletRequest对象获取请求的URL的正确方法是什么?
发布于 2010-12-09 00:11:52
这就是你要找的吗?
if (request instanceof HttpServletRequest) {
String url = ((HttpServletRequest)request).getRequestURL().toString();
String queryString = ((HttpServletRequest)request).getQueryString();
}
要重建,请执行以下操作:
System.out.println(url + "?" + queryString);
有关HttpServletRequest.getRequestURL()
和HttpServletRequest.getQueryString()
的信息。
发布于 2017-06-30 00:19:30
在another answer on this page的基础上,
public static String getCurrentUrlFromRequest(ServletRequest request)
{
if (! (request instanceof HttpServletRequest))
return null;
return getCurrentUrlFromRequest((HttpServletRequest)request);
}
public static String getCurrentUrlFromRequest(HttpServletRequest request)
{
StringBuffer requestURL = request.getRequestURL();
String queryString = request.getQueryString();
if (queryString == null)
return requestURL.toString();
return requestURL.append('?').append(queryString).toString();
}
发布于 2021-03-31 14:04:06
如果你使用Spring,你可以使用OncePerRequestFilter
或其他。
import org.springframework.web.filter.OncePerRequestFilter;
import org.springframework.stereotype.Component;
@Component
public class MyFilter extends OncePerRequestFilter {
@Override
protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain) throws ServletException, IOException {
String url = request.getRequestURL();
filterChain.doFilter(request, response);
}
}
https://stackoverflow.com/questions/4389596
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