Portlet:转发ResourceRequest以显示完整的门户 [英] Portlet: Forward a ResourceRequest to show the full portal
问题描述
是否可以将ResourceRequest转发到呈现完整门户的请求?我也在考虑重定向,但是我希望能够传递一些属性/参数.
我希望我已经清楚地解释了我的问题.谢谢你.
相关/重复的: 我想要实现的是相同的,但是阻止了浏览器执行两个请求.为此,我想进行转发,并且应该将错误消息写为request属性. 我将带有此示例的项目上传到GitHub:
https://github.com/adrianrm/poc-forward-portlet/tree/master/src/main/java/arm/requestforward 以下是尝试使用servlet转发来实现的一种尝试,并且似乎可行.不过,我认为这是Portlet规范中不存在的功能的解决方法: 最重要的是,当发生前进时,Liferay在控制台上显示警告: my intention is to process a ResourceRequest that serves a resource (A dinamically generated PDF). If something goes wrong generating this file, the whole portal with a failure message in the portlet should be rendered. Is it possible to forward a ResourceRequest to a request that renders the complete portal? I am also considering a redirect, but I will like to be able to pass some attributes/parameters along. I hope I explained my problem clear enough. Thank you. Related/Duplicate: How to make the ResourceResponse to forward the request to error page in liferay portlet This is an example that works and does something similar to what I want to achieve. I uses the utility class What I want to achieve is the same, but preventing the browser from doing two requests. For that, I would like to do a forward and I should write the error message as a request attribute. I uploaded a project with this example to GitHub:
https://github.com/adrianrm/poc-forward-portlet/tree/master/src/main/java/arm/requestforward The following is an attempt to do it using a servlet forward, and it seems to work. Still, I think it is a workaround for a feature not present in the portlet specification: On top of that, when the forward occurs, Liferay shows a warning on the console:
这篇关于Portlet:转发ResourceRequest以显示完整的门户的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!import com.liferay.portal.kernel.servlet.SessionErrors;
import javax.portlet.GenericPortlet;
import javax.portlet.RenderRequest;
import javax.portlet.RenderResponse;
import javax.portlet.ResourceRequest;
import javax.portlet.ResourceResponse;
import javax.portlet.PortletException;
import javax.portlet.PortletException;
import javax.portlet.PortletRequestDispatcher;
public class ResourceRequestForwardPortlet extends GenericPortlet {
public void serveResource(ResourceRequest request, ResourceResponse response)
throws PortletException, IOException {
SessionErrors.add(resourceRequest, "resourcerequest.error", "ERROR " + errorText);
resourceResponse.setProperty(ResourceResponse.HTTP_STATUS_CODE, "302");
resourceResponse.addProperty("Location", resourceResponse.createRenderURL().toString());
}
public void doView(RenderRequest renderRequest, RenderResponse renderResponse)
throws IOException, PortletException {
String error = (String)SessionErrors.get(renderRequest, "resourcerequest.error");
SessionErrors.clear(renderRequest);
renderRequest.setAttribute("errorMsg", error);
PortletRequestDispatcher portletRequestDispatcher = getPortletContext().getRequestDispatcher("view.jsp");
include(viewTemplate, renderRequest, renderResponse);
portletRequestDispatcher.include(renderRequest, renderResponse);
}
}
public class ResourceRequestForwardPortlet extends GenericPortlet {
public void serveResource(ResourceRequest request, ResourceResponse response)
throws PortletException, IOException {
HttpServletRequest request = PortalUtil.getOriginalServletRequest(PortalUtil.getHttpServletRequest(portletRequest));
PortletURL renderURL = portletResponse.createRenderURL();
try {
request.setAttribute("error", errorText);
String forwardURL = renderURL.toString().replace("http://localhost:8080", "");//The generation of the forwardURL could be done nicer
RequestDispatcher rd = request.getRequestDispatcher(forwardURL);
rd.forward(request, PortalUtil.getHttpServletResponse(portletResponse));
} catch (ServletException e) {
throw new PortletException(e);
}
}
}
14:33:51,048 WARN [http-apr-8080-exec-112][code_jsp:128] {code="404", msg="/poc-forward-portlet/web/guest/home", uri=/web/guest/home}
X-Requested-With null
Example
SessionErrors
of Liferay: The serveResource()
saves an object in the session and does a redirection to a render URL. The doView()
method is called during the subsequent request and can read the contents saved in the session.import com.liferay.portal.kernel.servlet.SessionErrors;
import javax.portlet.GenericPortlet;
import javax.portlet.RenderRequest;
import javax.portlet.RenderResponse;
import javax.portlet.ResourceRequest;
import javax.portlet.ResourceResponse;
import javax.portlet.PortletException;
import javax.portlet.PortletException;
import javax.portlet.PortletRequestDispatcher;
public class ResourceRequestForwardPortlet extends GenericPortlet {
public void serveResource(ResourceRequest request, ResourceResponse response)
throws PortletException, IOException {
SessionErrors.add(resourceRequest, "resourcerequest.error", "ERROR " + errorText);
resourceResponse.setProperty(ResourceResponse.HTTP_STATUS_CODE, "302");
resourceResponse.addProperty("Location", resourceResponse.createRenderURL().toString());
}
public void doView(RenderRequest renderRequest, RenderResponse renderResponse)
throws IOException, PortletException {
String error = (String)SessionErrors.get(renderRequest, "resourcerequest.error");
SessionErrors.clear(renderRequest);
renderRequest.setAttribute("errorMsg", error);
PortletRequestDispatcher portletRequestDispatcher = getPortletContext().getRequestDispatcher("view.jsp");
include(viewTemplate, renderRequest, renderResponse);
portletRequestDispatcher.include(renderRequest, renderResponse);
}
}
public class ResourceRequestForwardPortlet extends GenericPortlet {
public void serveResource(ResourceRequest request, ResourceResponse response)
throws PortletException, IOException {
HttpServletRequest request = PortalUtil.getOriginalServletRequest(PortalUtil.getHttpServletRequest(portletRequest));
PortletURL renderURL = portletResponse.createRenderURL();
try {
request.setAttribute("error", errorText);
String forwardURL = renderURL.toString().replace("http://localhost:8080", "");//The generation of the forwardURL could be done nicer
RequestDispatcher rd = request.getRequestDispatcher(forwardURL);
rd.forward(request, PortalUtil.getHttpServletResponse(portletResponse));
} catch (ServletException e) {
throw new PortletException(e);
}
}
}
14:33:51,048 WARN [http-apr-8080-exec-112][code_jsp:128] {code="404", msg="/poc-forward-portlet/web/guest/home", uri=/web/guest/home}
X-Requested-With null