Introduction

Former Member · ‎10-19-2013

Introduction

When using a Portal integrated Launchpad such as ESS/MSS, all navigation requests are handled by Launchpad. In the standard solution the navigation requests are passed to the portal integration API which then invokes the Application Integration implementation included in the ERP Common role. For external URLs the navigation target within the ERP Common role is the iView “Launchpad Start URL” with the ID lpd_start_url. The challenge with the standard implementation is that external URLs will be accessed inside a frame. Most web sites such as Google, Yahoo, etc. do not allow their websites to run inside a frame and even if some web sites do, they might not work properly while accessed in a frame.

Solution

To overcome the restriction, implement a replacement iView which redirects to the external URL by using Javascript, bypassing the portal completely. NetWeaver Portal 7.31 SPS08 and ERP 6.0 EHP6 SPS04 were used while implementing this solution.

Custom Portal Component

Create a new Portal Application Project in NWDS. Within the project create a new Portal Application Object. Choose Portal Component of type AbstractPortalComponent. See below for the coding of doContent().

You may be required to add servlet.jar as an External JAR into the build path, especially if you get syntax errors for HttpServletRequest.

Save, Export and Deploy to AS JAVA.

Custom iView

Select the new PRT iView (Copy) from the Portal Content Catalog under folder Portal Applications and create a new iView for it (Paste as PCD Object). Name the new iView “Launchpad Start URL”, technical ID lpd_start_url with the prefix com.sap.pct.erp.common.

Modifiying ERP Common role

Locate the standard “Launchpad Start URL” iView and remove it from the role. Add the custom iView to the role as a delta link. Now locate the standard iView and add also it as a delta link to the role, the iView will automatically be named lpd_start_url_2.

Test and verify

For any URL of type EXTERNAL, a proper redirect should now happen bypassing the portal completely. For all other types of URLs the standard iView (lpd_start_url2) will be called.

Comments

In the standard Launchpad implementation, navigation paths can’t be easily modified. The paths are contained in table APB_LPD_PATHS. SAP note 1757909 introduces customization table APB_LPD_PATHS_C which can be used to override the navigation paths. Even then having custom navigation types is challenging: at least data types and classes need to be enhanced. The approach I have taken has minimal impact on the back-end system but still a standard portal object needs to be modified which means it must be done again in case of system updates.

Source Code

Since the migration from SCN to SAP Community sent attachments into a black hole, I'm including the code for doContent( ) in the blog itself.

import java.util.Enumeration;



import javax.servlet.http.HttpServletRequest;



import com.sapportals.portal.prt.component.*;



public class Generic extends AbstractPortalComponent {

	@SuppressWarnings("unchecked")

	public void doContent(IPortalComponentRequest request, IPortalComponentResponse response) {

		HttpServletRequest servletRequest = request.getServletRequest();



		if (servletRequest != null) {

			String oldUrl = servletRequest.getRequestURL().toString();



			Enumeration<java.lang.String> parms = servletRequest.getParameterNames();



			String urlTemplate = "";

			String navMode = "";

			String reqMeth = "";

			String windowId = "";

			String relNavBase = "";

			String tarTitle = "";

			String navTarget = "";

			String currWindowId = "";

			String prevNavTarget = "";

			String parmname = "";

			String parmval = "";



			response.write("<!-- BEGIN OF REQUEST PARAMETERS -->\n");



			while (parms.hasMoreElements()) {

				parmname = (String) parms.nextElement();

				parmval = request.getParameter(parmname);



				response.write("<!-- REQUEST PARAMETER: " + parmname + " = " + parmval + "-->\n");



				if (parmname.equals("URLTemplate")) {

					urlTemplate = parmval;

				} else if (parmname.equals("NavMode")) {

					navMode = parmval;

				} else if (parmname.equals("RequestMethod")) {

					reqMeth = parmval;

				} else if (parmname.equals("windowId")) {

					windowId = parmval;

				} else if (parmname.equals("RelativeNavBase")) {

					relNavBase = parmval;

				} else if (parmname.equals("TarTitle")) {

					tarTitle = parmval;

				} else if (parmname.equals("NavigationTarget")) {

					navTarget = parmval;

				} else if (parmname.equals("CurrentWindowId")) {

					currWindowId = parmval;

				} else if (parmname.equals("PrevNavTarget")) {

					prevNavTarget = parmval;

				}

			}



			response.write("<!-- END OF REQUEST PARAMETERS -->\n");



			String newUrl = "";



			if (urlTemplate.length() > 0) {

				if (navMode.equals("1")) {

// redirect to URLTemplate only for URLs of type EXTERNAL

					newUrl = urlTemplate;

				} else {

// for other URL types redirect to standard implementation com.sap.pct.erp.common.lpd_start_url_2

					navTarget = navTarget.replace("com.sap.pct.erp.common.lpd_start_url", "com.sap.pct.erp.common.lpd_start_url_2");

					newUrl = oldUrl + "?RequestMethod=" + reqMeth + "&NavMode=" + navMode + "&URLTemplate=" + urlTemplate + "&windowId=" + windowId + "&RelativeNavBase=" + relNavBase + "&TarTitle="

							+ tarTitle + "&NavigationTarget=" + navTarget + "&CurrentWindowId=" + currWindowId + "&PrevNavTarget=" + prevNavTarget;

				}

				response.write("<script type=\"text/javascript\">\n");

//				response.write("  alert(\"Old URL was " + oldUrl + "\");\n");

//				response.write("  alert(\"Redirecting to URL " + newUrl + "\");\n");

				response.write("  document.location = '" + newUrl + "';\n");

				response.write("</script>\n");

			}

		}

	}

}

Former Member · ‎11-27-2014

Thank you Samuli this is really useful.

could you mention the list of jar files used for this? I am getting error on

import javax.servlet.http.HttpServletRequest;

I am not sure which jar file I need for this.

Kind regards,

Hanna

Former Member · ‎01-14-2015

hanna.alene, you probably need to add servlet.jar as an External JAR to the build path. That is at least what I had to do in a vanilla NWDS. In my case servlet.jar was located in the directory C:\eclipse\plugins\com.tssap.ext.libs.j2ee_1.0.0.141205104631\lib.

Former Member · ‎01-19-2015

Thank you Samuli,

I actually added that jar file which fixed my previous error but I am now getting could not retrieve portal application error message when I run it in the portal.

10:03_16/12/14_0025_482910950

[EXCEPTION]

com.sap.portal.prt.broker.PortalModuleNotFoundException: Could not retrieve portal application XXX

at com.sap.portal.prt.broker.PortalAppBroker.ensurePortalModuleIsStarted(PortalAppBroker.java:640)

at com.sap.portal.prt.broker.PortalAppBroker.getPortalModule(PortalAppBroker.java:319)

at com.sap.portal.prt.component.PortalComponentContextFactory.createPortalComponentContext(PortalComponentContextFactory.java:140)

at com.sap.portal.prt.component.PortalComponentContextFactory.getPortalComponentContext(PortalComponentContextFactory.java:82)

at com.sap.portal.prt.core.PortalRequestManager.runRequestCycle(PortalRequestManager.java:442)

at com.sapportals.portal.prt.connection.ServletConnection._handleRequest(ServletConnection.java:224)

at com.sapportals.portal.prt.connection.ServletConnection.handleRequest(ServletConnection.java:101)

at com.sap.portal.prt.dispatcher.DispatcherServlet.service(DispatcherServlet.java:132)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)

at com.sap.engine.services.servlets_jsp.server.runtime.FilterChainImpl.runServlet(FilterChainImpl.java:202)

at com.sap.engine.services.servlets_jsp.server.runtime.FilterChainImpl.doFilter(FilterChainImpl.java:103)

at com.sap.portal.http.EnrichNavRequestFilter.doFilter(EnrichNavRequestFilter.java:49)

at com.sap.engine.services.servlets_jsp.server.runtime.FilterChainImpl.doFilter(FilterChainImpl.java:79)

at com.sap.portal.prt.dispatcher.CustomHeaderFilter.doFilter(CustomHeaderFilter.java:58)

at com.sap.engine.services.servlets_jsp.server.runtime.FilterChainImpl.doFilter(FilterChainImpl.java:79)

at com.sap.portal.http.EnrichNavRequestFilter.doFilter(EnrichNavRequestFilter.java:49)

at com.sap.engine.services.servlets_jsp.server.runtime.FilterChainImpl.doFilter(FilterChainImpl.java:79)

at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.runServlet(HttpHandlerImpl.java:441)

at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.handleRequest(HttpHandlerImpl.java:210)

at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:441)

at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:430)

at com.sap.engine.services.servlets_jsp.filters.DSRWebContainerFilter.process(DSRWebContainerFilter.java:38)