java - 在 WebSphere 上，ExternalContext 的 Request 对象上的 getQueryString 返回 null

Question

我在 WebSphere 上使用 JSF 1.1 (MyFaces 1.1.8) 时遇到问题。在 Tomcat 5.5 上部署我的应用程序时，此行为不适用，一切正常。

当我尝试从 Ogone(支付网关)发回的 URL 读取参数并再次加入我的 JSF session ( session 仍然存在)时，查询字符串无法通过

final HttpServletRequest request = (HttpServletRequest)FacesContext
.getCurrentInstance().getExternalContext().getRequest();

String qs = request.getQueryString(); // null on WebSphere, filled on Tomcat

为了更完整一点，查询字符串看起来像这样:

http://100.100.100.100:9080/my_app_context/pages/screen7.jsf?orderID=4208013442596271&currency=EUR&amount=60&PM=iDEAL&ACCEPTANCE=0000000000&STATUS=9&CARDNO=11-XXXX-11&ED=&CN=K%C3%A9m+Birdy&TRXDATE=08%2F06%2F12&PAYID=15879916&NCERROR=0&BRAND=iDEAL&COMPLUS=personID%3D01%26subscriptionID%3D02&IP=100.100.100.100&SHASIGN=9642468EE016BD49787B62EA7231124B3C24F9BBFC5B3B3B4D9E97D678979E57E5EED9B47D611441A6FCA2EB1D2DB87348C8111ACFF366A4E244106CCCFAFDA5

我正在考虑一些 WebSphere Web 容器设置，这些设置可能会阻止容器正确处理外部请求。或者这里可能存在一些类加载问题，但我无法找到它。

WebSphere 上的堆栈跟踪如下所示:

12-08-07 08:02:26 ERROR - 
java.lang.NullPointerException
at ... own code trying to getQueryString()...
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:79)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:618)
at org.apache.myfaces.el.PropertyResolverImpl.getProperty(PropertyResolverImpl.java:459)
at org.apache.myfaces.el.PropertyResolverImpl.getValue(PropertyResolverImpl.java:85)
at org.apache.myfaces.custom.security.SecurityContextPropertyResolver.getValue(SecurityContextPropertyResolver.java:101)
at org.apache.myfaces.el.ELParserHelper$MyPropertySuffix.evaluate(ELParserHelper.java:539)
at org.apache.commons.el.ComplexValue.evaluate(ComplexValue.java:145)
at org.apache.myfaces.el.ValueBindingImpl.getValue(ValueBindingImpl.java:386)
at javax.faces.component.UIOutput.getValue(UIOutput.java:118)
at org.apache.myfaces.shared_impl.renderkit.RendererUtils.getValue(RendererUtils.java:267)
at org.apache.myfaces.shared_impl.renderkit.RendererUtils.getStringValue(RendererUtils.java:226)
at org.apache.myfaces.shared_impl.renderkit.html.HtmlTextRendererBase.renderOutput(HtmlTextRendererBase.java:69)
at org.apache.myfaces.shared_impl.renderkit.html.HtmlTextRendererBase.encodeEnd(HtmlTextRendererBase.java:57)
at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:799)
at javax.faces.webapp.UIComponentTag.encodeEnd(UIComponentTag.java:678)
at javax.faces.webapp.UIComponentTag.doEndTag(UIComponentTag.java:546)
at com.ibm._jsp._aanmeldScherm7._jspx_meth_h_outputText_1(_aanmeldScherm7.java:204)
at com.ibm._jsp._aanmeldScherm7._jspx_meth_f_subview_0(_aanmeldScherm7.java:1870)
at com.ibm._jsp._aanmeldScherm7._jspService(_aanmeldScherm7.java:85)
at com.ibm.ws.jsp.runtime.HttpJspBase.service(HttpJspBase.java:88)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1213)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1154)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:118)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain._doFilter(WebAppFilterChain.java:87)
at com.ibm.ws.webcontainer.filter.WebAppFilterManager.doFilter(WebAppFilterManager.java:848)
at com.ibm.ws.webcontainer.filter.WebAppFilterManager.doFilter(WebAppFilterManager.java:691)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:654)
at com.ibm.ws.wswebcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:526)
at com.ibm.wsspi.webcontainer.servlet.GenericServletWrapper.handleRequest(GenericServletWrapper.java:122)
at com.ibm.ws.jsp.webcontainerext.AbstractJSPExtensionServletWrapper.handleRequest(AbstractJSPExtensionServletWrapper.java:248)
at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.include(WebAppRequestDispatcher.java:648)
at org.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:1042)
at org.apache.jasper.runtime.PageContextImpl.include(PageContextImpl.java:484)
at org.apache.struts.tiles.TilesUtilImpl.doInclude(TilesUtilImpl.java:99)
at org.apache.struts.tiles.TilesUtil.doInclude(TilesUtil.java:135)
at org.apache.struts.taglib.tiles.InsertTag.doInclude(InsertTag.java:760)
at org.apache.struts.taglib.tiles.InsertTag$InsertHandler.doEndTag(InsertTag.java:892)
at org.apache.struts.taglib.tiles.InsertTag.doEndTag(InsertTag.java:462)
at com.ibm._jsp._defaultLayout2._jspx_meth_tiles_insert_2(_defaultLayout2.java:392)
at com.ibm._jsp._defaultLayout2._jspx_meth_h_form_0(_defaultLayout2.java:597)
at com.ibm._jsp._defaultLayout2._jspx_meth_f_view_0(_defaultLayout2.java:715)
at com.ibm._jsp._defaultLayout2._jspService(_defaultLayout2.java:92)
at com.ibm.ws.jsp.runtime.HttpJspBase.service(HttpJspBase.java:88)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1213)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1154)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:118)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain._doFilter(WebAppFilterChain.java:87)
at com.ibm.ws.webcontainer.filter.WebAppFilterManager.doFilter(WebAppFilterManager.java:848)
at com.ibm.ws.webcontainer.filter.WebAppFilterManager.doFilter(WebAppFilterManager.java:691)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:654)
at com.ibm.ws.wswebcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:526)
at com.ibm.wsspi.webcontainer.servlet.GenericServletWrapper.handleRequest(GenericServletWrapper.java:122)
at com.ibm.ws.jsp.webcontainerext.AbstractJSPExtensionServletWrapper.handleRequest(AbstractJSPExtensionServletWrapper.java:248)
at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.forward(WebAppRequestDispatcher.java:325)
at org.apache.myfaces.context.servlet.ServletExternalContextImpl.dispatch(ServletExternalContextImpl.java:426)
at org.apache.myfaces.tomahawk.application.jsp.JspTilesViewHandlerImpl.dispatch(JspTilesViewHandlerImpl.java:236)
at org.apache.myfaces.tomahawk.application.jsp.JspTilesViewHandlerImpl.renderView(JspTilesViewHandlerImpl.java:222)
at org.ajax4jsf.framework.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:101)
at org.ajax4jsf.framework.ajax.AjaxViewHandler.renderView(AjaxViewHandler.java:221)
at org.apache.myfaces.lifecycle.RenderResponseExecutor.execute(RenderResponseExecutor.java:41)
at org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:146)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:147)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1213)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1154)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:145)
at org.ajax4jsf.framework.ajax.xmlfilter.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:75)
at org.ajax4jsf.framework.ajax.xmlfilter.BaseFilter.doFilter(BaseFilter.java:213)
at com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterInstanceWrapper.java:190)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:130)
at org.apache.myfaces.webapp.filter.ExtensionsFilter.doFilter(ExtensionsFilter.java:301)
at com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterInstanceWrapper.java:190)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:130)
at com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterInstanceWrapper.java:190)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:130)
at com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterInstanceWrapper.java:190)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:130)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain._doFilter(WebAppFilterChain.java:87)
at com.ibm.ws.webcontainer.filter.WebAppFilterManager.doFilter(WebAppFilterManager.java:848)
at com.ibm.ws.webcontainer.filter.WebAppFilterManager.doFilter(WebAppFilterManager.java:691)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:654)
at com.ibm.ws.wswebcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:526)
at com.ibm.ws.webcontainer.servlet.CacheServletWrapper.handleRequest(CacheServletWrapper.java:90)
at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:764)
at com.ibm.ws.wswebcontainer.WebContainer.handleRequest(WebContainer.java:1478)
at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:133)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:457)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewRequest(HttpInboundLink.java:515)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.processRequest(HttpInboundLink.java:300)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.ready(HttpInboundLink.java:271)
at com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.sendToDiscriminators(NewConnectionInitialReadCallback.java:214)
at com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.complete(NewConnectionInitialReadCallback.java:113)
at com.ibm.ws.tcp.channel.impl.AioReadCompletionListener.futureCompleted(AioReadCompletionListener.java:165)
at com.ibm.io.async.AbstractAsyncFuture.invokeCallback(AbstractAsyncFuture.java:217)
at com.ibm.io.async.AsyncChannelFuture.fireCompletionActions(AsyncChannelFuture.java:161)
at com.ibm.io.async.AsyncFuture.completed(AsyncFuture.java:136)
at com.ibm.io.async.ResultHandler.complete(ResultHandler.java:196)
at com.ibm.io.async.ResultHandler.runEventProcessingLoop(ResultHandler.java:751)
at com.ibm.io.async.ResultHandler$2.run(ResultHandler.java:881)
at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1560)

如果有人能指出我正确的方向，请。

WebSphere 版本是 6.1.0.43。

Answer 1

好的，这可能对其他人有用。

深入研究 WebSphere Application Server 的自定义 Web 容器属性，我发现了这个:

Make query string available to the welcome file [Fix Pack 25 or later]

Typically, when a request is initially sent to the context root of the application, the request is forwarded to a welcome file. If a query string is included in an initial request, it is not available to the welcome file if you included the request.getQueryString() attribute in the welcome file. However, the query string is available to the welcome file if you included the javax.servlet.forward.query_string attribute in the welcome file.

If you need to use the request.getQueryString() attribute, instead of the javax.servlet.forward.query_string attribute, to make the query string available to the welcome file, add the com.ibm.ws.webcontainer.provideQStringToWelcomeFile custom property to your Web container configuration and set the property to true. The default value for this property is false. Name Value com.ibm.ws.webcontainer.provideQStringToWelcomeFile true

对于 WebSphere 6.1，可以在此处找到这些自定义属性:http://pic.dhe.ibm.com/infocenter/wasinfo/v6r1/index.jsp?topic=%2Fcom.ibm.websphere.base.doc%2Finfo%2Faes%2Fae%2Frweb_custom_props.html

线索是，一旦转发请求，查询字符串本身就会从请求对象中剥离，为“内部”查询字符串留出空间。初始查询字符串仍然可用

request.getAttribute("javax.servlet.forward.query_string");

一切都有点棘手，但我们的代码现在很健壮，能够在 WebSphere 和其他 servlet 容器内运行，并且能够管理 Ogone 发送的 UTF-8 和 ISO-8859-1 编码查询字符串参数。

感谢您的聆听。