在Websphere Portal 7 Client Side Aggregation下運行Spring MVC3 Portlets

本文總結了在在Websphere Portal 7 Client Side Aggregation下運行Spring MVC3 Portlets時出現“Action ID missing”錯誤的原因和解決方法。

以下是一個簡單的Spring MVC3 Portlet，當提交表單時， Portlet顯示"This portlet is unavailable"錯誤，ffdc日誌報告Action ID missing錯誤。

<%@page
    language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1" session="false"%>
    
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>   
<%@taglib prefix="spring" uri="http://www.springframework.org/tags"%> 
<%@taglib prefix="form" uri="http://www.springframework.org/tags/form"%>
<%@taglib prefix="portlet" uri="http://java.sun.com/portlet_2_0"%>

Hello ${demoBean.message}

<portlet:actionURL var="actionURL"/>
<div>

<form:form action="${actionURL}"  method="post" modelAttribute="demoBean">
	<form:input size="20" path="message" />
	<input type="submit"/>
</form:form>  

</div>

[30/05/12 16:53:06:418 EST] 0000004e PortletInvoke W com.ibm.wps.wsrp.producer.provider.pc.waspc.impl.PortletInvokerImpl 
	newBlockingInteractionResponse Action execution refused due to a security violation. Action ID missing.
[30/05/12 16:53:06:425 EST] 0000004e WSRPEngine    E com.ibm.wps.wsrp.producer.impl.WSRPEngine performBlockInteraction 
	EJPWC1109E: Normal execution of the operation failed.
 com.ibm.wps.wsrp.exception.WSRPException: EJPWC1109E: Normal execution of the operation failed.
 at com.ibm.wps.wsrp.producer.provider.pc.waspc.impl.PortletInvokerImpl.handleActionProtection(PortletInvokerImpl.java:1083)
 at com.ibm.wps.wsrp.producer.provider.pc.waspc.impl.PortletInvokerImpl.invokePerformBlockingInteraction(PortletInvokerImpl.java:833)
 at com.ibm.wps.wsrp.producer.provider.pc.impl.PortletInvokerImpl.invokePerformBlockingInteraction(PortletInvokerImpl.java:170)
 at com.ibm.wps.wsrp.producer.impl.WSRPEngine.performBlockingInteraction(WSRPEngine.java:833)
 at oasis.names.tc.wsrp.v2.bind.WSRP_v2_Markup_Binding_SOAPImpl.performBlockingInteraction(WSRP_v2_Markup_Binding_SOAPImpl.java:213)
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
 at java.lang.reflect.Method.invoke(Method.java:597)
 at com.ibm.ws.webservices.engine.dispatchers.java.JavaDispatcher.invokeMethod(JavaDispatcher.java:178)
 at com.ibm.ws.webservices.engine.dispatchers.java.JavaDispatcher.invokeOperation(JavaDispatcher.java:141)
 at com.ibm.ws.webservices.engine.dispatchers.SoapRPCProcessor.processRequestResponse(SoapRPCProcessor.java:481)
 at com.ibm.ws.webservices.engine.dispatchers.SoapRPCProcessor.processMessage(SoapRPCProcessor.java:427)
 at com.ibm.ws.webservices.engine.dispatchers.BasicDispatcher.processMessage(BasicDispatcher.java:134)
 at com.ibm.ws.webservices.engine.dispatchers.java.SessionDispatcher.invoke(SessionDispatcher.java:204)
 at com.ibm.ws.webservices.engine.PivotHandlerWrapper.invoke(PivotHandlerWrapper.java:263)
 at com.ibm.ws.webservices.engine.handlers.jaxrpc.JAXRPCHandler.invoke(JAXRPCHandler.java:153)
 at com.ibm.ws.webservices.engine.handlers.WrappedHandler.invoke(WrappedHandler.java:64)
 at com.ibm.ws.webservices.engine.PivotHandlerWrapper.invoke(PivotHandlerWrapper.java:263)
 at com.ibm.ws.webservices.engine.PivotHandlerWrapper.invoke(PivotHandlerWrapper.java:263)

查看portlet頁面的html源代碼， 該表單的action屬性是一個Websphere Portal javascript調用， 該調用使用經過編碼的portlet action URL來實現表單的提交。

<form method="post" action="javascript:
    com.ibm.portal.csa.PortletIWidget.Z7_EIH60VH40GNPF0ITR3BKO410I2.onActionLink(
      com.ibm.portal.csa.PortletIWidget.Z7_EIH60VH40GNPF0ITR3BKO410I2.urls.url0.tokens);" 
  id="demoBean">
	<input type="text" size="20" value="" name="message" id="message">
	<input type="submit">
</form>

該錯誤的解決方法是將spring form的htmlEscape屬性設置爲false，這樣portal引擎就可以對action URL進行正確的編碼。

<form:form action="${actionURL}"  method="post" modelAttribute="demoBean"
	htmlEscape="false">
  ...			
</form:form>

上述解決方法的驗證環境爲Websphere Portal 7.0.0.2， WAS Application Server 7.0.0.21和Spring MVC 3.1.0。