[Bug 65491] New: Behavior differences with c:import when flushing out data

[bu...@apache.org]

https://bz.apache.org/bugzilla/show_bug.cgi?id=65491

            Bug ID: 65491
           Summary: Behavior differences with c:import when flushing out
                    data
           Product: Taglibs
           Version: 1.2.5
          Hardware: PC
                OS: Mac OS X 10.1
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Standard Taglib
          Assignee: dev@tomcat.apache.org
          Reporter: volosied@apache.org
  Target Milestone: ---

Hello,

I would like some clarification on what behavior is correct here, given the
JSPs below.  There's a difference between the Tomcat/Apache Taglibs & the
Eclipse Foundation's Tag Library implementations. 


test.jsp:

<%@ page session="false" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>

<TABLE border>
    <TR>
        <TD>Hello world</TD>
        <TD><%=System.currentTimeMillis()%></TD>
    </TR>
    <tr>
        <td>The import</td>
        <td><c:import url="imported-file.jsp" var="foo"/></td>
    </tr>
    <tr>
        <td>The output</td>
        <td><c:out value="${foo}"/></td>
    </tr>
</TABLE>

imported-file.jsp:

<%@ page session="false" %>
Start of test a
<% out.flush(); %>
End of test a


Should anything be displayed when importing a file, even when an out.flush() is
called? File contents should only be stored in the variable, until is
outputted? 

I also created a sister issue here (with screenshots) --
https://github.com/eclipse-ee4j/jstl-api/issues/153 

The spec appears ambiguous on this scenario, so I hope someone here can provide
some insight?  What is the correct behavior here? 


In the Eclipse's Impl, calling out.flush within the import flushes that
straight to the page.  

Eclipse (I testing using EE9's 2.0, but it's also the similar for the 1.2.7
version):
https://github.com/eclipse-ee4j/jstl-api/blob/1.2.7/impl/src/main/java/org/apache/taglibs/standard/tag/common/core/ImportSupport.java


https://github.com/eclipse-ee4j/jstl-api/blob/1.2.7/impl/src/main/java/org/apache/taglibs/standard/tag/common/core/ImportSupport.java#L514-L521

Apache (version 1.2.5):
https://github.com/apache/tomcat-taglibs-standard/blob/taglibs-standard-1.2.5/impl/src/main/java/org/apache/taglibs/standard/tag/common/core/ImportSupport.java#L470


Thank you!

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