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Posted to user@struts.apache.org by "Yee, Richard K,,DMDCWEST" <Ye...@osd.pentagon.mil> on 2003/12/09 01:38:35 UTC

RE: Please Help! Unable to Pass A Hidden Field To scaffold.Proces sAction

Caroline,
Imposible? Look at the HTML that is generated by the JSP page. I think you
will see that it returns "null".
Take a look at the JavaDoc for HttpServletRequest.getRemoteUser();

getRemoteUser
public java.lang.String getRemoteUser()
Returns the login of the user making this request, if the user has been
authenticated, or null if the user has not been authenticated. Whether the
user name is sent with each subsequent request depends on the browser and
type of authentication. Same as the value of the CGI variable REMOTE_USER.

Returns: a String specifying the login of the user making this request, or
null 

As the JavaDoc says: "Whether the user name is sent with each subsequent
request depends on the browser and type of authentication."  Are you using
basic authentication or are you authenticating the user yourself?
If you are doing it yourself (ie. through a db lookup) then the server
doesn't know about the user being authenticated and will return null.

Regards,

Richard
-----Original Message-----
From: Caroline Jen [mailto:jiapei_jen@yahoo.com] 
Sent: Monday, December 08, 2003 2:56 PM
To: Struts Users Mailing List
Subject: RE: Please Help! Unable to Pass A Hidden Field To scaffold.Proces
sAction


I pass two hidden fields: username and keyName at the
same time.  The keyName is passed and with the correct
value in it.  The username is passed but its value
turns out to be a null.

It is impossible for request.getRemoteUser(); in my
JSP returning a null.  (see code below) Before it
reaches request.getRemoteUser(); the user has already
been successfully logged in with a valid name.

<req:isUserInRole role="editor">
<html:form action="/find/Category">
<TR>
<TD class="option">
<% String username = request.getRemoteUser();%>
<html:hidden property="keyName"
value="journal_category"/>
<html:hidden property="username"
value="<%=username%>"/>
<html:submit>View Articles</html:submit>
</TD>
</TR>
</html:form>
</req:isUserInRole>
--- "Yee, Richard K,,DMDCWEST"
<Ye...@osd.pentagon.mil> wrote:
> Caroline,
> Are you having problems with the username or the
> keyName hidden variable? If
> it is the username, then I'd suspect that
> request.getRemoteUser() in your
> JSP is returning null.
> 
> Regards,
> 
> Richard
> 
> -----Original Message-----
> From: Caroline Jen [mailto:jiapei_jen@yahoo.com]
> Sent: Monday, December 08, 2003 1:32 PM
> To: Struts Users Mailing List
> Subject: Re: Please Help! Unable to Pass A Hidden
> Field To
> scaffold.ProcessAction
> 
> 
> I did not mess up lowercase and uppercase of the
> hidden field I want to pass from my JSP to the scaffold.ProcessAction.  
> If it had been the lowercase/uppercase problem, I would
> have gotten a message
> saying that the variable could not be recognized.  
> 
> I pass two hidden fields at the same time.  One of
> them is successfully passed with correct value.  The
> other is passed but its value shows a 'null' in the 
> scaffold.ProcessAction. What could go wrong?  Let me show my code 
> again:
> 
> Two hidden fields: username and keyName are passed
> from a JSP via a SUBMIT button:
> 
> <req:isUserInRole role="editor">
> <html:form action="/find/Category">
> <% String username = request.getRemoteUser();%>
> <html:hidden property="keyName"
> value="journal_category"/>
> <html:hidden property="username"
> value="<%=username%>"/>
> <html:submit>View Articles</html:submit>
> </html:form>
> </req:isUserInRole>
> 
> and an action mapping:
> 
>     <action
>         roles="editor"
>         path="/find/Category"
>        
> type="org.apache.struts.scaffold.ProcessAction"
>        
>
parameter="org.apache.artimus.article.FindEditorData"
>         name="articleForm"
>         scope="request"
>         validate="false">
>        <forward
>             name="success"
>             path=".article.Result"/>
>     </action>
> 
> The value of the 'username' is found to be a 'null'
> in
> the FindEditorData.java while the value of keyName
> is successfully
> retrieved.  In the browser, I got:
> 
> name=null; kn=journal_category; kv=null
> 
> The code of my FindEditorData is shown below:
> 
> public final class FindEditorData extends Bean
> {
>    public Object execute() throws Exception
>    {
> 
>    // Obtain username 
>    String username = getUsername();
>       
>    EditorService service = new EditorService();
>    String value = service.findEditorData( username
> );
> 
>    String property = getKeyName();
>         
>         if (( null==property ) || ( null==value )) 
>         {
>             StringBuffer sb = new StringBuffer();
>             sb.append( "name=" );
>             sb.append( username );
>             sb.append( "; kn=" );
>             sb.append( property );
>             sb.append( "; kv=" );
>             sb.append( value );
>             throw new ParameterException(
> sb.toString() );
>         }
> 
>         ResultList list = new ResultListBase
>         (
> 
>             Access.findByProperty(
> this,property,value
> )
> 
>         );
>         list.setLegend( property,value );
> 
>         return new ProcessResultBase( list );
> 
>    } // end execute
> 
> } // End FindEditorData
>   
> 
> 
> --- Caroline Jen <ji...@yahoo.com> wrote:
> > I want to pass two hidden fields; username and
> > keyName
> > from a JSP via a SUBMIT button:
> > 
> > <req:isUserInRole role="editor">
> > <html:form action="/find/Category">
> > <% String username = request.getRemoteUser();%> <html:hidden 
> > property="keyName" value="journal_category"/>
> > <html:hidden property="username"
> > value="<%=username%>"/>
> > <html:submit>View Articles</html:submit>
> > </html:form>
> > </req:isUserInRole>
> > 
> > and an action mapping:
> > 
> >     <action
> >         roles="editor"
> >         path="/find/Category"
> >        
> > type="org.apache.struts.scaffold.ProcessAction"
> >        
> >
>
parameter="org.apache.artimus.article.FindEditorData"
> >         name="articleForm"
> >         scope="request"
> >         validate="false">
> >        <forward
> >             name="success"
> >             path=".article.Result"/>
> >     </action>
> > 
> > How come the username is not passed to the
> FindEditorData.java while
> > the keyName is successfully
> > passed.  In the browser, I got:
> > 
> > name=null; kn=journal_category; kv=null
> > 
> > The code of my FindEditorData is shown below:
> > 
> > public final class FindEditorData extends Bean
> > {
> >    public Object execute() throws Exception
> >    {
> > 
> >    // Obtain username 
> >    String username = getUsername();
> >       
> >    EditorService service = new EditorService();
> >    String value = service.findEditorData( username
> > );
> > 
> >    String property = getKeyName();
> >         
> >         if (( null==property ) || ( null==value ))
> 
> >         {
> >             StringBuffer sb = new StringBuffer();
> >             sb.append( "name=" );
> >             sb.append( username );
> >             sb.append( "; kn=" );
> >             sb.append( property );
> >             sb.append( "; kv=" );
> >             sb.append( value );
> >             throw new ParameterException(
> > sb.toString() );
> >         }
> > 
> >         ResultList list = new ResultListBase
> >         (
> > 
> >             Access.findByProperty(
> > this,property,value
> > )
> > 
> >         );
> >         list.setLegend( property,value );
> > 
> >         return new ProcessResultBase( list );
> 
=== message truncated ===


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