[Building Sakai] Accessing HTTP Attributes in Sakai

[Mark J. Norton]

Thanks, Chuck.  This is interesting information.  I did find a similar 
technique to get the Tomcat SessionContext via ThreadLocalManager, but I 
wasn't aware that the HttpRequest was kept there as well.  Fortunately, 
the situation I am dealing with has a fall back if the HttpRequest is 
not there or is invalid.

- Mark

On 12/26/2013 10:08 PM, Charles Severance wrote:
> Mark,
>
> I don't know if this helps, but I found myself stuck inside of Portlet 
> code unable to get a GET parameter in the Servlet request.  The 
> Portlet API works very hard to *not* give you access to the real 
> underlyingServlet request - but inside of Sakai, I made this work:
>
> ./basiclti-portlet/src/java/org/sakaiproject/portlets/IMSBLTIPortlet.java
>
> ...
> import javax.servlet.ServletRequest;
> import org.sakaiproject.thread_local.cover.ThreadLocalManager;
> ...
>     public final static String CURRENT_HTTP_REQUEST = 
> "org.sakaiproject.util.RequestFilter.http_request";
> ...
>             // Grab that underlying request to get a GET parameter
>             ServletRequest req = (ServletRequest) 
> ThreadLocalManager.get(CURRENT_HTTP_REQUEST);
>             String popupDone = req.getParameter("sakai.popup");
>
> Your mileage may vary - within Portlet UI View method so I knew 
> exactly where in the request lifecycle I would always be.  In library 
> code It might not be so clear where you are at in the request / 
> response cycle...  One call from a tool might work and a call from 
> Quartz will blow up with an NPE.   Caveat emptor.
>
> Good luck.
>
> /Chuck
>
>
> On Dec 26, 2013, at 9:08 AM, Mark J. Norton <markjnorton at earthlink.net 
> <mailto:markjnorton at earthlink.net>> wrote:
>
>> Following up on this, can someone confirm that the Sakai 
>> ContextSession object provides access to the current HTTP 
>> attributes?  
>> Thedocumentation<https://source.sakaiproject.org/svn/kernel/trunk/api/src/main/java/org/sakaiproject/tool/api/ContextSession.java>is 
>> a bit sparse.  ContextSession.getAttribute() has the comment:
>>      Returns the object bound with the specified name in this session, or <code>null</code> if no object is bound under the name.
>> I just need to be sure that the "session" here is the HTTP session, 
>> rather than the Sakai session.
>>
>> - Mark
>

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