org.directwebremoting.impl.DefaultWebContext Maven / Gradle / Ivy
package org.directwebremoting.impl;
import java.io.IOException;
import java.io.StringWriter;
import javax.servlet.ServletConfig;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import org.directwebremoting.Container;
import org.directwebremoting.ScriptSession;
import org.directwebremoting.extend.RealScriptSession;
import org.directwebremoting.extend.RealWebContext;
import org.directwebremoting.util.SwallowingHttpServletResponse;
/**
* A default implementation of WebContext.
* @author Joe Walker [joe at getahead dot ltd dot uk]
*/
public class DefaultWebContext extends DefaultServerContext implements RealWebContext
{
/**
* Create a new DefaultWebContext
* @param container The IoC container
* @param request The incoming http request
* @param response The outgoing http reply
* @param servletConfig The servlet configuration
* @param servletContext The servlet context
* @see org.directwebremoting.WebContextFactory.WebContextBuilder#engageThread(Container, HttpServletRequest, HttpServletResponse)
*/
protected DefaultWebContext(Container container, HttpServletRequest request, HttpServletResponse response, ServletConfig servletConfig, ServletContext servletContext)
{
setServletConfig(servletConfig);
setServletContext(servletContext);
setContainer(container);
this.request = request;
this.response = response;
}
/* (non-Javadoc)
* @see org.directwebremoting.extend.RealWebContext#initialize(java.lang.String, org.directwebremoting.extend.RealScriptSession)
*/
public void initialize(final String sentPage, RealScriptSession scriptSession)
{
this.scriptSession = scriptSession;
this.page = sentPage;
}
/* (non-Javadoc)
* @see org.directwebremoting.WebContext#getCurrentPage()
*/
public String getCurrentPage()
{
if (page == null)
{
throw new UnsupportedOperationException("CurrentPage is not supported from a JSON call.");
}
return page;
}
/* (non-Javadoc)
* @see org.directwebremoting.WebContext#getScriptSession()
*/
public ScriptSession getScriptSession()
{
return scriptSession;
}
/* (non-Javadoc)
* @see org.directwebremoting.WebContext#getSession()
*/
public HttpSession getSession()
{
return request.getSession();
}
/* (non-Javadoc)
* @see org.directwebremoting.WebContext#getSession(boolean)
*/
public HttpSession getSession(boolean create)
{
return request.getSession(create);
}
/* (non-Javadoc)
* @see org.directwebremoting.WebContext#getHttpServletRequest()
*/
public HttpServletRequest getHttpServletRequest()
{
return request;
}
/* (non-Javadoc)
* @see org.directwebremoting.WebContext#getHttpServletResponse()
*/
public HttpServletResponse getHttpServletResponse()
{
return response;
}
/* (non-Javadoc)
* @see org.directwebremoting.WebContext#forwardToString(java.lang.String)
*/
public String forwardToString(String url) throws ServletException, IOException
{
StringWriter sout = new StringWriter();
StringBuffer buffer = sout.getBuffer();
HttpServletResponse realResponse = getHttpServletResponse();
HttpServletResponse fakeResponse = new SwallowingHttpServletResponse(realResponse, sout, realResponse.getCharacterEncoding());
HttpServletRequest realRequest = getHttpServletRequest();
realRequest.setAttribute(ATTRIBUTE_DWR, Boolean.TRUE);
getServletContext().getRequestDispatcher(url).include(realRequest, fakeResponse);
return buffer.toString();
}
/**
* ScriptSession IDs are too long to be useful to humans. We shorten them
* to the first 4 characters.
*/
private String simplifyId(String id)
{
if (id == null)
{
return "[null]";
}
if (id.length() == 0)
{
return "[blank]";
}
if (id.length() < 4)
{
return id;
}
return id.substring(0, 4);
}
/* (non-Javadoc)
* @see java.lang.Object#toString()
*/
@Override
public String toString()
{
return "DefaultWebContext[id=" + simplifyId(scriptSession.getId()) + ", page=" + page + "]";
}
/**
* The unique ID (like a session ID) assigned to the current page
*/
private RealScriptSession scriptSession;
/**
* The URL of the current page
*/
private String page;
/**
* The HttpServletRequest associated with the current request
*/
private final HttpServletRequest request;
/**
* The HttpServletResponse associated with the current request
*/
private final HttpServletResponse response;
}
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