// any time the server needs access to the dataset, it gets a "GuardedDataset" which allows us to
// add caching
// optionally, a session may be established, which allows us to reserve the dataset for that
// session.
protected GuardedDataset getDataset(ReqState preq) throws Exception {
HttpServletRequest req = preq.getRequest();
String reqPath = preq.getDataSet();
// see if the client wants sessions
boolean acceptSession = false;
String s = req.getHeader("X-Accept-Session");
if (s != null && s.equalsIgnoreCase("true") && allowSessions) acceptSession = true;
HttpSession session = null;
if (acceptSession) {
// see if theres already a session established, create one if not
session = req.getSession();
if (!session.isNew()) {
GuardedDataset gdataset = (GuardedDataset) session.getAttribute(reqPath);
if (null != gdataset) {
if (debugSession)
System.out.printf(" found gdataset %s in session %s %n", reqPath, session.getId());
if (log.isDebugEnabled())
log.debug(" found gdataset " + gdataset + " in session " + session.getId());
return gdataset;
}
}
}
NetcdfFile ncd = DatasetHandler.getNetcdfFile(req, preq.getResponse(), reqPath);
if (null == ncd) return null;
GuardedDataset gdataset = new GuardedDatasetCacheAndClone(reqPath, ncd, acceptSession);
// GuardedDataset gdataset = new GuardedDatasetImpl(reqPath, ncd, acceptSession);
if (acceptSession) {
String cookiePath = req.getRequestURI();
String suffix = "." + preq.getRequestSuffix();
if (cookiePath.endsWith(suffix)) // snip off the suffix
cookiePath = cookiePath.substring(0, cookiePath.length() - suffix.length());
session.setAttribute(reqPath, gdataset);
session.setAttribute(CookieFilter.SESSION_PATH, cookiePath);
// session.setAttribute("dataset", ncd.getLocation()); // for UsageValve
// session.setMaxInactiveInterval(30); // 30 second timeout !!
if (debugSession)
System.out.printf(
" added gdataset %s in session %s cookiePath %s %n",
reqPath, session.getId(), cookiePath);
if (log.isDebugEnabled())
log.debug(" added gdataset " + gdataset + " in session " + session.getId());
} /* else {
session = req.getSession();
session.setAttribute("dataset", ncd.getLocation()); // for UsageValve
} */
return gdataset;
}
public void doGetDIR(ReqState rs) throws Exception {
// rather dangerous here, since you can go into an infinite loop
// so we're going to insist that there's no suffix
HttpServletResponse response = rs.getResponse();
HttpServletRequest request = rs.getRequest();
if ((rs.getRequestSuffix() == null) || (rs.getRequestSuffix().length() == 0)) {
ServletUtil.forwardToCatalogServices(request, response);
return;
}
sendErrorResponse(response, 0, "Unrecognized request");
}
private void doClose(ReqState rs) throws Exception {
HttpServletResponse response = rs.getResponse();
HttpServletRequest request = rs.getRequest();
String reqPath = rs.getDataSet();
HttpSession session = request.getSession();
session.removeAttribute(reqPath); // work done in the listener
response.setHeader("XDODS-Server", getServerVersion()); // needed by client
/* if (path.endsWith(".close")) {
closeSession(request, response);
response.setContentLength(0);
log.info("doGet(): " + UsageLog.closingMessageForRequestContext(HttpServletResponse.SC_OK, 0));
return;
}
// so we need to worry about deleting sessions?
session.invalidate(); */
}
public void doGetHTML(ReqState rs) throws Exception {
HttpServletResponse response = rs.getResponse();
HttpServletRequest request = rs.getRequest();
GuardedDataset ds = null;
try {
ds = getDataset(rs);
if (ds == null) return;
response.setHeader("XDODS-Server", getServerVersion());
response.setContentType("text/html");
response.setHeader("Content-Description", "dods-form");
// Utilize the getDDS() method to get a parsed and populated DDS
// for this server.
ServerDDS myDDS = ds.getDDS();
DAS das = ds.getDAS();
GetHTMLInterfaceHandler2 di = new GetHTMLInterfaceHandler2();
di.sendDataRequestForm(request, response, rs.getDataSet(), myDDS, das);
} finally { // release lock if needed
if (ds != null) ds.release();
}
}
