public void parseExceptionHandler(ParseException pe, HttpServletResponse response) {
    try {
      BufferedOutputStream eOut = new BufferedOutputStream(response.getOutputStream());
      response.setHeader("Content-Description", "dods-error");
      response.setContentType("text/plain");

      String msg = pe.getMessage().replace('\"', '\'');

      DAP2Exception de2 = new DAP2Exception(opendap.dap.DAP2Exception.CANNOT_READ_FILE, msg);
      de2.print(eOut);
    } catch (Exception e) {
      System.err.println("parseExceptionHandler: " + e);
    }
  }
 public void dap2ExceptionHandler(DAP2Exception de, ReqState rs) {
   rs.getResponse().setHeader("Content-Description", "dods-error");
   rs.getResponse().setContentType("text/plain");
   try {
     de.print(rs.getResponse().getOutputStream());
   } catch (Exception e) {
     System.err.println("dap2ExceptionHandler: " + e);
   }
 }
  public void doGet(HttpServletRequest request, HttpServletResponse response) {
    log.info("doGet(): " + UsageLog.setupRequestContext(request));
    // System.out.printf("opendap doGet: req=%s%n%s%n", ServletUtil.getRequest(request),
    // ServletUtil.showRequestDetail(this, request));

    String path = null;

    ReqState rs = getRequestState(request, response);

    try {
      path = request.getPathInfo();
      log.debug("doGet path={}", path);

      if (thredds.servlet.Debug.isSet("showRequestDetail"))
        log.debug(ServletUtil.showRequestDetail(this, request));

      if (path == null) {
        log.info(
            "doGet(): "
                + UsageLog.closingMessageForRequestContext(HttpServletResponse.SC_NOT_FOUND, -1));
        response.sendError(HttpServletResponse.SC_NOT_FOUND);
        return;
      }

      if (baseURI == null) { // first time, set baseURI
        URI reqURI = ServletUtil.getRequestURI(request);
        // Build base URI from request (rather than hard-coding "/thredds/dodsC/").
        String baseUriString = request.getContextPath() + request.getServletPath() + "/";
        baseURI = reqURI.resolve(baseUriString);
        log.debug("doGet(): baseURI was set = {}", baseURI);
      }

      if (path.endsWith("latest.xml")) {
        DataRootHandler.getInstance().processReqForLatestDataset(this, request, response);
        return;
      }

      // Redirect all catalog requests at the root level.
      if (path.equals("/") || path.equals("/catalog.html") || path.equals("/catalog.xml")) {
        ServletUtil.sendPermanentRedirect(ServletUtil.getContextPath() + path, request, response);
        return;
      }

      // Make sure catalog requests match a dataRoot before trying to handle.
      if (path.endsWith("/") || path.endsWith("/catalog.html") || path.endsWith("/catalog.xml")) {
        if (!DataRootHandler.getInstance().hasDataRootMatch(path)) {
          log.info(
              "doGet(): "
                  + UsageLog.closingMessageForRequestContext(HttpServletResponse.SC_NOT_FOUND, -1));
          response.sendError(HttpServletResponse.SC_NOT_FOUND);
          return;
        }

        if (!DataRootHandler.getInstance().processReqForCatalog(request, response))
          log.error(
              "doGet(): "
                  + UsageLog.closingMessageForRequestContext(
                      ServletUtil.STATUS_FORWARD_FAILURE, -1));

        return;
      }

      if (rs != null) {
        String dataSet = rs.getDataSet();
        String requestSuffix = rs.getRequestSuffix();

        if ((dataSet == null) || dataSet.equals("/") || dataSet.equals("")) {
          doGetDIR(rs);
        } else if (requestSuffix.equalsIgnoreCase("blob")) {
          doGetBLOB(rs);
        } else if (requestSuffix.equalsIgnoreCase("close")) {
          doClose(rs);
        } else if (requestSuffix.equalsIgnoreCase("dds")) {
          doGetDDS(rs);
        } else if (requestSuffix.equalsIgnoreCase("das")) {
          doGetDAS(rs);
        } else if (requestSuffix.equalsIgnoreCase("ddx")) {
          doGetDDX(rs);
        } else if (requestSuffix.equalsIgnoreCase("dods")) {
          doGetDAP2Data(rs);
        } else if (requestSuffix.equalsIgnoreCase("asc")
            || requestSuffix.equalsIgnoreCase("ascii")) {
          doGetASC(rs);
        } else if (requestSuffix.equalsIgnoreCase("info")) {
          doGetINFO(rs);
        } else if (requestSuffix.equalsIgnoreCase("html")
            || requestSuffix.equalsIgnoreCase("htm")) {
          doGetHTML(rs);
        } else if (requestSuffix.equalsIgnoreCase("ver")
            || requestSuffix.equalsIgnoreCase("version")
            || dataSet.equalsIgnoreCase("/version")
            || dataSet.equalsIgnoreCase("/version/")) {
          doGetVER(rs);
        } else if (dataSet.equalsIgnoreCase("/help")
            || dataSet.equalsIgnoreCase("/help/")
            || dataSet.equalsIgnoreCase("/" + requestSuffix)
            || requestSuffix.equalsIgnoreCase("help")) {
          doGetHELP(rs);
        } else {
          sendErrorResponse(response, HttpServletResponse.SC_BAD_REQUEST, "Unrecognized request");
          return;
        }

      } else {
        sendErrorResponse(response, HttpServletResponse.SC_BAD_REQUEST, "Unrecognized request");
        return;
      }

      log.info(UsageLog.closingMessageForRequestContext(HttpServletResponse.SC_OK, -1));

      // plain ol' 404
    } catch (FileNotFoundException e) {
      sendErrorResponse(response, HttpServletResponse.SC_NOT_FOUND, e.getMessage());

      // DAP2Exception bad url
    } catch (BadURLException e) {
      log.info(UsageLog.closingMessageForRequestContext(HttpServletResponse.SC_BAD_REQUEST, -1));
      response.setStatus(HttpServletResponse.SC_BAD_REQUEST);
      dap2ExceptionHandler(e, rs);

      // all other DAP2Exception
    } catch (DAP2Exception de) {
      int status =
          (de.getErrorCode() == DAP2Exception.NO_SUCH_FILE)
              ? HttpServletResponse.SC_NOT_FOUND
              : HttpServletResponse.SC_BAD_REQUEST;
      if ((de.getErrorCode() != DAP2Exception.NO_SUCH_FILE) && (de.getErrorMessage() != null))
        log.debug(de.getErrorMessage());
      log.info(UsageLog.closingMessageForRequestContext(status, -1));
      response.setStatus(status);
      dap2ExceptionHandler(de, rs);

      // parsing, usually the CE
    } catch (ParseException pe) {
      log.info(UsageLog.closingMessageForRequestContext(HttpServletResponse.SC_BAD_REQUEST, -1));
      response.setStatus(HttpServletResponse.SC_BAD_REQUEST);
      parseExceptionHandler(pe, response);

      // 403 - request too big
    } catch (UnsupportedOperationException e) {
      sendErrorResponse(response, HttpServletResponse.SC_FORBIDDEN, e.getMessage());

    } catch (java.net.SocketException e) {
      log.info("SocketException: " + e.getMessage(), e);
      log.info(UsageLog.closingMessageForRequestContext(ServletUtil.STATUS_CLIENT_ABORT, -1));

    } catch (IOException e) {
      String eName =
          e.getClass().getName(); // dont want compile time dependency on ClientAbortException
      if (eName.equals("org.apache.catalina.connector.ClientAbortException")) {
        log.debug("ClientAbortException: " + e.getMessage());
        log.info(UsageLog.closingMessageForRequestContext(ServletUtil.STATUS_CLIENT_ABORT, -1));
        return;
      }

      log.error("path= " + path, e);
      sendErrorResponse(response, HttpServletResponse.SC_INTERNAL_SERVER_ERROR, e.getMessage());

      // everything else
    } catch (Throwable t) {
      log.error("path= " + path, t);
      t.printStackTrace();
      sendErrorResponse(response, HttpServletResponse.SC_INTERNAL_SERVER_ERROR, t.getMessage());
    }
  }