コード例 #1
0
ファイル: ErrorReportValve.java プロジェクト: jorkin/openasp
  /**
   * Invoke the next Valve in the sequence. When the invoke returns, check the response state, and
   * output an error report is necessary.
   *
   * @param request The servlet request to be processed
   * @param response The servlet response to be created
   * @exception IOException if an input/output error occurs
   * @exception ServletException if a servlet error occurs
   */
  @Override
  public void invoke(Request request, Response response) throws IOException, ServletException {

    // Perform the request
    getNext().invoke(request, response);

    if (response.isCommitted()) {
      return;
    }

    Throwable throwable = (Throwable) request.getAttribute(RequestDispatcher.ERROR_EXCEPTION);

    if (request.isAsyncStarted() && response.getStatus() < 400 && throwable == null) {
      return;
    }

    if (throwable != null) {

      // The response is an error
      response.setError();

      // Reset the response (if possible)
      try {
        response.reset();
      } catch (IllegalStateException e) {
        // Ignore
      }

      response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
    }

    response.setSuspended(false);

    try {
      report(request, response, throwable);
    } catch (Throwable tt) {
      ExceptionUtils.handleThrowable(tt);
    }

    if (request.isAsyncStarted()) {
      request.getAsyncContext().complete();
    }
  }
コード例 #2
0
ファイル: ErrorReportValve.java プロジェクト: jorkin/openasp
  /**
   * Prints out an error report.
   *
   * @param request The request being processed
   * @param response The response being generated
   * @param throwable The exception that occurred (which possibly wraps a root cause exception
   */
  protected void report(Request request, Response response, Throwable throwable) {

    // Do nothing on non-HTTP responses
    int statusCode = response.getStatus();

    // Do nothing on a 1xx, 2xx and 3xx status
    // Do nothing if anything has been written already
    if (statusCode < 400 || response.getContentWritten() > 0 || !response.isError()) {
      return;
    }

    String message = RequestUtil.filter(response.getMessage());
    if (message == null) {
      if (throwable != null) {
        String exceptionMessage = throwable.getMessage();
        if (exceptionMessage != null && exceptionMessage.length() > 0) {
          message = RequestUtil.filter((new Scanner(exceptionMessage)).nextLine());
        }
      }
      if (message == null) {
        message = "";
      }
    }

    // Do nothing if there is no report for the specified status code
    String report = null;
    try {
      report = sm.getString("http." + statusCode);
    } catch (Throwable t) {
      ExceptionUtils.handleThrowable(t);
    }
    if (report == null) {
      return;
    }

    StringBuilder sb = new StringBuilder();

    sb.append("<html><head><title>");
    sb.append(ServerInfo.getServerInfo()).append(" - ");
    sb.append(sm.getString("errorReportValve.errorReport"));
    sb.append("</title>");
    sb.append("<style><!--");
    sb.append(org.apache.catalina.util.TomcatCSS.TOMCAT_CSS);
    sb.append("--></style> ");
    sb.append("</head><body>");
    sb.append("<h1>");
    sb.append(sm.getString("errorReportValve.statusHeader", "" + statusCode, message))
        .append("</h1>");
    sb.append("<HR size=\"1\" noshade=\"noshade\">");
    sb.append("<p><b>type</b> ");
    if (throwable != null) {
      sb.append(sm.getString("errorReportValve.exceptionReport"));
    } else {
      sb.append(sm.getString("errorReportValve.statusReport"));
    }
    sb.append("</p>");
    sb.append("<p><b>");
    sb.append(sm.getString("errorReportValve.message"));
    sb.append("</b> <u>");
    sb.append(message).append("</u></p>");
    sb.append("<p><b>");
    sb.append(sm.getString("errorReportValve.description"));
    sb.append("</b> <u>");
    sb.append(report);
    sb.append("</u></p>");

    if (throwable != null) {

      String stackTrace = getPartialServletStackTrace(throwable);
      sb.append("<p><b>");
      sb.append(sm.getString("errorReportValve.exception"));
      sb.append("</b> <pre>");
      sb.append(RequestUtil.filter(stackTrace));
      sb.append("</pre></p>");

      int loops = 0;
      Throwable rootCause = throwable.getCause();
      while (rootCause != null && (loops < 10)) {
        stackTrace = getPartialServletStackTrace(rootCause);
        sb.append("<p><b>");
        sb.append(sm.getString("errorReportValve.rootCause"));
        sb.append("</b> <pre>");
        sb.append(RequestUtil.filter(stackTrace));
        sb.append("</pre></p>");
        // In case root cause is somehow heavily nested
        rootCause = rootCause.getCause();
        loops++;
      }

      sb.append("<p><b>");
      sb.append(sm.getString("errorReportValve.note"));
      sb.append("</b> <u>");
      sb.append(sm.getString("errorReportValve.rootCauseInLogs", ServerInfo.getServerInfo()));
      sb.append("</u></p>");
    }

    sb.append("<HR size=\"1\" noshade=\"noshade\">");
    sb.append("<h3>").append(ServerInfo.getServerInfo()).append("</h3>");
    sb.append("</body></html>");

    try {
      try {
        response.setContentType("text/html");
        response.setCharacterEncoding("utf-8");
      } catch (Throwable t) {
        ExceptionUtils.handleThrowable(t);
        if (container.getLogger().isDebugEnabled()) {
          container.getLogger().debug("status.setContentType", t);
        }
      }
      Writer writer = response.getReporter();
      if (writer != null) {
        // If writer is null, it's an indication that the response has
        // been hard committed already, which should never happen
        writer.write(sb.toString());
      }
    } catch (IOException e) {
      // Ignore
    } catch (IllegalStateException e) {
      // Ignore
    }
  }