Examples with RequestSlingFilterChain org.apache.sling.engine.impl.filter.RequestSlingFilterChain used on opensource projects

Example 1 with RequestSlingFilterChain

use of org.apache.sling.engine.impl.filter.RequestSlingFilterChain in project sling by apache.

the class SlingRequestProcessorImpl method doProcessRequest.

/**
     * This method is directly called by the Sling main servlet.
     */
public void doProcessRequest(final HttpServletRequest servletRequest, final HttpServletResponse servletResponse, final ResourceResolver resourceResolver) throws IOException {
    // setting the Sling request and response
    final RequestData requestData = new RequestData(this, servletRequest, servletResponse);
    final SlingHttpServletRequest request = requestData.getSlingRequest();
    final SlingHttpServletResponse response = requestData.getSlingResponse();
    // record the request for the web console display
    RequestHistoryConsolePlugin.recordRequest(request);
    try {
        final ServletResolver sr = this.servletResolver;
        // check that we have all required services
        if (resourceResolver == null) {
            throw new UnavailableException("ResourceResolver");
        } else if (sr == null) {
            throw new UnavailableException("ServletResolver");
        }
        // initialize the request data - resolve resource and servlet
        Resource resource = requestData.initResource(resourceResolver);
        requestData.initServlet(resource, sr);
        FilterHandle[] filters = filterManager.getFilters(FilterChainType.REQUEST);
        if (filters != null) {
            FilterChain processor = new RequestSlingFilterChain(this, filters);
            request.getRequestProgressTracker().log("Applying " + FilterChainType.REQUEST + "filters");
            processor.doFilter(request, response);
        } else {
            // no filters, directly call resource level filters and servlet
            processComponent(request, response, FilterChainType.COMPONENT);
        }
    } catch (final SlingHttpServletResponseImpl.WriterAlreadyClosedException wace) {
        log.error("Writer has already been closed.", wace);
    } catch (ResourceNotFoundException rnfe) {
        // send this exception as a 404 status
        log.info("service: Resource {} not found", rnfe.getResource());
        handleError(HttpServletResponse.SC_NOT_FOUND, rnfe.getMessage(), request, response);
    } catch (final SlingException se) {
        // we assume, that this is the name of the causing servlet
        if (requestData.getActiveServletName() != null) {
            request.setAttribute(ERROR_SERVLET_NAME, requestData.getActiveServletName());
        }
        // send this exception as is (albeit unwrapping and wrapped
        // exception.
        Throwable t = se;
        while (t instanceof SlingException && t.getCause() != null) {
            t = t.getCause();
        }
        log.error("service: Uncaught SlingException", t);
        handleError(t, request, response);
    } catch (AccessControlException ace) {
        // SLING-319 if anything goes wrong, send 403/FORBIDDEN
        log.info("service: Authenticated user {} does not have enough rights to executed requested action", request.getRemoteUser());
        handleError(HttpServletResponse.SC_FORBIDDEN, null, request, response);
    } catch (UnavailableException ue) {
        // exception is thrown before the SlingHttpServletRequest/Response
        // is properly set up due to missing dependencies. In this case
        // we must not use the Sling error handling infrastructure but
        // just return a 503 status response handled by the servlet
        // container environment
        final int status = HttpServletResponse.SC_SERVICE_UNAVAILABLE;
        final String errorMessage = ue.getMessage() + " service missing, cannot service requests";
        log.error("{} , sending status {}", errorMessage, status);
        servletResponse.sendError(status, errorMessage);
    } catch (IOException ioe) {
        // forward IOException up the call chain to properly handle it
        throw ioe;
    } catch (Throwable t) {
        // we assume, that this is the name of the causing servlet
        if (requestData.getActiveServletName() != null) {
            request.setAttribute(ERROR_SERVLET_NAME, requestData.getActiveServletName());
        }
        log.error("service: Uncaught Throwable", t);
        handleError(t, request, response);
    } finally {
        if (mbean != null) {
            mbean.addRequestData(requestData);
        }
    }
}