public void handleResourceRequest()

in extscript-core-root/extscript-core/src/main/java/org/apache/myfaces/extensions/scripting/jsf/resources/deprecated/ResourceHandlerImpl.java [254:381]
88 lines of code
11 McCabe index (conditional complexity)

    public void handleResourceRequest(FacesContext facesContext) throws IOException
    {
        //try
        //{
            String resourceBasePath = getResourceHandlerSupport()
                    .calculateResourceBasePath(facesContext);

            if (resourceBasePath == null)
            {
                // No base name could be calculated, so no further
                //advance could be done here. HttpServletResponse.SC_NOT_FOUND
                //cannot be returned since we cannot extract the
                //resource base name
                return;
            }

            // We neet to get an instance of HttpServletResponse, but sometimes
            // the response object is wrapped by several instances of
            // ServletResponseWrapper (like ResponseSwitch).
            // Since we are handling a resource, we can expect to get an
            // HttpServletResponse.
            Object response = facesContext.getExternalContext().getResponse();

            //TODO merge the servlet response determination in
            HttpServletResponse httpServletResponse = (HttpServletResponse) response;
            if (httpServletResponse == null)
            {
                throw new IllegalStateException("Could not obtain an instance of HttpServletResponse.");
            }

            if (isResourceIdentifierExcluded(facesContext, resourceBasePath))
            {
                httpServletResponse.setStatus(HttpServletResponse.SC_NOT_FOUND);
                return;
            }

            String resourceName = null;
            if (resourceBasePath.startsWith(ResourceHandler.RESOURCE_IDENTIFIER))
            {
                resourceName = resourceBasePath
                        .substring(ResourceHandler.RESOURCE_IDENTIFIER.length() + 1);
            }
            else
            {
                //Does not have the conditions for be a resource call
                httpServletResponse.setStatus(HttpServletResponse.SC_NOT_FOUND);
                return;
            }

            String libraryName = facesContext.getExternalContext()
                    .getRequestParameterMap().get("ln");

            Resource resource = null;
            if (libraryName != null)
            {
                //log.info("libraryName=" + libraryName);
                resource = facesContext.getApplication().getResourceHandler().createResource(resourceName, libraryName);
            }
            else
            {
                resource = facesContext.getApplication().getResourceHandler().createResource(resourceName);
            }

            if (resource == null)
            {
                httpServletResponse.setStatus(HttpServletResponse.SC_NOT_FOUND);
                return;
            }

            if (!resource.userAgentNeedsUpdate(facesContext))
            {
                httpServletResponse.setStatus(HttpServletResponse.SC_NOT_MODIFIED);
                return;
            }

            httpServletResponse.setContentType(resource.getContentType());

            Map<String, String> headers = resource.getResponseHeaders();

            for (Map.Entry<String, String> entry : headers.entrySet())
            {
                httpServletResponse.setHeader(entry.getKey(), entry.getValue());
            }

            //serve up the bytes (taken from trinidad ResourceServlet)
            try
            {
                InputStream in = resource.getInputStream();
                OutputStream out = httpServletResponse.getOutputStream();
                byte[] buffer = new byte[_BUFFER_SIZE];

                try
                {
                    int count = pipeBytes(in, out, buffer);
                    //set the content lenght
                    httpServletResponse.setContentLength(count);
                }
                finally
                {
                    try
                    {
                        in.close();
                    }
                    finally
                    {
                        out.close();
                    }
                }
            }
            catch (IOException e)
            {
                //TODO: Log using a localized message (which one?)
                if (log.isLoggable(Level.SEVERE))
                    log.severe("Error trying to load resource " + resourceName
                            + " with library " + libraryName + " :"
                            + e.getMessage());
                httpServletResponse.setStatus(HttpServletResponse.SC_NOT_FOUND);
            }
       // }
      //  catch (Throwable ex)
      //  {
            // handle the Throwable accordingly. Maybe generate an error page.
            // FIXME we are creating a html error page for a non html request here
            // shouln't we do something better? -=Jakob Korherr=-
            //ErrorPageWriter.handleThrowable(facesContext, ex);
      //      throw new FacesException(ex);
      //  }
    }