public void handleRequest()

in fileservice/src/main/java/org/apache/asyncweb/fileservice/FileHttpService.java [92:183]
59 lines of code
11 McCabe index (conditional complexity)

    public void handleRequest(HttpServiceContext context) throws Exception {
        URI uri = context.getRequest().getRequestUri();
        String path = uri.getPath();
        
        LOG.info("Handling file request : {} from {}",uri,context.getRemoteAddress());

        if (!path.startsWith(baseUrl)) {
            // error the requested URL is not in the base URL
            //TODO : find the good exception to throw
            throw new InvalidParameterException("Wrong URL");
        }

        MutableHttpResponse response = new DefaultHttpResponse();

        path = path.substring(baseUrl.length());
        File f = new File(basePath + File.separator + path);

        if (f.isDirectory()) {

            // is the request finishing by the '/' character ?
            String urlStr = uri.toString();

            if (urlStr.charAt(urlStr.length() - 1) != '/') {

                LOG.debug("Redirecting {} to {}/", urlStr, urlStr);

                // send back the good URI
                response.setStatus(HttpResponseStatus.MOVED_PERMANENTLY);
                response.setHeader("Location", urlStr + "/");
                context.commitResponse(response);
                return;
            }

            // search for index file
            String[] indexes = f.list(indexFileFilter);
            if (indexes.length == 0) {

                LOG.info("Serving directory index for {}", f.getAbsolutePath());

                if (indexGenerator != null) {
                    // create a directory index page
                    IoBuffer indexResponse = indexGenerator.generateIndex(f);
                    indexResponse.flip();
                    response.setContent(indexResponse);
                    response.setHeader("Content-Type", "text/html");
                    response.setStatus(HttpResponseStatus.OK);
                    context.commitResponse(response);
                    return;
                }
            } else {
                // just serve the index file (ex:index.html) 
                f = new File(f.getAbsolutePath() + File.separator + indexes[0]);
            }

        }
        if (f.exists() && !f.isDirectory()) {

            LOG.info("Serving file {}",f.getAbsolutePath());

            // caching processing
            if (cachingPolicy == null
                    || !cachingPolicy.isCacheable(f, context.getRequest())) {
                response.setHeader("Pragma", "no-cache");
                response.setHeader("Cache-Control", "no-cache");
            } else {
                cachingPolicy.testAndSetCacheHit(f, context.getRequest(),
                        response);
            }

            // setting mime-type based on the mime-map

            String contentType = mimeMap.getContentType(MimeMap.getExtension(f
                    .getName()));

            if (contentType != null)
                response.setHeader("Content-Type", contentType);

            response.setStatus(HttpResponseStatus.OK);

            IoBuffer buffer=fileLoader.loadFile(f);
            
            response.setContent(buffer);
            
        } else {
            // the file is not found, we send the famous 404 error
            response.setStatus(HttpResponseStatus.NOT_FOUND);
            response.setStatusReasonPhrase("File \"" + path + "\"");
            LOG.warn("The file {} is not found",f.getAbsolutePath());
        }
        context.commitResponse(response);

    }