/**
* {@inheritDoc}
*
* <p>Processes page caching.
*/
@Override
protected void afterRender(final HTTPRequestContext context) throws Exception {
final HttpServletRequest request = context.getRequest();
final String pageContent = (String) request.getAttribute(PageCaches.CACHED_CONTENT);
if (null == pageContent) {
return;
}
if (Latkes.isPageCacheEnabled()) {
final String cachedPageKey = (String) request.getAttribute(Keys.PAGE_CACHE_KEY);
if (Strings.isEmptyOrNull(cachedPageKey)) {
return;
}
LOGGER.log(Level.FINEST, "Caching page[cachedPageKey={0}]", cachedPageKey);
check(request, pageContent);
final JSONObject cachedValue = new JSONObject();
cachedValue.put(PageCaches.CACHED_CONTENT, pageContent);
cachedValue.put(PageCaches.CACHED_TYPE, request.getAttribute(PageCaches.CACHED_TYPE));
cachedValue.put(PageCaches.CACHED_OID, request.getAttribute(PageCaches.CACHED_OID));
cachedValue.put(PageCaches.CACHED_TITLE, request.getAttribute(PageCaches.CACHED_TITLE));
cachedValue.put(PageCaches.CACHED_LINK, request.getAttribute(PageCaches.CACHED_LINK));
if (null != request.getAttribute(PageCaches.CACHED_PWD)) {
cachedValue.put(PageCaches.CACHED_PWD, request.getAttribute(PageCaches.CACHED_PWD));
}
PageCaches.put(cachedPageKey, cachedValue, request);
LOGGER.log(Level.FINEST, "Cached page[cachedPageKey={0}]", cachedPageKey);
}
}
/**
* Try to write response from cache.
*
* @param request the specified request
* @param response the specified response
* @param chain filter chain
* @throws IOException io exception
* @throws ServletException servlet exception
*/
@Override
public void doFilter(
final ServletRequest request, final ServletResponse response, final FilterChain chain)
throws IOException, ServletException {
final long startTimeMillis = System.currentTimeMillis();
request.setAttribute(Keys.HttpRequest.START_TIME_MILLIS, startTimeMillis);
final HttpServletRequest httpServletRequest = (HttpServletRequest) request;
final String requestURI = httpServletRequest.getRequestURI();
LOGGER.log(Level.FINER, "Request URI[{0}]", requestURI);
if (StaticResources.isStatic(httpServletRequest)) {
final String path = httpServletRequest.getServletPath() + httpServletRequest.getPathInfo();
LOGGER.log(Level.FINEST, "Requests a static resource, forwards to servlet[path={0}]", path);
request.getRequestDispatcher(path).forward(request, response);
return;
}
if (!Latkes.isPageCacheEnabled()) {
LOGGER.log(Level.FINEST, "Page cache is disabled");
chain.doFilter(request, response);
return;
}
final String skinDirName = (String) httpServletRequest.getAttribute(Keys.TEMAPLTE_DIR_NAME);
if ("mobile".equals(skinDirName)) {
// Mobile request, bypasses page caching
chain.doFilter(request, response);
return;
}
String pageCacheKey;
final String queryString = httpServletRequest.getQueryString();
pageCacheKey = (String) request.getAttribute(Keys.PAGE_CACHE_KEY);
if (Strings.isEmptyOrNull(pageCacheKey)) {
pageCacheKey = PageCaches.getPageCacheKey(requestURI, queryString);
request.setAttribute(Keys.PAGE_CACHE_KEY, pageCacheKey);
}
final JSONObject cachedPageContentObject =
PageCaches.get(pageCacheKey, httpServletRequest, (HttpServletResponse) response);
if (null == cachedPageContentObject) {
LOGGER.log(Level.FINER, "Page cache miss for request URI[{0}]", requestURI);
chain.doFilter(request, response);
return;
}
final String cachedType = cachedPageContentObject.optString(PageCaches.CACHED_TYPE);
try {
// If cached an article that has view password, dispatches the password form
if (langPropsService.get(PageTypes.ARTICLE.getLangeLabel()).equals(cachedType)
&& cachedPageContentObject.has(PageCaches.CACHED_PWD)) {
JSONObject article = new JSONObject();
final String articleId = cachedPageContentObject.optString(PageCaches.CACHED_OID);
article.put(Keys.OBJECT_ID, articleId);
article.put(
Article.ARTICLE_VIEW_PWD, cachedPageContentObject.optString(PageCaches.CACHED_PWD));
if (articles.needViewPwd(httpServletRequest, article)) {
article = articleRepository.get(articleId); // Loads the article entity
final HttpServletResponse httpServletResponse = (HttpServletResponse) response;
try {
httpServletResponse.sendRedirect(
Latkes.getServePath()
+ "/console/article-pwd"
+ articles.buildArticleViewPwdFormParameters(article));
return;
} catch (final Exception e) {
httpServletResponse.sendError(HttpServletResponse.SC_NOT_FOUND);
return;
}
}
}
} catch (final Exception e) {
LOGGER.log(Level.SEVERE, e.getMessage(), e);
chain.doFilter(request, response);
}
try {
LOGGER.log(
Level.FINEST, "Writes resposne for page[pageCacheKey={0}] from cache", pageCacheKey);
response.setContentType("text/html");
response.setCharacterEncoding("UTF-8");
final PrintWriter writer = response.getWriter();
String cachedPageContent = cachedPageContentObject.getString(PageCaches.CACHED_CONTENT);
final String topBarHTML =
TopBars.getTopBarHTML((HttpServletRequest) request, (HttpServletResponse) response);
cachedPageContent = cachedPageContent.replace(Common.TOP_BAR_REPLACEMENT_FLAG, topBarHTML);
final String cachedTitle = cachedPageContentObject.getString(PageCaches.CACHED_TITLE);
LOGGER.log(
Level.FINEST,
"Cached value[key={0}, type={1}, title={2}]",
new Object[] {pageCacheKey, cachedType, cachedTitle});
statistics.incBlogViewCount((HttpServletRequest) request, (HttpServletResponse) response);
final long endimeMillis = System.currentTimeMillis();
final String dateString = DateFormatUtils.format(endimeMillis, "yyyy/MM/dd HH:mm:ss");
final String msg =
String.format(
"<!-- Cached by B3log Solo(%1$d ms), %2$s -->",
endimeMillis - startTimeMillis, dateString);
LOGGER.finer(msg);
cachedPageContent += Strings.LINE_SEPARATOR + msg;
writer.write(cachedPageContent);
writer.flush();
writer.close();
} catch (final JSONException e) {
LOGGER.log(Level.SEVERE, e.getMessage(), e);
chain.doFilter(request, response);
} catch (final RepositoryException e) {
LOGGER.log(Level.SEVERE, e.getMessage(), e);
chain.doFilter(request, response);
} catch (final ServiceException e) {
LOGGER.log(Level.SEVERE, e.getMessage(), e);
chain.doFilter(request, response);
}
}