/**
* This method renders the given request URI using the Sling request processing and stores the
* result at the request's location relative to the cache root folder. The request is processed in
* the context of the given user's session.
*
* @param uri The request URI including selectors and extensions
* @param configCacheRoot The cache root folder
* @param admin The admin session used to store the result in the cache
* @param session The user's session
* @return <code>true</code> if the cache was updated
*/
protected boolean renderResource(
String uri, String configCacheRoot, Session admin, Session session)
throws RepositoryException, ServletException, IOException {
String cachePath = configCacheRoot + getTargetPath(uri);
ResourceResolver resolver = null;
try {
resolver = createResolver(session.getUserID());
// render resource
ByteArrayOutputStream out = new ByteArrayOutputStream();
HttpServletRequest request = createRequest(uri);
HttpServletResponse response = requestResponseFactory.createResponse(out);
slingServlet.processRequest(request, response, resolver);
response.getWriter().flush();
// compare md5 checksum with cache
String md5 = requestResponseFactory.getMD5(response);
String md5Path = cachePath + "/" + JcrConstants.JCR_CONTENT + "/" + MD5_HASH_PROPERTY;
if (!admin.propertyExists(md5Path) || !admin.getProperty(md5Path).getString().equals(md5)) {
log.info("MD5 hash missing or not equal, updating content sync cache: {}", cachePath);
JcrUtil.createPath(cachePath, "sling:Folder", "nt:file", admin, false);
Node cacheContentNode =
JcrUtil.createPath(cachePath + "/jcr:content", "nt:resource", admin);
if (needsUtf8Encoding(response)) {
cacheContentNode.setProperty(
JcrConstants.JCR_DATA,
admin
.getValueFactory()
.createBinary(
IOUtils.toInputStream(out.toString(response.getCharacterEncoding()))));
} else {
cacheContentNode.setProperty(
JcrConstants.JCR_DATA,
admin.getValueFactory().createBinary(new ByteArrayInputStream(out.toByteArray())));
}
cacheContentNode.setProperty(JcrConstants.JCR_LASTMODIFIED, Calendar.getInstance());
if (response.getContentType() != null) {
cacheContentNode.setProperty(JcrConstants.JCR_MIMETYPE, response.getContentType());
}
if (response.getCharacterEncoding() != null) {
cacheContentNode.setProperty(JcrConstants.JCR_ENCODING, response.getCharacterEncoding());
}
cacheContentNode.addMixin(NT_MD5_HASH);
cacheContentNode.setProperty(MD5_HASH_PROPERTY, md5);
admin.save();
return true;
} else {
log.info("Skipping update of content sync cache: {}", uri);
return false;
}
} catch (LoginException e) {
log.error("Creating resource resolver for resource rendering failed: ", e);
return false;
} finally {
if (resolver != null) {
resolver.close();
}
if (admin.hasPendingChanges()) {
admin.refresh(false);
}
}
}
/**
* Creates a GET request for the given uri. This method can be overridden to provide a customized
* request object, e.g. with added parameters.
*
* @see com.day.cq.contentsync.handler.util.RequestResponseFactory
* @param uri The uri
* @return The request object
*/
protected HttpServletRequest createRequest(String uri) {
return requestResponseFactory.createRequest("GET", uri);
}