@Override
public void onResourceRequested() {
// this is the callback that retrieves matching choices used to populate the dropdown
Request request = getRequestCycle().getRequest();
IRequestParameters params = request.getRequestParameters();
// retrieve choices matching the search term
String term = params.getParameterValue("term").toOptionalString();
int page = params.getParameterValue("page").toInt(1);
// select2 uses 1-based paging, but in wicket world we are used to
// 0-based
page -= 1;
Response<T> response = new Response<T>();
provider.query(term, page, response);
// jsonize and write out the choices to the response
WebResponse webResponse = (WebResponse) getRequestCycle().getResponse();
webResponse.setContentType("application/json");
OutputStreamWriter out =
new OutputStreamWriter(webResponse.getOutputStream(), getRequest().getCharset());
JSONWriter json = new JSONWriter(out);
try {
json.object();
json.key("results").array();
for (T item : response) {
json.object();
provider.toJson(item, json);
json.endObject();
}
json.endArray();
json.key("more").value(response.getHasMore()).endObject();
} catch (JSONException e) {
throw new RuntimeException("Could not write Json response", e);
}
try {
out.flush();
} catch (IOException e) {
throw new RuntimeException("Could not write Json to servlet response", e);
}
}
/**
* * Invokes one of the resource methods annotated with {@link MethodMapping}.
*
* @param mappedMethod mapping info of the method.
* @param attributes Attributes object for the current request.
* @return the value returned by the invoked method
*/
private Object invokeMappedMethod(MethodMappingInfo mappedMethod, Attributes attributes) {
Method method = mappedMethod.getMethod();
List parametersValues = new ArrayList();
// Attributes objects
PageParameters pageParameters = attributes.getParameters();
WebResponse response = (WebResponse) attributes.getResponse();
HttpMethod httpMethod = HttpUtils.getHttpMethod((WebRequest) RequestCycle.get().getRequest());
LinkedHashMap<String, String> pathParameters =
mappedMethod.populatePathParameters(pageParameters);
Iterator<String> pathParamsIterator = pathParameters.values().iterator();
Class<?>[] parameterTypes = method.getParameterTypes();
for (int i = 0; i < parameterTypes.length; i++) {
Object paramValue = null;
MethodParameter methodParameter = new MethodParameter(parameterTypes[i], mappedMethod, i);
Annotation annotation = ReflectionUtils.getAnnotationParam(i, method);
// retrieve parameter value
if (annotation != null)
paramValue =
extractParameterValue(methodParameter, pathParameters, annotation, pageParameters);
else paramValue = extractParameterFromUrl(methodParameter, pathParamsIterator);
// try to use the default value
if (paramValue == null && !methodParameter.getDeaultValue().isEmpty())
paramValue =
toObject(methodParameter.getParameterClass(), methodParameter.getDeaultValue());
if (paramValue == null && methodParameter.isRequired()) {
response.sendError(
400,
"No suitable method found for URL '"
+ extractUrlFromRequest()
+ "' and HTTP method "
+ httpMethod);
return null;
}
parametersValues.add(paramValue);
}
try {
return method.invoke(this, parametersValues.toArray());
} catch (Exception e) {
response.sendError(500, "General server error.");
throw new RuntimeException("Error invoking method '" + method.getName() + "'", e);
}
}
/**
* Method invoked to serialize the result of the invoked method and write this value to the
* response.
*
* @param response The current response object.
* @param result The object to write to response.
* @param restMimeFormats
*/
private void serializeObjectToResponse(WebResponse response, Object result, String mimeType) {
try {
response.setContentType(mimeType);
objSerialDeserial.objectToResponse(result, response, mimeType);
} catch (Exception e) {
throw new RuntimeException("Error writing object to response.", e);
}
}
@Override
public void respond(IRequestCycle requestCycle) {
String location = url.toString();
if (location.startsWith("/")) {
// context-absolute url
location = requestCycle.getUrlRenderer().renderContextRelativeUrl(location);
}
if (config.isPreferStateful()) {
// we need to persist the session before a redirect to https so the session lasts
// across both http and https calls.
Session.get().bind();
}
WebResponse response = (WebResponse) requestCycle.getResponse();
response.sendRedirect(location);
}
/**
* Utility method to convert string values to the corresponding objects.
*
* @param clazz the type of the object we want to obtain.
* @param value the string value we want to convert.
* @return the object corresponding to the converted string value, or null if value parameter is
* null
*/
public static Object toObject(Class clazz, String value) throws IllegalArgumentException {
if (value == null) return null;
// we use the standard Wicket conversion mechanism to obtain the
// converted value.
try {
IConverter converter = Application.get().getConverterLocator().getConverter(clazz);
return converter.convertToObject(value, Session.get().getLocale());
} catch (Exception e) {
WebResponse response = (WebResponse) RequestCycle.get().getResponse();
response.setStatus(400);
response.write(
"Could not find a suitable constructor for value '"
+ value
+ "' of type '"
+ clazz
+ "'");
return null;
}
}
/**
* * Handles a REST request invoking one of the methods annotated with {@link MethodMapping}. If
* the annotated method returns a value, this latter is automatically serialized to a given string
* format (like JSON, XML, etc...) and written to the web response.<br>
* If no method is found to serve the current request, a 400 HTTP code is returned to the client.
* Similarly, a 401 HTTP code is return if the user doesn't own one of the roles required to
* execute an annotated method (See {@link AuthorizeInvocation}).
*/
@Override
public final void respond(Attributes attributes) {
PageParameters pageParameters = attributes.getParameters();
WebResponse response = (WebResponse) attributes.getResponse();
HttpMethod httpMethod = HttpUtils.getHttpMethod((WebRequest) RequestCycle.get().getRequest());
int indexedParamCount = pageParameters.getIndexedCount();
// mapped method are stored concatenating the number of the segments of
// their URL and their HTTP method (see annotation MethodMapping)
List<MethodMappingInfo> mappedMethodsCandidates =
mappedMethods.get(indexedParamCount + "_" + httpMethod.getMethod());
MethodMappingInfo mappedMethod =
selectMostSuitedMethod(mappedMethodsCandidates, pageParameters);
if (mappedMethod != null) {
if (!hasAny(mappedMethod.getRoles())) {
response.sendError(401, "User is not allowed to invoke method on server.");
return;
}
onBeforeMethodInvoked(mappedMethod, attributes);
Object result = invokeMappedMethod(mappedMethod, attributes);
onAfterMethodInvoked(mappedMethod, attributes, result);
// if the invoked method returns a value, it is written to response
if (result != null) {
serializeObjectToResponse(response, result, mappedMethod.getMimeOutputFormat());
}
} else {
response.sendError(
400,
"No suitable method found for URL '"
+ extractUrlFromRequest()
+ "' and HTTP method "
+ httpMethod);
}
}
/**
* @see
* org.apache.wicket.core.request.handler.IPageRequestHandler#respond(org.apache.wicket.request.IRequestCycle)
*/
@Override
public final void respond(final IRequestCycle requestCycle) {
final RequestCycle rc = (RequestCycle) requestCycle;
final WebResponse response = (WebResponse) requestCycle.getResponse();
if (shouldRedirectToPage(requestCycle)) {
// the page itself has been added to the request target, we simply issue a redirect
// back to the page
IRequestHandler handler = new RenderPageRequestHandler(new PageProvider(page));
final String url = rc.urlFor(handler).toString();
response.sendRedirect(url);
return;
}
respondersFrozen = true;
for (ITargetRespondListener listener : respondListeners) {
listener.onTargetRespond(this);
}
final Application app = page.getApplication();
page.send(app, Broadcast.BREADTH, this);
// Determine encoding
final String encoding = app.getRequestCycleSettings().getResponseRequestEncoding();
// Set content type based on markup type for page
update.setContentType(response, encoding);
// Make sure it is not cached by a client
response.disableCaching();
final StringResponse bodyResponse = new StringResponse();
update.writeTo(bodyResponse, encoding);
CharSequence filteredResponse = invokeResponseFilters(bodyResponse);
response.write(filteredResponse);
}
public String getWorkspace() {
String workspace = getWorkspaceFromUrl();
if (workspace != null) {
return workspace;
}
RequestCycle rc = RequestCycle.get();
workspace = rc.getMetaData(WORKSPACE_METADATA);
if (workspace == null) {
WebRequest req = (WebRequest) RequestCycle.get().getRequest();
WebResponse resp = (WebResponse) RequestCycle.get().getResponse();
Cookie cookie = req.getCookie(COOKIE_NAME);
workspace = getDefaultWorkspaceName();
if (cookie != null) {
if (cookie.getValue() != null) {
workspace = cookie.getValue();
}
}
if (!checkSession(workspace)) {
workspace = getDefaultWorkspaceName();
}
if (workspace == null) {
throw new IllegalStateException(
"Could not resolve jcr workspace to use for this request " + req.getUrl());
}
Cookie c = new Cookie(COOKIE_NAME, workspace);
c.setPath("/");
if (workspace.toString().equals(getDefaultWorkspaceName()) == false) {
resp.addCookie(c);
} else if (cookie != null) {
resp.clearCookie(cookie);
}
rc.setMetaData(WORKSPACE_METADATA, workspace);
}
return workspace;
}
@Override
public void objectToResponse(Object targetObject, WebResponse response, String mimeType)
throws WicketRuntimeException {
setCharsetResponse(response);
String strOutput;
if (RestMimeTypes.TEXT_PLAIN.equals(mimeType)) {
strOutput = targetObject == null ? "" : targetObject.toString();
} else {
strOutput = objectSerialDeserial.serializeObject(targetObject, mimeType);
}
response.write(strOutput);
}
/**
* This is Wicket's main method to execute a request
*
* @param request
* @param response
* @param chain
* @return false, if the request could not be processed
* @throws IOException
* @throws ServletException
*/
boolean processRequest(
ServletRequest request, final ServletResponse response, final FilterChain chain)
throws IOException, ServletException {
final ThreadContext previousThreadContext = ThreadContext.detach();
// Assume we are able to handle the request
boolean res = true;
final ClassLoader previousClassLoader = Thread.currentThread().getContextClassLoader();
final ClassLoader newClassLoader = getClassLoader();
try {
if (previousClassLoader != newClassLoader) {
Thread.currentThread().setContextClassLoader(newClassLoader);
}
HttpServletRequest httpServletRequest = (HttpServletRequest) request;
HttpServletResponse httpServletResponse = (HttpServletResponse) response;
// Make sure getFilterPath() gets called before checkIfRedirectRequired()
String filterPath = getFilterPath(httpServletRequest);
if (filterPath == null) {
throw new IllegalStateException("filter path was not configured");
}
if (shouldIgnorePath(httpServletRequest)) {
log.debug("Ignoring request {}", httpServletRequest.getRequestURL());
if (chain != null) {
chain.doFilter(request, response);
}
return false;
}
String redirectURL = checkIfRedirectRequired(httpServletRequest);
if (redirectURL == null) {
// No redirect; process the request
ThreadContext.setApplication(application);
WebRequest webRequest = application.createWebRequest(httpServletRequest, filterPath);
WebResponse webResponse = application.createWebResponse(webRequest, httpServletResponse);
RequestCycle requestCycle = application.createRequestCycle(webRequest, webResponse);
if (!requestCycle.processRequestAndDetach()) {
if (chain != null) {
chain.doFilter(request, response);
}
res = false;
} else {
webResponse.flush();
}
} else {
if (Strings.isEmpty(httpServletRequest.getQueryString()) == false) {
redirectURL += "?" + httpServletRequest.getQueryString();
}
try {
// send redirect - this will discard POST parameters if the request is POST
// - still better than getting an error because of lacking trailing slash
httpServletResponse.sendRedirect(httpServletResponse.encodeRedirectURL(redirectURL));
} catch (IOException e) {
throw new RuntimeException(e);
}
}
} finally {
ThreadContext.restore(previousThreadContext);
if (newClassLoader != previousClassLoader) {
Thread.currentThread().setContextClassLoader(previousClassLoader);
}
if (response.isCommitted()) {
response.flushBuffer();
}
}
return res;
}
@Override
protected void setHeaders(final WebResponse response) {
response.setStatus(HttpServletResponse.SC_NOT_FOUND);
}
/**
* Sets the charset for the current response.
*
* @param response the current response
*/
private void setCharsetResponse(WebResponse response) {
if (response.getContainerResponse() instanceof ServletResponse) {
ServletResponse sResponse = (ServletResponse) response.getContainerResponse();
sResponse.setCharacterEncoding(charset);
}
}
@Override
protected void setHeaders(WebResponse response) {
super.setHeaders(response);
// Protection against ClickJacking, prevents the page from being rendered in an iframe element
response.setHeader("X-Frame-Options", "deny");
}
@Override
protected void configureResponse(WebResponse response) {
super.configureResponse(response);
response.setStatus(HttpServletResponse.SC_FORBIDDEN);
}
@Override
public void setContentType(WebResponse response, String encoding) {
response.setContentType("text/xml; charset=" + encoding);
}
@Override
protected void setHeaders(WebResponse response) {
response.disableCaching();
super.setHeaders(response);
}
