/**
* Get the expected name for the manifest cookie.
*
* @return the name (null if none)
*/
private static String getManifestCookieName() {
AuraContext context = Aura.getContextService().getCurrentContext();
if (context.getApplicationDescriptor() != null) {
StringBuilder sb = new StringBuilder();
if (context.getMode() != Mode.PROD) {
sb.append(context.getMode());
sb.append("_");
}
sb.append(context.getApplicationDescriptor().getNamespace());
sb.append("_");
sb.append(context.getApplicationDescriptor().getName());
sb.append(MANIFEST_COOKIE_TAIL);
return sb.toString();
}
return null;
}
/**
* check the top level component/app and get dependencies.
*
* <p>This routine checks to see that we have a valid top level component. If our top level
* component is out of sync, we have to ignore it here, but we _must_ force the client to not
* cache the response.
*
* <p>If there is a QFE, we substitute the QFE descriptor for the one given us, and continue.
* Again, we cannot allow caching.
*
* <p>Finally, if there is no descriptor given, we simply ignore the request and give them an
* empty response. Which is done here by returning null.
*
* <p>Also note that this handles the 'if-modified-since' header, as we want to tell the browser
* that nothing changed in that case.
*
* @param request the request (for exception handling)
* @param response the response (for exception handling)
* @param context the context to get the definition.
* @return the set of descriptors we are sending back, or null in the case that we handled the
* response.
* @throws IOException if there was an IO exception handling a client out of sync exception
* @throws ServletException if there was a problem handling the out of sync
*/
@Override
public Set<DefDescriptor<?>> verifyTopLevel(
HttpServletRequest request, HttpServletResponse response, AuraContext context)
throws IOException {
DefDescriptor<? extends BaseComponentDef> appDesc = context.getApplicationDescriptor();
MasterDefRegistry mdr = context.getDefRegistry();
context.setPreloading(true);
if (appDesc == null) {
//
// This means we have nothing to say to the client, so the response is
// left completely empty.
//
return null;
}
long ifModifiedSince = request.getDateHeader(HttpHeaders.IF_MODIFIED_SINCE);
String uid = context.getUid(appDesc);
try {
try {
definitionService.updateLoaded(appDesc);
if (uid != null && ifModifiedSince != -1) {
//
// In this case, we have an unmodified descriptor, so just tell
// the client that.
//
response.sendError(HttpServletResponse.SC_NOT_MODIFIED);
return null;
}
} catch (ClientOutOfSyncException coose) {
//
// We can't actually handle an out of sync here, since we are doing a
// resource load. We have to ignore it, and continue as if nothing happened.
// But in the process, we make sure to set 'no-cache' so that the result
// is thrown away. This may actually not give the right result in bizarre
// corner cases... beware cache inconsistencies on revert after a QFE.
//
// We actually probably should do something different, like send a minimalist
// set of stuff to make the client re-try.
//
this.setNoCache(response);
String oosUid = mdr.getUid(null, appDesc);
return mdr.getDependencies(oosUid);
}
} catch (QuickFixException qfe) {
//
// A quickfix exception means that we couldn't compile something.
// In this case, we still want to preload things, but we want to preload
// quick fix values, note that we force NoCache here.
//
this.setNoCache(response);
this.handleServletException(qfe, true, context, request, response, true);
return null;
}
this.setLongCache(response);
if (uid == null) {
uid = context.getUid(appDesc);
}
return mdr.getDependencies(uid);
}
/**
* Gets the UID for the application descriptor of the current context, or {@code null} if there is
* no application (probably because of a compile error).
*/
public String getContextAppUid(AuraContext context) {
DefDescriptor<? extends BaseComponentDef> app = context.getApplicationDescriptor();
if (app != null) {
try {
return definitionService.getDefRegistry().getUid(null, app);
} catch (QuickFixException e) {
// This is perfectly possible, but the error is handled in more
// contextually-sensible places. For here, we know there's no
// meaningful uid, so we fall through and return null.
}
}
return null;
}
/** Is AppCache allowed by the current configuration? */
public static boolean isManifestEnabled() {
if (!Aura.getConfigAdapter().isClientAppcacheEnabled()) {
return false;
}
AuraContext context = Aura.getContextService().getCurrentContext();
DefDescriptor<? extends BaseComponentDef> appDefDesc = context.getApplicationDescriptor();
if (appDefDesc != null && appDefDesc.getDefType().equals(DefType.APPLICATION)) {
try {
Boolean useAppcache = ((ApplicationDef) appDefDesc.getDef()).isAppcacheEnabled();
if (useAppcache != null) {
return useAppcache.booleanValue();
}
return false;
} catch (QuickFixException e) {
return false;
}
}
return false;
}
@Override
public void assertAccess(DefDescriptor<?> desc) throws QuickFixException {
if (!accessCache.contains(desc)) {
Aura.getLoggingService().incrementNum("SecurityProviderCheck");
DefType defType = desc.getDefType();
String ns = desc.getNamespace();
AuraContext context = Aura.getContextService().getCurrentContext();
Mode mode = context.getMode();
String prefix = desc.getPrefix();
//
// This breaks encapsulation! -gordon
//
boolean isTopLevel = desc.equals(context.getApplicationDescriptor());
if (isTopLevel) {
//
// If we are trying to access the top level component, we need to ensure
// that it is _not_ abstract.
//
BaseComponentDef def = getDef(context.getApplicationDescriptor());
if (def != null && def.isAbstract() && def.getProviderDescriptor() == null) {
throw new NoAccessException(
String.format("Access to %s disallowed. Abstract definition.", desc));
}
}
//
// If this is _not_ the top level, we allow circumventing the security provider.
// This means that certain things will short-circuit, hopefully making checks faster...
// Not sure if this is premature optimization or not.
//
if (!isTopLevel || desc.getDefType().equals(DefType.COMPONENT)) {
if (!securedDefTypes.contains(defType)
|| unsecuredPrefixes.contains(prefix)
|| unsecuredNamespaces.contains(ns)
|| (mode != Mode.PROD
&& (!Aura.getConfigAdapter().isProduction())
&& unsecuredNonProductionNamespaces.contains(ns))) {
accessCache.add(desc);
return;
}
if (ns != null && DefDescriptor.JAVA_PREFIX.equals(prefix)) {
// handle java packages that have namespaces like aura.impl.blah
for (String okNs : unsecuredNamespaces) {
if (ns.startsWith(okNs)) {
accessCache.add(desc);
return;
}
}
}
}
SecurityProviderDef securityProviderDef = getSecurityProvider();
if (securityProviderDef == null) {
if (mode != Mode.PROD && !Aura.getConfigAdapter().isProduction()) {
accessCache.add(desc);
return;
} else {
throw new NoAccessException(
String.format("Access to %s disallowed. No Security Provider found.", desc));
}
} else {
if (!securityProviderDef.isAllowed(desc)) {
throw new NoAccessException(
String.format(
"Access to %s disallowed by %s",
desc, securityProviderDef.getDescriptor().getName()));
}
}
accessCache.add(desc);
}
}
/**
* Handle an exception in the servlet.
*
* <p>This routine should be called whenever an exception has surfaced to the top level of the
* servlet. It should not be overridden unless Aura is entirely subsumed. Most special cases can
* be handled by the Aura user by implementing {@link ExceptionAdapter ExceptionAdapter}.
*
* @param t the throwable to write out.
* @param quickfix is this exception a valid quick-fix
* @param context the aura context.
* @param request the request.
* @param response the response.
* @param written true if we have started writing to the output stream.
* @throws IOException if the output stream does.
* @throws ServletException if send404 does (should not generally happen).
*/
@Override
public void handleServletException(
Throwable t,
boolean quickfix,
AuraContext context,
HttpServletRequest request,
HttpServletResponse response,
boolean written)
throws IOException {
try {
Throwable mappedEx = t;
boolean map = !quickfix;
Format format = context.getFormat();
//
// This seems to fail, though the documentation implies that you can do
// it.
//
// if (written && !response.isCommitted()) {
// response.resetBuffer();
// written = false;
// }
if (!written) {
// Should we only delete for JSON?
setNoCache(response);
}
if (mappedEx instanceof IOException) {
//
// Just re-throw IOExceptions.
//
throw (IOException) mappedEx;
} else if (mappedEx instanceof NoAccessException) {
Throwable cause = mappedEx.getCause();
String denyMessage = mappedEx.getMessage();
map = false;
if (cause != null) {
//
// Note that the exception handler can remap the cause here.
//
cause = exceptionAdapter.handleException(cause);
denyMessage += ": cause = " + cause.getMessage();
}
//
// Is this correct?!?!?!
//
if (format != Format.JSON) {
this.send404(request.getServletContext(), request, response);
if (!isProductionMode(context.getMode())) {
// Preserve new lines and tabs in the stacktrace since this is directly being written on
// to the
// page
denyMessage = "<pre>" + AuraTextUtil.escapeForHTML(denyMessage) + "</pre>";
response.getWriter().println(denyMessage);
}
return;
}
} else if (mappedEx instanceof QuickFixException) {
if (isProductionMode(context.getMode())) {
//
// In production environments, we want wrap the quick-fix. But be a little careful here.
// We should never mark the top level as a quick-fix, because that means that we gack
// on every mis-spelled app. In this case we simply send a 404 and bolt.
//
if (mappedEx instanceof DefinitionNotFoundException) {
DefinitionNotFoundException dnfe = (DefinitionNotFoundException) mappedEx;
if (dnfe.getDescriptor() != null
&& dnfe.getDescriptor().equals(context.getApplicationDescriptor())) {
// We're in production and tried to hit an aura app that doesn't exist.
// just show the standard 404 page.
this.send404(request.getServletContext(), request, response);
return;
}
}
map = true;
mappedEx = new AuraUnhandledException("404 Not Found (Application Error)", mappedEx);
}
}
if (map) {
mappedEx = exceptionAdapter.handleException(mappedEx);
}
PrintWriter out = response.getWriter();
//
// If we have written out data, We are kinda toast in this case.
// We really want to roll it all back, but we can't, so we opt
// for the best we can do. For HTML we can do nothing at all.
//
if (format == Format.JSON) {
if (!written) {
out.write(CSRF_PROTECT);
}
//
// If an exception happened while we were emitting JSON, we want the
// client to ignore the now-corrupt data structure. 404s and 500s
// cause the client to prepend /*, so we can effectively erase the
// bad data by appending a */ here and then serializing the exception
// info.
//
out.write("*/");
//
// Unfortunately we can't do the following now. It might be possible
// in some cases, but we don't want to go there unless we have to.
//
}
if (format == Format.JS || format == Format.CSS) {
// Make sure js and css doesn't get cached in browser, appcache, etc
response.setStatus(HttpStatus.SC_INTERNAL_SERVER_ERROR);
}
if (format == Format.JSON
|| format == Format.HTML
|| format == Format.JS
|| format == Format.CSS) {
//
// We only write out exceptions for HTML or JSON.
// Seems bogus, but here it is.
//
// Start out by cleaning out some settings to ensure we don't
// check too many things, leading to a circular failure. Note
// that this is still a bit dangerous, as we seem to have a lot
// of magic in the serializer.
//
// Clear the InstanceStack before trying to serialize the exception since the Throwable has
// likely
// rendered the stack inaccurate, and may falsely trigger NoAccessExceptions.
InstanceStack stack = this.contextService.getCurrentContext().getInstanceStack();
List<String> list = stack.getStackInfo();
for (int count = list.size(); count > 0; count--) {
stack.popInstance(stack.peek());
}
serializationService.write(mappedEx, null, out);
if (format == Format.JSON) {
out.write("/*ERROR*/");
}
}
} catch (IOException ioe) {
throw ioe;
} catch (Throwable death) {
//
// Catch any other exception and log it. This is actually kinda bad, because something has
// gone horribly wrong. We should write out some sort of generic page other than a 404,
// but at this point, it is unclear what we can do, as stuff is breaking right and left.
//
try {
response.setStatus(HttpStatus.SC_INTERNAL_SERVER_ERROR);
exceptionAdapter.handleException(death);
if (!isProductionMode(context.getMode())) {
response.getWriter().println(death.getMessage());
}
} catch (IOException ioe) {
throw ioe;
} catch (Throwable doubleDeath) {
// we are totally hosed.
if (!isProductionMode(context.getMode())) {
response.getWriter().println(doubleDeath.getMessage());
}
}
} finally {
this.contextService.endContext();
}
}
@Override
public void serialize(Json json, AuraContext ctx) throws IOException {
json.writeMapBegin();
json.writeMapEntry("mode", ctx.getMode());
DefDescriptor<? extends BaseComponentDef> appDesc = ctx.getApplicationDescriptor();
if (appDesc != null) {
if (appDesc.getDefType().equals(DefType.APPLICATION)) {
json.writeMapEntry(
"app", String.format("%s:%s", appDesc.getNamespace(), appDesc.getName()));
} else {
json.writeMapEntry(
"cmp", String.format("%s:%s", appDesc.getNamespace(), appDesc.getName()));
}
}
if (ctx.getSerializeThemes()) {
ThemeList themes = ctx.getThemeList();
if (!themes.isEmpty()) {
List<String> stringed = Lists.newArrayList();
for (DefDescriptor<ThemeDef> theme : themes) {
stringed.add(theme.getQualifiedName());
}
json.writeMapEntry("themes", stringed);
}
Optional<String> dynamicVarsUid = themes.getActiveDynamicVarsUid();
if (dynamicVarsUid.isPresent()) {
json.writeMapEntry("dynamicVarsUid", dynamicVarsUid.get());
}
}
if (ctx.getRequestedLocales() != null) {
List<String> locales = new ArrayList<>();
for (Locale locale : ctx.getRequestedLocales()) {
locales.add(locale.toString());
}
json.writeMapEntry("requestedLocales", locales);
}
Map<String, String> loadedStrings = Maps.newHashMap();
Map<DefDescriptor<?>, String> clientLoaded = Maps.newHashMap();
clientLoaded.putAll(ctx.getClientLoaded());
for (Map.Entry<DefDescriptor<?>, String> entry : ctx.getLoaded().entrySet()) {
loadedStrings.put(
String.format(
"%s@%s", entry.getKey().getDefType().toString(), entry.getKey().getQualifiedName()),
entry.getValue());
clientLoaded.remove(entry.getKey());
}
if (forClient) {
for (DefDescriptor<?> deleted : clientLoaded.keySet()) {
loadedStrings.put(
String.format("%s@%s", deleted.getDefType().toString(), deleted.getQualifiedName()),
DELETED);
}
}
if (loadedStrings.size() > 0) {
json.writeMapKey("loaded");
json.writeMap(loadedStrings);
}
if (ctx.getSerializeLastMod()) {
json.writeMapEntry("lastmod", Long.toString(AuraBaseServlet.getLastMod()));
}
TestContextAdapter testContextAdapter = Aura.get(TestContextAdapter.class);
if (testContextAdapter != null) {
TestContext testContext = testContextAdapter.getTestContext();
if (testContext != null) {
json.writeMapEntry("test", testContext.getName());
}
}
if (ctx.getFrameworkUID() != null) {
json.writeMapEntry("fwuid", ctx.getFrameworkUID());
}
if (forClient) {
// client needs value providers, urls don't
boolean started = false;
for (GlobalValueProvider valueProvider : ctx.getGlobalProviders().values()) {
if (!valueProvider.isEmpty()) {
if (!started) {
json.writeMapKey("globalValueProviders");
json.writeArrayBegin();
started = true;
}
json.writeComma();
json.writeIndent();
json.writeMapBegin();
json.writeMapEntry("type", valueProvider.getValueProviderKey().getPrefix());
json.writeMapEntry("values", valueProvider.getData());
json.writeMapEnd();
}
}
if (started) {
json.writeArrayEnd();
}
//
// Now comes the tricky part, we have to serialize all of the definitions that are
// required on the client side, and, of all types. This way, we won't have to handle
// ugly cases of actual definitions nested inside our configs, and, we ensure that
// all dependencies actually get sent to the client. Note that the 'loaded' set needs
// to be updated as well, but that needs to happen prior to this.
//
Map<DefDescriptor<? extends Definition>, Definition> defMap;
defMap = ctx.getDefRegistry().filterRegistry(ctx.getPreloadedDefinitions());
if (defMap.size() > 0) {
List<Definition> componentDefs = Lists.newArrayList();
List<Definition> eventDefs = Lists.newArrayList();
List<Definition> libraryDefs = Lists.newArrayList();
for (Map.Entry<DefDescriptor<? extends Definition>, Definition> entry :
defMap.entrySet()) {
DefDescriptor<? extends Definition> desc = entry.getKey();
DefType dt = desc.getDefType();
Definition d = entry.getValue();
//
// Ignore defs that ended up not being valid. This is arguably something
// that the MDR should have done when filtering.
//
if (d != null) {
if (DefType.COMPONENT.equals(dt) || DefType.APPLICATION.equals(dt)) {
componentDefs.add(d);
} else if (DefType.EVENT.equals(dt)) {
eventDefs.add(d);
} else if (DefType.LIBRARY.equals(dt)) {
libraryDefs.add(d);
}
}
}
writeDefs(json, "componentDefs", componentDefs);
writeDefs(json, "eventDefs", eventDefs);
writeDefs(json, "libraryDefs", libraryDefs);
}
ctx.serializeAsPart(json);
}
json.writeMapEnd();
}
/**
* Write out the manifest.
*
* <p>This writes out the full manifest for an application so that we can use the AppCache.
*
* <p>The manifest contains CSS and JavaScript URLs. These specified resources are copied into the
* AppCache with the HTML template. When the page is reloaded, the existing manifest is compared
* to the new manifest. If they are identical, the resources are served from the AppCache.
* Otherwise, the resources are requested from the server and the AppCache is updated.
*
* @param request the request
* @param response the response
* @param context the context
* @throws IOException if unable to write out the response
*/
@Override
public void write(HttpServletRequest request, HttpServletResponse response, AuraContext context)
throws IOException {
servletUtilAdapter.setNoCache(response);
try {
Map<String, Object> attributes = getComponentAttributes(request);
//
// First, we make sure that the manifest is enabled.
//
if (!manifestUtil.isManifestEnabled(request)) {
response.setStatus(HttpServletResponse.SC_NOT_FOUND);
return;
}
//
// Now we validate the cookie, which includes loop detection.
// this routine sets the response code.
//
if (!manifestUtil.checkManifestCookie(request, response)) {
return;
}
boolean appOk = false;
DefDescriptor<? extends BaseComponentDef> descr = null;
try {
descr = context.getApplicationDescriptor();
if (descr != null) {
definitionService.updateLoaded(descr);
appOk = true;
}
} catch (QuickFixException qfe) {
//
// ignore qfe, since we really don't care... the manifest will be 404ed.
// This will eventually cause the browser to give up. Note that this case
// should almost never occur, as it requires the qfe to be introduced between
// the initial request (which will not set a manifest if it gets a qfe) and
// the manifest request.
//
} catch (ClientOutOfSyncException coose) {
//
// In this case, we want to force a reload... A 404 on the manifest is
// supposed to handle this. we hope that the client will do the right
// thing, and reload everything. Note that this case really should only
// happen if the client already has content, and thus should be refreshing
// However, there are very odd edge cases that we probably can't detect
// without keeping server side state, such as the case that something
// is updated between the initial HTML request and the manifest request.
// Not sure what browsers will do in this case.
//
}
if (!appOk) {
response.setStatus(HttpServletResponse.SC_NOT_FOUND);
return;
}
//
// This writes both the app and framework signatures into
// the manifest, so that if either one changes, the
// manifest will change. Note that in most cases, we will
// write these signatures in multiple places, but we just
// need to make sure that they are in at least one place.
//
Map<String, Object> attribs = Maps.newHashMap();
String appUid = getContextAppUid(context);
String nonce = configAdapter.getAuraFrameworkNonce();
// Since we don't get the UID from our URL, we set it here.
context.setFrameworkUID(nonce);
attribs.put(LAST_MOD, String.format("app=%s, FW=%s", appUid, nonce));
attribs.put(UID, appUid);
StringWriter sw = new StringWriter();
String resetCssUrl = configAdapter.getResetCssURL();
if (resetCssUrl != null) {
sw.write(resetCssUrl);
sw.write('\n');
}
for (String s : servletUtilAdapter.getStyles(context)) {
sw.write(s);
sw.write('\n');
}
for (String s : servletUtilAdapter.getScripts(context, true, true, attributes)) {
sw.write(s);
sw.write('\n');
}
// Add locker service safe eval worker url
String lockerWorkerURL = configAdapter.getLockerWorkerURL();
if (lockerWorkerURL != null) {
sw.write(lockerWorkerURL);
sw.write('\n');
}
// Add in any application specific resources
if (descr != null && descr.getDefType().equals(DefType.APPLICATION)) {
ApplicationDef def = (ApplicationDef) descr.getDef();
for (String s : def.getAdditionalAppCacheURLs()) {
if (s != null) {
sw.write(s);
sw.write('\n');
}
}
}
attribs.put(RESOURCE_URLS, sw.toString());
DefDescriptor<ComponentDef> tmplDesc =
definitionService.getDefDescriptor("ui:manifest", ComponentDef.class);
Component tmpl = instanceService.getInstance(tmplDesc, attribs);
renderingService.render(tmpl, response.getWriter());
} catch (Exception e) {
Aura.getExceptionAdapter().handleException(e);
// Can't throw exception here: to set manifest OBSOLETE
response.setStatus(HttpServletResponse.SC_NOT_FOUND);
}
}
