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/*
* Copyright 2010-2016 Steve Chaloner
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package be.objectify.deadbolt.java;
import be.objectify.deadbolt.java.cache.HandlerCache;
import be.objectify.deadbolt.java.models.PatternType;
import com.typesafe.config.Config;
import com.typesafe.config.ConfigFactory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import play.mvc.Http;
import javax.inject.Inject;
import javax.inject.Singleton;
import java.util.HashMap;
import java.util.List;
import java.util.Optional;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
import java.util.function.BiFunction;
import java.util.function.Supplier;
/**
* Provides the entry point for view-level annotations.
*
* @author Steve Chaloner ([email protected])
*/
@Singleton
public class ViewSupport
{
private static final Logger LOGGER = LoggerFactory.getLogger(ViewSupport.class);
public final Supplier defaultTimeout;
private final HandlerCache handlerCache;
private final TemplateFailureListener failureListener;
private final BiFunction timeoutHandler;
private final ConstraintLogic constraintLogic;
@Inject
public ViewSupport(final Config config,
final HandlerCache handlerCache,
final TemplateFailureListenerProvider failureListener,
final ConstraintLogic constraintLogic)
{
this.handlerCache = handlerCache;
this.failureListener = failureListener.get();
this.constraintLogic = constraintLogic;
final HashMap defaults = new HashMap<>();
defaults.put(ConfigKeys.DEFAULT_VIEW_TIMEOUT_DEFAULT._1,
ConfigKeys.DEFAULT_VIEW_TIMEOUT_DEFAULT._2);
final Config configWithFallback = config.withFallback(ConfigFactory.parseMap(defaults));
final Long timeout = configWithFallback.getLong(ConfigKeys.DEFAULT_VIEW_TIMEOUT_DEFAULT._1);
LOGGER.info("Default timeout period for blocking views is [{}]ms",
timeout);
this.defaultTimeout = () -> timeout;
timeoutHandler = (timeoutInMillis, e) ->
{
LOGGER.error("Timeout when attempting to complete future within [{}]ms. Denying access to resource.",
timeoutInMillis,
e);
this.failureListener.failure("Error when checking view constraint: " + e.getMessage(),
timeoutInMillis);
return false;
};
}
/**
* Used for restrict tags in the template.
*
* @param roles a list of String arrays. Within an array, the roles are ANDed. The arrays in the list are OR'd.
* @return true if the view can be accessed, otherwise false
*/
public boolean viewRestrict(final List roles,
final DeadboltHandler handler,
final Optional content,
final long timeoutInMillis) throws Throwable
{
boolean allowed;
try
{
allowed = constraintLogic.restrict(Http.Context.current(),
handler(handler),
content,
() -> roles,
ctx -> CompletableFuture.completedFuture(Boolean.TRUE),
(ctx, dh, cnt) -> CompletableFuture.completedFuture(Boolean.FALSE),
ConstraintPoint.TEMPLATE)
.toCompletableFuture()
.get(timeoutInMillis,
TimeUnit.MILLISECONDS);
}
catch (TimeoutException e)
{
allowed = timeoutHandler.apply(timeoutInMillis,
e);
}
return allowed;
}
/**
* Used for dynamic tags in the template.
*
* @param name the name of the resource
* @param meta meta information on the resource
* @return true if the view can be accessed, otherwise false
*/
public boolean viewDynamic(final String name,
final Optional meta,
final DeadboltHandler handler,
final Optional content,
final long timeoutInMillis) throws Throwable
{
boolean allowed;
try
{
allowed = constraintLogic.dynamic(Http.Context.current(),
handler(handler),
content,
name,
meta,
ctx -> CompletableFuture.completedFuture(Boolean.TRUE),
(ctx, dh, cnt) -> CompletableFuture.completedFuture(Boolean.FALSE),
ConstraintPoint.TEMPLATE)
.toCompletableFuture()
.get(timeoutInMillis,
TimeUnit.MILLISECONDS);
}
catch (TimeoutException e)
{
allowed = timeoutHandler.apply(timeoutInMillis,
e);
}
return allowed;
}
/**
* Used for subjectPresent tags in the template.
*
* @return true if the view can be accessed, otherwise false
*/
public boolean viewSubjectPresent(final DeadboltHandler handler,
final Optional content,
final long timeoutInMillis) throws Throwable
{
boolean allowed;
try
{
allowed = constraintLogic.subjectPresent(Http.Context.current(),
handler == null ? handlerCache.get()
: handler,
content,
(ctx, dh, cnt) -> CompletableFuture.completedFuture(Boolean.TRUE),
(ctx, dh, cnt) -> CompletableFuture.completedFuture(Boolean.FALSE),
ConstraintPoint.TEMPLATE)
.toCompletableFuture()
.get(timeoutInMillis,
TimeUnit.MILLISECONDS);
}
catch (TimeoutException e)
{
allowed = timeoutHandler.apply(timeoutInMillis,
e);
}
return allowed;
}
/**
* Used for subjectNotPresent tags in the template.
*
* @return true if the view can be accessed, otherwise false
*/
public boolean viewSubjectNotPresent(final DeadboltHandler handler,
final Optional content,
final long timeoutInMillis) throws Throwable
{
boolean allowed;
try
{
allowed = constraintLogic.subjectNotPresent(Http.Context.current(),
handler(handler),
content,
(ctx, dh, cnt) -> CompletableFuture.completedFuture(Boolean.FALSE),
(ctx, dh, cnt) -> CompletableFuture.completedFuture(Boolean.TRUE),
ConstraintPoint.TEMPLATE)
.toCompletableFuture()
.get(timeoutInMillis,
TimeUnit.MILLISECONDS);
}
catch (TimeoutException e)
{
allowed = timeoutHandler.apply(timeoutInMillis,
e);
}
return allowed;
}
public boolean viewPattern(final String value,
final PatternType patternType,
final Optional meta,
final boolean invert,
final DeadboltHandler handler,
final Optional content,
final long timeoutInMillis) throws Exception
{
boolean allowed;
try
{
allowed = constraintLogic.pattern(Http.Context.current(),
handler(handler),
content,
value,
patternType,
meta,
invert,
ctx -> CompletableFuture.completedFuture(Boolean.TRUE),
(ctx, dh, cnt) -> CompletableFuture.completedFuture(Boolean.FALSE),
ConstraintPoint.TEMPLATE)
.toCompletableFuture()
.get(timeoutInMillis,
TimeUnit.MILLISECONDS);
}
catch (TimeoutException e)
{
allowed = timeoutHandler.apply(timeoutInMillis,
e);
}
return allowed;
}
/**
* Used for role-based permissions tags in the template.
*
* @param roleName the role name that is the key for the permission set
* @return true if the view can be accessed, otherwise false
*/
public boolean viewRoleBasedPermissions(final String roleName,
final DeadboltHandler handler,
final Optional content,
final long timeoutInMillis) throws Throwable
{
boolean allowed;
try
{
allowed = constraintLogic.roleBasedPermissions(Http.Context.current(),
handler(handler),
content,
roleName,
ctx -> CompletableFuture.completedFuture(Boolean.TRUE),
(ctx, dh, cnt) -> CompletableFuture.completedFuture(Boolean.FALSE),
ConstraintPoint.TEMPLATE)
.toCompletableFuture()
.get(timeoutInMillis,
TimeUnit.MILLISECONDS);
}
catch (TimeoutException e)
{
allowed = timeoutHandler.apply(timeoutInMillis,
e);
}
return allowed;
}
private DeadboltHandler handler(final DeadboltHandler handler)
{
return handler == null ? handlerCache.get()
: handler;
}
}
