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EncodingEnsuringDirective.java
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EncodingEnsuringDirective.java
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/*
* Copyright (c) 2017 Contributors to the Eclipse Foundation
*
* See the NOTICE file(s) distributed with this work for additional
* information regarding copyright ownership.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0
*
* SPDX-License-Identifier: EPL-2.0
*/
package org.eclipse.ditto.gateway.service.endpoints.directives;
import static org.apache.pekko.http.javadsl.server.Directives.complete;
import static org.apache.pekko.http.javadsl.server.Directives.extractRequestContext;
import java.text.MessageFormat;
import java.util.function.Supplier;
import org.eclipse.ditto.gateway.service.endpoints.utils.HttpUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.pekko.http.javadsl.model.StatusCodes;
import org.apache.pekko.http.javadsl.model.Uri;
import org.apache.pekko.http.javadsl.server.Route;
import org.apache.pekko.http.scaladsl.model.IllegalUriException;
/**
* Custom Akka Http directive ensuring that request uris are encoded.
*/
public final class EncodingEnsuringDirective {
private static final Logger LOGGER = LoggerFactory.getLogger(EncodingEnsuringDirective.class);
private static final String URI_INVALID_TEMPLATE =
"URI ''{0}'' contains invalid characters. Please encode your URI according to RFC 3986.";
private EncodingEnsuringDirective() {
throw new AssertionError();
}
public static Route ensureEncoding(final Supplier<Route> inner) {
return extractRequestContext(requestContext -> {
final Uri uri = requestContext.getRequest().getUri();
try {
// per default, Akka evaluates the query params "lazily" in the routes and throws an IllegalUriException
// in case of error; we evaluate the query params explicitly here to be able to handle this error at
// a central location
uri.query();
} catch (final IllegalUriException e) {
LOGGER.debug("URI parsing failed", e);
final String rawRequestUri = HttpUtils.getRawRequestUri(requestContext.getRequest());
final String message = MessageFormat.format(URI_INVALID_TEMPLATE, rawRequestUri);
return complete(StatusCodes.BAD_REQUEST, message);
}
return inner.get();
});
}
}