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// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.jdisc.http.filter;
import java.net.URI;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.Optional;
import com.yahoo.jdisc.AbstractResource;
import com.yahoo.jdisc.Request;
import com.yahoo.jdisc.Response;
import com.yahoo.jdisc.http.HttpRequest;
import com.yahoo.jdisc.http.HttpResponse;
/**
* Implementation of TypedFilterChain for DiscFilterResponse
* @author tejalk
*
*/
public class SecurityResponseFilterChain extends AbstractResource implements ResponseFilter {
private final List<SecurityResponseFilter> filters = new ArrayList<>();
private SecurityResponseFilterChain(Iterable<? extends SecurityResponseFilter> filters) {
for (SecurityResponseFilter filter : filters) {
this.filters.add(filter);
}
}
@Override
public void filter(Response response, Request request) {
if(response instanceof HttpResponse) {
DiscFilterResponse discFilterResponse = new JdiscFilterResponse((HttpResponse)response);
RequestView requestView = new RequestViewImpl(request);
filter(requestView, discFilterResponse);
}
}
public void filter(RequestView requestView, DiscFilterResponse response) {
for (SecurityResponseFilter filter : filters) {
filter.filter(response, requestView);
}
}
public static ResponseFilter newInstance(SecurityResponseFilter... filters) {
return newInstance(Arrays.asList(filters));
}
public static ResponseFilter newInstance(List<? extends SecurityResponseFilter> filters) {
return new SecurityResponseFilterChain(filters);
}
/** Returns an unmodifiable view of the filters in this */
public List<SecurityResponseFilter> getFilters() {
return Collections.unmodifiableList(filters);
}
private static class RequestViewImpl implements RequestView {
private final Request request;
private final Optional<HttpRequest.Method> method;
public RequestViewImpl(Request request) {
this.request = request;
method = request instanceof HttpRequest ?
Optional.of(((HttpRequest) request).getMethod()):
Optional.empty();
}
@Override
public Object getAttribute(String name) {
return request.context().get(name);
}
@Override
public Optional<HttpRequest.Method> getMethod() {
return method;
}
@Override
public URI getUri() {
return request.getUri();
}
}
}
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