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// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.container.jdisc;
import com.yahoo.component.ComponentId;
import com.yahoo.component.ComponentSpecification;
import com.yahoo.component.provider.ComponentRegistry;
import com.yahoo.container.http.filter.FilterChainRepository;
import com.yahoo.jdisc.application.BindingRepository;
import com.yahoo.jdisc.application.UriPattern;
import com.yahoo.jdisc.http.filter.RequestFilter;
import com.yahoo.jdisc.http.filter.ResponseFilter;
import com.yahoo.jdisc.http.filter.SecurityRequestFilter;
import com.yahoo.jdisc.http.filter.SecurityRequestFilterChain;
import java.util.List;
/**
* Helper class to set up filter binding repositories based on config.
*
* @author Øyvind Bakksjø
*/
class FilterUtil {
private static final ComponentId SEARCH_SERVER_COMPONENT_ID = ComponentId.fromString("SearchServer");
private final BindingRepository<RequestFilter> requestFilters;
private final BindingRepository<ResponseFilter> responseFilters;
private FilterUtil(BindingRepository<RequestFilter> requestFilters, BindingRepository<ResponseFilter> responseFilters) {
this.requestFilters = requestFilters;
this.responseFilters = responseFilters;
}
private void configureFilters(List<FilterSpec> filtersConfig, FilterChainRepository filterChainRepository) {
for (FilterSpec filterConfig : filtersConfig) {
Object filter = filterChainRepository.getFilter(ComponentSpecification.fromString(filterConfig.getId()));
if (filter == null) {
throw new RuntimeException("No http filter with id " + filterConfig.getId());
}
addFilter(filter, filterConfig.getBinding());
}
}
private void addFilter(Object filter, String binding) {
if (filter instanceof RequestFilter && filter instanceof ResponseFilter) {
throw new RuntimeException("The filter " + filter.getClass().getName() +
" is unsupported since it's both a RequestFilter and a ResponseFilter.");
} else if (filter instanceof RequestFilter) {
requestFilters.put(new UriPattern(binding), (RequestFilter) filter);
} else if (filter instanceof ResponseFilter) {
responseFilters.put(new UriPattern(binding), (ResponseFilter) filter);
} else {
throw new RuntimeException("Unknown filter type " + filter.getClass().getName());
}
}
//TVT: remove
private void configureLegacyFilters(ComponentId id, ComponentRegistry<SecurityRequestFilter> legacyRequestFilters) {
ComponentId serverName = id.getNamespace();
if (SEARCH_SERVER_COMPONENT_ID.equals(serverName) && !legacyRequestFilters.allComponents().isEmpty()) {
requestFilters.bind("http://*/*",
SecurityRequestFilterChain.newInstance(legacyRequestFilters.allComponents()));
}
}
/**
* Populates binding repositories with filters based on config.
*
* @param requestFilters output argument that will be mutated
* @param responseFilters output argument that will be mutated
*/
public static void setupFilters(ComponentId componentId,
ComponentRegistry<SecurityRequestFilter> legacyRequestFilters,
List<FilterSpec> filtersConfig,
FilterChainRepository filterChainRepository,
BindingRepository<RequestFilter> requestFilters,
BindingRepository<ResponseFilter> responseFilters) {
FilterUtil filterUtil = new FilterUtil(requestFilters, responseFilters);
// TODO: remove
filterUtil.configureLegacyFilters(componentId, legacyRequestFilters);
filterUtil.configureFilters(filtersConfig, filterChainRepository);
}
public static class FilterSpec {
private final String id;
private final String binding;
public FilterSpec(String id, String binding) {
this.id = id;
this.binding = binding;
}
public String getId() {
return id;
}
public String getBinding() {
return binding;
}
}
}
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