/*
* Copyright 2014 gitblit.com.
*
* 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 com.gitblit.servlet;
import java.io.IOException;
import java.util.Iterator;
import java.util.List;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import ro.fortsoft.pf4j.PluginWrapper;
import com.gitblit.dagger.DaggerFilter;
import com.gitblit.extensions.HttpRequestFilter;
import com.gitblit.manager.IPluginManager;
import com.gitblit.manager.IRuntimeManager;
import dagger.ObjectGraph;
/**
* A request filter than allows registered extension request filters to access
* request data. The intended purpose is for server monitoring plugins.
*
* @author David Ostrovsky
* @since 1.6.0
*/
public class ProxyFilter extends DaggerFilter {
private List<HttpRequestFilter> filters;
@Override
protected void inject(ObjectGraph dagger, FilterConfig filterConfig) throws ServletException {
IRuntimeManager runtimeManager = dagger.get(IRuntimeManager.class);
IPluginManager pluginManager = dagger.get(IPluginManager.class);
filters = pluginManager.getExtensions(HttpRequestFilter.class);
for (HttpRequestFilter f : filters) {
// wrap the filter config for Gitblit settings retrieval
PluginWrapper pluginWrapper = pluginManager.whichPlugin(f.getClass());
FilterConfig runtimeConfig = new FilterRuntimeConfig(runtimeManager,
pluginWrapper.getPluginId(), filterConfig);
f.init(runtimeConfig);
}
}
@Override
public void doFilter(ServletRequest req, ServletResponse res, final FilterChain last)
throws IOException, ServletException {
final Iterator<HttpRequestFilter> itr = filters.iterator();
new FilterChain() {
@Override
public void doFilter(ServletRequest req, ServletResponse res) throws IOException,
ServletException {
if (itr.hasNext()) {
itr.next().doFilter(req, res, this);
} else {
last.doFilter(req, res);
}
}
}.doFilter(req, res);
}
@Override
public void destroy() {
for (HttpRequestFilter f : filters) {
f.destroy();
}
}
}