com.eucalyptus.ws.server.QueryPipeline.java Source code

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Here is the source code for com.eucalyptus.ws.server.QueryPipeline.java

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/*************************************************************************
 * Copyright 2009-2013 Eucalyptus Systems, Inc.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 3 of the License.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see http://www.gnu.org/licenses/.
 *
 * Please contact Eucalyptus Systems, Inc., 6755 Hollister Ave., Goleta
 * CA 93117, USA or visit http://www.eucalyptus.com/licenses/ if you need
 * additional information or have any questions.
 ************************************************************************/
package com.eucalyptus.ws.server;

import static com.eucalyptus.auth.principal.TemporaryAccessKey.TemporaryKeyType;
import java.util.EnumSet;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
import org.apache.commons.codec.DecoderException;
import org.apache.commons.codec.net.URLCodec;
import org.jboss.netty.buffer.ChannelBuffer;
import org.jboss.netty.channel.ChannelPipeline;
import org.jboss.netty.handler.codec.http.HttpHeaders;
import org.jboss.netty.handler.codec.http.HttpMethod;
import org.jboss.netty.handler.codec.http.HttpRequest;
import com.eucalyptus.http.MappingHttpRequest;
import com.eucalyptus.util.CollectionUtils;
import com.eucalyptus.util.Strings;
import com.eucalyptus.ws.protocol.RequiredQueryParams;
import com.eucalyptus.ws.stages.HmacUserAuthenticationStage;
import com.eucalyptus.ws.stages.UnrollableStage;
import com.google.common.base.Predicates;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Iterables;
import com.google.common.collect.Sets;

/**
 *
 */
public abstract class QueryPipeline extends FilteredPipeline {
    private final HmacUserAuthenticationStage auth;
    private final String name;
    private final Set<String> servicePathPrefixes;
    private final Set<RequiredQueryParams> requiredQueryParams;

    protected QueryPipeline(final String name, final String servicePathPrefix,
            final Set<TemporaryKeyType> allowedTemporaryCredentials) {
        this(name, ImmutableSet.of(servicePathPrefix), allowedTemporaryCredentials,
                EnumSet.allOf(RequiredQueryParams.class));
    }

    protected QueryPipeline(final String name, final String servicePathPrefix,
            final Set<TemporaryKeyType> allowedTemporaryCredentials,
            final Set<RequiredQueryParams> requiredQueryParams) {
        this(name, ImmutableSet.of(servicePathPrefix), allowedTemporaryCredentials, requiredQueryParams);
    }

    protected QueryPipeline(final String name, final Set<String> servicePathPrefixes,
            final Set<TemporaryKeyType> allowedTemporaryCredentials,
            final Set<RequiredQueryParams> requiredQueryParams) {
        this.auth = new HmacUserAuthenticationStage(allowedTemporaryCredentials);
        this.name = name;
        this.servicePathPrefixes = ImmutableSet.copyOf(servicePathPrefixes);
        this.requiredQueryParams = ImmutableSet.copyOf(requiredQueryParams);
    }

    protected UnrollableStage getAuthenticationStage() {
        return auth;
    }

    @Override
    public ChannelPipeline addHandlers(final ChannelPipeline pipeline) {
        getAuthenticationStage().unrollStage(pipeline);
        return null;
    }

    @Override
    public boolean checkAccepts(final HttpRequest message) {
        if (message instanceof MappingHttpRequest) {
            MappingHttpRequest httpRequest = (MappingHttpRequest) message;
            if (httpRequest.getMethod().equals(HttpMethod.POST)) {
                Map<String, String> parameters = new HashMap<String, String>(httpRequest.getParameters());
                Set<String> nonQueryParameters = Sets.newHashSet();
                ChannelBuffer buffer = httpRequest.getContent();
                buffer.markReaderIndex();
                byte[] read = new byte[buffer.readableBytes()];
                buffer.readBytes(read);
                String query = new String(read);
                buffer.resetReaderIndex();
                for (String p : query.split("&")) {
                    String[] splitParam = p.split("=");
                    String lhs = splitParam[0];
                    String rhs = splitParam.length == 2 ? splitParam[1] : null;
                    try {
                        if (lhs != null)
                            lhs = new URLCodec().decode(lhs);
                    } catch (DecoderException e) {
                    }
                    try {
                        if (rhs != null)
                            rhs = new URLCodec().decode(rhs);
                    } catch (DecoderException e) {
                    }
                    parameters.put(lhs, rhs);
                    nonQueryParameters.add(lhs);
                }
                for (RequiredQueryParams p : requiredQueryParams) {
                    if (!parameters.containsKey(p.toString())) {
                        return false;
                    }
                }
                httpRequest.getParameters().putAll(parameters);
                httpRequest.addNonQueryParameterKeys(nonQueryParameters);
            } else {
                for (RequiredQueryParams p : requiredQueryParams) {
                    if (!httpRequest.getParameters().containsKey(p.toString())) {
                        return false;
                    }
                }
            }
            final boolean usesServicePath = Iterables.any(servicePathPrefixes,
                    Strings.isPrefixOf(message.getUri()));
            final boolean noPath = message.getUri().isEmpty() || message.getUri().equals("/")
                    || message.getUri().startsWith("/?");
            return usesServicePath || (noPath && resolvesByHost(message.getHeader(HttpHeaders.Names.HOST)));
        }
        return false;
    }

    @Override
    public String getName() {
        return name;
    }
}