org.jasig.portlet.calendar.adapter.exchange.NtlmAuthHttpClient.java Source code

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Here is the source code for org.jasig.portlet.calendar.adapter.exchange.NtlmAuthHttpClient.java

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/**
 * Licensed to Apereo under one or more contributor license
 * agreements. See the NOTICE file distributed with this work
 * for additional information regarding copyright ownership.
 * Apereo licenses this file to you 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 the following location:
 *
 *   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 org.jasig.portlet.calendar.adapter.exchange;

import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.http.HttpEntityEnclosingRequest;
import org.apache.http.HttpException;
import org.apache.http.HttpRequest;
import org.apache.http.HttpRequestInterceptor;
import org.apache.http.auth.AuthScheme;
import org.apache.http.auth.AuthSchemeFactory;
import org.apache.http.client.params.AuthPolicy;
import org.apache.http.conn.ClientConnectionManager;
import org.apache.http.impl.auth.BasicSchemeFactory;
import org.apache.http.impl.auth.NTLMScheme;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.params.HttpParams;
import org.apache.http.protocol.HTTP;
import org.apache.http.protocol.HttpContext;
import org.springframework.beans.factory.InitializingBean;

public class NtlmAuthHttpClient extends DefaultHttpClient implements InitializingBean {

    private Map<String, AuthSchemeFactory> authenticationSchemes = null;

    private final Log log = LogFactory.getLog(this.getClass());

    public NtlmAuthHttpClient() {
    }

    public NtlmAuthHttpClient(final ClientConnectionManager conman) {
        super(conman);
    }

    public NtlmAuthHttpClient(final ClientConnectionManager conman, final HttpParams params) {
        super(conman, params);
    }

    public NtlmAuthHttpClient(final HttpParams params) {
        super(params);
    }

    public void setAuthenticationSchemes(final Map<String, AuthSchemeFactory> authenticationSchemes) {
        this.authenticationSchemes = authenticationSchemes;
    }

    @Override
    public void afterPropertiesSet() throws Exception {
        if (authenticationSchemes == null) {
            authenticationSchemes = new HashMap<String, AuthSchemeFactory>();
            final AuthSchemeFactory fac = new NTLMSchemeFactory();
            final AuthSchemeFactory bfac = new BasicSchemeFactory();
            authenticationSchemes.put(AuthPolicy.BASIC, bfac);
            authenticationSchemes.put(AuthPolicy.NTLM, fac);
            authenticationSchemes.put(AuthPolicy.SPNEGO, fac);
        }
        setup();
        if (log.isDebugEnabled()) {
            log.debug("Support is available for the following authenticationSchemes="
                    + authenticationSchemes.keySet());
        }
    }

    private void setup() {
        addRequestInterceptor(new RemoveSoapHeadersInterceptor(), 0);
        for (Map.Entry<String, AuthSchemeFactory> y : authenticationSchemes.entrySet()) {
            getAuthSchemes().register(y.getKey(), y.getValue());
        }
    }

    /**
     * HttpClient {@link org.apache.http.HttpRequestInterceptor} implementation that removes {@code Content-Length} and
     * {@code Transfer-Encoding} headers from the request. Necessary, because SAAJ and other SOAP implementations set these
     * headers themselves, and HttpClient throws an exception if they have been set.
     */
    private static final class RemoveSoapHeadersInterceptor implements HttpRequestInterceptor {

        @Override
        public void process(final HttpRequest request, final HttpContext context)
                throws HttpException, IOException {
            if (request instanceof HttpEntityEnclosingRequest) {
                if (request.containsHeader(HTTP.TRANSFER_ENCODING)) {
                    request.removeHeaders(HTTP.TRANSFER_ENCODING);
                }
                if (request.containsHeader(HTTP.CONTENT_LEN)) {
                    request.removeHeaders(HTTP.CONTENT_LEN);
                }
            }
        }

    }

    private static final class NTLMSchemeFactory implements AuthSchemeFactory {

        @Override
        public AuthScheme newInstance(final HttpParams params) {
            return new NTLMScheme(new JCIFSEngine());
        }

    }

}