com.coroptis.coidi.rp.services.impl.DiscoveryProcessorYadis.java Source code

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Here is the source code for com.coroptis.coidi.rp.services.impl.DiscoveryProcessorYadis.java

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/**
 * Copyright 2012 coroptis.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.coroptis.coidi.rp.services.impl;

import java.io.IOException;
import java.net.ConnectException;

import javax.servlet.http.HttpServletResponse;

import org.apache.http.Header;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpHead;
import org.apache.http.util.EntityUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.coroptis.coidi.rp.base.DiscoveryResult;
import com.coroptis.coidi.rp.services.AuthenticationProcessException;
import com.coroptis.coidi.rp.services.DiscoveryProcessor;
import com.coroptis.coidi.rp.services.DiscoverySupport;
import com.coroptis.coidi.rp.services.HttpService;
import com.coroptis.coidi.rp.services.XmlProcessing;
import com.coroptis.coidi.rp.services.XrdsService;
import com.google.common.base.Preconditions;

/**
 * Yadis.
 * 
 * @author jan
 * 
 */
public class DiscoveryProcessorYadis implements DiscoveryProcessor {

    private final static Logger logger = LoggerFactory.getLogger(DiscoveryProcessorYadis.class);

    private final HttpService httpService;

    private final XrdsService xrdsService;

    private final XmlProcessing xmlProcessing;

    private final DiscoverySupport discoverySupport;

    public DiscoveryProcessorYadis(final HttpService httpService, final XrdsService xrdsService,
            final XmlProcessing xmlProcessing, final DiscoverySupport discoverySupport) {
        this.httpService = Preconditions.checkNotNull(httpService);
        this.xrdsService = Preconditions.checkNotNull(xrdsService);
        this.xmlProcessing = Preconditions.checkNotNull(xmlProcessing);
        this.discoverySupport = Preconditions.checkNotNull(discoverySupport);
    }

    private DiscoveryResult doHead(String userSuppliedId) throws ClientProtocolException, IOException {
        logger.debug("trying HEAD at '" + userSuppliedId + "'");
        HttpClient httpClient = httpService.getHttpClient();
        HttpHead httpHead = new HttpHead(userSuppliedId);
        httpHead.setHeader("Accept", "application/xrds+xml");
        HttpResponse response = httpClient.execute(httpHead);
        if (HttpServletResponse.SC_OK == response.getStatusLine().getStatusCode()) {
            Header header = response.getFirstHeader("X-XRDS-Location");
            if (header == null) {
                return doGet(userSuppliedId);
            } else {
                return discoverySupport.getXrdsDocument(header.getValue(), userSuppliedId);
            }
        } else {
            logger.info("OpendID provider response for YADIS HEAD request is:" + response.toString());
            return null;
        }
    }

    private boolean isContentType(Header headerContentType) {
        if (headerContentType == null) {
            return false;
        } else {
            return headerContentType.getValue().indexOf("application/xrds+xml") >= 0;
        }
    }

    private DiscoveryResult doGet(String userSuppliedId) throws ClientProtocolException, IOException {
        logger.debug("trying GET at '" + userSuppliedId + "'");
        HttpGet httpget = new HttpGet(userSuppliedId);
        httpget.setHeader("Accept", "application/xrds+xml");
        HttpResponse response = httpService.getHttpClient().execute(httpget);
        Header headerXrdsLocation = response.getFirstHeader("X-XRDS-Location");
        if (headerXrdsLocation == null) {
            Header headerContentType = response.getFirstHeader("Content-Type");
            String body = EntityUtils.toString(response.getEntity());
            if (isContentType(headerContentType)) {
                // it's XRDS document
                DiscoveryResult out = xrdsService.extractDiscoveryResult(body);
                out.setClaimedId(userSuppliedId);
                return out;
            } else {
                // try if it's HTML with meta
                String meta = xmlProcessing.getMetaContent(body, "X-XRDS-Location");
                if (meta == null) {
                    throw new AuthenticationProcessException("Unable to find XRDS document.");
                } else {
                    return discoverySupport.getXrdsDocument(meta, userSuppliedId);
                }
            }
        } else {
            return discoverySupport.getXrdsDocument(headerXrdsLocation.getValue(), userSuppliedId);
        }
    }

    @Override
    public DiscoveryResult dicovery(String userSuppliedId) {
        Preconditions.checkNotNull(userSuppliedId, "userSuppliedId");
        userSuppliedId = userSuppliedId.trim();
        try {
            return doHead(userSuppliedId);
        } catch (IllegalArgumentException e) {
            logger.error(e.getMessage(), e);
            throw new AuthenticationProcessException("Invalid format of you identificator");
        } catch (ClientProtocolException e) {
            logger.error(e.getMessage(), e);
            throw new AuthenticationProcessException(
                    "There is problem to get XRDS document, check your identificator");
        } catch (ConnectException e) {
            logger.error(e.getMessage(), e);
            throw new AuthenticationProcessException(
                    "Unable to connect to OpenID provider, check your identificator");
        } catch (IOException e) {
            logger.error(e.getMessage(), e);
            throw new AuthenticationProcessException(
                    "There is problem to get XRDS document, check your identificator");
        }
    }

}