/
HttpIncomingTransport.java
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/
HttpIncomingTransport.java
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/**
* Licensed to JumpMind Inc under one or more contributor
* license agreements. See the NOTICE file distributed
* with this work for additional information regarding
* copyright ownership. JumpMind Inc licenses this file
* to you under the GNU General Public License, version 3.0 (GPLv3)
* (the "License"); you may not use this file except in compliance
* with the License.
*
* You should have received a copy of the GNU General Public License,
* version 3.0 (GPLv3) along with this library; if not, see
* <http://www.gnu.org/licenses/>.
*
* 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.jumpmind.symmetric.transport.http;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.LinkedHashMap;
import java.util.Map;
import org.jumpmind.exception.HttpException;
import org.jumpmind.symmetric.common.ParameterConstants;
import org.jumpmind.symmetric.service.IParameterService;
import org.jumpmind.symmetric.service.RegistrationNotOpenException;
import org.jumpmind.symmetric.service.RegistrationRequiredException;
import org.jumpmind.symmetric.transport.AuthenticationException;
import org.jumpmind.symmetric.transport.ConnectionRejectedException;
import org.jumpmind.symmetric.transport.IIncomingTransport;
import org.jumpmind.symmetric.transport.NoContentException;
import org.jumpmind.symmetric.transport.ServiceUnavailableException;
import org.jumpmind.symmetric.transport.SyncDisabledException;
import org.jumpmind.symmetric.transport.TransportUtils;
import org.jumpmind.symmetric.web.WebConstants;
public class HttpIncomingTransport implements IIncomingTransport {
private HttpURLConnection connection;
private BufferedReader reader;
private InputStream is;
private IParameterService parameterService;
private int httpTimeout;
private String redirectionUrl;
private String nodeId;
private String securityToken;
public HttpIncomingTransport(HttpURLConnection connection, IParameterService parameterService) {
this.connection = connection;
this.parameterService = parameterService;
this.httpTimeout = parameterService.getInt(ParameterConstants.TRANSPORT_HTTP_TIMEOUT);
}
public HttpIncomingTransport(HttpURLConnection connection, IParameterService parameterService, String nodeId, String securityToken) {
this(connection, parameterService);
this.nodeId = nodeId;
this.securityToken = securityToken;
}
@Override
public String getUrl() {
return this.connection.getURL().toExternalForm();
}
@Override
public void close() {
if (reader != null) {
try {
reader.close();
} catch (IOException e) {
}
reader = null;
}
if (is != null) {
try {
is.close();
} catch (IOException e) {
}
is = null;
}
}
@Override
public boolean isOpen() {
return reader != null;
}
@Override
public String getRedirectionUrl() {
return redirectionUrl;
}
@Override
public InputStream openStream() throws IOException {
boolean manualRedirects = parameterService.is(ParameterConstants.TRANSPORT_HTTP_MANUAL_REDIRECTS_ENABLED, true);
if (manualRedirects) {
connection = this.openConnectionCheckRedirects(connection);
}
int code = connection.getResponseCode();
switch (code) {
case WebConstants.REGISTRATION_NOT_OPEN:
throw new RegistrationNotOpenException();
case WebConstants.REGISTRATION_REQUIRED:
throw new RegistrationRequiredException();
case WebConstants.SYNC_DISABLED:
throw new SyncDisabledException();
case WebConstants.SC_SERVICE_BUSY:
throw new ConnectionRejectedException();
case WebConstants.SC_SERVICE_UNAVAILABLE:
throw new ServiceUnavailableException();
case WebConstants.SC_FORBIDDEN:
HttpTransportManager.clearSession(connection);
throw new AuthenticationException();
case WebConstants.SC_AUTH_EXPIRED:
HttpTransportManager.clearSession(connection);
throw new AuthenticationException(true);
case WebConstants.SC_NO_CONTENT:
throw new NoContentException();
case WebConstants.SC_OK:
is = HttpTransportManager.getInputStreamFrom(connection);
return is;
default:
throw new HttpException(code, "Received an unexpected response code of " + code + " from the server");
}
}
@Override
public BufferedReader openReader() throws IOException {
InputStream stream = openStream();
reader = TransportUtils.toReader(stream);
return reader;
}
@Override
public Map<String, String> getHeaders() {
Map<String, String> headers = new LinkedHashMap<String, String>();
for (String name : connection.getHeaderFields().keySet()) {
if (name != null) {
headers.put(name, connection.getHeaderField(name));
}
}
return headers;
}
/**
* This method support redirection from an http connection to an https connection.
* See {@link http://java.sun.com/j2se/1.4.2/docs/guide/deployment/deployment-guide/upgrade-guide/article-17.html}
* for more information.
*
* @param connection
* @return
* @throws IOException
*/
private HttpURLConnection openConnectionCheckRedirects(HttpURLConnection connection) throws IOException
{
boolean redir;
int redirects = 0;
do {
connection.setInstanceFollowRedirects(false);
redir = false;
int stat = connection.getResponseCode();
if (stat >= 300 && stat <= 307 && stat != 306 && stat != HttpURLConnection.HTTP_NOT_MODIFIED) {
URL base = connection.getURL();
redirectionUrl = connection.getHeaderField("Location");
URL target = null;
if (redirectionUrl != null) {
target = new URL(base, redirectionUrl);
}
connection.disconnect();
// Redirection should be allowed only for HTTP and HTTPS
// and should be limited to 5 redirections at most.
if (target == null || !(target.getProtocol().equals("http")
|| target.getProtocol().equals("https"))
|| redirects >= 5) {
throw new SecurityException("illegal URL redirect");
}
redir = true;
connection = HttpTransportManager.openConnection(target, nodeId, securityToken);
connection.setConnectTimeout(httpTimeout);
connection.setReadTimeout(httpTimeout);
redirects++;
}
} while (redir);
return connection;
}
public HttpURLConnection getConnection() {
return connection;
}
}