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added proxy servlet

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This commit is contained in:
Sebastian Sdorra
2011-09-13 16:29:58 +02:00
parent 2a9c9683d1
commit e7459d7847
3 changed files with 326 additions and 0 deletions
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77
scm-core/src/main/java/sonia/scm/web/proxy/BasicProxyURLProvider.java Normal file
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/**
* Copyright (c) 2010, Sebastian Sdorra
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. Neither the name of SCM-Manager; nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* http://bitbucket.org/sdorra/scm-manager
*
*/
package sonia.scm.web.proxy;
//~--- JDK imports ------------------------------------------------------------
import java.net.URL;
/**
*
* @author Sebastian Sdorra
* @since 1.8
*/
public class BasicProxyURLProvider implements ProxyURLProvider
{
/**
* Constructs ...
*
*
* @param url
*/
public BasicProxyURLProvider(URL url)
{
this.url = url;
}
//~--- get methods ----------------------------------------------------------
/**
* Method description
*
*
* @return
*/
@Override
public URL getProxyURL()
{
return url;
}
//~--- fields ---------------------------------------------------------------
/** Field description */
private URL url;
}

194
scm-core/src/main/java/sonia/scm/web/proxy/ProxyServet.java Normal file
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/**
* Copyright (c) 2010, Sebastian Sdorra
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. Neither the name of SCM-Manager; nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* http://bitbucket.org/sdorra/scm-manager
*
*/
package sonia.scm.web.proxy;
//~--- non-JDK imports --------------------------------------------------------
import com.google.inject.Singleton;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import sonia.scm.util.AssertUtil;
import sonia.scm.util.IOUtil;
//~--- JDK imports ------------------------------------------------------------
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.Enumeration;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
*
* @author Sebastian Sdorra
* @since 1.8
*/
@Singleton
public class ProxyServet extends HttpServlet
{
/** the logger for MyProxy */
private static final Logger logger =
LoggerFactory.getLogger(ProxyServet.class);
//~--- constructors ---------------------------------------------------------
/**
* Constructs ...
*
*
* @param urlProvider
*/
public ProxyServet(ProxyURLProvider urlProvider)
{
this.urlProvider = urlProvider;
}
/**
* Constructs ...
*
*
* @param url
*/
public ProxyServet(URL url)
{
this.urlProvider = new BasicProxyURLProvider(url);
}
//~--- methods --------------------------------------------------------------
/**
* Method description
*
*
* @param request
* @param response
*/
@Override
public void doGet(HttpServletRequest request, HttpServletResponse response)
{
doPost(request, response);
}
/**
* Method description
*
*
* @param request
* @param response
*/
@Override
public void doPost(HttpServletRequest request, HttpServletResponse response)
{
BufferedInputStream webToProxyBuf = null;
BufferedOutputStream proxyToClientBuf = null;
HttpURLConnection con;
try
{
URL url = urlProvider.getProxyURL();
AssertUtil.assertIsNotNull(url);
if (logger.isInfoEnabled())
{
logger.info("proxy request for {}", url.toString());
}
con = (HttpURLConnection) url.openConnection();
con.setDoOutput(true);
con.setDoInput(true);
con.setUseCaches(true);
for (Enumeration e = request.getHeaderNames(); e.hasMoreElements(); )
{
String headerName = e.nextElement().toString();
con.setRequestProperty(headerName, request.getHeader(headerName));
}
con.connect();
response.setStatus(con.getResponseCode());
for (Iterator i = con.getHeaderFields().entrySet().iterator();
i.hasNext(); )
{
Map.Entry mapEntry = (Map.Entry) i.next();
if (mapEntry.getKey() != null)
{
response.setHeader(mapEntry.getKey().toString(),
((List) mapEntry.getValue()).get(0).toString());
}
}
webToProxyBuf = new BufferedInputStream(con.getInputStream());
proxyToClientBuf = new BufferedOutputStream(response.getOutputStream());
int oneByte;
while ((oneByte = webToProxyBuf.read()) != -1)
{
proxyToClientBuf.write(oneByte);
}
con.disconnect();
}
catch (Exception ex)
{
logger.error("could not proxy request", ex);
}
finally
{
IOUtil.close(webToProxyBuf);
IOUtil.close(proxyToClientBuf);
}
}
//~--- fields ---------------------------------------------------------------
/** Field description */
private ProxyURLProvider urlProvider;
}

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scm-core/src/main/java/sonia/scm/web/proxy/ProxyURLProvider.java Normal file
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/**
* Copyright (c) 2010, Sebastian Sdorra
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. Neither the name of SCM-Manager; nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* http://bitbucket.org/sdorra/scm-manager
*
*/
package sonia.scm.web.proxy;
//~--- JDK imports ------------------------------------------------------------
import java.net.URL;
/**
*
* @author Sebastian Sdorra
* @since 1.8
*/
public interface ProxyURLProvider
{
/**
* Method description
*
*
* @return
*/
public URL getProxyURL();
}