/*
    * Copyright (C) 2009-2010, Google Inc. and others
    *
    * This program and the accompanying materials are made available under the
    * terms of the Eclipse Distribution License v. 1.0 which is available at
    * https://www.eclipse.org/org/documents/edl-v10.php.
    *
    * SPDX-License-Identifier: BSD-3-Clause
    */
  
  package org.eclipse.jgit.http.server;
  
  import static java.nio.charset.StandardCharsets.UTF_8;
  import static org.eclipse.jgit.http.server.ServletUtils.getRepository;
  
  import java.io.IOException;
  import java.io.OutputStreamWriter;
  
  import javax.servlet.http.HttpServlet;
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  
  import org.eclipse.jgit.lib.Constants;
  import org.eclipse.jgit.lib.Repository;
  import org.eclipse.jgit.transport.RefAdvertiser;
  import org.eclipse.jgit.util.HttpSupport;
  
  /** Send a complete list of current refs, including peeled values for tags. */
  class InfoRefsServlet extends HttpServlet {
  	private static final long serialVersionUID = 1L;
  
  	/** {@inheritDoc} */
  	@Override
  	public void doGet(final HttpServletRequest req,
  			final HttpServletResponse rsp) throws IOException {
  		// Assume a dumb client and send back the dumb client
  		// version of the info/refs file.
  		rsp.setContentType(HttpSupport.TEXT_PLAIN);
  		rsp.setCharacterEncoding(UTF_8.name());
  
  		final Repository db = getRepository(req);
  		try (OutputStreamWriter out = new OutputStreamWriter(
  				new SmartOutputStream(req, rsp, true),
  				UTF_8)) {
  			final RefAdvertiser adv = new RefAdvertiser() {
  				@Override
  				protected void writeOne(CharSequence line)
  						throws IOException {
  					// Whoever decided that info/refs should use a different
  					// delimiter than the native git:// protocol shouldn't
  					// be allowed to design this sort of stuff. :-(
  					out.append(line.toString().replace(' ', '\t'));
  				}
  
  				@Override
  				protected void end() {
  					// No end marker required for info/refs format.
  				}
  			};
  			adv.init(db);
  			adv.setDerefTags(true);
  			adv.send(db.getRefDatabase().getRefsByPrefix(Constants.R_REFS));
  		}
  	}
  }