TransportGitAnon.java

  1. /*
  2.  * Copyright (C) 2008, Marek Zawirski <marek.zawirski@gmail.com>
  3.  * Copyright (C) 2008, Robin Rosenberg <robin.rosenberg@dewire.com>
  4.  * Copyright (C) 2008, Shawn O. Pearce <spearce@spearce.org>
  5.  * and other copyright owners as documented in the project's IP log.
  6.  *
  7.  * This program and the accompanying materials are made available
  8.  * under the terms of the Eclipse Distribution License v1.0 which
  9.  * accompanies this distribution, is reproduced below, and is
  10.  * available at http://www.eclipse.org/org/documents/edl-v10.php
  11.  *
  12.  * All rights reserved.
  13.  *
  14.  * Redistribution and use in source and binary forms, with or
  15.  * without modification, are permitted provided that the following
  16.  * conditions are met:
  17.  *
  18.  * - Redistributions of source code must retain the above copyright
  19.  *   notice, this list of conditions and the following disclaimer.
  20.  *
  21.  * - Redistributions in binary form must reproduce the above
  22.  *   copyright notice, this list of conditions and the following
  23.  *   disclaimer in the documentation and/or other materials provided
  24.  *   with the distribution.
  25.  *
  26.  * - Neither the name of the Eclipse Foundation, Inc. nor the
  27.  *   names of its contributors may be used to endorse or promote
  28.  *   products derived from this software without specific prior
  29.  *   written permission.
  30.  *
  31.  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
  32.  * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
  33.  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  34.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  35.  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  36.  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  37.  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  38.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  39.  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  40.  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  41.  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  42.  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  43.  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  44.  */

  46. package org.eclipse.jgit.transport;

  48. import java.io.BufferedInputStream;
  49. import java.io.BufferedOutputStream;
  50. import java.io.IOException;
  51. import java.io.InputStream;
  52. import java.io.OutputStream;
  53. import java.net.ConnectException;
  54. import java.net.InetAddress;
  55. import java.net.InetSocketAddress;
  56. import java.net.Socket;
  57. import java.net.UnknownHostException;
  58. import java.util.Collections;
  59. import java.util.EnumSet;
  60. import java.util.Set;

  62. import org.eclipse.jgit.errors.NotSupportedException;
  63. import org.eclipse.jgit.errors.TransportException;
  64. import org.eclipse.jgit.internal.JGitText;
  65. import org.eclipse.jgit.lib.Repository;

  67. /**
  68.  * Transport through a git-daemon waiting for anonymous TCP connections.
  69.  * <p>
  70.  * This transport supports the <code>git://</code> protocol, usually run on
  71.  * the IANA registered port 9418. It is a popular means for distributing open
  72.  * source projects, as there are no authentication or authorization overheads.
  73.  */
  74. class TransportGitAnon extends TcpTransport implements PackTransport {
  75.     static final int GIT_PORT = Daemon.DEFAULT_PORT;

  77.     static final TransportProtocol PROTO_GIT = new TransportProtocol() {
  78.         @Override
  79.         public String getName() {
  80.             return JGitText.get().transportProtoGitAnon;
  81.         }

  83.         @Override
  84.         public Set<String> getSchemes() {
  85.             return Collections.singleton("git"); //$NON-NLS-1$
  86.         }

  88.         @Override
  89.         public Set<URIishField> getRequiredFields() {
  90.             return Collections.unmodifiableSet(EnumSet.of(URIishField.HOST,
  91.                     URIishField.PATH));
  92.         }

  94.         @Override
  95.         public Set<URIishField> getOptionalFields() {
  96.             return Collections.unmodifiableSet(EnumSet.of(URIishField.PORT));
  97.         }

  99.         @Override
  100.         public int getDefaultPort() {
  101.             return GIT_PORT;
  102.         }

  104.         @Override
  105.         public Transport open(URIish uri, Repository local, String remoteName)
  106.                 throws NotSupportedException {
  107.             return new TransportGitAnon(local, uri);
  108.         }

  110.         @Override
  111.         public Transport open(URIish uri) throws NotSupportedException, TransportException {
  112.             return new TransportGitAnon(uri);
  113.         }
  114.     };

  116.     TransportGitAnon(Repository local, URIish uri) {
  117.         super(local, uri);
  118.     }

  120.     TransportGitAnon(URIish uri) {
  121.         super(uri);
  122.     }

  124.     /** {@inheritDoc} */
  125.     @Override
  126.     public FetchConnection openFetch() throws TransportException {
  127.         return new TcpFetchConnection();
  128.     }

  130.     /** {@inheritDoc} */
  131.     @Override
  132.     public PushConnection openPush() throws TransportException {
  133.         return new TcpPushConnection();
  134.     }

  136.     /** {@inheritDoc} */
  137.     @Override
  138.     public void close() {
  139.         // Resources must be established per-connection.
  140.     }

  142.     Socket openConnection() throws TransportException {
  143.         final int tms = getTimeout() > 0 ? getTimeout() * 1000 : 0;
  144.         final int port = uri.getPort() > 0 ? uri.getPort() : GIT_PORT;
  145.         @SuppressWarnings("resource") // Closed by the caller
  146.         final Socket s = new Socket();
  147.         try {
  148.             final InetAddress host = InetAddress.getByName(uri.getHost());
  149.             s.bind(null);
  150.             s.connect(new InetSocketAddress(host, port), tms);
  151.         } catch (IOException c) {
  152.             try {
  153.                 s.close();
  154.             } catch (IOException closeErr) {
  155.                 // ignore a failure during close, we're already failing
  156.             }
  157.             if (c instanceof UnknownHostException)
  158.                 throw new TransportException(uri, JGitText.get().unknownHost);
  159.             if (c instanceof ConnectException)
  160.                 throw new TransportException(uri, c.getMessage());
  161.             throw new TransportException(uri, c.getMessage(), c);
  162.         }
  163.         return s;
  164.     }

  166.     void service(String name, PacketLineOut pckOut)
  167.             throws IOException {
  168.         final StringBuilder cmd = new StringBuilder();
  169.         cmd.append(name);
  170.         cmd.append(' ');
  171.         cmd.append(uri.getPath());
  172.         cmd.append('\0');
  173.         cmd.append("host="); //$NON-NLS-1$
  174.         cmd.append(uri.getHost());
  175.         if (uri.getPort() > 0 && uri.getPort() != GIT_PORT) {
  176.             cmd.append(":"); //$NON-NLS-1$
  177.             cmd.append(uri.getPort());
  178.         }
  179.         cmd.append('\0');
  180.         pckOut.writeString(cmd.toString());
  181.         pckOut.flush();
  182.     }

  184.     class TcpFetchConnection extends BasePackFetchConnection {
  185.         private Socket sock;

  187.         TcpFetchConnection() throws TransportException {
  188.             super(TransportGitAnon.this);
  189.             sock = openConnection();
  190.             try {
  191.                 InputStream sIn = sock.getInputStream();
  192.                 OutputStream sOut = sock.getOutputStream();

  194.                 sIn = new BufferedInputStream(sIn);
  195.                 sOut = new BufferedOutputStream(sOut);

  197.                 init(sIn, sOut);
  198.                 service("git-upload-pack", pckOut); //$NON-NLS-1$
  199.             } catch (IOException err) {
  200.                 close();
  201.                 throw new TransportException(uri,
  202.                         JGitText.get().remoteHungUpUnexpectedly, err);
  203.             }
  204.             readAdvertisedRefs();
  205.         }

  207.         @Override
  208.         public void close() {
  209.             super.close();

  211.             if (sock != null) {
  212.                 try {
  213.                     sock.close();
  214.                 } catch (IOException err) {
  215.                     // Ignore errors during close.
  216.                 } finally {
  217.                     sock = null;
  218.                 }
  219.             }
  220.         }
  221.     }

  223.     class TcpPushConnection extends BasePackPushConnection {
  224.         private Socket sock;

  226.         TcpPushConnection() throws TransportException {
  227.             super(TransportGitAnon.this);
  228.             sock = openConnection();
  229.             try {
  230.                 InputStream sIn = sock.getInputStream();
  231.                 OutputStream sOut = sock.getOutputStream();

  233.                 sIn = new BufferedInputStream(sIn);
  234.                 sOut = new BufferedOutputStream(sOut);

  236.                 init(sIn, sOut);
  237.                 service("git-receive-pack", pckOut); //$NON-NLS-1$
  238.             } catch (IOException err) {
  239.                 close();
  240.                 throw new TransportException(uri,
  241.                         JGitText.get().remoteHungUpUnexpectedly, err);
  242.             }
  243.             readAdvertisedRefs();
  244.         }

  246.         @Override
  247.         public void close() {
  248.             super.close();

  250.             if (sock != null) {
  251.                 try {
  252.                     sock.close();
  253.                 } catch (IOException err) {
  254.                     // Ignore errors during close.
  255.                 } finally {
  256.                     sock = null;
  257.                 }
  258.             }
  259.         }
  260.     }
  261. }
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