org.openrewrite.jgit.transport.TransportGitAnon Maven / Gradle / Ivy
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/*
* Copyright (C) 2008, Marek Zawirski
* Copyright (C) 2008, Robin Rosenberg
* Copyright (C) 2008, 2020 Shawn O. Pearce 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.openrewrite.jgit.transport;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.ConnectException;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.net.UnknownHostException;
import java.util.Collection;
import java.util.Collections;
import java.util.EnumSet;
import java.util.Set;
import org.openrewrite.jgit.errors.NotSupportedException;
import org.openrewrite.jgit.errors.TransportException;
import org.openrewrite.jgit.internal.JGitText;
import org.openrewrite.jgit.lib.Repository;
/**
* Transport through a git-daemon waiting for anonymous TCP connections.
*
* This transport supports the git:// protocol, usually run on
* the IANA registered port 9418. It is a popular means for distributing open
* source projects, as there are no authentication or authorization overheads.
*/
class TransportGitAnon extends TcpTransport implements PackTransport {
static final int GIT_PORT = Daemon.DEFAULT_PORT;
static final TransportProtocol PROTO_GIT = new TransportProtocol() {
@Override
public String getName() {
return JGitText.get().transportProtoGitAnon;
}
@Override
public Set getSchemes() {
return Collections.singleton("git"); //$NON-NLS-1$
}
@Override
public Set getRequiredFields() {
return Collections.unmodifiableSet(EnumSet.of(URIishField.HOST,
URIishField.PATH));
}
@Override
public Set getOptionalFields() {
return Collections.unmodifiableSet(EnumSet.of(URIishField.PORT));
}
@Override
public int getDefaultPort() {
return GIT_PORT;
}
@Override
public Transport open(URIish uri, Repository local, String remoteName)
throws NotSupportedException {
return new TransportGitAnon(local, uri);
}
@Override
public Transport open(URIish uri) throws NotSupportedException, TransportException {
return new TransportGitAnon(uri);
}
};
TransportGitAnon(Repository local, URIish uri) {
super(local, uri);
}
TransportGitAnon(URIish uri) {
super(uri);
}
/** {@inheritDoc} */
@Override
public FetchConnection openFetch() throws TransportException {
return new TcpFetchConnection();
}
@Override
public FetchConnection openFetch(Collection refSpecs,
String... additionalPatterns)
throws NotSupportedException, TransportException {
return new TcpFetchConnection(refSpecs, additionalPatterns);
}
/** {@inheritDoc} */
@Override
public PushConnection openPush() throws TransportException {
return new TcpPushConnection();
}
/** {@inheritDoc} */
@Override
public void close() {
// Resources must be established per-connection.
}
Socket openConnection() throws TransportException {
final int tms = getTimeout() > 0 ? getTimeout() * 1000 : 0;
final int port = uri.getPort() > 0 ? uri.getPort() : GIT_PORT;
@SuppressWarnings("resource") // Closed by the caller
final Socket s = new Socket();
try {
final InetAddress host = InetAddress.getByName(uri.getHost());
s.connect(new InetSocketAddress(host, port), tms);
} catch (IOException c) {
try {
s.close();
} catch (IOException closeErr) {
// ignore a failure during close, we're already failing
}
if (c instanceof UnknownHostException)
throw new TransportException(uri, JGitText.get().unknownHost);
if (c instanceof ConnectException)
throw new TransportException(uri, c.getMessage());
throw new TransportException(uri, c.getMessage(), c);
}
return s;
}
void service(String name, PacketLineOut pckOut,
TransferConfig.ProtocolVersion gitProtocol)
throws IOException {
final StringBuilder cmd = new StringBuilder();
cmd.append(name);
cmd.append(' ');
cmd.append(uri.getPath());
cmd.append('\0');
cmd.append("host="); //$NON-NLS-1$
cmd.append(uri.getHost());
if (uri.getPort() > 0 && uri.getPort() != GIT_PORT) {
cmd.append(":"); //$NON-NLS-1$
cmd.append(uri.getPort());
}
cmd.append('\0');
if (TransferConfig.ProtocolVersion.V2.equals(gitProtocol)) {
cmd.append('\0');
cmd.append(GitProtocolConstants.VERSION_2_REQUEST);
cmd.append('\0');
}
pckOut.writeString(cmd.toString());
pckOut.flush();
}
class TcpFetchConnection extends BasePackFetchConnection {
private Socket sock;
TcpFetchConnection() throws TransportException {
this(Collections.emptyList());
}
TcpFetchConnection(Collection refSpecs,
String... additionalPatterns) throws TransportException {
super(TransportGitAnon.this);
sock = openConnection();
try {
InputStream sIn = sock.getInputStream();
OutputStream sOut = sock.getOutputStream();
sIn = new BufferedInputStream(sIn);
sOut = new BufferedOutputStream(sOut);
init(sIn, sOut);
TransferConfig.ProtocolVersion gitProtocol = protocol;
if (gitProtocol == null) {
gitProtocol = TransferConfig.ProtocolVersion.V2;
}
service("git-upload-pack", pckOut, gitProtocol); //$NON-NLS-1$
} catch (IOException err) {
close();
throw new TransportException(uri,
JGitText.get().remoteHungUpUnexpectedly, err);
}
if (!readAdvertisedRefs()) {
lsRefs(refSpecs, additionalPatterns);
}
}
@Override
public void close() {
super.close();
if (sock != null) {
try {
sock.close();
} catch (IOException err) {
// Ignore errors during close.
} finally {
sock = null;
}
}
}
}
class TcpPushConnection extends BasePackPushConnection {
private Socket sock;
TcpPushConnection() throws TransportException {
super(TransportGitAnon.this);
sock = openConnection();
try {
InputStream sIn = sock.getInputStream();
OutputStream sOut = sock.getOutputStream();
sIn = new BufferedInputStream(sIn);
sOut = new BufferedOutputStream(sOut);
init(sIn, sOut);
service("git-receive-pack", pckOut, null); //$NON-NLS-1$
} catch (IOException err) {
close();
throw new TransportException(uri,
JGitText.get().remoteHungUpUnexpectedly, err);
}
readAdvertisedRefs();
}
@Override
public void close() {
super.close();
if (sock != null) {
try {
sock.close();
} catch (IOException err) {
// Ignore errors during close.
} finally {
sock = null;
}
}
}
}
}