/*
* Copyright (C) 2008-2010, Google Inc.
* and other copyright owners as documented in the project's IP log.
*
* This program and the accompanying materials are made available
* under the terms of the Eclipse Distribution License v1.0 which
* accompanies this distribution, is reproduced below, and is
* available at http://www.eclipse.org/org/documents/edl-v10.php
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - 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.
*
* - Neither the name of the Eclipse Foundation, Inc. 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 COPYRIGHT OWNER 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.
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package org.eclipse.jgit.transport;
import static org.eclipse.jgit.transport.GitProtocolConstants.CAPABILITY_ATOMIC;
import static org.eclipse.jgit.transport.GitProtocolConstants.CAPABILITY_DELETE_REFS;
import static org.eclipse.jgit.transport.GitProtocolConstants.CAPABILITY_OFS_DELTA;
import static org.eclipse.jgit.transport.GitProtocolConstants.CAPABILITY_QUIET;
import static org.eclipse.jgit.transport.GitProtocolConstants.CAPABILITY_REPORT_STATUS;
import static org.eclipse.jgit.transport.GitProtocolConstants.CAPABILITY_SIDE_BAND_64K;
import static org.eclipse.jgit.transport.GitProtocolConstants.OPTION_AGENT;
import static org.eclipse.jgit.transport.SideBandOutputStream.CH_DATA;
import static org.eclipse.jgit.transport.SideBandOutputStream.CH_PROGRESS;
import static org.eclipse.jgit.transport.SideBandOutputStream.MAX_BUF;
import java.io.EOFException;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.text.MessageFormat;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.TimeUnit;
import org.eclipse.jgit.errors.MissingObjectException;
import org.eclipse.jgit.errors.PackProtocolException;
import org.eclipse.jgit.errors.TooLargePackException;
import org.eclipse.jgit.internal.JGitText;
import org.eclipse.jgit.internal.storage.file.PackLock;
import org.eclipse.jgit.lib.BatchRefUpdate;
import org.eclipse.jgit.lib.Config;
import org.eclipse.jgit.lib.Config.SectionParser;
import org.eclipse.jgit.lib.Constants;
import org.eclipse.jgit.lib.NullProgressMonitor;
import org.eclipse.jgit.lib.ObjectChecker;
import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.lib.ObjectIdSubclassMap;
import org.eclipse.jgit.lib.ObjectInserter;
import org.eclipse.jgit.lib.PersonIdent;
import org.eclipse.jgit.lib.ProgressMonitor;
import org.eclipse.jgit.lib.Ref;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.revwalk.ObjectWalk;
import org.eclipse.jgit.revwalk.RevBlob;
import org.eclipse.jgit.revwalk.RevCommit;
import org.eclipse.jgit.revwalk.RevFlag;
import org.eclipse.jgit.revwalk.RevObject;
import org.eclipse.jgit.revwalk.RevSort;
import org.eclipse.jgit.revwalk.RevTree;
import org.eclipse.jgit.revwalk.RevWalk;
import org.eclipse.jgit.transport.ReceiveCommand.Result;
import org.eclipse.jgit.util.io.InterruptTimer;
import org.eclipse.jgit.util.io.LimitedInputStream;
import org.eclipse.jgit.util.io.TimeoutInputStream;
import org.eclipse.jgit.util.io.TimeoutOutputStream;
/**
* Base implementation of the side of a push connection that receives objects.
* <p>
* Contains high-level operations for initializing and closing streams,
* advertising refs, reading commands, and receiving and applying a pack.
* Subclasses compose these operations into full service implementations.
*/
public abstract class BaseReceivePack {
/** Data in the first line of a request, the line itself plus capabilities. */
public static class FirstLine {
private final String line;
private final Set<String> capabilities;
/**
* Parse the first line of a receive-pack request.
*
* @param line
* line from the client.
*/
public FirstLine(String line) {
final HashSet<String> caps = new HashSet<String>();
final int nul = line.indexOf('\0');
if (nul >= 0) {
for (String c : line.substring(nul + 1).split(" ")) //$NON-NLS-1$
caps.add(c);
this.line = line.substring(0, nul);
} else
this.line = line;
this.capabilities = Collections.unmodifiableSet(caps);
}
/** @return non-capabilities part of the line. */
public String getLine() {
return line;
}
/** @return capabilities parsed from the line. */
public Set<String> getCapabilities() {
return capabilities;
}
}
/** Database we write the stored objects into. */
private final Repository db;
/** Revision traversal support over {@link #db}. */
private final RevWalk walk;
/**
* Is the client connection a bi-directional socket or pipe?
* <p>
* If true, this class assumes it can perform multiple read and write cycles
* with the client over the input and output streams. This matches the
* functionality available with a standard TCP/IP connection, or a local
* operating system or in-memory pipe.
* <p>
* If false, this class runs in a read everything then output results mode,
* making it suitable for single round-trip systems RPCs such as HTTP.
*/
private boolean biDirectionalPipe = true;
/** Expecting data after the pack footer */
private boolean expectDataAfterPackFooter;
/** Should an incoming transfer validate objects? */
private ObjectChecker objectChecker;
/** Should an incoming transfer permit create requests? */
private boolean allowCreates;
/** Should an incoming transfer permit delete requests? */
private boolean allowAnyDeletes;
private boolean allowBranchDeletes;
/** Should an incoming transfer permit non-fast-forward requests? */
private boolean allowNonFastForwards;
private boolean allowOfsDelta;
private boolean allowQuiet = true;
/** Identity to record action as within the reflog. */
private PersonIdent refLogIdent;
/** Hook used while advertising the refs to the client. */
private AdvertiseRefsHook advertiseRefsHook;
/** Filter used while advertising the refs to the client. */
private RefFilter refFilter;
/** Timeout in seconds to wait for client interaction. */
private int timeout;
/** Timer to manage {@link #timeout}. */
private InterruptTimer timer;
private TimeoutInputStream timeoutIn;
// Original stream passed to init(), since rawOut may be wrapped in a
// sideband.
private OutputStream origOut;
/** Raw input stream. */
protected InputStream rawIn;
/** Raw output stream. */
protected OutputStream rawOut;
/** Optional message output stream. */
protected OutputStream msgOut;
/** Packet line input stream around {@link #rawIn}. */
protected PacketLineIn pckIn;
/** Packet line output stream around {@link #rawOut}. */
protected PacketLineOut pckOut;
private final MessageOutputWrapper msgOutWrapper = new MessageOutputWrapper();
private PackParser parser;
/** The refs we advertised as existing at the start of the connection. */
private Map<String, Ref> refs;
/** All SHA-1s shown to the client, which can be possible edges. */
private Set<ObjectId> advertisedHaves;
/** Capabilities requested by the client. */
private Set<String> enabledCapabilities;
String userAgent;
private Set<ObjectId> clientShallowCommits;
private List<ReceiveCommand> commands;
private StringBuilder advertiseError;
/** If {@link BasePackPushConnection#CAPABILITY_SIDE_BAND_64K} is enabled. */
private boolean sideBand;
private boolean quiet;
/** Lock around the received pack file, while updating refs. */
private PackLock packLock;
private boolean checkReferencedIsReachable;
/** Git object size limit */
private long maxObjectSizeLimit;
/** Total pack size limit */
private long maxPackSizeLimit = -1;
/** The size of the received pack, including index size */
private Long packSize;
private PushCertificateParser pushCertificateParser;
private SignedPushConfig signedPushConfig;
private PushCertificate pushCert;
/**
* Get the push certificate used to verify the pusher's identity.
* <p>
* Only valid after commands are read from the wire.
*
* @return the parsed certificate, or null if push certificates are disabled
* or no cert was presented by the client.
* @since 4.1
*/
public PushCertificate getPushCertificate() {
return pushCert;
}
/**
* Set the push certificate used to verify the pusher's identity.
* <p>
* Should only be called if reconstructing an instance without going through
* the normal {@link #recvCommands()} flow.
*
* @param cert
* the push certificate to set.
* @since 4.1
*/
public void setPushCertificate(PushCertificate cert) {
pushCert = cert;
}
/**
* Create a new pack receive for an open repository.
*
* @param into
* the destination repository.
*/
protected BaseReceivePack(final Repository into) {
db = into;
walk = new RevWalk(db);
final ReceiveConfig cfg = db.getConfig().get(ReceiveConfig.KEY);
objectChecker = cfg.newObjectChecker();
allowCreates = cfg.allowCreates;
allowAnyDeletes = true;
allowBranchDeletes = cfg.allowDeletes;
allowNonFastForwards = cfg.allowNonFastForwards;
allowOfsDelta = cfg.allowOfsDelta;
advertiseRefsHook = AdvertiseRefsHook.DEFAULT;
refFilter = RefFilter.DEFAULT;
advertisedHaves = new HashSet<ObjectId>();
clientShallowCommits = new HashSet<ObjectId>();
signedPushConfig = cfg.signedPush;
}
/** Configuration for receive operations. */
protected static class ReceiveConfig {
static final SectionParser<ReceiveConfig> KEY = new SectionParser<ReceiveConfig>() {
public ReceiveConfig parse(final Config cfg) {
return new ReceiveConfig(cfg);
}
};
final boolean checkReceivedObjects;
final boolean allowLeadingZeroFileMode;
final boolean allowInvalidPersonIdent;
final boolean safeForWindows;
final boolean safeForMacOS;
final boolean allowCreates;
final boolean allowDeletes;
final boolean allowNonFastForwards;
final boolean allowOfsDelta;
final SignedPushConfig signedPush;
ReceiveConfig(final Config config) {
checkReceivedObjects = config.getBoolean(
"receive", "fsckobjects", //$NON-NLS-1$ //$NON-NLS-2$
config.getBoolean("transfer", "fsckobjects", false)); //$NON-NLS-1$ //$NON-NLS-2$
allowLeadingZeroFileMode = checkReceivedObjects
&& config.getBoolean("fsck", "allowLeadingZeroFileMode", false); //$NON-NLS-1$ //$NON-NLS-2$
allowInvalidPersonIdent = checkReceivedObjects
&& config.getBoolean("fsck", "allowInvalidPersonIdent", false); //$NON-NLS-1$ //$NON-NLS-2$
safeForWindows = checkReceivedObjects
&& config.getBoolean("fsck", "safeForWindows", false); //$NON-NLS-1$ //$NON-NLS-2$
safeForMacOS = checkReceivedObjects
&& config.getBoolean("fsck", "safeForMacOS", false); //$NON-NLS-1$ //$NON-NLS-2$
allowCreates = true;
allowDeletes = !config.getBoolean("receive", "denydeletes", false); //$NON-NLS-1$ //$NON-NLS-2$
allowNonFastForwards = !config.getBoolean("receive", //$NON-NLS-1$
"denynonfastforwards", false); //$NON-NLS-1$
allowOfsDelta = config.getBoolean("repack", "usedeltabaseoffset", //$NON-NLS-1$ //$NON-NLS-2$
true);
signedPush = SignedPushConfig.KEY.parse(config);
}
ObjectChecker newObjectChecker() {
if (!checkReceivedObjects)
return null;
return new ObjectChecker()
.setAllowLeadingZeroFileMode(allowLeadingZeroFileMode)
.setAllowInvalidPersonIdent(allowInvalidPersonIdent)
.setSafeForWindows(safeForWindows)
.setSafeForMacOS(safeForMacOS);
}
}
/**
* Output stream that wraps the current {@link #msgOut}.
* <p>
* We don't want to expose {@link #msgOut} directly because it can change
* several times over the course of a session.
*/
class MessageOutputWrapper extends OutputStream {
@Override
public void write(int ch) {
if (msgOut != null) {
try {
msgOut.write(ch);
} catch (IOException e) {
// Ignore write failures.
}
}
}
@Override
public void write(byte[] b, int off, int len) {
if (msgOut != null) {
try {
msgOut.write(b, off, len);
} catch (IOException e) {
// Ignore write failures.
}
}
}
@Override
public void write(byte[] b) {
write(b, 0, b.length);
}
@Override
public void flush() {
if (msgOut != null) {
try {
msgOut.flush();
} catch (IOException e) {
// Ignore write failures.
}
}
}
}
/** @return the process name used for pack lock messages. */
protected abstract String getLockMessageProcessName();
/** @return the repository this receive completes into. */
public final Repository getRepository() {
return db;
}
/** @return the RevWalk instance used by this connection. */
public final RevWalk getRevWalk() {
return walk;
}
/**
* Get refs which were advertised to the client.
*
* @return all refs which were advertised to the client, or null if
* {@link #setAdvertisedRefs(Map, Set)} has not been called yet.
*/
public final Map<String, Ref> getAdvertisedRefs() {
return refs;
}
/**
* Set the refs advertised by this ReceivePack.
* <p>
* Intended to be called from a {@link PreReceiveHook}.
*
* @param allRefs
* explicit set of references to claim as advertised by this
* ReceivePack instance. This overrides any references that
* may exist in the source repository. The map is passed
* to the configured {@link #getRefFilter()}. If null, assumes
* all refs were advertised.
* @param additionalHaves
* explicit set of additional haves to claim as advertised. If
* null, assumes the default set of additional haves from the
* repository.
*/
public void setAdvertisedRefs(Map<String, Ref> allRefs, Set<ObjectId> additionalHaves) {
refs = allRefs != null ? allRefs : db.getAllRefs();
refs = refFilter.filter(refs);
Ref head = refs.get(Constants.HEAD);
if (head != null && head.isSymbolic())
refs.remove(Constants.HEAD);
for (Ref ref : refs.values()) {
if (ref.getObjectId() != null)
advertisedHaves.add(ref.getObjectId());
}
if (additionalHaves != null)
advertisedHaves.addAll(additionalHaves);
else
advertisedHaves.addAll(db.getAdditionalHaves());
}
/**
* Get objects advertised to the client.
*
* @return the set of objects advertised to the as present in this repository,
* or null if {@link #setAdvertisedRefs(Map, Set)} has not been called
* yet.
*/
public final Set<ObjectId> getAdvertisedObjects() {
return advertisedHaves;
}
/**
* @return true if this instance will validate all referenced, but not
* supplied by the client, objects are reachable from another
* reference.
*/
public boolean isCheckReferencedObjectsAreReachable() {
return checkReferencedIsReachable;
}
/**
* Validate all referenced but not supplied objects are reachable.
* <p>
* If enabled, this instance will verify that references to objects not
* contained within the received pack are already reachable through at least
* one other reference displayed as part of {@link #getAdvertisedRefs()}.
* <p>
* This feature is useful when the application doesn't trust the client to
* not provide a forged SHA-1 reference to an object, in an attempt to
* access parts of the DAG that they aren't allowed to see and which have
* been hidden from them via the configured {@link AdvertiseRefsHook} or
* {@link RefFilter}.
* <p>
* Enabling this feature may imply at least some, if not all, of the same
* functionality performed by {@link #setCheckReceivedObjects(boolean)}.
* Applications are encouraged to enable both features, if desired.
*
* @param b
* {@code true} to enable the additional check.
*/
public void setCheckReferencedObjectsAreReachable(boolean b) {
this.checkReferencedIsReachable = b;
}
/**
* @return true if this class expects a bi-directional pipe opened between
* the client and itself. The default is true.
*/
public boolean isBiDirectionalPipe() {
return biDirectionalPipe;
}
/**
* @param twoWay
* if true, this class will assume the socket is a fully
* bidirectional pipe between the two peers and takes advantage
* of that by first transmitting the known refs, then waiting to
* read commands. If false, this class assumes it must read the
* commands before writing output and does not perform the
* initial advertising.
*/
public void setBiDirectionalPipe(final boolean twoWay) {
biDirectionalPipe = twoWay;
}
/** @return true if there is data expected after the pack footer. */
public boolean isExpectDataAfterPackFooter() {
return expectDataAfterPackFooter;
}
/**
* @param e
* true if there is additional data in InputStream after pack.
*/
public void setExpectDataAfterPackFooter(boolean e) {
expectDataAfterPackFooter = e;
}
/**
* @return true if this instance will verify received objects are formatted
* correctly. Validating objects requires more CPU time on this side
* of the connection.
*/
public boolean isCheckReceivedObjects() {
return objectChecker != null;
}
/**
* @param check
* true to enable checking received objects; false to assume all
* received objects are valid.
* @see #setObjectChecker(ObjectChecker)
*/
public void setCheckReceivedObjects(final boolean check) {
if (check && objectChecker == null)
setObjectChecker(new ObjectChecker());
else if (!check && objectChecker != null)
setObjectChecker(null);
}
/**
* @param impl if non-null the object checking instance to verify each
* received object with; null to disable object checking.
* @since 3.4
*/
public void setObjectChecker(ObjectChecker impl) {
objectChecker = impl;
}
/** @return true if the client can request refs to be created. */
public boolean isAllowCreates() {
return allowCreates;
}
/**
* @param canCreate
* true to permit create ref commands to be processed.
*/
public void setAllowCreates(final boolean canCreate) {
allowCreates = canCreate;
}
/** @return true if the client can request refs to be deleted. */
public boolean isAllowDeletes() {
return allowAnyDeletes;
}
/**
* @param canDelete
* true to permit delete ref commands to be processed.
*/
public void setAllowDeletes(final boolean canDelete) {
allowAnyDeletes = canDelete;
}
/**
* @return true if the client can delete from {@code refs/heads/}.
* @since 3.6
*/
public boolean isAllowBranchDeletes() {
return allowBranchDeletes;
}
/**
* @param canDelete
* true to permit deletion of branches from the
* {@code refs/heads/} namespace.
* @since 3.6
*/
public void setAllowBranchDeletes(boolean canDelete) {
allowBranchDeletes = canDelete;
}
/**
* @return true if the client can request non-fast-forward updates of a ref,
* possibly making objects unreachable.
*/
public boolean isAllowNonFastForwards() {
return allowNonFastForwards;
}
/**
* @param canRewind
* true to permit the client to ask for non-fast-forward updates
* of an existing ref.
*/
public void setAllowNonFastForwards(final boolean canRewind) {
allowNonFastForwards = canRewind;
}
/** @return identity of the user making the changes in the reflog. */
public PersonIdent getRefLogIdent() {
return refLogIdent;
}
/**
* Set the identity of the user appearing in the affected reflogs.
* <p>
* The timestamp portion of the identity is ignored. A new identity with the
* current timestamp will be created automatically when the updates occur
* and the log records are written.
*
* @param pi
* identity of the user. If null the identity will be
* automatically determined based on the repository
* configuration.
*/
public void setRefLogIdent(final PersonIdent pi) {
refLogIdent = pi;
}
/** @return the hook used while advertising the refs to the client */
public AdvertiseRefsHook getAdvertiseRefsHook() {
return advertiseRefsHook;
}
/** @return the filter used while advertising the refs to the client */
public RefFilter getRefFilter() {
return refFilter;
}
/**
* Set the hook used while advertising the refs to the client.
* <p>
* If the {@link AdvertiseRefsHook} chooses to call
* {@link #setAdvertisedRefs(Map,Set)}, only refs set by this hook
* <em>and</em> selected by the {@link RefFilter} will be shown to the client.
* Clients may still attempt to create or update a reference not advertised by
* the configured {@link AdvertiseRefsHook}. These attempts should be rejected
* by a matching {@link PreReceiveHook}.
*
* @param advertiseRefsHook
* the hook; may be null to show all refs.
*/
public void setAdvertiseRefsHook(final AdvertiseRefsHook advertiseRefsHook) {
if (advertiseRefsHook != null)
this.advertiseRefsHook = advertiseRefsHook;
else
this.advertiseRefsHook = AdvertiseRefsHook.DEFAULT;
}
/**
* Set the filter used while advertising the refs to the client.
* <p>
* Only refs allowed by this filter will be shown to the client.
* The filter is run against the refs specified by the
* {@link AdvertiseRefsHook} (if applicable).
*
* @param refFilter
* the filter; may be null to show all refs.
*/
public void setRefFilter(final RefFilter refFilter) {
this.refFilter = refFilter != null ? refFilter : RefFilter.DEFAULT;
}
/** @return timeout (in seconds) before aborting an IO operation. */
public int getTimeout() {
return timeout;
}
/**
* Set the timeout before willing to abort an IO call.
*
* @param seconds
* number of seconds to wait (with no data transfer occurring)
* before aborting an IO read or write operation with the
* connected client.
*/
public void setTimeout(final int seconds) {
timeout = seconds;
}
/**
* Set the maximum allowed Git object size.
* <p>
* If an object is larger than the given size the pack-parsing will throw an
* exception aborting the receive-pack operation.
*
* @param limit
* the Git object size limit. If zero then there is not limit.
*/
public void setMaxObjectSizeLimit(final long limit) {
maxObjectSizeLimit = limit;
}
/**
* Set the maximum allowed pack size.
* <p>
* A pack exceeding this size will be rejected.
*
* @param limit
* the pack size limit, in bytes
*
* @since 3.3
*/
public void setMaxPackSizeLimit(final long limit) {
if (limit < 0)
throw new IllegalArgumentException(MessageFormat.format(
JGitText.get().receivePackInvalidLimit, Long.valueOf(limit)));
maxPackSizeLimit = limit;
}
/**
* Check whether the client expects a side-band stream.
*
* @return true if the client has advertised a side-band capability, false
* otherwise.
* @throws RequestNotYetReadException
* if the client's request has not yet been read from the wire, so
* we do not know if they expect side-band. Note that the client
* may have already written the request, it just has not been
* read.
*/
public boolean isSideBand() throws RequestNotYetReadException {
if (enabledCapabilities == null)
throw new RequestNotYetReadException();
return enabledCapabilities.contains(CAPABILITY_SIDE_BAND_64K);
}
/**
* @return true if clients may request avoiding noisy progress messages.
* @since 4.0
*/
public boolean isAllowQuiet() {
return allowQuiet;
}
/**
* Configure if clients may request the server skip noisy messages.
*
* @param allow
* true to allow clients to request quiet behavior; false to
* refuse quiet behavior and send messages anyway. This may be
* necessary if processing is slow and the client-server network
* connection can timeout.
* @since 4.0
*/
public void setAllowQuiet(boolean allow) {
allowQuiet = allow;
}
/**
* True if the client wants less verbose output.
*
* @return true if the client has requested the server to be less verbose.
* @throws RequestNotYetReadException
* if the client's request has not yet been read from the wire,
* so we do not know if they expect side-band. Note that the
* client may have already written the request, it just has not
* been read.
* @since 4.0
*/
public boolean isQuiet() throws RequestNotYetReadException {
if (enabledCapabilities == null)
throw new RequestNotYetReadException();
return quiet;
}
/**
* Set the configuration for push certificate verification.
*
* @param cfg
* new configuration; if this object is null or its {@link
* SignedPushConfig#getCertNonceSeed()} is null, push certificate
* verification will be disabled.
* @since 4.1
*/
public void setSignedPushConfig(SignedPushConfig cfg) {
signedPushConfig = cfg;
}
private PushCertificateParser getPushCertificateParser() {
if (pushCertificateParser == null) {
pushCertificateParser = new PushCertificateParser(db, signedPushConfig);
}
return pushCertificateParser;
}
/**
* Get the user agent of the client.
* <p>
* If the client is new enough to use {@code agent=} capability that value
* will be returned. Older HTTP clients may also supply their version using
* the HTTP {@code User-Agent} header. The capability overrides the HTTP
* header if both are available.
* <p>
* When an HTTP request has been received this method returns the HTTP
* {@code User-Agent} header value until capabilities have been parsed.
*
* @return user agent supplied by the client. Available only if the client
* is new enough to advertise its user agent.
* @since 4.0
*/
public String getPeerUserAgent() {
return UserAgent.getAgent(enabledCapabilities, userAgent);
}
/** @return all of the command received by the current request. */
public List<ReceiveCommand> getAllCommands() {
return Collections.unmodifiableList(commands);
}
/**
* Send an error message to the client.
* <p>
* If any error messages are sent before the references are advertised to
* the client, the errors will be sent instead of the advertisement and the
* receive operation will be aborted. All clients should receive and display
* such early stage errors.
* <p>
* If the reference advertisements have already been sent, messages are sent
* in a side channel. If the client doesn't support receiving messages, the
* message will be discarded, with no other indication to the caller or to
* the client.
* <p>
* {@link PreReceiveHook}s should always try to use
* {@link ReceiveCommand#setResult(Result, String)} with a result status of
* {@link Result#REJECTED_OTHER_REASON} to indicate any reasons for
* rejecting an update. Messages attached to a command are much more likely
* to be returned to the client.
*
* @param what
* string describing the problem identified by the hook. The
* string must not end with an LF, and must not contain an LF.
*/
public void sendError(final String what) {
if (refs == null) {
if (advertiseError == null)
advertiseError = new StringBuilder();
advertiseError.append(what).append('\n');
} else {
msgOutWrapper.write(Constants.encode("error: " + what + "\n")); //$NON-NLS-1$ //$NON-NLS-2$
}
}
/**
* Send a message to the client, if it supports receiving them.
* <p>
* If the client doesn't support receiving messages, the message will be
* discarded, with no other indication to the caller or to the client.
*
* @param what
* string describing the problem identified by the hook. The
* string must not end with an LF, and must not contain an LF.
*/
public void sendMessage(final String what) {
msgOutWrapper.write(Constants.encode(what + "\n")); //$NON-NLS-1$
}
/** @return an underlying stream for sending messages to the client. */
public OutputStream getMessageOutputStream() {
return msgOutWrapper;
}
/**
* Get the size of the received pack file including the index size.
*
* This can only be called if the pack is already received.
*
* @return the size of the received pack including index size
* @throws IllegalStateException
* if called before the pack has been received
* @since 3.3
*/
public long getPackSize() {
if (packSize != null)
return packSize.longValue();
throw new IllegalStateException(JGitText.get().packSizeNotSetYet);
}
/**
* Get the commits from the client's shallow file.
*
* @return if the client is a shallow repository, the list of edge commits
* that define the client's shallow boundary. Empty set if the client
* is earlier than Git 1.9, or is a full clone.
* @since 3.5
*/
protected Set<ObjectId> getClientShallowCommits() {
return clientShallowCommits;
}
/** @return true if any commands to be executed have been read. */
protected boolean hasCommands() {
return !commands.isEmpty();
}
/** @return true if an error occurred that should be advertised. */
protected boolean hasError() {
return advertiseError != null;
}
/**
* Initialize the instance with the given streams.
*
* @param input
* raw input to read client commands and pack data from. Caller
* must ensure the input is buffered, otherwise read performance
* may suffer.
* @param output
* response back to the Git network client. Caller must ensure
* the output is buffered, otherwise write performance may
* suffer.
* @param messages
* secondary "notice" channel to send additional messages out
* through. When run over SSH this should be tied back to the
* standard error channel of the command execution. For most
* other network connections this should be null.
*/
protected void init(final InputStream input, final OutputStream output,
final OutputStream messages) {
origOut = output;
rawIn = input;
rawOut = output;
msgOut = messages;
if (timeout > 0) {
final Thread caller = Thread.currentThread();
timer = new InterruptTimer(caller.getName() + "-Timer"); //$NON-NLS-1$
timeoutIn = new TimeoutInputStream(rawIn, timer);
TimeoutOutputStream o = new TimeoutOutputStream(rawOut, timer);
timeoutIn.setTimeout(timeout * 1000);
o.setTimeout(timeout * 1000);
rawIn = timeoutIn;
rawOut = o;
}
if (maxPackSizeLimit >= 0)
rawIn = new LimitedInputStream(rawIn, maxPackSizeLimit) {
@Override
protected void limitExceeded() throws TooLargePackException {
throw new TooLargePackException(limit);
}
};
pckIn = new PacketLineIn(rawIn);
pckOut = new PacketLineOut(rawOut);
pckOut.setFlushOnEnd(false);
enabledCapabilities = new HashSet<String>();
commands = new ArrayList<ReceiveCommand>();
}
/** @return advertised refs, or the default if not explicitly advertised. */
protected Map<String, Ref> getAdvertisedOrDefaultRefs() {
if (refs == null)
setAdvertisedRefs(null, null);
return refs;
}
/**
* Receive a pack from the stream and check connectivity if necessary.
*
* @throws IOException
* an error occurred during unpacking or connectivity checking.
*/
protected void receivePackAndCheckConnectivity() throws IOException {
receivePack();
if (needCheckConnectivity())
checkConnectivity();
parser = null;
}
/**
* Unlock the pack written by this object.
*
* @throws IOException
* the pack could not be unlocked.
*/
protected void unlockPack() throws IOException {
if (packLock != null) {
packLock.unlock();
packLock = null;
}
}
/**
* Generate an advertisement of available refs and capabilities.
*
* @param adv
* the advertisement formatter.
* @throws IOException
* the formatter failed to write an advertisement.
* @throws ServiceMayNotContinueException
* the hook denied advertisement.
*/
public void sendAdvertisedRefs(final RefAdvertiser adv)
throws IOException, ServiceMayNotContinueException {
if (advertiseError != null) {
adv.writeOne("ERR " + advertiseError); //$NON-NLS-1$
return;
}
try {
advertiseRefsHook.advertiseRefs(this);
} catch (ServiceMayNotContinueException fail) {
if (fail.getMessage() != null) {
adv.writeOne("ERR " + fail.getMessage()); //$NON-NLS-1$
fail.setOutput();
}
throw fail;
}
adv.init(db);
adv.advertiseCapability(CAPABILITY_SIDE_BAND_64K);
adv.advertiseCapability(CAPABILITY_DELETE_REFS);
adv.advertiseCapability(CAPABILITY_REPORT_STATUS);
if (allowQuiet)
adv.advertiseCapability(CAPABILITY_QUIET);
String nonce = getPushCertificateParser().getAdvertiseNonce();
if (nonce != null) {
adv.advertiseCapability(nonce);
}
if (db.getRefDatabase().performsAtomicTransactions())
adv.advertiseCapability(CAPABILITY_ATOMIC);
if (allowOfsDelta)
adv.advertiseCapability(CAPABILITY_OFS_DELTA);
adv.advertiseCapability(OPTION_AGENT, UserAgent.get());
adv.send(getAdvertisedOrDefaultRefs());
for (ObjectId obj : advertisedHaves)
adv.advertiseHave(obj);
if (adv.isEmpty())
adv.advertiseId(ObjectId.zeroId(), "capabilities^{}"); //$NON-NLS-1$
adv.end();
}
/**
* Receive a list of commands from the input.
*
* @throws IOException
*/
protected void recvCommands() throws IOException {
PushCertificateParser certParser = getPushCertificateParser();
FirstLine firstLine = null;
try {
for (;;) {
String line;
try {
line = pckIn.readString();
} catch (EOFException eof) {
if (commands.isEmpty())
return;
throw eof;
}
if (line == PacketLineIn.END) {
break;
}
if (line.length() >= 48 && line.startsWith("shallow ")) { //$NON-NLS-1$
clientShallowCommits.add(ObjectId.fromString(line.substring(8, 48)));
continue;
}
if (firstLine == null) {
firstLine = new FirstLine(line);
enabledCapabilities = firstLine.getCapabilities();
line = firstLine.getLine();
if (line.equals(GitProtocolConstants.OPTION_PUSH_CERT)) {
certParser.receiveHeader(pckIn, !isBiDirectionalPipe());
continue;
}
}
if (line.equals(PushCertificateParser.BEGIN_SIGNATURE)) {
certParser.receiveSignature(pckIn);
continue;
}
ReceiveCommand cmd;
try {
cmd = parseCommand(line);
} catch (PackProtocolException e) {
sendError(e.getMessage());
throw e;
}
if (cmd.getRefName().equals(Constants.HEAD)) {
cmd.setResult(Result.REJECTED_CURRENT_BRANCH);
} else {
cmd.setRef(refs.get(cmd.getRefName()));
}
commands.add(cmd);
if (certParser.enabled()) {
certParser.addCommand(cmd);
}
}
pushCert = certParser.build();
} catch (PackProtocolException e) {
sendError(e.getMessage());
throw e;
}
}
static ReceiveCommand parseCommand(String line) throws PackProtocolException {
if (line == null || line.length() < 83) {
throw new PackProtocolException(
JGitText.get().errorInvalidProtocolWantedOldNewRef);
}
String oldStr = line.substring(0, 40);
String newStr = line.substring(41, 81);
ObjectId oldId, newId;
try {
oldId = ObjectId.fromString(oldStr);
newId = ObjectId.fromString(newStr);
} catch (IllegalArgumentException e) {
throw new PackProtocolException(
JGitText.get().errorInvalidProtocolWantedOldNewRef, e);
}
String name = line.substring(82);
if (!Repository.isValidRefName(name)) {
throw new PackProtocolException(
JGitText.get().errorInvalidProtocolWantedOldNewRef);
}
return new ReceiveCommand(oldId, newId, name);
}
/** Enable capabilities based on a previously read capabilities line. */
protected void enableCapabilities() {
sideBand = isCapabilityEnabled(CAPABILITY_SIDE_BAND_64K);
quiet = allowQuiet && isCapabilityEnabled(CAPABILITY_QUIET);
if (sideBand) {
OutputStream out = rawOut;
rawOut = new SideBandOutputStream(CH_DATA, MAX_BUF, out);
msgOut = new SideBandOutputStream(CH_PROGRESS, MAX_BUF, out);
pckOut = new PacketLineOut(rawOut);
pckOut.setFlushOnEnd(false);
}
}
/**
* Check if the peer requested a capability.
*
* @param name
* protocol name identifying the capability.
* @return true if the peer requested the capability to be enabled.
*/
protected boolean isCapabilityEnabled(String name) {
return enabledCapabilities.contains(name);
}
/** @return true if a pack is expected based on the list of commands. */
protected boolean needPack() {
for (final ReceiveCommand cmd : commands) {
if (cmd.getType() != ReceiveCommand.Type.DELETE)
return true;
}
return false;
}
/**
* Receive a pack from the input and store it in the repository.
*
* @throws IOException
* an error occurred reading or indexing the pack.
*/
private void receivePack() throws IOException {
// It might take the client a while to pack the objects it needs
// to send to us. We should increase our timeout so we don't
// abort while the client is computing.
//
if (timeoutIn != null)
timeoutIn.setTimeout(10 * timeout * 1000);
ProgressMonitor receiving = NullProgressMonitor.INSTANCE;
ProgressMonitor resolving = NullProgressMonitor.INSTANCE;
if (sideBand && !quiet)
resolving = new SideBandProgressMonitor(msgOut);
try (ObjectInserter ins = db.newObjectInserter()) {
String lockMsg = "jgit receive-pack"; //$NON-NLS-1$
if (getRefLogIdent() != null)
lockMsg += " from " + getRefLogIdent().toExternalString(); //$NON-NLS-1$
parser = ins.newPackParser(rawIn);
parser.setAllowThin(true);
parser.setNeedNewObjectIds(checkReferencedIsReachable);
parser.setNeedBaseObjectIds(checkReferencedIsReachable);
parser.setCheckEofAfterPackFooter(!biDirectionalPipe
&& !isExpectDataAfterPackFooter());
parser.setExpectDataAfterPackFooter(isExpectDataAfterPackFooter());
parser.setObjectChecker(objectChecker);
parser.setLockMessage(lockMsg);
parser.setMaxObjectSizeLimit(maxObjectSizeLimit);
packLock = parser.parse(receiving, resolving);
packSize = Long.valueOf(parser.getPackSize());
ins.flush();
}
if (timeoutIn != null)
timeoutIn.setTimeout(timeout * 1000);
}
private boolean needCheckConnectivity() {
return isCheckReceivedObjects()
|| isCheckReferencedObjectsAreReachable()
|| !getClientShallowCommits().isEmpty();
}
private void checkConnectivity() throws IOException {
ObjectIdSubclassMap<ObjectId> baseObjects = null;
ObjectIdSubclassMap<ObjectId> providedObjects = null;
ProgressMonitor checking = NullProgressMonitor.INSTANCE;
if (sideBand && !quiet) {
SideBandProgressMonitor m = new SideBandProgressMonitor(msgOut);
m.setDelayStart(750, TimeUnit.MILLISECONDS);
checking = m;
}
if (checkReferencedIsReachable) {
baseObjects = parser.getBaseObjectIds();
providedObjects = parser.getNewObjectIds();
}
parser = null;
try (final ObjectWalk ow = new ObjectWalk(db)) {
if (baseObjects != null) {
ow.sort(RevSort.TOPO);
if (!baseObjects.isEmpty())
ow.sort(RevSort.BOUNDARY, true);
}
for (final ReceiveCommand cmd : commands) {
if (cmd.getResult() != Result.NOT_ATTEMPTED)
continue;
if (cmd.getType() == ReceiveCommand.Type.DELETE)
continue;
ow.markStart(ow.parseAny(cmd.getNewId()));
}
for (final ObjectId have : advertisedHaves) {
RevObject o = ow.parseAny(have);
ow.markUninteresting(o);
if (baseObjects != null && !baseObjects.isEmpty()) {
o = ow.peel(o);
if (o instanceof RevCommit)
o = ((RevCommit) o).getTree();
if (o instanceof RevTree)
ow.markUninteresting(o);
}
}
checking.beginTask(JGitText.get().countingObjects,
ProgressMonitor.UNKNOWN);
RevCommit c;
while ((c = ow.next()) != null) {
checking.update(1);
if (providedObjects != null //
&& !c.has(RevFlag.UNINTERESTING) //
&& !providedObjects.contains(c))
throw new MissingObjectException(c, Constants.TYPE_COMMIT);
}
RevObject o;
while ((o = ow.nextObject()) != null) {
checking.update(1);
if (o.has(RevFlag.UNINTERESTING))
continue;
if (providedObjects != null) {
if (providedObjects.contains(o))
continue;
else
throw new MissingObjectException(o, o.getType());
}
if (o instanceof RevBlob && !db.hasObject(o))
throw new MissingObjectException(o, Constants.TYPE_BLOB);
}
checking.endTask();
if (baseObjects != null) {
for (ObjectId id : baseObjects) {
o = ow.parseAny(id);
if (!o.has(RevFlag.UNINTERESTING))
throw new MissingObjectException(o, o.getType());
}
}
}
}
/** Validate the command list. */
protected void validateCommands() {
for (final ReceiveCommand cmd : commands) {
final Ref ref = cmd.getRef();
if (cmd.getResult() != Result.NOT_ATTEMPTED)
continue;
if (cmd.getType() == ReceiveCommand.Type.DELETE) {
if (!isAllowDeletes()) {
// Deletes are not supported on this repository.
cmd.setResult(Result.REJECTED_NODELETE);
continue;
}
if (!isAllowBranchDeletes()
&& ref.getName().startsWith(Constants.R_HEADS)) {
// Branches cannot be deleted, but other refs can.
cmd.setResult(Result.REJECTED_NODELETE);
continue;
}
}
if (cmd.getType() == ReceiveCommand.Type.CREATE) {
if (!isAllowCreates()) {
cmd.setResult(Result.REJECTED_NOCREATE);
continue;
}
if (ref != null && !isAllowNonFastForwards()) {
// Creation over an existing ref is certainly not going
// to be a fast-forward update. We can reject it early.
//
cmd.setResult(Result.REJECTED_NONFASTFORWARD);
continue;
}
if (ref != null) {
// A well behaved client shouldn't have sent us a
// create command for a ref we advertised to it.
//
cmd.setResult(Result.REJECTED_OTHER_REASON,
JGitText.get().refAlreadyExists);
continue;
}
}
if (cmd.getType() == ReceiveCommand.Type.DELETE && ref != null) {
ObjectId id = ref.getObjectId();
if (id == null) {
id = ObjectId.zeroId();
}
if (!ObjectId.zeroId().equals(cmd.getOldId())
&& !id.equals(cmd.getOldId())) {
// Delete commands can be sent with the old id matching our
// advertised value, *OR* with the old id being 0{40}. Any
// other requested old id is invalid.
//
cmd.setResult(Result.REJECTED_OTHER_REASON,
JGitText.get().invalidOldIdSent);
continue;
}
}
if (cmd.getType() == ReceiveCommand.Type.UPDATE) {
if (ref == null) {
// The ref must have been advertised in order to be updated.
//
cmd.setResult(Result.REJECTED_OTHER_REASON, JGitText.get().noSuchRef);
continue;
}
ObjectId id = ref.getObjectId();
if (id == null) {
// We cannot update unborn branch
cmd.setResult(Result.REJECTED_OTHER_REASON,
JGitText.get().cannotUpdateUnbornBranch);
continue;
}
if (!id.equals(cmd.getOldId())) {
// A properly functioning client will send the same
// object id we advertised.
//
cmd.setResult(Result.REJECTED_OTHER_REASON,
JGitText.get().invalidOldIdSent);
continue;
}
// Is this possibly a non-fast-forward style update?
//
RevObject oldObj, newObj;
try {
oldObj = walk.parseAny(cmd.getOldId());
} catch (IOException e) {
cmd.setResult(Result.REJECTED_MISSING_OBJECT, cmd
.getOldId().name());
continue;
}
try {
newObj = walk.parseAny(cmd.getNewId());
} catch (IOException e) {
cmd.setResult(Result.REJECTED_MISSING_OBJECT, cmd
.getNewId().name());
continue;
}
if (oldObj instanceof RevCommit && newObj instanceof RevCommit) {
try {
if (walk.isMergedInto((RevCommit) oldObj,
(RevCommit) newObj))
cmd.setTypeFastForwardUpdate();
else
cmd.setType(ReceiveCommand.Type.UPDATE_NONFASTFORWARD);
} catch (MissingObjectException e) {
cmd.setResult(Result.REJECTED_MISSING_OBJECT, e
.getMessage());
} catch (IOException e) {
cmd.setResult(Result.REJECTED_OTHER_REASON);
}
} else {
cmd.setType(ReceiveCommand.Type.UPDATE_NONFASTFORWARD);
}
if (cmd.getType() == ReceiveCommand.Type.UPDATE_NONFASTFORWARD
&& !isAllowNonFastForwards()) {
cmd.setResult(Result.REJECTED_NONFASTFORWARD);
continue;
}
}
if (!cmd.getRefName().startsWith(Constants.R_REFS)
|| !Repository.isValidRefName(cmd.getRefName())) {
cmd.setResult(Result.REJECTED_OTHER_REASON, JGitText.get().funnyRefname);
}
}
}
/**
* @return if any commands have been rejected so far.
* @since 3.6
*/
protected boolean anyRejects() {
for (ReceiveCommand cmd : commands) {
if (cmd.getResult() != Result.NOT_ATTEMPTED && cmd.getResult() != Result.OK)
return true;
}
return false;
}
/**
* Set the result to fail for any command that was not processed yet.
* @since 3.6
*/
protected void failPendingCommands() {
for (ReceiveCommand cmd : commands) {
if (cmd.getResult() == Result.NOT_ATTEMPTED)
cmd.setResult(Result.REJECTED_OTHER_REASON, JGitText.get().transactionAborted);
}
}
/**
* Filter the list of commands according to result.
*
* @param want
* desired status to filter by.
* @return a copy of the command list containing only those commands with the
* desired status.
*/
protected List<ReceiveCommand> filterCommands(final Result want) {
return ReceiveCommand.filter(commands, want);
}
/** Execute commands to update references. */
protected void executeCommands() {
List<ReceiveCommand> toApply = filterCommands(Result.NOT_ATTEMPTED);
if (toApply.isEmpty())
return;
ProgressMonitor updating = NullProgressMonitor.INSTANCE;
if (sideBand) {
SideBandProgressMonitor pm = new SideBandProgressMonitor(msgOut);
pm.setDelayStart(250, TimeUnit.MILLISECONDS);
updating = pm;
}
BatchRefUpdate batch = db.getRefDatabase().newBatchUpdate();
batch.setAllowNonFastForwards(isAllowNonFastForwards());
batch.setRefLogIdent(getRefLogIdent());
batch.setRefLogMessage("push", true); //$NON-NLS-1$
batch.addCommand(toApply);
try {
batch.setPushCertificate(getPushCertificate());
batch.execute(walk, updating);
} catch (IOException err) {
for (ReceiveCommand cmd : toApply) {
if (cmd.getResult() == Result.NOT_ATTEMPTED)
cmd.reject(err);
}
}
}
/**
* Send a status report.
*
* @param forClient
* true if this report is for a Git client, false if it is for an
* end-user.
* @param unpackError
* an error that occurred during unpacking, or {@code null}
* @param out
* the reporter for sending the status strings.
* @throws IOException
* an error occurred writing the status report.
*/
protected void sendStatusReport(final boolean forClient,
final Throwable unpackError, final Reporter out) throws IOException {
if (unpackError != null) {
out.sendString("unpack error " + unpackError.getMessage()); //$NON-NLS-1$
if (forClient) {
for (final ReceiveCommand cmd : commands) {
out.sendString("ng " + cmd.getRefName() //$NON-NLS-1$
+ " n/a (unpacker error)"); //$NON-NLS-1$
}
}
return;
}
if (forClient)
out.sendString("unpack ok"); //$NON-NLS-1$
for (final ReceiveCommand cmd : commands) {
if (cmd.getResult() == Result.OK) {
if (forClient)
out.sendString("ok " + cmd.getRefName()); //$NON-NLS-1$
continue;
}
final StringBuilder r = new StringBuilder();
if (forClient)
r.append("ng ").append(cmd.getRefName()).append(" "); //$NON-NLS-1$ //$NON-NLS-2$
else
r.append(" ! [rejected] ").append(cmd.getRefName()).append(" ("); //$NON-NLS-1$ //$NON-NLS-2$
switch (cmd.getResult()) {
case NOT_ATTEMPTED:
r.append("server bug; ref not processed"); //$NON-NLS-1$
break;
case REJECTED_NOCREATE:
r.append("creation prohibited"); //$NON-NLS-1$
break;
case REJECTED_NODELETE:
r.append("deletion prohibited"); //$NON-NLS-1$
break;
case REJECTED_NONFASTFORWARD:
r.append("non-fast forward"); //$NON-NLS-1$
break;
case REJECTED_CURRENT_BRANCH:
r.append("branch is currently checked out"); //$NON-NLS-1$
break;
case REJECTED_MISSING_OBJECT:
if (cmd.getMessage() == null)
r.append("missing object(s)"); //$NON-NLS-1$
else if (cmd.getMessage().length() == Constants.OBJECT_ID_STRING_LENGTH) {
r.append("object "); //$NON-NLS-1$
r.append(cmd.getMessage());
r.append(" missing"); //$NON-NLS-1$
} else
r.append(cmd.getMessage());
break;
case REJECTED_OTHER_REASON:
if (cmd.getMessage() == null)
r.append("unspecified reason"); //$NON-NLS-1$
else
r.append(cmd.getMessage());
break;
case LOCK_FAILURE:
r.append("failed to lock"); //$NON-NLS-1$
break;
case OK:
// We shouldn't have reached this case (see 'ok' case above).
continue;
}
if (!forClient)
r.append(")"); //$NON-NLS-1$
out.sendString(r.toString());
}
}
/**
* Close and flush (if necessary) the underlying streams.
*
* @throws IOException
*/
protected void close() throws IOException {
if (sideBand) {
// If we are using side band, we need to send a final
// flush-pkt to tell the remote peer the side band is
// complete and it should stop decoding. We need to
// use the original output stream as rawOut is now the
// side band data channel.
//
((SideBandOutputStream) msgOut).flushBuffer();
((SideBandOutputStream) rawOut).flushBuffer();
PacketLineOut plo = new PacketLineOut(origOut);
plo.setFlushOnEnd(false);
plo.end();
}
if (biDirectionalPipe) {
// If this was a native git connection, flush the pipe for
// the caller. For smart HTTP we don't do this flush and
// instead let the higher level HTTP servlet code do it.
//
if (!sideBand && msgOut != null)
msgOut.flush();
rawOut.flush();
}
}
/**
* Release any resources used by this object.
*
* @throws IOException
* the pack could not be unlocked.
*/
protected void release() throws IOException {
walk.close();
unlockPack();
timeoutIn = null;
rawIn = null;
rawOut = null;
msgOut = null;
pckIn = null;
pckOut = null;
refs = null;
// Keep the capabilities. If responses are sent after this release
// we need to remember at least whether sideband communication has to be
// used
commands = null;
if (timer != null) {
try {
timer.terminate();
} finally {
timer = null;
}
}
}
/** Interface for reporting status messages. */
static abstract class Reporter {
abstract void sendString(String s) throws IOException;
}
}
