From e54d33b6873f0b392640f9200398861210ac9374 Mon Sep 17 00:00:00 2001 From: Nico Sallembien Date: Tue, 9 Feb 2010 09:53:53 -0800 Subject: [PATCH] Add a RefFilter interface to ReceivePack and UploadPack When a user of ReceivePack or UploadPack wants to control what refs are sent to the client, for instance when some refs should be hidden from some clients, this interface can be extended to provide a fine grained control over what refs are sent to the client. Change-Id: Ie6320b0f8922e1a5e1bad91c016bd476ea094366 --- .../eclipse/jgit/transport/ReceivePack.java | 28 ++++++- .../org/eclipse/jgit/transport/RefFilter.java | 76 +++++++++++++++++++ .../eclipse/jgit/transport/UploadPack.java | 30 +++++++- 3 files changed, 129 insertions(+), 5 deletions(-) create mode 100644 org.eclipse.jgit/src/org/eclipse/jgit/transport/RefFilter.java diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/transport/ReceivePack.java b/org.eclipse.jgit/src/org/eclipse/jgit/transport/ReceivePack.java index 35c52bdfe..4d63ee68e 100644 --- a/org.eclipse.jgit/src/org/eclipse/jgit/transport/ReceivePack.java +++ b/org.eclipse.jgit/src/org/eclipse/jgit/transport/ReceivePack.java @@ -126,6 +126,9 @@ public class ReceivePack { /** Identity to record action as within the reflog. */ private PersonIdent refLogIdent; + /** Filter used while advertising the refs to the client. */ + private RefFilter refFilter; + /** Hook to validate the update commands before execution. */ private PreReceiveHook preReceive; @@ -184,6 +187,7 @@ public ReceivePack(final Repository into) { allowDeletes = cfg.allowDeletes; allowNonFastForwards = cfg.allowNonFastForwards; allowOfsDelta = cfg.allowOfsDelta; + refFilter = RefFilter.DEFAULT; preReceive = PreReceiveHook.NULL; postReceive = PostReceiveHook.NULL; } @@ -335,6 +339,26 @@ public void setRefLogIdent(final PersonIdent pi) { refLogIdent = pi; } + /** @return the filter used while advertising the refs to the client */ + public RefFilter getRefFilter() { + return refFilter; + } + + /** + * Set the filter used while advertising the refs to the client. + *

+ * Only refs allowed by this filter will be shown to the client. + * Clients may still attempt to create or update a reference hidden + * by the configured {@link RefFilter}. These attempts should be + * rejected by a matching {@link PreReceiveHook}. + * + * @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 get the hook invoked before updates occur. */ public PreReceiveHook getPreReceiveHook() { return preReceive; @@ -521,7 +545,7 @@ private void service() throws IOException { if (biDirectionalPipe) sendAdvertisedRefs(new PacketLineOutRefAdvertiser(pckOut)); else - refs = db.getAllRefs(); + refs = refFilter.filter(db.getAllRefs()); recvCommands(); if (!commands.isEmpty()) { enableCapabilities(); @@ -589,7 +613,7 @@ public void sendAdvertisedRefs(final RefAdvertiser adv) throws IOException { adv.advertiseCapability(CAPABILITY_REPORT_STATUS); if (allowOfsDelta) adv.advertiseCapability(CAPABILITY_OFS_DELTA); - refs = db.getAllRefs(); + refs = refFilter.filter(db.getAllRefs()); final Ref head = refs.remove(Constants.HEAD); adv.send(refs); if (head != null && !head.isSymbolic()) diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/transport/RefFilter.java b/org.eclipse.jgit/src/org/eclipse/jgit/transport/RefFilter.java new file mode 100644 index 000000000..e46195fc1 --- /dev/null +++ b/org.eclipse.jgit/src/org/eclipse/jgit/transport/RefFilter.java @@ -0,0 +1,76 @@ +/* + * Copyright (C) 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. + */ + +package org.eclipse.jgit.transport; + +import java.util.Map; + +import org.eclipse.jgit.lib.Ref; + +/** + * Filters the list of refs that are advertised to the client. + *

+ * The filter is called by {@link ReceivePack} and {@link UploadPack} to ensure + * that the refs are filtered before they are advertised to the client. + *

+ * This can be used by applications to control visibility of certain refs based + * on a custom set of rules. + */ +public interface RefFilter { + /** The default filter, allows all refs to be shown. */ + public static final RefFilter DEFAULT = new RefFilter() { + public Map filter (final Map refs) { + return refs; + } + }; + + /** + * Filters a {@code Map} of refs before it is advertised to the client. + * + * @param refs + * the refs which this method need to consider. + * @return + * the filtered map of refs. + */ + public Map filter(Map refs); +} diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/transport/UploadPack.java b/org.eclipse.jgit/src/org/eclipse/jgit/transport/UploadPack.java index 57bb2adbf..b76b22b77 100644 --- a/org.eclipse.jgit/src/org/eclipse/jgit/transport/UploadPack.java +++ b/org.eclipse.jgit/src/org/eclipse/jgit/transport/UploadPack.java @@ -131,6 +131,9 @@ public class UploadPack { /** The refs we advertised as existing at the start of the connection. */ private Map refs; + /** Filter used while advertising the refs to the client. */ + private RefFilter refFilter; + /** Capabilities requested by the client. */ private final Set options = new HashSet(); @@ -183,9 +186,10 @@ public UploadPack(final Repository copyFrom) { SAVE.add(ADVERTISED); SAVE.add(WANT); SAVE.add(PEER_HAS); + refFilter = RefFilter.DEFAULT; } - /** @return the repository this receive completes into. */ + /** @return the repository this upload is reading from. */ public final Repository getRepository() { return db; } @@ -233,6 +237,26 @@ public void setBiDirectionalPipe(final boolean twoWay) { biDirectionalPipe = twoWay; } + /** @return the filter used while advertising the refs to the client */ + public RefFilter getRefFilter() { + return refFilter; + } + + /** + * Set the filter used while advertising the refs to the client. + *

+ * Only refs allowed by this filter will be sent to the client. This can + * be used by a server to restrict the list of references the client can + * obtain through clone or fetch, effectively limiting the access to only + * certain refs. + * + * @param refFilter + * the filter; may be null to show all refs. + */ + public void setRefFilter(final RefFilter refFilter) { + this.refFilter = refFilter != null ? refFilter : RefFilter.DEFAULT; + } + /** * Execute the upload task on the socket. * @@ -285,7 +309,7 @@ private void service() throws IOException { if (biDirectionalPipe) sendAdvertisedRefs(new PacketLineOutRefAdvertiser(pckOut)); else { - refs = db.getAllRefs(); + refs = refFilter.filter(db.getAllRefs()); for (Ref r : refs.values()) { try { walk.parseAny(r.getObjectId()).add(ADVERTISED); @@ -329,7 +353,7 @@ public void sendAdvertisedRefs(final RefAdvertiser adv) throws IOException { adv.advertiseCapability(OPTION_THIN_PACK); adv.advertiseCapability(OPTION_NO_PROGRESS); adv.setDerefTags(true); - refs = db.getAllRefs(); + refs = refFilter.filter(db.getAllRefs()); adv.send(refs); adv.end(); }