Escape spaces in HTTP URLs during replication

If the repository name contains spaces (e.g. "-- All Projects --")
the spaces must be URL encoded using the esacpe "%20" in order to
appear in an http:// or https:// URL.

Encoding does *not* happen for ssh:// and git:// protocols as these
both pass-through the remote repository name as-is.

Change-Id: I3bb494c1bc3e21f3a9960071e9930a5ec1c8cf1a
Signed-off-by: Shawn O. Pearce <sop@google.com>

gerrit-server/src/main/java/com/google/gerrit/server/git/PushReplication.java

@@ -50,7 +50,9 @@ import org.slf4j.LoggerFactory;
 
 import java.io.IOException;
 import java.io.OutputStream;
+import java.io.UnsupportedEncodingException;
 import java.net.URISyntaxException;
+import java.net.URLEncoder;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.HashMap;
@@ -531,8 +533,11 @@ public class PushReplication implements ReplicationQueue {
       final List<URIish> r = new ArrayList<URIish>(remote.getURIs().size());
       for (URIish uri : remote.getURIs()) {
         if (matches(uri, urlMatch)) {
-          final String replacedPath =
+          String name = project.get();
-              replace(uri.getPath(), "name", project.get());
+          if (needsUrlEncoding(uri)) {
+            name = encode(name);
+          }
+          String replacedPath = replace(uri.getPath(), "name", name);
           if (replacedPath != null) {
             uri = uri.setPath(replacedPath);
             r.add(uri);
@@ -542,6 +547,27 @@ public class PushReplication implements ReplicationQueue {
       return r;
     }
 
+    static boolean needsUrlEncoding(URIish uri) {
+      return "http".equalsIgnoreCase(uri.getScheme())
+        || "https".equalsIgnoreCase(uri.getScheme())
+        || "amazon-s3".equalsIgnoreCase(uri.getScheme());
+    }
+
+    static String encode(String str) {
+      try {
+        // Some cleanup is required. The '/' character is always encoded as %2F
+        // however remote servers will expect it to be not encoded as part of the
+        // path used to the repository. Space is incorrectly encoded as '+' for this
+        // context. In the path part of a URI space should be %20, but in form data
+        // space is '+'. Our cleanup replace fixes these two issues.
+        return URLEncoder.encode(str, "UTF-8")
+          .replaceAll("%2[fF]", "/")
+          .replace("+", "%20");
+      } catch (UnsupportedEncodingException e) {
+        throw new RuntimeException(e);
+      }
+    }
+
     String[] getAdminUrls() {
       return this.adminUrls;
     }

gerrit-server/src/test/java/com/google/gerrit/server/git/PushReplicationTest.java

@@ -0,0 +1,42 @@
+// Copyright (C) 2011 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package com.google.gerrit.server.git;
+
+import static com.google.gerrit.server.git.PushReplication.ReplicationConfig.*;
+import junit.framework.TestCase;
+
+import org.eclipse.jgit.transport.URIish;
+
+import java.net.URISyntaxException;
+
+public class PushReplicationTest extends TestCase {
+  public void testNeedsUrlEncoding() throws URISyntaxException {
+    assertTrue(needsUrlEncoding(new URIish("http://host/path")));
+    assertTrue(needsUrlEncoding(new URIish("https://host/path")));
+    assertTrue(needsUrlEncoding(new URIish("amazon-s3://config/bucket/path")));
+
+    assertFalse(needsUrlEncoding(new URIish("host:path")));
+    assertFalse(needsUrlEncoding(new URIish("user@host:path")));
+    assertFalse(needsUrlEncoding(new URIish("git://host/path")));
+    assertFalse(needsUrlEncoding(new URIish("ssh://host/path")));
+  }
+
+  public void testUrlEncoding() {
+    assertEquals("foo/bar/thing", encode("foo/bar/thing"));
+    assertEquals("--%20All%20Projects%20--", encode("-- All Projects --"));
+    assertEquals("name/with%20a%20space", encode("name/with a space"));
+    assertEquals("name%0Awith-LF", encode("name\nwith-LF"));
+  }
+}