http-push: when making directories, have a trailing slash in the path name

The function lock_remote() sends MKCOL requests to make leading
directories; However, if it does not put a forward slash '/' at the end of
the path, the server sends a 301 redirect.

By leaving the '/' in place, we can avoid this additional step.

Incidentally, at least one version of Curl (7.16.3) does not resend
credentials when it follows a 301 redirect, so this commit also fixes
a bug.

Original patch by Tay Ray Chuan <rctay89@gmail.com>.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

http-push.c

@@ -1201,7 +1201,8 @@ static struct remote_lock *lock_remote(const char *path, long timeout)
 	/* Make sure leading directories exist for the remote ref */
 	ep = strchr(url + strlen(remote->url) + 1, '/');
 	while (ep) {
-		*ep = 0;
+		char saved_character = ep[1];
+		ep[1] = '\0';
 		slot = get_active_slot();
 		slot->results = &results;
 		curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
@@ -1223,7 +1224,7 @@ static struct remote_lock *lock_remote(const char *path, long timeout)
 			free(url);
 			return NULL;
 		}
-		*ep = '/';
+		ep[1] = saved_character;
 		ep = strchr(ep + 1, '/');
 	}
 

t/lib-httpd/apache.conf

@@ -1,6 +1,8 @@
 ServerName dummy
 PidFile httpd.pid
 DocumentRoot www
+LogFormat "%h %l %u %t \"%r\" %>s %b" common
+CustomLog access.log common
 ErrorLog error.log
 
 <IfDefine SSL>

t/t5540-http-push.sh

@@ -76,6 +76,12 @@ test_expect_failure 'create and delete remote branch' '
 	test_must_fail git show-ref --verify refs/remotes/origin/dev
 '
 
+test_expect_success 'MKCOL sends directory names with trailing slashes' '
+
+	! grep "\"MKCOL.*[^/] HTTP/[^ ]*\"" < "$HTTPD_ROOT_PATH"/access.log
+
+'
+
 stop_httpd
 
 test_done