From 81a8b0133b46c4cf7dfc4b5476ad46eb34aa0a5c Mon Sep 17 00:00:00 2001
From: Stefan Eissing <icing@apache.org>
Date: Thu, 23 Sep 2021 12:31:53 +0000
Subject: [PATCH] backport of 1893519,1893532 from trunk:

  *) mod_proxy: Handle UDS URIs with empty hostname ("unix:///...") as if they
     had no hostname ("unix:/..."), also in mod_rewrite's is_absolulte_uri().



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1893559 13f79535-47bb-0310-9956-ffa450edef68
---
 modules/mappers/mod_rewrite.c          | 2 +-
 modules/proxy/proxy_util.c             | 3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)
 create mode 100644 changes-entries/uds_empty_hostname.txt

--- a/modules/mappers/mod_rewrite.c
+++ b/modules/mappers/mod_rewrite.c
@@ -622,7 +622,7 @@ static unsigned is_absolute_uri(char *ur
     case 'U':
         if (!ap_cstr_casecmpn(uri, "nix:", 4)) {        /* unix:     */
             *sqs = 1;
-            return 5;
+            return (uri[4] == '/' && uri[5] == '/') ? 7 : 5;
         }
     }
 
--- a/modules/proxy/proxy_util.c
+++ b/modules/proxy/proxy_util.c
@@ -2217,7 +2217,8 @@ static int fix_uds_filename(request_rec
         rv = apr_uri_parse(r->pool, uds_url, &urisock);
         *origin_url++ = '|';
 
-        if (rv == APR_SUCCESS && urisock.path && !urisock.hostname) {
+        if (rv == APR_SUCCESS && urisock.path && (!urisock.hostname
+                                                  || !urisock.hostname[0])) {
             uds_path = ap_runtime_dir_relative(r->pool, urisock.path);
         }
         if (!uds_path) {
