From: Stefan Eissing <icing@apache.org>
Date: Thu, 23 Sep 2021 12:31:53 +0000 (+0000)
Subject: backport of 1893519,1893532 from trunk:
X-Git-Tag: candidate-2.4.50-rc1~28
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=81a8b0133b46c4cf7dfc4b5476ad46eb34aa0a5c;p=thirdparty%2Fapache%2Fhttpd.git

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
---

diff --git a/changes-entries/uds_empty_hostname.txt b/changes-entries/uds_empty_hostname.txt
new file mode 100644
index 00000000000..beff3023e90
--- /dev/null
+++ b/changes-entries/uds_empty_hostname.txt
@@ -0,0 +1,2 @@
+  *) mod_proxy: Handle UDS URIs with empty hostname ("unix:///...") as if they
+     had no hostname ("unix:/...").  [Yann Ylavic]
\ No newline at end of file
diff --git a/modules/mappers/mod_rewrite.c b/modules/mappers/mod_rewrite.c
index 8adc92c7253..80fbc9e84ff 100644
--- a/modules/mappers/mod_rewrite.c
+++ b/modules/mappers/mod_rewrite.c
@@ -622,7 +622,7 @@ static unsigned is_absolute_uri(char *uri, int *supportsqs)
     case 'U':
         if (!ap_cstr_casecmpn(uri, "nix:", 4)) {        /* unix:     */
             *sqs = 1;
-            return 5;
+            return (uri[4] == '/' && uri[5] == '/') ? 7 : 5;
         }
     }
 
diff --git a/modules/proxy/proxy_util.c b/modules/proxy/proxy_util.c
index 00ae50fce42..f291a0d55f2 100644
--- a/modules/proxy/proxy_util.c
+++ b/modules/proxy/proxy_util.c
@@ -2291,7 +2291,8 @@ static int fix_uds_filename(request_rec *r, char **url)
         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) {