mod_proxy: Avoid AH01059 parsing error for SetHandler "unix:" URLs. PR 69160

The hostname part of the URL is not mandated for UDS though the canon_handler
hooks will require it, so add "localhost" if it's missing (won't be used anyway
for an AF_UNIX socket).

This can trigger with SetHandler "unix:" URLs which are now also fixed up.



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1919015 13f79535-47bb-0310-9956-ffa450edef68

2 files changed, 23 insertions, 4 deletions

diff --git a/changes-entries/pr69160.txt b/changes-entries/pr69160.txt
new file mode 100644
index 0000000000..6bf9942235
--- /dev/null
+++ b/changes-entries/pr69160.txt
@@ -0,0 +1,2 @@
+  *) mod_proxy: Avoid AH01059 parsing error for SetHandler "unix:" URLs.
+     PR 69160 [Yann Ylavic]
diff --git a/modules/proxy/proxy_util.c b/modules/proxy/proxy_util.c
index f7b78439d1..365f501418 100644
--- a/modules/proxy/proxy_util.c
+++ b/modules/proxy/proxy_util.c
@@ -2432,7 +2432,7 @@ PROXY_DECLARE(int) ap_proxy_fixup_uds_filename(request_rec *r)
     if (!strncmp(r->filename, "proxy:", 6) &&
             !ap_cstr_casecmpn(uds_url, "unix:", 5) &&
             (origin_url = ap_strchr(uds_url + 5, '|'))) {
-        char *uds_path = NULL;
+        char *uds_path = NULL, *end;
         apr_uri_t urisock;
         apr_status_t rv;
 
@@ -2444,9 +2444,10 @@ PROXY_DECLARE(int) ap_proxy_fixup_uds_filename(request_rec *r)
                                                   || !urisock.hostname[0])) {
             uds_path = ap_runtime_dir_relative(r->pool, urisock.path);
         }
-        if (!uds_path) {
+        if (!uds_path || !(end = ap_strchr(origin_url, ':'))) {
             ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(10292)
                     "Invalid proxy UDS filename (%s)", r->filename);
+            apr_table_unset(r->notes, "uds_path");
             return HTTP_BAD_REQUEST;
         }
         apr_table_setn(r->notes, "uds_path", uds_path);
@@ -2455,8 +2456,24 @@ PROXY_DECLARE(int) ap_proxy_fixup_uds_filename(request_rec *r)
                 "*: fixup UDS from %s: %s (%s)",
                 r->filename, origin_url, uds_path);
 
-        /* Overwrite the UDS part in place */
-        memmove(uds_url, origin_url, strlen(origin_url) + 1);
+        /* The hostname part of the URL is not mandated for UDS though
+         * the canon_handler hooks will require it, so add "localhost"
+         * if it's missing (won't be used anyway for an AF_UNIX socket).
+         */
+        if (!end[1]) {
+            r->filename = apr_pstrcat(r->pool, "proxy:",
+                                      origin_url, "//localhost",
+                                      NULL);
+        }
+        else if (end[1] == '/' && end[2] == '/' && !end[3]) {
+            r->filename = apr_pstrcat(r->pool, "proxy:",
+                                      origin_url, "localhost",
+                                      NULL);
+        }
+        else {
+            /* Overwrite the UDS part of r->filename in place */
+            memmove(uds_url, origin_url, origin_len + 1);
+        }
         return OK;
     }