Allow empty Host: header arguments.

Previously, request that sent:

GET / HTTP/1.1
Host:

would get a 400.  RFC 2616 specifically allows for a "blank" host field.

The read_request code properly handled this, but the fix_hostname in
vhost.c would cause the 400.  Now, simply return in fix_hostname when
we see a blank hostname rather than erroring out.

PR: 7441

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@94655 13f79535-47bb-0310-9956-ffa450edef68

diff --git a/server/vhost.c b/server/vhost.c
index 07ea8c4f5e7a908a697ea852a947044655258311..03e89481cfa4f57f96398c3ee8623ab733adddb5 100644 (file)
--- a/server/vhost.c
+++ b/server/vhost.c
@@ -745,6 +745,11 @@ static void fix_hostname(request_rec *r)
     apr_port_t port;
     apr_status_t rv;
 
+    /* According to RFC 2616, Host header field CAN be blank. */
+    if (!*r->hostname) {
+        return;
+    }
+
     rv = apr_parse_addr_port(&host, &scope_id, &port, r->hostname, r->pool);
     if (rv != APR_SUCCESS || scope_id) {
         goto bad;