[libsoup] examples/simple-httpd.c: Fix handling of directories

[Emmanuele Bassi <ebassi src gnome org>]

commit a77b81901db248f6d6af26f10ace3af50048db12
Author: Mooffie <mooffie gmail com>
Date:   Fri Jun 15 17:05:37 2018 +0300

    examples/simple-httpd.c: Fix handling of directories
    
    A bug introduced in commit 53a3dd24e5b572fafa79e7cc4cdc4eb17d193e3e (a
    copy/paste mistake has replaced a variable name) causes the example
    httpd to not handle directories correctly.
    
    Additionally, we add a comment recommending programmers to provide a
    descriptive error message. This could give users and programmers a hint
    as to what went wrong.
    
    Fixes #2

 examples/simple-httpd.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)
---
diff --git a/examples/simple-httpd.c b/examples/simple-httpd.c
index 0458203b..ab755b96 100644
--- a/examples/simple-httpd.c
+++ b/examples/simple-httpd.c
@@ -77,6 +77,11 @@ do_get (SoupServer *server, SoupMessage *msg, const char *path)
                        soup_message_set_status (msg, SOUP_STATUS_NOT_FOUND);
                else
                        soup_message_set_status (msg, SOUP_STATUS_INTERNAL_SERVER_ERROR);
+               /* In a real program you should also provide some text explaining the
+                * error to the user (via soup_message_set_response), and include in it
+                * the request path, as otherwise some browsers (Firefox, WebKit) only
+                * show a blank page, confusing the user.
+                */
                return;
        }
 
@@ -96,7 +101,7 @@ do_get (SoupServer *server, SoupMessage *msg, const char *path)
                }
 
                index_path = g_strdup_printf ("%s/index.html", path);
-               if (g_stat (path, &st) != -1) {
+               if (g_stat (index_path, &st) != -1) {
                        do_get (server, msg, index_path);
                        g_free (index_path);
                        return;