ui-repolist: return HTTP 404 if no repositories found

Return HTTP status code 404 Not found when querying a non-existent
repository, which signals to search engines that a repository no
longer exists. Further, some webservers such as nginx permit
logging requests to different files depending on the HTTP code.

Signed-off-by: Peter Colberg <peter@colberg.org>

1 files changed, 17 insertions, 3 deletions

diff --git a/ui-repolist.c b/ui-repolist.c
index 4912fa5..6010a39 100644
--- a/ui-repolist.c
+++ b/ui-repolist.c
@@ -115,6 +115,17 @@ static int is_visible(struct cgit_repo *repo)
         return 1;
 }
 
+static int any_repos_visible(void)
+{
+        int i;
+
+        for (i = 0; i < cgit_repolist.count; i++) {
+                if (is_visible(&cgit_repolist.repos[i]))
+                        return 1;
+        }
+        return 0;
+}
+
 static void print_sort_header(const char *title, const char *sort)
 {
         char *currenturl = cgit_currenturl();
@@ -266,6 +277,11 @@ void cgit_print_repolist(void)
         char *section;
         int sorted = 0;
 
+        if (!any_repos_visible()) {
+                cgit_print_error_page(404, "Not found", "No repositories found");
+                return;
+        }
+
         if (ctx.cfg.enable_index_links)
                 ++columns;
         if (ctx.cfg.enable_index_owner)
@@ -347,9 +363,7 @@ void cgit_print_repolist(void)
                 html("</tr>\n");
         }
         html("</table>");
-        if (!hits)
-                cgit_print_error("No repositories found");
-        else if (hits > ctx.cfg.max_repo_count)
+        if (hits > ctx.cfg.max_repo_count)
                 print_pager(hits, ctx.cfg.max_repo_count, ctx.qry.search, ctx.qry.sort);
         cgit_print_docend();
 }