1 files changed, 85 insertions, 0 deletions
diff --git a/ep_logout.c b/ep_logout.c
new file mode 100644
index 0000000..6f9bc1d
--- /dev/null
+++ b/ep_logout.c
@@ -0,0 +1,85 @@
+/*
+ * nanobbs, a tiny forums software.
+ * Copyright (C) 2025-2026  Xavier Del Campo Romero
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#define _POSIX_C_SOURCE 200809L
+
+#include "endpoints.h"
+#include "auth.h"
+#include "form.h"
+#include <libweb/http.h>
+#include <stdio.h>
+
+static const char errmsg[] = "Invalid or missing cookie";
+
+static int setup(const struct http_payload *const p,
+    struct http_response *const r, void *const user, sqlite3 *const db,
+    const struct auth_user *const u)
+{
+    static const char date[] = "Thu, 1 Jan 1970 00:00:00 GMT";
+    int ret = -1, error;
+    struct dynstr d;
+
+    dynstr_init(&d);
+
+    if (!u)
+    {
+        ret = form_unauthorized("Authentication required", r);
+        goto end;
+    }
+    else if (dynstr_append(&d, "%s=expired; Expires=%s", u->username, date))
+    {
+        fprintf(stderr, "%s: dynstr_append failed\n", __func__);
+        goto end;
+    }
+
+    *r = (const struct http_response){.status = HTTP_STATUS_SEE_OTHER};
+
+    if (http_response_add_header(r, "Set-Cookie", d.str)
+        || http_response_add_header(r, "Location", "/"))
+    {
+        fprintf(stderr, "%s: http_response_add_header failed\n", __func__);
+        goto end;
+    }
+
+    ret = 0;
+
+end:
+
+    if ((error = sqlite3_close(db)) != SQLITE_OK)
+    {
+        fprintf(stderr, "%s: sqlite3_close: %s\n", __func__,
+            sqlite3_errstr(error));
+        ret = -1;
+    }
+
+    dynstr_free(&d);
+    return ret;
+}
+
+int ep_logout(const struct http_payload *const p,
+    struct http_response *const r, void *const user)
+{
+    int ret = auth_validate(p, r, user, setup);
+
+    if (ret < 0)
+        fprintf(stderr, "%s: auth_validate failed\n", __func__);
+    else if (ret)
+        ret = form_badreq(errmsg, r);
+
+    return ret;
+}