From 1e0def87fd4c4c5449586a9853255ae6f35ce584 Mon Sep 17 00:00:00 2001
From: link2xt <link2xt@testrun.org>
Date: Mon, 13 Oct 2025 14:51:26 +0000
Subject: [PATCH] feat: cache tile.openstreetmap.org tiles for 7 days

---
 src/net/http.rs | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/net/http.rs b/src/net/http.rs
index 50b6e6964..68dff5fc7 100644
--- a/src/net/http.rs
+++ b/src/net/http.rs
@@ -108,6 +108,13 @@ fn http_url_cache_timestamps(url: &str, mimetype: Option<&str>) -> (i64, i64) {
     let stale = if url.ends_with(".xdc") {
         // WebXDCs are never stale, they just expire.
         expires
+    } else if url.starts_with("https://tile.openstreetmap.org/")
+        || url.starts_with("https://vector.openstreetmap.org/")
+    {
+        // Policy at <https://operations.osmfoundation.org/policies/tiles/>
+        // requires that we cache tiles for at least 7 days.
+        // Do not revalidate earlier than that.
+        now + 3600 * 24 * 7
     } else if mimetype.is_some_and(|s| s.starts_with("image/")) {
         // Cache images for 1 day.
         //