Mr/dashboard stats summary tweak (#592)

* More robust dashboard stats summary

* Updated changelog

* Updated frontend zip archive

2 files changed, 14 insertions, 9 deletions

diff --git a/src/zenserver/frontend/html.zip b/src/zenserver/frontend/html.zip
index bb3d61198..4d6766579 100644
--- a/src/zenserver/frontend/html.zip
+++ b/src/zenserver/frontend/html.zip
diff --git a/src/zenserver/frontend/html/pages/start.js b/src/zenserver/frontend/html/pages/start.js
index d1c13ccc7..fd3778e0a 100644
--- a/src/zenserver/frontend/html/pages/start.js
+++ b/src/zenserver/frontend/html/pages/start.js
@@ -77,6 +77,12 @@ export class Page extends ZenPage
 		}
 
 		// stats
+		const safe_lookup = (obj, path, pretty=undefined) => {
+			const ret = path.split(".").reduce((a,b) => a && a[b], obj);
+			if (ret === undefined) return "-";
+			return pretty ? pretty(ret) : ret;
+		};
+
 		section = this.add_section("stats");
 		columns = [
 			"name",
@@ -90,15 +96,14 @@ export class Page extends ZenPage
 		for (var provider of (await providers)["providers"])
 		{
 			var stats = await new Fetcher().resource("stats", provider).json();
-			var values = [""];
-			try {
-				values.push(stats.requests.count);
-				const size_stat = (stats.store || stats.cache).size;
-				values.push(Friendly.kib(size_stat.disk));
-				values.push(Friendly.kib(size_stat.memory));
-				values.push(stats.cid.size.total);
-			}
-			catch {}
+			var size_stat = (stats.store || stats.cache);
+			var values = [
+				"",
+				safe_lookup(stats, "requests.count"),
+				safe_lookup(size_stat, "size.disk", Friendly.kib),
+				safe_lookup(size_stat, "size.memory", Friendly.kib),
+				safe_lookup(stats, "cid.size.total"),
+			];
 			row = stats_table.add_row(...values);
 			row.get_cell(0).tag().text(provider).on_click((x) => this.view_stat(x), provider);
 		}