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liquidraverandClaude Opus 5
b695b979a2
## Problem `handleNodes` runs the geo-filter, `nodeBlacklist`, `hiddenNamePrefixes` and area passes **after** the SQL `LIMIT/OFFSET`, and rewrites `total` to the filtered length. A page that loses a row is therefore short **without being the last page**, and neither the page length nor `total` can tell a client whether to ask for another page. #1606 added the pagination loop and chose the page length as the canonical stop. That is correct only where nothing is ever filtered. Everywhere else the list truncates at the first filtered page boundary and strands every node behind it — the #1598 symptom reached by a different route: a node that is relaying right now simply stops being in the list. The comment at `app.js:240` rejects `total` for exactly the right reason, then picks the signal the same code path also breaks. ## Measured on a live 2346-node deployment Page sizes for the query the map issues: ``` offset=0 returned=500 ← full, loop continues offset=500 returned=499 ← one row filtered AFTER the LIMIT → loop STOPS offset=1000 returned=500 ← never requested offset=1500 returned=500 ← never requested offset=2000 returned=345 ← never requested ``` | stop rule | requests | nodes reached | |---|---:|---:| | short page (master) | 2 | **999** | | `has_more`, else empty page | 6 | **2344** | **1341 nodes, 57%, unreachable through the UI.** ### One hidden node truncates the whole list The deployment this came from has no `geoFilter` (`/api/config/geo-filter` returns `polygon: null`) and no `nodeBlacklist`. It has a single `hiddenNamePrefixes` entry — a deliberate operator choice — and exactly one node whose name starts with it: ``` public_key d4a46ea2…1054 (64 clean hex chars) name 🚫🔥☀️ role repeater last_seen 2026-09-22T10:09:38Z ``` `handleNodes` drops that row in the `IsNameHidden` pass, which runs after the SQL `LIMIT`. The row is counted by the `LIMIT` and by `COUNT(*)`, so the page it lands in comes back exactly one short — and stops every client that treats a short page as the end. Isolated against SQL on the same database, seconds apart: ``` SELECT lower(public_key) FROM nodes ORDER BY last_seen DESC LIMIT 500 OFFSET 500 -> 500 rows GET /api/nodes?limit=500&offset=500 -> 499 rows comm -23 sql.txt api.txt -> d4a46ea2e99cab132a3286ef3d9cce9099318790af7f25671fe83de453721054 ``` Deterministic — `offset=500` returned 499 on three consecutive requests. Not a CDN artifact either: `cf-cache-status: DYNAMIC`, origin `cache-control: no-store`, no `age` header, and four requests with deliberately unique cache keys all returned 499. So **one deliberately hidden node makes 1341 of 2344 nodes unreachable.** The hiding feature does exactly what it was asked to do for that one node, and takes 57% of the network with it, silently. A single `hiddenNamePrefixes` entry is enough; no geo-filter, blacklist or area filter is needed to reach this state. ### The cutoff moves, which is why this reads as intermittent The visible set is the sum of the pages up to and including the first short one, so the boundary sits wherever the unreturnable row currently sorts by `last_seen`, and jumps a whole page as ingest reorders the list. Same deployment, same code, same config, ~2h apart: | dropped row's rank | first short page | nodes visible | |---|---|---:| | inside 0–499 | page 1 | 499 | | inside 500–999 | page 2 | 999 | A node is visible or invisible purely by where it lands relative to that moving line, so affected nodes appear to vanish and return on their own. Two operators on this deployment reported exactly that, independently, while I was measuring. ### A named reproduction `HU-ZA-Lentihegy` (`5287a33f…`), reported missing from the map by an operator whose companion had logged its advert at 04:20 local the same morning. Ingest was fine. The row is in `nodes` with `last_seen` `2026-09-22T02:20:35Z` — the same advert, to the second — valid GPS, role `repeater`, 1033 adverts, and `/api/nodes/search?q=lentihegy` returns it. ``` rank by last_seen : 1081 cutoff at the time: 999 ``` It missed by 82 positions. Walking the same live endpoint, same moment: | stop rule | requests | nodes reached | Lentihegy | |---|---:|---:|---| | short page (master) | 2 | 999 | **not reached** | | `has_more`, else empty page | 6 | 2340 | reached | The practical shape of this on a busy mesh: 1081 nodes had been heard more recently than 9.4 hours, so on that deployment **anything last heard more than ~9 hours ago was invisible**, alive or not. `#/nodes` compounds it — its search box filters client-side over the truncated set, so the server-side `?search=` never runs and an operator cannot find the node by searching for it either, even though the endpoint would return it. ## Change **Server** — `NodeListResponse` gains `has_more`, computed from the raw SQL page against the real `COUNT(*)` before the filter passes run, so it survives them: ```go hasMore := offset+len(nodes) < total ``` Always emitted (no `omitempty`) so a client can tell `false` from an old server. No extra request in the fixed path: `has_more` ends the loop exactly, where the old rule needed a probe page. **Clients** — `app.js` `fetchAllNodes`, `nodes.js` `loadNodes` and `area-map.html`'s inline helper stop on `has_more`, falling back to a zero-length page against a server that predates it. An empty page always ends the loop, so a `has_more` against a concurrently-shrinking table cannot spin to `safetyCap`. Left alone: the three loops are still three copies. Collapsing them onto `fetchAllNodes` is a bigger change than this fix needs, and `nodes.js` has its own inter-page progress UI. Happy to do it separately if you want it. ## Testing - **Unit** (`tests/unit/test-fetch-all-nodes-pagination.js`): the fixture now models the real handler — a row counted by the LIMIT and by `COUNT(*)`, then removed from the page. Three new cases. Fails on the old rule at 499 of 1199. - **E2E** (`tests/e2e/test-map-nodes-pagination-e2e.js`, already wired into `deploy.yml`): the mock drops a page-1 row and emits `has_more`. Mutation-checked — restoring master's stop rule fails 3 of its steps. - **Go** (`cmd/server/nodes_pagination_has_more_test.go`): asserts `has_more` stays true on a page filtering shortened. Mutation-checked — recomputing it after the filter block fails the test. - Full server suite `go test -race`: ok, 41.4s. `gofmt` clean, `go vet` passes. - **Against a real binary**, not just mocks: fixture DB migrated with `corescope-migrate`, `hiddenNamePrefixes: ["SKCE"]`, `limit=3`. Page 1 returns 2 of 3 with `total` rewritten to 2 and `has_more=true`. Walking the real server with master's rule reaches 2 nodes; with `has_more`, all 199 visible of 200, the hidden one still hidden. The real frontend against that server loads 199 with no JS errors. Two existing expectations changed, both deliberate: 1. `surfaces ALL nodes past the 500 server cap` — 3 → 4 requests. That mock emits no `has_more`, so the 200-row final page can no longer end the loop (a short page is exactly what a filtered page looks like) and a zero-length probe follows. Against a current server `has_more` still ends it at 3. 2. `rows missing public_key are NOT collapsed into one` — its stub returned a constant body, which would now be paged to `safetyCap`. It serves one page then empties. Local `test-all.sh` exits 1 on two XSS-gate self-tests (`good-2-tested.js`, `good-4-tested.js`) via a `UnicodeEncodeError` printing an emoji under Windows cp1252. Identical on clean `origin/master` in a scratch worktree, so it is pre-existing and platform-local, not this branch. There is a second identical filter block further down `routes.go` on another list endpoint. Likely the same class; not touched here. If you would rather land your own version of this, say so and I will close mine. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-authored-by: Claude Opus 5 <noreply@anthropic.com>