Closes the SaaS upload gap (#2308) with the unified architecture from
RFC #2312: same code path on local Docker and SaaS, no Docker socket
dependency, no `dockerCli == nil` cliff. Stacked on PR-A (#2313) +
PR-B (#2314).
Before:
Upload → findContainer (nil in SaaS) → 503
After:
Upload → resolve workspaces.url + platform_inbound_secret
→ stream multipart to <url>/internal/chat/uploads/ingest
→ forward response back unchanged
Same call site whether the workspace runs on local docker-compose
("http://ws-<id>:8000") or SaaS EC2 ("https://<id>.<tenant>...").
The bug behind #2308 cannot exist by construction.
Why streaming, not parse-then-re-encode:
* No 50 MB intermediate buffer on the platform
* Per-file size + path-safety enforcement is the workspace's job
(see workspace/internal_chat_uploads.py, PR-B)
* Workspace's error responses (413 with offending filename, 400 on
missing files field, etc.) propagate through unchanged
Changes:
* workspace-server/internal/handlers/chat_files.go — Upload rewritten
as a streaming HTTP proxy. Drops sanitizeFilename, copyFlatToContainer,
and the entire docker-exec path. ChatFilesHandler gains an httpClient
(broken out for test injection). Download stays docker-exec for now;
follow-up PR will migrate it to the same shape.
* workspace-server/internal/handlers/chat_files_external_test.go —
deleted. Pinned the wrong-headed runtime=external 422 gate from
#2309 (already reverted in #2311). Superseded by the proxy tests.
* workspace-server/internal/handlers/chat_files_test.go — replaced
sanitize-filename tests (now in workspace/tests/test_internal_chat_uploads.py)
with sqlmock + httptest proxy tests:
- 400 invalid workspace id
- 404 workspace row missing
- 503 platform_inbound_secret NULL (with RFC #2312 detail)
- 503 workspaces.url empty
- happy-path forward (asserts auth header, content-type forwarded,
body streamed, response propagated back)
- 413 from workspace propagated unchanged (NOT remapped to 500)
- 502 on workspace unreachable (connect refused)
Existing Download + ContentDisposition tests preserved.
* tests/e2e/test_chat_upload_e2e.sh — single-script-everywhere E2E.
Takes BASE as env (default http://localhost:8080). Creates a
workspace, waits for online, mints a test token, uploads a fixture,
reads it back via /chat/download, asserts content matches +
bearer-required. Same script runs against staging tenants (set
BASE=https://<id>.<tenant>.staging.moleculesai.app).
Test plan:
* go build ./... — green
* go test ./internal/handlers/ ./internal/wsauth/ — green (full suite)
* tests/e2e/test_chat_upload_e2e.sh against local docker-compose
after PR-A + PR-B + this PR all merge — TODO before merge
Refs #2312 (parent RFC), #2308 (chat upload 503 incident).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
e632a31347