Real root cause from the 3.3.24 diagnostics: the failing upload used CDN
"tr1128ve.cloudatacdn.com/upload/01" — character-for-character the hardcoded
last-resort fallback in _getUploadServer(). The CDN form came back with only
op=upload_result and NO fn/NO st, i.e. the bytes went into a stale node that
returns an empty form. So _getUploadServer can no longer extract the current
upload server (Doodstream likely changed the upload_server response/format) and
silently fell back to a dead node — wasting ~90s/95MB per attempt.
- Remove the silent hardcoded-node fallback; throw a clear error when discovery
fails so the upload fails instantly instead of 90s later with a cryptic msg.
- Embed the raw upload_server response (status, content-type, body) and
upload-page URL hints in the error AND debug log, to pin the format change.
- Tests: getUploadServer JSON path, srv_url HTML fallback, and the no-silent-
fallback throw (asserts the hardcoded node never leaks into the error).
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
52751df735