Direct improvement to the login/web path (no API key needed): we were POSTing a
stale field set — sess_id + utype=reg + file — but doodstream's CURRENT upload
form dropped `utype` and added file_title / fakefilepc / submit_btn. Submitting
an incomplete/stale field set can make the CDN node accept the bytes but skip
the registration step (→ the empty result form with no fn). Now we parse the
live upload form (already fetched in _getUploadServer) and replicate ALL its
non-file fields faithfully — exactly what the browser submits — while keeping
sess_id (the fresh node token) and utype as a harmless compatibility extra.
- _parseUploadFormFields(html): pull every named input/button from the upload
form, excluding the file input (streamed separately). Adapts to whatever
fields doodstream uses now rather than hardcoding.
- upload() builds the multipart from those fields; minimal known-good fallback
if the form wasn't parsed.
- Tests: real-form extraction (incl. file-input exclusion) + no-form safety. 183/183.
Low regression risk (superset of the previously-working fields). Whether it
resolves the large-file empty-form is for the server run; the API path
(3.3.31/32) remains the reliable route when a key is available/derivable.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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