fix(google-drive): add auto export format and validate against Drive API docs

[waleedlatif1]

Summary

• Add "Auto" default option to Google Drive download export format dropdown — picks the best format for the file type automatically (e.g. CSV for Sheets, plain text for Docs)
• Sanitize auto value in block params so it can't leak to create_file/upload operations
• Add VALID_EXPORT_FORMATS map based on Google Drive API docs to validate requested formats before calling the API
• Return clear error with supported formats list when an incompatible format is requested
• Fix DEFAULT_EXPORT_FORMATS for Forms (application/zip not application/pdf) and Apps Script (application/vnd.google-apps.script+json not application/json)

Type of Change

• Bug fix
• Improvement

Testing

Tested manually

Checklist

• Code follows project style guidelines
• Self-reviewed my changes
• Tests added/updated and passing
• No new warnings introduced
• I confirm that I have read and agree to the terms outlined in the Contributor License Agreement (CLA)

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1 Skipped Deployment

Project	Deployment	Actions	Updated (UTC)
docs	Skipped		Apr 14, 2026 10:09pm

[cursor]

PR Summary

Medium Risk
Moderate risk: changes download/export behavior by defaulting to an auto export mode and rejecting unsupported export MIME types with new 400 responses, which could affect existing workflows relying on permissive behavior.

Overview
Google Drive download now supports an auto export format that maps Google Workspace files to a per-type default export MIME type, and the block UI defaults the Export Format dropdown to auto.

The download API now validates requested export formats against a new VALID_EXPORT_FORMATS allowlist (derived from Drive docs) and returns a clear 400 error listing supported formats when incompatible formats are requested; it also corrects default export formats for Forms and Apps Script.

^{Reviewed by Cursor Bugbot for commit 291b2ee. Configure here.}

[greptile-apps]

Greptile Summary

Fixes two incorrect DEFAULT_EXPORT_FORMATS entries (Forms → application/zip, Apps Script → application/vnd.google-apps.script+json), adds a VALID_EXPORT_FORMATS map sourced from Google Drive API docs to validate export requests before hitting the API, and introduces an "Auto" default that selects the best format per file type while sanitizing the sentinel value in both the block params and the route handler.

Confidence Score: 5/5

Safe to merge — all format fixes are correct per Google Drive API docs and the validation logic is sound.

All remaining findings are P2 UX suggestions. The core bug fixes (Forms/Apps Script default formats) are verified against the official docs, the validation logic correctly guards against invalid API calls, and the auto sanitization works correctly through both code paths. No data loss or runtime errors introduced.

apps/sim/blocks/blocks/google_drive.ts — the dropdown's HTML option will now surface a validation error for Sheets/Slides since the expected format is application/zip, not text/html.

Important Files Changed

Filename	Overview
apps/sim/tools/google_drive/utils.ts	Adds VALID_EXPORT_FORMATS map per Google Drive API docs; corrects DEFAULT_EXPORT_FORMATS for Forms (zip) and Apps Script (script+json). All 6 Workspace types are covered and default formats pass their own validation.
apps/sim/app/api/tools/google_drive/download/route.ts	Adds pre-flight VALID_EXPORT_FORMATS check before calling Google's export API; sanitizes auto sentinel to null. Double-sanitization with the block's params function is intentional defense-in-depth.
apps/sim/blocks/blocks/google_drive.ts	Adds "Auto" as default export format and converts auto → undefined in params. The HTML dropdown option will now produce a validation error for Sheets/Slides since text/html is not in VALID_EXPORT_FORMATS for those types; application/zip is missing from the dropdown.

_{Reviews (3): Last reviewed commit: "fix(google-drive): add text/markdown to ..." | Re-trigger Greptile}

[waleedlatif1]

@greptile

[waleedlatif1]

@cursor review

[waleedlatif1]

@greptile

[waleedlatif1]

@cursor review

[cursor]

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^{Reviewed by Cursor Bugbot for commit 291b2ee. Configure here.}