fix(gmail-webhook): gmail webhook synchronous processing fix

[aadamgough]

Description

Gmail webhooks waited for the entire workflow before responding, so when workflows got longer Gmail would retry, causing duplications in workflow execution. The process is now asynchronous like the other webhooks, preventing the time-related duplicate executions.

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)

How Has This Been Tested?

I had two curl commands send identical requests with the second command sent 10 seconds after the first, while a 30 second workflow was still processing. This recreated the issue where the polling would timeout which would lead to duplicate triggers. After applying the fix, the first request responded quickly and started background processing, and the second request was caught and returned "duplicate request", which is expected behaviour.

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have added tests that prove my fix is effective or that my feature works
• All tests pass locally and in CI (bun run test)
• My changes generate no new warnings
• Any dependent changes have been merged and published in downstream modules
• I have updated version numbers as needed (if needed)
• I confirm that I have read and agree to the terms outlined in the Contributor License Agreement (CLA)

Security Considerations:

• My changes do not introduce any new security vulnerabilities
• I have considered the security implications of my changes

[vercel]

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Name	Status	Preview	Comments	Updated (UTC)
sim	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jun 26, 2025 6:12pm

1 Skipped Deployment

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[delve-auditor]

✅ No security or compliance issues detected. Reviewed everything up to 489514f.

Security Overview

• 🔎 Scanned files: 1 changed file(s)

Detected Code Changes

Change Type	Relevant files
Enhancement	► route.ts     Move Gmail webhook processing to synchronous flow     Add Gmail deduplication using generic method

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[greptile-apps]

PR Summary

Modified Gmail webhook processing in apps/sim/app/api/webhooks/trigger/[path]/route.ts to handle requests asynchronously, preventing duplicate workflow executions caused by Gmail's timeout retries.

• Changed Gmail webhook handling to return immediately while processing continues in background
• Aligns Gmail webhook behavior with other webhook types for consistent response handling
• Added safeguards against duplicate processing through request deduplication
• Maintains existing security checks including webhook secret validation
• Fixes issue where long-running workflows (>30s) triggered duplicate Gmail webhook executions

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