BUG: GA4 Pixel GET Route Throwing ValidationErrors

[MackHalliday]

Description

The GA4 pixel tracking endpoint is generating 4xx errors due to various query parameter handling issues. These errors are cluttering logs and affecting tracking accuracy. The primary issues include:

• Query parameters being truncated, removed, or not processed correctly.

• Apple email clients stripping all query parameters from GET requests.

• Validation errors due to unexpected characters or formats in the query parameters (e.g., spaces or malformed URLs).

• [ ] Ticket is understood, and QA has been contacted (if the ticket has a QA label).

Steps to Reproduce

1. View logs here
2. Use body params from 400 errors to test calling endpoint GET /ga4/open-email-tracking and duplicate the error

Impact/Urgency

• Medium This appears to impact a small number of GET requests. Roughly 600 for the 378,000 emails sent

Expected Behavior

• [ ] Ensure the system catches and logs errors when query parameters are modified or stripped
• [ ] Investigate and fix the URL encoding/parsing issues causing schema validation errors
• [ ] Endpoint gracefully returns a 400 if there is a problem with validation

QA Considerations

• Confirm system logs a graceful error when query parameters are modified or stripped

Additional Info & Resources

See slack thread regarding the issue

[npmartin-oddball]

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