Bug: Sentry provider validate_scopes crashes on empty response body from /plugins/webhooks/

[apercivall]

Description

Clicking "Validate Scopes" on the Sentry provider fails with "Failed to revalidate scopes". All scopes show "Not checked" even though the provider is connected and pulling alerts successfully.

Root Cause

In sentry_provider.py line ~208, the project:write scope validation sends a POST to:

{sentry_api}/projects/{org}/{project}/plugins/webhooks/

Sentry returns 404 with an empty HTML body (Content-Type: text/html, body length: 0). This is likely because the legacy plugins API has been deprecated.

The code then calls response.json() without checking for an empty body:

if not response.ok:
    response_json = response.json()  # JSONDecodeError: empty body

The exception is unhandled, so it propagates up and kills the entire validation — causing ALL scopes to show "Not checked", not just project:write.

Suggested Fix

if not response.ok:
    try:
        response_json = response.json()
        validated_scopes[scope.name] = response_json.get("detail")
    except (requests.exceptions.JSONDecodeError, ValueError):
        validated_scopes[scope.name] = f"HTTP {response.status_code}"
    continue

This pattern should be applied to all scope checks in validate_scopes (event:read, project:read, project:write).

Additionally, the /plugins/webhooks/ endpoint may need updating since Sentry has been deprecating the legacy plugin system.

Environment

• Keep version: 0.54.3
• Sentry: SaaS (sentry.io)
• Provider mode: Pull (60-min interval)
• Provider status: Connected, pulling alerts successfully