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feat: ErrorPolicySkipped returns 500 instead of upstream status code

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When custom error codes are enabled and the upstream error code is NOT
in the configured list, return HTTP 500 to the client instead of
transparently forwarding the original status code.

Also adds integration test TestCustomErrorCode599 verifying that 429,
500, 503, 401, 403 all return 500 without triggering SetRateLimited
or SetError.
This commit is contained in:
erio
2026-02-09 19:54:54 +08:00
parent 7d66f7ff0d
commit 73f455745c
4 changed files with 125 additions and 12 deletions
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4
backend/internal/service/gemini_messages_compat_service.go
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@@ -839,7 +839,7 @@ func (s *GeminiMessagesCompatService) Forward(ctx context.Context, c *gin.Contex
if upstreamReqID == "" {
upstreamReqID = resp.Header.Get("x-goog-request-id")
}
return nil, s.writeGeminiMappedError(c, account, resp.StatusCode, upstreamReqID, respBody)
return nil, s.writeGeminiMappedError(c, account, http.StatusInternalServerError, upstreamReqID, respBody)
case ErrorPolicyMatched, ErrorPolicyTempUnscheduled:
s.handleGeminiUpstreamError(ctx, account, resp.StatusCode, resp.Header, respBody)
upstreamReqID := resp.Header.Get(requestIDHeader)
@@ -1283,7 +1283,7 @@ func (s *GeminiMessagesCompatService) ForwardNative(ctx context.Context, c *gin.
if contentType == "" {
contentType = "application/json"
}
c.Data(resp.StatusCode, contentType, respBody)
c.Data(http.StatusInternalServerError, contentType, respBody)
return nil, fmt.Errorf("gemini upstream error: %d (skipped by error policy)", resp.StatusCode)
case ErrorPolicyMatched, ErrorPolicyTempUnscheduled:
s.handleGeminiUpstreamError(ctx, account, resp.StatusCode, resp.Header, respBody)