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Make Query requests idempotent #1022

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merged 3 commits into from Apr 13, 2022
Merged

Make Query requests idempotent #1022

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24c0864
Make Query requests idempotent
dohnto Apr 7, 2022
7016fd3
Use empty header
dohnto Apr 8, 2022
5588f73
Document issue with original documentation
dohnto Apr 12, 2022
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3 changes: 3 additions & 0 deletions api/prometheus/v1/api.go
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Expand Up @@ -1138,6 +1138,9 @@ func (h *apiClientImpl) DoGetFallback(ctx context.Context, u *url.URL, args url.
return nil, nil, nil, err
}
req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
// Underlying `net.http` library automatically retries` idempotent requests when connectivity issues are hit.
// POST requests are not considered idempotent by default, so we need to explicitly mark them as such.
req.Header.Set("Idempotency-Key", "TODO")
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resp, body, warnings, err := h.Do(ctx, req)
if resp != nil && (resp.StatusCode == http.StatusMethodNotAllowed || resp.StatusCode == http.StatusNotImplemented) {
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