44 lines
994 B
Go
44 lines
994 B
Go
package embed
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import (
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"bytes"
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"context"
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"net/http"
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"time"
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)
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// postWithRetry sends an HTTP POST request with basic retry and backoff for
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// rate limiting or transient server errors.
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func postWithRetry(ctx context.Context, client *http.Client, url string, body []byte, headers map[string]string) (*http.Response, error) {
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var resp *http.Response
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var err error
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for i := 0; i < 3; i++ {
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req, err := http.NewRequestWithContext(ctx, http.MethodPost, url, bytes.NewReader(body))
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if err != nil {
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return nil, err
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}
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for k, v := range headers {
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req.Header.Set(k, v)
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}
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resp, err = client.Do(req)
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if err != nil {
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if i == 2 {
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return nil, err
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}
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} else if resp.StatusCode == http.StatusTooManyRequests || resp.StatusCode >= 500 {
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if i == 2 {
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return resp, nil
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}
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resp.Body.Close()
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} else {
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return resp, nil
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}
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select {
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case <-ctx.Done():
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return nil, ctx.Err()
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case <-time.After(time.Duration(1<<i) * time.Second):
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}
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}
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return resp, err
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}
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