请求速率限制

async function sendWithBackoff(url, headers, payload, maxAttempts = 5) {
  for (let attempt = 0; attempt < maxAttempts; attempt++) {
    const response = await fetch(url, {
      method: "POST",
      headers,
      body: JSON.stringify(payload),
    });
    if (response.status !== 429) return response;
    const retryAfter = Number(response.headers.get("Retry-After") ?? 2 ** attempt);
    await new Promise((resolve) => setTimeout(resolve, retryAfter * 1000));
  }
  throw new Error("rate limited after max retries");
}

import time
import requests

def send_with_backoff(url, headers, payload, max_attempts=5):
    for attempt in range(max_attempts):
        response = requests.post(url, headers=headers, json=payload)
        if response.status_code != 429:
            return response
        retry_after = int(response.headers.get("Retry-After", 2 ** attempt))
        time.sleep(retry_after)
    raise RuntimeError("rate limited after max retries")

func sendWithBackoff(req *http.Request, maxAttempts int) (*http.Response, error) {
	for attempt := range maxAttempts {
		if attempt > 0 && req.Body != nil {
			if req.GetBody == nil {
				return nil, errors.New("request body cannot be replayed")
			}
			body, err := req.GetBody()
			if err != nil {
				return nil, err
			}
			req.Body = body
		}
		resp, err := http.DefaultClient.Do(req)
		if err != nil {
			return nil, err
		}
		if resp.StatusCode != http.StatusTooManyRequests {
			return resp, nil
		}
		resp.Body.Close()
		wait := 1 << attempt
		if s, err := strconv.Atoi(resp.Header.Get("Retry-After")); err == nil {
			wait = s
		}
		time.Sleep(time.Duration(wait) * time.Second)
	}
	return nil, errors.New("rate limited after max retries")
}

function sendWithBackoff(ClientInterface $http, RequestInterface $request, int $maxAttempts = 5): ResponseInterface
{
    for ($attempt = 0; $attempt < $maxAttempts; $attempt++) {
        $response = $http->sendRequest($request);
        if ($response->getStatusCode() !== 429) {
            return $response;
        }
        $retryAfter = (int) ($response->getHeaderLine('Retry-After') ?: 2 ** $attempt);
        sleep($retryAfter);
    }

    throw new RuntimeException('rate limited after max retries');
}