Errors and retries

# curl sends the same headers on every retry, so the Idempotency-Key stays the same.
curl https://api.travixorglobal.com/v1/orders \
  --retry 5 --retry-all-errors --retry-delay 2 \
  -H "Authorization: Bearer $TRAVIXOR_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: 6b0f2c1e-8d4a-4c7e-9b53-1f2a7d90e4c8" \
  -d '{"quote_id": "QUOTE_ID"}'

// Retries a request only when it is safe: a network failure, a timeout, a 5xx, or a 429.
// For POST /v1/orders it is safe because every attempt carries the same Idempotency-Key.
async function sendWithRetry(url: string, init: RequestInit, attempts = 5): Promise<Response> {
  for (let attempt = 1; ; attempt++) {
    try {
      const res = await fetch(url, { ...init, signal: AbortSignal.timeout(30_000) })
      const retryable = res.status === 429 || res.status >= 500
      if (!retryable || attempt === attempts) return res
      const wait = Number(res.headers.get('retry-after')) || 2 ** attempt
      await new Promise((resolve) => setTimeout(resolve, wait * 1000))
    } catch (error) {
      if (attempt === attempts) throw error
      await new Promise((resolve) => setTimeout(resolve, 2 ** attempt * 1000))
    }
  }
}

const res = await sendWithRetry('https://api.travixorglobal.com/v1/orders', {
  method: 'POST',
  headers: {
    authorization: `Bearer ${process.env.TRAVIXOR_API_KEY}`,
    'content-type': 'application/json',
    'idempotency-key': '6b0f2c1e-8d4a-4c7e-9b53-1f2a7d90e4c8',
  },
  body: JSON.stringify({ quote_id: 'QUOTE_ID' }),
})
console.log(res.status, await res.json())

import os
import time

import requests


def send_with_retry(method, url, attempts=5, **kwargs):
    """Retries only when it is safe: a network failure, a timeout, a 5xx, or a 429.
    For POST /v1/orders it is safe because every attempt carries the same Idempotency-Key."""
    for attempt in range(1, attempts + 1):
        try:
            res = requests.request(method, url, timeout=30, **kwargs)
        except (requests.ConnectionError, requests.Timeout):
            if attempt == attempts:
                raise
            time.sleep(2**attempt)
            continue
        if (res.status_code == 429 or res.status_code >= 500) and attempt < attempts:
            time.sleep(int(res.headers.get("Retry-After", 2**attempt)))
            continue
        return res


res = send_with_retry(
    "POST",
    "https://api.travixorglobal.com/v1/orders",
    headers={
        "Authorization": f"Bearer {os.environ['TRAVIXOR_API_KEY']}",
        "Idempotency-Key": "6b0f2c1e-8d4a-4c7e-9b53-1f2a7d90e4c8",
    },
    json={"quote_id": "QUOTE_ID"},
)
print(res.status_code, res.json())