WebサイトまたはAPIが 502 を返す — どうすればよいですか？

import OpenAI from "openai";

const client = new OpenAI({
  apiKey: process.env.APIYI_API_KEY,
  baseURL: "https://api.apiyi.com/v1",
  maxRetries: 0, // disable SDK default retries; the logic below takes over
});

const sleep = (ms) => new Promise((r) => setTimeout(r, ms));

async function chatWithRetry(messages, retries = 2, waitMs = 30_000) {
  for (let attempt = 0; ; attempt++) {
    try {
      return await client.chat.completions.create({
        model: "gpt-4o",
        messages,
      });
    } catch (err) {
      // 502 / 503 and other 5xx: the request never reached the
      // service and is not billed, so retrying is always safe
      if (err.status < 500 || attempt >= retries) throw err;
      await sleep(waitMs); // restarts finish within ~1 min; wait 30s
    }
  }
}

const resp = await chatWithRetry([{ role: "user", content: "Hello" }]);
console.log(resp.choices[0].message.content);

# curl's --retry automatically retries transient errors like 502/503/504
curl https://api.apiyi.com/v1/chat/completions \
  --retry 2 --retry-delay 30 \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gpt-4o",
    "messages": [{"role": "user", "content": "Hello"}]
  }'