Rate Limits

async function callApi(url, headers, payload, maxRetries = 5) {
  for (let attempt = 0; attempt < maxRetries; attempt++) {
    const response = await fetch(url, {
      method: "POST",
      headers: { "Content-Type": "application/json", ...headers },
      body: JSON.stringify(payload),
    });

    if (response.ok) {
      return await response.json();
    }

    if (response.status === 429) {
      const wait = parseInt(response.headers.get("Retry-After") || "60", 10);
      await new Promise((r) => setTimeout(r, wait * 1000));
      continue;
    }

    if (response.status >= 500) {
      const delay = Math.min(1 * 2 ** attempt + Math.random(), 60);
      await new Promise((r) => setTimeout(r, delay * 1000));
      continue;
    }

    // 4xx errors (other than 429) are not retryable
    throw new Error(`Request failed: ${response.status} ${response.statusText}`);
  }

  throw new Error("Max retries exceeded");
}

// Usage
const result = await callApi(
  "https://api2.rhombussystems.com/api/camera/getMinimalCameraStateList",
  {
    "x-auth-scheme": "api-token",
    "x-auth-apikey": "YOUR_API_KEY",
  },
  {}
);

#!/bin/bash
URL="https://api2.rhombussystems.com/api/camera/getMinimalCameraStateList"
API_KEY="YOUR_API_KEY"
MAX_RETRIES=5

for attempt in $(seq 0 $((MAX_RETRIES - 1))); do
  HTTP_CODE=$(curl -s -o /tmp/response.json -D /tmp/response.headers -w "%{http_code}" \
    -X POST "$URL" \
    -H "Content-Type: application/json" \
    -H "x-auth-scheme: api-token" \
    -H "x-auth-apikey: $API_KEY" \
    -d '{}')

  if [ "$HTTP_CODE" -eq 200 ]; then
    cat /tmp/response.json
    exit 0
  elif [ "$HTTP_CODE" -eq 429 ]; then
    RETRY_AFTER=$(awk 'tolower($1) == "retry-after:" { gsub(/[^0-9]/, "", $2); print $2; exit }' /tmp/response.headers)
    : "${RETRY_AFTER:=60}"
    echo "Rate limited. Waiting ${RETRY_AFTER} seconds..." >&2
    sleep "$RETRY_AFTER"
  elif [ "$HTTP_CODE" -ge 500 ]; then
    DELAY=$(echo "1 * 2^$attempt" | bc)
    [ "$DELAY" -gt 60 ] && DELAY=60
    echo "Server error ($HTTP_CODE). Retrying in ${DELAY}s..." >&2
    sleep "$DELAY"
  else
    echo "Client error ($HTTP_CODE). Not retrying." >&2
    cat /tmp/response.json >&2
    exit 1
  fi
done

echo "Max retries exceeded." >&2
exit 1