# Provider 返回连续 5 次合法空结果后，Routing 从 A 原子前进到 B。
version: 1
security: {requireProtectionOnPublicListen: true}
gateway: {enabled: true, listen: '127.0.0.1:8080', auth: {mode: none}}
routing:
  - name: sequential-gateway
    enabled: true
    purpose: gateway
    match: {hostRegex: '.*'}
    upstreams: [provider-a, provider-b]
    strategy:
      type: sequential
      switchAfterEmptyFetch: 5
      endBehavior: stayLast
    onUnavailable: {action: reject}
upstreams:
  provider-a:
    enabled: true
    exposure: [gateway]
    provider: {billingMode: fetch, protocols: [http]}
    api: {url: https://provider-a.example/proxies, method: GET, auth: {type: none}, template: '{{.}}'}
    proxyAuth: {type: response}
    pool: {maxSize: 500}
    capacity: {maxConcurrencyPerProxy: 10}
    refill: {reconcileInterval: 1s, minimumAvailableSlots: 25, targetAvailableSlots: 50}
    lifecycle: {ttl: 2m, allocationSafetyMargin: 15s}
    fetch: {estimatedIPsPerCall: 10, requestInterval: 1s, timeout: 3s, maxAttempts: 3, maxInFlight: 1, maxTotal: 10000}
    check: {interval: 30s, jitter: 20, maxInFlight: 100, timeout: 2s, maxAttempts: 2, maxConsecutiveFailures: 3}
  provider-b:
    enabled: true
    exposure: [gateway]
    provider: {billingMode: subscription, protocols: [http]}
    api: {url: https://provider-b.example/proxies, method: GET, auth: {type: none}, template: '{{.}}'}
    proxyAuth: {type: response}
    pool: {maxSize: 500}
    capacity: {maxConcurrencyPerProxy: 10}
    refill: {reconcileInterval: 1s, minimumAvailableSlots: 25, targetAvailableSlots: 50}
    lifecycle: {ttl: 3m, allocationSafetyMargin: 15s}
    fetch: {estimatedIPsPerCall: 10, requestInterval: 2s, timeout: 3s, maxAttempts: 3, maxInFlight: 1}
    check: {interval: 30s, jitter: 20, maxInFlight: 100, timeout: 2s, maxAttempts: 2, maxConsecutiveFailures: 3}