Method onResponseError

deps/undici/src/lib/interceptor/dns.js:404–455

(controller, err)

  }

  onResponseError (controller, err) {
    switch (err.code) {
      case 'ETIMEDOUT':
      case 'ECONNREFUSED': {
        if (this.#state.dualStack) {
          if (!this.#firstTry) {
            super.onResponseError(controller, err)
            return
          }
          this.#firstTry = false

          // Pick an ip address from the other family
          const otherFamily = this.#newOrigin.hostname[0] === '[' ? 4 : 6
          const ip = this.#state.pickFamily(this.#origin, otherFamily)
          if (ip == null) {
            super.onResponseError(controller, err)
            return
          }

          let port
          if (typeof ip.port === 'number') {
            port = `:${ip.port}`
          } else if (this.#origin.port !== '') {
            port = `:${this.#origin.port}`
          } else {
            port = ''
          }

          const dispatchOpts = {
            ...this.#opts,
            origin: `${this.#origin.protocol}//${
              ip.family === 6 ? `[${ip.address}]` : ip.address
            }${port}`,
            headers: withHostHeader(this.#origin.host, this.#opts.headers)
          }
          this.#dispatch(dispatchOpts, this)
          return
        }

        // if dual-stack disabled, we error out
        super.onResponseError(controller, err)
        break
      }
      case 'ENOTFOUND':
        this.#state.deleteRecords(this.#origin)
        super.onResponseError(controller, err)
        break
      default:
        super.onResponseError(controller, err)
        break
    }
  }
}

module.exports = interceptorOpts => {