// Compute the next set of routes to attempt.
    val routes = mutableListOf<Route>()
    while (hasNextProxy()) {
      // Postponed routes are always tried last. For example, if we have 2 proxies and all the
      // routes for proxy1 should be postponed, we'll move to proxy2. Only after we've exhausted
      // all the good routes will we attempt the postponed routes.
      val proxy = nextProxy()

  val responses = mutableListOf<Response>()
  val routes = mutableListOf<Route>()

  fun onlyResponse() = responses.single()

  fun onlyRoute() = routes.single()

  @Throws(IOException::class)
  override fun authenticate(
    route: Route?,
    response: Response,
  ): Request? {
    if (route == null) throw NullPointerException("route == null")
    responses += response
    routes += route

Although in FastAPI it's optional, and is used mainly to set headers, cookies, and alternative status codes.

///

### <a href="https://moltenframework.com/" class="external-link" target="_blank">Molten</a> { #molten }

I discovered Molten in the first stages of building **FastAPI**. And it has quite similar ideas:

* Based on Python type hints.
* Validation and documentation from these types.
* Dependency Injection system.

    assert response.json() == expected_response


def test_route_classes():
    routes = {}
    for r in app.router.routes:
        assert isinstance(r, Route)
        routes[r.path] = r
    assert getattr(routes["/a/"], "x_type") == "A"  # noqa: B009
    assert getattr(routes["/a/b/"], "x_type") == "B"  # noqa: B009
    assert getattr(routes["/a/b/c/"], "x_type") == "C"  # noqa: B009


def test_openapi_schema():

        title="Custom title",
        version="2.5.0",
        summary="This is a very custom OpenAPI schema",
        description="Here's a longer description of the custom **OpenAPI** schema",
        routes=app.routes,
    )
    openapi_schema["info"]["x-logo"] = {
        "url": "https://fastapi.tiangolo.com/img/logo-margin/logo-teal.png"
    }
    app.openapi_schema = openapi_schema
    return app.openapi_schema

///

You can see the **FastAPI Experts** for:

* [Last Month](#fastapi-experts-last-month) 🤓
* [3 Months](#fastapi-experts-3-months) 😎
* [6 Months](#fastapi-experts-6-months) 🧐
* [1 Year](#fastapi-experts-1-year) 🧑‍🔬
* [**All Time**](#fastapi-experts-all-time) 🧙

### FastAPI Experts - Last Month

    dns.assertRequests(uriHost)
    val routes = selection.routes
    assertRoute(routes[0], address, Proxy.NO_PROXY, dns.lookup(uriHost, 0), uriPort)
    assertRoute(routes[1], address, Proxy.NO_PROXY, dns.lookup(uriHost, 1), uriPort)
    assertThat(selection.next()).isSameInstanceAs(routes[0])
    assertThat(selection.next()).isSameInstanceAs(routes[1])
    assertThat(selection.hasNext()).isFalse()

t),m:Va(d[7],t),s:Va(d[8],t)}):null==r?r={}:"object"==typeof r&&("from"in r||"to"in r)&&(n=function(e,a){var t;if(!e.isValid()||!a.isValid())return{milliseconds:0,months:0};a=Ja(a,e),e.isBefore(a)?t=Ba(e,a):((t=Ba(a,e)).milliseconds=-t.milliseconds,t.months=-t.months);return t}(Ha(r.from),Ha(r.to)),(r={}).ms=n.milliseconds,r.M=n.months),s=new Wa(r),Aa(e)&&h(e,"_locale")&&(s._locale=e._locale),Aa(e)&&h(e,"_isValid")&&(s._isValid=e._isValid),s}function Va(e,a){var t=e&&parseFloat(e.replace(",","."...

///

### <a href="https://moltenframework.com/" class="external-link" target="_blank">Molten</a> { #molten }

Я обнаружил Molten на ранних этапах создания **FastAPI**. И у него были очень похожие идеи:

* Основан на аннотациях типов Python.
* Валидация и документация из этих типов.
* Система внедрения зависимостей.

      pingIntervalMillis = pingIntervalMillis,
      retryOnConnectionFailure = retryOnConnectionFailure,
      call = call,
      routePlanner = routePlanner,
      route = route,
      routes = routes,
      attempt = attempt,
      tunnelRequest = tunnelRequest,
      connectionSpecIndex = connectionSpecIndex,
      isTlsFallback = isTlsFallback,
    )

  override fun connectTcp(): ConnectResult {