# Paramètres de requête et validations de chaînes de caractères

**FastAPI** vous permet de déclarer des informations et des validateurs additionnels pour vos paramètres de requêtes.

Commençons avec cette application pour exemple :

{* ../../docs_src/query_params_str_validations/tutorial001.py hl[9] *}

```Python hl_lines="2"
@app.get('/')
def results():
    results = some_library()
    return results
```

---

If your application (somehow) doesn't have to communicate with anything else and wait for it to respond, use `async def`, even if you don't need to use `await` inside.

---

If you just don't know, use normal `def`.

---

	ProxyRequest                        bool      // only set for GET/HEAD in active-active replication scenario
	ProxyHeaderSet                      bool      // only set for GET/HEAD in active-active replication scenario
	ReplicationRequest                  bool      // true only if replication request
	ReplicationSourceTaggingTimestamp   time.Time // set if MinIOSourceTaggingTimestamp received

    <<online>> status, or else doesn't care.

  * Otherwise, don't bind the mojo. Log a debug message to indicate that it is
    sensitive the online state of the application, and that this state is
    currently wrong for execution.

    <<NOTE:>> Do we want to fail when we cannot bind a mojo to the lifecycle
    because of offline/online status? That would probably indicate that the user

INFO:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
INFO:     Started reloader process [28720]
INFO:     Started server process [28722]
INFO:     Waiting for application startup.
INFO:     Application startup complete.
```

</div>

<details markdown="1">
<summary><code>uvicorn main:app --reload</code> 명령에 관하여...</summary>

명령 `uvicorn main:app`은 다음을 나타냅니다:

### `shutdown` 이벤트

애플리케이션이 종료될 때 실행되어야 하는 함수를 추가하려면, `"shutdown"` 이벤트로 선언합니다:

{* ../../docs_src/events/tutorial002.py hl[6] *}

여기서, `shutdown` 이벤트 핸들러 함수는 `"Application shutdown"`이라는 텍스트를 `log.txt` 파일에 기록합니다.

/// info | 정보

`open()` 함수에서 `mode="a"`는 "추가"를 의미하므로, 파일에 있는 기존 내용은 덮어쓰지 않고 새로운 줄이 추가됩니다.

///

/// tip | 팁

ceRa Addresses that are allowed when service is LoadBalancer ## https://kubernetes.io/docs/tasks/access-application-cluster/configure-cloud-provider-firewall/#restrict-access-for-loadbalancer-service ## #loadBalancerSourceRa: # - 10.10.10.0/24 loadBalancerSourceRa: [] ## service.externalTrafficPolic minio service external traffic policy ## ref http://kubernetes.io/docs/tasks/access-application-cluster/create-external-load-balancer/#preserving-the-client-source-ip ## externalTrafficPolic: Cluster...

INFO:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
INFO:     Started reloader process [28720]
INFO:     Started server process [28722]
INFO:     Waiting for application startup.
INFO:     Application startup complete.
```

</div>

<details markdown="1">
<summary><code>uvicorn main:app --reload</code>コマンドについて</summary>

`uvicorn main:app`コマンドは以下の項目を参照します:

	// Assume roles with no JWT, handles AssumeRole.
	stsRouter.Methods(http.MethodPost).MatcherFunc(func(r *http.Request, rm *mux.RouteMatch) bool {
		ctypeOk := wildcard.MatchSimple("application/x-www-form-urlencoded*", r.Header.Get(xhttp.ContentType))
		authOk := wildcard.MatchSimple(signV4Algorithm+"*", r.Header.Get(xhttp.Authorization))
		noQueries := len(r.URL.RawQuery) == 0
		return ctypeOk && authOk && noQueries

ceRa Addresses that are allowed when service is LoadBalancer ## https://kubernetes.io/docs/tasks/access-application-cluster/configure-cloud-provider-firewall/#restrict-access-for-loadbalancer-service ## #loadBalancerSourceRa: # - 10.10.10.0/24 loadBalancerSourceRa: [] ## service.externalTrafficPolic minio service external traffic policy ## ref http://kubernetes.io/docs/tasks/access-application-cluster/create-external-load-balancer/#preserving-the-client-source-ip ## externalTrafficPolic: Cluster...