## URL-адрес OpenAPI { #openapi-url }

По умолчанию схема OpenAPI отображена по адресу `/openapi.json`.

Но вы можете изменить это с помощью параметра `openapi_url`.

К примеру, чтобы задать её отображение по адресу `/api/v1/openapi.json`:

{* ../../docs_src/metadata/tutorial002_py39.py hl[3] *}

这里的查询参数 `needy` 是类型为 `str` 的必选查询参数。

在浏览器中打开如下 URL：

```
http://127.0.0.1:8000/items/foo-item
```

……因为路径中没有必选参数 `needy`，返回的响应中会显示如下错误信息：

```JSON
{
    "detail": [
        {
            "loc": [
                "query",
                "needy"
            ],
            "msg": "field required",
            "type": "value_error.missing"

        headers=headers,
        timeout=settings.httpx_timeout,
        json={"query": query, "variables": variables, "operationName": "Q"},
    )
    if response.status_code != 200:
        logging.error(f"Response was not 200, after: {after}")
        logging.error(response.text)
        raise RuntimeError(response.text)
    data = response.json()
    if "errors" in data:

				xhttp.ContentType:                "application/json",
			},
		},
		{
			name: "someempty",
			arg: map[string]string{
				xhttp.AmzRestore:                 "",
				xhttp.ContentMD5:                 mustGetUUID(),
				xhttp.AmzBucketReplicationStatus: "",
				xhttp.ContentType:                "application/json",
			},
		},
	}
	for _, tt := range tests {

----------------

This program posts data to a service. [Full source][post_example].

```java
public static final MediaType JSON = MediaType.get("application/json");

OkHttpClient client = new OkHttpClient();

String post(String url, String json) throws IOException {
  RequestBody body = RequestBody.create(json, JSON);
  Request request = new Request.Builder()
      .url(url)
      .post(body)
      .build();

	if context, ok := h[xhttp.AmzServerSideEncryptionKmsContext]; ok {
		b, err := base64.StdEncoding.DecodeString(context[0])
		if err != nil {
			return "", nil, err
		}

		json := jsoniter.ConfigCompatibleWithStandardLibrary
		if err := json.Unmarshal(b, &ctx); err != nil {
			return "", nil, err
		}
	}

	keyID := h.Get(xhttp.AmzServerSideEncryptionKmsID)

        assert items == {"foo": {"name": "Fighters"}, "bar": {"name": "Tenders"}}

        response = client.get("/items/foo")
        assert response.status_code == 200
        assert response.json() == {"name": "Fighters"}

        # After the requests is done, the items are still there
        assert items == {"foo": {"name": "Fighters"}, "bar": {"name": "Tenders"}}

/.settings/
.project
.classpath
*.iml
.idea
.vscode
.DS_Store
/plugins/
/modules/
/tomcat.8080/
dbflute_fess/output/doc/lastadoc-fess.html
dbflute_fess/schema/project-lastadoc-fess.json
src/main/resources/fess_indices/fess_config.access_token/access_token.bulk
src/main/resources/ga_client_secrets.p12
src/main/webapp/WEB-INF/project.properties
/.apt_generated/
/.apt_generated_tests/
/.serena

```txt
Hello, World from Flask!
```

Eğer <a href="http://localhost:8000/v2/" class="external-link" target="_blank">http://localhost:8000/v2/</a> adresine giderseniz, FastAPI'dan gelen yanıtı göreceksiniz:

```JSON
{
    "message": "Hello World"
}

	}
	w.Flush()
	return w.Error()
}

// WriteJSON - encodes to JSON data.
func (r *Record) WriteJSON(writer io.Writer) error {
	var kvs jstream.KVS = make([]jstream.KV, 0, len(r.columnNames))
	for i, cn := range r.columnNames {
		if i < len(r.csvRecord) {
			kvs = append(kvs, jstream.KV{Key: cn, Value: r.csvRecord[i]})
		}
	}
	return json.NewEncoder(writer).Encode(kvs)
}