return response.body().string();
  }
}
```


Post to a Server
----------------

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);

The user of your API (an external developer) will create an invoice in your API with a POST request.

Then your API will (let's imagine):

* Send the invoice to some customer of the external developer.
* Collect the money.
* Send a notification back to the API user (the external developer).
    * This will be done by sending a POST request (from *your API*) to some *external API* provided by that external developer (this is the "callback").

O usuário da sua API (um desenvolvedor externo) criará uma fatura na sua API com um request POST.

Então sua API irá (vamos imaginar):

* Enviar a fatura para algum cliente do desenvolvedor externo.
* Coletar o dinheiro.
* Enviar a notificação de volta para o usuário da API (o desenvolvedor externo).
    * Isso será feito enviando um request POST (de *sua API*) para alguma *API externa* fornecida por esse desenvolvedor externo (este é o "callback").

これをヘッダーパラメータとして受け取り、クライアントが離脱した位置からストリームを再開できます:

{* ../../docs_src/server_sent_events/tutorial004_py310.py hl[25,27,31] *}

## POST での SSE { #sse-with-post }

SSE は `GET` だけでなく、**任意の HTTP メソッド**で動作します。

これは、`POST` 上で SSE をストリーミングする [MCP](https://modelcontextprotocol.io) のようなプロトコルで有用です:

{* ../../docs_src/server_sent_events/tutorial005_py310.py hl[14] *}

## 技術詳細 { #technical-details }

     * @param body the request body containing stopwords item information
     * @return JSON response with result status
     */
    // POST /api/admin/dict/stopwords/setting/{dictId}
    @Execute
    public JsonResponse<ApiResult> post$setting(final String dictId, final CreateBody body) {
        body.dictId = dictId;
        validateApi(body, messages -> {});
        body.crudMode = CrudMode.CREATE;

Якщо ви хочете дізнатися більше про ці типи кодування та формові поля, ознайомтеся з [<abbr title="Mozilla Developer Network - Мережа Розробників Mozilla">MDN</abbr> web docs для `POST`](https://developer.mozilla.org/en-US/docs/Web/HTTP/Methods/POST).

///

/// warning | Попередження

        var pos = startAfterIntro
        var pastBlankLine = false
        for (line in lines) {
            if (pastBlankLine && !line.startsWith("- ") && line.isNotBlank()) {
                return pos
            }
            if (line.isNotBlank()) {
                pastBlankLine = true
            }
            pos += line.length + 1 // +1 for the newline
        }

    /**
     * Creates a new role setting.
     *
     * @param body the role data to create
     * @return JSON response containing the created role setting ID
     */
    // POST /api/admin/role/setting
    @Execute
    public JsonResponse<ApiResult> post$setting(final CreateBody body) {
        validateApi(body, messages -> {});
        body.crudMode = CrudMode.CREATE;
        final Role entity = getRole(body).orElseGet(() -> {

            } else if (state == DfsState.VISITING) {
                // we are already visiting this vertex, this mean we have a cycle
                int pos = cycle.lastIndexOf(v.label);
                List<String> ret = cycle.subList(pos, cycle.size());
                ret.add(v.label);
                return ret;
            }
        }
        return null;
    }

    static class Vertex {

          @Subscribe
          public void accept(String str) {
            holder.set(str);
            deliveries.incrementAndGet();
          }
        });

    String EVENT = "Hello!";
    bus.post(EVENT);

    assertEquals("Only one event should be delivered.", 1, deliveries.get());
    assertWithMessage("Correct string should be delivered.").that(holder.get()).isEqualTo(EVENT);
  }