# Streaming

## Stream JSON Lines

To stream JSON Lines, declare the return type and use `yield` to return the data.

```python
@app.get("/items/stream")
async def stream_items() -> AsyncIterable[Item]:
    for item in items:
        yield item
```

## Server-Sent Events (SSE)

To stream Server-Sent Events, use `response_class=EventSourceResponse` and `yield` items from the endpoint.

/*
 * Copyright (C) 2014 Square, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,

        .put(path.asRequestBody(fileSystem, MEDIA_TYPE_JSON))
        .build()

    client.newCall(request).execute().use { response ->
      if (!response.isSuccessful) throw IOException("Unexpected code $response")

      fileSystem.sink(path).use {
        response.body.source().readAll(it)
      }

      println(fileSystem.source(path).buffer().readUtf8())
    }
  }

  companion object {

        run: |
          sudo -S rm -rf ${GITHUB_WORKSPACE}
          mkdir ${GITHUB_WORKSPACE}
      - name: checkout-step
        uses: actions/checkout@v4

      - name: setup-go-step
        uses: actions/setup-go@v5
        with:
          go-version: 1.24.x

      - name: github sha short
        id: vars

  }

  /*
   * All the ContiguousSet generators below manually reject nulls here. In principle, we'd like to
   * defer that to Range, since it's ContiguousSet.create() that's used to create the sets. However,
   * that gets messy here, and we already have null tests for Range.
   */

  /*
   * These generators also rely on consecutive integer inputs (not necessarily in order, but no

import static org.apache.maven.cling.utils.CLIReportingUtils.formatDuration;
import static org.apache.maven.cling.utils.CLIReportingUtils.formatTimestamp;

/**
 * Logs execution events to logger, eventually user-supplied.
 *
 */
public class ExecutionEventLogger extends AbstractExecutionListener {
    private static final int MAX_LOG_PREFIX_SIZE = 8; // "[ERROR] "

* 여러분의 모델을 위한 [JSON Schema](https://json-schema.org) 정의를 생성합니다. 여러분의 프로젝트에 적합하다면 여러분이 사용하고 싶은 곳 어디에서나 사용할 수 있습니다.
* 이러한 스키마는, 생성된 OpenAPI 스키마 일부가 될 것이며, 자동 문서화 <abbr title="User Interfaces - 사용자 인터페이스">UIs</abbr>에 사용됩니다.

## 자동 문서화 { #automatic-docs }

모델의 JSON 스키마는 생성된 OpenAPI 스키마에 포함되며 대화형 API 문서에 표시됩니다:

<img src="/img/tutorial/body/image01.png">

/*
 * Copyright (c) 2022 Square, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,

    val message1 = "hello".encodeUtf8()
    val message2 = "hello 2".encodeUtf8()

    DeflaterSink(buffer, Deflater(Deflater.DEFAULT_COMPRESSION, true)).use { sink ->
      sink.write(Buffer().write(message1), message1.size.toLong())
    }
    buffer.writeByte(0x00)
    // Trailing data. We use the Okio segment size to make sure it's still in the input buffer.
    buffer.write(ByteArray(8192))
    inflater.inflate(buffer)

This directory contains test certificates used for testing ssl handling.

These keystores and certificates can be used via applying the `elasticsearch.test-with-ssl` plugin.

The generated certificates are valid till 05. Jun 2030.

The certificates are generated using catch-all SAN in the following procedure:

1. Generate the node's keystore: