import javax.inject.Named;
import javax.inject.Singleton;
import javax.xml.stream.XMLStreamException;

import java.io.IOException;
import java.io.UncheckedIOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashSet;
import java.util.Objects;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;

## `yield` を使った `StreamingResponse` { #a-streamingresponse-with-yield }

path operation 関数で `response_class=StreamingResponse` を宣言すると、`yield` を使ってデータをチャンクごとに順次送信できます。

{* ../../docs_src/stream_data/tutorial001_py310.py ln[1:23] hl[20,23] *}

FastAPI は各データチャンクをそのまま `StreamingResponse` に渡し、JSON などに変換しようとはしません。

### 非 async な path operation 関数 { #non-async-path-operation-functions }

`async` なしの通常の `def` 関数でも同様に `yield` を使えます。

    val persistent: Boolean = cookie.persistent()
    val expiresAt: Long = cookie.expiresAt()
    val hostOnly: Boolean = cookie.hostOnly()
    val domain: String = cookie.domain()
    val path: String = cookie.path()
    val httpOnly: Boolean = cookie.httpOnly()
    val secure: Boolean = cookie.secure()
  }

  @Test @Disabled
  fun formBody() {
    val formBody: FormBody = FormBody.Builder().build()

    assert response.status_code == 200, response.text
    assert response.json() == snapshot(
        {
            "openapi": "3.1.0",
            "info": {"title": "FastAPI", "version": "0.1.0"},
            "paths": {
                "/items/": {
                    "get": {
                        "responses": {
                            "200": {
                                "description": "Successful Response",

    assert response.status_code == 200
    assert response.json() == snapshot(
        {
            "openapi": "3.1.0",
            "info": {"title": "FastAPI", "version": "0.1.0"},
            "paths": {
                "/app": {
                    "get": {
                        "summary": "Read Main",
                        "operationId": "read_main_app_get",
                        "responses": {

            "type" : "long"
          },
          "name" : {
            "type" : "keyword"
          },
          "numOfThread" : {
            "type" : "integer"
          },
          "paths" : {
            "type" : "keyword"
          },
          "permissions" : {
            "type" : "keyword"
          },
          "sortOrder" : {
            "type" : "integer"
          },

async def a():
    pass  # pragma: no cover


openapi_schema = {
    "openapi": "3.1.0",
    "info": {"title": "FastAPI", "version": "0.1.0"},
    "paths": {
        "/a": {
            "get": {
                "responses": {
                    # this is how one would imagine the openapi schema to be

    }

    public void setPaths_Terms(ConditionOptionCall<TermsAggregationBuilder> opLambda) {
        setPaths_Terms("paths", opLambda, null);
    }

    public void setPaths_Terms(ConditionOptionCall<TermsAggregationBuilder> opLambda, OperatorCall<BsFileConfigCA> aggsLambda) {
        setPaths_Terms("paths", opLambda, aggsLambda);
    }

* Tüm süreç framework tarafından **otomatik olarak yönetilir**.
* Tüm bağımlılıklar, request’lerden veri talep edebilir ve *path operation* kısıtlarını ve otomatik dokümantasyonu **zenginleştirebilir**.
* Bağımlılıklarda tanımlanan *path operation* parametreleri için bile **otomatik doğrulama**.
* Karmaşık kullanıcı kimlik doğrulama sistemleri, **veritabanı bağlantıları** vb. için destek.

    return classLoader instanceof URLClassLoader
        ? ((URLClassLoader) classLoader).getURLs()
        : parseJavaClassPath().toArray(new URL[0]);
  }

  /**
   * Returns the URLs in the class path specified by the {@code java.class.path} {@linkplain
   * System#getProperty system property}.
   */
  // TODO(b/65488446): Make this a public API.
  @J2ktIncompatible
  private static ImmutableList<URL> parseJavaClassPath() {