tagClass = tagClass,
      tag = tag,
      codec = codec,
    )
  }

  /** Returns an adapter that returns a list of values of this type. */
  fun asSequenceOf(
    name: String = "SEQUENCE OF",
    tagClass: Int = DerHeader.TAG_CLASS_UNIVERSAL,
    tag: Long = 16L,
  ): BasicDerAdapter<List<T>> {
    val codec =
      object : BasicDerAdapter.Codec<List<T>> {
        override fun encode(

    get() = codec.carrier as? RealConnection ?: error("no connection for CONNECT tunnels")

  internal val isCoalescedConnection: Boolean
    get() = finder.routePlanner.address.url.host != codec.carrier.route.address.url.host

  @Throws(IOException::class)
  fun writeRequestHeaders(request: Request) {
    try {
      eventListener.requestHeadersStart(call)
      codec.writeRequestHeaders(request)

  val tagClass: Int,
  /** The tag this adapter expects, or -1 to match any tag. */
  val tag: Long,
  /** Encode and decode the value once tags are handled. */
  private val codec: Codec<T>,
  /** True if the default value should be used if this value is absent during decoding. */
  val isOptional: Boolean = false,
  /** The value to return if this value is absent. Undefined unless this is optional. */

      check(!requestBodyOpen)
    }

    val exchangeFinder = this.exchangeFinder!!
    val connection = exchangeFinder.find()
    val codec = connection.newCodec(client, chain)
    val result = Exchange(this, eventListener, exchangeFinder, codec)
    this.interceptorScopedExchange = result
    this.exchange = result
    this.withLock {
      this.requestBodyOpen = true
      this.responseBodyOpen = true

    val bouncycastleProvider = "org.bouncycastle:bcprov-jdk18on"
    val bsh = "org.apache-extras.beanshell:bsh"
    val capsule = "io.usethesource:capsule"
    val commonsCodec = "commons-codec:commons-codec"
    val commonsCompress = "org.apache.commons:commons-compress"
    val commonsHttpclient = "org.apache.httpcomponents:httpclient"
    val commonsIo = "commons-io:commons-io"

 */
internal object Adapters {
  val BOOLEAN =
    BasicDerAdapter(
      name = "BOOLEAN",
      tagClass = DerHeader.TAG_CLASS_UNIVERSAL,
      tag = 1L,
      codec =
        object : BasicDerAdapter.Codec<Boolean> {
          override fun decode(reader: DerReader): Boolean = reader.readBoolean()

          override fun encode(
            writer: DerWriter,
            value: Boolean,

import okhttp3.internal.connection.RealCall
import okio.Sink
import okio.Source

/** Encodes HTTP requests and decodes HTTP responses. */
interface ExchangeCodec {
  /** The connection or CONNECT tunnel that owns this codec. */
  val carrier: Carrier

  /** Returns an output stream where the request body can be streamed. */
  @Throws(IOException::class)
  fun createRequestBody(
    request: Request,
    contentLength: Long,
  ): Sink

pkg p1, method (TPtrUnexported) OnBothTandBVal()
pkg p1, type B struct
pkg p1, type ByteStruct struct
pkg p1, type ByteStruct struct, B uint8
pkg p1, type ByteStruct struct, R int32
pkg p1, type Codec struct
pkg p1, type Codec struct, Func func(int, int) int
pkg p1, type EmbedSelector struct
pkg p1, type EmbedSelector struct, embedded Time
pkg p1, type EmbedURLPtr struct
pkg p1, type EmbedURLPtr struct, embedded *URL

    "@jridgewell/trace-mapping" "^0.3.9"

"@jridgewell/sourcemap-codec@1.4.14":
  version "1.4.14"
  resolved "https://registry.yarnpkg.com/@jridgewell/sourcemap-codec/-/sourcemap-codec-1.4.14.tgz#add4c98d341472a289190b424efbdb096991bb24"
  integrity sha512-XPSJHWmi394fuUuzDnGz1wiKqWfo1yXecHQMRf2l6hztTO+nPru658AyDngaBe7isIxEkRsPR3FZh+s7iVa4Uw==

"@jridgewell/sourcemap-codec@^1.4.10":
  version "1.4.13"

例如，假设你想有一个 *路径操作* 能够更新条目，并且更新成功时返回 200 「成功」 的 HTTP 状态码。

但是你也希望它能够接受新的条目。并且当这些条目不存在时，会自动创建并返回 201 「创建」的 HTTP 状态码。

要实现它，导入 `JSONResponse`，然后在其中直接返回你的内容，并将 `status_code` 设置为为你要的值。

```Python hl_lines="4  25"
{!../../../docs_src/additional_status_codes/tutorial001.py!}
```

!!! warning "警告"
    当你直接返回一个像上面例子中的 `Response` 对象时，它会直接返回。

    FastAPI 不会用模型等对该响应进行序列化。