for _, conf := range testConfigs {
			failOnErr := func(err error) {
				if err != nil {
					logger.Fatal(errSelfTestFailure, "%v: error on self-test [d:%d,p:%d]: %v. Unsafe to start server.\n", algo, conf[0], conf[1], err)
				}
			}
			e, err := NewErasure(context.Background(), int(conf[0]), int(conf[1]), blockSizeV2)
			failOnErr(err)
			encoded, err := e.EncodeData(GlobalContext, testData[:])

            <option value="$PROJECT_DIR$/platforms/core-execution/build-cache-spi" />
            <option value="$PROJECT_DIR$/platforms/core-execution/daemon-server-worker" />
            <option value="$PROJECT_DIR$/platforms/core-execution/execution" />
            <option value="$PROJECT_DIR$/platforms/core-execution/execution-e2e-tests" />

The `password` "flow" is one of the ways ("flows") defined in OAuth2, to handle security and authentication.

OAuth2 was designed so that the backend or API could be independent of the server that authenticates the user.

But in this case, the same **FastAPI** application will handle the API and the authentication.

So, let's review it from that simplified point of view:

 * [DNS over HTTPS implementation][doh_spec].
 *
 * > A DNS API client encodes a single DNS query into an HTTP request
 * > using either the HTTP GET or POST method and the other requirements
 * > of this section.  The DNS API server defines the URI used by the
 * > request through the use of a URI Template.
 *
 * [doh_spec]: https://tools.ietf.org/html/draft-ietf-doh-dns-over-https-13
 */
class DnsOverHttps internal constructor(

   */
  open fun requestFailed(
    call: Call,
    ioe: IOException,
  ) {
  }

  /**
   * Invoked when response headers are first returned from the server.
   *
   * The connection is implicit, and will generally relate to the last [connectionAcquired] event.
   *
   * This can be invoked more than 1 time for a single [Call]. For example, if the response to the

{* ../../docs_src/dependencies/tutorial008c_an_py310.py hl[15:16] *}

この場合、（`HTTPException`やそれに類するものをraiseしていないため）クライアントには適切に*HTTP 500 Internal Server Error*レスポンスが返りますが、サーバーには**ログが一切残らず**、何がエラーだったのかを示す他の手がかりもありません。 😱

### `yield`と`except`を持つ依存関係では常に`raise`する { #always-raise-in-dependencies-with-yield-and-except }

そして、[`CORSMiddleware` を使った CORS の扱い方](../tutorial/cors.md)も学びました。

このセクションでは、その他のミドルウェアの使い方を見ていきます。

## ASGI ミドルウェアの追加 { #adding-asgi-middlewares }

**FastAPI** は Starlette を基盤としており、<abbr title="Asynchronous Server Gateway Interface - 非同期サーバーゲートウェイインターフェース">ASGI</abbr> 仕様を実装しているため、任意の ASGI ミドルウェアを利用できます。

ミドルウェアは ASGI 仕様に従っていれば、FastAPI や Starlette 専用に作られていなくても動作します。

一般に、ASGI ミドルウェアは最初の引数として ASGI アプリを受け取るクラスです。

                else:
                    data = jsonable_encoder(data)
                    return json.dumps(data).encode("utf-8")

            if is_sse_stream:
                # Generator endpoint: stream as Server-Sent Events
                gen = dependant.call(**solved_result.values)

                def _serialize_sse_item(item: Any) -> bytes:
                    if isinstance(item, ServerSentEvent):

	KeyMarker string

	// When response is truncated (the IsTruncated element value in the response
	// is true), you can use the key name in this field as marker in the subsequent
	// request to get next set of objects. Server lists objects in alphabetical
	// order Note: This element is returned only if you have delimiter request parameter
	// specified. If response does not include the NextMaker and it is truncated,

For example, if a Go program is running in an environment that contains

	GODEBUG=http2client=0,http2server=0

then that Go program will disable the use of HTTP/2 by default in both
the HTTP client and the HTTP server.
Unrecognized settings in the `GODEBUG` environment variable are ignored.
It is also possible to set the default `GODEBUG` for a given program
(discussed below).