{* ../../docs_src/first_steps/tutorial001_py310.py hl[6] *}

`@app.get("/")` сообщает **FastAPI**, что функция прямо под ним отвечает за обработку запросов, поступающих:

* по пути `/`
* с использованием <dfn title="метод HTTP GET"><code>get</code> операции</dfn>

/// info | Информация о `@decorator`

Синтаксис `@something` в Python называется «декоратор».

        },
        {"url": "https://prod.example.com"},
    ]
)


@app.get("/foo")
def foo():
    return {"message": "Hello World"}


client = TestClient(app)


def test_app():
    response = client.get("/foo")
    assert response.status_code == 200, response.text


def test_openapi_schema():
    response = client.get("/openapi.json")
    assert response.status_code == 200, response.text

	if err != nil {
		writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
		return
	}

	if r.Header.Get(xhttp.IfMatch) != "" {
		opts.HasIfMatch = true
	}
	if opts.PreserveETag != "" ||
		r.Header.Get(xhttp.IfMatch) != "" ||
		r.Header.Get(xhttp.IfNoneMatch) != "" {
		opts.CheckPrecondFn = func(oi ObjectInfo) bool {
			if _, err := DecryptObjectInfo(&oi, r); err != nil {

        this.acceptedApiChanges = acceptedApiChanges ? AcceptedApiChanges.fromAcceptedChangesMap(acceptedApiChanges.get()) : [:]

        // Tests will not supply these
        this.mainApiChangesJsonFile = params.get("mainApiChangesJsonFile") ? new File(params.get("mainApiChangesJsonFile") as String) : null

    }

    @Override
    public V get() throws InterruptedException {
      /*
       * Wait a little to give us time to call addListener before the future's
       * value is set in addition to the call we'll make after then.
       */
      allowGetToComplete.await(1, SECONDS);
      throw new RuntimeException("expected, should be caught");
    }

    @Override
    public V get(long timeout, TimeUnit unit) {

            result.setCreatedBy(DfTypeUtil.toString(source.get("createdBy")));
            result.setCreatedTime(DfTypeUtil.toLong(source.get("createdTime")));
            result.setName(DfTypeUtil.toString(source.get("name")));
            result.setSortOrder(DfTypeUtil.toInteger(source.get("sortOrder")));
            result.setUpdatedBy(DfTypeUtil.toString(source.get("updatedBy")));

    assertThat(atomicTags.get()[String::class]).isEqualTo("a")
  }

  @Test
  fun computeIfAbsentWhenPresent() {
    val tags = EmptyTags.plus(String::class, "a")
    val atomicTags = AtomicReference(tags)
    assertThat(atomicTags.computeIfAbsent(String::class) { "b" }).isEqualTo("a")
    assertThat(atomicTags.get()[String::class]).isEqualTo("a")
  }

  @Test

}

val libs = extensions.getByType<VersionCatalogsExtension>().named("libs")

fun library(alias: String) = libs.findLibrary(alias).get().get().let {
  "${it.module.group}:${it.module.name}:${it.versionConstraint.requiredVersion}"
}
fun version(alias: String) = libs.findVersion(alias).get().toString()

extensions.configure<JavaPluginExtension> {
  toolchain {
    languageVersion.set(JavaLanguageVersion.of(21))
  }
}

    public void grantReceiveCredit() {
        receiveCredits.incrementAndGet();
    }

    /**
     * Get number of available send credits
     *
     * @return available send credits
     */
    public int getAvailableSendCredits() {
        return sendCredits.get();
    }

    /**
     * Get number of available receive credits
     *
     * @return available receive credits
     */

        assertNotNull(responseHeaders.get("Access-Control-Allow-Origin"), "Allow-Origin header should be set");
        assertNotNull(responseHeaders.get("Access-Control-Allow-Methods"), "Allow-Methods header should be set");
        assertNotNull(responseHeaders.get("Access-Control-Allow-Headers"), "Allow-Headers header should be set");
        assertNotNull(responseHeaders.get("Access-Control-Max-Age"), "Max-Age header should be set");