import static com.google.common.base.StandardSystemProperty.OS_NAME;
import static com.google.common.base.StandardSystemProperty.PATH_SEPARATOR;
import static com.google.common.truth.Truth.assertThat;
import static java.nio.charset.StandardCharsets.US_ASCII;

import com.google.common.base.Joiner;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableSet;
import com.google.common.io.Closer;

#### Define a *path operation decorator* { #define-a-path-operation-decorator }

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

The `@app.get("/")` tells **FastAPI** that the function right below is in charge of handling requests that go to:

* the path `/`
* using a <dfn title="an HTTP GET method"><code>get</code> operation</dfn>

/// info | `@decorator` Info

# Utiliser des dépendances avec `yield` { #dependencies-with-yield }

FastAPI prend en charge des dépendances qui effectuent des <dfn title='parfois aussi appelées « exit code », « cleanup code », « teardown code », « closing code », « context manager exit code », etc.'>étapes supplémentaires après l'exécution</dfn>.

Pour cela, utilisez `yield` au lieu de `return`, et écrivez les étapes supplémentaires (code) après.

/// tip | Astuce

- `status_code` - `int` 類型的 HTTP 狀態碼。
- `headers` - 由字串組成的 `dict`。
- `media_type` - 描述 media type 的 `str`。例如 `"text/html"`。

FastAPI（實際上是 Starlette）會自動包含 Content-Length 標頭。也會根據 `media_type`（並為文字型別附加 charset）包含 Content-Type 標頭。

{* ../../docs_src/response_directly/tutorial002_py310.py hl[1,18] *}

### `HTMLResponse` { #htmlresponse }

接收文字或位元組並回傳 HTML 回應，如上所述。

### `PlainTextResponse` { #plaintextresponse }

				"application/vnd.nokia.radio-presets",
				"application/vnd.novadigm.edm",
				"application/vnd.novadigm.edx",
				"application/vnd.novadigm.ext",
				"application/vnd.oasis.opendocument.chart",
				"application/vnd.oasis.opendocument.chart-template",
				"application/vnd.oasis.opendocument.database",
				"application/vnd.oasis.opendocument.formula",
				"application/vnd.oasis.opendocument.formula-template",

* Fixes an issue where Portworx PVCs remain in pending state when created using a StorageClass with empty parameters ([#64895](https://github.com/kubernetes/kubernetes/pull/64895), [@harsh-px](https://github.com/harsh-px))
* add external resource group support for azure disk ([#64427](https://github.com/kubernetes/kubernetes/pull/64427), [@andyzhangx](https://github.com/andyzhangx))

        final StringWriter stringWriter = new StringWriter();
        final PrintWriter writer = new PrintWriter(stringWriter);

        chatApiManager.sendSseEvent(writer, "chunk", Map.of("content", "Special chars: \"quotes\" and \\ backslash"));

        final String output = stringWriter.toString();
        assertTrue(output.contains("event: chunk"));
        // JSON should properly escape special characters

        private final String output;

        public TestInputStreamThread(String output) {
            super(new java.io.ByteArrayInputStream(new byte[0]), java.nio.charset.StandardCharsets.UTF_8, 1000, null);
            this.output = output;
        }

        @Override
        public void start() {
            // Override start to do nothing in test - simulate immediate completion

            @Override
            public java.io.PrintWriter getWriter() throws IOException {
                return null;
            }

            @Override
            public void setCharacterEncoding(String charset) {
            }

            @Override
            public void setContentLength(int len) {
            }

            @Override
            public void setContentLengthLong(long len) {
            }

        }

        @Override
        public jakarta.servlet.ServletOutputStream getOutputStream() {
            return null;
        }

        @Override
        public void setCharacterEncoding(String charset) {
        }

        @Override
        public void setContentLength(int len) {
        }

        @Override
        public void setContentLengthLong(long len) {
        }

        @Override