Его можно возвращать напрямую.

Он принимает следующие параметры:

- `content` — `str` или `bytes`.
- `status_code` — целое число, HTTP статус-код.
- `headers` — словарь строк.
- `media_type` — строка, задающая тип содержимого. Например, `"text/html"`.

FastAPI (фактически Starlette) автоматически добавит заголовок Content-Length. Также будет добавлен заголовок Content-Type, основанный на `media_type` и с добавлением charset для текстовых типов.

def test_router_a_a_override():
    with client:
        response = client.get("/a/a/override")
    assert response.content == b"Hello A A"
    assert response.headers["content-type"] == text_type


def test_router_a_b():
    with client:
        response = client.get("/a/b")
    assert response.content == b"Hello A B"
    assert response.headers["content-type"] == text_type

      message = "Moved to extension function. Put the 'content' argument first to fix Java",
      replaceWith =
        ReplaceWith(
          expression = "content.toRequestBody(contentType)",
          imports = ["okhttp3.RequestBody.Companion.toRequestBody"],
        ),
      level = DeprecationLevel.WARNING,
    )
    fun create(
      contentType: MediaType?,
      content: String,

    }

    /**
     * Gets the extracted content.
     *
     * @return the extracted content
     */
    public String getContent() {
        return content;
    }

    /**
     * Sets the extracted content.
     *
     * @param content the content to set
     */
    public void setContent(final String content) {
        this.content = content;
    }

    /**

        // Write length
        if (content.length < 128) {
            baos.write(content.length);
        } else if (content.length < 256) {
            baos.write(0x81); // length of length = 1
            baos.write(content.length);
        } else {
            baos.write(0x82); // length of length = 2
            baos.write((content.length >> 8) & 0xFF);
            baos.write(content.length & 0xFF);
        }

        processingTime = 0;
    }

    /**
     * Gets the total content size of all documents in this list.
     *
     * @return the total content size in bytes
     */
    public long getContentSize() {
        return contentSize;
    }

    /**
     * Adds to the total content size of this document list.
     *
     * @param contentSize the content size to add in bytes
     */

const e = 1.0 << 3         // e == 8     (untyped integer constant)
const f = int32(1) << 33   // illegal    (constant 8589934592 overflows int32)
const g = float64(2) >> 1  // illegal    (float64(2) is a typed floating-point constant)
const h = "foo" > "bar"    // h == true  (untyped boolean constant)
const j = true             // j == true  (untyped boolean constant)

     */
    public String getSimpleName() {
        return new File(path).getName();
    }

    /**
     * Updates the dictionary file with content from an input stream.
     *
     * @param in The input stream containing the new dictionary content.
     * @throws IOException if an I/O error occurs.
     */
    public synchronized void update(final InputStream in) throws IOException {

                        "200": {
                            "description": "Successful Response",
                            "content": {"application/json": {"schema": {}}},
                        },
                        "422": {
                            "description": "Validation Error",
                            "content": {
                                "application/json": {
                                    "schema": {

     */
    @Override
    public void debug(CharSequence content) {
        print("debug", content);
    }

    /**
     * @see org.apache.maven.plugin.logging.Log#debug(java.lang.CharSequence, java.lang.Throwable)
     */
    @Override
    public void debug(CharSequence content, Throwable error) {
        print("debug", content, error);
    }

    /**