Disons que vous voulez renvoyer du JSON indenté et formaté, donc vous voulez utiliser l'option orjson `orjson.OPT_INDENT_2`.

Vous pourriez créer une `CustomORJSONResponse`. L'essentiel est de créer une méthode `Response.render(content)` qui renvoie le contenu en `bytes` :

{* ../../docs_src/custom_response/tutorial009c_py310.py hl[9:14,17] *}

Maintenant, au lieu de renvoyer :

```json
{"message": "Hello World"}
```

* `headers` - Un `dict` de strings.
* `media_type` - Un `str` que da el media type. Por ejemplo, `"text/html"`.

FastAPI (de hecho Starlette) incluirá automáticamente un header Content-Length. También incluirá un header Content-Type, basado en el `media_type` y añadiendo un conjunto de caracteres para tipos de texto.

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

	defer zipWriter.Close()
	rawDataFn := func(r io.Reader, filename string, sz int) error {
		header, zerr := zip.FileInfoHeader(dummyFileInfo{
			name:    filename,
			size:    int64(sz),
			mode:    0o600,
			modTime: time.Now(),
			isDir:   false,
			sys:     nil,
		})
		if zerr != nil {
			adminLogIf(ctx, zerr)
			return nil
		}
		header.Method = zip.Deflate

你可以建立自己的自訂回應類別，繼承自 `Response` 並加以使用。

例如，假設你要使用 [`orjson`](https://github.com/ijl/orjson) 並套用一些設定。

假設你想回傳縮排且格式化的 JSON，因此要使用 orjson 選項 `orjson.OPT_INDENT_2`。

你可以建立 `CustomORJSONResponse`。你主要需要做的是建立一個 `Response.render(content)` 方法，將內容以 `bytes` 回傳：

{* ../../docs_src/custom_response/tutorial009c_py310.py hl[9:14,17] *}

現在，不再是回傳：

```json
{"message": "Hello World"}
```

...這個回應會回傳：

```json
{

/*
 * Copyright 2012-2025 CodeLibs Project and the Others.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,

    """
    Add or update header permalinks in specific pages of En docs.
    """
    for md_file in pages:
        add_permalinks_page(md_file, update_existing=update_existing)


@app.command()
def add_permalinks(update_existing: bool = False) -> None:
    """
    Add or update header permalinks in all pages of En docs.
    """

rhcloud.com

// Redgate Software: https://red-gate.com
// Submitted by Andrew Farries <******@****.***>
instances.spawn.cc

// Render : https://render.com
// Submitted by Anurag Goel <dev@render.com>
onrender.com
app.render.com

// Repl.it : https://repl.it
// Submitted by Lincoln Bergeson <******@****.***>
replit.app
id.replit.app
firewalledreplit.co

	csv "github.com/minio/csvparser"
	"github.com/minio/minio/internal/bpool"
	"github.com/minio/minio/internal/s3select/sql"
)

// Reader - CSV record reader for S3Select.
type Reader struct {
	args         *ReaderArgs
	readCloser   io.ReadCloser          // raw input
	buf          *bufio.Reader          // input to the splitter
	columnNames  []string               // names of columns

	"strconv"
	"strings"
	"time"
)

// Reader provides sequential access to the contents of a tar archive.
// Reader.Next advances to the next file in the archive (including the first),
// and then Reader can be treated as an io.Reader to access the file's data.
type Reader struct {
	r    io.Reader
	pad  int64      // Amount of padding (ignored) after current file entry
	curr fileReader // Reader for current file entry

import (
	"errors"
	"io"
	"unicode/utf8"
)

// A Reader implements the [io.Reader], [io.ReaderAt], [io.WriterTo], [io.Seeker],
// [io.ByteScanner], and [io.RuneScanner] interfaces by reading from
// a byte slice.
// Unlike a [Buffer], a Reader is read-only and supports seeking.
// The zero value for Reader operates like a Reader of an empty slice.
type Reader struct {
	s        []byte
	i        int64 // current reading index