from starlette.middleware.gzip import GZipMiddleware as GZipMiddleware  # noqa...

* 把 <a href="https://msgpack.org/index.html" class="external-link" target="_blank">`msgpack`</a> 等非 JSON 请求体转换为 JSON
* 解压 gzip 压缩的请求体
* 自动记录所有请求体的日志

## 处理自定义请求体编码

下面学习如何使用自定义 `Request` 子类压缩 gizp 请求。

并在自定义请求的类中使用 `APIRoute` 子类。

### 创建自定义 `GzipRequest` 类

!!! tip "提示"

    本例只是为了说明 `GzipRequest` 类如何运作。如需 Gzip 支持，请使用 [`GzipMiddleware`](./middleware.md#gzipmiddleware){.internal-link target=_blank}。

## `GZipMiddleware`

Handles GZip responses for any request that includes `"gzip"` in the `Accept-Encoding` header.

The middleware will handle both standard and streaming responses.

```Python hl_lines="2  6"
{!../../../docs_src/advanced_middleware/tutorial003.py!}
```

The following arguments are supported:

* Decompressing gzip-compressed request bodies.
* Automatically logging all request bodies.

## Handling custom request body encodings

Let's see how to make use of a custom `Request` subclass to decompress gzip requests.

And an `APIRoute` subclass to use that custom request class.

### Create a custom `GzipRequest` class

client = TestClient(app)


def test_middleware():
    response = client.get("/large", headers={"accept-encoding": "gzip"})
    assert response.status_code == 200, response.text
    assert response.text == "x" * 4000
    assert response.headers["Content-Encoding"] == "gzip"
    assert int(response.headers["Content-Length"]) < 4000
    response = client.get("/")

import gzip
import json

import pytest
from fastapi import Request
from fastapi.testclient import TestClient

from docs_src.custom_request_and_route.tutorial001 import app


@app.get("/check-class")
async def check_gzip_request(request: Request):
    return {"request_class": type(request).__name__}


client = TestClient(app)


@pytest.mark.parametrize("compress", [True, False])
def test_gzip_request(compress):

import gzip
from typing import Callable, List

from fastapi import Body, FastAPI, Request, Response
from fastapi.routing import APIRoute


class GzipRequest(Request):
    async def body(self) -> bytes:
        if not hasattr(self, "_body"):
            body = await super().body()
            if "gzip" in self.headers.getlist("Content-Encoding"):
                body = gzip.decompress(body)
            self._body = body
        return self._body

* Dekomprimierung gzip-komprimierter Requestbodys.
* Automatisches Loggen aller Requestbodys.

## Handhaben von benutzerdefinierten Requestbody-Kodierungen

Sehen wir uns an, wie Sie eine benutzerdefinierte `Request`-Unterklasse verwenden, um gzip-Requests zu dekomprimieren.

It can be imported from `fastapi`:

```python
from fastapi.middleware.cors import CORSMiddleware
```

::: fastapi.middleware.gzip.GZipMiddleware

It can be imported from `fastapi`:

```python
from fastapi.middleware.gzip import GZipMiddleware
```

::: fastapi.middleware.httpsredirect.HTTPSRedirectMiddleware

It can be imported from `fastapi`:

```python

Kann von `fastapi` importiert werden:

```python
from fastapi.middleware.cors import CORSMiddleware
```

::: fastapi.middleware.gzip.GZipMiddleware

Kann von `fastapi` importiert werden:

```python
from fastapi.middleware.gzip import GZipMiddleware
```

::: fastapi.middleware.httpsredirect.HTTPSRedirectMiddleware

Kann von `fastapi` importiert werden:

```python