POST请求头中

Accept-Encoding : gzip, deflate, br

响应

Content-Encoding : br

如果python当前运行环境没有安装 brotli 或 brotlicffi 库，将导致不能正确解压响应数据，导致乱码。

安装任意一个之后立刻解决，见下图

httpx源码中

try:
    import brotlicffi as brotli
except ImportError:  # pragma: no cover
    try:
        import brotli
    except ImportError:
        brotli = None

httpx文档的说明

The HTTPX project relies on these excellent libraries:

• httpcore - The underlying transport implementation for httpx.
• h11 - HTTP/1.1 support.
• certifi - SSL certificates.
• idna - Internationalized domain name support.
• sniffio - Async library autodetection.

As well as these optional installs:

• h2 - HTTP/2 support. (Optional, with httpx[http2])
• socksio - SOCKS proxy support. (Optional, with httpx[socks])
• rich - Rich terminal support. (Optional, with httpx[cli])
• click - Command line client support. (Optional, with httpx[cli])
• brotli or brotlicffi - Decoding for "brotli" compressed responses. (Optional, with httpx[brotli])

brotli 或 brotlicffi 是一个可选项，并不是依赖，默认不会安装。