How to decode the UploadFile when read in async way?

[superxuu]

First check

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Example

from fastapi import FastAPI,  UploadFile

@app.post("/uploadfile/")
async def create_upload_file(
file: UploadFile = File(...)
):

    contents = await file.read()
    return {"contents": contents}

Description

my UploadFile is coded in GBK， bug Fastapi's default is utf8， so when I read the UploadFile ,I got the error: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xd0 in position 0: invalid continuation byte

how can I decode the UploadFile in my own way?

Environment

• OS: Windows
• FastAPI Version : 0.45.0

To know the FastAPI version use:

python -c "import fastapi; print(fastapi.__version__)"

• Python version:Python 3.6.3

To know the Python version use:

python --version

Additional context

[sedhha]

Was it resolved by any chance?

[liqiujiong]

i happen same problem in fastapi-0.75.2 that i upload .wav file ，

# file 参数类型是 UploadFile
@app.post("/uploadfile/")
async def create_upload_file(file: UploadFile = File(...)):
    result = {
        "filename": file.filename,
        "content-type": file.content_type,
        "read": await file.read()
    }
    return result

[nanarino]

我在 fastapi0.86.0 中用GB2312的文本文件或者二进制文件测试：

content = await file.read()
print(type(content))  # <class 'bytes'>

结果都是bytes， 没有遇到str的情况。我直接用wb+写入后可以正常使用 但是当我开启 vscode 的 type checking on后 会遇到警告：Type "bytes | str" cannot be assigned to type "bytes", "str" is incompatible with "bytes" 🤔