I have build a flask app in docker from nvidia/cuda:12.5.1-cudnn-runtime-ubuntu22.04. But this flask cannot receive any utf-8 request with the Bad request syntax error.

# here the messy code ä½xa0好 is 你好 in Chinese, which means hello
code 400, message Bad request syntax ('GET /chat?question=ä½xa0好 HTTP/1.1')

For English characters that the query question=hello, everything works fine. I tried to set app.json.ensure_ascii = False and set the charset=UTF-8 in curl, but got the same error.

However, when I launch the app with gunicorn, it works. By the way, I set the locales of the docker image to Chinese, so probably it’s not the system problem.

This is the demo code:

from flask import Flask, request

app = Flask(__name__)
app.json.ensure_ascii = False
@app.route("/chat", methods=["GET"])
def chat():
    query = request.args.get("question")
    print(query)
    return query

@app.route("/")
def test():
    return "你好"

if __name__ == "__main__":
    app.run(host="0.0.0.0", port=10132, debug=True)