How to prevent json response from encoding escape sequence?

Questions and Help
#1

How to make response decode dict in UTF-8?

from sanic import Sanic
from sanic.response import json as s_json
import json

app = Sanic("App Name")

d = {"aa": "тестовое наименование"}

@app.route("/")
async def test(request):
    return s_json(d)

if __name__ == "__main__":
    app.run(host="127.0.0.2", port=8000)

In web browser I am getting:

{"aa":"\u0442\u0435\u0441\u0442\u043e\u0432\u043e\u0435 \u043d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435"}

I googled, but I did not found any answer.

#2

Hi @bubnenkoff

Thanks for your question. This is an easy one.

The Sanic response.json() helper takes any **kwargs you give it and passes it onto the ujons.dumps() function. ujson (and python’s built-in JSON library) has an option called ensure_ascii that ascii-encodes the output by default, that is what you’re seeing here.
Luckily it is easy to disable that option by passing ensure_ascii=False to dumps(), which means you can pass that option to response.json() too, and it will be pass onto ujson. Eg:

@app.route("/")
async def test(request):
    return s_json(d, ensure_ascii=False)
#3

For that matter, it is also worth noting that you can pass your own dumps function for serializing. There are many in the python ecosystem.

from orjson import dumps

@app.route("/")
async def test(request):
    return s_json(d, dumps=dumps)