寫了一小段代碼，用 Flask 獲取 POST 的 JSON data。

import json
from flask import Flask, request, redirect, jsonify
app = Flask(__name__)


@app.route('/test/', methods=['GET','POST'])
def test():
    print(request.method)
    if request.method == "POST":
        data = request.get_data()
        json_data = json.loads(data)
        return json.dumps(json_data)
    else:
        return request.method

if __name__ == '__main__':
    app.run(debug=True)

但是一來就給我報(bào)錯(cuò)
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)

因?yàn)?Postman 里面得這么設(shè)置：

PostMan

用 curl 也行
curl -H "Content-Type: application/json" -X POST -d '{'username':"abc",'password':"abc"}' http://localhost:5000