Python 的 inspect.Signature 对象有个 bind 方法，它可以把任意个参数绑定到签名中的形参上, 可以使用这个方法在真正调用函数前验证参数是否传递
from flask import Flask, jsonify, request
import inspect
app = Flask(__name__)
# **kwargs 忽略多余的参数
def auth_param_func(username, password, **kwargs): pass
def valid_auth_empty(func, form):
sig = inspect.signature(func)
try:
sig.bind(**form)
except TypeError as e:
return 'form data is not full'
else:
return None
@app.route('/login', methods=['GET', 'POST'])
def login():
form = request.get_json() or {}
err = valid_auth_empty(auth_param_func, form)
if err is not None:
res = jsonify({'detail': err})
res.status_code = 400
else:
res = jsonify({'success': 'ok'})
return res
if __name__ == '__main__':
app.run(host='0.0.0.0',
port=5000,
debug=True)
- 参数缺失时，400错误
curl -H "Content-Type: application/json" -d '{"username":"u14e"}' http://192.168.1.195:5000/login
{
"detail": "form data is not full"
}
- 检查通过
curl -H "Content-Type: application/json" -d '{"username":"u14e","password":"123456"}' http://192.168.1.195:5000/login
{
"success": "ok"
}
- 自动忽略多余的参数(
"code": 675489)
curl -H "Content-Type: application/json" -d '{"username":"u14e","password":"123456","code":675489}' http://192.168.1.195:5000/login
{
"success": "ok"
}
