JWT-Flask

pip install pyjwt

```python
import jwt
import datetime

#略

@index_index.route('/jwt_login')
def jwt_login():
    app = current_app._get_current_object() #导入app对象
    payload = {
        "userid": 888,
        # 过期时间要用0时区的。
        "exp": datetime.datetime.utcnow() + datetime.timedelta(days=1)
    }

# 加密并获取token
    token = jwt.encode(payload, key=app.config['SECRET_KEY'], algorithm="HS256")
    print(token)
	#测试验证
    #data=jwt.decode(token, app.config['SECRET_KEY'], algorithms=["HS256"])
    #print(data)
    return "token: %s" % token
	
	
	@index_index.route('/jwt_check')
def jwt_check():
    print('开始校验token')
    app = current_app._get_current_object()
    print(request.headers.get("Authorization"))

try:
        jwt_decode = jwt.decode(request.headers.get("Authorization"), key=app.config['SECRET_KEY'], algorithms=["HS256"])
        print(jwt_decode)
        return jwt_decode
    except Exception as e:
        print(e)
        return "token校验出错"

```

###官方DEMO
```python
pip install pyjwt

>>> import jwt
>>> encoded_jwt = jwt.encode({"some": "payload"}, "secret", algorithm="HS256")
>>> print(encoded_jwt)
eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzb21lIjoicGF5bG9hZCJ9.4twFt5NiznN84AWoo1d7KO1T_yoc0Z6XOpOVswacPZg
>>> jwt.decode(encoded_jwt, "secret", algorithms=["HS256"])
{'some': 'payload'}
```