flask基本使用

from flask import Flask, jsonify, request, make_response, redirect
import datetime
app = Flask(__name__)
app.config["JSON_AS_ASCII"] = False  # jsonify返回的中文正常显示
# 第一步
@app.route("/")
def test1():
    return "你好flask"
# 返回json数据
@app.route('/json')
def do_json():
    hello = {"name": "stranger", "say": "hello"}
    return jsonify(hello)
# 状态码设置
@app.route('/status_500')
def status_500():
    return "hello", 500
# cookie
@app.route('/set_cookie')
def set_cookie():
    response = make_response('这个页面携带cookie')
    out_date = datetime.datetime.today() + datetime.timedelta(days=30)  # cookie的有效时长30天
    response.set_cookie('username', 'li1236', expires=out_date)
    return response
# 重定向
@app.route('/redir')
def redir():
    return redirect('https://www.baidu.com')
# 设置请求方法
@app.route("/users", methods=["GET"])
def get_all_users():
    """获取所有用户信息"""
    return jsonify({"code": "200", "data": {"id": 3, "username": "大白", "password": "666666"}, "msg": "操作成功"})
# 控制用户输入数据格式
# 普通的values值传输
@app.route("/values", methods=['POST'])
def values():
    values1 = request.values.get('values1')
    values2 = request.values.get('values2')
    if values1 and values2:
        return jsonify({"code": 200, "msg": "values传参方式访问成功"})
    else:
        return jsonify({"code": 2001, "msg": "values1/values2不能为空，请检查"})
# form值传输
@app.route("/form", methods=['POST'])
def form():
    form1 = request.form.get('form1')
    form2 = request.form.get('form2')
    if form1 and form2:
        return jsonify({"code": 200, "msg": "from传参方式访问成功"})
    else:
        return jsonify({"code": 2001, "msg": "form1/form2不能为空，请检查"})
# 传参方式必须是application/json
@app.route("/register", methods=['POST'])
def userRegister():
    username = request.json.get("username").strip()  # 用户名
    password = request.json.get("password").strip()  # 密码
    if username and password:
        if username == "李帅哥":
            return jsonify({"code": 2002, "msg": "用户名已存在"})
        elif len(password) < 6:
            return jsonify({"code": 2002, "msg": "密码长度必须大于或者等于6位"})
        else:
            return jsonify({"code": 200, "msg": "恭喜，注册成功！"})
    else:
        return jsonify({"code": 2001, "msg": "用户名/密码不能为空，请检查"})
# 控制用户的请求方法
# delete方法
# delete和get的传参直接写在方法名后面
@app.route("/delete/<int:userId>", methods=['DELETE'])
def delete(userId):
    if userId > 0 and userId < 10:
        return jsonify({"code": 200, "msg": "删除" + str(userId) + "成功"})
    else:
        return jsonify({"code": 200, "msg": "该用户不存在"}), 200
# put方法方法
@app.route("/put", methods=['PUT'])
def put():
    put1 = request.values.get('put1')
    put2 = request.values.get('put2')
    if put1 and put2:
        return jsonify({"code": 200, "msg": "put请求方式访问成功，信息修改成功"})
    else:
        return jsonify({"code": 2001, "msg": "put1/put2不能为空，请检查"})
#登录生成cookie
@app.route('/login', methods=["POST"])
def login():
    name = request.json.get('name')
    pwd = request.json.get('pwd')
    if name and pwd:
        if name == "li" and pwd == "123":
            response = make_response(jsonify({"msg": "恭喜，注册成功"}))
            out_date = datetime.datetime.today() + datetime.timedelta(days=30)  # cookie的有效时长30天
            response.set_cookie('username', 'li1236', expires=out_date)
            return response, 200
    else:
        return '登陆失败'
if __name__ == '__main__':
    app.run(debug=True)