192.Flask和Ajax技术 · Flask notebook

``` <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title>   <script src="https://cdn.bootcss.com/jquery/3.3.1/jquery.min.js"></script> <script> $(function () { $('#submit-btn').click(function (event) { event.preventDefault(); {#$.ajax()#} {#$.get();#} {#$.post();#} var username = $('input[name="username"]').val(); var password = $('input[name="password"]').val(); $.post({ 'url':'/login/', 'data':{ 'username':username, 'password':password, }, 'success':function (data) { if(data["code"] == 200){ window.location = '/'; }else{ {#window.alert(data["message"]);#} var message = data["message"]; $("#message-p").html(message); $("#message-p").show(); } }, 'fail':function (error) { console.log(error); } }); }); }); </script> </head> <body> <form action="" method="post"> <table> <tr> <td>用户名:</td> <td><input type="text" name="username"></td> </tr> <tr> <td>密码:</td> <td><input type="password" name="password"></td> </tr> <tr> <td></td> <td> <button id="submit-btn">立即登陆</button> </td> </tr> </table> <p style="display: none;color: red;" id="message-p"></p> </form> </body> </html> ``` ``` from flask import Flask,render_template,request,url_for,redirect,jsonify app = Flask(__name__) # Ajax（ajax） # Async JavaScript And XML # Async（异步），网络请求是异步的 # JavaScript:JavaScriptt语言 # And:并且 # XML -> Json @app.route('/') def index(): return 'Hello World!' # 传统表单 @app.route('/login/',methods=["POST","GET"]) def login(): if request.method == "GET": return render_template('login.html') else: # 和前端约定好，发送网络请求，不管是否验证成功 # 都返回同样格式的json对象 # {"code":code,"message":message} username = request.form.get("username") password = request.form.get("password") # return "username:{},password:{}".format(username,password) if username == "angle" and password == "123456": return jsonify({"code":200,"message":""}) else: return jsonify({"code":401,"message":"用户名或密码错误"}) if __name__ == '__main__': app.run(debug=True) ```