第一次做#后端#，好像前端反馈数据后台无法处理

为什么我发写的这个发送邮件网站无法进行发送，具体是接收到了数据但后端没有处理结果，也没有预期的成功或者报错
两组代码如下

index.html

<!doctype html>
<html>
<head>
    <meta charset="utf-8">
    <title>信息登记表</title>
    <!-- <link rel="stylesheet" href="style07.css" type="text/css"> -->
    <style type="text/css">
        input {
            width: 200px;
            height: 18px;
            border: 1px solid #d4cdba;
            padding: 2px;
        }

        .btn input {
            width: 100px;
            height: 30px;
            border-radius: 3px;
        }
    </style>
</head>
<body>
<div class="bg">
    <form action="#" method="get" autocomplete="off">
        <h2>邮件发送</h2>
        <p><span>发送者邮箱：</span>
            <!-- 在下面的横线中填写`必填属性`和`自动聚焦` -->
            <input type="text" name="sender" placeholder="*****@qq.com" required autofocus/>
        </p>

        <p><span>16位授权码：</span>
            <!-- 在下面的横线中填写`必填属性`和`自动聚焦` -->
            <input type="text" name="mail_pass" placeholder="16位授权码" required autofocus/>
        </p>

        <p><span>接收者邮箱：</span>
            <!-- 在下面的横线中填写`必填属性`和`自动聚焦` -->
            <input type="text" name="receivers" placeholder="*****@qq.com" required autofocus/>
        </p>

        <p><span>邮件标题：</span>
            <!-- 在下面的横线中填写`必填属性`和`自动聚焦` -->
            <input type="text" name="title" placeholder="标题" required autofocus/>
        </p>

        <p><span>邮件内容：</span>
            <!-- 在下面的横线中填写`必填属性`和`自动聚焦` -->
            <textarea style="width:200px; height:150px;" name="content" placeholder="输入想要发送的内容" required
                      autofocus></textarea>
            <!-- <input type="text_content" style="width:200px; height:150px;" name="content" placeholder="输入想要发送的内容" required readonly/>
            -->
        </p>

        <p class="btn">
            <input type="submit" value="提交"/>
        </p>
    </form>
</div>
</body>
<script>
    /*在这里编写submit()事件*/
    function submit() {
        $.ajax({
            url: "submit", /*数据提交到submit处*/
            type: "POST", /*采用POST方法提交*/
            data: {"sender": $("#sender").val(), "mail_pass": $("#mail_pass").val(),
                "receivers": $("#receivers").val(), "title": $("#title").val(),
                "content": $("#content").val()},/*提交的数据（json格式），从输入框中获取*/
            /*result为后端函数返回的json*/
            success: function (result) {
                if (result.message == "success!") {
                    alert(result.message)
                } else {
                    alert(result.message)
                }
            }
        });
    }
</script>
</html>

app.py

import smtplib
from email.header import Header
from flask import Flask, render_template, request
from email.mime.text import MIMEText


def sendMail(mail_host, mail_pass, sender, title, content, receivers):
    # 设置email信息
    # 邮件内容设置
    message = MIMEText(content, 'plain', 'utf-8')
    # 邮件主题
    subject = title
    message['Subject'] = Header(subject, 'utf-8')
    # 发送方信息
    message['From'] = sender
    # 接受方信息
    message['To'] = receivers
    # 登录并发送邮件
    try:
        smtpObj = smtplib.SMTP_SSL("smtp.qq.com", 465)
        # 连接到服务器
        smtpObj.connect(mail_host, 465)
        # 登录到服务器
        smtpObj.login(sender, mail_pass)
        # 发送
        smtpObj.sendmail(sender, receivers, message.as_string())
        # 退出
        smtpObj.quit()
        return {'message': "success!"}
    except smtplib.SMTPException as e:
        return {'message': "error!"}  # 打印错误


app = Flask(__name__)


@app.route("/")
def index():
    return render_template("index.html")


@app.route('/test', methods=['GET', 'POST'])
def submit():
    # 由于POST、GET获取数据的方式不同，需要使用if语句进行判断
    if request.method == "POST":
        mail_host = "smtp.qq.com"
        sender = request.form.get("sender")
        mail_pass = request.form.get("mail_pass")
        receivers = request.form.get("mail_pass")
        title = request.form.get("title")
        content = request.form.get("content")
        sendMail(mail_host, mail_pass, sender, title, content, receivers)
    if request.method == "GET":
        mail_host = "smtp.qq.com"
        sender = request.args.get("sender")
        mail_pass = request.args.get("mail_pass")
        receivers = request.args.get("mail_pass")
        title = request.args.get("title")
        content = request.args.get("content")
        sendMail(mail_host, mail_pass, sender, title, content, receivers)
    else:
        return " 'it's not a POST operation! "


if __name__ == "__main__":
    app.run(port=8080)  # True表示开始debug模型

输入数据后控制台的展示

url有问题吧

用的jquery,但是没有看到你把submit函数绑到input按钮上，所以你点击不会调用你的submit函数
由于form执行默认行为，你的action是#，导致发送的url是错误的
改正方式
action='/test'
或者
将submit函数用onclick="submit()"绑定进去