Flask接收前端ajax传来的表单

HTML,包含一个text类型文本框和file类型上传文件

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>拍照</title>
</head>

<body>
    <h1>拍照上传演示</h1>
    <form id="upForm" enctype="multipart/form-data" method="POST">
        <p>
            <span>用户名:</span>
            <input type="text" name="username" />
        </p>
        <input name="pic" type="file" accept="image/*" capture="camera" />
        <a onclick="upload()">上传</a>
    </form>
    <img id="image" width="300" height="200" />
</body>
<script src="https://cdn.bootcss.com/jquery/3.4.1/jquery.min.js"></script>
<script>
    function upload() {
        var data = new FormData($("#upForm")[0]);   //注意jQuery选择出来的结果是个数组,需要加上[0]获取
        $.ajax({
            url: '/do',
            method: 'POST',
            data: data,
            processData: false,
            contentType: false,
            cache: false,
            success: function (ret) {
                console.log(ret)
            }
        })
      //return false	//表单直接调用的话应该返回false防止二次提交,<form οnsubmit="return upload()">
    }
</script>

</html>

Python

import os
from flask import Flask, render_template, request, jsonify
from werkzeug import secure_filename

TEMPLATES_AUTO_RELOAD = True

app = Flask(__name__)
app.config.from_object(__name__)
# 设置Flask jsonify返回中文不转码
app.config['JSON_AS_ASCII'] = False

PIC_FOLDER = os.path.join(app.root_path, 'upload_pic')


@app.route('/', methods=['GET'])
def hello():
    return render_template('index.html')


@app.route('/do', methods=['POST'])
def do():
    data = request.form
    file = request.files['pic']
    result = {'username': data['username']}
    if file:
        filename = secure_filename(file.filename)
        file.save(os.path.join(PIC_FOLDER, filename))
        result['pic'] = filename

    return jsonify(result)


if __name__ == '__main__':
    app.run(debug=False, host='0.0.0.0', port=8000)

Flask利用ajax进行表单请求和响应

前端html代码

<form id="demo_form">
    输入框: <input type="text" name="nick_name" />
    <input type="submit" value="ajax请求"/>
</form>

js代码

//首先需要禁止form表单的action自动提交
$("#demo_form").submit(function(e){
    e.preventDefault();

    $.ajax({
        url:"/demo",
        type:'POST',
        data: $(this).serialize(),   // 这个序列化传递很重要
        headers:{
            "X-CSRF-Token": getCookie('csrf_token')
        },
        success:function (resp) {
            // window.location.href = "/admin/page";
            if(resp.error){
                console.log(resp.errmsg);
            }
        }
    })
});

python Flask框架的代码

@app.route("/demo", methods=["POST"])
def demo():
    nick_name = request.form.get("nick_name")
    print(nick_name)
    return "ok"

表单序列化很重要,否则获取的数据是None。

总结

以上为个人经验,希望能给大家一个参考,也希望大家多多支持。

原文地址:https://lpwmm.blog.csdn.net/article/details/102871982

相关文章: