python怎么实现文件上传界面

python

本文章代码上传在码云上

代码地址

git@gitee.com:DanYuJie/upanddown.git

这里我们使用flask框架,简单实用

目录结构:

upandown/

    static/

        css/

        js/

            jquery.min.js

            toastr.min.js

    templates/

            index.html

    test.py

相关推荐:《Python基础教程》

首先我们需要一个页面在templates/index.html(这里使用form表单实现)

<!DOCTYPE html>

<html>

<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">

    <link rel="stylesheet" href="../static/css/toastr.min.css">

    <script src="../static/js/jquery.min.js"></script>

    <script src="../static/js/toastr.min.js"></script>

    <title>Document</title>

</head>

<body>

    <form method="POST" action="/upload" enctype="multipart/form-data">

        <input type="file" name="file" id="file">

        <input type="submit" value="upload">

        <a href=""></a>

    </form><hr>

    <ol id="filelist">

    </ol>

    <script>

        function checkstatus(){

            if('{{status}}'== 'OK'){

                toastr['success']("上传成功");

            }else if('{{status}}'== 'null'){

                toastr['error']("上传失败");           

            }

        }

        function get_list(){

            $.ajax({

                url:'/getlist',

                type:'GET',

                success:function(result){

                    len_result = result.length;

                    for(var x =0; x < len_result; x++){

                        $("#filelist").append('<br><a href=/download/' + result[x] + '>' + result[x] 

                        +'</a>');

                    }

                    alert(content_list);

                },

                error:function(){

                    alert("失败");

                }

            });

        }

    checkstatus();

    get_list();

    </script>

</body>

</html>

然后是后台接收

test.py

#!/usr/bin/env python

# -*- coding:utf-8 -*-

from flask import Flask,render_template, request, send_from_directory,jsonify, redirect

import os

# import sys

# reload(sys)

# sys.setdefaultencoding('utf-8')

app = Flask(__name__)

# ALLOWED_EXTENSTIONS = set(['png', 'jpg', 'jpeg', 'gif'])

app.config['UPLOAD_FOLDER'] = os.getcwd()

download_floder = app.config['UPLOAD_FOLDER'] + '/upload'

def allow_file(filename):

    allow_list = ['png', 'PNG', 'jpg', 'doc', 'docx', 'txt', 'pdf', 'PDF', 'xls', 'rar', 'exe', 'md', 'zip'] 

    a = filename.split('.')[1]

    if a in allow_list:

        return True

    else:

        return False

@app.route('/main')

def home():

    return render_template('index.html')

@app.route('/getlist')

def getlist():

    file_url_list = []

    file_floder = app.config['UPLOAD_FOLDER'] + '/upload'

    file_list = os.listdir(file_floder)

    for filename in file_list:

        file_url = url_for('download',filename=filename)

        file_url_list.append(file_url)

    # print file_list

    return jsonify(file_list)

@app.route('/download/<filename>')

def download(filename):

    return send_from_directory(download_floder,filename, as_attachment=True)

@app.route('/upload', methods=['POST', 'GET'])

def upload():

    file = request.files['file']

    if not file:

        return render_template('index.html', status='null')

    # print type(file)

    if allow_file(file.filename):

        file.save(os.path.join(app.config['UPLOAD_FOLDER']+'/upload/', file.filename))

        return render_template('index.html', status='OK')

    else:

        return 'NO'

if __name__ == '__main__':

    app.run(debug=True, host='0.0.0.0')

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