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python怎么实现文件上传界面

爱喝马黛茶的安东尼

2019-09-23 09:46:214412浏览 · 0收藏 · 0评论

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')