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Python使用Flask框架同时上传多个文件
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Python使用Flask框架同时上传多个文件的方法
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Python使用Flask框架同时上传多个文件的方法简介提炼代码源代码
简介
flask官方上传文档介绍 secure_filename方法的好处 提炼代码 #!/usr/bin/python # -*- coding: UTF-8 -*- # ************************************* # Author: jenrey # Time: 2021-11-08 16:04 # Desc: flask_upload.py # ************************************* import os from flask import Flask, request from werkzeug.utils import secure_filename # http://docs.jinkan.org/docs/flask/patterns/fileuploads.html app = Flask(__name__) """ http://docs.jinkan.org/docs/flask/patterns/fileuploads.html """ # app.config内的配置名均为固定搭配 # 储存上传的文件的地方 app.config['UPLOAD_FOLDER'] = 'uploads/' # 允许的文件类型的集合 app.config['ALLOWED_EXTENSIONS'] = set(['txt', 'pdf', 'png', 'jpg', 'jpeg', 'gif', 'sh']) # 上传文件限制为最大 16MB，如果请求传输一个更大的文件， Flask 会抛出一个 RequestEntityTooLarge 异常。 app.config['MAX_CONTENT_LENGTH'] = 16 * 1024 * 1024 def allowed_file(filename): """ 判断传入的文件后缀是否合规。不合规返回False :param filename: :return: True or False """ return '.' in filename and filename.rsplit('.', 1)[1] in app.config['ALLOWED_EXTENSIONS'] @app.route('/upload', methods=['POST']) def upload(): # postman：POST -> Body -> form-data -> KEY=file[] uploaded_files = request.files.getlist("file[]") filenames = [] error_filenames = [] for file in uploaded_files: if file and allowed_file(file.filename): filename = secure_filename(file.filename) file.save(os.path.join(app.config['UPLOAD_FOLDER'], filename)) filenames.append(filename) else: # 文件后缀不符合类型或者文件太大 error_filenames.append(file.filename) if error_filenames: # 有文件上传失败的情况 result = { 'code': 200, 'result': 'failure', 'message': ",".join(error_filenames) } return result else: result = { 'code': 200, 'result': 'success', 'message': '' } return result if __name__ == '__main__': app.run( host="0.0.0.0", port=int("8091"), debug=True )
https://www.jb51.net/article/62606.htm https://getbootstrap.com/docs/4.0/getting-started/download/ import os # We'll render HTML templates and access data sent by POST # using the request object from flask. Redirect and url_for # will be used to redirect the user once the upload is done # and send_from_directory will help us to send/show on the # browser the file that the user just uploaded from flask import Flask, render_template, request, redirect, url_for, send_from_directory from werkzeug import secure_filename # Initialize the Flask application app = Flask(__name__) # This is the path to the upload directory app.config['UPLOAD_FOLDER'] = 'uploads/' # These are the extension that we are accepting to be uploaded app.config['ALLOWED_EXTENSIONS'] = set(['txt', 'pdf', 'png', 'jpg', 'jpeg', 'gif']) # For a given file, return whether it's an allowed type or not def allowed_file(filename): return '.' in filename and \ filename.rsplit('.', 1)[1] in app.config['ALLOWED_EXTENSIONS'] # This route will show a form to perform an AJAX request # jQuery is loaded to execute the request and update the # value of the operation @app.route('/') def index(): return render_template('index.html') # Route that will process the file upload @app.route('/upload', methods=['POST']) def upload(): # Get the name of the uploaded files uploaded_files = request.files.getlist("file[]") filenames = [] for file in uploaded_files: # Check if the file is one of the allowed types/extensions if file and allowed_file(file.filename): # Make the filename safe, remove unsupported chars filename = secure_filename(file.filename) # Move the file form the temporal folder to the upload # folder we setup file.save(os.path.join(app.config['UPLOAD_FOLDER'],filename)) # Save the filename into a list, we'll use it later filenames.append(filename) # Redirect the user to the uploaded_file route, which # will basicaly show on the browser the uploaded file # Load an html page with a link to each uploaded file return render_template('upload.html', filenames=filenames) # This route is expecting a parameter containing the name # of a file. Then it will locate that file on the upload # directory and show it on the browser, so if the user uploads # an image, that image is going to be show after the upload @app.route('/uploads/') def uploaded_file(filename): return send_from_directory(app.config['UPLOAD_FOLDER'], filename) if __name__ == '__main__': app.run( host="0.0.0.0", port=int("80"), debug=True )index.html代码 DOCTYPE html> How To Upload a File.upload.html页面： DOCTYPE html> Uploaded files This is a list of the files you just uploaded, click on them to load/download them {% for file in filenames %} |
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