Python使用Flask框架同时上传多个文件的方法_Python

本文实例讲述了Python使用Flask框架同时上传多个文件的方法，分享给大家供大家参考。具体如下：

下面的演示代码带有详细的html页面和python代码

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									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/<filename>')

									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

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									<!DOCTYPE html>

									<html lang="en">

									 <head>

									  <link href="bootstrap/3.0.0/css/bootstrap.min.css"

									  rel="stylesheet">

									 </head>

									 <body>

									  <div class="container">

									   <div class="header">

									    <h3 class="text-muted">How To Upload a File.</h3>

									   </div>

									   <hr/>

									   <div>

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

									   <input type="file" multiple="" name="file[]" class="span3" /><br/>

									    <input type="submit" value="Upload" class="span2">

									   </form>

									   </div>

									  </div>

									 </body>

									</html>

upload.html页面：

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									<!DOCTYPE html>

									<html lang="en">

									 <head>

									  <link href="bootstrap/3.0.0/css/bootstrap.min.css"

									     rel="stylesheet">

									 </head>

									 <body>

									  <div class="container">

									   <div class="header">

									    <h3 class="text-muted">Uploaded files</h3>

									   </div>

									   <hr/>

									   <div>

									   This is a list of the files you just uploaded, click on them to load/download them

									   <ul>

									    {% for file in filenames %}

									     <li><a href="{{url_for('uploaded_file', filename=file)}}">{{file}}</a></li>

									    {% endfor %}

									   </ul>

									   </div>

									   <div class="header">

									    <h3 class="text-muted">Code to manage a Upload</h3>

									   </div>

									   <hr/>  

									<pre>

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

									def upload():

									  # Get the name of the uploaded file

									  #file = request.files['file']

									  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))

									      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)

									</pre>

									   </div>

									  </div>

									 </body>

									</html>