Python使用Flask框架同时上传多个文件的方法

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

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

 
  
 
 
  

   

    
How To Upload a File.
   
   

   

   

   

    
   
   
  
 

upload.html页面：

 
  
 
 
  

   

    
Uploaded files
   
   

   

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

    {% for file in filenames %}
     
{{file}}
    {% endfor %}
   
   
   

    
Code to manage a Upload
   
   
  
@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)