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Python Flask框架中同时上传多个文件的详细代码示范

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Python Flask框架中同时上传多个文件的详细代码演示,下面的演示代码带有详细的html页面和python代码

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
# http://www.75271.com
@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


<!DOCTYPE html>
<html lang="en">
  <head>
    <link href="//netdna.bootstrapcdn.com/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. http://www.75271.com</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


<!DOCTYPE html>
<html lang="en">
  <head>
    <link href="//netdna.bootstrapcdn.com/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)



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