本文執行個體講述了Python使用Flask架構同時上傳多個檔案的方法，分享給大家供大家參考。具體如下：
下面的示範代碼帶有詳細的html頁面和python代碼
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 uploadedfrom flask import Flask, render_template, request, redirect, url_for, send_from_directoryfrom werkzeug import secure_filename# Initialize the Flask applicationapp = Flask(__name__)# This is the path to the upload directoryapp.config['UPLOAD_FOLDER'] = 'uploads/'# These are the extension that we are accepting to be uploadedapp.config['ALLOWED_EXTENSIONS'] = set(['txt', 'pdf', 'png', 'jpg', 'jpeg', 'gif'])# For a given file, return whether it's an allowed type or notdef 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代碼
<!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頁面：
<!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>
希望本文所述對大家的Python程式設計有所協助。
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