How to use Python to implement the file management function of CMS system

How to use Python to implement the file management function of a CMS system

With the development of the Internet, content management systems (CMS) play an important role in website development. As part of it, the file management function is an important part of supporting the CMS system. This article will introduce how to use Python language to implement the file management function of CMS system.

1. Requirements analysis of file management function
Before implementing the file management function, we need to conduct a needs analysis first. The file management function mainly includes the following requirements:

1. File upload: allows users to upload files to the system and save files to specified locations.
2. File download: Users can download files from the system, and the system needs to provide an interface for file downloading.
3. File list display: The system needs to be able to display the uploaded file list to facilitate user viewing and management.
4. File classification: Users can classify files to facilitate file organization and management.
5. File deletion: Users can delete files that are no longer needed, and the system needs to provide the file deletion function.

Based on the above requirements, we started to use Python to implement these functions.

2. Implement the file upload function
In Python, you can use the Flask framework to implement the file upload function. The following is a sample code:

from flask import Flask, request, render_template
from werkzeug.utils import secure_filename

app = Flask(__name__)

@app.route('/', methods=['GET', 'POST'])
def upload_file():
    if request.method == 'POST':
        file = request.files['file']
        if file:
            filename = secure_filename(file.filename)
            file.save('upload/' + filename)
            return '文件上传成功！'
    return render_template('upload.html')

if __name__ == '__main__':
    app.run()

The above code uses the request object of the Flask framework to obtain the uploaded file, and then uses the secure_filename function to securely process the file name. , and finally save to the specified location.

3. Implement the file download function
The file download function is relatively simple, and you only need to provide a link to download the file. The following is a sample code:

from flask import Flask, send_from_directory

app = Flask(__name__)

@app.route('/download/<filename>', methods=['GET'])
def download_file(filename):
    return send_from_directory('upload', filename)

if __name__ == '__main__':
    app.run()

In the above code, the file download function is implemented through the send_from_directory function of the Flask framework. Just pass in the directory and file name where the file is located.

4. Implement the file list display function
The file list display function can be implemented using the os module of the Flask framework. The following is a sample code:

import os
from flask import Flask, render_template

app = Flask(__name__)

@app.route('/', methods=['GET'])
def show_file_list():
    file_list = os.listdir('upload')
    return render_template('file_list.html', file_list=file_list)

if __name__ == '__main__':
    app.run()

In the above code, the file list in the specified directory is obtained through the os.listdir function, and then the file list is passed to the template file for display.

5. Implement the file deletion function
The file deletion function needs to be expanded on the basis of the file list display. The following is a sample code:

import os
from flask import Flask, render_template, request

app = Flask(__name__)

@app.route('/', methods=['GET', 'POST'])
def handle_file():
    if request.method == 'POST':
        file_name = request.form.get('file_name')
        if file_name:
            os.remove('upload/' + file_name)
            return '文件删除成功！'
    file_list = os.listdir('upload')
    return render_template('file_list.html', file_list=file_list)

if __name__ == '__main__':
    app.run()

In the above code, first obtain the file name to be deleted through the request.form.get method, and then use the os.remove function to delete the specified file.

6. Implementation of file classification function
The file classification function can be implemented using a database. The following is a sample code that uses the MySQL database to implement file classification:

import os
from flask import Flask, render_template
import MySQLdb

app = Flask(__name__)
db = MySQLdb.connect("host", "username", "password", "database")
cur = db.cursor()

@app.route('/', methods=['GET'])
def show_file_list():
    cur.execute("SELECT * FROM files")
    row = cur.fetchall()
    return render_template('file_list.html', file_list=row)

if __name__ == '__main__':
    app.run()
    cur.close()
    db.close()

In the above code, we connect to the MySQL database through the MySQLdb module and execute SQL statements to obtain the file list. The file list is then passed to the template file for display.

Through the above example code, we successfully implemented the file management function of the CMS system. Readers can further expand and optimize the code according to actual needs. I hope this article has provided some help to everyone in using Python to implement the file management function of the CMS system.

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