How to use Python to develop the file compression function of CMS system

How to use Python to develop the file compression function of the CMS system

When developing the CMS system, the file compression function is a very common and practical function. Through file compression, you can reduce the size of files and save server storage space and bandwidth consumption. This article will introduce how to use Python to develop the file compression function of the CMS system and provide relevant code examples.

Python is a concise and powerful programming language with a wealth of libraries and modules that can easily implement file compression functions. In Python, we can use the zipfile module to compress and decompress files. The following is a simple code example that shows how to use the zipfile module to implement file compression.

import zipfile
import os

def compress_file(source_dir, output_path):
    file_list = []
    for root, dirs, files in os.walk(source_dir):
        for file in files:
            file_list.append(os.path.join(root, file))
    
    with zipfile.ZipFile(output_path, 'w', zipfile.ZIP_DEFLATED) as zipf:
        for file in file_list:
            arcname = os.path.relpath(file, source_dir)  # 保留原始目录结构
            zipf.write(file, arcname)
    
    print('文件压缩成功！')

source_dir = '/path/to/source/dir'
output_path = '/path/to/output/file.zip'

compress_file(source_dir, output_path)

In the above code, the compress_file function accepts two parameters: source_dir represents the path of the folder to be compressed, output_path represents the path of the compressed file Output path. The function first uses os.walk to traverse all files in the folder, adding the file path to the file_list list. Then, create a zip file object through zipfile.ZipFile, and use zipf.write to add files to the zip file one by one. Finally, close the zip file object and complete the file compression.

In actual development, the file upload function of the CMS system can be combined to compress the files uploaded by the user. Below is an example showing how to compress a user-uploaded file into a zip file.

import zipfile
import os

def compress_user_files(source_dir, output_path):
    user_files = request.FILES.getlist('files')
    
    with zipfile.ZipFile(output_path, 'w', zipfile.ZIP_DEFLATED) as zipf:
        for file in user_files:
            file_path = os.path.join(source_dir, file.name)
            with open(file_path, 'wb') as f:
                f.write(file.read())
            
            arcname = os.path.relpath(file_path, source_dir)
            zipf.write(file_path, arcname)
            os.remove(file_path)
    
    print('文件压缩成功！')

source_dir = '/path/to/source/dir'
output_path = '/path/to/output/file.zip'

compress_user_files(source_dir, output_path)

In the above code, the compress_user_files function accepts two parameters: source_dir represents the folder path to save the user uploaded files, output_path represents compression The output path of the file. The function first obtains the list of files uploaded by the user through request.FILES.getlist. Then, traverse the file list and write the file to the specified folder. After that, add the files to the zip file and use os.remove to remove the original files.

It should be noted that request.FILES.getlist is used in the above code to obtain the list of files uploaded by the user. This is a function that is assumed to exist in the CMS system. In actual development, it may be necessary to make corresponding modifications based on the specific CMS framework and upload function.

Through the above code examples, we can see that it is very simple to use Python to implement the file compression function of the CMS system. The zipfile module provides a wealth of functions and methods that can easily compress and decompress files. Developers can further improve and optimize the file compression function based on specific needs and combined with other functions of the CMS system.

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