Project: Secure Temporary File Upload Service

This project provides a secure, temporary file-upload service with time-limited access. It generates a unique URL for file uploads, includes CAPTCHA protection, and sends the URL to the user via email. The following is a list of key functionalities and features implemented in this project.

Key Features

1. Secure URL Registration

   • Generates a unique URL for each request.
   • Protects URL generation with CAPTCHA to prevent abuse.

2. Time-Limited URL Access

   • URL expires 48 hours after creation.
   • URL is sent only to the provided email address.
   • After the URL is activated, the expiration time reduces to 1 hour for security.

3. User File Upload

   • Allows users to upload files up to 1GB.
   • Displays upload progress, including elapsed and remaining time estimates.

4. File Storage on NextCloud

   • Uploaded files are stored in a fixed folder within NextCloud storage.
   • Original filenames are replaced with a new generated name for privacy.

5. Metadata Generation

   • A .txt metadata file is created for each uploaded file.
   • The metadata file contains the original filename and the sender’s email address.

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Install

Example for FreeBSD:

Redis:

$ pkg install redis
$ service redis enable

$ php -v
PHP 8.3.9 (cli) (built: Sep 21 2024 02:23:37) (NTS)

$ pkg install php83-pecl-redis
service php-fpm restart

phpmailer:

composer --version
composer install
composer show


composer require phpmailer/phpmailer

Configure

1. Prepare config.php

$ cp config/.config.php.default config/.config.php

2. Edit config.php

   Fill NextCloud data for connect

3. Configure NGINX.

   Main page upload.php

  location ~ /\.(?!php).* {
    deny all;
    access_log off;
    log_not_found off;
  }

  location ~ ^/upload/.*\.php$ {
    root  /usr/local/www;
    fastcgi_pass 127.0.0.1:9000;
    fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
    include fastcgi_params;
  }

  location /upload {
    root  /usr/local/www;
    index upload.php;
    try_files $uri $uri/ =404;
  }

Examples:

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5. 

6. 

7. 

NextCloud:

1. 

2.