Ecng.Backup.Mega

Mega.nz backup provider implementing IBackupService.

Overview

MegaService provides cloud backup capabilities using Mega.nz encrypted cloud storage. All data is end-to-end encrypted automatically.

Usage

Creating the Service

using System.Security; using Ecng.Backup; using Ecng.Backup.Mega; // Create secure password var password = new SecureString(); foreach (char c in "your-password") password.AppendChar(c); password.MakeReadOnly(); var mega = new MegaService( email: "your-email@example.com", password: password ); // Login happens automatically on first operation

Features

Feature	Supported
CanPublish	Yes (permanent links only)
CanExpirable	No
CanFolders	Yes
CanPartialDownload	No

Creating Folders

Unlike S3-like services, Mega requires explicit folder creation:

// Create nested folder structure var folder = new BackupEntry { Name = "backups" }; var subfolder = new BackupEntry { Name = "2024", Parent = folder }; var deepFolder = new BackupEntry { Name = "january", Parent = subfolder }; // Creates: /backups/2024/january await mega.CreateFolder(deepFolder); // Parent folders are created automatically if they don't exist

Uploading Files

// First ensure parent folder exists var folder = new BackupEntry { Name = "backups/2024" }; await mega.CreateFolder(folder); // Upload file to folder var entry = new BackupEntry { Name = "data.zip", Parent = folder }; await using var stream = File.OpenRead(@"C:\data.zip"); await mega.UploadAsync(entry, stream, progress => { Console.WriteLine($"Upload: {progress}%"); });

Downloading Files

var folder = new BackupEntry { Name = "backups/2024" }; var entry = new BackupEntry { Name = "data.zip", Parent = folder }; await using var stream = File.Create(@"C:\downloaded-data.zip"); await mega.DownloadAsync(entry, stream, null, null, progress => { Console.WriteLine($"Download: {progress}%"); }); // Note: Partial downloads are not supported

Listing Files

// List files in folder var folder = new BackupEntry { Name = "backups" }; await foreach (var item in mega.FindAsync(folder, criteria: null)) { Console.WriteLine($"{item.Name}: {item.Size} bytes"); } // List root folder await foreach (var item in mega.FindAsync(null, criteria: null)) { Console.WriteLine(item.Name); } // Filter by name await foreach (var item in mega.FindAsync(folder, criteria: "zip")) { Console.WriteLine(item.Name); // Only items containing "zip" }

Publishing Files

var entry = new BackupEntry { Name = "shared-file.pdf", Parent = folder }; // Get public share link string publicUrl = await mega.PublishAsync(entry); Console.WriteLine($"Share link: {publicUrl}"); // Example: https://mega.nz/file/abc123#key // Remove public access await mega.UnPublishAsync(entry);

Deleting Files

var entry = new BackupEntry { Name = "old-backup.zip", Parent = folder }; await mega.DeleteAsync(entry);

Getting File Info

var entry = new BackupEntry { Name = "data.zip", Parent = folder }; await mega.FillInfoAsync(entry); Console.WriteLine($"Size: {entry.Size}"); Console.WriteLine($"Modified: {entry.LastModified}");

Important Notes

1. Login is automatic: The first operation triggers login
2. End-to-end encryption: All files are encrypted client-side
3. No partial downloads: You must download entire files
4. No expiring links: Share links are permanent until unpublished
5. Folder structure: Explicit folder creation is required

NuGet

Install-Package Ecng.Backup.Mega

Dependencies

• Ecng.Backup
• Ecng.Collections
• Nito.AsyncEx