I've never encountered a simple yet efficient download manager that would be free AND still maintained.

So I decided to build my own and figured out it would be a great way to learn more about C++, multithreading, sockets and desktop applications and I did learn a lot along the way !

I could have used multiple non blocking sockets instead of threads and therefore only use one thread for the download manager part, but I really wanted to learn more about multithreading and its pitfalls.

The main window is actually made of 2 subwindows: the downloads list displayed as a curses menu and a 'downloads status' window sitting next to it and updated in its own thread. Using different threads for windows was also a challenge since curses (actually ncurses) is not multi-thread safe, but using C++ mutexes I managed to make it work smoothly.

I plan on adding some other useful features like limiting the number of simultaneous transfers or adding more than one link at the same time.

NOTE: install.sh doesn't work on Big Sur. I have to make a few changes in CMakeLists.txt. In the meantime use the command in compileMacOs.txt to compile.

- Works on macOS (>= 10.14) and Linux Debian based distributions
- Supports Direct Download Links
- Supports simultaneous transfers (tested up to 32)
- Transfers can be paused / resumed / killed
- Inactive transfers can be cleared from the list
- Displays current download speed and progress for each transfer
- Displays current transfer status
- Signals user input and URL / HTTP errors
- Very low CPU / memory consumption
- Partially supports adding multiple links at the same time

Works on Linux Debian based distributions and macOS (>= 10.14)

1. Make sure you have the following dependencies installed:

    cmake

2. Clone this repo

    git clone https://github.com/guimauveb/tinyDLM.git

3. Run install.sh

• macOS Big Sur (>= 11.0)
• macOS Mojave (10.14.6)
• Linux Ubuntu (20.04 LTS)
• Kali Linux (20.03)

On macOS Big Sur, since an unkown change the linker is unable to find some libraries. Unfortunately I don't have time to investigate. It still works fine on Linux and previous macOS versions.

The code uses the following style convention:

- ProperCase class and struct names.
- camelCase functions (lower case initial letter).
- snake_case variables.

NOTE: I'm still working on improving the code and code style.

- [X] Duplicate filename checker 
- [X] Create a "settings" window
- [X] Set download directory (transfers are stored by default in ~/Downloads/tinyDownloads/) 
- [X] Set the default number of simultaneous transfers to the number of CPU cores / threads
- [ ] Set the number of max simultaneous transfers  
- [ ] Set maximum download speed
- [ ] Add multiple links at the same time 
- [ ] Use a database to store downloads state
- [ ] Limit download speed in DownloaderCore 
- [ ] Schedule download start  
- [ ] Compute / Display ETA