A dead-simple, self-hostable file-upload service, written in C using Mongoose.

This project is largely based off of my pacebin, itself based off of my clink project. The code is nearly identical to that found on pacebin, as they're pretty much the exact same thing.

Please access this project on my Gitea instance, NOT GitHub.

Features

• Tiny executable size (~80kb)
• No dependencies, just libc
• Extremely simple to use--basic POST and GET
• No bloated webapp, just a simple reverse proxy
• Super light on resources
• Basic and easy file deletion
• No duplicate filenames
• Fast!
• Basic filesystem storage--easy to manage without external programs/libraries

Self-Hosting

You can host this yourself.

Note: all commands here are done as root.

Building & Installing

To build this project, you'll need a libc implementation (only tested with glibc), optionally a separate libcrypt implementation, and Git. Most Linux distributions should have all of these by default, but in case yours doesn't:

• pacman -S glibc libxcrypt git
• emerge --ask sys-libs/glibc dev-vcs/git
• apt install glibc git

1. Clone this repository:

git clone https://git.swurl.xyz/swirl/trance && cd trance

2. Now, you need to compile. When compiling, you can easily change the maximum size of uploaded files. Simply specify the variable MAX_SIZE; i.e. for a 100MB limit: make MAX_SIZE=104857600. This defaults to 50MB.

make

3. Now, you need to install. NGINX and systemd files are provided in this project; you may choose not to install them.

For all install commands, you may optionally provide prefix and DESTDIR options. This is useful for packagers; i.e. for a PKGBUILD: make prefix=/usr DESTDIR=${pkgdir} install.

Available install commands are as follows:

• make install installs the executable, NGINX, and systemd files.
• make install-bin installs the executable file.
• make install-systemd installs the systemd file, as well as its environment file.
• make install-nginx installs the NGINX file.

For example, on a non-systemd system using NGINX, you would run make install-bin install-nginx.

4. If using systemd, change the environment file to reflect your desired options:

vim /etc/trance.conf

5. You can now enable and start the service:

systemctl enable --now trance

The server should now be running on localhost at port 8082.

NGINX Reverse Proxy

An NGINX file is provided with this project. Sorry, no support for Apache or lighttpd or anything else; should've chosen a better HTTP server.

For this, you'll need NGINX (obviously), certbot, and its NGINX plugin. Most Linux distributions should have these in their repositories, i.e.:

• pacman -S nginx certbot-nginx
• emerge --ask www-servers/nginx app-crypt/certbot-nginx
• apt install nginx python-certbot-nginx

This section assumes you've already followed the last.

1. Change the domain in the NGINX file:

sed -i 's/your.doma.in/[DOMAIN HERE]' /etc/nginx/sites-available/trance

2. Enable the site:

ln -s /etc/nginx/sites-{available,enabled}/trance

3. Enable HTTPS for the site:

certbot --nginx -d [DOMAIN HERE]

4. Enable and start NGINX:

systemctl enable --now nginx

If it's already running, reload:

systemctl reload nginx

Your site should be running at https://your.doma.in. Test it by going there, and trying the examples. If they don't work, open an issue.

Contributions

Contributions are always welcome.

FAQ

A user has made a file containing bad content! What do I do?

Clean it up, janny!

Deleting a file can be done simply by running:

rm /srv/trance/*/SHORTIDHERE

The short ID is the random hexadecimal string BEFORE the filename. You can usually find it through NGINX logs or something.

Replace /srv/trance with whatever your data directory is.

Can I blacklist certain words from being used in files and filenames?

No. While it might be possible through some NGINX stuff, this is not supported nor it is encouraged.

Is this an IP grabber?

No. If access logs are turned on, then the server administrator can see your IP, but management of access logs is up to them.

Can I use this without a reverse proxy?

Probably, I don't know. Won't have HTTPS though, so either way, I heavily recommend you use a reverse proxy.

What's the seed for?

The seed is used for generating deletion keys. Do not share it whatsoever.

What operating systems are supported?

I've only tested it on my Arch Linux server, but it should work perfectly fine on all Linux distributions. Probably doesn't work on Windows.

Can I run this in a subdirectory of my site?

Yes. Simply put the proxy_pass directive in a subdirectory, i.e.:

location /paste {
    proxy_pass http://localhost:8082;
}

Why'd you make this?

Every file upload service sucks. Simple as. All of the self-hostable options I could find had problems, including:

• Loads of unnecessary dependencies
• Huge executable size (Go lol)
• Used some bloated webapp with no basic API
• Feature bloat; i.e. encryption, auto-expiration, etc.
• Written in Ruby, NodeJS, PHP, or some other bad language
• No direct reverse-proxy support
• Reliance on statically serving the index files
• Reliance on static configuration like the host
• Reliance on other services (i.e. link shorteners)

This project is intended to be a file upload service that is as simple as possible. Literally just upload, download, and delete files. That's it.

Also, there were surprisingly none written in C.