sr-71, a small web server

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The last airplane designed without the use of electronic calculators, the SR-71 was developed from concept to first flight in just over 2 years. It flew higher and faster than any jet of its time holding the speed record to this day, and pioneered low-observability (stealth) characteristics.

This sr-71 project is a small web server, able to host your pages on the gemini, gopher, spartan, nex, and finger protocols.

Getting it

sr-71 is a single-package go project, so using the go toolchain installing is as simple as:

go install tildegit.org/tjp/sr-71@latest

Currently binaries are not made available for download, so the go command is a requirement.

Running it

sr-71 requires a configuration file, the path of which is provided as the only command-line argument.

sr-71 /path/to/sr71.conf

Highlights

sr-71 isn't just a multi-protocol static file server. It also features:

• virtualhosting on protocols which support it
• SNI support when virtualhosting with TLS
• CGI
• extensions to the gophermap format borrowed from gophernicus
• automatic generation of atom resources from subscribable gemini pages
• privilege dropping
• client TLS certificate authentication
• support for titan (the gemini "write" companion protocol) with separately-configurable auth
• git repository viewers with overridable templates
• user-specific paths for shared hosting environments

Configuration File

The format of the config file is designed to be straightforward, and human-readable and -writable.

Here's a simple configuration that would get you off the ground:

systemuser nobody

gemini {
	host myhostname.com, gemini.myhostname.com
	servertls key /path/to/tls/keyfile cert /path/to/tls/certfile

	static /var/gemini at / with dirdefault index.gmi, dirlist
}

gopher {
	host myhostname.com

	static /var/gopher at / with dirdefault gophermap, dirlist, extendedgophermap
}

spartan {
	host myhostname.com

	static /var/spartan at / with dirdefault index.gmi, dirlist
}

finger {
	static ~/.finger
}

With the above configuration, sr-71 will:

• drop privileges to the "nobody" user
• respond to any gemini requests to the domains myhostname.com or gemini.myhostname.com by reading files out of /var/gemini
• for gemini directory requests, it will first look for an index.gmi file, then fall back to listing the directory's contents in gemtext
• serve gopher by reading out of /var/gopher
• for gopher directory requests, it will look for a file called "gophermap", then fall back to listing the contents as gopher menu
• for any gopher files, it will apply the "extended gophermap" parsing (see REFERENCE.gmi)
• serve spartan by reading files from /var/spartan (perhaps imagine this being a symlink to /var/gemini)
• serve spartan directory requests by looking for index.gmi and falling back to a directory listing
• serve finger requests by reading a ".finger" file in the requested user's home directory

More information is in the reference documentation