Gmid
gmid is a full-featured server for the Gemini hypertext protocol, with a "small, hackable codebase" written in C. It uses an event-based asynchronous I/O model; and supports modern features, which one might expect from a web server - such as virtual hosts, reverse proxy, default error pages, server-side page generation (via CGI and FastCGI), and Unicode hostnames/URIs (via punycode and IRI). It also can make use of Linux security features, such as 'seccomp' and 'landlock'.
1 Configuration
Gmid can be run locally in "config-less mode" for experimentation; but for production (public) use, you will need a domain name, and an SSL certificate for that domain.
If you keep the default config file (/etc/gmid/conf), files will be served from /srv/gemini/. The following commands will create a useful SSL certificate, automatically detected per the default config file:
$ N_DAYS=42000 # this can be any integer (the number of days before the certificate expires)
$ DOMAIN=gemini.myserver.net # this must be your domain or subdomain name
$ sudo openssl genrsa -out /etc/ssl/private/gmid.key 4096
$ sudo openssl req -new -x509 \
-key /etc/ssl/private/gmid.key \
-out /etc/ssl/certs/gmid.pem \
-days $N_DAYS -nodes \
-subj "/CN=${DOMAIN}"
$ sudo chmod 400 /etc/ssl/certs/gmid.pem /etc/ssl/private/gmid.key
$ sudo mkdir -p /srv/gemini/ $ sudo chown -R gmid:gmid /srv/gemini/
See man gmid for advanced configuration details.
2 Serving Documents
The document format is a very simple Markdown variant, called "gemtext". A sample home page will be installed at: /usr/share/gmid/index.gmi. Simply copy it to the server root (/srv/gemini/), to get started.
$ sudo cp /usr/share/gmid/index.gmi /srv/gemini/
The Project Gemini website has a complete "gemtext" Markdown syntax guide.
