HTTPS webserver supporting GET and HEAD requests.
With HTTP server serving redirects to HTTPS server.
Combines with directory listings made by htmldirs repo.
This is a fun/learning project only. Written on and for Linux.

meson build --prefix="$installdirectory"
cd build
ninja
ninja install

Executables will be placed in $installdirectory.
Website files go in $installdirectory/files.
Configuration files must be in $installdirectory/config

meson, ninja (for building)
openssl

Instead of running as superuser, you can use capabilities to give the binaries permission to bind on ports <1000:

setcap CAP_NET_BIND_SERVICE ep ./webserver
setcap CAP_NET_BIND_SERVICE ep ./httpredirect

Run with:

./webserver $port

Run HTTP server with:

./http $port

SSL Configuration: Relative to the directory the executables are run in, you must provide a "config/certs.txt" file with the file locations (relative to the executable) of the certificate and the private key. Certificate location on first line, private key on second line.
Domain name configuration: You must provide "config/domain.txt" file which contains only the address of the HTTPS website, eg https://localhost.
Examples are included in the bin/config directory in the repository.

Files
Helpers: generic hashtable, strings
HTTP: load request headers into struct, process response headers struct into string
SSL: set up and destroy openSSL

Request headers taken into account:
HTTP version
DNT
Connection
If-Modified-Since
-- Further request headers are processed into a request headers struct by http module

Response headers used:
Content-Disposition
Content-Length
Content-Language
Content-Type (implemented with hash table mapping file extension to MIME type)
Date
Last-Modified
Tk
Content-Security-Policy
X-Content-Type-Options
X-Frame-Options
Referrer-Policy
Strict-Transport-Security

Directory welcome pages:
1. index.html
2. .directory.html (can be created by htmldirs repo)
3. 404