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Command leproxy implements https reverse proxy with automatic Letsencrypt usage for multiple hostnames/backends

Install:

go install github.com/artyom/leproxy@latest

Run:

leproxy -addr :https -map /path/to/mapping.txt -cacheDir /path/to/letsencrypt

mapping.txt contains host-to-backend mapping, where backend can be specified as:

  • http/https url for http(s) connections to backend without passing "Host" header from request;
  • host:port for http over TCP connections to backend;
  • absolute path for http over unix socket connections;
  • @name for http over abstract unix socket connections (linux only);
  • absolute path with a trailing slash to serve files from a given directory.

Example:

subdomain1.example.com: 127.0.0.1:8080
subdomain2.example.com: /var/run/http.socket
subdomain3.example.com: @abstractUnixSocket
uploads.example.com: https://uploads-bucket.s3.amazonaws.com
# this is a comment, it can only start on a new line
static.example.com: /var/www/

Note that when @name backend is specified, connection to abstract unix socket is made in a manner compatible with some other implementations like uWSGI, that calculate addrlen including trailing zero byte despite documentation not requiring that. It won't work with other implementations that calculate addrlen differently (i.e. by taking into account only strlen(addr) like Go, or even UNIX_PATH_MAX).