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HostSplitter

HostSplitter is an HTTP reverse proxy and load balancer that distributes requests to an arbitrary amount of sites based on the Host header.

Motivation

I commonly run into an issue developing small golang websites: I want to use the same IP address for many sites that aren't large enough to justify their own server.

Site files

HostSplitter will look for site files by default in "/etc/hostsplitter/". HostSplitter will only read files with the .json extension.

A each site file should look like

{
	"hostnames": [
		"ammar.io",
		"www.ammar.io"
	],
	"backends": [
		"127.0.0.1:9000"
	],
	"secret": "puppies1234"
}

The "secret" field is passed along with every request to that site in the X-Hostsplitter-Secret header. This is intended to be checked before trusting the passed along IP.

Real IP

The original requester's IP is located in the X-Forwarded-For header.

Reloading

HostSplitter provides 0 downtime reload functionality via SIGUSR1. E.g

pkill -10 hostsplitter

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