Reverse Proxy

Simple reverse proxy to proxy requests based on the first path segment to the correct service in order to substitute services partially in local development.

Installation

git clone https://github.com/akullpp/groxy.git

Configuration

Create a .env.local of the following form:

FOO=http://localhost:1000
BAR=http://localhost:2000

Requests which paths start with FOO (e.g. foo/baz) will be forwarded to http://localhost:1000 (e.g http://localhost:1000/foo/baz).
Requests which paths start with BAR (e.g. bar/baz) will be forwarded to http://localhost:2000 (e.g http://localhost:2000/bar/baz).
Requests which first path segment do not match will be forwarded to the DEFAULT value in .env (e.g. http://localhost:8080).

You also have the ability to drop the path prefix, by adding <PREFIX>_DROP_PREFIX=true, e.g.

FOO=http://localhost:1000
BAR=http://localhost:2000
BAR_DROP_PREFIX=true

This will forward requests of localhost:9999/bar/baz to localhost:2000/baz.

Usage

go run ./main.go

I suggest to use reflex in order to restart the server if the .env.local changes:

reflex -r '\.env\.local' -s -- sh -c 'go run ./main.go'

Example

If you want to route requests that start with user to http://localhost:8100:

USER=http://localhost:8100

Dependencies

I extracted the reading of the reading of environment files to another package (see gotenv) which only uses the standard library.