Ishi - Ad hoc HTTP Repeater

Ishi is ad hoc HTTP repeater/reverse proxy for development environment. It is simple and doesn't require file based configuration.

Motivation

Dinghy has made it easier to develop web applications on macOS using Docker. It has a DNS server and nginx-proxy that resolves virtual hosts, so that we can develop multiple web services with one Docker machine.

When developing web services for mobile, I have struggled with testing the site running on dinghy from the iPhone. I have often wired the Mac and iPhone to the same LAN, set up a DNS server on the Mac, connected iPhone to the DNS server...

I felt this setting is very complicated. Like stone command, which is a simple TCP repeater, much more easier way to connect iPhone and web applications on Dinghy was needed. Unfortunately, stone can repeat traffics at TCP level, but it doesn't rewrite Host in the HTTP header. So I made ishi. Ishi means a stone in Japanese.

Usage

Usage:
  ishi [-l=<port>] <upstream>
  ishi -h | --help
  ishi --version

Arguments:
  upstream  Upstream host.

Options:
  -h --help             Show help.
  --version             Show version.
  -l --listen=<port>    Specify port to listen.

Examples

Forwarding requests on 0.0.0.0:8000 to 192.168.99.100:80.

ishi 192.168.99.100

Forwarding requests on 0.0.0.0:80 to myapp.docker:80

ishi --listen 80 myapp.docker

Forwarding requests on 0.0.0.0:80 to myapp.docker:443

ishi --listen 80 https://myapp.docker

Installation

To install Ishi, please use go get:

go get github.com/suin/ishi

How Does It Works

1. Ishi starts to listen on Desktop (192.168.3.2:8000)

• Mobile device (192.168.3.2) on same LAN send HTTP request to http://192.168.3.2:8000
• Ishi fowards the request to Docker container. On the same time, Ishi overwrite Host header to app.docker from 192.168.3.2:8000 so that reverse proxy can foward the request to another container.
• The Docker container responds.
• Ishi forwards the response to the mobile device