httprecorder acts almost as a normal proxy. It records http requests and responses when running in recording mode (-record), and replays the stored responses when running in replay mode (-replay).

I use it to run microservices (simple) integration tests.

Default bind address and port: 0.0.0.0:8080. It can be changed setting HTTPRECORDER_BINDADDR environment variable.

httprecorder.json can be placed into project directory or, preferably, in /etc/httprecorder

• filename: Where to dump (or read from) the recorded content.
• default_host: Where every request that does not match one of paths will be routed to.
• paths: Where to route specific requests. If path ends with / it's interpreted as "begins with".

{
	"filename": "recording.json",
	"default_host": {
		"host": "http://localhost:6666"
	},
	"paths": {
		"/badservice/status/400": {
			"host": "http://localhost:6666"
		},
		"/badservice/status/403": {
			"host": "http://localhost:6666"
		},
		"/badservice/status/404": {
			"host": "http://localhost:6666"
		},
		"/data/2.5/": {
			"host": "http://api.openweathermap.org:80"
		}
	}
}

httprecorder is still in a very early stage. There's code that can be improved for sure.