httpecho is a simple tool which echoes incoming HTTP requests back to its clients.
It is useful for testing and debugging HTTP clients and reverse proxies, showing the exact request which arrives to the endpoint. It is inspired by httpbin but it is much simpler, and it was created with the intention to be easily runnable on multiple ports at the same time.
httpecho can be installed with go get:
go get github.com/theag3nt/httpecho
Prebuilt binaries of tagged versions are available on the GitHub releases page.
httpecho [ip] <port> [port]...
httpecho will bind to the IP address and ports specified, echoing incoming HTTP requests (including the request line and headers) as text. If you do not specify an IP address (or the first argument is an invalid IP, but a valid port number) it assumes 0.0.0.0 and listens on all interfaces.
Incoming requests are also logged to the standard error output in the following format:
2006/01/02 15:04:05 GET request from 192.168.0.2 on 192.168.0.1:8080
^^^ ^^^^^^^^^^^ ^^^^^^^^^^^^^^^^
request method remote host local host and port
This will listen for requests on all network interfaces on the standard HTTP port:
httpecho 80
This will listen for requests on the local machine on ports 8080 and 8081:
httpecho 127.0.0.1 8080 8081
The following is a sample output from httpecho running on two ports, receiving a request on each one:
$ httpecho 8080 8081
2006/01/02 15:04:05 Listening on 0.0.0.0:8080
2006/01/02 15:04:05 Listening on 0.0.0.0:8081
2006/01/02 15:04:10 GET request from 127.0.0.1 on localhost:8080
2006/01/02 15:04:20 POST request from 127.0.0.1 on localhost:8081
While httpecho was running, we have sent two requests using curl:
$ curl localhost:8080
GET / HTTP/1.1
Host: localhost:8080
Accept: */*
User-Agent: curl/7.47.0
$ curl -X POST -d hello=world -d http=echo localhost:8081
POST / HTTP/1.1
Host: localhost:8081
Accept: */*
Content-Length: 21
Content-Type: application/x-www-form-urlencoded
User-Agent: curl/7.47.0
hello=world&http=echo