Simple HTTP Server in GO

A very simple HTTP server in GO for network routing tests.

The intent is to help infrastructure teams on test the network routing configurations without the need of complex services or install Python on the target server.

It will only return a HTTP 200 response code with some output for "debug".

Using

This section will assume that you are using bash on a linux/unix distribution.

To start listening on 8080 port:

./SimpleHttpServerInGO_x86_lin

To listen, for example, on 8088 port, do:

./SimpleHttpServerInGO_x86_lin 8088

The ouput on terminal for 8080 port is:

=-=-=-= HTTP Server to routing test =-=-=-=

port: 8080
   IP: [10.1.4.211 192.168.64.1 10.211.55.2 10.37.129.2]

Endpoints:
  /hello   - say's 'hello' and the current datetime of the server
  /headers - list request headers
  /        - same as '/hello'

cURL:
  curl -v http://10.1.4.211:8080
  curl -v http://10.1.4.211:8080/hello
  curl -v http://10.1.4.211:8080/headers

2025/01/17 18:14:38 URI      | Origin IP       | Remote Address  | HTTP Request Headers

When a request reach the program this generates a "log" as bellow:

2025/01/17 18:14:38 --------------------------------------------------------------------------------
2025/01/17 18:14:38 URI      | Origin IP       | Remote Address  | HTTP Request Headers
2025/01/17 18:14:38 --------------------------------------------------------------------------------
2025/01/17 18:14:43 /        | 127.0.0.1       | 127.0.0.1       | [User-Agent: curl/8.7.1] [Accept: */*]
2025/01/17 18:14:45 /hello   | 127.0.0.1       | 127.0.0.1       | [Accept: */*] [User-Agent: curl/8.7.1]
2025/01/17 18:14:47 /headers | 127.0.0.1       | 127.0.0.1       | [User-Agent: curl/8.7.1] [Accept: */*]

There you have:

• Requested URI
• Request origin IP, if present, show's X-Forwarded-For value.
• Request headers, delimited by brackets ([]).

The idea behind this log is an attempt to help on "debugging" (or "discover") the path witch the request had to follow to reach the target server.

Build

This project is built with Go so to build your own binaries, you have to install and configure it as described on official documentation.

All code are on main.go file, so your modifications can be done on it.

To run your modifications on code do:

go run main.go

To build a executable run:

go build

With the current configuration the output file name is SimpleHttpServerInGO, for windows it will have .exe extension.

The lack of comments on te code will be addressed on a later date. Contributions on this issue are welcomed.

Python simple HTTP server

If you arrived here because of the code snippet, use it.

If you have Python available on your environment you can start a simple HTTP server with the command:

Python 3:

python3 -m http.server 8080

Python 2:

python -m SimpleHTTPServer 8080

Conclusion

When this program was created, I couldn't use Python and need of something that had no dependencies, was "small" and when the tests ended was easy to "uninstall".

Hope this helps.