Sysinfo server

A simple server for retrieving system bootup duration. The returned duration is expressed in seconds.

The build command:

$ go build .

creates the executable sysinfo_server.

Usage example:

$ ./sysinfo_server &
[1] 30177

$ curl http://localhost:8080
Welcome to sysinfo_server, version 0.0.1
Available endpoints: /version, /duration

$ curl http://localhost:8080/version
0.0.1

$ curl http://localhost:8080/duration
170.94

Implementation note.

The response of duration does not report the unit in order to be easier to parse, and the choosen unit, seconds, is the one that satisfy better the principle of less surprise.

Duration are retrieved using systemd-analyze and parsing its output. The parsing is done using regular expressions and is currently the weakest part of the code. In order to keep it simply, several assumption are made about the output format of systemd-analyze.

Possible improvements

Providing the output in json would be possible in several ways. The most easy way would be by using the Gin framework, that would offer other benefits as the application grows in complexity.

Without using a framework it would still be possible to use encoding/json for structuring more complex data.