Initialize basic API

.gitignore

@@ -0,0 +1,4 @@
+.idea/*
+*.swp
+*.log
+infra-dashboard

Http/utils.go

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+package http
+
+import (
+	"fmt"
+	"io"
+	"net/http"
+)
+
+func RequestHandler(w http.ResponseWriter, r *http.Request) {
+	fmt.Fprint(w, "Hello, World!")
+}
+
+func HealthHandler(w http.ResponseWriter, _ *http.Request) {
+	_, _ = io.WriteString(w, "OK")
+}

Tools/utils.go

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+package Tools
+
+import (
+	"log"
+	"os"
+
+	"github.com/joho/godotenv"
+)
+
+// ReadDotEnvFile reads environment variables from .env file
+func ReadDotEnvFile(f string) {
+	err := godotenv.Load(f)
+	if err != nil {
+		log.Fatal("Error loading .env file")
+	}
+}
+
+// InitLog ensure log file exists and set appropriate flags (remove timestamp at start of line).
+func InitLog(p string) {
+	logFile, err := os.OpenFile(p, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
+	if err != nil {
+		panic(err)
+	}
+	log.SetOutput(logFile)
+	log.SetFlags(log.Flags() &^ (log.Ldate | log.Ltime))
+}

go.mod

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+module infra-dashboard
+
+go 1.20
+
+require (
+	github.com/alexflint/go-arg v1.4.3
+	github.com/gorilla/mux v1.8.1
+	github.com/joho/godotenv v1.5.1
+)
+
+require github.com/alexflint/go-scalar v1.1.0 // indirect

go.sum

@@ -0,0 +1,20 @@
+github.com/alexflint/go-arg v1.4.3 h1:9rwwEBpMXfKQKceuZfYcwuc/7YY7tWJbFsgG5cAU/uo=
+github.com/alexflint/go-arg v1.4.3/go.mod h1:3PZ/wp/8HuqRZMUUgu7I+e1qcpUbvmS258mRXkFH4IA=
+github.com/alexflint/go-scalar v1.1.0 h1:aaAouLLzI9TChcPXotr6gUhq+Scr8rl0P9P4PnltbhM=
+github.com/alexflint/go-scalar v1.1.0/go.mod h1:LoFvNMqS1CPrMVltza4LvnGKhaSpc3oyLEBUZVhhS2o=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/gorilla/mux v1.8.1 h1:TuBL49tXwgrFYWhqrNgrUNEY92u81SPhu7sTdzQEiWY=
+github.com/gorilla/mux v1.8.1/go.mod h1:AKf9I4AEqPTmMytcMc0KkNouC66V3BtZ4qD5fmWSiMQ=
+github.com/joho/godotenv v1.5.1 h1:7eLL/+HRGLY0ldzfGMeQkb7vMd0as4CfYvUVzLqw0N0=
+github.com/joho/godotenv v1.5.1/go.mod h1:f4LDr5Voq0i2e/R5DDNOoa2zzDfwtkZa6DnEwAbqwq4=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
+github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
+github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

main.go

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+// Receive and send informations about servers
+package main
+
+import (
+	h "infra-dashboard/Http"
+	tools "infra-dashboard/Tools"
+	"log"
+	"net/http"
+
+	"github.com/alexflint/go-arg"
+	"github.com/gorilla/mux"
+)
+
+var (
+	args struct {
+		Log     string `arg:"-l,--logfile" help:"location of output logfile." default:"/app/http-broadcaster.log"`
+		EnvFile string `arg:"-e,--envfile" help:"location of file containing environment variables." default:".env"`
+		Metrics bool   `arg:"--metrics" help:"enable prometheus exporter on /metrics." default:"false"`
+	}
+)
+
+func main() {
+	arg.MustParse(&args)
+	tools.InitLog(args.Log)
+	tools.ReadDotEnvFile(args.EnvFile)
+
+	router := mux.NewRouter()
+
+	router.HandleFunc("/", h.RequestHandler)
+	router.HandleFunc("/healthcheck", h.HealthHandler)
+
+	log.Fatal(http.ListenAndServe(":8080", router))
+}