export PATH=$PATH:/usr/local/go/bin
export GOPATH=$HOME/go

source ~/.bashrc # для Bash
source ~/.zshrc # для Zsh

go version

go version go1.20.0 linux/amd64

package main

import (
 "fmt"
 "net/http"
)

func welcomeHandler(w http.ResponseWriter, r *http.Request) {
 fmt.Fprintf(w, "Welcome to my microservice!")
}

func main() {
 http.HandleFunc("/", welcomeHandler)
 http.ListenAndServe(":9000", nil)
}

go run main.go

package main

import (
"fmt"
"net/http"
)

func welcomeHandler(w http.ResponseWriter, r *http.Request) {
fmt.Fprintf(w, "Welcome to my microservice!")
}

func infoHandler(w http.ResponseWriter, r *http.Request) {
fmt.Fprintf(w, "This is a simple microservice built with Go.")
}

func main() {
http.HandleFunc("/", welcomeHandler)
http.HandleFunc("/info", infoHandler)
http.ListenAndServe(":9000", nil)
}

package main

import (
 "fmt"
 "net/http"
)

func welcomeHandler(w http.ResponseWriter, r *http.Request) {
 name := r.URL.Query().Get("name")
 if name == "" {
 name = "Guest"
 }
 fmt.Fprintf(w, "Welcome to my microservice, %s!", name)
}

func infoHandler(w http.ResponseWriter, r *http.Request) {
 fmt.Fprintf(w, "This is a simple microservice built with Go.")
}

func main() {
 http.HandleFunc("/", welcomeHandler)
 http.HandleFunc("/info", infoHandler)
 http.ListenAndServe(":9000", nil)
}

package main

import (
 "net/http"
 "net/http/httptest"
 "testing"
)

func TestWelcomeHandler(t *testing.T) {
 req, err := http.NewRequest("GET", "/", nil)
 if err != nil {
 t.Fatal(err)
 }
 rr := httptest.NewRecorder()
 handler := http.HandlerFunc(welcomeHandler)
 handler.ServeHTTP(rr, req)
 if status := rr.Code; status != http.StatusOK {
 t.Errorf("wrong status code: got %v want %v", status, http.StatusOK)
 }
 expected := "Welcome to my microservice, Guest!"
 if rr.Body.String() != expected {
 t.Errorf("unexpected body: got %v want %v", rr.Body.String(), expected)
 }
}

go test

go build -o my-web-service

scp my-web-service user@server:/path/to/deploy

./my-web-service