Golang: Quick Start - cross compile & local server

install (on mac)

% brew install go

% go version 
go version go1.16.3 darwin/amd64

run

% cat hello.go 
package main

import "fmt"

func main() {
  fmt.Printf("Hello, World!\n")
}

% go run hello.go 
Hello, World!

compile

% go build hello.go
> hello is created

% ./hello
Hello World

cross compile

# get the list of available values

% go tool dist list 
aix/ppc64
android/386
android/amd64
...

# compile for windows/amd64
% GOOS=windows GOARCH=amd64 go build hello.go
> hello.exe is created

server

% cat server.go
package main

import (
  "fmt"
  "net/http"
)

func handler(w http.ResponseWriter, r *http.Request) {
  fmt.Fprintf(w, "Hello, World!")
}

func main() {
  http.HandleFunc("/", handler)
  http.ListenAndServe(":8080", nil)
}

% go run server.go

% curl http://localhost:8080/
Hello, World