Go - Build a web API - Bruce Lu's pages

Objective

Build a web API by using Go language on Linux

Setup Go

Download

wget https://dl.google.com/go/go1.12.4.linux-amd64.tar.gz tar -C /usr/local -xzf ./go1.12.4.linux-amd64.tar.gz
Configure PATH

Add Go to PATH in ~/.bash_profile
```
export PATH=$PATH:/usr/local/go/bin
```
Source
```
. ~/.bash_profile
```
Reference

Create a Go project

mkdir -p /opt/ws/go/src/blue/http
cd /opt/ws/go/src/blue/http
vim BlueHTTPServer.go

package main;

import (
  "net/http"
)

func say(res http.ResponseWriter, req *http.Request) {
  res.Write([]byte("Hey Bruce!"));
}

func main(){
  http.HandleFunc("/say", say);
  http.Handle("/say2", http.HandlerFunc(say));
  http.ListenAndServe(":10001", nil);
  select{};
}

Build and run

go build BlueHTTPServer.go
./BlueHTTPServer

Test

curl http://localhost:10001/say
curl http://localhost:10001/say2

# I can see output like this: Hey Bruce!