Go Day 1

Should I start with “Hello World”?

Or we should get started with Installation?

I’ll go direct to something I want… :)

I want to build a webapp:

• A website is listening on port 8080 (can be any)
• Get current iptables information from localhost (Ubuntu)
• Output to frontend with JSON data
• Have inbound and outbound rule: GET and POST

So following points will be covered:

• Create a basic website instead of outputing “Hello world”, output JSON data
• Go: deal with different route as different functions in this WebApp
• Go: Run bash in golang
• Go: Get stdout from running bash
• Go: Create class (struct) in golang
• Go: Embedded types in golang
• Go: Create method in golang
• Go: Create interface in golang
• Go: String build in golang

I’ll see how long it will take me to cover all above… probably will be a while…

Day 1:

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package main

import (
   "encoding/json"
   "net/http"
)

func main() {
   http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
      mapD := map[string]string{"Name": "River", "Hello": "World"}

      json.NewEncoder(w).Encode(mapD)
   })

    http.ListenAndServe(":8080", nil)
}

Need to go… but simple code to get started, always good. ;)

R