package main
import (
"fmt"
"log"
"net/http"
"os"
)
var (
version string
subtitle string
color string
)
const htmlContent = `<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Deployment Demonstration</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<style>
HTML{height:100%%;}
BODY{font-family:Helvetica,Arial;display:flex;display:-webkit-flex;align-items:center;justify-content:center;-webkit-align-items:center;-webkit-box-align:center;-webkit-justify-content:center;height:100%%;}
.box{background:%[3]s;color:white;text-align:center;border-radius:10px;display:inline-block;}
H1{font-size:10em;line-height:1.5em;margin:0 0.5em;}
H2{margin-top:0;}
</style>
</head>
<body>
<div class="box"><h1>%[1]s</h1><h2>%[2]s</h2></div>
</body>
</html>`
func deploymentHandler(w http.ResponseWriter, r *http.Request) {
fmt.Fprintf(w, htmlContent, version, subtitle, color)
}
func healthHandler(w http.ResponseWriter, r *http.Request) {
fmt.Fprintln(w, "ok")
}
func main() {
version = "v1"
if len(os.Args) > 1 {
version = os.Args[1]
}
subtitle = os.Getenv("SUBTITLE")
color = os.Getenv("COLOR")
if len(color) == 0 {
color = "#303030"
}
http.HandleFunc("/", deploymentHandler)
http.HandleFunc("/_healthz", healthHandler)
log.Printf("Listening on :8080 at %s ...", version)
log.Fatal(http.ListenAndServe(":8080", nil))
}