iolalla/env.go

## env.go
package main

/**
 * I needed to view env variables in Appengine Standard. Why? Because I needed to know
 * so I thought I could add an environment variable and I could track the value of this env variable and I could track
 * what other env vars the code was receiving.
 *
 * So I decided to make a simple function that gets all the env vars and send them as HTML as a a response to the URL
 * call
 * Author: iolalla@gmail.com
 */

import (
    "bytes"
    "log"
    "net/http"
    "html/template"
    "os"

)

const HTML = `
<!DOCTYPE html>
<html>
<head><title>Environment Variables</title></head>
<body>
{{range $v := .}} <br> {{.}}</br>
{{end}}
</body>
</html>
`

func system(w http.ResponseWriter, r *http.Request) {
    var tpl bytes.Buffer
    templatito := template.Must(template.New("createTmpl").Parse(HTML))
    err := templatito.Execute(&tpl, os.Environ())
    if err != nil {
        log.Print(err)
    }

    w.Header().Set("Content-Type", " text/html; charset=UTF-8")
    w.WriteHeader(http.StatusOK)
    result := tpl.String()
    w.Write([]byte(result))
}


func main() {

    http.HandleFunc("/system", system)

    port := os.Getenv("PORT")
    if port == "" {
        port = "8080"
        log.Printf("Defaulting to port %s", port)

    }

    log.Printf("Listening on port %s", port)
    if err := http.ListenAndServe(":"+port, nil); err != nil {
        log.Print(err)
    }
}
	package main

	/**
	* I needed to view env variables in Appengine Standard. Why? Because I needed to know
	* so I thought I could add an environment variable and I could track the value of this env variable and I could track
	* what other env vars the code was receiving.
	*
	* So I decided to make a simple function that gets all the env vars and send them as HTML as a a response to the URL
	* call
	* Author: iolalla@gmail.com
	*/

	import (
	"bytes"
	"log"
	"net/http"
	"html/template"
	"os"

	)

	const HTML = `
	<!DOCTYPE html>
	<html>
	<head><title>Environment Variables</title></head>
	<body>
	{{range $v := .}} <br> {{.}}</br>
	{{end}}
	</body>
	</html>
	`

	func system(w http.ResponseWriter, r *http.Request) {
	var tpl bytes.Buffer
	templatito := template.Must(template.New("createTmpl").Parse(HTML))
	err := templatito.Execute(&tpl, os.Environ())
	if err != nil {
	log.Print(err)
	}

	w.Header().Set("Content-Type", " text/html; charset=UTF-8")
	w.WriteHeader(http.StatusOK)
	result := tpl.String()
	w.Write([]byte(result))
	}


	func main() {

	http.HandleFunc("/system", system)

	port := os.Getenv("PORT")
	if port == "" {
	port = "8080"
	log.Printf("Defaulting to port %s", port)

	}

	log.Printf("Listening on port %s", port)
	if err := http.ListenAndServe(":"+port, nil); err != nil {
	log.Print(err)
	}
	}