launcher_json/application/main.go

package main

import (
	"fmt"
	"io"
	"log"
	"net/http"
	"os"

	"github.com/gin-gonic/gin"
	"github.com/joho/godotenv"
)

func main() {
	err := godotenv.Load()
	if err != nil {
		log.Println("Error loading .env file -- ignore if production")
	}
	r := gin.Default()
	r.GET("/", getLauncherJson)
	r.Run(fmt.Sprintf("0.0.0.0:%s", os.Getenv("PORT_LISTENING")))
}

func getLauncherJson(c *gin.Context) {
	res, err := http.Get(os.Getenv("JSON_LOCATION"))
	if err != nil {
		respondErrorToClient(c, "Error getting the json file")
		return
	}
	if res.StatusCode != http.StatusOK {
		respondErrorToClient(c, "Error getting the json file")
		return
	}
	body, err := io.ReadAll(res.Body)
	if err != nil {
		respondErrorToClient(c, "Error getting the json file")
		return
	}
	c.Data(http.StatusOK, "application/json", body)
}

func respondErrorToClient(c *gin.Context, msg string) {
	log.Println(msg)
	c.JSON(http.StatusInternalServerError, gin.H{
		"error": msg,
	})
}