catchy-cat/main.go

package main

import (
	"fmt"
	"io/ioutil"
	"os"
	"log"
	"github.com/gofiber/fiber/v2"
)

var DestinationPath string

func main() {
	log.Println("Starting Catchy Cat")
	DestinationPath = os.Getenv("DESTINATION_PATH")
	if DestinationPath == "" {
		DestinationPath = "./"
	}
	log.Println("DestinationPath:", DestinationPath)

	log.Println("Starting Fiber...")
	app := fiber.New()

	app.Get("/", func(c *fiber.Ctx) error {
		return c.SendString("Catchy-Cat, Listening!")
	})

	app.Post("/", HandlePostRequest)
	port := os.Getenv("PORT")

	app.Listen(fmt.Sprintf(":%s", port))
}

func HandlePostRequest(c *fiber.Ctx) error {
	file, err := c.FormFile("file")
	if err != nil {
		return c.Status(fiber.StatusBadRequest).SendString("File Not found in file arg")
	}
	buffer, err := file.Open()
	form, err:=c.MultipartForm()
	log.Printf("%d files present in the multipart form", len(form.File))
	if err != nil {
		return c.Status(fiber.StatusBadRequest).SendString("Could not open file")
	}

	defer buffer.Close()

	f, err := os.Create(fmt.Sprintf("%s/%s", DestinationPath, file.Filename))
	if err != nil {
		return c.Status(fiber.StatusBadRequest).SendString("Could not Create file")
	}

	data, err := ioutil.ReadAll(buffer)

	if err != nil {
		return c.Status(fiber.StatusBadRequest).SendString("Failed reading buffer")
	}

	_, err = f.Write(data)

	if err != nil {
		return c.Status(fiber.StatusBadRequest).SendString("Failed writing file")
	}

	return c.SendString("Catchy-Cat, File Caught!")
}