wit-utils/cf-r2/download.go

package main

import (
	"context"
	"fmt"
	"log"

	"github.com/minio/minio-go/v7"
	"github.com/minio/minio-go/v7/pkg/credentials"
)

const (
	r2Endpoint   = "<account-id>.r2.cloudflarestorage.com" // Replace with your R2 endpoint
	r2AccessKey  = "<your-access-key>"                     // Replace with your Access Key
	r2SecretKey  = "<your-secret-key>"                     // Replace with your Secret Key
	r2BucketName = "example-bucket"                        // Replace with your bucket name
)

func main() {
	// Initialize MinIO client for Cloudflare R2
	client, err := minio.New(r2Endpoint, &minio.Options{
		Creds:  credentials.NewStaticV4(r2AccessKey, r2SecretKey, ""),
		Secure: true, // Use HTTPS
	})
	if err != nil {
		log.Fatalf("Failed to initialize client: %v", err)
	}

	// Upload a file
	err = uploadFile(client, "example.txt", "example.txt")
	if err != nil {
		log.Fatalf("Upload failed: %v", err)
	}

	// Download the file
	err = downloadFile(client, "example.txt", "downloaded-example.txt")
	if err != nil {
		log.Fatalf("Download failed: %v", err)
	}
}

// UploadFile uploads a file to the R2 bucket
func uploadFile(client *minio.Client, objectName, filePath string) error {
	ctx := context.Background()
	_, err := client.FPutObject(ctx, r2BucketName, objectName, filePath, minio.PutObjectOptions{
		ContentType: "application/octet-stream", // Adjust MIME type if needed
	})
	if err != nil {
		return fmt.Errorf("failed to upload file: %w", err)
	}

	fmt.Printf("Successfully uploaded %s as %s\n", filePath, objectName)
	return nil
}

// DownloadFile downloads a file from the R2 bucket
func downloadFile(client *minio.Client, objectName, destPath string) error {
	ctx := context.Background()
	err := client.FGetObject(ctx, r2BucketName, objectName, destPath, minio.GetObjectOptions{})
	if err != nil {
		return fmt.Errorf("failed to download file: %w", err)
	}

	fmt.Printf("Successfully downloaded %s to %s\n", objectName, destPath)
	return nil
}