Upload local copy of Modis tiles

gcp_modis_uploader.go

package main

import (
	"fmt"
	"io/ioutil"
	//"os"
	"path"

	"cloud.google.com/go/storage"
	"golang.org/x/net/context"
)

const localDir = "/Users/pablo/Desktop/modis/"
const bktName = "modisimple"

func WriteObject(bktName, objName string, contents []byte) error {
	ctx := context.Background()

	// Sets your Google Cloud Platform project ID.
	//projectID := "YOUR_PROJECT_ID"
	//projectID := "nci-gce"

	// Creates a client.
	client, err := storage.NewClient(ctx)
	if err != nil {
		return fmt.Errorf("Failed to create client: %v", err)
	}

	// Creates a Bucket instance.
	bucket := client.Bucket(bktName)
	w := bucket.Object(objName).NewWriter(ctx)
	w.ContentType = "application/octet-stream"

	if _, err := w.Write([]byte(contents)); err != nil {
		return fmt.Errorf("Failed to write object to bucket: %v", err)
	}

	if err := w.Close(); err != nil {
		return fmt.Errorf("Failed to close writer to bucket: %v", err)
	}
	// Close the client when finished.
	if err := client.Close(); err != nil {
		return fmt.Errorf("Failed to close client: %v", err)
	}

	return nil
}

func main() {

	files, err := ioutil.ReadDir(localDir)
    if err != nil {
        panic(err)
    }

    for _, f := range files {
    	fName := f.Name()
    	if fName[:4] == "MCD4" {

    		shortName := fName[:27] + fName[41:]
			fmt.Println(shortName)
			data, err := ioutil.ReadFile(path.Join(localDir, f.Name()))
			if err != nil {
        		panic(err)
    		}

    		err = WriteObject(bktName, shortName, data)
    		if err != nil {
        		panic(err)
    		}
    	}
    }
}