package main
import (
"context"
"flag"
"fmt"
"io"
"log"
"net/http"
"os"
"path/filepath"
"runtime"
"strings"
"google.golang.org/api/drive/v3"
"google.golang.org/api/option"
"golang.org/x/oauth2/google"
)
func getClient(configPath string) (*http.Client, error) {
b, err := ioutil.ReadFile(configPath)
if err != nil {
return nil, fmt.Errorf("error reading credentials file: %v", err)
}
config, err := google.ConfigFromJSON(b, drive.DriveFileScope)
if err != nil {
return nil, fmt.Errorf("error parsing credentials file: %v", err)
}
client, err := getClientFromWeb(config)
if err != nil {
return nil, fmt.Errorf("error creating client from web: %v", err)
}
return client, nil
}
func getClientFromWeb(config oauth2.Config) (http.Client, error) {
tokenFile := "token.json"
tok, err := tokenFromFile(tokenFile)
if err != nil {
tok, err = getTokenFromWeb(config)
if err != nil {
return nil, fmt.Errorf("unable to retrieve token from web: %v", err)
}
saveToken(tokenFile, tok)
}
return config.Client(context.Background(), tok), nil
}
func getTokenFromWeb(config oauth2.Config) (oauth2.Token, error) {
authURL := config.AuthCodeURL("state-token", oauth2.AccessTypeOffline)
fmt.Printf("Go to the following link in your browser, then type the "+
"authorization code: \n%v\n", authURL)
var authCode string
if _, err := fmt.Scan(&authCode); err != nil {
return nil, fmt.Errorf("unable to read authorization code: %v", err)
}
tok, err := config.Exchange(context.Background(), authCode)
if err != nil {
return nil, fmt.Errorf("unable to retrieve token from web: %v", err)
}
return tok, nil
}
func tokenFromFile(file string) (*oauth2.Token, error) {
f, err := os.Open(file)
if err != nil {
return nil, err
}
defer f.Close()
tok := &oauth2.Token{}
err = json.NewDecoder(f).Decode(tok)
return tok, err
}
func saveToken(file string, token *oauth2.Token) {
fmt.Printf("Saving credential file to: %s\n", file)
f, err := os.OpenFile(file, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0600)
if err != nil {
log.Fatalf("Unable to cache oauth token: %v", err)
}
defer f.Close()
json.NewEncoder(f).Encode(token)
}
func uploadFile(client *http.Client, filePath string, driveFolderID string) error {
service, err := drive.NewService(context.Background(), option.WithHTTPClient(client))
if err != nil {
return fmt.Errorf("error creating Drive service: %v", err)
}
file, err := os.Open(filePath)
if err != nil {
return fmt.Errorf("error opening file: %v", err)
}
defer file.Close()
driveFile := &drive.File{
Name: filepath.Base(filePath),
}
if driveFolderID != "" {
driveFile.Parents = []string{driveFolderID}
}
_, err = service.Files.Create(driveFile).Media(file).Do()
if err != nil {
return fmt.Errorf("error uploading file: %v", err)
}
return nil
}
func main() {
configPath := flag.String("config", "credentials.json", "Path to the client secret JSON file.")
filePath := flag.String("file", "", "Path to the file to upload.")
driveFolderID := flag.String("folder", "", "ID of the Google Drive folder to upload the file to.")
flag.Parse()
if *filePath == "" {
log.Fatal("File path is required. Use the -file flag to specify the file to upload.")
}
client, err := getClient(*configPath)
if err != nil {
log.Fatalf("Unable to get Drive client: %v", err)
}
err = uploadFile(client, filePath, driveFolderID)
if err != nil {
log.Fatalf("Error uploading file: %v", err)
}
fmt.Println("File uploaded successfully.")
}