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check.go
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check.go
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/**
* @license
* Copyright Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
// [START drive_quickstart]
package main
import (
"context"
"encoding/json"
"fmt"
"log"
"net/http"
"os"
"path/filepath"
"golang.org/x/oauth2"
"golang.org/x/oauth2/google"
"google.golang.org/api/drive/v3"
"google.golang.org/api/option"
)
// Retrieve a token, saves the token, then returns the generated client.
func getClient(config *oauth2.Config) *http.Client {
// The file token.json stores the user's access and refresh tokens, and is
// created automatically when the authorization flow completes for the first
// time.
tokFile := "token.json"
tok, err := tokenFromFile(tokFile)
if err != nil {
tok = getTokenFromWeb(config)
saveToken(tokFile, tok)
}
return config.Client(context.Background(), tok)
}
// Request a token from the web, then returns the retrieved token.
func getTokenFromWeb(config *oauth2.Config) *oauth2.Token {
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 {
log.Fatalf("Unable to read authorization code %v", err)
}
tok, err := config.Exchange(context.TODO(), authCode)
if err != nil {
log.Fatalf("Unable to retrieve token from web %v", err)
}
return tok
}
// Retrieves a token from a local file.
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
}
// Saves a token to a file path.
func saveToken(path string, token *oauth2.Token) {
fmt.Printf("Saving credential file to: %s\n", path)
f, err := os.OpenFile(path, 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(service *drive.Service, filePath string) error {
// Open the file.
file, err := os.Open(filePath)
if err != nil {
return fmt.Errorf("Failed to open file: %v", err)
}
defer file.Close()
// Create a Drive file.
driveFile := &drive.File{
Name: filepath.Base(filePath),
Parents: []string{"root"},
}
// Upload the file to Drive.
_, err = service.Files.Create(driveFile).Media(file).Do()
if err != nil {
return fmt.Errorf("Failed to upload file: %v", err)
}
fmt.Printf("File '%s' uploaded successfully to parent folder '%s'.\n", driveFile.Name, driveFile.Id)
return nil
}
func s() {
ctx := context.Background()
b, err := os.ReadFile("credentials.json")
if err != nil {
log.Fatalf("Unable to read client secret file: %v", err)
}
// If modifying these scopes, delete your previously saved token.json.
config, err := google.ConfigFromJSON(b, drive.DriveMetadataReadonlyScope, drive.DriveFileScope)
if err != nil {
log.Fatalf("Unable to parse client secret file to config: %v", err)
}
client := getClient(config)
srv, err := drive.NewService(ctx, option.WithHTTPClient(client))
if err != nil {
log.Fatalf("Unable to retrieve Drive client: %v", err)
}
err = uploadFile(srv, "./low.webp")
if err != nil {
log.Fatalf("Failed to upload file: %v", err)
}
r, err := srv.Files.List().PageSize(10).
Fields("nextPageToken, files(id, name)").Do()
if err != nil {
log.Fatalf("Unable to retrieve files: %v", err)
}
fmt.Println("Files:")
if len(r.Files) == 0 {
fmt.Println("No files found.")
} else {
for _, i := range r.Files {
fmt.Printf("%s (%s)\n", i.Name, i.Id)
}
}
}
// [END drive_quickstart]