Google Drive API IOS Permissions of GTLRDriveService - objective-c

Question

I am playing around with the google drive API and trying to build a simple app that uploads a picture to my google drive. The app is supposed to upload a picture once the user is signed in, however it gives an error of
"2017-09-14 00:55:20.342237-0400 driveTest[6705:1647551] An error
occurred: Error Domain=com.google.GTLRErrorObjectDomain Code=403
"Insufficient Permission"
UserInfo={GTLRStructuredError=GTLRErrorObject 0x1c4251d30:
{message:"Insufficient Permission" errors:[1] code:403},
NSLocalizedDescription=Insufficient Permission}"
I have tried to pass it the service which is of type GTLRDriveService to the initSetup() function of the userSetUp class, but to no avail. Could someone please point me to the right track as to why my permissions are not working even though I have logged on correctly, and the part where I am passing in the GTLRDriveService is in the code that runs after a sucessful login.
I instantiate a userSetUp object and I
let setUpUser = userSetUp()
setUpUser.initSetup(service)
I have userSetUp written in objective c as such and it is bridged correctly as I am able to instantiate it in my viewcontroller file which is written in swift.
UserSetUp:::::::
#import "userSetUp.h"
#import <GoogleSignIn/GoogleSignIn.h>
#import GoogleAPIClientForREST;
#implementation userSetUp
- (void) initSetup:(GTLRDriveService *) driveService {
printf("heloooooaiosuoiadoidauoalo");
//GTLRDriveService *driveService = [GTLRDriveService new];
//NSData *fileData = [[NSFileManager defaultManager] contentsAtPath:#"files/apple.jpg"];
NSString *filePath = [[NSBundle mainBundle] pathForResource:#"apple" ofType:#"jpg"];
NSData *fileData = [NSData dataWithContentsOfFile:filePath];
GTLRDrive_File *metadata = [GTLRDrive_File object];
metadata.name = #"apple.jpg";
//metadata.mimeType = #"application/vnd.google-apps.document";
GTLRUploadParameters *uploadParameters = [GTLRUploadParameters uploadParametersWithData:fileData
MIMEType:#"image/jpeg"];
uploadParameters.shouldUploadWithSingleRequest = TRUE;
GTLRDriveQuery_FilesCreate *query = [GTLRDriveQuery_FilesCreate queryWithObject:metadata
uploadParameters:uploadParameters];
query.fields = #"id";
[driveService executeQuery:query completionHandler:^(GTLRServiceTicket *ticket,
GTLRDrive_File *file,
NSError *error) {
if (error == nil) {
//NSLog(#"File ID %#", file.identifier);
printf("it worked");
} else {
NSLog(#"An error occurred: %#", error);
}
}];
printf("upload complete!");
}
#end
And Viewcontroller. swift
import GoogleAPIClientForREST
import GoogleSignIn
import UIKit
class ViewController: UIViewController, GIDSignInDelegate, GIDSignInUIDelegate {
// If modifying these scopes, delete your previously saved credentials by
// resetting the iOS simulator or uninstall the app.
private let scopes = [kGTLRAuthScopeDriveReadonly]
let service = GTLRDriveService()
let signInButton = GIDSignInButton()
let output = UITextView()
override func viewDidLoad() {
super.viewDidLoad()
// Configure Google Sign-in.
GIDSignIn.sharedInstance().delegate = self
GIDSignIn.sharedInstance().uiDelegate = self
GIDSignIn.sharedInstance().scopes = scopes
GIDSignIn.sharedInstance().signInSilently()
signInButton.frame = CGRect(x: view.frame.width/2 - signInButton.frame.width , y: view.frame.height/2, width: signInButton.frame.width, height: signInButton.frame.height)
// Add the sign-in button.
view.addSubview(signInButton)
// Add a UITextView to display output.
output.frame = view.bounds
output.isEditable = false
output.contentInset = UIEdgeInsets(top: 20, left: 0, bottom: 20, right: 0)
output.autoresizingMask = [.flexibleHeight, .flexibleWidth]
output.isHidden = true
view.addSubview(output);
//let itsASetup()
}
func sign(_ signIn: GIDSignIn!, didSignInFor user: GIDGoogleUser!,
withError error: Error!) {
if let error = error {
showAlert(title: "Authentication Error", message: error.localizedDescription)
self.service.authorizer = nil
} else {
self.signInButton.isHidden = true
self.output.isHidden = false
self.service.authorizer = user.authentication.fetcherAuthorizer()
listFiles()
}
}
// List up to 10 files in Drive
func listFiles() {
let query = GTLRDriveQuery_FilesList.query()
query.pageSize = 10
service.executeQuery(query,
delegate: self,
didFinish: #selector(displayResultWithTicket(ticket:finishedWithObject:error:))
)
}
// Process the response and display output
#objc func displayResultWithTicket(ticket: GTLRServiceTicket,
finishedWithObject result : GTLRDrive_FileList,
error : NSError?) {
if let error = error {
showAlert(title: "Error", message: error.localizedDescription)
return
}
var text = "";
if let files = result.files, !files.isEmpty {
text += "Files:\n"
for file in files {
text += "\(file.name!) (\(file.identifier!))\n"
}
} else {
text += "No files found."
}
output.text = text
let setUpUser = userSetUp()
setUpUser.initSetup(service)
}
// Helper for showing an alert
func showAlert(title : String, message: String) {
let alert = UIAlertController(
title: title,
message: message,
preferredStyle: UIAlertControllerStyle.alert
)
let ok = UIAlertAction(
title: "OK",
style: UIAlertActionStyle.default,
handler: nil
)
alert.addAction(ok)
present(alert, animated: true, completion: nil)
}
}

Answer 1

try to Change your scope like:
class ViewController: UIViewController, GIDSignInDelegate, GIDSignInUIDelegate
{
// If modifying these scopes, delete your previously saved credentials by
private let scopes = ["https://www.googleapis.com/auth/drive"]
...
}