(Objective-C) OneDrive -- Download to File

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Note: This example requires Chilkat v9.5.0.97 or greater.

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#import <CkoJsonObject.h>
#import <CkoHttp.h>
#import <NSString.h>

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

// This example uses the OAuth client credentials flow.
// See How to Create an Azure App Registration for OAuth 2.0 Client Credentials

// Use your client ID, client secret, and tenant ID in the following lines
CkoJsonObject *json = [[CkoJsonObject alloc] init];
[json UpdateString: @"client_id" value: @"2871da2c-8176-4b7f-869b-2311aa82e743"];
[json UpdateString: @"client_secret" value: @"2hu9Q~r5QuryUcEkNbg1btLtnfU1VUXzhSCG6brH"];
[json UpdateString: @"scope" value: @"https://graph.microsoft.com/.default"];
[json UpdateString: @"token_endpoint" value: @"https://login.microsoftonline.com/114d7ed6-71bf-4dbe-a866-748364121bf2/oauth2/v2.0/token"];

CkoHttp *http = [[CkoHttp alloc] init];
http.AuthToken = [json Emit];

// Download the file.
[http SetUrlVar: @"user_id" value: @"4fe732c3-322e-4a6b-b729-2fd1eb5c6104"];
NSString *url = @"https://graph.microsoft.com/v1.0/users/{$user_id}/drive/root:/Pictures/three_penguins.jpg:/content";
NSString *localFilePath = @"c:/temp/qa_output/three_penguins.jpg";
BOOL success = [http Download: url saveToPath: localFilePath];
if (success != YES) {
    NSLog(@"%@",http.LastErrorText);
    return;
}

NSLog(@"%@",@"Successfully downloaded a OneDrive file to the local filesystem.");