(Objective-C) OneDrive -- Download Text File to Memory

Downloads a text file (such as XML, JSON, plain-text, HTML, etc.) into a StringBuilder object.

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

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#import <CkoJsonObject.h>
#import <CkoHttp.h>
#import <CkoStringBuilder.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];

// Sends the following GET request:
// GET https://graph.microsoft.com/v1.0/users/{$user_id}/drive/root:/{item-path}:/content

// Make sure to automatically follow redirects
http.FollowRedirects = YES;

// This example will download /Misc/hamlet.xml
[http SetUrlVar: @"item_path" value: @"Misc/hamlet.xml"];
[http SetUrlVar: @"user_id" value: @"4fe732c3-322e-4a6b-b729-2fd1eb5c6104"];

CkoStringBuilder *sbXml = [[CkoStringBuilder alloc] init];
NSString *expectedCharset = @"utf-8";
NSString *url = @"https://graph.microsoft.com/v1.0/users/{$user_id}/drive/root:/{$item_path}:/content";
BOOL success = [http DownloadSb: url charset: expectedCharset sb: sbXml];
if (http.LastMethodSuccess != YES) {
    NSLog(@"%@",http.LastErrorText);
    return;
}

// If the response status code was not 200, then it failed.
if ([http.LastStatus intValue] != 200) {
    NSLog(@"%@%d",@"Response Status Code = ",[http.LastStatus intValue]);
    NSLog(@"%@",@"Failed.");
    return;
}

// If we got here, then the file was successfully downloaded.
NSLog(@"%@",@"Download from OneDrive successful.");
NSLog(@"%@",@"The file is contained in sbXml.");