Objective-C

Refresh QuickBooks OAuth2 Access Token

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Demonstrates how to refresh a QuickBooks OAuth2 access token. Objective-C

#import <CkoJsonObject.h>
#import <CkoOAuth2.h>
#import <CkoStringBuilder.h>

BOOL success = NO;

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

//  See Get QuickBooks OAuth2 Access Token 
//  for sample code showing how to obtain a QuickBooks access token for desktop apps.

//  This example assumes we previously obtained an OAuth2 access token for QuickBooks.

CkoJsonObject *jsonToken = [[CkoJsonObject alloc] init];
success = [jsonToken LoadFile: @"qa_data/tokens/qb-access-token.json"];
if (success != YES) {
    NSLog(@"%@",@"Failed to load qb-access-token.json");
    return;
}

//  The access token JSON looks something like this:

//  {
//    "expires_in": 3600,
//    "x_refresh_token_expires_in": 8726400,
//    "refresh_token": "L011546037639r ... 3vR2DrbOmg0Sdagw",
//    "access_token": "eyJlbmMiOiJBMTI4Q0 ... oETJEMbeggg",
//    "token_type": "bearer"
//  }

CkoOAuth2 *oauth2 = [[CkoOAuth2 alloc] init];

oauth2.TokenEndpoint = @"https://oauth.platform.intuit.com/oauth2/v1/tokens/bearer";

//  Replace these with actual values.
oauth2.ClientId = @"QUICKBOOKS-CLIENT-ID";
oauth2.ClientSecret = @"QUICKBOOKS-CLIENT-SECRET";

//  Get the "refresh_token"
oauth2.RefreshToken = [jsonToken StringOf: @"refresh_token"];

//  Send the HTTP POST to refresh the access token..
success = [oauth2 RefreshAccessToken];
if (success == NO) {
    NSLog(@"%@",oauth2.LastErrorText);
    return;
}

//  The response contains a new access token, but we must keep
//  our existing refresh token for when we need to refresh again in the future.
[jsonToken UpdateString: @"access_token" value: oauth2.AccessToken];

//  Save the new JSON access token response to a file.
//  The access + refresh tokens contained in this JSON will be needed for the next refresh.
CkoStringBuilder *sbJson = [[CkoStringBuilder alloc] init];
jsonToken.EmitCompact = NO;

[jsonToken EmitSb: sbJson];
[sbJson WriteFile: @"qa_data/tokens/qb-access-token.json" charset: @"utf-8" emitBom: NO];

NSLog(@"%@",@"OAuth2 token refreshed!");
NSLog(@"%@%@",@"New Access Token = ",oauth2.AccessToken);