Objective-C

Docusign Refresh OAuth2 Access Token

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Demonstrates how to refresh a Docusign OAuth2 access token. The refresh does not require user interaction via a web browser. If an access token expires (typically with a 401 response code), a new access token can be automatically obtained by using the code in this example. 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.

//  It is assumed we previously obtained an OAuth2 access token.
//  This example loads the JSON access token file 
//  saved by this example: Get Docusign OAuth2 Access Token

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

//  The access token JSON looks like this:

//  {
//    "access_token": "eyJ0eXA....YQyig",
//    "token_type": "Bearer",
//    "refresh_token": "eyJ0eXA....auE3eHKg",
//    "expires_in": 28800
//  }

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

//  For the developer sandbox environment, the token endpoint is https://account-d.docusign.com/oauth/token
//  For the production platform, the token endpoint is https://account.docusign.com/oauth/token
oauth2.TokenEndpoint = @"https://account-d.docusign.com/oauth/token";

//  Replace these with actual values.
//  The client ID is also known as the "integration key" in Docusign.
oauth2.ClientId = @"MY_DOCUSIGN_CLIENT_ID";
//  This is your secret key for the authorization code grant.
oauth2.ClientSecret = @"MY_DOCUSIGN_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 != YES) {
    NSLog(@"%@",oauth2.LastErrorText);
    return;
}

NSLog(@"%@%@",@"New access token: ",oauth2.AccessToken);
NSLog(@"%@%@",@"New refresh token: ",oauth2.RefreshToken);

//  Update the JSON with the new tokens.
[jsonToken UpdateString: @"access_token" value: oauth2.AccessToken];
[jsonToken UpdateString: @"refresh_token" value: oauth2.RefreshToken];

//  Save the new JSON access token response to a file.
CkoStringBuilder *sbJson = [[CkoStringBuilder alloc] init];
jsonToken.EmitCompact = NO;
[jsonToken EmitSb: sbJson];
[sbJson WriteFile: @"qa_data/tokens/docusign.json" charset: @"utf-8" emitBom: NO];

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