Objective-C / ForgeRock Identity Cloud Collection / Step 3: Exchange the Authorization Code for an Access Token
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#import <CkoHttp.h>
#import <CkoHttpRequest.h>
#import <CkoJsonObject.h>
#import <CkoHttpResponse.h>
#import <CkoStringBuilder.h>
#import <NSString.h>
// This example assumes the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.
CkoHttp *http = [[CkoHttp alloc] init];
BOOL success;
CkoHttpRequest *req = [[CkoHttpRequest alloc] init];
[req AddParam: @"grant_type" value: @"authorization_code"];
CkoJsonObject *jsonParam2 = [[CkoJsonObject alloc] init];
[req AddParam: @"code" value: [jsonParam2 Emit]];
CkoJsonObject *jsonParam3 = [[CkoJsonObject alloc] init];
[req AddParam: @"client_id" value: [jsonParam3 Emit]];
CkoJsonObject *jsonParam4 = [[CkoJsonObject alloc] init];
[req AddParam: @"client_secret" value: [jsonParam4 Emit]];
CkoJsonObject *jsonParam5 = [[CkoJsonObject alloc] init];
[req AddParam: @"redirect_uri" value: [jsonParam5 Emit]];
CkoJsonObject *jsonParam6 = [[CkoJsonObject alloc] init];
[req AddParam: @"code_verifier" value: [jsonParam6 Emit]];
[req AddHeader: @"Authorization" value: @"Bearer <access_token>"];
CkoHttpResponse *resp = [http PostUrlEncoded: @"https://<tenant-name>.forgeblocks.com/am/oauth2/realms/root/realms/alpha/access_token" req: req];
if (http.LastMethodSuccess == NO) {
NSLog(@"%@",http.LastErrorText);
return;
}
CkoStringBuilder *sbResponseBody = [[CkoStringBuilder alloc] init];
[resp GetBodySb: sbResponseBody];
CkoJsonObject *jResp = [[CkoJsonObject alloc] init];
[jResp LoadSb: sbResponseBody];
jResp.EmitCompact = NO;
NSLog(@"%@",@"Response Body:");
NSLog(@"%@",[jResp Emit]);
int respStatusCode = [resp.StatusCode intValue];
NSLog(@"%@%d",@"Response Status Code = ",respStatusCode);
if (respStatusCode >= 400) {
NSLog(@"%@",@"Response Header:");
NSLog(@"%@",resp.Header);
NSLog(@"%@",@"Failed.");
return;
}
// Sample JSON response:
// (Sample code for parsing the JSON response is shown below)
// {
// "access_token": "eyJ0eXAiJ9.eyJzdWIiOiJkZPXXcM",
// "refresh_token": "eyJ0eXAiOiJKV1QiLC.eyl0VHJXpdhFiWDw",
// "scope": "share",
// "token_type": "Bearer",
// "expires_in": 3599
// }
// Sample code for parsing the JSON response...
// Use this online tool to generate parsing code from sample JSON: Generate JSON Parsing Code
NSString *access_token = [jResp StringOf: @"access_token"];
NSString *refresh_token = [jResp StringOf: @"refresh_token"];
NSString *scope = [jResp StringOf: @"scope"];
NSString *token_type = [jResp StringOf: @"token_type"];
int expires_in = [[jResp IntOf: @"expires_in"] intValue];
Curl Command
curl -X POST
-H "Authorization: Bearer <access_token>"
-H "Content-Type: application/x-www-form-urlencoded"
--data-urlencode 'grant_type=authorization_code'
--data-urlencode 'code={{authorization_code}}'
--data-urlencode 'client_id={{postmanConfidentialClientId}}'
--data-urlencode 'client_secret={{postmanClientSecret}}'
--data-urlencode 'redirect_uri={{redirect_uri}}'
--data-urlencode 'code_verifier={{code_verifier}}'
https://<tenant-name>.forgeblocks.com/am/oauth2/realms/root/realms/alpha/access_token
Postman Collection Item JSON
{
"name": "Step 3: Exchange the Authorization Code for an Access Token",
"event": [
{
"listen": "prerequest",
"script": {
"exec": [
""
],
"type": "text/javascript"
}
},
{
"listen": "test",
"script": {
"exec": [
"var jsonData = JSON.parse(responseBody);",
"",
"if(jsonData.access_token && jsonData.access_token != \"\")",
"{",
" pm.globals.set(\"access_token\", jsonData.access_token);",
"}",
"",
"if(jsonData.refresh_token && jsonData.refresh_token != \"\")",
"{",
" pm.globals.set(\"refresh_token\", jsonData.refresh_token);",
"}",
"",
"// Tests",
"",
"pm.test(\"Status code is 200\", () => {",
" pm.expect(pm.response.code).to.eql(200);",
"});",
"",
"pm.test(\"Response contains access_token\", function () {",
" pm.expect(jsonData.access_token).to.be.a(\"string\");",
"});",
"",
""
],
"type": "text/javascript"
}
}
],
"request": {
"method": "POST",
"header": [
{
"key": "Content-Type",
"name": "Content-Type",
"value": "application/x-www-form-urlencoded",
"type": "text"
}
],
"body": {
"mode": "urlencoded",
"urlencoded": [
{
"key": "grant_type",
"value": "authorization_code",
"description": "The grant type required for the Authorization Code with PKCE grant.",
"type": "text"
},
{
"key": "code",
"value": "{{authorization_code}}",
"description": "The authentication code from the previous step.",
"type": "text"
},
{
"key": "client_id",
"value": "{{postmanConfidentialClientId}}",
"description": "The ID of the Confidential OAuth Client.",
"type": "text"
},
{
"key": "client_secret",
"value": "{{postmanClientSecret}}",
"description": "The secret of the Confidential OAuth Client. See the ForgeRock documentation for stronger methods of client authentication.",
"type": "text"
},
{
"key": "redirect_uri",
"value": "{{redirect_uri}}",
"description": "The complete URI to which client redirects the user if the request is successful.",
"type": "text"
},
{
"key": "code_verifier",
"value": "{{code_verifier}}",
"description": "The generated code verifier. See the \"Pre-request Script\" tab of \"Step 2\" for details.",
"type": "text"
}
]
},
"url": {
"raw": "{{amUrl}}/oauth2{{realm}}/access_token",
"host": [
"{{amUrl}}"
],
"path": [
"oauth2{{realm}}",
"access_token"
]
},
"description": "Authenticate with the authorization server using the details of the confidential client and the authorization code recieved in the previous call.\n"
},
"response": [
{
"name": "Example",
"originalRequest": {
"method": "POST",
"header": [
{
"key": "Content-Type",
"name": "Content-Type",
"value": "application/x-www-form-urlencoded",
"type": "text"
}
],
"body": {
"mode": "urlencoded",
"urlencoded": [
{
"key": "grant_type",
"value": "authorization_code",
"description": "The grant type required for the Authorization Code with PKCE grant.",
"type": "text"
},
{
"key": "code",
"value": "{{authorization_code}}",
"description": "The authentication code from the previous step.",
"type": "text"
},
{
"key": "client_id",
"value": "{{postmanConfidentialClientId}}",
"description": "The ID of the Confidential OAuth Client.",
"type": "text"
},
{
"key": "client_secret",
"value": "{{postmanClientSecret}}",
"description": "The secret of the Confidential OAuth Client. See the ForgeRock documentation for stronger methods of client authentication.",
"type": "text"
},
{
"key": "redirect_uri",
"value": "{{redirect_uri}}",
"description": "The complete URI to which client redirects the user if the request is successful.",
"type": "text"
},
{
"key": "code_verifier",
"value": "{{code_verifier}}",
"description": "The generated code verifier.",
"type": "text"
}
]
},
"url": {
"raw": "{{amUrl}}/oauth2{{realm}}/access_token",
"host": [
"{{amUrl}}"
],
"path": [
"oauth2{{realm}}",
"access_token"
]
}
},
"status": "OK",
"code": 200,
"_postman_previewlanguage": "json",
"header": [
{
"key": "X-Frame-Options",
"value": "SAMEORIGIN"
},
{
"key": "X-Content-Type-Options",
"value": "nosniff"
},
{
"key": "Cache-Control",
"value": "no-store"
},
{
"key": "Pragma",
"value": "no-cache"
},
{
"key": "Content-Type",
"value": "application/json;charset=UTF-8"
},
{
"key": "Content-Length",
"value": "1644"
},
{
"key": "Date",
"value": "Thu, 13 Aug 2020 12:14:20 GMT"
}
],
"cookie": [
],
"body": "{\n \"access_token\": \"eyJ0eXAiJ9.eyJzdWIiOiJkZPXXcM\",\n \"refresh_token\": \"eyJ0eXAiOiJKV1QiLC.eyl0VHJXpdhFiWDw\",\n \"scope\": \"share\",\n \"token_type\": \"Bearer\",\n \"expires_in\": 3599\n}"
}
]
}
