(Objective-C) AzureWebsites OAuth2 Password Flow

Demonstrates how to do OAuth 2.0 password flow for azurewebsites.net.

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#import <CkoHttp.h>
#import <CkoHttpRequest.h>
#import <NSString.h>
#import <CkoHttpResponse.h>
#import <CkoStringBuilder.h>
#import <CkoJsonObject.h>

// This example requires 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.HttpVerb = @"POST";
req.Path = @"/token";
req.ContentType = @"application/x-www-form-urlencoded";
[req AddParam: @"grant_type" value: @"password"];
[req AddParam: @"username" value: @"your_username"];
[req AddParam: @"password" value: @"your_password"];

NSString *tokenEndpoint = @"https://your_api.azurewebsites.net/token";
CkoHttpResponse *resp = [http PostUrlEncoded: tokenEndpoint 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]);

// Sample JSON response:

// {
//   "access_token": "NQGHn ... xTS",
//   "token_type": "bearer",
//   "expires_in": 1209599,
//   "userName": "your_username",
//   ".issued": "Mon, 27 Apr 2020 23:49:35 GMT",
//   ".expires": "Mon, 11 May 2020 23:49:35 GMT"
// }

int respStatusCode = [resp.StatusCode intValue];
NSLog(@"%@%d",@"Response Status Code = ",respStatusCode);
if (respStatusCode >= 400) {
    NSLog(@"%@",@"Response Header:");
    NSLog(@"%@",resp.Header);
    NSLog(@"%@",@"Failed.");

    return;
}

// ----------------------------------
// Use the OAuth2 token in a request.
// For example...

CkoStringBuilder *sbXml = [[CkoStringBuilder alloc] init];
success = [sbXml LoadFile: @"c:/someDir/someXmlFile.xml" charset: @"utf-8"];
if (success == NO) {
    NSLog(@"%@",@"Failed to load the XML file.");
    return;
}

// Get the OAuth2 token and use it for authentication
http.AuthToken = [jResp StringOf: @"token"];

NSString *destUrl = @"https://your_api.azurewebsites.net/destinationUrl";
resp = [http PostXml: destUrl xmlDoc: [sbXml GetAsString] charset: @"utf-8"];
if (http.LastMethodSuccess == NO) {
    NSLog(@"%@",http.LastErrorText);
    return;
}

respStatusCode = [resp.StatusCode intValue];
NSLog(@"%@%d",@"Response Status Code = ",respStatusCode);
if (respStatusCode >= 400) {
    NSLog(@"%@",@"Response Header:");
    NSLog(@"%@",resp.Header);
    NSLog(@"%@",@"Failed.");

    return;
}

// Examine the response body
NSLog(@"%@",resp.BodyStr);