(Objective-C) SNS Publish (Send Message)

Sends a message to all of a topic's subscribed endpoints.

See SNS Publish for more information.

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#import <CkoRest.h>
#import <CkoAuthAws.h>
#import <NSString.h>
#import <CkoXml.h>

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

CkoRest *rest = [[CkoRest alloc] init];

// Connect to the Amazon AWS REST server.
// such as https://sns.us-west-2.amazonaws.com/
BOOL bTls = YES;
int port = 443;
BOOL bAutoReconnect = YES;
BOOL success = [rest Connect: @"sns.us-west-2.amazonaws.com" port: [NSNumber numberWithInt: port] tls: bTls autoReconnect: bAutoReconnect];

// Provide AWS credentials for the REST call.
CkoAuthAws *authAws = [[CkoAuthAws alloc] init];
authAws.AccessKey = @"AWS_ACCESS_KEY";
authAws.SecretKey = @"AWS_SECRET_KEY";
// the region should match our URL above..
authAws.Region = @"us-west-2";
authAws.ServiceName = @"sns";

[rest SetAuthAws: authAws];

[rest AddQueryParam: @"Action" value: @"Publish"];
[rest AddQueryParam: @"TopicArn" value: @"arn:aws:sns:us-west-2:957491831129:chilkat"];
// For subscribed email addresses, this is the subject of the email.
[rest AddQueryParam: @"Subject" value: @"Test Message from Amazon SNS"];
[rest AddQueryParam: @"Message" value: @"This is a test message from Amazon SNS"];

NSString *responseXml = [rest FullRequestNoBody: @"GET" uriPath: @"/"];
if (rest.LastMethodSuccess != YES) {
    NSLog(@"%@",rest.LastErrorText);
    return;
}

// A successful response will have a status code equal to 200.
if ([rest.ResponseStatusCode intValue] != 200) {
    NSLog(@"%@%d",@"response status code = ",[rest.ResponseStatusCode intValue]);
    NSLog(@"%@%@",@"response status text = ",rest.ResponseStatusText);
    NSLog(@"%@%@",@"response header: ",rest.ResponseHeader);
    NSLog(@"%@%@",@"response body: ",responseXml);
    return;
}

// Examine the successful XML response.
CkoXml *xml = [[CkoXml alloc] init];
[xml LoadXml: responseXml];
NSLog(@"%@",[xml GetXml]);

// To get the MessageId
NSLog(@"%@%@",@"MessageId: ",[xml ChilkatPath: @"PublishResult|MessageId|*"]);

// A sample successful response:
// <?xml version="1.0" encoding="utf-8" ?>
// <PublishResponse xmlns="http://sns.amazonaws.com/doc/2010-03-31/">
//     <PublishResult>
//         <MessageId>5e135f2e-898d-5006-940a-0f43829c764b</MessageId>
//     </PublishResult>
//     <ResponseMetadata>
//         <RequestId>9adbf47d-9e07-5981-bb7f-a4609a167fcc</RequestId>
//     </ResponseMetadata>
// </PublishResponse>