Chilkat Online Tools

DescribeChannel Objective-C Example

AWS IoT Analytics

#import <CkoRest.h>
#import <CkoAuthAws.h>
#import <CkoStringBuilder.h>
#import <CkoJsonObject.h>
#import <NSString.h>

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

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

CkoAuthAws *authAws = [[CkoAuthAws alloc] init];
authAws.AccessKey = @"AWS_ACCESS_KEY";
authAws.SecretKey = @"AWS_SECRET_KEY";

// Don't forget to change the region to your particular region. (Also make the same change in the call to Connect below.)
authAws.Region = @"us-west-2";
authAws.ServiceName = @"iotanalytics";
// SetAuthAws causes Chilkat to automatically add the following headers: Authorization, X-Amz-Date
[rest SetAuthAws: authAws];

// URL: https://iotanalytics.us-west-2.amazonaws.com/
// Use the same region as specified above.
success = [rest Connect: @"iotanalytics.us-west-2.amazonaws.com" port: [NSNumber numberWithInt: 443] tls: YES autoReconnect: YES];
if (success != YES) {
    NSLog(@"%@%d",@"ConnectFailReason: ",[rest.ConnectFailReason intValue]);
    NSLog(@"%@",rest.LastErrorText);
    return;
}

[rest AddHeader: @"Content-Type" value: @"application/x-amz-json-1.1"];
[rest AddHeader: @"X-Amz-Target" value: @"DescribeChannel"];

CkoStringBuilder *sbResponseBody = [[CkoStringBuilder alloc] init];
success = [rest FullRequestNoBodySb: @"GET" uriPath: @"/channels/{channelName}" sb: sbResponseBody];
if (success != YES) {
    NSLog(@"%@",rest.LastErrorText);
    return;
}

int respStatusCode = [rest.ResponseStatusCode intValue];
NSLog(@"%@%d",@"response status code = ",respStatusCode);
if (respStatusCode != 200) {
    NSLog(@"%@",@"Response Header:");
    NSLog(@"%@",rest.ResponseHeader);
    NSLog(@"%@",@"Response Body:");
    NSLog(@"%@",[sbResponseBody GetAsString]);
    return;
}

CkoJsonObject *jResp = [[CkoJsonObject alloc] init];
[jResp LoadSb: sbResponseBody];

// The following code parses the JSON response.
// A sample JSON response is shown below the sample code.

// Use this online tool to generate parsing code from sample JSON:
// Generate Parsing Code from JSON

NSString *Arn = [jResp StringOf: @"channel.arn"];
int CreationTime = [[jResp IntOf: @"channel.creationTime"] intValue];
int LastMessageArrivalTime = [[jResp IntOf: @"channel.lastMessageArrivalTime"] intValue];
int LastUpdateTime = [[jResp IntOf: @"channel.lastUpdateTime"] intValue];
NSString *Name = [jResp StringOf: @"channel.name"];
int NumberOfDays = [[jResp IntOf: @"channel.retentionPeriod.numberOfDays"] intValue];
int Unlimited = [[jResp IntOf: @"channel.retentionPeriod.unlimited"] intValue];
NSString *Status = [jResp StringOf: @"channel.status"];
NSString *Bucket = [jResp StringOf: @"channel.storage.customerManagedS3.bucket"];
NSString *KeyPrefix = [jResp StringOf: @"channel.storage.customerManagedS3.keyPrefix"];
NSString *RoleArn = [jResp StringOf: @"channel.storage.customerManagedS3.roleArn"];
int EstimatedOn = [[jResp IntOf: @"statistics.size.estimatedOn"] intValue];
int EstimatedSizeInBytes = [[jResp IntOf: @"statistics.size.estimatedSizeInBytes"] intValue];

// A sample JSON response body parsed by the above code:

// {
//   "channel": {
//     "arn": "string",
//     "creationTime": number,
//     "lastMessageArrivalTime": number,
//     "lastUpdateTime": number,
//     "name": "string",
//     "retentionPeriod": {
//       "numberOfDays": number,
//       "unlimited": boolean
//     },
//     "status": "string",
//     "storage": {
//       "customerManagedS3": {
//         "bucket": "string",
//         "keyPrefix": "string",
//         "roleArn": "string"
//       },
//       "serviceManagedS3": {}
//     }
//   },
//   "statistics": {
//     "size": {
//       "estimatedOn": number,
//       "estimatedSizeInBytes": number
//     }
//   }
// }