Chilkat Online Tools

ListChannels 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: @"ListChannels"];

CkoStringBuilder *sbResponseBody = [[CkoStringBuilder alloc] init];
success = [rest FullRequestNoBodySb: @"GET" uriPath: @"/channels" 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 *channelName = 0;
NSString *Bucket = 0;
NSString *KeyPrefix = 0;
NSString *RoleArn = 0;
int creationTime;
int lastMessageArrivalTime;
int lastUpdateTime;
NSString *status = 0;

NSString *nextToken = [jResp StringOf: @"nextToken"];
int i = 0;
int count_i = [[jResp SizeOfArray: @"channelSummaries"] intValue];
while (i < count_i) {
    jResp.I = [NSNumber numberWithInt: i];
    channelName = [jResp StringOf: @"channelSummaries[i].channelName"];
    Bucket = [jResp StringOf: @"channelSummaries[i].channelStorage.customerManagedS3.bucket"];
    KeyPrefix = [jResp StringOf: @"channelSummaries[i].channelStorage.customerManagedS3.keyPrefix"];
    RoleArn = [jResp StringOf: @"channelSummaries[i].channelStorage.customerManagedS3.roleArn"];
    creationTime = [[jResp IntOf: @"channelSummaries[i].creationTime"] intValue];
    lastMessageArrivalTime = [[jResp IntOf: @"channelSummaries[i].lastMessageArrivalTime"] intValue];
    lastUpdateTime = [[jResp IntOf: @"channelSummaries[i].lastUpdateTime"] intValue];
    status = [jResp StringOf: @"channelSummaries[i].status"];
    i = i + 1;
}

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

// {
//   "channelSummaries": [
//     {
//       "channelName": "string",
//       "channelStorage": {
//         "customerManagedS3": {
//           "bucket": "string",
//           "keyPrefix": "string",
//           "roleArn": "string"
//         },
//         "serviceManagedS3": {}
//       },
//       "creationTime": number,
//       "lastMessageArrivalTime": number,
//       "lastUpdateTime": number,
//       "status": "string"
//     }
//   ],
//   "nextToken": "string"
// }