Chilkat Online Tools

DescribeChannel unicodeCpp Example

AWS IoT Analytics

#include <CkRestW.h>
#include <CkAuthAwsW.h>
#include <CkStringBuilderW.h>
#include <CkJsonObjectW.h>

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

    CkRestW rest;
    bool success;

    CkAuthAwsW authAws;
    authAws.put_AccessKey(L"AWS_ACCESS_KEY");
    authAws.put_SecretKey(L"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.put_Region(L"us-west-2");
    authAws.put_ServiceName(L"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(L"iotanalytics.us-west-2.amazonaws.com",443,true,true);
    if (success != true) {
        wprintf(L"ConnectFailReason: %d\n",rest.get_ConnectFailReason());
        wprintf(L"%s\n",rest.lastErrorText());
        return;
    }

    rest.AddHeader(L"Content-Type",L"application/x-amz-json-1.1");
    rest.AddHeader(L"X-Amz-Target",L"DescribeChannel");

    CkStringBuilderW sbResponseBody;
    success = rest.FullRequestNoBodySb(L"GET",L"/channels/{channelName}",sbResponseBody);
    if (success != true) {
        wprintf(L"%s\n",rest.lastErrorText());
        return;
    }

    int respStatusCode = rest.get_ResponseStatusCode();
    wprintf(L"response status code = %d\n",respStatusCode);
    if (respStatusCode != 200) {
        wprintf(L"Response Header:\n");
        wprintf(L"%s\n",rest.responseHeader());
        wprintf(L"Response Body:\n");
        wprintf(L"%s\n",sbResponseBody.getAsString());
        return;
    }

    CkJsonObjectW jResp;
    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

    // Chilkat functions returning "const char *" return a pointer to temporary internal memory owned and managed by Chilkat.
    // See this example explaining how this memory should be used: const char * functions.

    const wchar_t *Arn = jResp.stringOf(L"channel.arn");
    int CreationTime = jResp.IntOf(L"channel.creationTime");
    int LastMessageArrivalTime = jResp.IntOf(L"channel.lastMessageArrivalTime");
    int LastUpdateTime = jResp.IntOf(L"channel.lastUpdateTime");
    const wchar_t *Name = jResp.stringOf(L"channel.name");
    int NumberOfDays = jResp.IntOf(L"channel.retentionPeriod.numberOfDays");
    int Unlimited = jResp.IntOf(L"channel.retentionPeriod.unlimited");
    const wchar_t *Status = jResp.stringOf(L"channel.status");
    const wchar_t *Bucket = jResp.stringOf(L"channel.storage.customerManagedS3.bucket");
    const wchar_t *KeyPrefix = jResp.stringOf(L"channel.storage.customerManagedS3.keyPrefix");
    const wchar_t *RoleArn = jResp.stringOf(L"channel.storage.customerManagedS3.roleArn");
    int EstimatedOn = jResp.IntOf(L"statistics.size.estimatedOn");
    int EstimatedSizeInBytes = jResp.IntOf(L"statistics.size.estimatedSizeInBytes");

    // 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
    //     }
    //   }
    // }
    }