Chilkat Online Tools

DescribeChannel unicodeC Example

AWS IoT Analytics

#include <C_CkRestW.h>
#include <C_CkAuthAwsW.h>
#include <C_CkStringBuilderW.h>
#include <C_CkJsonObjectW.h>

void ChilkatSample(void)
    {
    HCkRestW rest;
    BOOL success;
    HCkAuthAwsW authAws;
    HCkStringBuilderW sbResponseBody;
    int respStatusCode;
    HCkJsonObjectW jResp;
    const wchar_t *Arn;
    int CreationTime;
    int LastMessageArrivalTime;
    int LastUpdateTime;
    const wchar_t *Name;
    int NumberOfDays;
    int Unlimited;
    const wchar_t *Status;
    const wchar_t *Bucket;
    const wchar_t *KeyPrefix;
    const wchar_t *RoleArn;
    int EstimatedOn;
    int EstimatedSizeInBytes;

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

    rest = CkRestW_Create();

    authAws = CkAuthAwsW_Create();
    CkAuthAwsW_putAccessKey(authAws,L"AWS_ACCESS_KEY");
    CkAuthAwsW_putSecretKey(authAws,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.)
    CkAuthAwsW_putRegion(authAws,L"us-west-2");
    CkAuthAwsW_putServiceName(authAws,L"iotanalytics");
    // SetAuthAws causes Chilkat to automatically add the following headers: Authorization, X-Amz-Date
    CkRestW_SetAuthAws(rest,authAws);

    // URL: https://iotanalytics.us-west-2.amazonaws.com/
    // Use the same region as specified above.
    success = CkRestW_Connect(rest,L"iotanalytics.us-west-2.amazonaws.com",443,TRUE,TRUE);
    if (success != TRUE) {
        wprintf(L"ConnectFailReason: %d\n",CkRestW_getConnectFailReason(rest));
        wprintf(L"%s\n",CkRestW_lastErrorText(rest));
        CkRestW_Dispose(rest);
        CkAuthAwsW_Dispose(authAws);
        return;
    }

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

    sbResponseBody = CkStringBuilderW_Create();
    success = CkRestW_FullRequestNoBodySb(rest,L"GET",L"/channels/{channelName}",sbResponseBody);
    if (success != TRUE) {
        wprintf(L"%s\n",CkRestW_lastErrorText(rest));
        CkRestW_Dispose(rest);
        CkAuthAwsW_Dispose(authAws);
        CkStringBuilderW_Dispose(sbResponseBody);
        return;
    }

    respStatusCode = CkRestW_getResponseStatusCode(rest);
    wprintf(L"response status code = %d\n",respStatusCode);
    if (respStatusCode != 200) {
        wprintf(L"Response Header:\n");
        wprintf(L"%s\n",CkRestW_responseHeader(rest));
        wprintf(L"Response Body:\n");
        wprintf(L"%s\n",CkStringBuilderW_getAsString(sbResponseBody));
        CkRestW_Dispose(rest);
        CkAuthAwsW_Dispose(authAws);
        CkStringBuilderW_Dispose(sbResponseBody);
        return;
    }

    jResp = CkJsonObjectW_Create();
    CkJsonObjectW_LoadSb(jResp,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.

    Arn = CkJsonObjectW_stringOf(jResp,L"channel.arn");
    CreationTime = CkJsonObjectW_IntOf(jResp,L"channel.creationTime");
    LastMessageArrivalTime = CkJsonObjectW_IntOf(jResp,L"channel.lastMessageArrivalTime");
    LastUpdateTime = CkJsonObjectW_IntOf(jResp,L"channel.lastUpdateTime");
    Name = CkJsonObjectW_stringOf(jResp,L"channel.name");
    NumberOfDays = CkJsonObjectW_IntOf(jResp,L"channel.retentionPeriod.numberOfDays");
    Unlimited = CkJsonObjectW_IntOf(jResp,L"channel.retentionPeriod.unlimited");
    Status = CkJsonObjectW_stringOf(jResp,L"channel.status");
    Bucket = CkJsonObjectW_stringOf(jResp,L"channel.storage.customerManagedS3.bucket");
    KeyPrefix = CkJsonObjectW_stringOf(jResp,L"channel.storage.customerManagedS3.keyPrefix");
    RoleArn = CkJsonObjectW_stringOf(jResp,L"channel.storage.customerManagedS3.roleArn");
    EstimatedOn = CkJsonObjectW_IntOf(jResp,L"statistics.size.estimatedOn");
    EstimatedSizeInBytes = CkJsonObjectW_IntOf(jResp,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
    //     }
    //   }
    // }


    CkRestW_Dispose(rest);
    CkAuthAwsW_Dispose(authAws);
    CkStringBuilderW_Dispose(sbResponseBody);
    CkJsonObjectW_Dispose(jResp);

    }