Chilkat Online Tools

DescribeChannel C Example

AWS IoT Analytics

#include <C_CkRest.h>
#include <C_CkAuthAws.h>
#include <C_CkStringBuilder.h>
#include <C_CkJsonObject.h>

void ChilkatSample(void)
    {
    HCkRest rest;
    BOOL success;
    HCkAuthAws authAws;
    HCkStringBuilder sbResponseBody;
    int respStatusCode;
    HCkJsonObject jResp;
    const char *Arn;
    int CreationTime;
    int LastMessageArrivalTime;
    int LastUpdateTime;
    const char *Name;
    int NumberOfDays;
    int Unlimited;
    const char *Status;
    const char *Bucket;
    const char *KeyPrefix;
    const char *RoleArn;
    int EstimatedOn;
    int EstimatedSizeInBytes;

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

    rest = CkRest_Create();

    authAws = CkAuthAws_Create();
    CkAuthAws_putAccessKey(authAws,"AWS_ACCESS_KEY");
    CkAuthAws_putSecretKey(authAws,"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.)
    CkAuthAws_putRegion(authAws,"us-west-2");
    CkAuthAws_putServiceName(authAws,"iotanalytics");
    // SetAuthAws causes Chilkat to automatically add the following headers: Authorization, X-Amz-Date
    CkRest_SetAuthAws(rest,authAws);

    // URL: https://iotanalytics.us-west-2.amazonaws.com/
    // Use the same region as specified above.
    success = CkRest_Connect(rest,"iotanalytics.us-west-2.amazonaws.com",443,TRUE,TRUE);
    if (success != TRUE) {
        printf("ConnectFailReason: %d\n",CkRest_getConnectFailReason(rest));
        printf("%s\n",CkRest_lastErrorText(rest));
        CkRest_Dispose(rest);
        CkAuthAws_Dispose(authAws);
        return;
    }

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

    sbResponseBody = CkStringBuilder_Create();
    success = CkRest_FullRequestNoBodySb(rest,"GET","/channels/{channelName}",sbResponseBody);
    if (success != TRUE) {
        printf("%s\n",CkRest_lastErrorText(rest));
        CkRest_Dispose(rest);
        CkAuthAws_Dispose(authAws);
        CkStringBuilder_Dispose(sbResponseBody);
        return;
    }

    respStatusCode = CkRest_getResponseStatusCode(rest);
    printf("response status code = %d\n",respStatusCode);
    if (respStatusCode != 200) {
        printf("Response Header:\n");
        printf("%s\n",CkRest_responseHeader(rest));
        printf("Response Body:\n");
        printf("%s\n",CkStringBuilder_getAsString(sbResponseBody));
        CkRest_Dispose(rest);
        CkAuthAws_Dispose(authAws);
        CkStringBuilder_Dispose(sbResponseBody);
        return;
    }

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


    CkRest_Dispose(rest);
    CkAuthAws_Dispose(authAws);
    CkStringBuilder_Dispose(sbResponseBody);
    CkJsonObject_Dispose(jResp);

    }