Chilkat Online Tools

ListChannels 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 *channelName;
    const wchar_t *Bucket;
    const wchar_t *KeyPrefix;
    const wchar_t *RoleArn;
    int creationTime;
    int lastMessageArrivalTime;
    int lastUpdateTime;
    const wchar_t *status;
    const wchar_t *nextToken;
    int i;
    int count_i;

    // 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"ListChannels");

    sbResponseBody = CkStringBuilderW_Create();
    success = CkRestW_FullRequestNoBodySb(rest,L"GET",L"/channels",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.

    nextToken = CkJsonObjectW_stringOf(jResp,L"nextToken");
    i = 0;
    count_i = CkJsonObjectW_SizeOfArray(jResp,L"channelSummaries");
    while (i < count_i) {
        CkJsonObjectW_putI(jResp,i);
        channelName = CkJsonObjectW_stringOf(jResp,L"channelSummaries[i].channelName");
        Bucket = CkJsonObjectW_stringOf(jResp,L"channelSummaries[i].channelStorage.customerManagedS3.bucket");
        KeyPrefix = CkJsonObjectW_stringOf(jResp,L"channelSummaries[i].channelStorage.customerManagedS3.keyPrefix");
        RoleArn = CkJsonObjectW_stringOf(jResp,L"channelSummaries[i].channelStorage.customerManagedS3.roleArn");
        creationTime = CkJsonObjectW_IntOf(jResp,L"channelSummaries[i].creationTime");
        lastMessageArrivalTime = CkJsonObjectW_IntOf(jResp,L"channelSummaries[i].lastMessageArrivalTime");
        lastUpdateTime = CkJsonObjectW_IntOf(jResp,L"channelSummaries[i].lastUpdateTime");
        status = CkJsonObjectW_stringOf(jResp,L"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"
    // }


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

    }