Chilkat Online Tools

ListChannels C++ Example

AWS IoT Analytics

#include <CkRest.h>
#include <CkAuthAws.h>
#include <CkStringBuilder.h>
#include <CkJsonObject.h>

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

    CkRest rest;
    bool success;

    CkAuthAws authAws;
    authAws.put_AccessKey("AWS_ACCESS_KEY");
    authAws.put_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.put_Region("us-west-2");
    authAws.put_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",443,true,true);
    if (success != true) {
        std::cout << "ConnectFailReason: " << rest.get_ConnectFailReason() << "\r\n";
        std::cout << rest.lastErrorText() << "\r\n";
        return;
    }

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

    CkStringBuilder sbResponseBody;
    success = rest.FullRequestNoBodySb("GET","/channels",sbResponseBody);
    if (success != true) {
        std::cout << rest.lastErrorText() << "\r\n";
        return;
    }

    int respStatusCode = rest.get_ResponseStatusCode();
    std::cout << "response status code = " << respStatusCode << "\r\n";
    if (respStatusCode != 200) {
        std::cout << "Response Header:" << "\r\n";
        std::cout << rest.responseHeader() << "\r\n";
        std::cout << "Response Body:" << "\r\n";
        std::cout << sbResponseBody.getAsString() << "\r\n";
        return;
    }

    CkJsonObject 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 char *channelName = 0;
    const char *Bucket = 0;
    const char *KeyPrefix = 0;
    const char *RoleArn = 0;
    int creationTime;
    int lastMessageArrivalTime;
    int lastUpdateTime;
    const char *status = 0;

    const char *nextToken = jResp.stringOf("nextToken");
    int i = 0;
    int count_i = jResp.SizeOfArray("channelSummaries");
    while (i < count_i) {
        jResp.put_I(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");
        lastMessageArrivalTime = jResp.IntOf("channelSummaries[i].lastMessageArrivalTime");
        lastUpdateTime = jResp.IntOf("channelSummaries[i].lastUpdateTime");
        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"
    // }
    }