Chilkat Online Tools

DescribeStatement C++ Example

Amazon Redshift Data API

#include <CkRest.h>
#include <CkAuthAws.h>
#include <CkJsonObject.h>
#include <CkStringBuilder.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("redshift-data");
    // SetAuthAws causes Chilkat to automatically add the following headers: Authorization, X-Amz-Date
    rest.SetAuthAws(authAws);

    // URL: https://redshift-data.us-west-2.amazonaws.com/
    // Use the same region as specified above.
    success = rest.Connect("redshift-data.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;
    }

    // The following code creates the JSON request body.
    // The JSON created by this code is shown below.

    // Use this online tool to generate code from sample JSON:
    // Generate Code to Create JSON

    CkJsonObject json;
    json.UpdateString("Id","string");

    // The JSON request body created by the above code:

    // {
    //   "Id": "string"
    // }

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

    CkStringBuilder sbRequestBody;
    json.EmitSb(sbRequestBody);
    CkStringBuilder sbResponseBody;
    success = rest.FullRequestSb("POST","/",sbRequestBody,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 *name = 0;
    const char *value = 0;

    const char *ClusterIdentifier = jResp.stringOf("ClusterIdentifier");
    int CreatedAt = jResp.IntOf("CreatedAt");
    const char *Database = jResp.stringOf("Database");
    const char *DbUser = jResp.stringOf("DbUser");
    int Duration = jResp.IntOf("Duration");
    const char *Error = jResp.stringOf("Error");
    int HasResultSet = jResp.IntOf("HasResultSet");
    const char *Id = jResp.stringOf("Id");
    const char *QueryString = jResp.stringOf("QueryString");
    int RedshiftPid = jResp.IntOf("RedshiftPid");
    int RedshiftQueryId = jResp.IntOf("RedshiftQueryId");
    int ResultRows = jResp.IntOf("ResultRows");
    int ResultSize = jResp.IntOf("ResultSize");
    const char *SecretArn = jResp.stringOf("SecretArn");
    const char *Status = jResp.stringOf("Status");
    int UpdatedAt = jResp.IntOf("UpdatedAt");
    int i = 0;
    int count_i = jResp.SizeOfArray("QueryParameters");
    while (i < count_i) {
        jResp.put_I(i);
        name = jResp.stringOf("QueryParameters[i].name");
        value = jResp.stringOf("QueryParameters[i].value");
        i = i + 1;
    }

    i = 0;
    count_i = jResp.SizeOfArray("SubStatements");
    while (i < count_i) {
        jResp.put_I(i);
        CreatedAt = jResp.IntOf("SubStatements[i].CreatedAt");
        Duration = jResp.IntOf("SubStatements[i].Duration");
        Error = jResp.stringOf("SubStatements[i].Error");
        HasResultSet = jResp.IntOf("SubStatements[i].HasResultSet");
        Id = jResp.stringOf("SubStatements[i].Id");
        QueryString = jResp.stringOf("SubStatements[i].QueryString");
        RedshiftQueryId = jResp.IntOf("SubStatements[i].RedshiftQueryId");
        ResultRows = jResp.IntOf("SubStatements[i].ResultRows");
        ResultSize = jResp.IntOf("SubStatements[i].ResultSize");
        Status = jResp.stringOf("SubStatements[i].Status");
        UpdatedAt = jResp.IntOf("SubStatements[i].UpdatedAt");
        i = i + 1;
    }

    // A sample JSON response body parsed by the above code:

    // {
    //   "ClusterIdentifier": "string",
    //   "CreatedAt": number,
    //   "Database": "string",
    //   "DbUser": "string",
    //   "Duration": number,
    //   "Error": "string",
    //   "HasResultSet": boolean,
    //   "Id": "string",
    //   "QueryParameters": [
    //     {
    //       "name": "string",
    //       "value": "string"
    //     }
    //   ],
    //   "QueryString": "string",
    //   "RedshiftPid": number,
    //   "RedshiftQueryId": number,
    //   "ResultRows": number,
    //   "ResultSize": number,
    //   "SecretArn": "string",
    //   "Status": "string",
    //   "SubStatements": [
    //     {
    //       "CreatedAt": number,
    //       "Duration": number,
    //       "Error": "string",
    //       "HasResultSet": boolean,
    //       "Id": "string",
    //       "QueryString": "string",
    //       "RedshiftQueryId": number,
    //       "ResultRows": number,
    //       "ResultSize": number,
    //       "Status": "string",
    //       "UpdatedAt": number
    //     }
    //   ],
    //   "UpdatedAt": number
    // }
    }